Tokushima University / Educator and Researcher Directory --- SATO, Katsuya

Personal Web Page

http://bml.me.tokushima-u.ac.jp

https://researchmap.jp/read0141545 (researchmap)

Field of Study

○	Cell Biomechanics
○	Bio Micro Electro Mechanical Systems

Subject of Study

○	Evaluation of mechanical condition that cell sense and respond (cell, Mechanotransduction, MEMS, Biomechanics)
○	Cell biomechanis using MEMS device (cell, biomechanics, mechanical engineering)

Book / Paper

Book:

1.	Yuta NAKASHIMA, Katsuya SATO, Takashi YASUDA and Kazuyuki MINAMI : Cell Differentiation Induction Using Extracellular Stimulation Controlled by a Micro Device, INTECH, Rijeka, Dec. 2011.
2.	Taiji ADACHI, Katsuya SATO, Masaki HOJO and Yoshihiro TOMITA : Cytoskeletal Reassembling and Calcium Signaling Responses to Mechanical Perturbation in Osteoblastic cells, Snigapore, Mar. 2007.
3.	Taiji ADACHI and Katsuya SATO : Threshold fiber strain that induces reorganization of cytoskeletal actin structure in osteoblastic cells, Jun. 2006.
4.	Taiji ADACHI and Katsuya SATO : Osteoblastic mechanosensitivity to localized mechanical stimulus depends on orientation of cytoskeletal actin fibers, Mar. 2005.

Academic Paper (Judged Full Paper):

