Electronics and Communications in Japan最新文献_第10页

Development of an intention estimation model based on gaze and face information for electric wheelchair operation support 基于注视和面部信息的电动轮椅操作支持意图估计模型的建立

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-08-04 DOI: 10.1002/ecj.12367

Sho Higa, Koji Yamada, Shihoko Kamisato

引用次数: 0

Formation of silicone thin films by ArF excimer laser induced photo-desorption ArF准分子激光诱导光解吸形成有机硅薄膜

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-08-03 DOI: 10.1002/ecj.12366

Masayuki Okoshi

引用次数: 0

Proposal of circuit configuration to reduce power supply voltage and circuit scale for CMOS exponentiation conversion IC utilizing weak inversion operation 提出一种利用弱反转运算的CMOS指数转换集成电路的电路结构，以降低电源电压和电路规模

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-08-03 DOI: 10.1002/ecj.12374

Fumiya Matsui, Naoya Nishiyama, Yuji Sano

引用次数: 0

Investigation of formation and ultrasonic disassembling of RBC Aggregation aimed for maintenance of blood channel 以维持血通道为目的的红细胞聚集体形成及超声拆解的研究

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-08-02 DOI: 10.1002/ecj.12371

Mayu Hatakeyama, Yuichiro Akamatsu, Takayuki Sato

引用次数: 0

Salivary uric acid sensor using the fordable “Finger-Powered” microfluidic device 唾液尿酸传感器采用可负担的“手指供电”微流体装置

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-07-30 DOI: 10.1002/ecj.12363

Hiroyuki Kudo, Takuya Shibahara, Yoshiki Tojyo

{"title":"Salivary uric acid sensor using the fordable “Finger-Powered” microfluidic device","authors":"Hiroyuki Kudo, Takuya Shibahara, Yoshiki Tojyo","doi":"10.1002/ecj.12363","DOIUrl":"https://doi.org/10.1002/ecj.12363","url":null,"abstract":"Here, we report a novel biosensing system using a finger-powered microfluidic device, which is suitable for daily self-testing of uric acid in saliva. To realize the rapid determination of salivary uric acid, the biosensing system measures directly from the paper-based saliva sampling device. The microfluidic device has the diaphragm pump, the reagent reservoir, and the reaction cell in which the electrochemical uric acid biosensor is embedded. Once the microfluidic chip has been folded, the finger-powered microfluidic device prepares the reagent containing the saliva, which is ready to measure. A wireless potentiostat for electrochemical measurement of uric acid with the biosensor was also developed. Combining these elements together, the whole process from saliva sampling to determination was completed in less than a minute (Sensitivity: 0.03 nA/μM). The measurement results were also consistent with that measured using a commercially available uric acid determination kit. Hence, our method is expected to have the potential to enhance the use of biochemical information in the field of healthcare IoT.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 3","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137731151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graph theoretical analysis of EEG after audiovisual stimulation in different anxiety states 不同焦虑状态下视听刺激后脑电图的图论分析

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-03-15 DOI: 10.1002/ecj.12341

Yusuke Yamamoto M.S., Ayumi Muramatsu M.S., Yuko Mizuno-Matsumoto M.D., Ph.D.

{"title":"Graph theoretical analysis of EEG after audiovisual stimulation in different anxiety states","authors":"Yusuke Yamamoto M.S., Ayumi Muramatsu M.S., Yuko Mizuno-Matsumoto M.D., Ph.D.","doi":"10.1002/ecj.12341","DOIUrl":"https://doi.org/10.1002/ecj.12341","url":null,"abstract":"In this study, a brain network was created using graph theoretical analysis based on electroencephalography (EEG) data. The purpose of the study was to investigate the functional connectivity of the brain in different states of anxiety. Seventeen adults with anxiety (A-G), and 13 adults without anxiety (AF-G) were examined. They were given three different stimulations: resting, pleasant, and unpleasant. EEG was measured immediately after the stimulation. The EEG was analyzed by Fast Fourier Transform (FFT), coherence analysis, and graph theory. The results of FFT and coherence analysis showed that the anxiety group (A-G) had higher power spectra and coherence values than those for the anxiety-free group (AF-G) in all sessions. The results of graph theory analysis showed that the clustering coefficient and small-worldness in A-G were lower than those in AF-G, although the characteristic path length in A-G was higher than that in AF-G. This study shows that the brain of A-G has smaller clusters and longer paths to compare with those of AF-G. These events suggest that the brain of A-G would have an inefficient network structure to transmit emotional information.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 2","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137845702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of heart rate variability from heart rate measured with wristwatch-type heart rate monitor 由腕表式心率监测仪测量的心率估计心率变异性

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-03-12 DOI: 10.1002/ecj.12351

