We aim at engineering applications of reservoir computing using hardware chaotic neural networks, including associative memory recall. The reservoir layer used in reservoir computing is networked and constructed using Pu ... more
The sensation of drowsiness experienced around 2 PM, referred to as post-lunch dip (PLD), induces a decline in brain functions including attentiveness and levels of alertness. Such transient brain function declines insti ... more
Drivers show two types of stress-coping responses: active coping responses to stressful stimuli that they actively cope with and passive coping responses to stressful stimuli that they have no choice but to endure. Consi ... more
We developed an assist robot that changes its assist force in real time according to the lumbar load estimated from the load information on the hand measured using a hand sensor device and the posture information. Furthe ... more
Sleep apnea syndrome (SAS) is a disease that causes apnea during sleep, and since it correlates with lifestylerelated diseases, early detection and early treatment are important. Polysomnography (PSG) is generally used f ... more
In recent years, with the widespread adoption of remote work alongside traditional office work, the challenge of sharing the office atmosphere remotely has become evident. This difficulty has raised concerns about a lack ... more
There is a high demand for a safe and cost-effective method to inspect the tightness of bolts remotely, which are widely used in power plants. Since it is known that rigidity decreases of a structure due to bolt loosenin ... more
A Study on Personal Fit Control Design based on Extremum Seeking Approach
論文No: ページ数: 6 日付: 2024/07/01
著者: 槇野 泰大（広島大学大学院先進理工系科学研究科），宮腰 穂（広島大学大学院先進理工系科学研究科），脇谷 伸（広島大学大学院先進理工系科学研究科），山本 透（広島大学大学院先進理工系科学研究科），森重 智年（マツダ(株)），矢野 康英（マツダ(株)）
キーワード : ウェルビーイング，パーソナルフィット制御，極値探索制御，内部モデル制御 Well-being，personal fit control，extremum seeking control，internal model control
As WHO advocates well-being, people must be physically, mentally, and socially satisfied. Japan is aiming to realize well-being under a policy called Society 5.0. In this background, this study proposes a basic design sc ... more
The study considers a direct controller parameter design for regulatory control using one-shot experimental data contaminated with random disturbances. The proposed approach employs an idea of reference model matching, a ... more
This study considers data-driven controller parameter tuning for nonlinear systems using one-shot input-output data. The study addresses the model reference problem for a nonlinear system described by the parametric stri ... more
This paper proposes a bilateral control with a tension control considering joint torque for a tendon-driven robotic hand. This robotic hand has two joints and two degrees-of-freedom, which is driven by three tendons. Ten ... more
In geological surveys, a borehole camera is used to photograph the vertical cylindrical borehole-wall to investigate underground cracks. Currently, the identification of cracks from borehole-wall images is performed visu ... more
Performance Comparison of Semantic Segmentation Models and Loss Functions for Seat Belt Detection
論文No: ページ数: 7 日付: 2024/07/01
著者: Junya Sato (Faculty of Engineering, Gifu University), Takuya Akashi (Faculty of Science and Engineering, Iwate University)
キーワード : seat belt detection，semantic segmentation，convolutional neural network，deep learning
In Japan, despite seat belts being mandatory for drivers, some choose not to comply. This non-compliance is typically identified through visual inspections by police officers. However, Japan's population decline has faci ... more
Hypertension is a risk factor for cardiac and cerebrovascular disorders, and routine blood pressure monitoring is important for its early detection. The previous study that attempted to detect hypertension by applying CN ... more
Nicotiana Benthamiana, a candidate plant for plant-derived vaccines, is considered suitable for cultivation in a multi-stage plant factory. To increase area efficiency, we investigated the possibility of growing Nicotian ... more
Cattle blood tests are used for feed adjustment and early detection of disease. Conventional cattle blood tests pose infection risks and handling challenges. This paper proposes estimating blood glucose levels in cattle ... more
We propose an eye-gaze input system that utilizes a laptop PC and its inner camera. This system can discriminate the user’s eye-gaze direction by using Convolutional Neural Network (CNN) or Vision Transformer (ViT). In t ... more
Feedforward Optical Modulation Technology and its Application to Simultaneous Multi-channel BS Television Signal Modulation System
論文No: ページ数: 9 日付: 2024/07/01