1.	Katsuya SATO, Takeo Minamikawa and Takeshi Yasui : Raman Spectroscopic Evaluation of Composition of Matrix Synthesized by Osteoblasts under Microvibration Stimulation, Advanced Biomedical Engineering, Vol.13, 11-18, 2024. (Link to Publication Site) ● Publication site (DOI): 10.14326/abe.13.11 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.14326/abe.13.11 (DOI: 10.14326/abe.13.11)
2.	Minami Kazuyuki, Nakahara Tasuku and Katsuya SATO : Evaluation of the basic designs of a micro device that provides vibration stimulation to cells, Journal of Robotics and Mechatoronics, Vol.35, No.5, 1151-1157, 2023.
3.	Katsuya SATO, Nakahara Tasuku and Minami Kazuyuki : Difference in the osteoblastic calcium signaling response between compression and stretching mechanical stimuli, Journal of Robotics and Mechatoronics, Vol.35, No.5, 1135-1142, 2023.
4.	Kazuhide Mineda, Katsuya SATO, Tasuku NAKAHARA, Kazuyuki MINAMI, Yutaro Yamashita, soshi ISHIDA, Yoshiro Abe and Ichiro Hashimoto : Cyclical Stretching Induces Excess Intracellular Ca2+ Influx in Human Keloid-Derived Fibroblasts In Vitro, Plastic and Reconstructive Surgery, Vol.151, No.2, 346-354, 2023. (Summary) The incidence of keloids is higher in the case of darker skin. It is more common in the parts exposed to stretching (thorax, abdomen, and joints). Cyclical stretching reportedly induced each Ca2+ spike through differential mechanosensitive channels in human synovial and dermal fibroblasts. Therefore, the authors hypothesized that cyclical stretching also induces a specific Ca2+ spike in keloid-derived fibroblasts. This in vitro study compared the intracellular calcium dynamics induced by cyclical stretching between control (human dermal fibroblasts) and keloid (human keloid-derived fibroblasts) groups. Each group was exposed to two-dimensional stretch using an originally developed stretch microdevice. Intracellular Ca2+ was observed for 5 minutes, including 30 seconds of baseline, under a fluorescent confocal laser microscope. The intracellular Ca2+ concentration was evaluated every 0.5 second using the fluorescence intensity ratio. A positive cellular response was defined as a rise of the ratio by greater than or equal to 20%. The normal response cutoff value was determined by receiver operating characteristic analysis. The keloid groups were significantly more responsive than the control groups (15.7% versus 8.2%; P = 0.029). In the cellular response-positive cells, the keloid groups reached significantly higher intracellular Ca2+ concentration peaks than the control groups (2.20 versus 1.26; P = 0.0022). The cutoff value was 1.77, and 10.4% of the keloid-derived fibroblasts exhibited a hyper-Ca2+ spike above the normal range. Keloid-derived fibroblasts with a hyper-Ca2+ spike might constitute a keloid-specific subpopulation. Hereafter, the authors will study whether the normalization of excessive intracellular Ca2+ concentration leads to keloid treatment in vivo. This study result provided a clue to the onset mechanism of keloids, which the authors hope will lead to the development of new therapy in the future. (Keyword) Humans / Keloid / Calcium / Fibroblasts / Skin / Cells, Cultured (Link to Publication Site) ● Publication site (DOI): 10.1097/PRS.0000000000009843 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 36696319 ● Search Scopus @ Elsevier (PMID): 36696319 ● Search Scopus @ Elsevier (DOI): 10.1097/PRS.0000000000009843 (DOI: 10.1097/PRS.0000000000009843, PubMed: 36696319)
5.	Katsuya SATO and Daiki Omori : Development of vibration mechanical stimuli loading device for live cell fluorescence microscopy, Journal of Biomechanical Science and Engineering, Vol.17, No.2, 2022. (Summary) <p>Bone metabolism is regulated by mechanical stimuli such as gravity and exercise. If bone formation can be promoted by artificial mechanical stimulation, the quality of life of the aging society can be improved, such as by reducing the progression of osteoporosis and preventing patients from being bedridden. Micro-vibration stimulation with frequencies of 15 Hz to 90 Hz and acceleration amplitudes of 0.1 g to 0.3 g is effectively promotes bone formation in animal models. However, the mechanism of how these weak vibrations are sensed by bone cells and are used to regulate bone metabolism is unknown. In this study, we developed a device to apply micro-vibration stimuli to osteoblasts cultured on a glass bottom dish and observed the cell response to the stimuli using a confocal laser scanning fluorescence microscope. The device performance was confirmed using driving tests, and the calcium signaling response of osteoblasts to micro-vibration stimuli was observed in real time and <i>in situ</i>. The calcium signaling response characteristics of the cells differed when the cells were subjected to 45 Hz and 90 Hz micro-vibration stimuli, even under a constant acceleration amplitude of 0.2 g.</p> (Keyword) Vibration stimuli / Osteoblast / Calcium signaling / Cell biomechanics / Mechanotransduction (Tokushima University Institutional Repository) ● Metadata: 117322 (Link to Publication Site) ● Publication site (DOI): 10.1299/jbse.21-00294 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390010532996635264 ● Search Scopus @ Elsevier (DOI): 10.1299/jbse.21-00294 (Tokushima University Institutional Repository: 117322, DOI: 10.1299/jbse.21-00294, CiNii: 1390010532996635264)
6.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : Quantitative evaluation of both histological and mechanical recovery in injured tendons using Fourier-transform second-harmonic-generation microscopy, IEEE Journal of Selected Topics in Quantum Electronics, Vol.27, No.4, 6801608, 2021. (Link to Publication Site) ● Publication site (DOI): 10.1109/JSTQE.2021.3063535 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1109/JSTQE.2021.3063535 (DOI: 10.1109/JSTQE.2021.3063535)
7.	Katsuya SATO, Oki Matsubara, Eiji Hase, Takeo Minamikawa and Takeshi Yasui : Quantitative in situ time-series evaluation of osteoblastic collagen synthesis under cyclic strain using second-harmonic-generation microscopy, Journal of Biomedical Optics, Vol.24, No.3, 031019, 2019. (Summary) The aim of this study is to provide an in situ method to non-invasively monitor osteoblastic collagen synthesis under mechanical stimulation. We applied second-harmonic-generation (SHG) microscopy to monitor the collagen fibers produced by osteoblast-like cells. To evaluate the influence of mechanical stimulation on collagen synthesis and maturation, we compared SHG images of osteoblast-produced collagen fibers with and without a cyclic stretch stimulus. Image analysis of the average SHG intensity indicated that the amount of osteoblastic collagen synthesis was significantly enhanced by the cyclic stretch. Furthermore, the maturity of the collagen fibers was not affected in the early stage of bone formation by the mechanical stimulus.© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. (Keyword) Collagen / Humans / Image Interpretation, Computer-Assisted / Microscopy / Stress, Mechanical (Link to Publication Site) ● Publication site (DOI): 10.1117/1.JBO.24.3.031019 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 30635995 ● Search Scopus @ Elsevier (PMID): 30635995 ● Search Scopus @ Elsevier (DOI): 10.1117/1.JBO.24.3.031019 (DOI: 10.1117/1.JBO.24.3.031019, PubMed: 30635995)
8.	Katsuya SATO, Manabu Katayama, Shoichiro Fujisawa, Tasuku Nakahara and Minami Kazuyuki : Evaluation of initiating characteristics of osteoblastic calcium signaling response to stretch by video rate time-course observation, Journal of Biomechanical Science and Engineering, Vol.13, No.4, 17-00519, 2018. (Tokushima University Institutional Repository) ● Metadata: 113894 (Link to Publication Site) ● Publication site (DOI): 10.1299/jbse.17-00519 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1299/jbse.17-00519 (Tokushima University Institutional Repository: 113894, DOI: 10.1299/jbse.17-00519)
9.	Eiji Hase, Takeo Minamikawa, Takahiko Mizuno, Shuji Miyamoto, Ryuji Ichikawa, Yi-Da Hsieh, Kyuki Shibuya, Katsuya SATO, Yoshiaki Nakajima, Akifumi Asahara, Kaoru Minoshima, Yasuhiro Mizutani, Tetsuo Iwata, Hirotsugu Yamamoto and Takeshi Yasui : Scan-less confocal phase imaging based on dual-comb microscopy, Optica, Vol.5, No.5, 634-643, 2018. (Summary) Confocal laser microscopy (CLM) is a powerful tool in life science research and industrial inspection because it offers two-dimensional optical sectioning or three-dimensional imaging capability with micrometer depth selectivity. Furthermore, scan-less imaging modality enables rapid image acquisition and high robustness against surrounding external disturbances in CLM. However, the objects to be measured must be reflective, absorptive, scattering, or fluorescent because the image contrast is given by the optical intensity. If a new image contrast can be provided by the optical phase, scan-less CLM can be further applied for transparent non-fluorescent objects or reflective objects with nanometer unevenness by providing information on refractive index, optical thickness, or geometrical shape. Here, we report scan-less confocal dual-comb microscopy offering a phase image in addition to an amplitude image with depth selectivity by using an optical frequency comb as an optical carrier of amplitude and phase with discrete ultra-multichannels. Our technique encodes confocal amplitude and phase images of a sample onto a series of discrete modes in the optical frequency comb with well-defined amplitude and phase to establish a one-to-one correspondence between image pixels and comb modes. The technique then decodes these images from comb modes with amplitude and phase. We demonstrate confocal phase imaging with milliradian phase resolution under micrometer depth selectivity on the millisecond timescale. As a proof of concept, we demonstrate the quantitative phase imaging of standing culture fixed cells and the surface topography of nanometer-scale step structures. Our technique for confocal phase imaging will find applications in three-dimensional visualization of stacked living cells in culture and nanometer surface topography of semiconductor objects. (Tokushima University Institutional Repository) ● Metadata: 113646 (Link to Publication Site) ● Publication site (DOI): 10.1364/OPTICA.5.000634 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85047275172 (Tokushima University Institutional Repository: 113646, DOI: 10.1364/OPTICA.5.000634, Elsevier: Scopus)
10.	Kazuyuki MINAMI, Tatsuya HAYASHI, Katsuya SATO and Tasuku NAKAHARA : Development of micro mechanical device having two-dimensional array of micro chambers for cell stretching, Biomedical Microdevices, Vol.20, No.1, 10, 2018. (Summary) This paper presents a novel cell stretching micro device having two-dimensional array of micro chambers. It enables an in situ time-lapse observation of stretched cell by using an optical microscope with high measurement efficiency. The presented device consists of a cell culture dish and the array of micro chambers made of silicone elastomer and extension structures made of photocurable resin, and is fabricated with MEMS technology. The fabrication process of the thin micro chamber array combines photoresist mold and lift-off process based on conventional photolithography. The fabricated device has 134micro chambers in 5μm or less thickness. It was demonstrated that the fabricated micro device could be used to make in-situ time-lapse observation of cell responses to stretching under optical microscopy. In addition, the influence of the chamber thickness to the quality of the microscope image observed was evaluated. It is confirmed that the proposed device having two-dimensional array of the thin micro chambers makes it possible to observe cell response for stretch stimuli with high quality and efficiency. (Keyword) Cell stretching / Mechanical stimulation / Cellular response / Thin micro chamber / Two-dimensional array (Link to Publication Site) ● Publication site (DOI): 10.1007/s10544-017-0256-2 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 29305659 ● Search Scopus @ Elsevier (PMID): 29305659 ● Search Scopus @ Elsevier (DOI): 10.1007/s10544-017-0256-2 (DOI: 10.1007/s10544-017-0256-2, PubMed: 29305659)
11.	Katsuya SATO, Kenta NUNOBIKI, Shoichiro Fujisawa, Tasuku NAKAHARA and Kazuyuki MINAMI : In situ observation and measurement of actin stress fiber deformation in stretched osteoblast like cell, Advances in Bioscience and Biotechnology, Vol.8, 421-433, 2017. (Keyword) Actin cytoskeleton / Stretching stimuli / osteoblast / Cell biomechanics / MEMS (Tokushima University Institutional Repository) ● Metadata: 113893 (Link to Publication Site) ● Publication site (DOI): 10.4236/abb.2017.811031 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.4236/abb.2017.811031 (Tokushima University Institutional Repository: 113893, DOI: 10.4236/abb.2017.811031)
12.	Shoichiro Fujisawa, Ishibashi Tatsuki, Katsuya SATO, Shin-ichi Ito and Osamu Sueda : Evaluation of Orientation Performance of Attention Patterns for Blind Person, Studies in Health Technology and Informatics, Vol.242, 910-917, 2017. (Summary) Tactile walking surface indicators (TWSIs) are installed on footpath to support independent travel for the blind. There are two types of TWSIs, attention patterns and guiding patterns. The attention pattern is usually installed at the crosswalk entrances. The direction of the crossing can be acquired by the row of the projection of the attention pattern through the soles of the shoes. In addition, truncated domes or cones of the attention pattern were arranged in a square grid, parallel or diagonal at 45 degrees to the principal direction of travel. However, the international standard organization (ISO) allows a wide-ranging size. In this research, the direction indicating performance was compared at the same intervals for the five diameters specified by the international standard. As a result of the experiment, the diagonal array does not indicate the direction of travel, but the projection row does indicate the direction of travel in the parallel array. When the attention pattern is installed at a crosswalk entrance, a parallel array should be installed in the direction of the crossing. (Keyword) Tactile walking surface indicators (TWSIs) / Attention patterns / Blind person / Orientation / Crosswalk / Direction of travel (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-798-6-910 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 28873905 ● Summary page in Scopus @ Elsevier: 2-s2.0-85028884192 (DOI: 10.3233/978-1-61499-798-6-910, PubMed: 28873905, Elsevier: Scopus)
13.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : Observation of Tendon Healing with Second-harmonic-generation (SHG) Microscopy, Transactions of the Japanese Society for Medical and Biological Engineering, Vol.54, No.6, 253-260, 2016. (Summary) <p>Tendon rupture is a traumatic injury that is difficult to recover to the condition before injury. In previous studies, histological staining and tensile testing have been widely used to evaluate histological and mechanical healing. However, since both methods are destructive and invasive, it is difficult to apply these methods to clinical diagnosis. If the degree of healing can be visualized nondestructively and noninvasively, new findings may be obtained regarding mechanisms of the tendon healing process. In this study, we used second-harmonic-generation (SHG) microscopy to evaluate the degree of healing of ruptured tendon in a rabbit model. SHG microscopy has high selectivity and high image contrast with respect to the structural maturity, density, and aggregates of collagen molecule, without the need for histological sectioning and staining. Furthermore, since SHG light intensity sensitively reflects the structural maturity of collagen molecule and its aggregates, it has the potential to be a good indicator for the degree of healing of the injured tendon. By comparing the SHG images between 4-week-healing tendons and normal tendons in the animal model, we confirmed that SHG light intensity of the healing tendon was significantly lower than that of the normal tendon, indicating that the collagen structure in the healing tendon is still immature. Furthermore, we performed image analysis based on 2D Fourier transform of the acquired SHG images, and confirmed a significant difference in collagen distribution depending on the sample. These results indicate that SHG microscopy has the unique potential as an indicator of tendon healing.</p> (Keyword) second-harmonic-generation / microscopy / tendon / collagen / healing / image analysis (Link to Publication Site) ● Publication site (DOI): 10.11239/jsmbe.54.253 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205270574720 ● Search Scopus @ Elsevier (DOI): 10.11239/jsmbe.54.253 (DOI: 10.11239/jsmbe.54.253, CiNii: 1390001205270574720)
14.	Eiji Hase, Katsuya SATO, Daisuke Yonekura, Takeo Minamikawa, Mitsuhiko Takahashi and Takeshi Yasui : Evaluation of the histological and mechanical features of tendon healing in a rabbit model with the use of second-harmonic-generation imaging and tensile testing, Bone & Joint Research, Vol.5, No.11, 577-585, 2016. (Summary) This study aimed to evaluate the histological and mechanical features of tendon healing in a rabbit model with second-harmonic-generation (SHG) imaging and tensile testing. A total of eight male Japanese white rabbits were used for this study. The flexor digitorum tendons in their right leg were sharply transected, and then were repaired by intratendinous stitching. At four weeks post-operatively, the rabbits were killed and the flexor digitorum tendons in both right and left legs were excised and used as specimens for tendon healing (n = 8) and control (n = 8), respectively. Each specimen was examined by SHG imaging, followed by tensile testing, and the results of the two testing modalities were assessed for correlation. While the SHG light intensity of the healing tendon samples was significantly lower than that of the uninjured tendon samples, 2D Fourier transform SHG images showed a clear difference in collagen fibre structure between the uninjured and the healing samples, and among the healing samples. The mean intensity of the SHG image showed a moderate correlation (R(2) = 0.37) with Young's modulus obtained from the tensile testing. Our results indicate that SHG microscopy may be a potential indicator of tendon healing.Cite this article: E. Hase, K. Sato, D. Yonekura, T. Minamikawa, M. Takahashi, T. Yasui. Evaluation of the histological and mechanical features of tendon healing in a rabbit model with the use of second-harmonic-generation imaging and tensile testing. Bone Joint Res 2016;5:577-585. DOI: 10.1302/2046-3758.511.BJR-2016-0162.R1. (Tokushima University Institutional Repository) ● Metadata: 115027 (Link to Publication Site) ● Publication site (DOI): 10.1302/2046-3758.511.BJR-2016-0162.R1 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27881441 ● Search Scopus @ Elsevier (PMID): 27881441 ● Search Scopus @ Elsevier (DOI): 10.1302/2046-3758.511.BJR-2016-0162.R1 (Tokushima University Institutional Repository: 115027, DOI: 10.1302/2046-3758.511.BJR-2016-0162.R1, PubMed: 27881441)
15.	Eiji Hase, Oki Matsubara, Takeo Minamikawa, Katsuya SATO and Takeshi Yasui : In situ time-series monitoring of collagen fibers produced by standing-cultured osteoblasts using a second-harmonic-generation microscope., Applied Optics, Vol.55, No.12, 3261-3267, 2016. (Summary) In bone tissue engineering and regeneration, there is a considerable need for an unstained method of monitoring collagen fibers produced by osteoblasts. This is because collagen fibers play an important role as a bone matrix and continuous monitoring of their temporal dynamics is important in clarifying the organization process toward forming bone tissue. In the work described here, using a second-harmonic-generation (SHG) microscope, we performed in situ time-series monitoring of collagen fibers produced by cultured osteoblasts without the need for staining. Use of the 19 fs near-infrared pulsed light enables us to visualize the temporal dynamics in a thin layer of collagen fibers produced by a single layer of osteoblasts in high-contrast SHG images. While the collagen fibers were produced and stored inside the osteoblasts at an early stage of culturing, the network structure of collagen fibers was formed and locally condensed at a late stage. Furthermore, we extracted a quantitative parameter of collagen maturity degree in the cultured sample by use of image analysis based on a two-dimensional Fourier transform of the SHG image. The proposed method will be useful for in situ quality and quantity control of collagen fibers in bone tissue engineering and regeneration. (Link to Publication Site) ● Publication site (DOI): 10.1364/AO.55.003261 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 27140096 ● Summary page in Scopus @ Elsevier: 2-s2.0-84964507940 (DOI: 10.1364/AO.55.003261, PubMed: 27140096, Elsevier: Scopus)
16.	Norihiro Ikeda, Kazuya Takahashi, Tomoyuki Inagaki, Katsuya SATO, Shin-ichi Ito, Motohiro Seiyama and Shoichiro Fujisawa : Emitting LED block at crosswalk entrance for visually impaired persons, Procedia Manufacturing, Vol.3, 3147-3151, 2015. (Summary) Visually impaired persons require tactile walking surface indicators (TWSIs) for independent walking. However, if these blocks are installed following guidelines for constructing TWSIs, it's unkind to users. Therefore, we propose LED blocks installed at crosswalk entrances for blind and visually impaired persons. These blocks can be detected through the soles of shoes and through use of residual vision. This study conducted an experiment with amblyopic examinees in which we evaluate the visibility of the LED blocks. (Keyword) TWSIs / Visually impaired person / Assistive devices / LED block / Crosswalk (Link to Publication Site) ● Publication site (DOI): 10.1016/j.promfg.2015.07.863 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.promfg.2015.07.863 (DOI: 10.1016/j.promfg.2015.07.863)
17.	Jiro Yonezaki, Maki Ikeda, Takuya Tsubaki, Katsuya SATO, Shin-ichi Ito, Osamu Sueda and Shoichiro Fujisawa : Development of Augmentative and Alternative Communication Assessment Tools for Patients with ALS, Studies in Health Technology and Informatics, Vol.217, 805-810, 2015. (Summary) Amyotrophic lateral sclerosis (ALS) is a progressive, intractable disease that causes the body to gradually become weaker. A communication device for the handicapped with a high degree of disability (see Fig. 1) is often used for a seriously ill ALS patient. However, the degree of the symptoms differs in each patient, so it is necessary to select a suitable input switch. Moreover, the selection of the switch is greatly influenced by differences in knowledge and experience, so support is often advanced preceded by a subjective evaluation [1]-[6]. This research developed an evaluation apparatus capable of measuring the movement of the finger from the displacement of the lever using a sensor built into the input switch. As a result, appropriate support is expected to evaluate patient's remaining function based on objective data when the input switch is selected. (Keyword) Augmentative and Alternative Communication (AAC) / Amyotrophic lateral sclerosis (ALS) (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-566-1-805 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 26294567 ● Summary page in Scopus @ Elsevier: 2-s2.0-84951912232 (DOI: 10.3233/978-1-61499-566-1-805, PubMed: 26294567, Elsevier: Scopus)
18.	Shoichiro Fujisawa, Kyohei Hirono, Shin-ichi Ito, Katsuya SATO and Osamu Sueda : Walking Characteristics of Persons with Visually Impairment Crossing Intersections with Audible Pedestrian Signals, Studies in Health Technology and Informatics, Vol.217, 633-638, 2015. (Summary) The authors have been continuously researching tactile walking surface indicators and audible pedestrian signals used for crossing intersections. A pedestrian walks to the opposite side of the crosswalk using audible pedestrian signals. The position where the audible pedestrian signal is set up clearly influences the pedestrian's path. We performed an intersection crossing experiment with road noise for different positions where the audible pedestrian signal was set up. Vehicle road noise is thought to influence walking pedestrians. However, we could not clearly separate the difference of where the audible pedestrian signal was set up from the influence of the road noise. We therefore conducted the experiment with no road noise in the intersection to determine the difference of the position where the audible pedestrian signal was set up. The research results were compared with and without road noise to specify the road noise influence. (Keyword) Tactile walking surface indicators / Audible pedestrian signals / person with visually impairment / veering distance (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-566-1-633 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 26294540 ● Summary page in Scopus @ Elsevier: 2-s2.0-84951940140 (DOI: 10.3233/978-1-61499-566-1-633, PubMed: 26294540, Elsevier: Scopus)
19.	Norihiro Ikeda, Kazuya Takahashi, Tomoyuki Inagaki, Katsuya SATO, Shin-ichi Ito, Motohiro Seiyama, Kiyohito Takeuchi, Hiroshi Ogino and Shoichiro Fujisawa : Visibility of LED Blocks Mounted on Crosswalk Boundaries for low Visual Capacity, Studies in Health Technology and Informatics, Vol.217, 512-517, 2015. (Summary) According to the WHO, about 80% of visually impaired persons in the world are with low visual capacity. It is considered that LVs' safe independent mobility will be improved as employing Tactile Walking Surface Indicators (TWSIs). In the night, guidelines for constructing warning blocks, a kind of tactile surface indicator, have not been well established. Therefore, crossing crosswalks is one of the most dangerous situations for visually impaired persons. We thus developed novel LED blocks that indicate crosswalk boundaries between sidewalks and roadways. This study addresses the LED blocks under various environmental illuminations and illumination from the opposite side of the crossing. (Keyword) LED block / Crosswalk / Visual distance / Turbulence illumination / Tactile Walking Surface Indicators (TWSIs) (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-566-1-512 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 26294521 ● Summary page in Scopus @ Elsevier: 2-s2.0-84952054448 (DOI: 10.3233/978-1-61499-566-1-512, PubMed: 26294521, Elsevier: Scopus)
20.	Katsuya SATO, Yuki OGAWA, Shin-ichi Ito, Shoichiro Fujisawa and Kazuyuki MINAMI : Strain magnitude dependent intracellular calcium signaling response to uniaxial stretch in osteoblastic cells, Journal of Biomechanical Science and Engineering, Vol.10, No.3, 1-11, 2015. (Summary) In osteoblast cells, cells change their intracellular Ca2+ concentration ([Ca2+]i) as the response to mechanical stimuli. Although it has been reported that osteoblast cells responded to many kinds of mechanical stimuli including stretch of substrate, shear stress in fluid flow, direct indentation of glass microneedle and hydrostatic pressure etc., the detail of the characteristics of intracellular calcium signaling response to substrate stretch still remains unclear because motion artifact during stretch application causes out of focus plane and observation area, and complicates the in situ time lapse observation of change in [Ca2+]i in a single cell level. In this study, we combined our originally developed cell stretching MEMS device with the ratiometric microscopy method with two kinds of visible wavelength calcium indicator dyes. The cell stretching micro device and the ratiometric method reduce the influence of motion artifact during stretch application, and enable us to quantitatively evaluate the characteristics of cellular calcium signaling response to stretch. MC3T3-E1 osteoblastic cells were plated onto the cell stretching micro device and fluorescently labeled by Ca2+ indicator Fluo 3 and Fura Red. A uniaxial stretch with three magnitudes of strain 5%, 10% and 15% with constant strain rate were applied to the cells, and in situ time lapse observation of cellular calcium signaling response to stretch was conducted with high temporal and spatial resolution. We succeeded in obtaining time lapse fluorescent image sequences during stretch application without excessive out of focus and blank time. The results revealed that MC3T3-E1 cells change the intensity of calcium signaling response to stretch according to the stretch strain magnitude. As stretch strain magnitude was increased, the amount of change in fluorescent ratio value of Ca2+ indicators in stretched cells also increased. This result suggests the possibility that osteoblastic cells can sense the magnitude of mechanical stimuli at upstream of mechanotransduction pathway such as influx of extracellular Ca2+. (Keyword) Cell Biomechanics / Mechanotransduction / osteoblast / intracellular calcium / Stretch stimuli (Link to Publication Site) ● Publication site (DOI): 10.1299/jbse.15-00242 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680238072960 ● Search Scopus @ Elsevier (DOI): 10.1299/jbse.15-00242 (DOI: 10.1299/jbse.15-00242, CiNii: 1390282680238072960)
21.	Shin-ichi Ito, Momoyo Ito, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Preference Analysis Method Applying Relationship between Electroencephalogram Activities and Egogram in Prefrontal Cortex Activities, --- How to collaborate between engineering techniques and psychology ---, International Journal of Advances in Psychology, Vol.3, No.3, 86-93, 2014. (Summary) This paper introduces a method of preference analysis based on electroencephalogram (EEG) analysis of prefrontal cortex activity. The proposed method applies the relationship between EEG activity and the Egogram. The EEG senses a single point and records readings by means of a dry-type sensor and a small number of electrodes. The EEG analysis adapts the feature mining and the clustering on EEG patterns using a self-organizing map (SOM). EEG activity of the prefrontal cortex displays individual difference. To take the individual difference into account, we construct a feature vector for input modality of the SOM. The input vector for the SOM consists of the extracted EEG feature vector and a human character vector, which is the human character quantified through the ego analysis using psychological testing. In preprocessing, we extract the EEG feature vector by calculating the time average on each frequency band: theta, low-beta, and high-beta. To prove the effectiveness of the proposed method, we perform experiments using real EEG data. These results show that the accuracy rate of the EEG pattern classification is higher than it was before the improvement of the input vector. (Keyword) egogram / electroencephalogram / Individual difference / self-organizing map / pattern recognition (Tokushima University Institutional Repository) ● Metadata: 113282 (Link to Publication Site) ● Publication site (DOI): 10.14355/ijap.2014.0303.03 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.14355/ijap.2014.0303.03 (Tokushima University Institutional Repository: 113282, DOI: 10.14355/ijap.2014.0303.03)
22.	Shin-ichi Ito, Momoyo Ito, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Preference Classification Method Using EEG Analysis Based on Gray Theory and Personality Analysis, The Online Journal on Computer Science and Information Technology, OJCSIT, Vol.4, No.3, 276-280, 2014. (Summary) This paper introduces a method to classify the preference patterns of sounds on the basis of an electroencephalogram (EEG) analysis and a personality analysis. We analyze the EEG of the left prefrontal cortex by single-point sensing. For EEG recording, a dry-type sensor and few electrodes were used. The proposed feature extraction method employs gray relational grade detection on the frequency bands of EEG and egogram. The gray relational grade is used for extracting the EEG feature. The egogram is extracted for quantifying the subject's personality. The preference patterns generated when the subject is hearing a sound are classified using the nearest neighbor method. To show the effectiveness of the proposed method, we conduct experiments using real EEG data. These results show that the accuracy rate of the preference classification using the proposed method is better than that using the method that does not to consider the subject's personality. (Keyword) egogram / electroencephalogram / Individual difference / gray model / pattern recognition (Tokushima University Institutional Repository) ● Metadata: 112402 (Tokushima University Institutional Repository: 112402)
23.	Kuramoto Nobuhisa, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Electroencephalogram Analysis of Mechanisms Underlying Brain Activity during Voluntary Movement, International Journal of Bioscience, Biochemistry, Bioinformatics (IJBBB), Vol.4, No.1, 49-56, 2014. (Summary) This paper proposes an electroencephalogram (EEG)-based method for identifying the mechanism underlying brain activity during a voluntary movement. Our final goal is to develop a rehabilitation assistance system that can be used on a daily basis by observing a patients degree of functional recovery. In order to assist in ambulation rehabilitation, the mechanism related to the voluntary movement need to be identified. As a first step, we elucidated the mechanism underlying brain activity. The proposed method involves EEG recording, blind source separation, noise reduction, and feature enhancement. The EEG device has dry-type sensors. Independent component analysis is used to delink the signal. Median morphological filters are used to reduce EEG noise and emphasize the feature signal. To demonstrate the effectiveness of the proposed method, we conducted experiments using real EEG data. (Link to Publication Site) ● Publication site (DOI): 10.7763/IJBBB.2014.V4.309 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.7763/IJBBB.2014.V4.309 (DOI: 10.7763/IJBBB.2014.V4.309)
24.	NAKASHIMA Yuta, MONJI Ryo, Katsuya SATO and MINAMI Kazuyuki : Development of higly precise cell stretching microdevice and in-situ observation of stretched cell, IEEJ Transactions on Sensors and Micromachines, Vol.133, No.12, 350-357, 2013. (Summary) This paper presents a cell stretching microdevice for in-situ observation of stretched cell. In a conventional cell stretching device, it was difficult to observe the initial and in-situ cellular response to stretching. The presented device consists of an elastic culture chamber and leaf springs by which uniaxial stretch is applied to the culture chamber. The device is produced by a micro three-dimensional structure fabrication process using multiple exposures to the photoresist. The device permits the observation of cellular responses to stretching in real time because it is made of transparent materials when observed by optical microscope. We demonstrated the fundamental characteristics of a microdevice, and observed the cellular response behavior by a fabricated microdevice. The amount of the culture chamber deformation was controlled by the amount of the stretching arm displacement. Also, we demonstrated the culture chamber during stretching was not deformed toward the optical axis. Moreover, in-situ observation of transition of the cellular calcium signaling response to stretching succeeded by optical microscopy using fabricated microdevice. These results indicated that this device can be used to observe and evaluate the initial cellular response and micro-strain field on a cell membrane during uniaxial stretching. (Keyword) Cell Stretching / Mechanical Stimulation / Cellular Response Evaluation / Cell Biomechanics (Link to Publication Site) ● Publication site (DOI): 10.1541/ieejsmas.133.350 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679439122816 ● Search Scopus @ Elsevier (DOI): 10.1541/ieejsmas.133.350 (DOI: 10.1541/ieejsmas.133.350, CiNii: 1390282679439122816)
