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2019 International Conference on Laser Deposition: Nanostructures, Hetero-structures and 2D layers, iCold 2019

作者： Charishma Veena Devi Shastrimath, V. Bairy, Raghavendra Murari, M.S. Jayarama, A. Pinto, Richard Department of Electronics and Communication Engineering NMAM Institute of Technology Nitte Karkala574110 India Department of Physics NMAM Institute of Technology Nitte Karkala574110 India DST PURSE Program Mangalore University Mangalagangothri574199 India Department of Physics Alva's Institute of Engineering and Technology Moodbidri574225 India Department of Electronics and Communication Engineering Alva's Institute of Engineering and Technology Moodbidri574225 India Affiliated to Visvesvaraya Technological University Belagavi India

In the area of material science and technology, fabrication and characterization of nano-materials play an important role since it leads to the development of devices with interesting performance and potential applications in electronics, magnetics, optics, and photonics. Among the materials perovskite materials are gaining prominence. In this investigation, thin films of bismuth ferrite have been prepared and the impact of co-substitution of barium on their structural, morphological and optical properties have been studied. The spray pyrolysis procedure was used to prepare the thin films of bismuth ferrite with medium thickness by doping barium with concentrations of 1%, 3%, 5% and 10%. Various characterization techniques were employed to study the films. The presence of barium, bismuth and iron in the samples was confirmed by EDAX spectra. X-Ray diffraction studies confirmed the polycrystalline nature of the films having a rhombohedrally distorted pervoskite crystal structure fitting to space group R3c. The Scherrer rule was applied to obtain the crystallite size which was found to be small. Surface morphology studies carried out using field emission scanning electron microscopy revealed that the grain size and roughness of the films are modified with increase in doping concentration. The measurement results of optical absorption showed an increase in optical band gap with doping with barium. The results of structural, morphological and optical parameters with the increasing doping concentration indicate that these films are promising candidate for applications in opto-electronics, photovoltaics and gas sensors. © 2019 Elsevier Ltd.

关键词： Perovskite

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Modulation performance for visible light communications

Modulation performance for visible light communications

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International Conference of Information and communication Technology for Embedded Systems (IC-ICTES)

作者： Ek-amorn Shinwasusin Chalie Charoenlarpnopparut Prapun Suksompong Attaphongse Taparugssanagorn Electronics and Communication Engineering Program Thammasat University Thailand Wireless Communication Security and Eco-Electronics Research Unit National Electronics and Computer Technology Center Pathum Thani Thailand

LEDs can transport the signal or data via visible light instead of radio wave in some place that the radio wave will effect the human or damage the component. Therefore, this paper presents about the digital modulation for improving not only data rate and bit error rate but also flickering, colour rendering, dimming range, luminous efficacy rate that are required to keep in a satisfactory level. There are many types of the modulation that have different property. Therefore, the literature review is discussed and shows the comparison of Return-to-zero On-Off Keying (RZ-OOK), Non-Return-to-zero On-Off Keying (NRZOOK), and Binary Phase Shifted Keying (BPSK) in the form of analytical and simulation by the graph of BER versus SNR and also the comparative table of On-Off Keying (OOK), Colour Shifted Keying (CSK), Pulse Position Modulation (PPM), Pulse Width Modulation (PWM), and Orthogonal Frequency Division Multiplexing (OFDM).

关键词： Mathematical model Image color analysis Wireless communication Analytical models Binary phase shift keying Signal to noise ratio

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A comparative evaluation of competitive learning algorithms for edge detection enhancement

A comparative evaluation of competitive learning algorithms ...

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13th European Signal Processing Conference, EUSIPCO 2005

作者： Sirin, Tuba Saglam, Mehmet Izzet Erer, Isin Gokmen, Muhittin Ersoy, Okan Informatics Institute Advanced Technologies in Engineering Computer Science and Engineering Maslak Istanbul 34469 Turkey Informatics Institute Advanced Technologies in Engineering Satellite Communication and Remote Sensing Program Maslak Istanbul 34469 Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Department Maslak Istanbul 34469 Turkey Faculty of Electrical and Electronic Engineering Computer Engineering Department Istanbul Technical University Maslak Istanbul 34469 Turkey Purdue University School of Electrical and Computer Engineering West Lafayette IN United States

ISBN: (纸本)1604238216

Most edge detection algorithms include three main stages: smoothing, differentiation, and labeling. In this paper, we evaluate the performance of algorithms in which competitive learning is applied first to enhance edges, followed by an edge detector to locate the edges. In this way, more detailed and relatively more unbroken edges can be found as compared to the results when an edge detector is applied alone. The algorithms compared are K-Means, SOM and SOGR for clustering, and Canny and GED for edge detection. Perceptionally, best results were obtained with the GED-SOGR algorithm. The SOGR is also considerably simpler and faster than the SOM algorithm.

