89 results on '"Yuki Matsuda"'
Search Results
2. Important Notes for Preventing Entrapment of Distal Filter-based Embolic Protection Device in Carotid Artery Stenting
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Juntaro FUJITA, Nobuyuki HIROTSUNE, Yuki MATSUDA, Osamu HAMASAKI, Shoichi FUKUDA, Yoshihiro OKADA, Aiko KOBASHI, Shohei NISHIGAKI, Keigo MAKINO, Yusuke TOMITA, Naoya KIDANI, Kenichiro MURAOKA, and Shigeki NISHINO
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carotid artery stenting ,distal filter-based embolic protection device ,complication ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Failure to retrieve a distal filter-based embolic protection device (EPD) is a potential complication of carotid artery stenting. This may be caused by trapping of the proximal marker of the EPD within the stent tip marker. Maintaining an adequate distance between the two can prevent this. We examined the behavior of several stent-filter-based EPD combinations, focusing on their propensity to become trapped or disengage in vitro. Four physicians subjectively rated the force required to result in trapping using a 5-point scale. Moreover, the force required to disengage trapped devices was evaluated. The Casper stent-Spider FX EPD combination was difficult to disengage when entrapment occurred, which suggested that this phenomenon tended to occur with this combination. The stent tip marker of the closed-cell stents advanced as they shortened, which may be a unique feature of closed-cell stents. Although trapping is uncommon, it can cause serious complications. To prevent these complications, device characteristics should be well understood before they are used in patients.
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- 2024
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3. Newer antidepressant for Japanese adults with major depressive disorder: A systematic review and meta‐analysis
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Taro Kishi, Kenji Sakuma, Masakazu Hatano, Yuki Matsuda, Satoru Esumi, Nobumi Miyake, Itaru Miura, Hikaru Hori, Masaki Kato, and Nakao Iwata
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efficacy ,Japanese major depressive disorder ,newer antidepressant ,safety ,systematic review and meta‐analysis ,Therapeutics. Pharmacology ,RM1-950 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Introduction The question remains to be elucidated: “Is treatment with antidepressants at doses approved in Japan effective for Japanese patients with MDD?” It is crucial to confirm this in order to provide appropriate treatments for Japanese patients with major depressive disorder (MDD). Therefore, we conducted a systematic review and random‐effects pairwise meta‐analysis including these nine double‐blind, randomized, placebo‐controlled trials. Methods We calculated the standardized mean difference (SMD) and risk ratio (RR) with a 95% confidence interval (95% CI). Results Pooled newer antidepressants outperformed placebo regarding improvement of depressive symptom scale scores [SMD (95% CI) = −0.20 (−0.27, −0.12), p
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- 2024
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4. Aromug: A Mug-Type Olfactory Interface to Enhance the Sweetness Perception of Beverages
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Daiki Mayumi, Yugo Nakamura, Yuki Matsuda, Shinya Misaki, and Keiichi Yasumoto
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Olfaction ,olfactory interfaces ,olfactory display ,scents ,taste evaluation ,smell ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Sugary beverages are a significant contributor to sugar consumption, and their excessive consumption is associated with increased risks of elevated blood glucose levels and diabetes. Many individuals have a strong preference for sugary beverages and often find beverages with lower sugar content to be less satisfying. Attempts to switch to less sugary options are frequently short-lived, leading to a return to higher-sugar beverages. Recognizing that 75 – 95% of taste perception is influenced by scent, we investigated a scent-based approach to reduce sugar intake while preserving the perception of sweetness. This study introduces an olfactory interface in the form of a mug named “Aromug,” designed to emit a sweet scent in sync with the drinking action. Aromug incorporates motion sensing and scent presentation functions to enhance the perceived sweetness of a beverage, thereby encouraging a gradual reduction in sugar intake. Our experiments, involving 33 participants, demonstrated that the combined scents of sugar-free coffee and chocolate increased the perception of sweetness (p $= 1.641 \times 10^{-2}$ ). The study also found that the simultaneous presentation of scent and visual cues improved taste satisfaction and sweetness perception. Additionally, we observed variations in sweetness preference related to age and frequency of coffee consumption. It was particularly observed that people in their 20s and those who frequently drink coffee tend to perceive the taste of beverages as sweeter. This suggests a potential for Aromug to customize the scent experience based on individual preferences, offering a novel way to encourage healthier beverage choices.
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- 2024
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5. Enhancing Reflective and Conversational User Engagement in Argumentative Dialogues with Virtual Agents
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Annalena Aicher, Yuki Matsuda, Keichii Yasumoto, Wolfgang Minker, Elisabeth André, and Stefan Ultes
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non-verbal agent behavior ,virtual agents ,co-speech gestures ,user interest ,confirmation bias ,self-imposed filter bubbles (SFB) ,Technology ,Science - Abstract
In their process of information seeking, human users tend to selectively ignore information that contradicts their pre-existing beliefs or opinions. These so-called “self-imposed filter bubbles” (SFBs) pose a significant challenge for argumentative conversational agents aiming to facilitate critical, unbiased opinion formation on controversial topics. With the ultimate goal of developing a system that helps users break their self-imposed filter bubbles (SFBs), this paper aims to investigate the role of co-speech gestures, specifically examining how these gestures significantly contribute to achieving this objective. This paper extends current research by examining methods to engage users in cooperative discussions with a virtual human-like agent, encouraging a deep reflection on arguments to disrupt SFBs. Specifically, we investigate the agent’s non-verbal behavior in the form of co-speech gestures. We analyze whether co-speech gestures, depending on the conveyed information, enhance motivation, and thus conversational user engagement, thereby encouraging users to consider information that could potentially disrupt their SFBs. The findings of a laboratory study with 56 participants highlight the importance of non-verbal agent behaviors, such as co-speech gestures, in improving users’ perceptions of the interaction and the conveyed content. This effect is particularly notable when the content aims to challenge the user’s SFB. Therefore, this research offers valuable insights into enhancing user engagement in the design of multimodal interactions with future cooperative argumentative virtual agents.
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- 2024
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6. Neuroinflammatory Alterations in Treatment‐Resistant Depression Secondary to Long COVID by Repetitive Transcranial Magnetic Stimulation (rTMS): A Case Report
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Shun Igarashi, Kyoji Okita, Daisuke Hayashi, Ryuichi Yamazaki, Yuki Matsuda, Takamasa Noda, Koichiro Watanabe, and Shinsuke Kito
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Psychiatry ,RC435-571 - Published
- 2024
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7. Maintenance repetitive transcranial magnetic stimulation (rTMS) therapy for treatment-resistant depression: a study protocol of a multisite, prospective, non-randomized longitudinal study
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Ryuichi Yamazaki, Yuki Matsuda, Mari Oba, Hideki Oi, and Shinsuke Kito
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Repetitive transcranial magnetic stimulation ,Maintenance therapy ,Major depressive disorder ,Relapse prevention ,Psychiatry ,RC435-571 - Abstract
Abstract Background Repetitive transcranial magnetic stimulation (rTMS) is a widely used treatment for major depressive disorder (MDD), and its effectiveness in preventing relapse/recurrence of MDD has been explored. Although few small sample controlled studies exist, the protocols of maintenance rTMS therapy were heterogeneous and evidence of its effectiveness is not sufficient. Thus, this study aims to evaluate whether maintenance rTMS is effective in maintaining the treatment response in patients with MDD with a large sample size and feasible study design. Methods In this multicenter open-labelled parallel-group trial we plan to recruit 300 patients with MDD who have responded or remitted to acute rTMS therapy. Participants would be classified into two groups according to their preference; the maintenance rTMS and pharmacotherapy group, and the pharmacotherapy only group. The protocol of maintenance rTMS therapy is once a week for the first six months and once biweekly for the second six months. The primary outcome is the relapse/recurrence rates during 12 months following enrollment. Other measures of depressive symptoms and recurrence/relapse rates at different time points are the secondary outcomes. The primary analysis is the between-group comparison adjusted for background factors using a logistic regression model. We will perform the group comparison with inverse probability of treatment weighting as the sensitivity analysis to ensure the comparability of the two groups. Discussion We hypothesize that maintenance rTMS therapy could be an effective and safe treatment for preventing depressive relapse/recurrence. Considering the limitation of potential bias owing to the study design, we plan to use statistical approaches and external data to avoid overestimation of the efficacy. Trial registration Japan Registry of Clinical Trials, ID: jRCT1032220048 . Registered 1 May 2022.
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- 2023
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8. Repetitive transcranial magnetic stimulation for preventing relapse in antidepressant treatment-resistant depression: A systematic review and meta-analysis of randomized controlled trials
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Yuki Matsuda, Kenji Sakuma, Taro Kishi, Kosei Esaki, Shinsuke Kito, Masahiro Shigeta, and Nakao Iwata
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Continuation repetitive transcranial magnetic stimulation ,Relapse ,Antidepressant treatment-resistant depression ,Systematic review and meta-analysis ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Published
- 2023
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9. Garbage Content Estimation Using Internet of Things and Machine Learning
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Eunice Likotiko, Yuki Matsuda, and Keiichi Yasumoto
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IoT-based smart garbage system ,garbage content estimation ,machine learning algorithms ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Much garbage is produced daily in homes due to living activities, including cooking and eating. The garbage must be adequately managed for human well-being and environmental protection. Although the existing IoT-based smart garbage systems have gained high garbage classification accuracy, they still have a problem that they provide a small number of garbage categories, not enough for reasonable practices of household garbage separation. This study presents a new smart garbage bin system, SGBS, embedded with multiple sensors to solve the problem. We deployed temperature, humidity, and gas sensors to know the condition and identify the garbage content disposed of. Then, we introduce a new garbage content estimation method by training a machine learning model using daily collected fuse sensor readings combined with detailed household garbage contents annotations to perform garbage classification tasks. For evaluation, we deployed the designed SGBS in five households over one month. As a result, we confirmed that the leave-one-house cross-validation results showed an accuracy of 91% in 5 kitchen waste contents, also, 89% in 5 paper/softbox contents, and 85% in the 8 garbage categories for the classification tasks.
