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5th International Renewable and Sustainable Energy Conference, IRSEC 2017

作者： Özden, Talat Turan, Raşit Aklnoǧlu, Bülent Gültekin Department of Electrical and Electronics Engineering Gumüshane University Gumushane29100 Turkey Ankara06800 Turkey Department of Physics Faculty of Arts and Sciences Middle East Technical University METU Ankara06800 Turkey Earth System Science Program Graduate School of Natural and Applied Sciences METU Ankara06800 Turkey

ISBN: (纸本)9781538628478

With the tremendous increase in the photovoltaic (PV) power plants world-wide remarkable decreases in their installation prices per watt are attained mainly due to economic scale effect. This brings questioning to increase their energy yields by considering any possible way like fabricating bifacial solar modules. Present study is on the performance analysis of a bifacial PV module using one-year outdoor testing results in Ankara-Turkey. The module performed very well and reached a specific yield value of 1750 kWh/kWp. This value for Central Anatolia region is well above the values predicted (and suggested) by the local authorities. The efficiency and performance ratio variation with respect to ambient and module temperature are obtained. The calculated dependence of efficiency on the module temperature is found to be η=-0.073Tmod+18.05, and the maximum measured module temperature is about 70 °C. The results show that the bifacial modules have the potential to replace the mono facial modules that are now dominating the PV market. © 2017 IEEE.

关键词： Solar energy

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Quantitative Analysis of Ankle Spasticity Through Electromyography Signal

Quantitative Analysis of Ankle Spasticity Through Electromyo...

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Medical Technologies National Conference (TIPTEKNO)

作者： Ayse Gurluk Hafiz Muhammad Bilal Elif Hocaoglu Living Robotics Laboratory Graduate School of Health Sciences Physiotherapy and Rehabilitation Program Istanbul Medipol University Istanbul Türkiye Living Robotics Laboratory Graduate School of Engineering and Natural Sciences Electrical-Electronics Engineering and Cyber-Systems Program Istanbul Medipol University Istanbul Türkiye Department of Electrical and Electronics Engineering Living Robotics Laboratory Istanbul Medipol University Istanbul Türkiye

ISBN: (数字)9798331529819

ISBN: (纸本)9798331529826

This study presents a more accurate evaluation method for assessing ankle spasticity compared to conventional goniometric techniques by utilizing measurements obtained from Inertial Measurement Units (IMU) and surface electromyography (sEMG) devices. Integrating IMU and EMG sensors provides substantial benefits for accurately determining the range of motion (ROM) associated with spasticity during targeted movements. In this study, the proposed method provides precise measurement and an objective evaluation of onset time detection of antagonistic muscle co-contraction, and accordingly the ROM of the actuated joint. Moreover, the implementation of cost-effective wearable sensors enables the monitoring of muscle spasticity in clinical environments and can be particularly valuable in regions with limited access to experienced therapists, providing a more efficient approach to tracking spasticity levels.

关键词： Ankle Measurement units Inertial navigation Muscles Electromyography Sensors Reliability Motion control Read only memory Monitoring

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Microfluidic device for refractive index measurement of fluid sample

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Procedia engineering 2010年 5卷 1340-1343页

作者： Sang Youl Yoon Sung Yang Graduate-program of Medical System Engineering GIST Gwangju Republic of Korea School of Information & Mechatronics GIST Gwangju Republic of Korea Department of Nanobio Materials and Electronics GIST Gwangju Republic of Korea

This paper represents a novel microfluidic device for simple refractive index (RI) measurement of fluid sample with sub microliter volume. The defocusing imaging technique using a three pinhole aperture plate is implemented for the refractive index measurement. For the self-calibration, the microfluidic device has a measurement region and a self-calibration region, and both regions are designed to be captured on single image frame. Thus, the refractive index of a sample fluid is automatically calculated with the self-calibration. For the demonstration of the proposed device, standard refractive index liquids with the refractive indices of 1.300, 1.400, 1.500, 1.600 and 1.700 are used. The measured refractive index has the maximum deviation of 0.0036 (0.24%) from the standard refractive index values.

关键词： Refractometer Microfluidic device Defocusing imaging Three pinhole Self-calibration Refractive index measurement

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An Efficient Moving Detection Methodology in Mobile Cloud Environment

An Efficient Moving Detection Methodology in Mobile Cloud En...

