Shōhei Kato
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View article: An Enhanced Multi-Stage Evolution Strategy for Large Size Magic Square Generationand Extension to Magic Rectangles
An Enhanced Multi-Stage Evolution Strategy for Large Size Magic Square Generationand Extension to Magic Rectangles Open
This research presents an enhanced multi-stage evolutionary strategy for the rapid and stable generation of large-scale magic squares and rectangles. Although previous methods have demonstrated improved performance, significant challenges …
View article: Performance-weighted ensemble learning for detecting patients with FTD and ALS from brief reading speech
Performance-weighted ensemble learning for detecting patients with FTD and ALS from brief reading speech Open
We developed a novel machine learning model named performance-weighted ensemble learning (PWEL) to detect frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS) using speech from word and sentence reading tasks. Overall, 197…
View article: Improving Scalability of Multi-Agent Deep Reinforcement Learning with Suboptimal Human Knowledge
Improving Scalability of Multi-Agent Deep Reinforcement Learning with Suboptimal Human Knowledge Open
Due to its exceptional learning ability, multi-agent deep reinforcement learning (MADRL) has garnered widespread research interest. However, since the learning is data-driven and involves sampling from millions of steps, training a large n…
View article: A Method for Continuous Health Survey in an Elderly Community and the Relationship Between Social Capital and Health Data Collection
A Method for Continuous Health Survey in an Elderly Community and the Relationship Between Social Capital and Health Data Collection Open
View article: Predicting Voting Outcomes for Multi-Alternative Elections in Social Networks
Predicting Voting Outcomes for Multi-Alternative Elections in Social Networks Open
In multi-alternative elections, messages in support of or against alternatives spread across online social media. To make decisions, individuals integrate various sources of information, including information from their friends in online s…
View article: Performance evaluation of brain state discrimination using near-infrared spectroscopy for brain-computer interface: an exploratory case study
Performance evaluation of brain state discrimination using near-infrared spectroscopy for brain-computer interface: an exploratory case study Open
A new method of environmental control that does not depend on motor functions is eagerly awaited to support independent living for people with severe quadriplegia. In this study, we conducted an exploratory case study of brain state discr…
View article: Scaling Up Multi-Agent Reinforcement Learning: An Extensive Survey on Scalability Issues
Scaling Up Multi-Agent Reinforcement Learning: An Extensive Survey on Scalability Issues Open
Multi-agent learning has made significant strides in recent years. Benefiting from deep learning, multi-agent deep reinforcement learning (MADRL) has transcended traditional limitations seen in tabular tasks, arousing tremendous research i…
View article: Generating Products Placement in Warehouse Using BLPSO and MIQCPs
Generating Products Placement in Warehouse Using BLPSO and MIQCPs Open
View article: Modular Robotization of Crawler Robots to Reduce Risk of Failure
Modular Robotization of Crawler Robots to Reduce Risk of Failure Open
View article: Malposition of a pulmonary artery catheter in the left ventricle: a case report
Malposition of a pulmonary artery catheter in the left ventricle: a case report Open
Background Placement of pulmonary artery catheters may be associated with a variety of complications. We present a case where a pulmonary artery catheter was accidentally advanced into the left ventricle by perforating the intraventricular…
View article: Influence Propagation Based Influencer Detection in Online Forum
Influence Propagation Based Influencer Detection in Online Forum Open
Influential user detection is critical in supporting the human facilitator-based facilitation in the online forum. Traditional approaches to detect influential users in the online forum focus on the statistical activity information such as…
View article: Partner Selection Strategy in Open, Dynamic and Sociable Environments
Partner Selection Strategy in Open, Dynamic and Sociable Environments Open
In multi-agent systems, agents with limited capabilities need to find a cooperation partner to accomplish complex tasks. Evaluating the trustworthiness of potential partners is vital in partner selection. Current approaches are mainly aver…
View article: Discriminating Brain Activation State in a Patient with Duchenne Muscular Dystrophy Using Near-Infrared Spectroscopy for Communication: An Exploratory Case Study
Discriminating Brain Activation State in a Patient with Duchenne Muscular Dystrophy Using Near-Infrared Spectroscopy for Communication: An Exploratory Case Study Open
Introduction: Maintaining means of communication is an extremely important issue in occupational therapy for patients with intractable neurological disease. A brain-computer interface (BCI) is a device control technology for utilizing phys…
View article: Investigating Mental Task Combination for Brain-Computer Interface Based on Brain State Discrimination Using Subjective Ratings
Investigating Mental Task Combination for Brain-Computer Interface Based on Brain State Discrimination Using Subjective Ratings Open
Brain-computer interface (BCI) has attracted attention as a means of assisting patients with intractable neurological diseases to communicate their intentions. However, there are no reports examining the mental tasks that are effective in …
View article: Can a saliency model using feature sets derived cityscapes predict cultural differences in visual search asymmetry?