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- 2023
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10. Genomic adaptive potential to cold environments in the invasive red swamp crayfish
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Daiki X. Sato, Yuki Matsuda, Nisikawa Usio, Ryo Funayama, Keiko Nakayama, and Takashi Makino
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Zoology ,Genetics ,Evolutionary biology ,Science - Abstract
Summary: Biological invasion refers to the introduction, spread, and establishment of non-native species in a novel habitat. The ways in which invasive species successfully colonize new and different environments remain a fundamental topic of research in ecology and evolutionary biology. Here, we investigated the genomic and transcriptomic characteristics of the red swamp crayfish (Procambarus clarkii), a widespread invader in freshwater environments. Targeting a recently colonized population in Sapporo, Japan that appears to have acquired a high degree of cold tolerance, RNA-seq analysis revealed differentially expressed genes in response to cold exposure, and those involved in protease inhibitors and cuticle development were considered top candidates. We also found remarkable duplications for these gene families during evolution and their concerted expression patterns, suggesting functional amplification against low temperatures. Our study thus provides clues to the unique genetic characteristics of P. clarkii, possibly related to cold adaptation.
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- 2023
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11. Transcranial magnetic stimulation modalities for psychiatric disorders: Publication trends from 1985 to 2019
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Yuki Matsuda, Ryuichi Yamazaki, Masahiro Shigeta, and Shinsuke Kito
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major depressive disorder ,psychiatric disorder ,research publication trends ,transcranial magnetic stimulation ,transcranial magnetic stimulation modality ,Therapeutics. Pharmacology ,RM1-950 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Aim Transcranial magnetic stimulation (TMS) is a noninvasive brain stimulation technique that shows potential for treating psychiatric disorders. Although several studies have sought to investigate new TMS modalities for the treatment of various psychiatric disorders, no study has yet examined publication trends in research on TMS modalities for psychiatric disorders. This study investigated publication trends in TMS research for 13 psychiatric disorders, including addiction, dementia, major depressive disorder (MDD), and obsessive‐compulsive disorder (OCD), and schizophrenia, as well as 9 TMS modalities, including bilateral stimulation, deep TMS, high‐frequency stimulation, low‐frequency stimulation, and theta burst stimulation. Methods Articles published in PubMed from 1985 to 2019 were searched to determine the number of published articles for each year in each category using the “Results by year” tool from the PubMed database. Results Over the past 30 years, an increasing number of articles were published regarding TMS research for the treatment of MDD, addiction, and dementia, which were among those most commonly investigated psychiatric disorders, whereas the number of articles addressing schizophrenia and OCD treated via TMS remained steady since 2015. Regarding TMS modalities, previous high‐frequency stimulation, low‐frequency stimulation, and bilateral stimulation were the most common topics, with research regarding deep TMS and theta burst stimulation having increased since 2000 and 2005, respectively. Conclusion TMS applications are rapidly developing and becoming increasingly ubiquitous in various psychiatric disorders. Determining publication trends in TMS research can be a useful method for monitoring TMS research interests and applications of new TMS modalities for psychiatric disorders.
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- 2021
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12. Development of Machine Learning-Based Web System for Estimating Pleural Effusion Using Multi-Frequency Bioelectrical Impedance Analyses
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Daisuke Nose, Tomokazu Matsui, Takuya Otsuka, Yuki Matsuda, Tadaaki Arimura, Keiichi Yasumoto, Masahiro Sugimoto, and Shin-Ichiro Miura
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heart failure ,impedance ,device ,estimation system ,machine learning ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Transthoracic impedance values have not been widely used to measure extravascular pulmonary water content due to accuracy and complexity concerns. Our aim was to develop a foundational model for a novel system aiming to non-invasively estimate the intrathoracic condition of heart failure patients. Methods: We employed multi-frequency bioelectrical impedance analysis to simultaneously measure multiple frequencies, collecting electrical, physical, and hematological data from 63 hospitalized heart failure patients and 82 healthy volunteers. Measurements were taken upon admission and after treatment, and longitudinal analysis was conducted. Results: Using a light gradient boosting machine, and a decision tree-based machine learning method, we developed an intrathoracic estimation model based on electrical measurements and clinical findings. Out of the 286 features collected, the model utilized 16 features. Notably, the developed model demonstrated high accuracy in discriminating patients with pleural effusion, achieving an area under the receiver characteristic curves (AUC) of 0.905 (95% CI: 0.870–0.940, p < 0.0001) in the cross-validation test. The accuracy significantly outperformed the conventional frequency-based method with an AUC of 0.740 (95% CI: 0.688–0.792, and p < 0.0001). Conclusions: Our findings indicate the potential of machine learning and transthoracic impedance measurements for estimating pleural effusion. By incorporating noninvasive and easily obtainable clinical and laboratory findings, this approach offers an effective means of assessing intrathoracic conditions.
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- 2023
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13. Estimating Subjective Argument Quality Aspects From Social Signals in Argumentative Dialogue Systems
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Niklas Rach, Yuki Matsuda, Stefan Ultes, Wolfgang Minker, and Keiichi Yasumoto
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Computational argumentation ,argument quality estimation ,argumentative dialogue systems ,social signal extraction ,machine learning ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Information about a subjective user opinion towards an argument is crucial for argumentative systems in order to present appropriate content and adapt their behaviour to the individual user. However, requesting explicit feedback regarding the discussed arguments is often impractical and can hinder the interaction. To address this issue, we investigate the automatic recognition of user opinions towards arguments that are presented by means of a virtual avatar from social signals. We focus on two different user opinion categories (convincing and interesting) and two different types of social signals (facial expressions and eye movement). The recognition is addressed as a supervised learning problem and realized using the argument search evaluation data discussed in previous work. The overall performance is compared to a human annotation on a subset of the collected data. The results show that the machine learning performance is similar to human performance in both recognition tasks.
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- 2021
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14. Exploring the Impacts of Elaborateness and Indirectness in a Behavior Change Support System
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Zhihua Zhang, Juliana Miehle, Yuki Matsuda, Manato Fujimoto, Yutaka Arakawa, Keiichi Yasumoto, and Wolfgang Minker
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Behavior change ,communication styles ,physical activity ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Numerous technologies exist for promoting a healthier lifestyle. These technologies collectively referred to as “Behavior Change Support Systems”. However, the majority of existing apps use quantitative data representation. Since it is difficult to understand the meaning behind quantitative data, this approach has been suggested to lower users’ motivation and fail to promote behavior change. Therefore, an interpretation of quantitative data needs to be provided as a supplement. However, different descriptions of the same data may lead to different outcomes. In this paper, we explore the impact of different communication styles for interpretations of quantitative data on behavior change by developing and evaluating Walkeeper – a web-based app that provides interpretations of the users’ daily step counts using different levels of elaborateness and indirectness with the aim of promoting walking. Through the quantitative analysis and results of a user study, we contribute new knowledge on designing such interpretations for quantitative data.
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- 2021
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15. Adsorption separation of heavier isotope gases in subnanometer carbon pores
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Sanjeev Kumar Ujjain, Abhishek Bagusetty, Yuki Matsuda, Hideki Tanaka, Preety Ahuja, Carla de Tomas, Motomu Sakai, Fernando Vallejos-Burgos, Ryusuke Futamura, Irene Suarez-Martinez, Masahiko Matsukata, Akio Kodama, Giovanni Garberoglio, Yury Gogotsi, J. Karl Johnson, and Katsumi Kaneko
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Science - Abstract
Separation of isotopes of heavier gases than hydrogen or helium is essential for biomedical applications, but current methods are very energy and time consuming. Here the authors report cryogenic separation of oxygen and methane isotopes through adsorption in nanoporous materials, based on a collective nuclear quantum effect.
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- 2021
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16. Detection of Careless Responses in Online Surveys Using Answering Behavior on Smartphone
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Masaki Gogami, Yuki Matsuda, Yutaka Arakawa, and Keiichi Yasumoto
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Answering behavior ,careless response ,online questionnaire ,satisficing ,smartphone ,supervised machine learning ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Some respondents make careless responses due to the “satisficing,” which is an attempt to complete a questionnaire as quickly and easily as possible. To obtain results that reflect a fact, detecting satisficing and excluding the responses with satisficing from the analysis targets are required. One of the devised methods detects satisficing by adding questions that check violations of instructions and inconsistencies. However, this approach may cause respondents to lose their motivation and prompt them to satisficing. Additionally, a deep learning model that automatically answers these questions was reported. This threatens the reliability of the conventional method. To detect careless responses without inserting such screening questions, machine learning (ML) detection using data obtained from answer results was attempted in a previous study, with a detection rate of 55.6%, which is not sufficient from the viewpoint of practicality. Therefore, we hypothesized that a supervised ML model with a higher detection rate could be constructed by using on-screen answering behavior as features. However, (1) no existing questionnaire system can record on-screen answering behavior and (2) even if the answering behavior can be recorded, it is unclear which answering behavior features are associated with satisficing. We developed an answering behavior recording plug-in for LimeSurvey, an online questionnaire system used all over the world, and collected a large amount of data (from 5,692 people) in Japan. Then, a variety of features were examined and generated from answering behavior, and we constructed ML models to detect careless responses. We call this detection method the ML-ABS (ML-based answering behavior scale). Evaluation by cross-validation demonstrated that the detection rate for careless responses was 85.9%, which is much higher than the previous ML method. Among the various features we proposed, we found that reselecting the Likert scale and scrolling particularly contributed to the detection of careless responses.