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International Conference on IT Convergence and Security (ICITCS)

作者： Changhee Cho Sanghyun Park Jinsul Kim Sang-Joon Lee Graduate School of Interdisciplinary Program of E-Commerce Chonnam National University Gwangju Korea School of Electronics & Computer Engineering Chonnam National University Gwangju Korea

ISBN: (纸本)9781479965427

In this paper, an optimal motion-sensing technique of indoor children's accident prevention system has been developed. There is a drawback in the existing detection algorithm due to the environment in a manner that recognizes the difference between the 1% and more frames of motion recognition accuracy. The proposed motion detection method is based on the background modeling technique to improve the accuracy. The method is obtained using the technique to solve the recognition errors arising from the surrounding environment. We are easy to recognize the danger area using mobile cloud-based smartphone, and provide notification to tell, remote control when children access to danger area. Also, for people to recognize the size of the minimum recognition (blob) to be able to adjust the children and to recognize accurately, we improve the existing algorithms. Through the experiments, based on an improved algorithm, we derived the optimal value for children.

关键词： Motion detection Streaming media Accuracy Accidents Mobile communication Radiofrequency identification Cameras

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Effect of White Noise on Working Memory Using Event-Related Potentials

Effect of White Noise on Working Memory Using Event-Related ...

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Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

作者： Seung-Won Lee Jun-Seok Lee Han-Jeong Hwang Department of Electronics and Information Engineering Korea University Sejong Korea Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology Korea University Sejong Korea

ISBN: (数字)9798350367331

ISBN: (纸本)9798350367348

We investigated the effect of white noise on working memory performance using electroencephalography (EEG). Six healthy subjects participated in this study, and each subject performed a 2-back task under white noise and no sound conditions. After a series of EEG preprocessing, the amplitude of event-related potential (ERP) was calculated. The results indicated an increase in average accuracy and mean P300 amplitude during the white noise condition compared to without it, suggesting that white noise might enhance working memory performance. However, due to the limited number of participants, statistical power was not attained. In our future studies, we will perform additional experiments with more subjects.

关键词： Electric potential Accuracy Asia Information processing White noise Electroencephalography

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A Study on Time Efficiency of CSMA/CA in Inter-Vehicle Communication Systems

A Study on Time Efficiency of CSMA/CA in Inter-Vehicle Commu...

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IEEE Global Conference on Consumer electronics (GCCE)

作者： Masashi Kato Masahiro Fujii Graduate School of Engineering Utsunomiya University 7-1-2 Yoto Utsunomiya Tochigi Tochigi Japan Graduate Program in Information Electrical and Electronics Systems Engineering Utsunomiya University 7-1-2 Yoto Utsunomiya Tochigi Tochigi Japan

ISBN: (数字)9781728135755

ISBN: (纸本)9781728135762

CSMA/CA has been widely accepted as a Media Access Control scheme for Inter-Vehicle Communication systems. In CSMA/CA, a mobile station waits a frame transmission during a backoff interval based on random value. Then, the mobile station transmits the frame if the others do not transmit any frames. In this paper, we evaluate system performances of CSMA/CA from the viewpoint of a time efficiency and average frame delay time varying the range of random value by network simulations.

关键词： Access protocols Access control Telecommunication traffic Multiaccess communication Media Access Protocol Wireless communication

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Broadening factors of E1(LO) phonon-plasmon coupled modes of hexagonal InN investigated by infrared reflectance measurements

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Physical Review B 2007年第4期76卷 045206-045206页

作者： Yoshihiro Ishitani Takashi Ohira Xinqiang Wang Son-Bek Che Akihiko Yoshikawa Graduate School of Electrical and Electronics Engineering Venture Business Laboratory InN project as a CREST program JST Chiba University 1-33 Yayoicho Inage-ku Chiba 263-8522 Japan

The LO phonon-plasmon coupling of InN for the E1(LO) mode has been found; however, the decoupling for the A1(LO) mode has been reported in many issues. Several reports have discussed the electron- and phonon-scattering mechanisms, while there is no detailed investigation on the broadening factors of mode energies even for E1(LO) phonon-plasmon coupled scheme. In this issue, the studied InN layers grown by the molecular-beam epitaxy method have residual electron density obtained by Hall measurements in a range from 8×1017to1×1019cm−3. The electron density measured by infrared reflectance measurements is almost constant with a temperature variation from 5to300K. The dependence of the observed broadening factors of the E1(LO) phonon-plasmon coupled modes on the electron density is found to show the characteristic properties of the level anticrossing, in particular, for the increase of these broadening factors around the level anticrossing region with the temperature increase from 5to300K. Compared to the recent report on the LO phonon-plasmon coupled modes for A1(LO), smaller broadening for E1(LO) is observed here.