关键词： Edge detection

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Evaluation of 3D Virtualization Accuracy for VR-Based Personal Basketball Team-Practice System 10

Evaluation of 3D Virtualization Accuracy for VR-Based Person...

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10th IEEE Global Conference on Consumer electronics, GCCE 2021

作者： Honma, Hiroki Iida, Yoshiaki Okumura, Yasuyuki Fujii, Katsuyuki Umehira, Masahiro Nanzan University Graduate Program of Mechatronics Graduate School of Science And Engineering Nagoya Japan Nanzan University Physical Education Center Nagoya Japan Nanzan University Faculty of Science And Engineering Department of Mechatronics Nagoya Japan Department of Electronics And Communication Technology Faculty of Science And Engineering Nanzan University Nagoya Japan

ISBN: (纸本)9781665436762

In basketball game, players need to learn how to take a next appropriate action by judging various situations with surrounding players through team practice. Such decision-making capabilities in individual practice with virtual reality (VR) technologies can significantly improve the efficiency of team practice. This paper proposes a VR-based basketball team practice learning system which provides VR environments similar to the actual team practice environments by arranging players in a virtual space Proto-type application for smartphones has been developed for 3D virtualization accuracy evaluation where the smartphone is used for team practice to sense the distance between the player and surrounding VR players This paper describes the evaluation results of 3D virtualization accuracy measured by the experiments. © 2021 IEEE.

关键词： Virtual reality

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Prototype development of VR based personal zone defense practice equipment 4

Prototype development of VR based personal zone defense prac...

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4th IEEE Global Conference on Life Sciences and Technologies, LifeTech 2022

作者： Honma, Hiroki Iida, Yoshiaki Okumura, Yasuyuki Fujii, Katsuyuki Umehira, Masahiro Nanzan University Graduate Program of Mechatronics Graduate School of Science and Engineering Nagoya Japan Nanzan University Physical Education Center Nagoya Japan Nanzan University Faculty of Science and Engineering Department of Mechatronics Nagoya Japan Nanzan University Faculty of Science and Engineering Department of Electronics and Communication Technology Nagoya Japan

ISBN: (纸本)9781665419048

In a basketball game, players must act appropriately according to the position and movement of the player. This needs to be learned through team practice. Therefore, if we can build an environment that allows even one person to practice as a team, the efficiency of practice can be greatly improved. It is effective to use virtual reality (VR) technology to realize team practice alone. This paper proposes a VR-based basketball team practice learning system that provides VR environments similar to the actual team practice environments by arranging players in a virtual space. Focusing on zone defense practice, which is said to be difficult to learn even in team practice, we propose a practice system for orthodox 3-2 zone tactics. In addition, because the distance between the player and the surrounding VR player is important for this system, this paper presents the evaluation result of the 3D virtualization accuracy measured by the experiment. © 2022 IEEE.

关键词： Virtual reality

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Dynamic Radio Map Using Statistical Hypothesis Testing

Dynamic Radio Map Using Statistical Hypothesis Testing

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作者： Katagiri, Keita Sato, Koya Inage, Kei Fujii, Takeo Advanced Wireless and Communication Research Center University of Electro-Communications Tokyo182-8585 Japan Department of Electrical Engineering Tokyo University of Science Tokyo125-8585 Japan Electrical and Electronics Engineering Program Tokyo Metropolitan College of Industrial Technology Tokyo140-0011 Japan

Private fifth-generation mobile communication networks (5G) have garnered considerable attention for providing various communication services. In private 5G systems, such as those employed in smart factories, it is necessary to appropriately manage the interference power among diverse systems because each nonpublic operator deploys a gNodeB in the local area and utilizes a similar allocated frequency. Several researchers have discussed the use of a radio map, which stores the spatial distribution of received signal power values as a tool for managing intra-system interference. Radio maps are typically applied to television white space, where the location of the base station (BS) is fixed and the average value of the received signal power exhibits time-invariant characteristics. However, in private 5G networks, the estimation accuracy using a conventional radio map is lowered because the location of the BS may be changed when the factory is rearranged. In this study, a database server is used to infer a significant difference in the average values of the received signal power by means of Welch's ${t}$ -test;the server then updates the radio map based on the test results. The simulation results indicate that the proposed method can detect changes in the BS location and update the radio map accurately. © 2015 IEEE.