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- 2021
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17. Repetitive transcranial magnetic stimulation for residual depressive symptoms after electroconvulsive therapy in an elderly patient with treatment‐resistant depression
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Yuki Matsuda, Rema Terada, Kodai Yamada, Ryuichi Yamazaki, Akihiko Nunomura, Masahiro Shigeta, and Shinsuke Kito
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Psychiatry ,RC435-571 - Published
- 2022
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18. Effectiveness of high‐frequency left prefrontal repetitive transcranial magnetic stimulation in patients with treatment‐resistant depression: A randomized clinical trial of 37.5‐minute vs 18.75‐minute protocol
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Shinsuke Kito, Midori Miyazi, Honoka Nakatani, Yuki Matsuda, Ryuichi Yamazaki, Tatsuya Okamoto, and Yoshio Igarashi
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depression ,PHQ‐9 ,Quick Inventory of Depressive Symptomatology ,repetitive transcranial magnetic stimulation ,stimulation protocol ,Therapeutics. Pharmacology ,RM1-950 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Aim Clinical trials and meta‐analyses have demonstrated the efficacy of high‐frequency repetitive transcranial magnetic stimulation (rTMS) over the left prefrontal cortex in treatment‐resistant depression. The aim of this study was to prospectively evaluate the effectiveness of the conventional 37.5‐minute vs 18.75‐minute rTMS protocol over the left prefrontal cortex in patients with treatment‐resistant depressive episode. Methods Thirty patients with treatment‐resistant depression or bipolar disorder depressive episode were randomized 1:1 to either 37.5‐minute or 18.75‐minute rTMS protocol groups. rTMS treatment was applied at 120% resting motor threshold with 10 Hz over the left prefrontal cortex. Treatment sessions were delivered for a total of 3000 pulses/d, 5 days a week, for 4‐6 weeks. Patients received a 75 trains with “4 sec on and 26 sec off” for 37.5 minutes or a 75 trains with “4 sec on and 11 sec off” for 18.75 minutes. Severity of depression was rated with the Quick Inventory of Depressive Symptomatology (QIDS) and Patient Health Questionnaire (PHQ‐9). Remission was defined as a total score of 5 or less on the QIDS. The primary outcome measure was to compare the remission rate between the both groups. Results Thirteen of 30 patients (43.3%) showed remission at week 6. There were no significant differences in the remission rate between the conventional 37.5‐ and 18.75‐minute protocol groups (46.7% and 40.0%, respectively). No seizures or treatment‐emergent mania/hypomania were occurred. Conclusion These findings suggest that, compared with the conventional one, rTMS with 18.75‐minute protocol might be equally effective and clinically beneficial in saving the treatment session length. Further well‐designed studies are needed.
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- 2019
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19. Efficacy and safety of lithium and lamotrigine for the maintenance treatment of clinically stable patients with bipolar disorder: A systematic review and meta‐analysis of double‐blind, randomized, placebo‐controlled trials with an enrichment design
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Kazuto Oya, Kenji Sakuma, Satoru Esumi, Yasuhiko Hashimoto, Masakazu Hatano, Yuki Matsuda, Yuki Matsui, Nobumi Miyake, Ikuo Nomura, Makoto Okuya, Nakao Iwata, Masaki Kato, Ryota Hashimoto, Kazuo Mishima, Norio Watanabe, and Taro Kishi
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bipolar disorder ,lamotrigine ,lithium ,meta‐analysis ,systematic review ,Therapeutics. Pharmacology ,RM1-950 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Aim Whether patients with adult bipolar disorder (BD) who have been clinically stabilized with lithium or lamotrigine should continue this medication is not established fully. This systematic review and meta‐analysis evaluated the efficacy and safety of lithium and lamotrigine for maintenance treatment in clinically stable patients with adult BD. Methods This meta‐analysis included only double‐blind, randomized, placebo‐controlled trials with an enrichment design that selected patients who responded acutely to lithium or lamotrigine. Reports prior to November 15, 2018, were retrieved from the PubMed/Cochrane Library/Embase. The primary outcome was the relapse rate due to any mood episode at the study endpoint. Other outcomes were relapse rates due to a manic/hypomanic/mixed episode or depression at the study endpoint, discontinuation rate, death, and death by suicide. Risk ratios (RRs) (95% confidence intervals) were calculated. When the random‐effects model showed significant differences between groups, the number‐needed‐to‐treat (NNT) was estimated. Results The search retrieved two studies regarding lithium (N = 218) and four evaluating lamotrigine (N = 706). Both drugs were superior to placebo for reducing the relapse rate due to any mood episode [lithium: RR = 0.52 (0.41‐0.66), P
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- 2019
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20. Quetiapine extended‐release vs olanzapine for Japanese patients with bipolar depression: A Bayesian analysis
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Taro Kishi, Toshikazu Ikuta, Yuki Matsuda, and Nakao Iwata
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Bayesian analysis ,bipolar depression ,Japanese ,olanzapine ,quetiapine extended‐release ,Therapeutics. Pharmacology ,RM1-950 ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Abstract Objective It is unknown whether there are differences in efficacy and safety between quetiapine extended‐release, 300 mg/d (QUEXR300), and olanzapine, 5‐20 mg/d (OLA), for Japanese patients with bipolar depression. Methods We conducted a Bayesian analysis of data from phase 3 studies in Japan of QUEXR300 and OLA. Outcomes were remission rate (primary), response rate, improvement on the Montgomery‐Åsberg Depression Rating Scale and 17‐item Hamilton Depression Rating Scale scores, discontinuation rate, and incidence of individual adverse events. We calculated the standardized mean difference (SMD) and the risk ratio (RR) and 95% credible interval (95% CrI) for continuous and dichotomous data, respectively. Results There were no significant differences between QUEXR300 and OLA for any of the efficacy outcomes. QUEXR300 was associated with a higher incidence of somnolence than OLA (RR = 5.517; 95% CrI = 1.563, 19.787), while OLA was associated with greater increase body weight (SMD = −0.488; 95% CrI = −0.881, −0.089) and blood prolactin levels (SMD = −0.642; 95% CrI = −1.073, −0.213) than QUEXR300, and a greater decrease in high‐density lipoprotein cholesterol levels (SMD = −0.408; 95% CrI = −0.785, −0.030) than QUEXR300. Conclusion Although the two drugs’ efficacy did not differ, OLA increased the risk of metabolic syndrome and QUEXR300 the risk of somnolence. A large scale, long‐term, head‐to‐head comparison study of QUEXR300 vs OLA for Japanese patients with bipolar depression is needed to confirm the results of the current study.
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- 2019
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21. PATROL: Participatory Activity Tracking and Risk Assessment for Anonymous Elderly Monitoring
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Research Dawadi, Teruhiro Mizumoto, Yuki Matsuda, and Keiichi Yasumoto
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elderly monitoring ,successful aging ,mobile application ,gerontechnology ,Chemical technology ,TP1-1185 - Abstract
There has been a subsequent increase in the number of elderly people living alone, with contribution from advancement in medicine and technology. However, hospitals and nursing homes are crowded, expensive, and uncomfortable, while personal caretakers are expensive and few in number. Home monitoring technologies are therefore on the rise. In this study, we propose an anonymous elderly monitoring system to track potential risks in everyday activities such as sleep, medication, shower, and food intake using a smartphone application. We design and implement an activity visualization and notification strategy method to identify risks easily and quickly. For evaluation, we added risky situations in an activity dataset from a real-life experiment with the elderly and conducted a user study using the proposed method and two other methods varying in visualization and notification techniques. With our proposed method, 75.2% of the risks were successfully identified, while 68.5% and 65.8% were identified with other methods. The average time taken to respond to notification was 176.46 min with the proposed method, compared to 201.42 and 176.9 min with other methods. Moreover, the interface analyzing and reporting time was also lower (28 s) in the proposed method compared to 38 and 54 s in other methods.
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- 2022
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22. Technical notes on deploying a LVIS stent – The importance of push and pull passively depending on the catheter torque
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Yu Okuma, Nobuyuki Hirotsune, Yuta Sotome, Yasuhito Kegoya, Yuki Matsuda, Yu Sato, Ittetsu Kin, Hayato Takeuchi, Tomoyuki Tanabe, Kenichiro Muraoka, Shigeki Nishino, and Shigeru Daido
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Low-profile visualized intraluminal support (LVIS) ,Dry lab training ,Incomplete stent deployment ,Surgery ,RD1-811 ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Objective: Low-profile visualized intraluminal support (LVIS®) is a braided stent utilized for stent-assisted coil embolization of intracranial aneurysms. In this report, we review the technical notes of coil embolization for unruptured intracranial aneurysm using LVIS® stents. Case description: We reported six consecutive cases of unruptured saccular aneurysm of the internal carotid artery all of whom underwent stent-assisted coil embolization with the LVIS® stent. After the first three cases, dry lab training using a complicated parent artery model allowed us to determine how to effectively place an LVIS® stent and to shorten operative time significantly. All patients were followed up for at least 1 year after the procedure. Thus far, none of the patients have experienced recurrence or complications. Conclusions: Our experience with patients undergoing stent-assisted coil embolization using LVIS® stents before and after dry lab training reveal that several simple technical tips, including careful measurement of the parent artery diameter, choice of an appropriate stent size, and evasion of pushing or pulling the stent beyond what is necessary, are important for easy and stable deployment of LVIS® stents.
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- 2021
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23. Explorations on Growth of Blue-Green-Yellow-Red InGaN Quantum Dots by Plasma-Assisted Molecular Beam Epitaxy
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Xue Zhang, Zhiwei Xing, Wenxian Yang, Haibing Qiu, Ying Gu, Yuta Suzuki, Sakuya Kaneko, Yuki Matsuda, Shinji Izumi, Yuichi Nakamura, Yong Cai, Lifeng Bian, Shulong Lu, and Atsushi Tackeuchi
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InGaN quantum dots ,self-assembled growth ,green light-emitting diode ,plasma-assisted molecular beam epitaxy ,Chemistry ,QD1-999 - Abstract
Self-assembled growth of blue-green-yellow-red InGaN quantum dots (QDs) on GaN templates using plasma-assisted molecular beam epitaxy were investigated. We concluded that growth conditions, including small N2 flow and high growth temperature are beneficial to the formation of InGaN QDs and improve the crystal quality. The lower In/Ga flux ratio and lower growth temperature are favorable for the formation of QDs of long emission wavelength. Moreover, the nitrogen modulation epitaxy method can extend the wavelength of QDs from green to red. As a result, visible light emissions from 460 nm to 622 nm have been achieved. Furthermore, a 505 nm green light-emitting diode (LED) based on InGaN/GaN MQDs was prepared. The LED has a low external quantum efficiency of 0.14% and shows an efficiency droop with increasing injection current. However, electroluminescence spectra exhibited a strong wavelength stability, with a negligible shift of less than 1.0 nm as injection current density increased from 8 A/cm2 to 160 A/cm2, owing to the screening of polarization-related electric field in QDs.