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Blockchain technology in finance industry

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Transactions of the Korean Institute of Electrical Engineers 2019年第12期68卷 1601-1606页

作者： Youn, Seongwook Cho, Hyun-Chong Dept. of Software Korea National University of Transportation Korea Republic of Dept. of Electronics Engineering Interdisciplinary Graduate Program for BIT Medical Convergence Kangwon National University Korea Republic of

Blockchain is a peer-to-peer public ledger which guarantees the reliability of all the transactional record without a trusted third party. Basically, all the participants in the network create transactional record, examine the validity of the transaction, and keep the valid transactional record. The whole finance industry including banks and fintechs recognizes the value of the blockchain because of its efficiency and secure mechanism. In this paper, we explained the blockchain mechanism by providing its basic principles, strengths and weaknesses. Then, we provided what comes with it in the finance industry. Though there are still a few disadvantages such as persistence, and lack of the standard improvements and modifications in blockchain technology could overcome them and lead to the broader acceptance. Blockchain is definitely a disruptive technology in the financial system. Copyright © The Korean Institute of Electrical Engineers.

关键词： Smart contract

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Hierarchical B-frame Video Coding Using Two-Layer CANF without Motion Coding

arXiv

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arXiv 2023年

作者： Alexandre, David Hang, Hsueh-Ming Peng, Wen-Hsiao Electrical Engineering and Computer Science International Graduate Program Institute of Electronics Department of Computer Science National Yang Ming Chiao Tung University Hsinchu Taiwan

Typical video compression systems consist of two main modules: motion coding and residual coding. This general architecture is adopted by classical coding schemes (such as international standards H.265 and H.266) and deep learning-based coding schemes. We propose a novel B-frame coding architecture based on two-layer Conditional Augmented Normalization Flows (CANF). It has the striking feature of not transmitting any motion information. Our proposed idea of video compression without motion coding offers a new direction for learned video coding. Our base layer is a low-resolution image compressor that replaces the full-resolution motion compressor. The low-resolution coded image is merged with the warped high-resolution images to generate a high-quality image as a conditioning signal for the enhancement-layer image coding in full resolution. One advantage of this architecture is significantly reduced computational complexity due to eliminating the motion information compressor. In addition, we adopt a skip-mode coding technique to reduce the transmitted latent samples. The rate-distortion performance of our scheme is slightly lower than that of the state-of-the-art learned B-frame coding scheme, B-CANF, but outperforms other learned B-frame coding schemes. However, compared to B-CANF, our scheme saves 45% of multiply–accumulate operations (MACs) for encoding and 27% of MACs for decoding. The code is available at https://***. Copyright © 2023, The Authors. All rights reserved.

关键词： Image coding

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Design and implementation of a human stress detection system: A biomechanics approach

Design and implementation of a human stress detection system...

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International Symposium on Mechatronics and Its Applications, ISMA

作者： Mohammad S. Sharawi Murad Shibli Mohammad I. Sharawi Computer Engineering Department Philadelphia University Amman Jordan Mechanical Engineering Department and Mechatronics Graduate Program American University Sharjah UAE Electronics Engineering Department Princess Sumaya University for Technology Amman Jordan

This paper presents the design and mechatronics implementation of a human stress detection system (HSDS) using a biomechanics approach. A simple, compact and easy to use system is developed and built on a 2-layer PCB. It consists of two transducers, an LCD display and a micro-controller chip along with their respective interfacing circuits. After characterizing the two transducers, an algorithm was developed based on the measurements to classify the human stress condition. A simple classification rule that was adopted revealed that the system can detect 78% of the stressed examinees. The overall system success rate in identifying one of three states (relaxed, half stressed and stressed) was 60%. One major application for HSDS could be in the automotive industry were the driver condition is constantly monitored, and if a stress state is detected, the driver can be notified to stop the car and relax.

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