关键词： 5G mobile communication systems

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High-quality factor, double notch, IIR digital filter design using optimal pole re-position technique with controllable passband gains

High-quality factor, double notch, IIR digital filter design...

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International Conference on Electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： C. Charoenlarpnopparut P. Charoen A. Thamrongmas S. Samurpark P. Boonyanant Electronics and Communication Engineering Program School of Information Computer and Communication Technology Sirindhorn International Institute of Technology Thammasat University Thailand National Electronics and Computer Technology Center NSTDA Thailand

Digital IIR notch filter has been employed in various communication systems to eliminated unwanted narrowband interference with known frequency. In this paper, the optimal multiple notch filter design is proposed based on the pole re-position technique. The optimality considered is based on the minimization of resulting filter magnitude response from the ideal notch magnitude response, measured in term of numerical sum of error square. Furthermore, by using Grobner basis, the symbolic solution and design method can be generalized to the higher number of notch frequencies case. The design algorithm can be implemented directly on Matlab platform and optimal filter coefficients can be found via numerical optimization/search. The advantage of the proposed algorithm is that the designer can specify additional performance parameters such as stability margin (distant from largest pole to the nearest point on the unit circle), maximum passband gain and quality factor.

关键词： Digital filters Optimal control Passband IIR filters Frequency Algorithm design and analysis communication system control Narrowband Interference elimination Design methodology

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Cost-Effective, Integrated In Vitro Phantoms for Cardiac MRI

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Critical Reviews in Biomedical engineering 2021年第3期49卷 7-16页

作者： Chikop, Shivaprasad Ashok Konar, Amaresha Shridhar Reddy, Nimitha S. L. Vajuvalli, Nithin Keelara, Darshan Shivaram Kumnoor, Ashwini Raghuraman, Sairamesh Venkatesan, Ramesh Geethanath, Sairam Medical Imaging Research Center Dayananda Sagar Institutions Karnataka Bengaluru India Computer Science and Engineering Dayananda Sagar University Karnataka Bengaluru India Department of Electronics and Communication Dayananda Sagar University Karnataka Bengaluru India Wipro-GE Healthcare Karnataka Bengaluru India MR Research Program Columbia University New YorkNY United States

To provide lab scale in vitro phantom solutions for cardiac MR (CMR) studies that can be used for imaging structure and function as well as calorimetric measurements. The phantoms were purposed to accept user inputs such as beats per minute (BPM) and flow rate. We developed two generations of phantoms. The first phantom was developed using poly vinyl alcohol driven by a mechanical setup. The second was a 3D-printed phantom controlled through a user interface (UI) and a peristaltic pump. These phantoms were scanned for the characteristics mentioned above, which were qualitatively and quantitatively assessed through postprocessing of CMR images and compared with in vivo data. © 2021 by Begell House, Inc. ***.

关键词： 3D printers

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The effects of curvature of edge screen on subjective feelings in smartphone usage

The effects of curvature of edge screen on subjective feelin...

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Human Factors and Ergonomics Society 2017 International Annual Meeting, HFES 2017

作者： Lee, Yushin Lee, Joong Hee Kim, Yong Min Lee, Jihwan Kwon, Sanghyun Sim, Hyungmin Yun, Myung Hwan Department of Industrial Engineering Seoul National University Seoul08826 Korea Republic of Technology Management Economics and Policy Program Seoul National University Seoul08826 Korea Republic of Mobile Communication Business Samsung Electronics Suwon16677 Korea Republic of

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Efficient scheduling request algorithm for opportunistic wireless access

Efficient scheduling request algorithm for opportunistic wir...

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IEEE MTT-S International Microwave Workshop Series on Intelligent Radio for Future Personal Terminals

作者： Haewoon Nam Mohamed-Slim Alouini Department of Electronics and Communication Engineering Hanyang University Ansan Korea Electrical Engineering Program KAUST Thuwal Makkah Province Saudi Arabia

An efficient scheduling request algorithm for opportunistic wireless access based on user grouping is proposed in this paper. Similar to the well-known opportunistic splitting algorithm, the proposed algorithm initially adjusts (or lowers) the threshold during a guard period if no user sends a scheduling request. However, if multiple users make requests simultaneously and therefore a collision occurs, the proposed algorithm no longer updates the threshold but narrows down the user search space by splitting the users into multiple groups iteratively, whereas the opportunistic splitting algorithm keeps adjusting the threshold until a single user is found. Since the threshold is only updated when no user sends a request, it is shown that the proposed algorithm significantly alleviates the burden of the signaling for the threshold distribution to the users by the scheduler. More importantly, the proposed algorithm requires a less number of mini-slots to make a user selection given a certain scheduling outage probability.

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