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- 2022
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24. Estimating Congestion in a Fixed-Route Bus by Using BLE Signals
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Yuji Kanamitsu, Eigo Taya, Koki Tachibana, Yugo Nakamura, Yuki Matsuda, Hirohiko Suwa, and Keiichi Yasumoto
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people counting ,crowd density ,BLE ,route bus ,machine learning ,Chemical technology ,TP1-1185 - Abstract
Information on congestion of buses, which are one of the major public transportation modes, can be very useful in light of the current COVID-19 pandemic. Because it is unrealistic to manually monitor the number of riders on all buses in operation, a system that can automatically monitor congestion is necessary. The main goal of this paper’s work is to automatically estimate the congestion level on a bus route with acceptable performance. For practical operation, it is necessary to design a system that does not infringe on the privacy of passengers and ensures the safety of passengers and the installation sites. In this paper, we propose a congestion estimation system that protects passengers’ privacy and reduces the installation cost by using Bluetooth low-energy (BLE) signals as sensing data. The proposed system consists of (1) a sensing mechanism that acquires BLE signals emitted from passengers’ mobile terminals in the bus and (2) a mechanism that estimates the degree of congestion in the bus from the data obtained by the sensing mechanism. To evaluate the effectiveness of the proposed system, we conducted a data collection experiment on an actual bus route in cooperation with Nara Kotsu Co., Ltd. The results showed that the proposed system could estimate the number of passengers with a mean absolute error of 2.49 passengers (error rate of 38.8%).
- Published
- 2022
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25. Demonstration of Blockchain Based Peer to Peer Energy Trading System with Real-Life Used PHEV and HEMS Charge Control
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Yuki Matsuda, Yuto Yamazaki, Hiromu Oki, Yasuhiro Takeda, Daishi Sagawa, and Kenji Tanaka
- Subjects
blockchain ,peer to peer energy market ,hardware control ,demonstration experiment ,home energy management systems ,electric vehicles ,Technology - Abstract
To further implement decentralized renewable energy resources, blockchain based peer-to-peer (P2P) energy trading is gaining attention and its architecture has been proposed with virtual demonstrations. In this paper, to further socially implement this concept, a blockchain based peer to peer energy trading system which could coordinate with energy control hardware was constructed, and a demonstration experiment was conducted. Previous work focused on virtually matching energy supply and demand via blockchain P2P energy markets, and our work pushes this forward by demonstrating the possibility of actual energy flow control. In this demonstration, Plug-in Hybrid Electrical Vehicles(PHEVs) and Home Energy Management Systems(HEMS) actually used in daily life were controlled in coordination with the blockchain system. In construction, the need of a multi-tagged continuous market was found and proposed. In the demonstration experiment, the proposed blockchain market and hardware control interface was proven capable of securing and stably transmitting energy within the P2P energy system. Also, by the implementation of multi-tagged energy markets, the number of transactions required to secure the required amount of electricity was reduced.
- Published
- 2021
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26. Investigation of Micromorphology and Carrier Recombination Dynamics for InGaN/GaN Multi-Quantum Dots Grown by Molecular Beam Epitaxy
- Author
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Xue Zhang, Wenxian Yang, Zhiwei Xing, Haibing Qiu, Ying Gu, Lifeng Bian, Shulong Lu, Hua Qin, Yong Cai, Yuta Suzuki, Sakuya Kaneko, Yuki Matsuda, Shinji Izumi, Yuichi Nakamura, and Atsushi Tackeuchi
- Subjects
InGaN quantum dots ,carrier recombination dynamics ,molecular beam epitaxy ,Crystallography ,QD901-999 - Abstract
InGaN quantum dots (QDs) are promising candidates for GaN-based all-visible optoelectronic devices such as micro light-emitting diode and laser. In this study, self-assembled InGaN/GaN multi-quantum dots (MQDs) have been grown by plasma-assisted molecular beam epitaxy on c-plane GaN-on-sapphire template. A high density of over 3.8 × 1010 cm−2 is achieved and InGaN QDs exhibit a relatively uniform size distribution and good dispersity. Strong localization effect in as-grown InGaN QDs has been evidenced by temperature-dependent photoluminescence (PL). The variation of peak energy is as small as 35 meV with increasing temperature from 10 K to 300 K, implying excellent temperature stability of emission wavelength for InGaN MQDs. Moreover, the radiative and nonradiative recombination times were calculated by time-resolved PL (TRPL) measurements, and the temperature dependence of PL decay times reveal that radiative recombination dominates the recombination process due to the low dislocation density of QDs structure.
- Published
- 2021
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27. DisCaaS: Micro Behavior Analysis on Discussion by Camera as a Sensor
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Ko Watanabe, Yusuke Soneda, Yuki Matsuda, Yugo Nakamura, Yutaka Arakawa, Andreas Dengel, and Shoya Ishimaru
- Subjects
digital camera ,camera as a smart sensor ,human action recognition ,meeting analysis ,3D pose estimation ,RGB sensors ,Chemical technology ,TP1-1185 - Abstract
The emergence of various types of commercial cameras (compact, high resolution, high angle of view, high speed, and high dynamic range, etc.) has contributed significantly to the understanding of human activities. By taking advantage of the characteristic of a high angle of view, this paper demonstrates a system that recognizes micro-behaviors and a small group discussion with a single 360 degree camera towards quantified meeting analysis. We propose a method that recognizes speaking and nodding, which have often been overlooked in existing research, from a video stream of face images and a random forest classifier. The proposed approach was evaluated on our three datasets. In order to create the first and the second datasets, we asked participants to meet physically: 16 sets of five minutes data from 21 unique participants and seven sets of 10 min meeting data from 12 unique participants. The experimental results showed that our approach could detect speaking and nodding with a macro average f1-score of 67.9% in a 10-fold random split cross-validation and a macro average f1-score of 62.5% in a leave-one-participant-out cross-validation. By considering the increased demand for an online meeting due to the COVID-19 pandemic, we also record faces on a screen that are captured by web cameras as the third dataset and discussed the potential and challenges of applying our ideas to virtual video conferences.
- Published
- 2021
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28. WaistonBelt X: A Belt-Type Wearable Device with Sensing and Intervention Toward Health Behavior Change
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Yugo Nakamura, Yuki Matsuda, Yutaka Arakawa, and Keiichi Yasumoto
- Subjects
wearable computing ,mobile sensing ,activity recognition ,health behavior change ,intervention ,health care support system ,Chemical technology ,TP1-1185 - Abstract
Changing behavior related to improper lifestyle habits has attracted attention as a solution to prevent lifestyle diseases, such as diabetes, heart disease, arteriosclerosis, and stroke. To drive health behavior changes, wearable devices are needed, and they must not only provide accurate sensing and visualization functions but also effective intervention functions. In this paper, we propose a health support system, WaistonBelt X, that consists of a belt-type wearable device with sensing and intervention functions and a smartphone application. WaistonBelt X can automatically measure a waistline with a magnetometer that detects the movements of a blade installed in the buckle, and monitor the basic activities of daily living with inertial sensors. Furthermore, WaistonBelt X intervenes with the user to correct lifestyle habits by using a built-in vibrator. Through evaluation experiments, we confirmed that our proposed device achieves measurement of the circumference on the belt position (mean absolute error of 0.93 cm) and basic activity recognition (F1 score of 0.95) with high accuracy. In addition, we confirmed that the intervention via belt vibration effectively improves the sitting posture of the user.
- Published
- 2019
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29. EmoTour: Estimating Emotion and Satisfaction of Users Based on Behavioral Cues and Audiovisual Data
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Yuki Matsuda, Dmitrii Fedotov, Yuta Takahashi, Yutaka Arakawa, Keiichi Yasumoto, and Wolfgang Minker
- Subjects
ubiquitous computing ,emotion recognition ,satisfaction estimation ,wearable computing ,dialogue systems ,smart tourism ,smart cities ,Chemical technology ,TP1-1185 - Abstract
With the spread of smart devices, people may obtain a variety of information on their surrounding environment thanks to sensing technologies. To design more context-aware systems, psychological user context (e.g., emotional status) is a substantial factor for providing useful information in an appropriate timing. As a typical use case that has a high demand for context awareness but is not tackled widely yet, we focus on the tourism domain. In this study, we aim to estimate the emotional status and satisfaction level of tourists during sightseeing by using unconscious and natural tourist actions. As tourist actions, behavioral cues (eye and head/body movement) and audiovisual data (facial/vocal expressions) were collected during sightseeing using an eye-gaze tracker, physical-activity sensors, and a smartphone. Then, we derived high-level features, e.g., head tilt and footsteps, from behavioral cues. We also used existing databases of emotionally rich interactions to train emotion-recognition models and apply them in a cross-corpus fashion to generate emotional-state prediction for the audiovisual data. Finally, the features from several modalities are fused to estimate the emotion of tourists during sightseeing. To evaluate our system, we conducted experiments with 22 tourists in two different touristic areas located in Germany and Japan. As a result, we confirmed the feasibility of estimating both the emotional status and satisfaction level of tourists. In addition, we found that effective features used for emotion and satisfaction estimation are different among tourists with different cultural backgrounds.
- Published
- 2018
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30. Cardiometabolic risks of blonanserin and perospirone in the management of schizophrenia: a systematic review and meta-analysis of randomized controlled trials.