25.	Matsubara Kayoko, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Oku Hidehisa and Shoichiro Fujisawa : Difference in Road Surface Recognition by Disease and Grades of The Low Vision, Assistive Technology Research Series, Vol.33, 988-993, 2013. (Summary) In our previous studies, Lateral Bands that were placed in both side of Tactile Walking Surface Indicators, and the result of clinical testing of Lareral Bands indicated the effectiveness for the Low Vison to show walking way. In this paper, relation between visibility and miss-recognition was studied from the different point of view in date of the previous study. Influence both by the difference in visual impairment and the difference in grades of disability was also studied. As the results, it was suggested that 30% of luminance contrast was the optimum value for both keeping visibility of Tactile Walking Surface Indicators with Lateral Bands and producing no miss-recognition. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-304-9-988 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.3233/978-1-61499-304-9-988 (DOI: 10.3233/978-1-61499-304-9-988)
26.	Ikeda Norihiro, Takahashi Kazuya, Yamamoto Genji, Kimura Yuki, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Verification of LED Blocks used at Crosswalk Entrances for Persons with Visually Impairment, Assistive Technology Research Series, Vol.33, 982-987, 2013. (Summary) The eyesight of a person with low visual capacity (LV) might decrease remarkably under low-light conditions such as the morning, evening, and nighttime, decreasing their opportunities to go out. Research and development underway to ensure safe walking for LVs examined a walking guidance system in which LED blocks are embedded into the road at edges of warning blocks installed at crosswalk entrances. The LED block can be detected with the LVs residual vision. The detectability of this LED block was evaluated by subjective experiments performed by visually impaired and blind persons. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-304-9-982 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84889075823 (DOI: 10.3233/978-1-61499-304-9-982, Elsevier: Scopus)
27.	Maeno Tetsuya, Shoichiro Fujisawa, Shin-ichi Ito, Katsuya SATO, Ogawa Takehiro and Ishimoto Hiroh : Research on the Occupational Ability Evaluation Technique in the Group Work of Intellectually/Mentally Handicapped Persons by MODAPTS Method, Assistive Technology Research Series, Vol.33, 970-975, 2013. (Summary) The first objective is to analyze the characteristics of the intellectually/mentally disabled more deeply in order to help the government and companies to understand them and the employment rate to increase. The second objective is to review the work evaluation method of the intellually/mentally disabled anew through this evaluation in order to trigger the research on the intellectually/mentally disabled to be activated. The result of the verification performed by this research has showed that the success or failure in a continuous company employment is more significantly related to the factors of ``surrounding healthy persons'' which are external factors than the factors arising from the disability of a disabled person. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-304-9-970 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.3233/978-1-61499-304-9-970 (DOI: 10.3233/978-1-61499-304-9-970)
28.	Shoichiro Fujisawa, Miyazaki Tatsuya, Shin-ichi Ito and Katsuya SATO : Continuity of Tactile Walking Surface Indicators and Audible Pedestrian Signals at Crosswalks, Assistive Technology Research Series, Vol.33, 647-652, 2013. (Summary) Crossing an intersection is one of the most risky actions for a visually impaired person. A visually impaired pedestrian is guided to the crosswalk entrance by the tactile walking surface indicators "TWSIs". It is then important that he/she safely and smoothly cross the intersection using the audible pedestrian signal. However, neither connectivity nor the continuity between the TWSIs and the audible pedestrian signal travel support systems has been verified. The purpose of this research is to verify this connectivity and continuity. It should be possible to acquire basic scientific data for developing guidelines from the findings of this research. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-304-9-647 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84889022133 (DOI: 10.3233/978-1-61499-304-9-647, Elsevier: Scopus)
29.	Shin-ichi Ito, Yasue Mitsukura, Takafumi Saito, Katsuya SATO and Shoichiro Fujisawa : Visualization Method to Confirm Relationships among Optimal Solutions, INFORMATION, Vol.16, No.7(B), 4893-4906, 2013. (Summary) This paper proposes method to visualize the relationship between the gene and objective values of all individuals in a Pareto solution. The gene and objective values are expressed as color and gray scales, respectively. The rules of visualization apply three normalization techniques for coloring the gene values and the objective function values, respectively. The gene values normalize using maximum and minimum values over all gene of all suboptimal solutions, in each gene and in each individual, respectively. The objective values normalize using maximum and minimum values in each objective function. We define the visualization space based on the visualization rules. The information visualization technique in this paper has the advantage of indicating the Pareto solution and its details in one frame. To show the effectiveness of the proposed method, we apply the proposed method to benchmark problems. We found that it is possible to confirm the Pareto solution, its details and relationships among those easily in one frame. (Keyword) optimization / Information Visualization (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84886892577 (Elsevier: Scopus)
30.	Yoshiaki IWADATE, Chika OKIMURA, Katsuya SATO, Yuta NAKASHIMA, Masatsune TSUJIOKA and Kazuyuki MINAMI : Myosin-II-mediated directional migration of dictyostelium cells in response to cyclic stretching of substratum, Biophysical Journal, Vol.104, No.4, 748-758, 2013. (Summary) Living cells are constantly subjected to various mechanical stimulations, such as shear flow, osmotic pressure, and hardness of substratum. They must sense the mechanical aspects of their environment and respond appropriately for proper cell function. Cells adhering to substrata must receive and respond to mechanical stimuli from the substrata to decide their shape and/or migrating direction. In response to cyclic stretching of the elastic substratum, intracellular stress fibers in fibroblasts and endothelial, osteosarcoma, and smooth muscle cells are rearranged perpendicular to the stretching direction, and the shape of those cells becomes extended in this new direction. In the case of migrating Dictyostelium cells, cyclic stretching regulates the direction of migration, and not the shape, of the cell. The cells migrate in a direction perpendicular to that of the stretching. However, the molecular mechanisms that induce the directional migration remain unknown. Here, using a microstretching device, we recorded green fluorescent protein (GFP)-myosin-II dynamics in Dictyostelium cells on an elastic substratum under cyclic stretching. Repeated stretching induced myosin II localization equally on both stretching sides in the cells. Although myosin-II-null cells migrated randomly, myosin-II-null cells expressing a variant of myosin II that cannot hydrolyze ATP migrated perpendicular to the stretching. These results indicate that Dictyostelium cells accumulate myosin II at the portion of the cell where a large strain is received and migrate in a direction other than that of the portion where myosin II accumulated. This polarity generation for migration does not require the contraction of actomyosin. (Keyword) Adenosine Triphosphate / Animals / Cell Movement / Cytoplasmic Streaming / Dictyostelium / Green Fluorescent Proteins / Hydrolysis / Mutation / Myosin Type II / Pseudopodia / Stress, Mechanical (Link to Publication Site) ● Publication site (DOI): 10.1016/j.bpj.2013.01.005 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 23442953 ● Search Scopus @ Elsevier (PMID): 23442953 ● Search Scopus @ Elsevier (DOI): 10.1016/j.bpj.2013.01.005 (DOI: 10.1016/j.bpj.2013.01.005, PubMed: 23442953)
31.	Shin-ichi Ito, Msashi Hamaguchi, Katsuya SATO and Shoichiro Fujisawa : Analysis of Individual Difference in EEG using Self-organizing Map, Journal of Life Support Engineering, Vol.24, No.4, 153-158, 2012. (Summary) This paper introduces a method to analyze an individual difference in an electroencephalogram (EEG) using a self-organizing map (SOM). The EEG recording position is a left prefrontal pole (Fp1) in the international 10-20 system. The device for recording the EEG uses dry-type sensor and a small number of electrodes. The EEG data is analyzed through the FFT and EEG features are extracted by calculating the time average of the power spectrum of five frequency bands which are theta, low-alpha, high-alpha, low-beta and high-beta, respectively. In order to confirm the individual difference in the EEG, the EEG patterns are classified using the SOM. The EEG patterns are based on human responses on sounds listened to. Finally, we conduct experiments using real EEG data. The experimental results suggest that it is possible to express the individual differences in the EEG using SOM. (Keyword) electroencephalogram / interindividual difference / self-organizing map / information visualization (Link to Publication Site) ● Publication site (DOI): 10.5136/lifesupport.24.153 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679343390976 ● Search Scopus @ Elsevier (DOI): 10.5136/lifesupport.24.153 (DOI: 10.5136/lifesupport.24.153, CiNii: 1390282679343390976)
32.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Interindividual Difference Analysis in Prefrontal Cortex EEGs Based on the Relationship with Personality, Journal of Signal Processing, Vol.16, No.5, 443-450, 2012. (Summary) In this study, we propose a method to analyse interindividual differences in electroencephalograms (EEGs) taken while a subject listened to music, which is based on the relationship of these EEGs to human personality. The frequencies of the EEGs that are analysed have components that contain both significant and immaterial information as well as different levels of importance. We express the different levels of importance through the weight values of frequencies using a real-coded genetic algorithm. Then, the EEG patterns, which are determined based on the evaluation of the impression on the music, are detected using the $k$-nearest neighbour method. We assume that differences between detection results for EEG patterns with the highest and lowest recognition accuracies show interindividual differences. Moreover, ego analysis based on psychological testing is used to analyse personality, and the ego score is determined using a questionnaire. Finally, we discuss the relationship between personality and interindividual differences observed in experimental EEGs. An interesting tendency of a person with a combined ego type is that he or she has a unique response to negative stimuli compared with that of positive stimuli. (Keyword) electroencephalogram / interindividual difference / personality / egogram (Link to Publication Site) ● Publication site (DOI): 10.2299/jsp.16.443 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001204465273600 ● Search Scopus @ Elsevier (DOI): 10.2299/jsp.16.443 (DOI: 10.2299/jsp.16.443, CiNii: 1390001204465273600)
33.	上田喜敏, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Lower back pain survery during care work and Bed care load assessment, 福祉のまちづくり研究, Vol.14, No.2, 9-17, 2012. (Summary) We conducted a questionnaire about lower-back-pain to the participants at the Toyama lower-back-pain measure promotion study session (1925 persons). The question asked the presence of lower back pain and investigated what kind of lower back pain they had in respect of a care work place. Furthermore, the IEMG and the breathing gas analyzing apparatus analyzed the weight load (10kg) in the position which changed the height in the bed depended for lifting. About 60 percent of caregivers had a lower-back-pain person by a caregiver. When the persons who had lower back pain in the past were included, about 80 percent of them had lower back pain. Caregivers often felt lower back pain when engaging in care work at the bedside. The causation of the onset of chronic lower back pain was "the work which kept their body with half-sitting posture for a long time." In care work with a bed, work in the height of the waist reduced the load for a line active mass and breathing gas volume. The present care work had the high risk of causing lower back pain. To decrease the risk, the care worker should do bed care work at the height of the waist. This result should be adopted as a job standard. (Keyword) 介助作業場 / ベッド介助 / 筋電計 / 呼気ガス / 作業標準 / Care work place / Care work place / Bed care / Bed care / Electromyograph / Electromyograph / Breathing gas / Breathing gas / Job standard / Job standard (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680228340864 (CiNii: 1390282680228340864)
34.	TANAKA Takayuki, NORIMURA Ippei, Katsuya SATO and MINAMI Kazuyuki : Evaluation of the dependence of tensile strength and fracture strain of PLA film on machining method, Transactions of The Japan Society of Mechanical Engineers, Series C, Vol.78, No.786, 707-716, 2012. (Keyword) Micromachining / Biomaterial / Poly Lactic Acid Film / Material Testing / Strength (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaic.78.707 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1573668926264832512 ● Search Scopus @ Elsevier (DOI): 10.1299/kikaic.78.707 (DOI: 10.1299/kikaic.78.707, CiNii: 1573668926264832512)
35.	Matsubara Kayoko, Hamada Takamaro, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Oku Hidehisa and Shoichiro Fujisawa : Mis-recognition of Road Surface by The Low Vision, Assistive Technology Research Series, Vol.29, 610-617, 2011. (Summary) The low vision sometimes miss-recognize road surface as holes or ditches. The purpose of our research is to find parameters of road surface that causes this kind of miss-recognition. As the preliminary result of our research, this paper describes how the low vision recognizes road surface incorrectly. Fifty-nine low vision persons were participated as subjects in these experiments. Visibility of road surface's line that have different parameters in width, luminance contrast, and illumination was experimentally studied. One of the three experiment, eight lines that have different parameters respectively were showed to a subject at a time. The lines were arranged in ascending order. At the end of each experiment, comments from a subject were obtained. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-60750-814-4-610 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84865526906 (DOI: 10.3233/978-1-60750-814-4-610, Elsevier: Scopus)
36.	Shinji Takahashi, Akifumi Miyake, Shin-ichi Ito, Katsuya SATO, Masayuki Booka and Shoichiro Fujisawa : An evaluation of tactile walking surface indicators for the visually impaired, Assistive Technology Research Series, Vol.29, 587-594, 2011. (Summary) Tactile Walking Surface Indicators (TWSIs) are a vital walking aid for the visually impaired, especially those with complete blind person, but the blocks are still not available on all walkways. This study was performed with visually inpaired person to determine to what degree TWSI (in particular, blocks with raised parts to indicate caution) contribute to direction determination, with the goal of improving the utility of TWSIs. By comparing drift after 5m of straight line travel, significant differences were seen between the existence and nonexistence of border elevation for both square and zigzag patterns, confirming that determining direction when using square patterns over zigzag patterns. (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-60750-814-4-587 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84865482619 (DOI: 10.3233/978-1-60750-814-4-587, Elsevier: Scopus)
37.	南和幸, 入口太地, 李井山, 中村敬子, 山内秀一, Katsuya SATO, 岡田宗正 and 松永尚文 : Development of a flexible microprobe using strip line structure for MR Imaging, Transactions of the Japanese Society for Medical and Biological Engineering, Vol.48, No.3, 248-258, 2010. (Summary) Inspection by the MRI is also thought to be promising as well as the supersonic catheter and so on for the details inspection of the plaque inside the blood vessel wall. MR probe that can detect MR signal in just near the lesion site is necessary to observe it about 2 mm deep with high resolution. In this research, we have developed MR microprobes that have a shielded-loop type coil of which change in <i>Q</i>-value by the load is small. The shielded-loop was made by using strip line. It is flexible because it is made by stacking the thin films on which the wiring is formed. The coil part of this microprobe can be rolled into compact size and can be inserted into a catheter. Its coil expands outside of the catheter and can be used for imaging large area. We designed and made the microprobes and measured their fundamental electrical characteristics. Then, they were tested by using MR scanner and the resolution of MR images were evaluated. The thin microprobe that could be inserted into the 6 Fr (1 Fr = Ø0.33 mm) catheter was made and evaluated. Its <i>Q</i>-value was 22.7, and the resolution of MR image was 160 <I>μ</I>m when sample was kiwi fruit. (Keyword) MR imaging / microprobe / flexible coil / strip line / loop coil (Link to Publication Site) ● Publication site (DOI): 10.11239/jsmbe.48.248 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282680244710016 ● Summary page in Scopus @ Elsevier: 2-s2.0-79953861253 (DOI: 10.11239/jsmbe.48.248, CiNii: 1390282680244710016, Elsevier: Scopus)
38.	Katsuya SATO, Satoshi Kamada and Kazuyuki Minami : Development of microstretching device to evaluate cell membrane strain field around sensing point of mechanical stimuli, International Journal of Mechanical Sciences, Vol.52, No.2, 251-256, 2010. (Link to Publication Site) ● Publication site (DOI): 10.1016/j.ijmecsci.2009.09.021 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1016/j.ijmecsci.2009.09.021 (DOI: 10.1016/j.ijmecsci.2009.09.021)
39.	Katsuya SATO, 下野晃裕, 鎌田慧 and 南和幸 : 高時間・空間分解能観察に対応する新規な細胞伸展マイクロデバイスの開発, Transactions of The Japan Society of Mechanical Engineers, Series C, Vol.74, No.746, 2535-2541, 2008. (Summary) In this study, we have developed a novel cell stretching micro device to observe cellular response to mechanical stimuli with high spatial and temporal resolution. In conventional cell stretching device, rigid displacement of cell body during stretching operation is not negligible. And this rigid displacement makes it difficult to observe instant initial cellular response to stretching. The novel micro device is fabricated by applying MEMS technique, and consists of a transparent elastic micro chamber and a micro linkage mechanism. The micro chamber and linkage mechanism is fabricated by micro molding and multiple exposure technique of photoresist, respectively. We demonstrated availability of fabrication process, and evaluated performance of the micro device. When applying a stretch to chamber, rigid displacement was well suppressed. This result indicated a potential of this device to observe instant initial cellular response to stretching mechanical stimuli. (Keyword) Biomechanics / MEMS / Medical Engineering / Mechanical Stimulation (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaic.74.2535 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1520572358025426432 ● Summary page in Scopus @ Elsevier: 2-s2.0-58249109637 (DOI: 10.1299/kikaic.74.2535, CiNii: 1520572358025426432, Elsevier: Scopus)
40.	Taiji ADACHI, Katsuya SATO, Norio HIGASHI and Yoshihiro TOMITA : Simultaneous observation of calcium signaling response and membrane deformation due to localized mechanical stimulus in single osteoblast-like cells, Journal of the Mechanical Behavior of Biomedical Materials, Vol.1, No.1, 43-50, 2008. (Summary) Biochemical signals related to a mechanosensory mechanism by which cells sense mechanical stimuli have been gradually clarified by biological approaches such as blocking specific signaling pathways; however, mechanical signals such as deformation/strain, which is transduced into biochemical signals through this mechanism, particularly at the cellular structural component level in a single cell, have not yet been clearly understood. This in vitro study focuses on an intracellular calcium signaling response to an applied localized deformation in a single osteoblast-like MC3T3-E1 cell, and observed localized deformation of a cell membrane and the calcium ion flux from an extracellular medium. The localized deformation was applied to a cell by indenting a microsphere onto the cell membrane using a glass microneedle. The cellular calcium signaling response and cell membrane deformation were simultaneously observed using fluorescent dyes in a vertical section under a confocal laser-scanning microscope with high spatial and temporal resolutions. Our results observed in the vertical section showed that the initiation point of the calcium ion flux is collocated at the displaced microsphere around which stretch membrane deformation was observed. (Keyword) Animals / Calcium / Calcium Signaling / Cell Line / Elastic Modulus / Mechanotransduction, Cellular / Membrane Fluidity / Mice / Osteoblasts / Physical Stimulation / Stress, Mechanical (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jmbbm.2007.06.003 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 19627770 ● Search Scopus @ Elsevier (PMID): 19627770 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jmbbm.2007.06.003 (DOI: 10.1016/j.jmbbm.2007.06.003, PubMed: 19627770)
41.	Katsuya SATO, Taiji ADACHI, Yasuhito SHIRAI, Naoaki SAITO and Yoshihiro TOMITA : Local disassembly of actin stress fibers induced by selected release of intracellular tension in osteoblastic cell, Journal of Biomechanical Science and Engineering, Vol.1, No.1, 204-214, 2006. (Summary) In adherent cells, such as osteoblasts and endothelial cells, the actin stress fiber structure is dynamically reorganized under changes in the surrounding mechanical environment such as cyclic stretch deformation or extracellular fluid flow. Although many studies have been conducted to clarify the biochemical signaling pathways in the reorganization process, details of the reorganization mechanism are still not clearly understood. In addition, to known biochemical mediators, intracellular tension has been proposed as a candidate mechanical mediator for stress fiber reorganization. In previous studies, it was reported that the release of intracellular tension by contracting the cell body induced the disassembly of the stress fiber as an initial phase of the reorganization process. However, in these experimental systems, deformation or force was applied to the entire cell body, so that it was difficult to directly discuss the relationship between the individual mechanical condition of stress fibers and the disassembling phenomenon. In this study, we have designed a novel experimental system by which local contraction was applied to a single osteoblast-like cell and intracellular tension in the targeted stress fiber was selectively released. The dynamic change in stress fiber structure was observed in the EGFP-tagged actin expressed osteoblast-like cell MC3T3-E1. The results indicated that only tension-released stress fibers were selectively disassembled and disappeared in a single cell. This result suggests that the existence of intracellular tension is essential for the dynamical stability of the stress fibers in osteoblast-like cells. (Keyword) Osteoblastic Cell / Cytoskeleton / Intracellular Tension / Actin Stress Fiber / Structure Reorganization (Link to Publication Site) ● Publication site (DOI): 10.1299/jbse.1.204 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205261999616 ● Search Scopus @ Elsevier (DOI): 10.1299/jbse.1.204 (DOI: 10.1299/jbse.1.204, CiNii: 1390001205261999616)
42.	Katsuya SATO, Taiji ADACHI, Daisuke UEDA, Masaki HOJO and Yoshihiro TOMITA : Measurement of local strain on cell membrane at initiation point of calcium signaling response to applied mechanical stimulus in osteoblastic cells., Journal of Biomechanics, Vol.40, No.6, 1246-1255, 2006. (Summary) In adaptive bone remodeling, it is believed that bone cells such as osteoblasts, osteocytes and osteoclasts can sense mechanical stimuli and modulate their remodeling activities. However, the mechanosensing mechanism by which these cells sense mechanical stimuli and transduce mechanical signals into intracellular biochemical signals is still not clearly understood. From the viewpoint of cell biomechanics, it is important to clarify the mechanical conditions under which the cellular mechanosensing mechanism is activated. The aims of this study were to evaluate a mechanical condition, that is, the local strain on the cell membrane, at the initiation point of the intracellular calcium signaling response to the applied mechanical stimulus in osteoblast-like MC3T3-E1 cells, and to investigate the effect of deformation velocity on the characteristics of the cellular response. To apply a local deformation to a single cell, a glass microneedle was directly indented to the cell and moved horizontally on the cell membrane. To observe the cellular response and the deformation of the cell membrane, intracellular calcium ions and the cell membrane were labeled using fluorescent dyes and simultaneously observed by confocal laser scanning microscopy. The strain distribution on the cell membrane attributable to the applied local deformation and the strain magnitude at the initiation point of the calcium signaling responses were analyzed using obtained fluorescence images. From two-dimensionally projected images, it was found that there is a local compressive strain at the initiation point of calcium signaling. Moreover, the cellular response revealed velocity dependence, that is, the cells seemed to respond with a higher sensitivity to a higher deformation velocity. From the viewpoint of cell biomechanics, these results provide us a fundamental understanding of the mechanosensing mechanism of osteoblast-like cells. (Keyword) 3T3 Cells / Animals / Calcium Signaling / Cell Membrane / Computer Simulation / Elasticity / Mechanotransduction, Cellular / Membrane Fluidity / Mice / Micromanipulation / Models, Biological / Osteoblasts / Physical Stimulation / Stress, Mechanical / Viscosity (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jbiomech.2006.05.028 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 16887125 ● Search Scopus @ Elsevier (PMID): 16887125 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jbiomech.2006.05.028 (DOI: 10.1016/j.jbiomech.2006.05.028, PubMed: 16887125)
43.	Katsuya SATO, Taiji ADACHI, Mamoru MATSUO and Yoshihiro TOMITA : Quantitative evaluation of threshold fiber strain that induces reorganization of cytoskeletal actin fiber structure in osteoblastic cells., Journal of Biomechanics, Vol.38, No.9, 1895-1901, 2005. (Summary) The cytoskeletal stress fiber structure plays essential roles in various kinds of cellular functions such as shape maintenance, active motility and mechanosensing, and its structure is dynamically reorganized under each functional process. In known reorganization mechanisms of the stress fibers, a change in its mechanical condition has been suggested as one of the key mediators that affect the reorganization process. Some experimental studies have clarified that tension release in the stress fibers induces fiber depolymerization that is considered to be the initial phase of the reorganization process. However, quantitative mechanical values such as strain or stress that induce depolymerization have still not been evaluated. This study is aimed at the quantitative evaluation of the mechanical value that induces stress fiber depolymerization, to gain a basic understanding of the reorganization phenomenon from a mechanical viewpoint. Osteoblastic cells (MC3T3-E1) were cultured on prestretched silicone rubber substrate. Compressive deformation was applied to the cells by uniaxially releasing the prestretched substrate strain and change in the stress fiber structure was observed. The results indicated that the compressive strain magnitude, not in the whole cell body but in the stress fiber itself, is important to induce disassembly of the stress fiber structure. The existence of a threshold strain magnitude for initiating fiber disassembly was also suggested; the threshold strain magnitude was evaluated as approximately -0.20. (Keyword) Animals / Anisotropy / Cell Culture Techniques / Cytoskeleton / Differential Threshold / Elasticity / Equipment Design / Equipment Failure Analysis / Image Interpretation, Computer-Assisted / Mechanotransduction, Cellular / Mice / Microfilaments / NIH 3T3 Cells / Osteoblasts / Protein Conformation / Quantitative Structure-Activity Relationship / Stress, Mechanical (Link to Publication Site) ● Publication site (DOI): 10.1016/j.jbiomech.2004.08.012 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 16023478 ● Search Scopus @ Elsevier (PMID): 16023478 ● Search Scopus @ Elsevier (DOI): 10.1016/j.jbiomech.2004.08.012 (DOI: 10.1016/j.jbiomech.2004.08.012, PubMed: 16023478)
44.	安達泰治, 河東万智子, Katsuya SATO and 田川雅人 : 細胞接着マイクロパターニングとアクチン細胞骨格の配向制御, Journal of the Japanese Association for Crystal Growth, Vol.31, No.1, 78-82, 2004.
45.	安達泰治, 梶田文昭, Katsuya SATO, 松本康志 and 田川雅人 : Cell Micro-Patterning by Atom Beam Exposure, Transactions of The Japan Society of Mechanical Engineers, Series A, Vol.69, No.688, 118-124, 2003. (Summary) This study aimed to develop a new cell micro-patterning method by controlling material surface affinity of the cell using atomic oxygen beam exposure. Surfaces of low-density polyethylene (LDPE) and tetrafluoroethylene-hexafluoropropylene (FEP) were exposed to the atomic oxygen beam. On the LDPE surface, the roughness measured by atomic force microscopy (AFM) did not change much, however, the oxygen concentration on the surface measured by X-ray photoelectron spectroscopy (XPS) significantly increased that resulted in increase in wettability. Contrary to this, on the FEP surface, the oxygen concentration showed no significant change, but roughness of the surface remarkably increased and the wettability decreased. As a result of the surface modification, affinity of the osteoblastic cells on the FEP surface increased, which was also confirmed by increase in the cell area. Finally, cell micro-patterning on the FEP surface was carried out based on difference in the affinity between modified and unmodified surfaces patterned by a masking method. (Keyword) Cell Micro-Patterning / Atom Beam / Surface Modification / Cell Adhesion / Biomaterials / Biomechanics (Link to Publication Site) ● Publication site (DOI): 10.1299/kikaia.69.1782 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390282679456282624 ● Summary page in Scopus @ Elsevier: 2-s2.0-1442339220 (DOI: 10.1299/kikaia.69.1782, CiNii: 1390282679456282624, Elsevier: Scopus)
46.	Katsuya SATO, 西島尚吾, 安達泰治 and 冨田佳宏 : Role of the Organized Cytoskeletal Actin Fiber Structure in Osteoblastic Response to Mechanical Stimulus, Transactions of the Japanese Society for Medical and Biological Engineering, Vol.41, No.4, 449-457, 2003. (Summary) Bone responds to change in mechanical environment and adaptively remodels the internal structure and external shape. Therefore, for bone cells, such as bone-forming osteoblasts, a mechanical stimulus as well as biochemical signaling plays an important role in the regulation of their activities. Many studies on various osteoblastic responses to mechanical stimulus have been reported ; however, the mechanosensory mechanism by which cells sense the stimulus and translate it to biochemical signaling is not clearly understood. Cytoskeletal actin fibers have been proposed as one of the candidates playing an important role in the mechanosensory mechanism. In this study, we hypothesize that the organized network structure of actin fibers is essential in the mechanosensory mechanism. Three groups of osteoblas-like cells with different amounts of controlled actin fiber structure were prepared by controlling polymerization time after treatment with cytochalasin D. By applying mechanical stimulus to a single osteoblast-like cell, as localized deformation of the cytomembrane by direct indentation with a glass microneedle, a calcium signaling response to the stimulus was observed using a fluorescent calcium indicator, Fluo 4, under a confocal laser-scanning microscope. As a result, cells responded more sensitively to the applied deformation with a larger amount of actin fiber structure, and a few cells without an organized structure responded to stimulus as well. These results suggest that the organized actin fiber structure is not necessarily essential in the mechanism by which the mechanical stimulus is transduced into a calcium signaling response, but plays a supporting role indirectly, such as improving the efficiency of transmitting the stimulus to the cell or amplifying the stimulus itself. (Link to Publication Site) ● Publication site (DOI): 10.11239/jsmbe2002.41.449 (Link to Search Site for Scientific Articles) ● CiNii @ National Institute of Informatics (CRID): 1390001205268272640 ● Search Scopus @ Elsevier (DOI): 10.11239/jsmbe2002.41.449 (DOI: 10.11239/jsmbe2002.41.449, CiNii: 1390001205268272640)
47.	Taiji ADACHI, Katsuya SATO and Yoshihiro TOMITA : Directional dependence of osteoblastic calcium response to mechanical stimuli., Biomechanics and Modeling in Mechanobiology, Vol.2, No.2, 73-82, 2003. (Summary) In adaptive bone remodeling, mechanical signals such as stress/strain caused by loading/deformation are believed to play important roles as regulators of the process in which osteoclastic resorption and osteoblastic formation are coordinated under a local mechanical environment. The mechanism by which cells sense and transduce mechanical signals to the intracellular biochemical signaling cascade is still unclear, however to address this issue, the present study investigated the characteristic response of a single osteoblastic cell, MC3T3-E1, to a well-defined mechanical stimulus and the involvement of the cytoskeletal actin fiber structure in the mechanotransduction pathway. First, by mechanically perturbing to a single cell using a microneedle, a change in the intracellular calcium ion concentration [Ca(2+)](i) was observed as a primal signaling response to a mechanical stimulus, and the threshold value of the perturbation as the mechanical stimulus was evaluated quantitatively. Second, to study directional dependence of the response to the mechanical stimulus, the effect of actin fiber orientation on the threshold value of the calcium response was investigated at various magnitudes and directions of the stimulus. It was found that the osteoblastic response to the perturbation exhibited a directional dependence. That is, the sensitivity of osteoblastic cells to a mechanical stimulus depends on the angle of the applied deformation with respect to the cytoskeletal actin fiber orientation. This finding is phenomenological evidence that cytoskeletal actin fiber structures are involved in the mechanotransduction mechanism, which may be related to cell polarization behaviors such as cellular alignment caused by mechanical stimulation. (Keyword) Animals / Calcium / Calcium Signaling / Cell Culture Techniques / Cell Line / Cell Polarity / Cytoskeleton / Mechanotransduction, Cellular / Mice / Microfilaments / Micromanipulation / Osteoblasts / Physical Stimulation / Stress, Mechanical (Link to Publication Site) ● Publication site (DOI): 10.1007/s10237-003-0029-0 (Link to Search Site for Scientific Articles) ● PubMed @ National Institutes of Health, US National Library of Medicine (PMID): 14586810 ● Search Scopus @ Elsevier (PMID): 14586810 ● Search Scopus @ Elsevier (DOI): 10.1007/s10237-003-0029-0 (DOI: 10.1007/s10237-003-0029-0, PubMed: 14586810)