著者: 郭 涛（富山大学 大学院理工学教育部 知能情報工学専攻），室谷 惇司（富山大学 大学院理工学教育部 知能情報工学専攻），菊島 浩二（富山大学 大学院理工学教育部 知能情報工学専攻）
キーワード : フィードフォワード，LN光変調器，BSテレビ信号変調システム feedforward，LN optical modulator，BS television signal modulation system
This paper presents we added a feedforward circuit to improve the signal quality by adding a feedforward circuit to the third-order distortion caused by increasing the modulation index of the LiNbO3(LN) optical modulator ... more
In this study, we propose an optical method for noninvasive and quantitative measurement of blood viscosity in extracorporeal circulatory device. Using self-made simulated blood images, we investigated a method to detect ... more
Deep Brain Stimulation (DBS) plays an important role as a promising clinical treatment for drug-resistant neurological and psychiatric disorders such as Parkinson's disease (PD), epilepsy, and major depression. Recently, ... more
The Effect of Virtual Reality Head-Mounted Display Stimulus in Sit-Stand Motor Imagery Training Paradigm
論文No: ページ数: 7 日付: 2024/06/01
著者: Phurin Rangpong (Tokyo Institute of Technology), Akima Connelly (Tokyo Institute of Technology), Pengcheng Li (Tokyo Institute of Technology), Theerawit Wilaiprasitporn (Vidyasirimedhi Institute of Science and Technology), Tohru Yagi (Tokyo Institute of Technology)
キーワード : motor imagery，brain-computer interface，electroencephalography，virtual reality，head-mounted display
Lower limb Motor Imagery (MI) of a sit-stand motion using electroencephalography (EEG) has been studied with the aim of rehabilitation. We aim to explore the use of self-perspective stimulus using virtual reality head-mo ... more
Design Method of Equiripple Linear-Phase FIR Filters with Specified Attenuation and Variable Stopband
論文No: ページ数: 6 日付: 2024/06/01
著者: 宮田 統馬（サレジオ工業高等専門学校），相川 直幸（東京理科大学）
キーワード : 可変ディジタルフィルタ，直線位相FIRフィルタ，多項次数削減，高速高精度計測 variable digital filter，linear-phase FIR filter，reduction of polynomial order，high speed and high accuracy measurement
Variable digital FIR filters (VDFs) are used to reduce noise in automatic weighing instruments. VDFs can reduce delay without degrading measurement accuracy by piecewise high attenuation in the stopband. However, convent ... more
This paper proposes a new event-triggered robust control system for robot manipulators, based on two event-triggered mechanisms (ETMs)，which lead to intermittent communication not only for the sensor-to-controller channe ... more
This study deals with the control problems for automating the operation of an excavator loading soil onto the back of a dump truck. In the loading operation, the bucket should not touch the dump truck and should spill as ... more
In multi-task learning, the goal is to improve the generalization performance of the model by exploiting the information shared across tasks. In this paper, we propose a neural network that simultaneously learns depth es ... more
Product Development Targeting Users from Whom It Is Difficult to Obtain Qualitative Data in the Initial Stage of Product Design
論文No: ページ数: 10 日付: 2024/06/01
著者: 秋本 芳伸（東京都立大学），下川原(佐藤) 英理（東京都立大学）
キーワード : 人間中心設計，ペルソナ，簡易ペルソナ，スパイラルモデル，書字学習支援デジタル教材 human-centred design，personas，assumption personas，spiral model，digital learning aid for writing
In the product design, it is important deeply understanding the profiles of target user. For deriving the user profiles, it is required to collect, organize, and analyze data on the target users. However, there are some ... more
A meat quality evaluation method based on the electrical characteristics has been proposed. In this paper, we developed a measurement system for the electromagnetic response of meat during the maturation process and eval ... more
Smartphone-Based Interferometry for Non-Invasive Assessment of Tear Film Lipid Layer Kinetics
論文No: ページ数: 5 日付: 2024/05/01
著者: Yoshiro Okazaki (Faculty of Human Science, Waseda University), Mamoru Iwabuchi (Faculty of Human Science, Waseda University), Norihiko Yokoi (Department of Ophthalmology, Kyoto Prefectural University of Medicine)
キーワード : dry eye，smartphone-based interferometer，tear film lipid layer，voigt model
Tear interferometers are used to observe the tear film lipid layer (TFLL) for dry eye examination in the clinical setting. However, these devices are large and expensive, and they are not accessible to the general public ... more
Exposure to time-varying, low-frequency and high-intensity magnetic field (MF) induce electric field (EF) inside the human body, producing stimulus effects such as nerve fiber excitation or synaptic modulation. To measur ... more
The Pick-and-place movements are used in the fields of light work and rehabilitation, but the evaluation method of the movements is based on the number of times and time, and the results may change depending on the subje ... more