Kiyoko Yokoyama, Emi Hayashi, Hisatoshi Ito, Yuko Kawahara

{"title":"Estimation of heart rate variability from heart rate measured with wristwatch-type heart rate monitor","authors":"Kiyoko Yokoyama, Emi Hayashi, Hisatoshi Ito, Yuko Kawahara","doi":"10.1002/ecj.12351","DOIUrl":"https://doi.org/10.1002/ecj.12351","url":null,"abstract":"HF and LF/HF, which are parameters of the frequency domain of the electrocardiogram R-R interval time series, are general index of the autonomic nervous activity balance. Most wristwatch-type heart-rate monitors measure heart rate from sphygmograph and interpolate missing data. These are the causes of reducing the calculation accuracy of LF and HF. The purpose of this study is to propose a method for estimating LF and HF calculated from the ECG R-R interval time series from the heart-rate time series at 1-s intervals measured by a wristwatch-type heart-rate monitor. Six hundred and seventy data-set with a length of 120 s measured simultaneously with an electrocardiogram and a wristwatch-type heart-rate monitor during standing cooking operation, up-right standing, watching slide show in standing posture, and resting supine position were used. Seventy percent dataset were used for modeling, and remaining 30% were used for evaluating model. As a result, the coefficient of determination of LF and HF were 0.441 and 0.467, respectively in the one-variable polynomial regression model. The coefficient of determination of LF and HF were 0.557 and 0.644, respectively in the multivariable regression model, based on Random Forest and time domain indices.\u0000","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 2","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137832248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A proposal of eye glance input interface using smartphone built-in camera 一种基于智能手机内置摄像头的眼神输入接口方案

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-03-05 DOI: 10.1002/ecj.12347

Yu Saiga, Tota Mizuno, Yu Matsumoto, Kazuyuki Mito, Naoaki Itakura

{"title":"A proposal of eye glance input interface using smartphone built-in camera","authors":"Yu Saiga, Tota Mizuno, Yu Matsumoto, Kazuyuki Mito, Naoaki Itakura","doi":"10.1002/ecj.12347","DOIUrl":"https://doi.org/10.1002/ecj.12347","url":null,"abstract":"The purpose of this study is to develop a line-of-sight input interface using the eye-glance input method, which uses a glance eye movement and method of estimating the eye-control movement by analyzing the image of the area near the eye-ball. The motion was discriminated by taking an image using the built-in camera of a smartphone to rapidly look at the four corners of the smartphone and calculate the moving distance of the eyeball, which was divided into horizontal and vertical components using the optical flow function in Open CV library. In the experiment, we obtained data by asking the subjects to look at the reciprocate of quick gaze movements at each of the four corners and the center of the screen. As a result of data analysis, characteristics of waveforms were obtained for the movements looking at the four corners, and we could determine which of the four corners the users were looking at. Furthermore, by distinguishing between camera shake and line-of-sight movement using the variance value, the discrimination rate was 90% or more even when held in the hand. It was shown that the Eye Glance movement can be measured with a smartphone as well as a PC.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 2","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137486517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GAs with escape from stagnation of search for multiset iteration permutations problem – consecutive meals planning 多集迭代排列问题的逃避停滞搜索的GAs -连续进餐计划

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-03-04 DOI: 10.1002/ecj.12342

Tomoko Kashima PhD, Yukiko Orito PhD, Hiroshi Someya PhD

引用次数: 0

Evaluation of a hydrogen signal detection method using a compact NMR sensor for the measurement of ion concentrations in culture medium 用紧凑的核磁共振传感器测量培养基中离子浓度的氢信号检测方法的评价

IF 0.3 4区工程技术

Electronics and Communications in Japan Pub Date : 2022-03-02 DOI: 10.1002/ecj.12346

Seiichi Ohkawara, Kentaro Miura, Harutoyo Hirano PhD, Satoshi Ota PhD, Masato Futagawa PhD

{"title":"Evaluation of a hydrogen signal detection method using a compact NMR sensor for the measurement of ion concentrations in culture medium","authors":"Seiichi Ohkawara, Kentaro Miura, Harutoyo Hirano PhD, Satoshi Ota PhD, Masato Futagawa PhD","doi":"10.1002/ecj.12346","DOIUrl":"https://doi.org/10.1002/ecj.12346","url":null,"abstract":"In recent years, the demand for highly nutritious and functional vegetables has been increasing in the agricultural sector. In order to cultivate highly functional vegetables, it is necessary to adjust the nutrients in the soil, such as potassium ions, to an optimal state. Therefore, there is a need for a sensor that can measure soil ion concentration in real time in the field. In this report, we aim to develop an ion concentration sensor using Nuclear Magnetic Resonance (NMR). Since the sensor observes atomic specific behavior, it has the potential to measure the concentration of each ion species in soil where multiple ions exist. In this study, we aim to realize compact NMR and to establish a method for NMR measurement of water ahead of ion measurement. Using an NMR measurement system of our own design, we measured water and air. As a result, NMR signal spectra were obtained only when measuring water under resonance conditions, and resonance frequency of hydrogen atoms were successfully measured. We have established an NMR signal measurement method for measuring ion concentrations using a small NMR sensor that can be installed in the agriculture.","PeriodicalId":50539,"journal":{"name":"Electronics and Communications in Japan","volume":"105 2","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137776500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0