Academic Paper (Unrefereed Paper):

1.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : Orientation analysis of collagen fibers in healing tendon by using second-harmonic-generation microscopy, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.10069, 1006909, 2017. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2251111 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85020294503 (DOI: 10.1117/12.2251111, Elsevier: Scopus)

Academic Letter:

1.	Kyohei Hirono, Tatsuya Miyazaki, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Research on continuity among assistive devices for personal mobility of visually impaired persons around crossings, Assistive Technology Research Series, Vol.35, 435-436, 2014. (Summary) Tactile walking-surface indicators (TWSIs) are necessary for visually impaired persons to walk independently. Audible pedestrian signals are also necessary for them to cross intersections. TWSIs support approaching the intersection, and audible pedestrian signals support crossing the intersection. However, the support of audible pedestrian signals may not necessarily be related to the support of the TWSIs. This research sought to verify how visually impaired persons are guided by different positions where the audible pedestrian signals are set up. (Keyword) visually impaired person / Tactile Walking Surface Indicator / audible pedestrian signal (Link to Publication Site) ● Publication site (DOI): 10.3233/978-1-61499-403-9-435 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84902257466 (DOI: 10.3233/978-1-61499-403-9-435, Elsevier: Scopus)

Review, Commentary:

1.	Eiji Hase, Takeo Minamikawa, Takahiko Mizuno, Katsuya SATO, Yoshiaki Nakajima, 浅原彰文, Kaoru Minoshima, Yasuhiro Mizurani, Tetsuo Iwata, Hirotsugu Yamamoto and Takeshi Yasui : スキャンレス光コム顕微鏡~光コムを用いたスキャンレス共焦点位相イメージング~, JAPANESE JOURNAL OF OPTICS, Vol.48, No.6, 227, Jun. 2019.
2.	Eiji Hase, Takeo Minamikawa, Takahiko Mizuno, Katsuya SATO, Yoshiaki Nakajima, 浅原彰文, Kaoru Minoshima, Yasuhiro Mizurani, Tetsuo Iwata, Hirotsugu Yamamoto and Takeshi Yasui : 光コムを用いたスキャンレス共焦点位相イメージング, JAPANESE JOURNAL OF OPTICS, Vol.48, No.6, 227, Jun. 2016.

Proceeding of International Conference:

1.	Tsuyoshi Takashina, Hayata Tadamasa, Katsuya SATO, Takeshi Yasui and Takeo Minamikawa : Molecular analysis of intracellular lipid droplets produced by fatty acid uptake by using Raman spectroscopy, The 12th Asia-Pacific Laser Symposium (APLS 2023), PGTu-07, Hakodate, Sep. 2023.
2.	Katsuya SATO : Calcium signaling response of osteoblasts under microvibration stimuli, 9th World Congress of Biomechanics 2022, O-02034, Jul. 2022.
3.	Shoichiro Fujisawa, Okada Tomohiro, Kihara Taiki, Nagahama Hideaki, Inagaki Tomoyuki, Ikeda Norihiro, Takahashi Kazuya, Takeuchi Kiyohito, Ogino Hiroshi, Shin-ichi Ito, Katsuya SATO and Osamu Sueda : Verification of blinking LED block installed at crosswalk entrance for low-vision people, Proceedings of the AHFE 2018 International Conference on Human Factors in Transportion, 615-622, Orlando, Jul. 2018. (Summary) There are individual differences in the degree of disorder and appearance of low vision people, but in many cases discrimination of light and darkness is possible. Therefore, it is considered effective to use flashing light as support for low vision people. As support for such low vision, research is being conducted in this laboratory to introduce a light emitting blinking block at the entrance to the pedestrian crossing. In this study, as an introduction study of the development of luminescent block for support to amblyopia, we asked subjects to evaluate the intensity of blinking stimulus when presenting blinking light to subjects and the goodness of visibility by sensory evaluation, Consider the blinking method best suited for support. (Keyword) LED block / Blind person / Crosswalk / Orientation / Veering distance / Tactile walking surface indicators (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-93885-1_56 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85049689281 (DOI: 10.1007/978-3-319-93885-1_56, Elsevier: Scopus)
4.	Katsuya SATO, Ryuta YASUI, Tasuku NAKAHARA and Kazuyuki MINAMI : Different characteristics of calcium signaling response between needle indentation stimuli and substrate stretching stimuli in osteoblasti cell, 8th World Congress of Biomechanics (WCB2018), Jul. 2018.
5.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : Quantitative evaluation of healing degree in injured tendons based on orientation analysis of collagen fibers by using Fourier-transform second-harmonic-generation microscopy and its relationship to mechanical property, Proceedings of SPIE, Vol.10711, 10711-26, Yokohama, Apr. 2018. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2318673 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85049237183 (DOI: 10.1117/12.2318673, Elsevier: Scopus)
6.	Katsuya SATO, Eiji Hase, Takeo Minamikawa and Takeshi Yasui : Quantitative in situ time-series evaluation of osteoblastic collagen synthesis under cyclic strain using second-harmonic-generation microscopy, Proceedings of SPIE, Vol.10711, 107110Z, Yokohama, Apr. 2018. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2316607 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85049249619 (DOI: 10.1117/12.2316607, Elsevier: Scopus)
7.	Shoichiro Fujisawa, Ranmaru Mandai, Ryota Kurozumi, Shin-ichi Ito and Katsuya SATO : Identification of Visually Impaired Person with Deep Learning, Proceedings of the 1st International Conference on Intelligent Human Systems Integration (iHSI 2018), 601-606, Dubai, Jan. 2018. (Summary) The purpose of this study is to identify visually impaired persons by analyzing still pictures of walking of a visually impaired person and that of a healthy person using deep learning. Still images of walking are taking still pictures from video images. Shoot from sideways and diagonally with two video cameras. The number of images (with 1000 or 2000) and the dropout (three, two, or one time) was changed and analyzed. Because the study focused on only visually impaired persons (totally blind persons) and the healthy person's study machines of two patterns in the experiment, a correct answer rate of 99.9% for every 2000 images and 2 times of the dropout number was obtained. (Keyword) deep learning / Deep convolutional neural networks / Visually impaired person / Blind person (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-73888-8_93 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/978-3-319-73888-8_93 (DOI: 10.1007/978-3-319-73888-8_93)
8.	Katsuya SATO, Manabu KATAYAMA, Shoichiro Fujisawa, Tasuku NAKAHARA and Kazuyuki MINAMI : Video rate observation of intracellular calcium signaling response to uniaxial stretching stimuli in osteoblastic cell, ISB2017 full abstract book, Brisbane, Sep. 2017.
9.	Okada Tomohiro, Miyamoto Takashi, Shin-ichi Ito, Katsuya SATO, Ikeda Norihiro, Osamu Sueda and Shoichiro Fujisawa : Research on Blinking-Luminescence Travel Support for Visually Impaired Persons, Proceedings of the AHFE 2017 International Conference on Human Factors in Transportion, 319-324, Los Angeles, Jul. 2017. (Summary) Of the five human senses, vision is said to account for 80% of the in-formation acquired. The presentation of light is an effective way to convey visual information. A blinking presentation especially attracts attention. A low-vision person acquires peripheral information through residual vision. In this case, light effectively supports the travel of low-vision persons. A blinking light stimulates more than a continuous light. However, a blinking light is not sufficiently compatible with the surrounding environment. This research investigates an environmentally friendly blinking pattern to arouse attention. (Keyword) Low-vision / Visual information / coupled systems / Travel support / Sensory test / Brain waves (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-60441-1_32 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/978-3-319-60441-1_32 (DOI: 10.1007/978-3-319-60441-1_32)
10.	Tomoyuki Inagaki, Hideaki Nagahama, Norihiro Ikeda, Kazuya Takahashi, Kiyohito Takeuchi, Hiroshi Ogino, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : Verification of Installed Position of LED Block Equipped with Projections to Indicate Travel Direction, Proceedings of the AHFE 2017 International Conference on Human Factors in Transportion, 817-824, Los Angeles, Jul. 2017. (Summary) A crosswalk entrance is on the boundary of a roadway and is a dangerous area for visually impaired persons. Tactile walking surface indicators (TWSIs) are installed on the road to support independent travel for blind and low-vision individuals. We developed an LED block equipped with projections to strengthen support at the crosswalk entrance. Blind individuals can sense this block through the soles of their shoes. Results indicated that the LED block equipped with projections to locate travel direction effectively supports crossing. The effectiveness of this block is determined using measurement and questionnaire results. (Keyword) LED block / Blind person / Crosswalk / Orientation / Veering distance / Tactile walking surface indicators (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-60441-1_78 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/978-3-319-60441-1_78 (DOI: 10.1007/978-3-319-60441-1_78)
11.	Takeshi Yasui, Eiji Hase, Takeo Minamikawa and Katsuya SATO : In situ second-harmonic-generation imaging of collagen fibers produced by standing-cultured osteoblasts, Focus on Microscopy 2017, P1-E/7, Bordeaux, Apr. 2017.
12.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : Orientation analysis of collagen fibers in healing tendon by using second-harmonic-generation microscopy, SPIE Photonics West, Biomedical Optics (BiOS 2017), 10069-8, San Francisco, Feb. 2017. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2251111 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-85020294503 (DOI: 10.1117/12.2251111, Elsevier: Scopus)
13.	Nagahama Hideaki, Inagaki Tomoyuki, Ikeda Norihiro, Takahashi Kazuya, Takeuchi Kiyohito, Ogino Hiroshi, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : Proof Experiment of LED Block Equipped with Projections to Locate Travel Direction for Blind and Vision Impaired Persons, Proceedings of the AHFE2016 International Conference on Human Factors in Transportation, 159-169, Orlando, Jul. 2016. (Summary) The eyesight of a person with low visual capacity ("LV") might decrease remarkably under low-light conditions such as the morning, evening, and nighttime, decreasing their opportunities to go out. Crosswalk entrances are on the boundary with the roadway and are among the dangerous areas for visually impaired persons. An LV person cannot easily find the entrance of a crosswalk at nighttime. LV persons can detect the developed LED blocks with their residual vision. Moreover, for the blind person to cross the crosswalk safely, it is very important to acquire the direction at the soles of the shoes. The authors have verified the effectiveness of the developed block for visually impaired person by laboratory experiments. In this experiment, both visually impaired persons and blind persons found the developed block to effectively support crossing. Moreover, the time required for locating with the LED block was short . Orientation using the LED block required less time. The LED block was observed to have an orientation accuracy equivalent to that of TWSIs. Moreover, subjects expressed opinions such as "It was easy to locate" and "There is a sense of security when going straight" in interviews after the experiment. Installing LED blocks at crosswalk entrances was found to be useful for guiding visually impaired persons. Moreover, the shape of the projection indicating the direction is easily verified through the soles of the blind person's shoes. A LED block experiment was conducted to determine its actual efficiency. In this research, the visibility of the LED block was verified for different luminescence and illuminance environments. This result clarified how to provide illumination for a visually impaired person. Based on this research, the authors developed a LED block with projections to locate travel direction for a visually impaired person. The developed block can be detected with the LVs residual vision. Blind persons can also detect this block through the soles of their shoes. This block was constructed at the entrance to a crosswalk of an actual intersection, and a proof experiment was conducted. Twenty persons with weak sight and 20 totally blind people verified the effectiveness of this block. Especially, the effectiveness of the experiment on the LED block by the LVs can be verified by doing after the sunset. This experiment measured the visibility of the LED block at the pavement side and the opposite side. In the experiments with blind persons, the time to acquire the direction of the crossing from the direction location block and the veering distance at the crossing was measured to verify its effectiveness. Moreover, low-vision persons and totally blind persons answered a questionnaire concerning the effectiveness of the block. The effectiveness of this block is described from the measurement data and the questionnaire results. (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-41682-3_14 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/978-3-319-41682-3_14 (DOI: 10.1007/978-3-319-41682-3_14)
14.	Takahashi Shinji, Ishibashi Tatsuki, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : Quantitative Evaluation of Orientation Performance of Tactile Walking Surface Indicators for the Blind, Proceedings of the AHFE2016 International Conference on Human Factors in Transportation, 151-158, Orlando, Jul. 2016. (Summary) Tactile walking surface indicators (TWSIs) were invented in Japan in 1965. They are now used around the world to help visually impaired persons. There are two types of TWSIs, attention patterns and guiding patterns. TWSIs are perceived through use of a long white cane or through the soles of the shoes for the blind. The TWSI design of the attention pattern only calls attention to a hazard or to hazards and decision points. This attention pattern is usually constructed at the crosswalk entrance. The direction of the crossing can be acquired by the row of the projection of the attention pattern through the soles of the shoes. TWSIs must have high detection sensitivity and a high ability to distinguish objects as well as excellent direction detection. An international standard for TWSIs was enacted in 2012. However, the international standard organization (ISO) allows a wide-ranging size. The background that allowed the size with a wide-ranging ISO standard was in the adoption of various sizes by each country. For instance, the top diameter of attention patterns was specified as 12 to 25mm. The spacing was specified as 42 to 70mm. In addition, truncated domes or cones of the attention pattern were arranged in a square grid, parallel or diagonal at 45°to the principal direction of travel. This diagonal will not indicate the direction of the crossing. In this research, the performance of indicating the direction was compared at the same intervals for five diameters specified by the international standard. To secure omnidirectional performance, truncated domes were arranged on the disc. The subject enters the disc from a random direction and determines the direction of the row through the soles of their shoes. Five discs with different diameters were selected at random. The spacing of the truncated domes was assumed to be 60mm as adopted by the national standard of Japan (JIS). The experiment was performed by 20 people. For the five kinds of TWSLs, the direction was determined as the direction of the row at the rate from 43 to 54%. Other angles were all less than 7% at a resolution of 5°. The row of 45° forms the row at the spacing of the square root of two times. It was a result similar as for this row. It has been understood to have the orientation performance all five kinds of attention pattern with a different diameter. The attention pattern of JIS was the highest value. Though this experiment does not verify the orientation performance of the difference in spacing, the attention pattern of the diagonal means the performance is not used. The arrangement of JIS is square grid only. In this research, the orientation performance is quantitatively compared by the difference of the diameter. The purpose of this research is to acquire data as a scientific basis for improving the ISO standard. (Link to Publication Site) ● Publication site (DOI): 10.1007/978-3-319-41682-3_13 (Link to Search Site for Scientific Articles) ● Search Scopus @ Elsevier (DOI): 10.1007/978-3-319-41682-3_13 (DOI: 10.1007/978-3-319-41682-3_13)
15.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Mitsuhiko Takahashi and Takeshi Yasui : Observation of tendon repair in animal model using second-harmonic-generation microscopy, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.9712, 97121R, San Francisco, Feb. 2016. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2213890 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84975062041 (DOI: 10.1117/12.2213890, Elsevier: Scopus)
16.	Eiji Hase, Katsuya SATO and Takeshi Yasui : In situ visualization of collagen fiber produced by cultured osteoblasts using sensitive second-harmonic-generation microscopy equipped with a 10-fs mode-locked Ti:sapphire laser, CLEO Pacific Rim 2015, 26H3-5, Busan, Aug. 2015. (Link to Publication Site) ● Publication site (DOI): 10.1109/CLEOPR.2015.7376042 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84964068458 (DOI: 10.1109/CLEOPR.2015.7376042, Elsevier: Scopus)
17.	Eiji Hase, Katsuya SATO and Takeshi Yasui : In vivo visualization of collagen fiber produced by cultured osteoblasts using sensitive second-harmonic-generation microscopy equipped with a 10-fs mode-locked Ti:sapphire laser, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, Vol.9329, 93292Q, San Francisco, Mar. 2015. (Link to Publication Site) ● Publication site (DOI): 10.1117/12.2079114 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84932117224 (DOI: 10.1117/12.2079114, Elsevier: Scopus)
18.	Yuta NAKASHIMA, Tin YANG, Ryo MONJI, Kazuyuki MINAMI, Katsuya SATO and Yoshitaka NAKANISHI : Monitoring of Cellular Behavior to Receive Mechanical Stimulation Controlled by Microdevice, Proceedings of IEEE PEMC (16th International Power Electronics and Motion Control Conference and Exposition, 761-766, Sep. 2014. (Link to Publication Site) ● Publication site (DOI): 10.1109/EPEPEMC.2014.6980568 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84920510697 (DOI: 10.1109/EPEPEMC.2014.6980568, Elsevier: Scopus)
19.	Shoichiro Fujisawa, Norihiro Ikeda, Kazuya Takahashi, Tomoyuki Inagaki, Katsuya SATO, Shin-ichi Ito and Motohiro Seimiya : Research on identifying LED blocks mounted on crosswalk boundaries for persons with visually impairment, 5th International Conference on Applied Human Factors and Ergonomics 2014, Krakow, Jul. 2014.
20.	Kyohei Hirono, Tatsuya Miyazaki, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Research on continuity among assistive devices for personal mobility of visually impaired persons around crossings, Proc. of 5th Inernational Symposium on Advanced Control of Industrial Processes (ADCONIP 2014), 247-250, Hiroshima, May 2014.
21.	Nobuhisa Kuramoto, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Trigger Pattern Detection Method for Assisting in Ambulation Rehabilitation Based on EEG Analysis, Proc. of 21st IEEE International Symposium on Robot and Human Interactive Communication, Ro-Man2012, 646-652, France, Sep. 2012. (Summary) This paper proposes a method to detect the trigger pattern of walking motion from an electroencephalogram (EEG). Our final goal is to develop a rehabilitation assistance system that can assist in ambulation exercise and be used on a daily basis by watching for the patient's degree of functional recovery. Due to assist in ambulation rehabilitation, it needs to detect the feature signal related to the voluntary walking. As a first step, we detected an EEG feature pattern that has the potential to become the starting point of walking motion. The proposed method involves EEG recording, noise reduction, and EEG pattern classification. The EEG device had dry-type sensors and several electrodes with a headphone. Morphological filters were used to reduce EEG noise. The EEG patterns related to walking motion were classified using a support vector machine. To demonstrate the effectiveness of the proposed method, we conducted experiments using real EEG data. (Keyword) electroencephalogram / pattern classification (Link to Publication Site) ● Publication site (DOI): 10.1109/ROMAN.2012.6343824 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84870817925 (DOI: 10.1109/ROMAN.2012.6343824, Elsevier: Scopus)
22.	Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Learning Algorithm for Self-Organizing Map Classification of Electroencephalogram Patterns with Individual Differences, Proc. of WCCI 2012 IEEE World Congress Computation Intelligence, 2577-2582, Australia, Jun. 2012. (Summary) This paper introduces a method to classify electroencephalogram (EEG) patterns using a self-organizing map (SOM) with new learning algorithm considering an individual difference in EEG. To classify the EEG patterns with the individual difference, we propose an algorithm to specify the learning area of SOM based on sub-attribute information (SOMSA). The EEG data has two attributes that are the feature indicating the EEG pattern and sub-attribute information meaning the individual difference. The individual difference is quantified by analyzing human character, because this paper defines that one's character affects the individual difference. In the preprocessing, we extract the EEG feature vector by calculating the time average on each frequency band which are theta, alpha and beta, respectively. One's character is analyzed though the ego analysis using psychological testing. The device for recording the EEG uses the band-type device with a few numbers of electrodes. In order to prove the effectiveness of the proposed method, we conduct experiments using real EEG data. The experimental results show that the accuracy rate of the EEG pattern classification using SOMSA improves compared with the standard SOM. (Keyword) electroencephalogram / individual difference / self-organizing map / pattern classification (Link to Publication Site) ● Publication site (DOI): 10.1109/IJCNN.2012.6252723 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-84865078199 (DOI: 10.1109/IJCNN.2012.6252723, Elsevier: Scopus)
23.	Kayoko Matsubara, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Hidehisa Oku and Shoichiro Fujisawa : UD of Road Surface for the Low Vision, --- How Road Surface Condition Affects Visibility of Tactile Walking Surface Indicators(TWSIs)for the Low Vision ---, Universal Design 2012 Oslo, 1, Oslo, Jun. 2012. (Summary) WHO have announced that about 80% of visually impaired persons are the low vision (LVs) in the world. Many LVs can walk safely using the road and the feature things as a key. In Japan, many LVs can walk safety using a Tactile walking surface indicators (TWSIs) because its color is high conspicuous blight yellow and exists most walking place. However, LVs cannot identify the position of TWSIs, because of exists different color of TWSIs or low luminance contrasts between TWSIs and surrounding road. In order to improve these situations, we think ``lateral bands'', which installs neutral lines in both side of TWSIs, as a new method. This method improved the visibility of the TWSIs for LVs, but some LVs miss-recognize such lateral bands as a hole or ditches and they cannot walk safety. The purpose of our research is to find causes miss-recognition when LVs use. In this research, we designed two experiments, cause of we think luminance contrast of lateral bands or relationship of lateral bands and road are very important matter of miss-recognition for LVs. These experiments are to find the view of the band of LVs, and to find relationship between width, luminance contrasts and illumination. Fifty-nine LVs were participated as subjects as these experiments. The most important result was the luminance contrast of a line affects miss-recognition for LVs. I think that these research findings become one indicator of TWSIs with the lateral band of outdoor area or public building which was adapted for the universal design. Moreover, this result makes a big guideline of floor designing not only TWISs but also without. And, this result also makes good effort not only visual impaired persons but also an elderly person with eyesight gets worse.
24.	Nobuhisa Kuramoto, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Walking Motion Feature Detection System Based on EEG Analysis, Proceedings of 2012 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2012), 269-272, Honolulu, Mar. 2012.
25.	Matsubara Kayoko, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Oku Hidehisa and Shoichiro Fujisawa : Effect of Road Surface Condition for the Low Vision, Proceedings of 2012 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2012), 96-99, Honolulu, Mar. 2012.
26.	Shin-ichi Ito, Masashi Hamaguchi, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Variability in EEG with Single Point Sensing as Inter-Individual Difference Measure Using Self-Organizing Map, Proc. of 2011 International Symposium on Nolinear Theory and its Applications, NOLTA2011, 290-293, Kobe, Sep. 2011. (Summary) In this paper, we introduce an EEG analysis technique to confirm an inter-individual difference in prefrontal cortex EEG with a single point sensing. The device for recording the EEG uses the dry-type sensor and a few numbers of electrodes. The EEG analysis adapts the feature mining on EEG pattern using a self-organizing map (SOM). The EEG patterns are determined based on the preference evaluation on sound listened to. In the preprocessing, we extract the EEG feature vector by calculating the time average on each frequency band which are theta, low-alpha, high-alpha, low-beta, high-beta, respectively. To confirm the inter-individual difference, we do experiments using real EEG data. These results show that the learning results by SOM on each human are clearly different when using same initial weight values for the SOM.
27.	Shin-ichi Ito, Yasue Mitsukura, Takafumi Saito, Katsuya SATO and Shoichiro Fujisawa : Visualization on Pareto Solutions in Multi-objective Optimization, Proc. of 4th IASTED International Conference on Artificial Intelligent and Soft Computing, ASC2011, 267-272, Creta, Jun. 2011. (Summary) This paper proposes a method for assisting in the specification of a single optimal solution. The proposed method visualizes the relationship between the gene and fitness values of all individuals in a Pareto solution. The gene and fitness values are expressed as colored and gray scales, respectively. The information visualization technique in this paper has the advantage of indicating the Pareto solution and its details in one frame. To show the effectiveness of the proposed method, we apply the proposed method to benchmark problems. The proposed method visualizes the relationship between the gene and fitness values of all individuals in a Pareto solution. The gene and fitness values are expressed as colored and gray scales, respectively. It is possible to comfirm the Pareto solution and its details easily. (Keyword) genetic algorithm / Information visualization
28.	Ryota Kurozumi, Kosuke Tsuji, Shin-ichi Ito, Katsuya SATO, Shoichiro Fujisawa and Toru Yamamoto : Experimental Validation of an Online Adaptive and Learning Obstacle Avoiding Support System for the Electric Wheelchairs, Proceedings of 2010 IEEE International Conference on Systems, Man and Cybernetics (SMC 2010), 92-99, Istanbul, Oct. 2010. (Summary) 身体に障害を持つ高齢者が，空間が制限された室内において電動車いすの操縦することは，相当のスキルが必要である．この論文では，強化学習を用いて電動車いすの障害物回避の支援システムを述べる．障害物回避は，Minimum Vector Field Histogram(MVFH)法によって半自動で支援する．このMVHFをユーザー操作と障害物回避支援に適用する．この提案手法では，修正割合が環境とユーザーの状態に従って，強化学習によって調整される．この新しい手法をシュミレーション例で数値的に評価した．さらに，提案手法を実際の電動車いすに応用し，実際の操縦環境で提案手法の有効性を検証した． (Link to Publication Site) ● Publication site (DOI): 10.1109/ICSMC.2010.5642211 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-78751537203 (DOI: 10.1109/ICSMC.2010.5642211, Elsevier: Scopus)
29.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Association between Ego Scores and Individual Characteristics in EEG Analysis, --- Basic Study on Individual Brain Activity ---, Proc. of 19th IEEE International Symposium on Robot and Human Interactive Communication (Ro-Man'10), 230-235, Viareggio, Sep. 2010. (Summary) This paper introduces a method for discussing an association between ego scores and individual characteristics in EEG analysis. The ego scores express one of the personality and/or nature on a human. The EEG analysis calculates the power spectra of the frequency weighted of the EEG signal, and evaluates through detecting the EEG patterns while listening to the music. A k-nearest neighbor classifier is used to detect the EEG patterns. The specified weight value to weight frequency of EEG and the results of EEG pattern detection express the individual characteristics in EEG analysis. Finally, we do experiment using a real EEG data for discussing the association the ego scores and the individual characteristics in EEG analysis. An interesting tendency was that the subjects who were the combined ego-type tended to have a powerful response to negative stimuli more than positive stimuli. They had the stable filter weighted frequency. (Link to Publication Site) ● Publication site (DOI): 10.1109/ROMAN.2010.5598639 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-78649821619 (DOI: 10.1109/ROMAN.2010.5598639, Elsevier: Scopus)
30.	Shoichiro Fujisawa, Naohiro Yamada, Shin-ichi Ito, Katsuya SATO, Seiji Mitani and Osamu Sueda : Identification of Tactile Walking Surface Indicators by White Cane, Proceedings of 2010 IEEE International Conference on Virtual Environmnets Human-Computer Interfaces and Measurement Systems (VECIMS 2010), 52-55, Taranto, Sep. 2010. (Link to Publication Site) ● Publication site (DOI): 10.1109/VECIMS.2010.5609335 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-78650154443 (DOI: 10.1109/VECIMS.2010.5609335, Elsevier: Scopus)
31.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Study on Association between User's Personality and Individual Characteristic of Left Prefrontal Pole EEG Activity, Proc. of 2010 Sixth International Conference on Natural Computation (ICNC'10), 2163-2166, Yantai, Aug. 2010. (Summary) This paper introduces a method for discussing the association between human personality based on egogram scores and the results of classifying the electroencephalogram (EEG) patterns while listening to the music. The egogram based on psychological testing is used for analyzing his/her personality. The frequencies of the EEG analyzed are the components that contain significant and immaterial information and have different importance. We express the different importance through the weight value on frequencies using real-coded genetic algorithm. Then, the EEG patterns, which are determined based on the evaluation of the impression on the music, are classified using the k-nearest neighbor method. Finally, we discuss the association between his/her personality and the individual characteristic in the EEG analysis. An interesting tendency was that the false-detection accuracy of the EEG pattern, meaning the response on negative stimuli, did not become low when the score and level on ego states of Adult was extreme.
32.	Katsuya SATO and Kazuyuki MINAMI : Observation of initial calcium signal response to uniaxial stretching in a single osteoblastic cell using novel cell stretching microdevice, 6th World Congress of Biomechanics Abstracts, 496, Aug. 2010.
33.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : Study on Relationship between Personality and Individual Characteristic of EEG for Personalized BCI, Proc. of IEEE Region 8 SIBIRCON-2010, 106-111, Irkutsuk, Jul. 2010. (Summary) It is an important issue that the relationship between personality and individual characteristic of an electroencephalogram (EEG) for using a personalized brain computer interface on daily basis. In this paper, we introduce a method for discussing the relationship between personality based on egogram scores and the results of the EEG pattern detection. The egogram based on psychological testing is used for analyzing human personality. The frequencies of the EEG analyzed are the components that contain significant and immaterial information and have different importance. We express the different importance through the weight value on frequencies using real-coded genetic algorithm. Then, the EEG patterns, which are determined based on the evaluation of the impression on the music, are classified/detected using the k-nearest neighbor method. Finally, we discuss the relationship between human personality and the individual characteristic in the EEG analysis. An interesting tendency was that the false-detection ratio of the EEG pattern, meaning the response on negative stimuli, did not become low when the score and level on ego states of Adult was extreme. (Link to Publication Site) ● Publication site (DOI): 10.1109/SIBIRCON.2010.5555320 (Link to Search Site for Scientific Articles) ● Summary page in Scopus @ Elsevier: 2-s2.0-77957253414 (DOI: 10.1109/SIBIRCON.2010.5555320, Elsevier: Scopus)
34.	Kayoko Matsubara, Takamaro Hamada, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Hidehisa Oku, Seiji Mitani, Toshikazu Kato, Osamu Sueda and Shoichiro Fujisawa : Visibility of Lateral Band for Tactile Walking Surface Indicators, Proc. of NCSP'10, 203-206, Hawaii, Mar. 2010.
35.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : A Study on Relationship between Personal Feature of EEG and Human's Characteristic for BCI Based on Mental State, Proc. of IECON 2009, 4265-4268, Porto, Nov. 2009. (Summary) This paper discusses the relationship the result classified the electroencephalogram (EEG) patterns while listening to music and the humans nature, which indicates the personal feature of a human, based on the egogram pattern. The EEG analysis calculates the power spectra of the frequency of the EEG signal, divides into the frequency bands based on theta, alpha, and beta rhythms, and evaluates whether the music matches mood of the user or not through EEG pattern classification. A k-nearest neighbor classifier is used to classify the EEG patterns. The egogram is used for detecting nature of the human. Finally, we discuss the relationship the result of EEG pattern classification and the humans nature. An interesting finding was that the recognition accuracy of the EEG pattern meaning the response of them on negative stimuli became high when the subject was classified into the egogram pattern with introverted nature.
36.	Shoichiro Fujisawa, Naohiro Yamada, Seiji Mitani, Shin-ichi Ito, Katsuya SATO and Osamu Sueda : A study on recognition of tactile walking surface indicator by white cane, 10th Conference of Association for the Advancement of Assistive Technology in Europe, 850, Florence, Sep. 2009. (Summary) 視覚障害者が周囲路面と点ブロックと線ブロックを識別する場合，白杖を使って床情報を入手し床を識別する必要がある．しかし，床やブロックの寸法と識別しやすさの関係や，点字ブロックに触れたときの白杖の挙動は明らかになっていない．白杖が点字ブロックとの接触が始まるとき，量的に手に伝わるパワーを調査するのが必要がある．この研究では被験者が白杖で床を触知した際の白杖の振動加速度と識別しやすさとの関係について検討している．また，白杖を用いた床の識別には床のかたさやすべりに関係した凹凸の変化が大きく寄与していると言われている．本研究ではパラメトリックな寸法配置をもつ点ブロックを用い，白杖が点ブロックに衝突したときの白杖から手に伝わる力も分析する．
37.	Katsuya SATO, Taiji ADACHI, Daisuke UEDA and Masaki HOJO : Evaluation of local strain magnitude at initiation point of calcium signaling response to mechanical stimuli in osteoblastic cells, Proceedings of the 5th World Congress of Biomechanics, Jul. 2006.
38.	Katsuya SATO, Taiji ADACHI, Masaki HOJO and Yoshihiro TOMITA : Release of intracellular tension induces the rapid disassembly of actin stress fibers in osteoblastic cells, Proceedings of the 2nd Japan-Switzerland Workshop on Biomechanics, Sep. 2005.
39.	Taiji ADACHI, Katsuya SATO, Masaki HOJO and Yoshihiro TOMITA : Analysis of local strain that induces calcium signaling response to mechanical stimulus in a single osteoblastic cell, Proceedings of the 12th International Congress of Biorheology, May 2005.
40.	Taiji ADACHI and Katsuya SATO : Local disassembly of actin stress fibers induced by selected release of tension in osteoblastic cell, Proceedings of the 6th Asian-pacific conference on Medical and Biological Engineering, Apr. 2005.
41.	Katsuya SATO, Taiji ADACHI, Mamoru MATSUO and Yoshihiro TOMITA : Threshold magnitude of axial strain that induces stress fiber reorganization in osteoblastic cells, Proceedings of BMES 2004 Annual Fall Meeting, Oct. 2004.
42.	Katsuya SATO, Norio HIGASHI, Taiji ADACHI and Yoshihiro TOMITA : Observation of Localized Calcium Signaling Initiated by deformation of Cytomembrane in a Single Osteoblastic Cell, Proceedings of World Congress on Medical Physics and Biomedical Engineering, Sydney, Aug. 2003.
43.	Katsuya SATO, Taiji ADACHI and Yoshihiro TOMITA : Characteristic of calcium signaling response to cytomembrane deformation in a single osteoblastic cell, Proceedings of the 6th Membrane Research Forum, Nagoya, Nov. 2002.
44.	Katsuya SATO, Taiji ADACHI and Yoshihiro TOMITA : Directional dependency of sensing characteristics to mechanical stimulus in osteoblastic cell, Proceedings of the 4th World Congress of Biomechanics, Calgary, Aug. 2002.
45.	Taiji ADACHI, Katsuya SATO and Yoshihiro TOMITA : Calcium Signaling Response in Osteoblastic Cells to Mechanical Stimulus by Micropipette, Proceedings of Switzerland - Japan Workshop on, 59, Lausanne, Sep. 2001.
46.	Katsuya SATO, Taiji ADACHI and Yoshihiro TOMITA : Directional dependency of Ca2+ signaling response to mechanical stimulus in osteoblastic cell, Proceedings of ASME 2001 Bioengineering conference, 153-154, Snow bird, Jun. 2001.
47.	Taiji ADACHI, Katsuya SATO and Yoshihiro TOMITA : Change in Intracellular Calcium Concentration and Its Intercellular Propagation in Osteoblasts In Vitro Induced by Mechanical Stimulus Using Micropipette, Proceedings of 10th International Conference on Biomedical Engineering, 429-430, Singapore, Dec. 2000.