Can a saliency model using feature sets derived cityscapes predict cultural differences in visual search asymmetry? Open
Visual search asymmetries in line length (long or short), line orientation (tilted or vertical), and circle with line versus circle vary in presence and magnitude depending on where they are measured (e.g., Canada, Japan, and the United St…
View article: Incorporating Lévy Flight to Distribution-Based Discrete Particle Swarm Optimization
Incorporating Lévy Flight to Distribution-Based Discrete Particle Swarm Optimization Open
Particle swarm optimization (PSO) has been extended and shown to perform well on discrete optimization. Some of the extended PSOs handle continuous parameters of probability distributions over variable values of candidate solutions instead…
View article: Study on Psychological Effects of Vibrotactile Stimuli Involving Emotional Synthetic Voice
Study on Psychological Effects of Vibrotactile Stimuli Involving Emotional Synthetic Voice Open
This study aims to investigate the psychological effects that occur when adding vibrotactile stimulation to remote communication. To make sure the psychological effect happened from vibrotactile stimulation; we conducted an experiment usin…
View article: Facial Expression Enhancement Using a Waggle Ear-type Device Linked to Eyebrows: Evaluation of Impressions and Conveying Emotions
Facial Expression Enhancement Using a Waggle Ear-type Device Linked to Eyebrows: Evaluation of Impressions and Conveying Emotions Open
Facial expressions convey emotions. However, not all people are good at understanding such expressions in daily communication. To address this issue, we herein use “SUGO-MIMI,” a lightweight device that does not require a power source to e…
View article: RNNPB-Trans for Rendering Emotions to Body Movements of Humanoid Robots
RNNPB-Trans for Rendering Emotions to Body Movements of Humanoid Robots Open
Currently, robots that are designed to communicate with people, such as service robots, are becoming popular. It is known that expressing emotions can make communication smoothly. Therefore, humanoid robots must have the means to express t…
View article: Improving Real-Time Brain State Classification of Motor Imagery Tasks During Neurofeedback Training
Improving Real-Time Brain State Classification of Motor Imagery Tasks During Neurofeedback Training Open
In this study, we investigated the effect of the dynamic changes in brain activation during neurofeedback training in the classification of the different brain states associated with the target tasks. We hypothesized that ongoing activatio…
View article: Examination of Optimal Mental Task for Brain-computer Interface using Functional Near-infrared Spectroscopy
Examination of Optimal Mental Task for Brain-computer Interface using Functional Near-infrared Spectroscopy Open
Brain-computer interface (BCI) is a new technology that enables communication for patients in totally locked-in state using brain activities. In this research, we examined optimal mental task for near-infrared spectroscopy-based BCI from a…
View article: CCDC 1915054: Experimental Crystal Structure Determination
CCDC 1915054: Experimental Crystal Structure Determination Open
View article: The Features of ECG Affected by Mood Change during Imagining the Near Future and a Mental States Estimation Model using the Features
The Features of ECG Affected by Mood Change during Imagining the Near Future and a Mental States Estimation Model using the Features Open
The purpose of this study is to estimate mental states quantitatively using an ECG signals for preventing depression and anxiety. Then, we focus on mood change during imagining the near future. ECG signals are measured from participants du…
View article: Hierarchical Reinforcement Learning Introducing Genetic Algorithm for POMDPs Environments
Hierarchical Reinforcement Learning Introducing Genetic Algorithm for POMDPs Environments Open
View article: A PSO based Approach to Assign Segments for Reducing Excavated Soil in Shield Tunneling
A PSO based Approach to Assign Segments for Reducing Excavated Soil in Shield Tunneling Open
View article: Comparison of Stress Relief Effects in Short-term Interaction with Robot-assisted Activity and Stuffed Animal-assisted Activity
Comparison of Stress Relief Effects in Short-term Interaction with Robot-assisted Activity and Stuffed Animal-assisted Activity Open
Although animal-assisted activity is attracting attention as one of mental health measures, it has many problems in its implementation. We compared stress relief effects in short-term interaction of robot-assisted activity and stuffed anim…
View article: Influence of Synchrony of Voice Fundamental Frequency in Dialogue between Human and Robots on Stress Relief Effects
Influence of Synchrony of Voice Fundamental Frequency in Dialogue between Human and Robots on Stress Relief Effects Open
近年，ロボットとのふれあいを通して精神的な癒しを与えるロボット・セラピーが注目を集めている．ロボット・セラピーに使用されるセラピーロボットは，簡易な音声反応をするものが多い．本稿では，そのようなロボットに対し同調傾向の考え方を導入し，コミュニケーション活性時に最も強く同調する基本周波数を直前のユーザの発話音声の基本周波数と同調させることによる心理的・生理的ストレス緩和作用への影響を，評価実験を通して検証した．その結果，応答音声の基本周波数をユーザの発話音声の基本周波数に同調…
View article: Importance of Soft Tactility on Robot-Assisted Therapy
Importance of Soft Tactility on Robot-Assisted Therapy Open
Robot-assisted therapy has gained attention as one of mental health measures. In this paper, we investigated the influences of soft tactility on psychological and physiological stress relief effects to verify whether soft robots or hard ro…
View article: Improved Volitional Recall of Motor-Imagery-Related Brain Activation Patterns Using Real-Time Functional MRI-Based Neurofeedback
Improved Volitional Recall of Motor-Imagery-Related Brain Activation Patterns Using Real-Time Functional MRI-Based Neurofeedback Open
Motor imagery (MI), a covert cognitive process where an action is mentally simulated but not actually performed, could be used as an effective neurorehabilitation tool for motor function improvement or recovery. Recent approaches employing…
View article: Proposal of Therapy Robot System Extracting Stress Relaxing Effects According to the Stress State
Proposal of Therapy Robot System Extracting Stress Relaxing Effects According to the Stress State Open
This paper proposed the therapy robot system working on the mind of the user according to the ever-changing stress state. To estimate the user's stress state by the wearable device capable of lowering restrictions on a user, we confirmed t…