label: url

en: Using Machine Learning to Classify Information Related to Child Rearing of Infants from Twitter

en: Advances in Machine Learning & Artificial Intelligence


en: System to Correct Toxic Expression with BERT and to Determine the Effect of the Attention Value

en: This paper describes an extended experiment on a system that converts sentences with toxic expressions into safe sentences, along with the evaluation and influence of the system. In recent years, toxicity on social media has created many problems. We evaluated the effectiveness of the proposed system for identifying toxic sentences using a prediction model based on Bidirectional Encoder Representations from Transformers (BERT) and then converting them into safe sentences using attention values and a score that indicates whether the sentences are appropriate after the predictive conversion. Six patterns of methods were tested, with Pattern 6 being the most effective for mitigating toxicity. This pattern is a technique that changes the way to take the top sentences of a beam search for each number of treatments, in addition to converting words with an attention value above a threshold and their adjacent words and phrases and words registered in the toxic dictionary. We used multiple indicators to judge the effectiveness of this method and evaluated its ability to make the text safe while preserving its meaning.

en: Communications in Computer and Information Science


en: Determination of individual factors associated with hallux valgus using SVM-RFE

en: Introduction This cross-sectional study aimed to determine the factors related to hallux valgus (HV) and their importance using support vector machine-recursive feature elimination (SVM-RFE). Methods A total of 864 participants aged 18 years were enrolled. The Manchester scale was used to determine the presence of HV (summed scores for both feet 4). The questionnaire included items such as age, sex, height, weight, and foot measurements. These internal factors were analyzed to determine if they are related to HV using SVM-RFE. Results The results of tenfold cross-validation using SVM-RFE revealed that the numbers of feature selections were 10, 10, and 9 for age, sex, and body weight, respectively, and these factors were shown to be related to HV. HV was found to be more common in women than in men (women, 24.9%; men, 7.6%), but the sex difference was not significant in older people. Conclusion Age and sex were found to be important factors associated with HV identified via feature selection using SVM-RFE.

en: BMC Musculoskeletal Disorders

ja: BMC Musculoskeletal Disorders


en: Trend Prediction Based on Multi-Modal Affective Analysis from Social Networking Posts

en: This paper propose a method to predict the stage of buzz-trend generation by analyzing the emotional information posted on social networking services for multimodal information, such as posted text and attached images, based on the content of the posts. The proposed method can analyze the diffusion scale from various angles, using only the information at the time of posting, when predicting in advance and the information of time error, when used for posterior analysis. Specifically, tweets and reply tweets were converted into vectors using the BERT general-purpose language model that was trained in advance, and the attached images were converted into feature vectors using a trained neural network model for image recognition. In addition, to analyze the emotional information of the posted content, we used a proprietary emotional analysis model to estimate emotions from tweets, reply tweets, and image features, which were then added to the input as emotional features. The results of the evaluation experiments showed that the proposed method, which added linguistic features (BERT vectors) and image features to tweets, achieved higher performance than the method using only a single feature. Although we could not observe the effectiveness of the emotional features, the more emotions a tweet and its reply match had, the more empathy action occurred and the larger the like and RT values tended to be, which could ultimately increase the likelihood of a tweet going viral.

ja: 本論文では，SNS上の投稿テキストや添付画像などのマルチモーダル情報を対象に，投稿内容から感情情報を分析し，バズや流行の発生のレベルを予測する手法を提案する．提案手法は，事前予測に用いる場合は投稿時の情報のみを用い，事後分析に用いる場合は時間誤差の情報を用いて，様々な角度から拡散スケールを分析することが可能である．具体的には，事前に学習させた汎用言語モデルBERTを用いてツイートと返信ツイートをベクトル化し，添付画像を学習させた画像認識用ニューラルネットワークモデルを用いて特徴ベクトルに変換する．また，投稿内容の感情情報を解析するために，独自の感情解析モデルを用いて，ツイート，返信ツイート，画像特徴から感情を推定し，感情特徴として入力に追加する．評価実験の結果，ツイートに言語特徴(BERTベクトル)と画像特徴を付加した提案手法は，単一特徴のみを用いた手法と比較して高い性能を達成することができた．感情特徴量の効果を明確に観測することはできなかったが，考察及び分析の結果，ツイートとその返信の一致する感情が多いほど，共感行動が発生し，いいねやRTの値が大きくなる傾向があり，結果的にツイートがバイラル化する可能性が高くなると考えられる．

en: Electronics

ja: Electronics


en: Extraction of Lifestyle Habits Described in Blogs of Diabetics

ja: 糖尿病患者のブログに記述された生活習慣の抽出

en: Tackling diabetes, an increasingly common lifestyle-related illness, requires information on patients lifestyle and habits. Blogs maintained by patients afflicted with the incurable illness may be useful for analyzing how lifestyle affects health-status. In this paper, we propose an intrinsic expression extractor that extracts keywords related to lifestyle and health-status from blogs of patients diagnosed with type-2 diabetes. To counter class imbalance and add to the corpus, the proposed method tags each keyword with information based on cue-words extracted from manually tagged data. The named-entity recognition (NER) for the extracted keywords uses a bidirectional gated recurrent unit neural network (BiGRU) and was evaluated for accuracy by cross-validation. We obtained F1-score of approximately 0.76. Although the accuracy of extraction can further be improved, the novel approach has applications in analyzing and improving the lifestyle of diabetes-afflicted patients.