Proceeding of Domestic Conference:

1.	TOKIYA Ohe, Takeo Minamikawa and Katsuya SATO : Effects of micro-vibration stimuli on the osteoblasts synthesized substrate -Evaluation of Calcification using Raman spectroscopy-, 第34回バイオフロンティア講演会, 2F01, Dec. 2023.
2.	SHOTA Fukami, Kazuhide Mineda, Ichiro Hashimoto and Katsuya SATO : TRPV2 expression in keloid derived fibroblasts under stretching stimulus, 第34回バイオフロンティア講演会, A107, Dec. 2023.
3.	Katsuya SATO, Takeo Minamikawa and Takeshi Yasui : Compositional evaluation of osteoblasts synthesized matrix under micro-vibration stimuli by Raman spectroscopy, 生体医工学シンポジウム2023, Sep. 2023.
4.	Taira Eihara and Katsuya SATO : Calcium signaling response of osteoblasts to micro-vibrations with varying frequencies, 日本機械学会第33回バイオフロンティア講演会講演論文, 1E22, Dec. 2022.
5.	Kazuki Furuya, Eiji Hase, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : Changes in collagen production of osteoblasts subjected to microvibration stimulation including resting phase, 日本機械学会第33回バイオフロンティア講演会講演論文, 2E04, Dec. 2022.
6.	Katsuya SATO : Characteristics of osteoblastic calcium signaling response to microvibration stimuli (Effects of vibration magnitude and rest period insertion), 日本機械学会2022年度年次大会, S021-04, Sep. 2022.
7.	Katsuya SATO, Takeo Minamikawa and Takeshi Yasui : Observation of osteoblasts synthesized matrix under micro vibration using raman spectroscopy, 日本機械学会第34回バイオエンジニアリング講演会, 1P1-01, Jun. 2022.
8.	Shota Fukami, Ryota Sengoku, Kazuhide Mineda, Ichiro Hashimoto and Katsuya SATO : Research for up-regulated genes in keloid skin-derived fibroblasts under stretching stimulation, 日本機械学会中国四国学生会第52回学生員卒業研究発表講演会予稿集, Mar. 2022.
9.	Tokiya Ohe, Hirofumi Hosokawa, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : Evaluation of osteoblasts synthesized substrate calcification by Raman Spectroscopy, 日本機械学会中国四国学生会第52回学生員卒業研究発表講演会予稿集, Mar. 2022.
10.	Ryota Sengoku, Kazuhide Mineda, Ichiro Hashimoto and Katsuya SATO : 繰り返しストレッチ刺激を受けたケロイド皮膚由来線維芽細胞におけるシングルセル遺伝子発現解析, 第32回バイオフロンティア講演会講演論文集, 1A31, Jan. 2022.
11.	Satoshi Oda and Katsuya SATO : 微振動刺激付与による骨芽細胞アクチン細胞骨格の経時変化観察, 第32回バイオフロンティア講演会講演論文集, 1A28, Jan. 2022.
12.	Kazuhide Mineda, 千石遼太, Katsuya SATO, Yutaro Yamashita, Soushi Ishida, Yoshiro Abe and Ichiro Hashimoto : シングルセル解析からみたケロイド由来線維芽細胞におけるTRPチャネルの発現について, 第30回日本形成外科学会基礎学術集会, Oct. 2021.
13.	Seitaroh Tanaka and Katsuya SATO : Calcium signaling response to micro-vibration stimuli with rest insertion in osteoblastic cells, 日本機械学会 2021年度年次大会講演論文, S021-06, Sep. 2021.
14.	Hirofumi Hosokawa, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : Evaluation of composition and mechanical properties of culture osteoblast synthesized substrate by raman microscopy, 日本機械学会 2021年度年次大会講演論文, S021-05, Sep. 2021.
15.	Katsuya SATO : 微振動刺激に対する骨芽細胞のメカノトランスダクション ∼細胞核の役割についての推測∼, 日本機械学会第33回バイオエンジニアリング講演会, Jun. 2021.
16.	Akihiro Suzuki, masaki ri, Eiji Hase, Katsuya SATO, Kazuhide Mineda, Ichiro Hashimoto and Takeshi Yasui : 偏光分解SHG顕微鏡を用いたケロイド異常産生コラーゲン線維の定量評価, 第68回応用物理学会春季学術講演会予稿集, 19a-Z04-7, Mar. 2021.
17.	Rei Miyake, Kazuhide Mineda, 津田達也, Ichiro Hashimoto and Katsuya SATO : TAK-1 阻害剤によるケロイド線維芽細胞の遊走能と異常遺伝子発現を抑制する可能性の検討, 日本機械学会中国四国支部第59期総会・講演会, Mar. 2021.
18.	Kazuki Furuya, Hirofumi Hosokawa, Eiji Hase, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : SHG / THG observation of osteoblastic matrix formation process subject to vibration stimuli, 日本機械学会中国四国支部第51回学生員卒業研究発表講演会, Mar. 2021.
19.	Taira Eihara, Seitaroh Tanaka, Daiki Omori and Katsuya SATO : Calcium signal response of osteoblasts under micro-vibration stimulation with rest periods, 日本機械学会中国四国支部第51回学生員卒業研究発表講演会, Mar. 2021.
20.	Akihiro Suzuki, Masaki Ri, Eiji Hase, Katsuya SATO, Kazuhide Mineda, Ichiro Hashimoto and Takeshi Yasui : SHG(第2高調波発生光)顕微鏡を用いたケロイド異常産生コラーゲン線維の観察, Optics & Photonics Japan 2020, 14pA2, Nov. 2020.
21.	鈴木昭浩, Masaki Ri, Eiji Hase, Katsuya SATO, Kazuhide Mineda, Ichiro Hashimoto and Takeshi Yasui : ケロイド真皮コラーゲン線維の可視化, 生体医工学シンポジウム2020, 2A-19, Sep. 2020.
22.	Katsuya SATO, Yuta Kameyama, Hirofumi Hosokawa, Takeo Minamikawa and Takeshi Yasui : 培養骨芽細胞が産生する基質マトリクスの非線形光学顕微鏡による観察, Journal of Japanese Society of Bone Morphometry, Vol.30, No.1, S102, May 2020.
23.	Katsuya SATO, Kazuhide Mineda, Ichiro Hashimoto, 中原佐 and 南和幸 : Evaluation of mechanosensitivity to cyclic stretch in keloid derma derrived fivroblasts, 第32回バイオエンジニアリング講演会講演論文集(USBメモリ), 1F24, Dec. 2019.
24.	Kazuhide Mineda, Takatoshi Imagawa, Katsuya SATO, Sho Yoshimoto, Yutaro Yamashita, Soushi Ishida, Yoshiro Abe and Ichiro Hashimoto : ケロイド由来線維芽細胞における繰り返しストレッチ刺激に起因した病的カルシウムシグナル応答の検討, 第28回日本形成外科学会基礎学術集会, Nov. 2019.
25.	Shota Nakano, Takeo Minamikawa, Eiji Hase, 浅原彰文, Takahiko Mizuno, Katsuya SATO, Hirotsugu Yamamoto, Kaoru Minoshima and Takeshi Yasui : 光コム顕微鏡を用いた統合的光計測プラットホームの開発, ポストLEDフォトニクス公開シンポジウム, Oct. 2019.
26.	Shota Nakano, Takeo Minamikawa, Eiji Hase, 浅原彰文, Takahiko Mizuno, Katsuya SATO, Hirotsugu Yamamoto, Kaoru Minoshima and Takeshi Yasui : レーザー走査型光コム分光顕微鏡による生体計測, 第80回応用物理学会秋季学術講演会, 20p-PA4-12, Sep. 2019.
27.	Shota Nakano, Takeo Minamikawa, Eiji Hase, 浅原彰文, Takahiko Mizuno, Katsuya SATO, Hirotsugu Yamamoto, Kaoru Minoshima and Takeshi Yasui : レーザー走査型光コム定量位相差顕微鏡によるバイオイメージング, 生体医工学シンポジウム2019, 2A-29, Sep. 2019.
28.	Yuta Kameyama, Yosuke Iki, Takeshi Matsumoto, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : Influence of intermittent vibration stimuli on osteoblasts matrix production, 第30回バイオフロンティア講演会講演論文集, 2A31, Jul. 2019.
29.	Takatoshi Imagawa, Kazuhide Mineda, Ichiro Hashimoto, 渡部雄基, 中原佐, 南和幸 and Katsuya SATO : Calcium oscillation response to stretching stimuli in keloid fibroblast, 第30回バイオフロンティア講演会講演論文集, 2A15, Jul. 2019.
30.	Rei Miyake, Takatoshi Imagawa, Kazuhiro Sutani, Kazuhide Mineda, Ichiro Hashimoto, 中原佐, 南和幸 and Katsuya SATO : Investigation into the effect of steroid on the sensitivity of keloid dermal fibroblasts to the cyclic mechanical stimulation, 日本機械学会中国四国学生会第49回学生員卒業研究発表講演会講演論文集, 104, Mar. 2019.
31.	Daiki Ohmori, 渡部雄基, 中原佐, 南和幸 and Katsuya SATO : Osteoblastic calcium signaling response to cyclic stretching with tens of Hz frequency, 日本機械学会中国四国学生会第49回学生員卒業研究発表講演会講演論文集, 103, Mar. 2019.
32.	Katsuya SATO, Shota Okazawa, Yuta Kameyama, Takeshi Matsumoto, Takeo Minamikawa and Takeshi Yasui : Enhancement of osteoblastic matrix synthesis by using mechanical vibration stimuli, 第31回バイオエンジニアリング講演会論文集, 1F31, Dec. 2018.
33.	Takatoshi Imagawa, Kazuhiro Sutani, Kazuhide Mineda, Ichiro Hashimoto, 中原佐, 南和幸 and Katsuya SATO : Ca2+ signaling response to persistent cyclic stretch stimulation in fibroblast cell, 第29回バイオフロンティア講演会論文集, 2A24, Oct. 2018.
34.	Masaki Funakoshi, 中原佐, 南和幸 and Katsuya SATO : Strain distribution measurement in stress fibers of tensile stimulated cells, 第29回バイオフロンティア講演会論文集, 1A26, Oct. 2018.
35.	Kazuhiro Sutani, Kazuhide Mineda, Ichiro Hashimoto, 中原佐, 南和幸 and Katsuya SATO : Deference of mechanosensitivity between normal fibroblast and keloid fibroblast as the response to stretch stimulation which mimics thorax motion of breathing, 第29回バイオフロンティア講演会論文集, 1A23, Oct. 2018.
36.	Yuta Kameyama, Takeshi Matsumoto, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : Investigation of vibration condition to enhance osteoblasts proliferation and matrix mineralization, 第29回バイオフロンティア講演会論文集, 1A21, Oct. 2018.
37.	Kazuhide Mineda, Kazuhiro Sutani, Katsuya SATO, Sho Yoshimoto, Yutaro Yamashita, Soushi Ishida, Yoshiro Abe and Ichiro Hashimoto : ケロイド由来線維芽細胞における繰り返しストレッチ刺激に起因したカルシウムシグナル応答の検討, 第27回日本形成外科学会基礎学術集会, Oct. 2018.
38.	Katsuya SATO, Keita Fujimoto, Takeo Minamikawa and Takeshi Yasui : 20fsパルス幅レーザー照射による骨芽細胞へのフォトダメージ評価, 日本機械学会2018年年次大会, S0210103, Sep. 2018.
39.	Ryuta Yasui, 中原佐, 南和幸, Shoichiro Fujisawa and Katsuya SATO : Deference of intracellular Ca2+ signaling as the response to retained stretch and cyclic stretch in osteoblastic cells, 第30回バイオエンジニアリング講演会講演論文集, 216, Dec. 2017.
40.	Katsuya SATO, Soma Yamamoto, 中原佐, 南和幸 and Shoichiro Fujisawa : Observation of change in intracellular calcium concentration during stretching and stretch release application in osteoblastic cell, 第30回バイオエンジニアリング講演会講演論文集, 214, Dec. 2017.
41.	Kazuhide Mineda, Kazuhiro Sutani, Katsuya SATO, Soushi Ishida, Yoshiro Abe and Ichiro Hashimoto : 繰り返しストレッチ刺激を契機としたヒト線維芽細胞におけるカルシウムシグナル応答の検討, 第47回日本創傷治癒学会予稿集, JO-01, Nov. 2017.
42.	Kazuhiro Sutani, Kazuhide Mineda, Ichiro Hashimoto, 中原佐, 南和幸 and Katsuya SATO : Evaluation of fibroblasts response to stretch stimulation which mimics thorax motion of breathing, 第28回バイオフロンティア講演会講演論文集, 1A23, Oct. 2017. (Keyword) Fibroblast / Keloid / Calcium response / Cell stretching microdevice / Fluorescent ratio value
43.	Masaki Funakoshi, 中原佐, 南和幸 and Katsuya SATO : Intracellular strain field measurement of stretched cell using mitochondria as a vibualization marker, 第28回バイオフロンティア講演会講演論文集, 1A22, Oct. 2017. (Keyword) mitochondria / Cell stretching microdevice / Digital image correlation
44.	Shoichiro Fujisawa, 三原佑太, Shin-ichi Ito and Katsuya SATO : VR技術を用いた視覚障害体験システムの開発, 第22回日本バーチャルリアリティ学会大会論文集, No.1B3-06, 1-4, Sep. 2017. (Summary) 我が国の視覚障害者数は164万人に上る．そのうちの144万9千人がロービジョン者であり, 緑内障, 糖尿病網膜症, 加齢性黄斑変性, 色弱等の症状を抱えている．そこで本研究では, ステレオカメラを内蔵したヘッドマウントディスプレイを用いて多種多様な視覚障害の症例を体験できるシステムを構築した．カメラから取り込んだ画像にPC上で画像処理を行い, ヘッドマウントディスプレイに出力することで様々な視覚障害の症状を再現する．特に本報ではシステム開発に向けた第一歩として色弱の見え方を再現することを目指した． (Keyword) 色覚異常 / ユニバーサルデザイン
45.	劉楠, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 視覚障害者のための階段昇降支援ロボットの開発, 平成29年電気学会電子・情報・システム部門大会講演論文集, 529-531, Sep. 2017.
46.	萬代蘭丸, Ryota Kurozumi, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Recognition of Visually Impaired Person with Deep Learning, 平成29年電気学会電子・情報・システム部門大会講演論文集, 523-528, Sep. 2017. (Summary) The purpose of this research is to identify the visually impaired person by learning the still picture of walking of a visually impaired person and a healthy person by the deep learning. The still picture of walking has taken out the still picture of animation from side from on. The identify rate of 99.9% every 2000 image numbers and 2 times of the drop number was obtained. (Keyword) deep learning / Visually Impaired Person / Blind Person / Independent Travel
47.	Okazawa Shota, Takeshi Matsumoto, Takeshi Yasui, Takeo Minamikawa and Katsuya SATO : 骨芽細胞のコラーゲン産生における振動・ストレッチ複合刺激の影響, 日本機械学会2017年年次大会, S0210201, Sep. 2017.
48.	永濱秀明, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 稲垣具志, 池田典弘, 竹内聖人, 荻原弘 and 高橋和哉 : 方向定位付きLED発光ブロックの全盲者向け敷設位置の検証, ロボティクス・メカトロニクス講演会2017講演論文集, 2A2-M03(1)-2A2-M03(4), May 2017.
49.	Shota Okazawa, Takeshi Matsumoto, Takeshi Yasui, Takeo Minamikawa and Katsuya SATO : Enhancement of osteoblastic collagen synthesis under combined vibration and stretching stimulation, 日本機械学会中国四国支部第55期総会・講演会講演論文集, Feb. 2017.
50.	Kazuhiro Sutani, Kazuhide Mineda, Ichiro Hashimoto, 中原佐, 南和幸 and Katsuya SATO : Evaluation of fibroblasts mechno-sensitivity under cyclic stretch which simulating thorax motion of breathing, 日本機械学会中国四国支部第55期総会・講演会講演論文集, Feb. 2017.
51.	永濱秀明, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 清山幹弘, 稲垣具志, 池田典弘, 竹内聖人, 荻野弘 and 高橋和哉 : 視覚障害者用方向定位付きLED 発光ブロックの実証実験, 第17回計測自動制御学会システムインテグレーション部門講演会(SI2016), 2822-2825, Dec. 2016.
52.	石橋樹, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 視覚障害者誘導用ブロックの方向定位性能の定量的評価, 第17回計測自動制御学会システムインテグレーション部門講演会(SI2016), 2819-2821, Dec. 2016.
53.	Eiji Hase, Takeo Minamikawa, Daisuke Yonekura, Katsuya SATO, Mitsuhiko Takahashi and Takeshi Yasui : SHG顕微鏡を用いた腱修復におけるコラーゲン配向解析, Optics&Photonics Japan2016, 2aA4, Oct. 2016.
54.	Soma Yamamoto, 中原佐, 南和幸, Shoichiro Fujisawa and Katsuya SATO : Intracellular calcium signal dynamics as the response to stretching and contracting stimuli in osteoblast-like cell, 第27回バイオフロンティア講演会講演論文集, 5-6, Oct. 2016.
55.	Ryuta Yasui, 中原佐, 南和幸, Shoichiro Fujisawa and Katsuya SATO : Deference of intracellular Ca2+ signaling response to stretching stimuli corresponding to Ca2+ sources in osteoblastic cells, 第27回バイオフロンティア講演会講演論文集, 3-4, Oct. 2016.
56.	Oki Matsubara, Eiji Hase, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : in vivo analysis of collagen fiber orientation produced by cyclically stretched osteoblast like cells with polarization-solved SHG microscopy, 第27回バイオフロンティア講演会講演論文集, 101-102, Oct. 2016.
57.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : 偏光分解SHG(第2高調波発生光)顕微鏡を用いた修復腱におけるコラーゲン配向解析, 第39回日本生体医工学会中国四国支部大会講演抄録, I-7, Oct. 2016.
58.	Oki Matsubara, Eiji Hase, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : 偏光分解SHG顕微鏡を用いた繰り返し伸縮刺激を受ける骨芽細胞産生コラーゲンのin vivo線維配向解析, 第39回日本生体医工学会中国四国支部大会講演抄録, 17, Oct. 2016.
59.	山本蒼馬, 中原佐, 南和幸, Shoichiro Fujisawa and Katsuya SATO : 伸縮ひずみに対する骨芽細胞のカルシウムシグナル応答, 第39回日本生体医工学会中国四国支部大会講演抄録, 15, Oct. 2016.
60.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Daisuke Yonekura, Mitsuhiko Takahashi and Takeshi Yasui : SHG顕微鏡を用いた腱修復の観測, 生体医工学シンポジウム2016, 2P-5-6, Sep. 2016.
61.	石橋樹, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : Quantitative Evaluation of Orientation Performance of Tactile Walking Surface Indicators for the Blind, 2016 JSME Conference on Robotics and Mechatronics, 2P1-03a4(1)-2P1-03a4(3), Jun. 2016.
62.	永濱秀明, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 清山幹弘, 稲垣具志, 池田典弘, 竹内聖人, 荻野弘 and 高橋和哉 : Proof experiment of LED block equipped with projections to locate travel direction for blind and vision impaired persons, 2016 JSME Conference on Robotics and Mechatronics, 2P1-03a3(1)-2P1-03a3(3), Jun. 2016. (Summary) Crosswalk entrances are on the boundary with the roadway and are among the dangerous areas for visually impaired persons. Tactile walking surface indicators (TWSIs) are installed on the road to support independent travel for visually impaired persons. We developed an LED block equipped with projections to strengthen the support of the crosswalk entrance. Visually impaired persons found the LED block equipped with projections to locate travel direction to effectively support crossing. The effectiveness of this block is described from the measurement date and the questionnaire results. (Keyword) visual impaired person / crosswalk / TWSIs / LED block
63.	Taiki Yamamoto, Shoichiro Fujisawa and Katsuya SATO : Development of silicone rubber stretching chamber for uniaxial stretch stimuli with strain gradient, 日本機械学会中国四国支部第54期総会・講演会, 1008, Mar. 2016.
64.	Ryuta Yasui, Hiroki Oniwa, Tasuku Nakahara, Kazuyuki Minami, Shoichiro Fujisawa and Katsuya SATO : Different mechanism of osteoblastic intracellular calcium response between direct indentation and stretch stimuli, 日本機械学会中国四国支部第46回学生員卒業研究発表講演会, 818, Mar. 2016.
65.	Keita Fujimoto, Ohki Matsubara, Eiji Hase, Takeo Minamikawa, Yuki Ogura, Takeshi Yasui and Katsuya SATO : Enhancemnet of fibroblasts collagen synthesis by cyclic stretch stimulation, 日本機械学会中国四国支部第46回学生員卒業研究発表講演会, 816, Mar. 2016.
66.	Kenta NUNOBIKI, Ryo FUKUOKA, Kazuyuki MINAMI, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Measurement of intracellular strain distribution by the real time observation of stretched cells, 第28回バイオエンジニアリング講演会講演論文集, 2D13, Jan. 2016.
67.	Manabu KATAYAMA, Ryo FUKUOKA, Kazuyuki MINAMI, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : In situ observation of intracellular calcium singaling response to stretch with video rate temporal resolution, 第28回バイオエンジニアリング講演会講演論文集, 2D12, Jan. 2016.
68.	糸永昇平, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and 上田喜敏 : 介助作業における腰部負担評価に関する研究, 第16回システムインテグレーション部門講演会, 99-101, Dec. 2015.
69.	石橋樹, 吉村祥吾, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and 前野哲哉 : 知的・精神障害者の作業分析に関する研究, 第16回システムインテグレーション部門講演会, 96-98, Dec. 2015.
70.	中島紘一, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 重度障害者を対象とした意思伝達装置に関する研究, 第16回システムインテグレーション部門講演会, 93-95, Dec. 2015.
71.	Oki Matsubara, Eiji Hase, Takeo Minamikawa, Takeshi Yasui and Katsuya SATO : 繰り返し伸縮刺激下における骨芽細胞産生コラーゲンのSHGイメージングによる評価, Optics & Photonics Japan 2015, 28aC8, Oct. 2015.
72.	Eiji Hase, Takeo Minamikawa, Katsuya SATO, Mitsuhiko Takahashi and Takeshi Yasui : SHG(第2高調波発生光)顕微鏡を用いた腱修復状態の観察, Optics & Photonics Japan 2015, 28aC9, Oct. 2015.
73.	Eiji Hase, Mitsuhiko Takahashi, Katsuya SATO and Takeshi Yasui : 第二高調波発生光(SHG)顕微鏡を用いた腱修復のモニタリング, 生体医工学シンポジウム2015, 1A-19, Sep. 2015.
74.	Oki Matsubara, Eiji Hase, Takeshi Yasui, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : 経時的その場観察における繰り返し伸縮刺激下の骨芽細胞産生コラーゲン評価, 日本機械学会2015年度年次大会, S0210102, Sep. 2015.
75.	Souma YAMAMOTO, Ryo FUKUOKA, Kazuyuki MINAMI, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Observation of intracellular Ca2+ signaling response to cyclic stretch in osteoblastic cells, 日本機械学会第26回バイオフロンティア講演会講演論文集, Sep. 2015.