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Taro Kishi, Yuki Matsuda, and Nakao Iwata
- Subjects
Medicine ,Science - Abstract
BACKGROUND: The present study aimed to evaluate cardiometabolic risks [weight gain, blood lipid levels (total cholesterol and triglycerides), blood glucose levels, hemoglobin A1c (HbA1c) levels, and corrected QT interval (QTc) prolongation] associated with the use of blonanserin and perospirone versus other antipsychotics in the management of patients with schizophrenia. METHOD: We conducted a systematic review and meta-analysis of patient data from randomized controlled trials comparing blonanserin or perospirone with other antipsychotics. RESULTS: In total, 4 blonanserin studies (n = 1080) were identified [vs. risperidone (2 studies, n = 508); vs. haloperidol (2 studies, n = 572)]. Blonanserin produced less weight gain compared with risperidone (weighted mean difference = -0.86, 95% confidence intervals = -1.36 to -0.36, p = 0.0008; 2 studies, 480 patients). However, no significant differences were observed in blood lipid, glucose, and HbA1c levels or QTc prolongation between blonanserin and risperidone or haloperidol. For perospirone studies, 5 studies [562 adult patients with schizophrenia randomized to perospirone (n = 256), olanzapine (n = 20), quetiapine (n = 28), risperidone (n = 53), aripiprazole (n = 49), haloperidol (n = 75), or mosapramine (n = 81)] were identified. Perospirone did not differ from other antipsychotics with regard to weight gain and total cholesterol levels. CONCLUSIONS: Our results suggest that blonanserin is associated with a lower of weight gain compared with other antipsychotics. Because the number of studies was small, additional controlled clinical trials with larger number of patients are indicated.
- Published
- 2014
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31. Soluble Polyimides Bearing Long-Chain Alkyl Groups on Their Side Chain via Polymer Reaction
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Yusuke Tsuda, Yuki Matsuda, and Takaaki Matsuda
- Subjects
Chemical technology ,TP1-1185 - Abstract
Novel soluble polyimides having long-chain alkyl groups on their side chain were synthesized via polymer reaction with the polyimides having phenolic OH groups and 3,4,5-tris(dodecyloxy)benzoic acid (12GA) using N,N′-dicyclohexylcarbodiimide (DCC) as a dehydration reagent. The polyimides having phenolic OH groups were synthesized from the tetracarboxylic dianhydrides such as 5-(2,5-dioxotetrahydrofuryl)-3-methyl-3-cyclohexene-1,2-dicarboxylic anhydride (cyclohexene-DA), 4,4′-hexafluoroisopropylidendi(phthalic anhydride) (6FDA), and 3,3′,4,4′-diphenylsulfone tetracarboxylic dianhydride (DSDA) and aromatic diamines such as 4,4′-diamino-3,3′-dihydroxybiphenyl (HAB). The polymer reactions were carried out in NMP and the progresses of polymer reactions were quantitatively monitored by 1H NMR measurements (conversion; 12.2–98.7%). The obtained polyimides bearing long-chain alkyl groups have enough molecular weights, good film-forming ability, good solubility for various organic solvents, and enough thermal stability. The water contact angles of the polyimide films were investigated, and it is noted that the introduction of long-chain alkyl groups increases the hydrophobicity of polyimide surface. These polyimides are expected to be applicable as the functional materials for microelectronics such as the alignment layers of LCDs.
- Published
- 2012
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32. Crystal structures of two polymorphs for fac-bromidotricarbonyl[4-(4-methoxyphenyl)-2-(pyridin-2-yl)thiazole-κ²N,N′]rhenium(I).
- Author
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Yuki Matsuda, Ryota Nakamura, Yoshiki Ozawa, and Masaaki Abe
- Abstract
Crystallization of the title compound, fac-[ReBr(ppt-OMe)(CO)
3 ] (ppt-OMe = C15 H12 N2 OS), from CH2 Cl2 /n-pentane (1:5 v/v) at room temperature gave two polymorphs, which crystallize in monoclinic (P21 /c; α form) and orthorhombic (Pna21 ; β form) space groups. The ReI complex molecules in either polymorph adopt a six-coordinate octahedral geometry with three facially-oriented carbonyl ligands, one bromido ligand, and two nitrogen atoms from one chelating ligand ppt-OMe. In the crystal, both polymorph α and β form di-periodic sheet-like architectures supported by multiple hydrogen bonds. In polymorph α, two types of hydrogen bonds (C—H⋯O) are found while, in polymorph β, four types of hydrogen bonds (C—H⋯O and C—H⋯Br) exist. [ABSTRACT FROM AUTHOR]- Published
- 2024
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33. Mobile Augmented Reality Interface for Instruction-based Disaster Preparedness Guidelines.
- Author
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De León Aguilar, Sergio, Yuki Matsuda, and Keiichi Yasumoto
- Subjects
EMERGENCY management ,COLLEGE curriculum ,INFORMATION science ,OBJECT recognition (Computer vision) ,TELECOMMUNICATION ,EARTHQUAKE resistant design ,AUGMENTED reality - Abstract
The article offers an examination of augmented reality (AR)-assisted disaster preparedness guidelines designed to improve public awareness and engagement. Topics include the use of AR to enhance disaster preparedness by incorporating object recognition for environmental hazard identification, a comparison of AR-based guidelines with traditional paper-based ones in terms of usability and task performance, and the findings from testing these interfaces across different age groups.
- Published
- 2024
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34. Development of Machine Learning-Based Web System for Estimating Pleural Effusion Using Multi-Frequency Bioelectrical Impedance Analyses
- Author
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Miura, Daisuke Nose, Tomokazu Matsui, Takuya Otsuka, Yuki Matsuda, Tadaaki Arimura, Keiichi Yasumoto, Masahiro Sugimoto, and Shin-Ichiro
- Subjects
heart failure ,impedance ,device ,estimation system ,machine learning - Abstract
Background: Transthoracic impedance values have not been widely used to measure extravascular pulmonary water content due to accuracy and complexity concerns. Our aim was to develop a foundational model for a novel system aiming to non-invasively estimate the intrathoracic condition of heart failure patients. Methods: We employed multi-frequency bioelectrical impedance analysis to simultaneously measure multiple frequencies, collecting electrical, physical, and hematological data from 63 hospitalized heart failure patients and 82 healthy volunteers. Measurements were taken upon admission and after treatment, and longitudinal analysis was conducted. Results: Using a light gradient boosting machine, and a decision tree-based machine learning method, we developed an intrathoracic estimation model based on electrical measurements and clinical findings. Out of the 286 features collected, the model utilized 16 features. Notably, the developed model demonstrated high accuracy in discriminating patients with pleural effusion, achieving an area under the receiver characteristic curves (AUC) of 0.905 (95% CI: 0.870–0.940, p < 0.0001) in the cross-validation test. The accuracy significantly outperformed the conventional frequency-based method with an AUC of 0.740 (95% CI: 0.688–0.792, and p < 0.0001). Conclusions: Our findings indicate the potential of machine learning and transthoracic impedance measurements for estimating pleural effusion. By incorporating noninvasive and easily obtainable clinical and laboratory findings, this approach offers an effective means of assessing intrathoracic conditions.
- Published
- 2023
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35. ParmoSense: Scenario-based Participatory Mobile Urban Sensing Platform with User Motivation Engine
- Author
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Yuki Matsuda, Shogo Kawanaka, Hirohiko Suwa, Yutaka Arakawa, and Keiichi Yasumoto
- Subjects
Social and Information Networks (cs.SI) ,FOS: Computer and information sciences ,H.4 ,mobile computing ,urban sensing ,Computer Science - Human-Computer Interaction ,68M18 ,ubiquitous computing ,Computer Science - Social and Information Networks ,Human-Computer Interaction (cs.HC) ,participatory sensing ,smart city ,incentive mechanism ,gamification ,General Materials Science ,civic computing ,Instrumentation - Abstract
Rapid proliferation of mobile devices with various sensors have enabled Participatory Mobile Sensing (PMS). Several PMS platforms provide multiple functions for various sensing purposes, but they are suffering from the open issues: limited use of their functions for a specific scenario/case and requiring technical knowledge for organizers. In this paper, we propose a novel PMS platform named ParmoSense for easily and flexibly collecting urban environmental information. To reduce the burden on both organizers and participants, in ParmoSense, we employ two novel features: modularization of functions and scenario-based PMS system description. For modularization, we provide the essential PMS functions as modules which can be easily chosen and combined for sensing in different scenarios. The scenario-based description feature allows organizers to easily and quickly set up a new participatory sensing instance and participants to easily install the corresponding scenario and participate in the sensing. Moreover, ParmoSense provides GUI tools as well for creating and distributing PMS system easily, editing and visualizing collected data quickly. It also provides multiple functions for encouraging participants' motivation for sustainable operation of the system. Through performance comparison with existing PMS platforms, we confirmed ParmoSense shows the best cost-performance in the perspective of the workload for preparing PMS system and varieties of functions. In addition, to evaluate the availability and usability of ParmoSense, we conducted 19 case studies, which have different locations, scales, and purposes, over 4 years with cooperation from ordinary citizens. Through the case studies and the questionnaire survey for participants and organizers, we confirmed that ParmoSense can be easily operated and participated by ordinary citizens including non-technical persons., 24 pages, 9 figures
- Published
- 2022
36. Inertial Measurement Unit-sensor-based Short Stick Exercise Tracking to Improve Health of Elderly People
- Author
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Kazuki Oi, Yugo Nakamura, Yuki Matsuda, Manato Fujimoto, and Keiichi Yasumoto
- Subjects
machine learning ,short stick exercise ,General Materials Science ,IMU ,Instrumentation - Abstract
Short stick exercises have been attracting attention from the viewpoint of preventing falls and improving the health of elderly people and are generally performed under the guidance of instructors and nursing staff at nursing homes. However, in situations such as the COVID-19 pandemic, where people should refrain from unnecessary outings, it is advisable that individuals perform short stick exercises at home and record their exercise implementation status. In this paper, we propose an inertial measurement unit (IMU)-sensor-based short stick exercise tracking method that can automatically record the types and amounts of exercises performed using a short stick equipped with an IMU sensor. The proposed method extracts time-domain and frequency-domain features from linear acceleration and quaternion time-series data obtained from the IMU sensor and classifies the type of exercise using an inference model based on machine learning algorithms. To evaluate the proposed method, we collected sensor data from 21 young subjects (in their 20s) and 14 elderly subjects (79–95 years old), where the participants performed three sets (10 times per set) of eight basic types of short stick exercises (five types for elderly people). As a result of evaluating the proposed method using this data set, we confirmed that when LightGBM was used as the learning algorithm, it achieved F values of 90.0 and 86.6% for recognizing the type of exercise for young and elderly people, respectively.