ja: 本研究は難病患者の闘病活動における生活習慣の維持や管理を支援するシステムを構築するための一歩として，糖尿病患者の生活習慣(食事，睡眠，運動など)や病状(血圧，体調など)に関連したキーワードの抽出を目指す．糖尿病の闘病患者のブログデータを収集し，そこから双方向ゲート付きリカレントユニット(GRU)を用いて生活習慣や病状に関連したキーワードの自動抽出を行う．

en: IEEJ Transactions on Electronics, Information and Systems

ja: 電気学会論文誌C (電子，情報，システム部門誌)


en: Development of an AI-based Dental Support System for Panoramic X-ray Images

ja: AIを用いたパノラマX線画像からのカルテ入力支援システムの開発

en: Research and development of AI-based diagnostic systems in the medical and dental fields is flourishing worldwide. However, there are few practical dental support systems and dental databases. Support for medical record input is needed to reduce the burden at diagnosis. We have been developing a dental database with detailed annotation information and building an AI system for automatic teeth detection, teeth numbering, teeth contour estimation, and disease diagnosis from panoramic X-ray images since 2019. Three dentists and one expert of dental radiology created our database, which includes teeth number based on FDI method, coordinates of teeth contour, and various dental conditions, using Anotee, a software developed for creating dental databases. Our system consists of multiple deep neural networks that were trained using 1,781 panoramic X-ray images and annotations, which excluded deciduous teeth and rare dental conditions. The deep neural network to classify dental conditions is based on EfficientNetV2-S and can diagnose multiple dental conditions. To verify our systems usefulness, we evaluated two dental condition classifications for 20 dental conditions and 10 dental conditions such as caries, periodontitis, root canal filling, inlay, composite resin, crown, pontic, implant, and impacted tooth. We performed 5-fold cross validation and calculated precision, sensitivity, and specificity. Experimental results were encouraging. For the diagnosis of 20 conditions, precision was 90.4%, sensitivity was 86.1%, and specificity was 99.4%; for the diagnosis of 10 conditions, precision was 92.9%, sensitivity was 90.0%, and specificity was 99.1%. The system achieved high accuracy, suggesting that AI systems are useful in assisting medical record input support.

ja: 我々は従来の診断支援に関する技術をカルテ入力支援に応用するために，詳細なアノテーションを付与した歯科データベースの構築と，パノラマ X 線画像を対象としたカルテ入力支援システムの研究開発を行ってきた．本システムは，歯検出ニューラルネットワーク，セグメンテーションニューラルネットワーク，状態診断ニューラルネットワークを用いて，パノラマ X 線画像から，歯の検出，歯式推定，歯の輪郭推定および歯の状態診断を行うことができる．本システムとパノラマ X 線画像ビューアおよび電子カルテ(レセコン)を連携することでカルテの自動入力を可能にするため，歯科医のカルテ作成に必要な労力を軽減し，診断全体 の効率化に貢献することができる．また歯科医の画像診断に AI の画像診断が加わることで画像診断における見落としを防ぐことも期待できる．ただし最終的なカルテの確定は歯科医が視診等を踏まえた診断のあとにカルテを修正して行うため，本システムは確定診断のために用いるものではなく，画像から明確に判断できうる情報を AI が事前に自動入力することを目的としている．本論文では本システムの有用性を検討するために，構築したデータベースとデータ作成のプロセスについて述べ，歯の状態診断に対する精度評価を行う．また AI システムと専門医の診断結果の比較を行う．

en: Dental Radiology

ja: 歯科放射線


en: Emotional Similarity Word Embedding Model for Sentiment Analysis

en: We propose a method for constructing a dictionary of emotional expressions, which is an indispensable language resource for sentiment analysis in the Japanese. Furthermore, we propose a method for constructing a language model that reproduces emotional similarity between words, which to date has yet not been considered in conventional dictionaries and language models. In the proposed method, we pretrained sentiment labels for the distributed representations of words. An intermediate feature vector was obtained from the pre-trained model. By learning an additional semantic label on this feature vector, we can construct an emotional semantic language model that embeds both emotion and semantics. To confirm the effectiveness of the proposed method, we conducted a simple experiment to retrieve similar emotional words using the constructed model. The results of this experiment showed that the proposed method can retrieve similar emotional words with higher accuracy than the conventional word-embedding model.

en: Computacion y Sistemas

ja: Computacion y Sistemas


en: Analyzing Transformers via Value Matrices

ja: Value行列を手掛かりとした Transformerの分析

en: Transactions of the Japanese Society for Artificial Intelligence

ja: 人工知能学会論文誌