76.	Koki TAKAHASHI, Ryo FUKUOKA, Kazuyuki MINAMI, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Time lapse imaging of cellular morphology and intracellular strain distribution in cycliccaly stretched osteoblastic cell, 日本機械学会第26回バイオフロンティア講演会講演論文集, Sep. 2015.
77.	Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 清山幹弘, 稲垣具志, 池田典弘 and 高橋和哉 : 横断歩道口に敷設した発光ブロックの視認性, ロボティクス・メカトロニクス講演会2015講演論文集, No.1P2-D08, 1-3, May 2015. (Keyword) 視覚障害者誘導用ブロック / 視覚障害者 / 支援機器 / LEDブロック / 交差点
78.	松原央樹, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Time lapse in situ observation and long-term culturing of osteoblastic cells under cyclic stretch, 日本機械学会中国四国学生会第45 回学生員卒業研究発表講演会CD-ROM, Mar. 2015.
79.	山本蒼馬, 宮崎裕孝, 福岡諒, 南和幸, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Real time in situ observation of intracellular Ca2+ signaling response to cyclic stretch in osteoblastic cell, 日本機械学会中国四国学生会第45 回学生員卒業研究発表講演会CD-ROM, Mar. 2015.
80.	Ogawa Yuki, Miyazaki Hirotaka, Fukuoka Ryo, Minami Kazuyuki, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Osteoblastic calsium signaling response to different magnitude of stretching stimuli, Procddeings of the 27th Bioengineering conference 2014 annual meeting of BED JSME, 113-114, Jan. 2015.
81.	田辺猛, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : A study on road traffic noise reproduction by wave field synthesis, 第15回計測自動制御学会システムインテグレーション部門講演会, 2686-2689, Dec. 2014.
82.	大嶋昇, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and Masayuki Booka : Research of the oscillating reduction effect due to tire pressure during wheelchair acceleration running, 第15回計測自動制御学会システムインテグレーション部門講演会, 2677-2679, Dec. 2014.
83.	清山幹弘, 志賀大輔, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 稲垣具志, 池田典弘 and 高橋和哉 : Research on identifying LED blocks mounted on crosswalk boundaries, 第15回計測自動制御学会システムインテグレーション部門講演会, 2671-2674, Dec. 2014.
84.	Eiji Hase, Katsuya SATO and Takeshi Yasui : SHG(第2高調波発生光)顕微鏡を用いた骨芽細胞産生コラーゲンのその場観察, Optics & Photonics Japan2014, Nov. 2014.
85.	Kenta Nunobiki, 宮崎裕孝, 福岡諒, 南和幸, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Measurement of intracellular strain distribution in single cell level under tensile, Proceedings of the 25th JSME conference on frontiers in bioengineering, 43-44, Oct. 2014.
86.	Manabu Katayama, 宮崎裕孝, 福岡諒, 南和幸, Shin-ichi Ito, Shoichiro Fujisawa and Katsuya SATO : Observation of calcium signaling response to stretching in osteoblastic cells using fluorescence ratiometry method, Proceedings of the 25th JSME conference on frontiers in bioengineering, 41-42, Oct. 2014.
87.	Eiji Hase, Katsuya SATO and Takeshi Yasui : 高感度SHG顕微鏡を用いた骨芽細胞産生コラーゲンの可視化, 生体医工学シンポジウム2014, Sep. 2014.
88.	Eiji Hase, Katsuya SATO, Shoichiro Fujisawa and Takeshi Yasui : 生体コラーゲンSHG(第2高調波発生)顕微鏡を用いた骨芽細胞産生コラーゲンの可視化, 日本機械学会2014年度年次大会, Sep. 2014.
89.	Eiji Hase, Katsuya SATO, Mitsuhiko Takahashi and Takeshi Yasui : 10fsレーザーを用いた生体コラーゲンSHG顕微鏡の高感度化, 第61回応用物理学関係連合講演会, 17p-E6-10, Mar. 2014.
90.	Yashuyuki Ishihara, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 内外反変形をダイナミックに矯正可能な装具の開発, 第14回計測自動制御学会システムインテグレーション部門講演会講演論文集, 2073-2075, Dec. 2013.
91.	池田典弘, 高橋和哉, 木村有希, 稲垣具志, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and 志賀大輔 : 横断歩道口用発光ブロックの認識に関する研究, 第14回計測自動制御学会システムインテグレーション部門講演会講演論文集, 2027-2029, Dec. 2013.
92.	廣野恭平, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 視覚障害者のための交差点周辺における移動支援機器間の連続性に関する研究, 第14回計測自動制御学会システムインテグレーション部門講演会講演論文集, 2023-2026, Dec. 2013.
93.	Katsuya SATO, 門司亮, 中島雄太, 南和幸, Shin-ichi Ito and Shoichiro Fujisawa : ストレッチ刺激に対する培養骨芽細胞のカルシウム応答のその場観察, 第36回日本生体医工学会中国四国支部大会講演抄録, 20, Oct. 2013.
94.	Eiji Hase, Katsuya SATO, Mitsuhiko Takahashi and Takeshi Yasui : 10フェムト秒レーザーを用いた生体コラーゲンSHG顕微鏡の高感度化, 生体医工学シンポジウム2013, 2-2-06, Sep. 2013.
95.	倉本展尚, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 随意運動における脳活動のメカニズム, 平成25年度電気学会電子・情報・システム部門大会講演論文CD-ROM, 1101-1106, Sep. 2013.
96.	Shoichiro Fujisawa, 前野哲哉, 小川武紘, 石本晃大, Shin-ichi Ito and Katsuya SATO : Job Evaluation Method in Group Work in Mentally Retared Persons/Mental Disorder Persons, 日本機械学会2013年度年次大会講演論文集, No.13-1, 1-5, Sep. 2013. (Summary) The percentage of company employment as advance into society in the intellectually/mentally disabled is almost the same as that in the physically disabled, and moreover is getting higher every year. The first objective is to analyze the characteristics of the intellectually/mentally disabled more deeply in order to help the government and companies to understand them and the employment rate to increase. The second objective is to review the work evaluation method of the intellectually/mentally disabled anew through this evaluation in order to trigger the research on the intellectually/mentally disabled to be activated. The result of the verification performed by this research has showed that the success or failure in a continuous company employment is more significantly related to the factors of "surrounding healthy persons" which are external factors than the factors arising from the disability of a disabled person. According to the result of this study, if they work with healthy persons in the same place, their job performance actually decreases. This shows that disabled person's own willingness to work and job performance ability is not much influenced by individual disability characteristics, but they are very likely to be significantly influenced by whether the human environment around them in the workplace is good or not. (Keyword) Environment in the workplace / healthy persons and disabled persons / Analysis of the movement / Support of the working
97.	木村有希, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 高橋和哉, 池田典弘 and 荻野弘 : 高齢者・視覚障がい者のための横断歩道口発光ブロックの検証, 日本福祉のまちづくり学会第16回全国大会, No.1A-1, 1-2, Aug. 2013.
98.	加地純也, 廣野恭平, Shin-ichi Ito, Katsuya SATO, Junichi Hino and Shoichiro Fujisawa : 座圧分散クッションを使用した車椅子走行時の振動伝達特性と乗り心地評価, ロボティクス・メカトロニクス講演会2013講演論文集, No.2A2_C01, 1-2, May 2013. (Summary) In this study, we evaluated riding comfortableness of the attendant propelled wheelchair when using pressure redistributing cushions. Three types, a form type, a gel type and an air type cushions were respectively tested. The vibration propagating characteristics of these cushions were evaluated by measuring vibration of the dummy weight which was put on the pressure redistributing cushion during wheelchair running on tactile surface indicator road. In addition, a sensory test was conducted to compare the comfortableness of these cushions. Vibration wave form was analyzed by FFT, and sensory test was conducted by using questionnaire for subjects riding on the wheelchair with pressure redistributing cushion. As the result, the air type cushion indicated highest vibration damping performance, and the gel type was second, the form type cushion was third, respectively. The total result of the sensory test questionnaire correlated with the vibration damping performance. The cushion which has higher vibration damping performance provides better riding comfortableness to the occupant. (Keyword) Wheelchair / Pressure Redistributing Cushion / Riding Comfortableness / Vibration Measurement
99.	Katsuya SATO, 門司亮, 中島雄太, 南和幸, Shin-ichi Ito and Shoichiro Fujisawa : In situ observation of calcium signaling response to stretch in osteoblast, 第25回バイオエンジニアリング講演会講演論文集, 449-450, Jan. 2013.
100.	Shin-ichi Ito, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : 心理学的個人差を導入した脳波パターン分類, 第13回計測自動制御学会システムインテグレーション部門講演会論文集, 2660-2663, Dec. 2012.
101.	宮崎達也, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 視覚障害者のための交差点周辺における移動支援機器間の連続性に関する研究, 第13回計測自動制御学会システムインテグレーション部門講演会論文集, 2638-2639, Dec. 2012.
102.	上田喜敏, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 介助作業実態分析から考えられるベッドでの安全な患者/利用者介助に関する人間工学的手法の研究, 第13回計測自動制御学会システムインテグレーション部門講演会論文集, 2610-2615, Dec. 2012.
103.	Shoichiro Fujisawa, 三原佑太, Shin-ichi Ito and Katsuya SATO : Development of visual impairment mimetic system using AR technology, 生活生命支援医療福祉工学系連合大会2012(LIFE2012), No.OS2-4-3, 1-4, Nov. 2012. (Summary) We developed the visual impairment mimetic system to provide a visual impairment experiment system for visually non-handicapped person. Our system using AR technology with head mounted displays and buil-in stereo cameras. Captured images from the stereo cameras are processed in the PC to mimic a visual impairment and displayed on the head mounted display. In this study, we demonstrate the color-blindness experiment system as the one example of our system. Three types of color-blindness are mimicked, protanope, deuteranope and achromat. And we simulate several kind of color-blindness with slightly or severely. (Keyword) Universal Design
104.	Katsuya SATO, 門司亮, 中島雄太, 南和幸, Shin-ichi Ito and Shoichiro Fujisawa : Observation and evaluation of osteoblastic cellular response to stretch loading, M&M2012 材料力学カンファレンス講演論文集CD, OS1506, Sep. 2012.
105.	Nobuhisa Kuramoto, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 歩行運動に関連した脳波の特徴抽出, 平成24年電気学会電子・情報・システム部門大会講演論文集, 1051-1056, Sep. 2012.
106.	椿卓也, Jiro Yonezaki, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : ALS患者を対象とした重度障害者用意思伝達装置適正処方システムの開発, ロボティクス・メカトロニクス講演会2012講演論文集, No.2A2-T09, 1-2, May 2012.
107.	三原佑太, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : AR技術を応用した視覚障害体験システムの開発, ロボティクス・メカトロニクス講演会2012講演論文集, No.1A1-N04, 1-4, May 2012.
108.	Shoichiro Fujisawa, 池田典弘, 高橋和哉, 山本源治, 木村有希, 三宅章郁, Shin-ichi Ito and Katsuya SATO : 視覚障害者のための横断歩道口発光ブロックの検証, ロボティクス・メカトロニクス講演会2012講演論文集, No.1A1-N03, 1-3, May 2012.
109.	Katsuya SATO, 門司亮, 中島雄太, 南和幸, Shin-ichi Ito and Shoichiro Fujisawa : Development of micro device for real time in situ observation of stretched cell, 日本生体医工学会第51回大会プロシーディングスCD-ROM, May 2012.
110.	池田典弘, 高橋和哉, 山本源治, 木村有希, 三宅章郁, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Verification of luminous block used for crosswalk entrance for persons with visually impairment, 日本機械学会第24回バイオエンジニアリング講演会論文集, 7B16, Jan. 2012.
111.	三原佑太, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : Development of visual impairment mimetic system using AR technology, 日本機械学会第24回バイオエンジニアリング講演会講演論文集 CD-ROM, 7B15, Jan. 2012.
112.	見方俊介, Katsuya SATO, 門司亮, 中島雄太, 南和幸, Shin-ichi Ito and Shoichiro Fujisawa : Evaluation of threshold substrate strain for osteoblastic cellular response to stretch, 日本機械学会第24回バイオエンジニアリング講演会講演論文集CD-ROM, 8C15, Jan. 2012.
113.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO and Shoichiro Fujisawa : 自己組織化マップを用いた個体差を考慮した脳波分析, 計測自動制御学会システムインテグレーション部門講演会, 2208-2211, Dec. 2011.
114.	谷林宏紀, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 指向性スピーカーを用いた広域音場再現手法の開発, 第12回公益社団法人計測自動制御学会システムインテグレーション部門講演会論文集, 2187-2188, Dec. 2011.
115.	三宅章郁, 高橋慎治, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : Capability for directional indication on tactile walking surface indicators for the visually impaired, 第12回公益社団法人計測自動制御学会システムインテグレーション部門講演会論文集, 2179-2180, Dec. 2011.
116.	椿卓也, Jiro Yonezaki, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : ALS患者を対象とした重度障害者用意思伝達装置適正処方システムの開発, 第12回公益社団法人計測自動制御学会システムインテグレーション部門講演会論文集, 2185-2186, Dec. 2011.
117.	Shin-ichi Ito, Masashi Hamaguchi, Katsuya SATO and Shoichiro Fujisawa : 自己組織化マップを用いた個人差を考慮した脳波分析法, 計測自動制御学会四国支部学術講演会, CD-ROM, Nov. 2011.
118.	Shin-ichi Ito, Masashi Hamaguchi, Katsuya SATO, Shoichiro Fujisawa and Toru Yamamoto : 自己組織化マップによる前頭極脳波の個人差分析~個人差を考慮した生活支援機器の開発を目指して~, 生活生命支援医療福祉工学系連合大会2011, OS2-3-1-OS2-3-2, Nov. 2011.
119.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO and Shoichiro Fujisawa : 単一探査センサセンシングによる個人差を考慮した脳波分析法, 第34回日本生体医工学会中国四国支部大会講演抄録集, 24, Oct. 2011.
120.	Katsuya SATO, 門司亮, 中島雄太 and 南和幸 : 伸展刺激を受ける細胞のその場観察用マイクロデバイスの開発と試作, 第34回日本バイオレオロジー学会年会プログラム・抄録集, 33, Jun. 2011.
121.	三宅章郁, 高橋慎治, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 視覚障害者誘導用ブロック等における方向提示性能の評価, ロホティクス・メカトロニクス講演会2011講演論文集, No.2P1-D06, 1-2, May 2011.
122.	濱田隆麿郎, 松原加代子, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, 奥英久 and Shoichiro Fujisawa : ロービジョン者の歩行面における誤識別に関する研究, ロホティクス・メカトロニクス講演会2011講演論文集, No.2P1-D10, 1-3, May 2011.
123.	門司亮, 南和幸, 中島雄太, Katsuya SATO and 中野圭悟 : Design and fabrication of highly precise cell stretch micro device, 日本機械学会中国四国支部第49期総会・講演会講演論文集, Vol.115, No.1, 195-196, Mar. 2011.
124.	Shin-ichi Ito, Takafumi Saito, Yasue Mitsukura, Katsuya SATO and Shoichiro Fujisawa : 最適解探索支援のための遺伝的アルゴリズムの可視化技術, 動的画像処理実利用化ワークショップ(DIA2011), 244-247, Mar. 2011.
125.	中野圭悟, Katsuya SATO, 中島雄太 and 南和幸 : Development of a stretching micro device to observe cellulare response to strain gradient field, 第23回バイオエンジニアリング講演会講演論文集, 151-152, Jan. 2011.
126.	椿卓也, 北川博巳, 池田典弘, 山本源治, 最所裕二, 前田耕造, 矢野秀樹, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : LED誘導鋲を用いた視覚障害者歩行支援システムの評価, 第11回システムインテグレーション部門講演会, 1824-1825, Dec. 2010.
127.	谷林宏紀, 北川博巳, 池田典弘, 山本源治, 最所裕二, 前田耕造, 矢野秀樹, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 路面埋め込み型スピーカーを用いた音響誘導装置の特性評価, 第11回システムインテグレーション部門講演会, 1822-1823, Dec. 2010.
128.	三宅章郁, 北川博巳, 池田典弘, 山本源治, 最所裕二, 前田耕造, 矢野秀樹, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : LED境界表示灯を用いた視覚障害者歩行支援システムの評価, 第11回システムインテグレーション部門講演会, 1820-1821, Dec. 2010.
129.	Shoichiro Fujisawa, 松原加代子, 濱田隆麿郎, Shin-ichi Ito, Katsuya SATO, Masayuki Booka and 奥英久 : ロービジョン者の歩行面の御識別に関する研究, 第31回バイオメカニクス学術講演会SOBIM2010予稿集, 307-310, Nov. 2010.
130.	Shoichiro Fujisawa, Ryota Kurozumi, 辻洸介, Shin-ichi Ito, Katsuya SATO and 山本透 : 電動車いすのオンライン学習による障害物回避支援システムの研究, 第53回自動制御連合講演会, 1174-1177, Nov. 2010.
131.	Ryota Kurozumi, 辻洸介, Shin-ichi Ito, Katsuya SATO, Shoichiro Fujisawa and 山本透 : オンライン適応学習を用いた電動車いすの障害物回避補助システムの実験的評価, 第20回インテリジェント·システム·シンポジウム講演論文集, S5-3-2-1-S5-3-2-4, Sep. 2010.
132.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : 脳波の個人特性とエゴ得点との関連性考察, 第20回インテリジェント·システム·シンポジウム講演論文集, S5-3-4, Sep. 2010. (Keyword) electroencephalogram
133.	立石広志, 上田喜敏, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : 介助者の重心位置とベッド高の関係が腰部負荷に及ぼす影響, 生活生命支援医療福祉工学系学会連合大会(WWLS2010)講演論文集CD-ROM, Sep. 2010.
134.	毛利太一, 橋詰努, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : スロープ登坂時における車いす利用者の身体的負荷の評価, 生活生命支援医療福祉工学系学会連合大会(WWLS2010)講演論文集CD-ROM, Sep. 2010.
135.	松原加代子, 濱田隆磨郎, Shin-ichi Ito, Katsuya SATO, 坊岡正之, 奥英久 and Shoichiro Fujisawa : ロービジョン者における視覚障害者誘導用ブロックの視認性向上に関する研究-側帯付加による視認性向上と誤認識発生に関する実験的検討-, 生活生命支援医療福祉工学系学会連合大会(WWLS2010)講演論文集CD-ROM, Sep. 2010.
136.	Shoichiro Fujisawa, 辻洸介, Ryota Kurozumi, Shin-ichi Ito, Katsuya SATO and 山本透 : 強化学習を用いた電動車椅子の障害物回避補助システムに関する研究, 平成22年度第15回知能メカトロニクスワークショップ講演論文集, 1-5, Sep. 2010.
137.	原田敏司, 米津金吾, 上田喜敏, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : ベッド高の相違による重量物持上げ動作時の背筋筋電図測定と疲労解析, ロボティクス・メカトロニクス講演会'10講演論文集, Vol.1P1, No.G07, 1-4, Jun. 2010.
138.	濱田隆麿郎, 松原加代子, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, 奥英久 and Shoichiro Fujisawa : ロービジョン者の歩行面の誤識別に関する研究, ロボティクス・メカトロニクス講演会'10講演論文集, Vol.1A1, No.D10, 1-3, Jun. 2010.
139.	山田尚平, Katsuya SATO and 南和幸 : Development of elastic platform holding cells for bio-microactuator, 第22回バイオエンジニアリング講演会講演論文集, 314, Jan. 2010.
140.	鎌田慧, Katsuya SATO and 南和幸 : Study for real time in situ observation of stretched osteoblastic cell, 第22回バイオエンジニアリング講演会講演論文集, 235, Jan. 2010.
141.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : 脳波の個人特性とユーザの心理特性との関連性に関する一考察, 第10回(社)計測自動制御学会システムインテグレーション部門講演会論文集, 1595-1598, Dec. 2009.
142.	原田敏司, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 交差点の音場空間再現と評価手法の検討, 第10回(社)計測自動制御学会システムインテグレーション部門講演会論文集, 1593-1594, Dec. 2009.
143.	Katsuya SATO, 山田尚平 and 南和幸 : Development of microgrooved substrate for bio-microactuator, 第10回(社)計測自動制御学会システムインテグレーション部門講演会講演概要集, 287, Dec. 2009.
144.	米津金吾, 原田敏司, 上田喜敏, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : ベッド高の相違による重量物持ち上げ動作時の生理学的検証, 第7回生活支援工学系学会連合大会講演予稿集, 28-29, Sep. 2009.
145.	原田敏司, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 波面合成法を用いた交差点音場環境の再現, 第7回生活支援工学系学会連合大会講演予稿集, 25-26, Sep. 2009.
146.	Katsuya SATO, 山田尚平 and 南和幸 : Development of elastic platform for bio-micro actuator, 日本機械学会福祉工学シンポジウム2009講演論文集, 189-190, Sep. 2009.
147.	Katsuya SATO, 鎌田慧 and 南和幸 : Development of MEMS device for real time observation of stretching cell, 日本機械学会福祉工学シンポジウム2009講演論文集, 161-162, Sep. 2009.
148.	米津金吾, 原田敏司, 上田喜敏, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : ベッド高の相違による重量物持ち上げ動作時の筋疲労解析, 平成21年電気学会電子・情報・システム部門大会講演論文集, 701-704, Sep. 2009.
149.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : ヒトの心理特性と左前頭前野の活動との関連性に関する一考察, 平成21年電気学会電子・情報・システム部門大会講演論文集, 751-754, Sep. 2009.
150.	Katsuya SATO, 鎌田慧 and 南和幸 : Development of cell stretching micro device for in situ observation of stretched cell, 平成21年電気学会電子・情報・システム部門大会講演論文集, Vol.1, No.1, 71, Sep. 2009.
151.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : BCI構築のための個人特性とエゴグラムの関連性に関する一考察, 電気学会産業応用部門大会講演論文集, II-199-202, Sep. 2009.