- Published
- 2022
37. ACOGARE: Acoustic-Based Litter Garbage Recognition Utilizing Smartwatch
- Author
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Yasumoto, Koki Tachibana, Yugo Nakamura, Yuki Matsuda, Hirohiko Suwa, and Keiichi
- Subjects
machine learning ,activity recognition ,object detection ,acoustic signal processing - Abstract
Litter has become a social problem. To prevent litter, we consider urban planning, the efficient placement of garbage bins, and interventions with litterers. In order to carry out these actions, we need to comprehensively grasp the types and locations of litter in advance. However, with the existing methods, collecting the types and locations of litter is very costly and has low privacy. In this research, we have proposed the conceptual design to estimate the types and locations of litter using only the sensor data from a smartwatch worn by the user. This system can record the types and locations of litter only when a user raps on the litter and picks it up. Also, we have constructed a sound recognition model to estimate the types of litter by using sound sensor data, and we have carried out experiments. We have confirmed that the model built with other people’s data enabled to estimate the F-measure of 80.2% in a noisy environment through the experiment with 12 participants.
- Published
- 2023
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38. Towards Cheaper Tourists' Emotion and Satisfaction Estimation with PCA and Subgroup Analysis
- Author
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Lucas Maris, Yuki Matsuda, Sadre, Ramin, Keiichi Yasumoto, and UCL - SST/ICTM/INGI - Pôle en ingénierie informatique
- Abstract
Smart tourism leverages ubiquitous sensors to recognise the state of tourists and provide them with a better-tailored sightseeing experience. We previously reported on our EmoTour system [1], which uses behavioural cues and audiovisual data collected during sightseeing to estimate tourists' emotional status and satisfaction levels. Some of this data is however not exceedingly convenient to collect, as eye-gaze trackers for instance are not widely available nor usually worn by regular tourists. In this paper, we explore different possibilities to both improve our previous results and lessen the cost of data collection, to work towards a system that is better suited for real-world applications. Using Principal Component Analysis dimensionality reduction, we show how leaving out either or both of eye-gaze tracker and physiological wristband sensor data can have little to no impact on the quality of predictions, and improve on our previously reported classification and regression scores. We also apply this new method to explore differences in emotional responses according to participants' nationality, age, and gender.
- Published
- 2023
39. Exploring the Impacts of Elaborateness and Indirectness in a Behavior Change Support System
- Author
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Yuki Matsuda, Yutaka Arakawa, Manato Fujimoto, Juliana Miehle, Zhihua Zhang, Keiichi Yasumoto, and Wolfgang Minker
- Subjects
communication styles ,020205 medical informatics ,General Computer Science ,Data needs ,Interpretation (philosophy) ,Behavior change ,General Engineering ,physical activity ,02 engineering and technology ,External Data Representation ,Data science ,TK1-9971 ,Quantitative analysis (finance) ,Communication styles ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,General Materials Science ,Support system ,Electrical engineering. Electronics. Nuclear engineering ,Psychology ,Meaning (linguistics) - Abstract
Numerous technologies exist for promoting a healthier lifestyle. These technologies collectively referred to as “Behavior Change Support Systems”. However, the majority of existing apps use quantitative data representation. Since it is difficult to understand the meaning behind quantitative data, this approach has been suggested to lower users’ motivation and fail to promote behavior change. Therefore, an interpretation of quantitative data needs to be provided as a supplement. However, different descriptions of the same data may lead to different outcomes. In this paper, we explore the impact of different communication styles for interpretations of quantitative data on behavior change by developing and evaluating Walkeeper – a web-based app that provides interpretations of the users’ daily step counts using different levels of elaborateness and indirectness with the aim of promoting walking. Through the quantitative analysis and results of a user study, we contribute new knowledge on designing such interpretations for quantitative data.
- Published
- 2021
40. Detection of Careless Responses in Online Surveys Using Answering Behavior on Smartphone
- Author
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Yutaka Arakawa, Keiichi Yasumoto, Masaki Gogami, and Yuki Matsuda
- Subjects
General Computer Science ,Computer science ,050109 social psychology ,Computer-assisted web interviewing ,Machine learning ,computer.software_genre ,smartphone ,050105 experimental psychology ,Data modeling ,Likert scale ,law.invention ,Touchscreen ,online questionnaire ,law ,0501 psychology and cognitive sciences ,General Materials Science ,supervised machine learning ,Electrical and Electronic Engineering ,Answering behavior ,satisficing ,Reliability (statistics) ,business.industry ,Deep learning ,05 social sciences ,General Engineering ,Scrolling ,Satisficing ,careless response ,touchscreen ,Artificial intelligence ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,business ,computer ,lcsh:TK1-9971 - Abstract
Some respondents make careless responses due to the “satisficing,” which is an attempt to complete a questionnaire as quickly and easily as possible. To obtain results that reflect a fact, detecting satisficing and excluding the responses with satisficing from the analysis targets are required. One of the devised methods detects satisficing by adding questions that check violations of instructions and inconsistencies. However, this approach may cause respondents to lose their motivation and prompt them to satisficing. Additionally, a deep learning model that automatically answers these questions was reported. This threatens the reliability of the conventional method. To detect careless responses without inserting such screening questions, machine learning (ML) detection using data obtained from answer results was attempted in a previous study, with a detection rate of 55.6%, which is not sufficient from the viewpoint of practicality. Therefore, we hypothesized that a supervised ML model with a higher detection rate could be constructed by using on-screen answering behavior as features. However, (1) no existing questionnaire system can record on-screen answering behavior and (2) even if the answering behavior can be recorded, it is unclear which answering behavior features are associated with satisficing. We developed an answering behavior recording plug-in for LimeSurvey, an online questionnaire system used all over the world, and collected a large amount of data (from 5,692 people) in Japan. Then, a variety of features were examined and generated from answering behavior, and we constructed ML models to detect careless responses. We call this detection method the ML-ABS (ML-based answering behavior scale). Evaluation by cross-validation demonstrated that the detection rate for careless responses was 85.9%, which is much higher than the previous ML method. Among the various features we proposed, we found that reselecting the Likert scale and scrolling particularly contributed to the detection of careless responses.
- Published
- 2021
41. Mood stabilizers and/or antipsychotics for bipolar disorder in the maintenance phase: a systematic review and network meta-analysis of randomized controlled trials
- Author
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Kenji Sakuma, Yuki Matsuda, Kazuo Mishima, Toshikazu Ikuta, Taro Kishi, Makoto Okuya, and Nakao Iwata
- Subjects
Olanzapine ,Adult ,medicine.medical_specialty ,Bipolar Disorder ,Network Meta-Analysis ,Lamotrigine ,Gastroenterology ,Article ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Antimanic Agents ,Internal medicine ,medicine ,Asenapine ,Humans ,Ziprasidone ,Molecular Biology ,Lurasidone ,Randomized Controlled Trials as Topic ,Risperidone ,business.industry ,Drug discovery ,030227 psychiatry ,Psychiatry and Mental health ,Quetiapine ,Aripiprazole ,Female ,business ,030217 neurology & neurosurgery ,medicine.drug ,Antipsychotic Agents - Abstract
We searched Embase, PubMed, and CENTRAL from inception until 22 May 2020 to investigate which antipsychotics and/or mood stabilizers are better for patients with bipolar disorder in the maintenance phase. We performed two categorical network meta-analyses. The first included monotherapy studies and studies in which the two drugs used were specified (i.e., aripiprazole, aripiprazole once monthly, aripiprazole+lamotrigine, aripiprazole+valproate, asenapine, carbamazepine, lamotrigine, lamotrigine+valproate, lithium, lithium+oxcarbazepine, lithium+valproate, olanzapine, paliperidone, quetiapine, risperidone long-acting injection, valproate, and placebo). The second included studies on second-generation antipsychotic combination therapies (SGAs) (i.e., aripiprazole, lurasidone, olanzapine, quetiapine, and ziprasidone) with lithium or valproate (LIT/VAL) compared with placebo with LIT/VAL. Outcomes were recurrence/relapse rate of any mood episode (RR-any, primary), depressive episode (RR-dep) and manic/hypomanic/mixed episode (RR-mania), discontinuation, mortality, and individual adverse events. Risk ratios and 95% credible interval were calculated. Forty-one randomized controlled trials were identified (n = 9821; mean study duration, 70.5 ± 36.6 weeks; percent female, 54.1%; mean age, 40.7 years). All active treatments other than carbamazepine, lamotrigine+valproate (no data) and paliperidone outperformed the placebo for RR-any. Aripiprazole+valproate, lamotrigine, lamotrigine+valproate, lithium, olanzapine, and quetiapine outperformed placebo for RR-dep. All active treatments, other than aripiprazole+valproate, carbamazepine, lamotrigine, and lamotrigine+valproate, outperformed placebo for RR-mania. Asenapine, lithium, olanzapine, quetiapine, and valproate outperformed placebo for all-cause discontinuation. All SGAs+LIT/VALs other than olanzapine+LIT/VAL outperformed placebo+LIT/VAL for RR-any. Lurasidone+LIT/VAL and quetiapine+LIT/VAL outperformed placebo+LIT/VAL for RR-dep. Aripiprazole+LIT/VAL and quetiapine+LIT/VAL outperformed placebo+LIT/VAL for RR-mania. Lurasidone+LIT/VAL and quetiapine+LIT/VAL outperformed placebo+LIT/VAL for all-cause discontinuation. Treatment efficacy, tolerability, and safety profiles differed among treatments.