Et cetera, Workshop:

1.	Katsuya SATO and Taira Eihara : Characteristics of osteoblasts calcium signaling response to micro-vibration stimuli, 6th Japan-Switzerland workshop on biomechanics (JSB2023), Vol.23-205, 78, Aug. 2023.
2.	萬代蘭丸, Ryota Kurozumi, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : ディープラーニングによる視覚障害者の識別, The Papers of Technical Meeting, IEE JAPAN, No.CT-17_52, 19-24, Jun. 2017. (Keyword) deep learning / Visually impaired person / Blind person / Independent travel
3.	永濱秀明, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 稲垣具志, 池田典弘 and 高橋和也 : 方向定位付きLED発光ブロックの敷設位置の検証, The Papers of Technical Meeting, IEE JAPAN, No.CT-16, 33-35, Dec. 2016.
4.	石橋樹, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 注意喚起ブロックの突起直径と間隔の違いによる方向定位性能の評価, The Papers of Technical Meeting, IEE JAPAN, No.CT-16, 13-16, Dec. 2016.
5.	山本宰, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 樫山直樹, 藤本陽亮 and 田中義浩 : 農作業補助具の開発及び装着時の評価, The Papers of Technical Meeting, IEE JAPAN, No.CT-16, 9-11, Dec. 2016.
6.	Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and Osamu Sueda : Research on Continuity between Each Assistive Device for Personal Mobility of Persons with Visually Impairment around Crossing., 電気学会研究会資料制御研究会, No.CT-16-032, 75-79, Mar. 2016. (Summary) Crossing an intersection is one of the most risky actions for a person with visually impairment. A visually impaired pedestrian is guided to the crosswalk entrance by the tactile walking surface indicators "TWSIs". TWSIs are necessary for persons with visually impairment to walk independently. Audible pedestrian signals are also necessary for them to cross intersections. TWSIs support approaching the intersection, and audible pedestrian signals support crossing the intersection. However, the support of audible pedestrian signals may not necessarily be related to the support of the TWSIs. This research sought to verify how visually impaired persons are guided by different positions where the audible pedestrian signals are set up. (Keyword) Tactile walking surface indicators / Audible pedestrian signals / Person with visually impairment / Veering distance / Cintinuity
7.	大嶋昇, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and 坊岡正之 : 介助用手動車いすのタイヤ空気圧調整時における振動計測, 電気学会研究会資料制御研究会, No.CT-16-013, 25-28, Jan. 2016.
8.	永濱秀明, 清山幹弘, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 稲垣具志, 池田典弘 and 高橋和哉 : 視覚障害者のための方向定位付きLED発光ブロックの実証実験, 電気学会研究会資料制御研究会, No.CT-16-010, 15-17, Jan. 2016.
9.	石橋樹, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 視覚障害者誘導用ブロックの方向提示性能の定量的評価, 電気学会研究会資料制御研究会, No.CT-16-009, 11-13, Jan. 2016.
10.	石橋樹, 吉村祥吾, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito and 前野哲哉 : 知的・精神障害者の作業分析に関する研究, 電気学会研究会資料制御研究会, Vol.CT15, No.134, 13-15, Sep. 2015.
11.	中島紘一, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 重度障害者を対象とした意思伝達装置に関する研究, 電気学会研究会資料制御研究会, Vol.CT15, No.133, 9-11, Sep. 2015.
12.	清山幹弘, Shoichiro Fujisawa, Katsuya SATO, Shin-ichi Ito, 稲垣具志, 池田典弘 and 高橋和哉 : 横断歩道口用発光ブロックの識別に関する研究, 電気学会研究会資料制御研究会, No.CT-15-021, 5-8, Mar. 2015.
13.	田辺猛, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : 破面合成法による道路交通騒音再現に関する研究, 電気学会研究会資料制御研究会, No.CT-14, 35-38, Mar. 2014.
14.	廣野恭平, Shin-ichi Ito, Katsuya SATO and Shoichiro Fujisawa : 交差点周辺の視覚障害者の単独歩行のための移動支援機器間の連続性, 電気学会研究会資料制御研究会, No.CT-14, 29-32, Mar. 2014.
15.	清山幹弘, 志賀大輔, 池田典弘, 高橋和哉, 稲垣具志, Katsuya SATO, Shin-ichi Ito and Shoichiro Fujisawa : 横断歩道口用発光ブロックの識別に関する研究, 電気学会研究会資料制御研究会, No.CT-14, 5-8, Mar. 2014.
16.	Katsuya SATO : 大学院博士前期課程における体験型環境教育の試み, Synposium on Engineering Education 2010 The University of Tokushima, 58-64, Mar. 2010.
17.	Takamaro Hamada, Kayoko Matsubara, Shin-ichi Ito, Katsuya SATO, Masayuki Booka, Hidehisa Oku and Shoichiro Fujisawa : ロービジョン者の歩行面の誤識別に関する研究, 産業計測制御研究会, 7-10, Mar. 2010.
18.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : 脳波の個人特性とユーザのエゴグラム得点との関連性, 産業計測制御研究会, 17-20, Mar. 2010.
19.	原田敏司, 米津金吾, 上田喜敏, Shoichiro Fujisawa, Katsuya SATO and Shin-ichi Ito : Measurement and fatigue analysis of the Musculus erector spinae EMG at the time of weight lifting, 第79回パターン計測部会研究会資料, 45-50, Jul. 2009.
20.	Shin-ichi Ito, Yasue Mitsukura, Katsuya SATO, Shoichiro Fujisawa and Minoru Fukumi : A Study on Pattern Classification of Left Prefrontal Cortex EEG, 第79回パターン計測部会研究会資料, 39-44, Jul. 2009.

Patent:

1.	Katsuya SATO, 南和幸 and 下野晃弘 : 細胞への伸展刺激負荷デバイス, 20083220 (Jan. 2008), 2009159925 (Jul. 2009), 4931017 (Feb. 2012).

Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)

Establishment of analytical technique of bone regeneration mechanism using MEMS array device vibrating cell (Project/Area Number: 22H01430 )
Development of vibration loading device for in situ observation of osteoblats response (Project/Area Number: 20K12601 )
Development of MEMS array device vibrating cell for elucidating a micro vibration effect in the bone reproduction on a cell scale. (Project/Area Number: 19K04273 )
Osteoblastic calcium signaling response to dynamic stretching stimuli (Project/Area Number: 17K01361 )
Evaluation of Orientation Performance of Tactile Walking Surface Indicators (Project/Area Number: 15K01458 )
Evaluation of relationship between dynamic cytoskeletal rearrangement and intracelluylar mechanical field by using in situ observation of stretched cell (Project/Area Number: 26350503 )
Mechanical interactive micro interface device with the single cell through the focus desmosome. (Project/Area Number: 25630094 )
Intelligent measurement and control of tissue collagen for bone tissue engineering (Project/Area Number: 25560200 )
Relationship between intracellular mechanical field and mechanosensors in stretched cell (Project/Area Number: 24760078 )
Research on continuity among assistive devices for personal mobility of persons with visually impairment around crossings (Project/Area Number: 24500646 )
Evaluation of mechanical field of cellular structure in stretched cell using real time in situ observation method (Project/Area Number: 21760081 )
Miss-recognition of Load Surface by The Low Vision (Project/Area Number: 21500516 )
微細加工技術を応用した単一細胞レベルでの力学刺激応答評価デバイスの開発 (Project/Area Number: 18700413 )
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Associate Professor : SATO, Katsuya

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Grants-in-Aid for Scientific Research (KAKEN Grants Database @ NII.ac.jp)