- Published
- 2020
42. Cu-Catalyzed three-component coupling reactions using nitriles, 1,3-dienes and silylboranes
- Author
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Tetsuaki Fujihara, Yuki Matsuda, and Yasushi Tsuji
- Subjects
Component (thermodynamics) ,Chemistry ,Metals and Alloys ,Regioselectivity ,General Chemistry ,Medicinal chemistry ,Catalysis ,Coupling reaction ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Yield (chemistry) ,Materials Chemistry ,Ceramics and Composites ,Moiety - Abstract
This paper reports novel Cu-catalyzed three-component coupling reactions using nitriles, 1, 3-dienes and silylboranes. The desired reactions proceed at room temperature and yield β, γ-unsaturated ketones with a (dimethylphenylsilyl)methyl moiety at the α-position. Diverse nitriles participate in the reaction and the corresponding products were obtained in good to high yields with high regioselectivity.
- Published
- 2020
43. Demonstration of Blockchain Based Peer to Peer Energy Trading System with Real-Life Used PHEV and HEMS Charge Control
- Author
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Kenji Tanaka, Daishi Sagawa, Yasuhiro Takeda, Hiromu Oki, Yuto Yamazaki, and Yuki Matsuda
- Subjects
blockchain ,Technology ,Control and Optimization ,Blockchain ,Energy management ,Computer science ,Distributed computing ,Interface (computing) ,Control (management) ,Energy Engineering and Power Technology ,Peer-to-peer ,computer.software_genre ,peer to peer energy market ,hardware control ,home energy management systems ,Electrical and Electronic Engineering ,Engineering (miscellaneous) ,electric vehicles ,demonstration experiment ,Renewable Energy, Sustainability and the Environment ,business.industry ,Renewable energy ,Electricity ,business ,computer ,Energy (signal processing) ,Energy (miscellaneous) - Abstract
To further implement decentralized renewable energy resources, blockchain based peer-to-peer (P2P) energy trading is gaining attention and its architecture has been proposed with virtual demonstrations. In this paper, to further socially implement this concept, a blockchain based peer to peer energy trading system which could coordinate with energy control hardware was constructed, and a demonstration experiment was conducted. Previous work focused on virtually matching energy supply and demand via blockchain P2P energy markets, and our work pushes this forward by demonstrating the possibility of actual energy flow control. In this demonstration, Plug-in Hybrid Electrical Vehicles(PHEVs) and Home Energy Management Systems(HEMS) actually used in daily life were controlled in coordination with the blockchain system. In construction, the need of a multi-tagged continuous market was found and proposed. In the demonstration experiment, the proposed blockchain market and hardware control interface was proven capable of securing and stably transmitting energy within the P2P energy system. Also, by the implementation of multi-tagged energy markets, the number of transactions required to secure the required amount of electricity was reduced.
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- 2021
44. Quetiapine extended‐release vs olanzapine for Japanese patients with bipolar depression: A Bayesian analysis
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Nakao Iwata, Taro Kishi, Toshikazu Ikuta, and Yuki Matsuda
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Olanzapine ,Adult ,Male ,medicine.medical_specialty ,Bipolar Disorder ,Adolescent ,olanzapine ,Bayesian analysis ,Micro Reports ,Weight Gain ,Micro Report ,Quetiapine Fumarate ,Japan ,Internal medicine ,medicine ,Humans ,Pharmacology (medical) ,quetiapine extended‐release ,Adverse effect ,Depression (differential diagnoses) ,Pharmacology ,Metabolic Syndrome ,bipolar depression ,business.industry ,Cholesterol, HDL ,Bayes Theorem ,Middle Aged ,Discontinuation ,Prolactin ,Psychiatry and Mental health ,Clinical Psychology ,Strictly standardized mean difference ,Relative risk ,Delayed-Action Preparations ,Japanese ,Quetiapine ,Female ,medicine.symptom ,business ,Somnolence ,medicine.drug ,Antipsychotic Agents - Abstract
Objective It is unknown whether there are differences in efficacy and safety between quetiapine extended‐release, 300 mg/d (QUEXR300), and olanzapine, 5‐20 mg/d (OLA), for Japanese patients with bipolar depression. Methods We conducted a Bayesian analysis of data from phase 3 studies in Japan of QUEXR300 and OLA. Outcomes were remission rate (primary), response rate, improvement on the Montgomery‐Åsberg Depression Rating Scale and 17‐item Hamilton Depression Rating Scale scores, discontinuation rate, and incidence of individual adverse events. We calculated the standardized mean difference (SMD) and the risk ratio (RR) and 95% credible interval (95% CrI) for continuous and dichotomous data, respectively. Results There were no significant differences between QUEXR300 and OLA for any of the efficacy outcomes. QUEXR300 was associated with a higher incidence of somnolence than OLA (RR = 5.517; 95% CrI = 1.563, 19.787), while OLA was associated with greater increase body weight (SMD = −0.488; 95% CrI = −0.881, −0.089) and blood prolactin levels (SMD = −0.642; 95% CrI = −1.073, −0.213) than QUEXR300, and a greater decrease in high‐density lipoprotein cholesterol levels (SMD = −0.408; 95% CrI = −0.785, −0.030) than QUEXR300. Conclusion Although the two drugs’ efficacy did not differ, OLA increased the risk of metabolic syndrome and QUEXR300 the risk of somnolence. A large scale, long‐term, head‐to‐head comparison study of QUEXR300 vs OLA for Japanese patients with bipolar depression is needed to confirm the results of the current study., We conducted a Bayesian analysis of data from phase 3 studies in Japan of quetiapine extended‐release, 300 mg/d (QUEXR300), and olanzapine, 5‐20 mg/day (OLA). Although the two drugs’ efficacy did not differ, OLA increased the risk of metabolic syndrome and QUEXR300 the risk of somnolence.
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- 2019
45. Evacuation Shelter Decision Method Considering Non-Cooperative Evacuee Behavior to Support the Disaster Weak
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Tomoki Tanaka, Keiichi Yasumoto, Hirohiko Suwa, Manato Fujimoto, and Yuki Matsuda
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Evacuation Shelter ,Operations research ,Computer science ,Geography, Planning and Development ,TJ807-830 ,02 engineering and technology ,Management, Monitoring, Policy and Law ,TD194-195 ,Renewable energy sources ,multi-agent simulation ,disaster weak ,0202 electrical engineering, electronic engineering, information engineering ,Limited capacity ,shelter decision method ,GE1-350 ,Environmental effects of industries and plants ,Renewable Energy, Sustainability and the Environment ,Combinatorial optimization problem ,020206 networking & telecommunications ,Decision methods ,Environmental sciences ,combinatorial optimization problem ,020201 artificial intelligence & image processing ,evacuation strategies ,Selection method ,Decision model - Abstract
In disaster situations, special support for the disaster weak are crucial to keep them safe. Common evacuation strategies guide individuals to the shelters closest to their present locations. If evacuees are unevenly distributed across areas, some shelters will not be able to accommodate all arriving evacuees due to the limited capacity of shelters. To tackle this, the existing method decides the destinations for each evacuee considering congestion in disaster areas. However, this method does not consider the disaster weak and can be burdensome for them. Giving that the priority to the disaster weak for shelter decision would be effective to lessen burdens for them, but not all evacuees follow the guidance. When a shelter accepts arriving evacuees unconditionally, some evacuees are rejected, causing a delay in evacuation. If the disaster weak are rejected, the delay will be increased. In this paper, we propose two evacuation shelter decision methods considering the capacity of shelters, the disaster weak, and evacuees’ selfish behavior to realize quick evacuation for the disaster weak: (1) Fixed-rate Reduction Method (FRM), which reduces the assignment number of evacuees less than the capacity at the same percentage to all shelters. (2) Simulation-based Reduction Method (SRM), which reduces the assignment number to shelters that will be crowded based on simulation of an evacuation scenario. Then, these methods decide the destinations for evacuees, with the priority given to the disaster weak. To evaluate the efficiency of the proposed methods, we conducted multi-agent simulation assuming the scenario of evacuation of 30,000 visitors for the Gion Festival including the disaster weak. Through the simulation, we compared our methods with conventional methods including the nearest shelter selection method and the exiting method. As a result, our methods can reduce evacuation time of the disaster weak compared to conventional methods with sufficient cooperation by evacuees.
- Published
- 2021
46. Timeliness-Aware On-Site Planning Method for Tour Navigation
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Shogo Isoda, Hirohiko Suwa, Masato Hidaka, Yuki Matsuda, and Keiichi Yasumoto
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Social and Information Networks (cs.SI) ,FOS: Computer and information sciences ,Focus (computing) ,Operations research ,Point of interest ,tourism recommendation ,Computer science ,05 social sciences ,Site planning ,Aggregate (data warehouse) ,Computer Science - Social and Information Networks ,02 engineering and technology ,decision making ,020204 information systems ,context awareness ,Computer Science - Data Structures and Algorithms ,0502 economics and business ,on-site planning ,0202 electrical engineering, electronic engineering, information engineering ,Context awareness ,Data Structures and Algorithms (cs.DS) ,Set (psychology) ,Greedy algorithm ,050212 sport, leisure & tourism ,Tourism - Abstract
In recent years, there has been a growing interest in travel applications that provide on-site personalized tourist spot recommendations. While generally helpful, most available options offer choices based solely on static information on places of interest without consideration of such dynamic factors as weather, time of day, and congestion, and with a focus on helping the tourist decide what single spot to visit next. Such limitations may prevent visitors from optimizing the use of their limited resources (i.e., time and money). Some existing studies allow users to calculate a semi-optimal tour visiting multiple spots in advance, but their on-site use is difficult due to the large computation time, no consideration of dynamic factors, etc. To deal with this situation, we formulate a tour score approach with three components: static tourist information on the next spot to visit, dynamic tourist information on the next spot to visit, and an aggregate measure of satisfaction associated with visiting the next spot and the set of subsequent spots to be visited. Determining the tour route that produces the best overall tour score is an NP-hard problem for which we propose three algorithms variations based on the greedy method. To validate the usefulness of the proposed approach, we applied the three algorithms to 20 points of interest in Higashiyama, Kyoto, Japan, and confirmed that the output solution was superior to the model route for Kyoto, with computation times of the three algorithms of 1.9±, 0.1, 2.0±, 0.1, and 27.0±, 1.8 s.
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- 2020
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47. Early Repolarization Pattern is Associated with Schizophrenia: A Single Center Experience in Japan
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Kenichi Sugimoto, Keisuke Inamura, Fumitoshi Kodaka, Hiroshi Kameyama, Kyoko Itoh, Kazutaka Nukariya, Yuki Matsuda, Masahiro Shigeta, and Tomohiro Kato
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Abnormal electrocardiograms ,medicine.medical_specialty ,Benign early repolarization ,Hospitalized patients ,Early Repolarization Pattern ,business.industry ,Matched control ,Single Center ,medicine.disease ,Schizophrenia ,Internal medicine ,Cardiology ,Medicine ,In patient ,business - Abstract
IntroductionRecent studies have shown a high frequency of abnormal electrocardiograms in patients with schizophrenia. The objective of this study was to associate schizophrenia diagnoses with early repolarization patterns in a sample of hospitalized patients from a single hospital in Japan.MethodsWe conducted a retrospective age, sex and coronary risk factors matched case-control study on 85 patients with schizophrenia and 89 controls from medical checkups. First, we compared the presence of early repolarization patterns in both groups. Secondly, we elucidated an association between the presence of an early repolarization pattern and clinical findings in the patients’ groups. We also evaluated J-point elevation patterns.ResultsAs a result, we found that both early repolarization patterns and J-point elevation patterns observed were significantly higher in the schizophrenic group than in the matched control group (early repolarization pattern 23;6 P < 0.001; J-point elevation pattern 34:12; P = 0.001). After multivariable logistic regression among the patients and controls, schizophrenia was the independent predictor for early repolarization pattern (P = 0.001) and J-point elevation (P < 0.001). Among the patients, the independent predictor for early repolarization pattern was psychiatric family history (P = 0.006), while older age (P = 0.038) and psychiatric family history (P = 0.014) were predictors for J-point elevation patterns.ConclusionThese findings suggest that an association between early repolarization pattern or J-point elevation pattern and schizophrenia in a single Japanese center.
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- 2020
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48. Gamified Participatory Sensing in Tourism: An Experimental Study of the Effects on Tourist Behavior and Satisfaction
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Yutaka Arakawa, Manato Fujimoto, Hirohiko Suwa, Shogo Kawanaka, Keiichi Yasumoto, and Yuki Matsuda
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behavior change ,Participatory sensing ,Knowledge management ,business.industry ,Computer science ,Behavior change ,Information technology ,020206 networking & telecommunications ,02 engineering and technology ,Task (project management) ,Variable (computer science) ,Game design ,Incentive ,participatory sensing ,020204 information systems ,0202 electrical engineering, electronic engineering, information engineering ,tourism ,incentive mechanism ,gamification ,business ,Tourism - Abstract
In the tourism sector, user-generated information and communication among tourists are perceived to be more effective and reliable contents. In addition, the collection of dynamic tourism information with high spatio-temporal resolution is required to provide comfortable tourism in response to the changing tourism style with the advancement of information technology. Participatory sensing, which can collect various types of information is a useful method by which to collect these contents. However, continuous participation of users is essential in participatory sensing, and it is one of the most important points to stimulate participation motivation. In the tourism situation, we also need to pay attention to the total tourist satisfaction of participants. In this paper, we adopt gamification, i.e., the implementation of game design elements in real-world contexts for non-gaming purposes, for participatory sensing as an incentive mechanism to motivate participants with active participation and collect the necessary information efficiently. Within the framework, where points are given when completing the requested sensing task (=mission), two sensing missions with different burdens, Area Mission and Check-in Mission, and three different types of rewarding mechanisms, Fixed, Variable and Dynamic Variable, are designed as a gamification mechanism. We implemented these elements in the proposed participatory sensing platform application and conducted an experimental case study with 33 participants at an actual tourist spot: Kyoto, Japan. Then, we investigate the effects on tourist behavior and satisfaction by analyzing collected sensor data, mission logs, and post-survey answers. As a result, we can conclude the following: (1) the tourist behavior is changed due to the proposed gamification design and the necessary information was collected efficiently, (2) the participants tend to prioritize Check-in Mission over the sightseeing, which can induce a behavior change but might impact sightseeing enjoyment.
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- 2020
49. On-site Trip Planning Support System Based on Dynamic Information on Tourism Spots
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Masato Hidaka, Keiichi Yasumoto, Shogo Kawanaka, Yugo Nakamura, Yuki Matsuda, Yuki Kanaya, Manato Fujimoto, Hirohiko Suwa, and Yutaka Arakawa
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Computer science ,05 social sciences ,020206 networking & telecommunications ,02 engineering and technology ,Environmental economics ,trip planning ,Preference ,on-site tourism recommendation ,Satisfaction level ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,Key (cryptography) ,acquisition of preference information ,Support system ,dynamic information ,050212 sport, leisure & tourism ,Trip planning ,Tourism - Abstract
Recently, due to the drastic increase in foreign tourists coming to Japan, there has been a demand to provide smart tourism services that enable inbound tourists to comfortably enjoy sightseeing. To provide satisfactory experiences for tourists, it is desirable to provide tourist information in a timely manner by considering dynamic information, which is information that changes over time, such as current congestion information in destination spots and travel route information, in addition to static information, such as the preferences and profiles of tourists. However, in many existing systems, serious problems occur, such as (1) a lack of support for on-site use, (2) a lack of consideration of dynamic information, and (3) heavy burden on tourists. In this paper, we propose a novel system that can provide tourism plans for tourism spots in a timely manner. The proposed system consists of the following two key mechanisms: (A) A mechanism for acquiring preference information from tourists (including preference on dynamic information); (B) a curation mechanism for realizing on-site tourism. To demonstrate the effectiveness of the proposed system, we carried out evaluation experiments utilizing real tourism spots and simulations. As a result, we obtained the following primary findings: (1) On-site tourism spot recommendation is effective for tourists who do not make detailed tourism plans before sightseeing; (2) preference information for participants can be reflected in the tourism spot recommendation while massively reducing the burden on participants; (3) it is possible to obtain a higher satisfaction level than is achieved with model courses, which are often used for sightseeing.
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- 2020
50. Anti-Dementia Drugs for Psychopathology and Cognitive Impairment in Schizophrenia: A Systematic Review and Meta-Analysis
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Taro Kishi, Kazuto Oya, Toshikazu Ikuta, Shinji Matsunaga, Yuki Matsuda, and Nakao Iwata
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medicine.medical_specialty ,Review ,Verbal learning ,03 medical and health sciences ,0302 clinical medicine ,Cognition ,systematic review ,Internal medicine ,Brief Psychiatric Rating Scale ,Medicine ,Humans ,Pharmacology (medical) ,Cognitive Dysfunction ,Nootropic Agents ,cognitive impairment ,Randomized Controlled Trials as Topic ,Pharmacology ,Mini–Mental State Examination ,medicine.diagnostic_test ,Positive and Negative Syndrome Scale ,business.industry ,anti-dementia drugs ,psychopathology ,030227 psychiatry ,Discontinuation ,schizophrenia ,meta-analysis ,Psychiatry and Mental health ,Treatment Outcome ,Strictly standardized mean difference ,Meta-analysis ,Schizophrenic Psychology ,business ,030217 neurology & neurosurgery ,Psychopathology - Abstract
Background We conducted a systematic review and meta-analysis of double-blind, randomized, placebo-controlled trials of anti-dementia drugs plus antipsychotics for schizophrenia. Methods Primary outcomes of efficacy and safety included improving overall symptoms (Positive and Negative Syndrome Scale and Brief Psychiatric Rating Scale scores) and all-cause discontinuation, respectively. Other outcomes included psychopathology subscales (positive, negative, general, and anxiety/depressive symptoms), cognitive function (attention/vigilance, reasoning/problem solving, social cognition, speed of processing, verbal learning, visual learning, working memory, and cognitive control/executive function), Mini-Mental State Examination scores, treatment discontinuation due to adverse events and inefficacy, and individual adverse events. We evaluated the effect size using a random effects model. Results We identified 37 studies (n=1574): 14 donepezil-based (n=568), 10 galantamine-based (n=371), 4 rivastigmine-based (n=146), and 9 memantine-based (n=489) studies. Pooled anti-dementia drugs plus antipsychotics treatments were superior to placebo plus antipsychotics in improving the overall symptoms (24 studies, 1069 patients: standardized mean difference=−0.34, 95% CI=−0.61 to −0.08, P=.01), negative symptoms (24 studies, 1077 patients: standardized mean difference =−0.62, 95% CI=−0.92 to −0.32, Pcorrected=.00018), and Mini-Mental State Examination scores (7 studies, 225 patients: standardized mean difference=−0.79, 95% CI=−1.23 to −0.34, P=.0006). No significant differences were found between anti-dementia drugs plus antipsychotics and placebo plus antipsychotics regarding other outcomes. Conclusions Although the results suggest that anti-dementia drugs plus antipsychotics treatment improves negative symptoms and Mini-Mental State Examination scores in schizophrenia patients, they possibly were influenced by a small-study effect and some bias. However, it was not superior to placebo plus antipsychotics in improving composite cognitive test score, which more systematically evaluates cognitive impairment than the Mini-Mental State Examination score. Overall, the anti-dementia drugs plus antipsychotics treatment was well tolerated.
- Published
- 2018
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