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2024 International Symposium on Antennas and Propagation, ISAP 2024

作者： Yamamoto, Tsunayuki Kobashi, Takeo Maruyama, Tamami Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama-shi Japan Advanced Electronics and Information System Engineering Course National Institute of Technology Tsuyama College Tsuyama-shi Japan Department of Production Systems Engineering Institute of Technology Hakodate College Hakodate-shi Japan

ISBN: (纸本)9798350364774

In this paper, two technologies of metamaterial for microwave wireless power transfer are shown. One is a zeroth-order resonance for a microwave snow melting system, and another one is a focusing reflector for realizing of a highly efficient wireless power transfer space. A zeroth-order resonance leads a uniformed microwave heating and a flexibility of feeding in a snow melting system. Focusing reflector can make some electromagnetic hot and null points in a space. These are expected to be required technologies for highly efficient wireless power transfer. © 2024 IEEE.

关键词： Reflection

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Research on Measurement system of Upper Limb by Using Single Monocular Web Camera and Inference AI

Research on Measurement System of Upper Limb by Using Single...

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Rehabilitation engineering and Assistive Technology (i-CREATe), International Convention on

作者： Suman Shrestha Hibiki Takami Yuichiro Honda Mitsuru Irie Department of Production System Engineering major Osaka Sangyo University Japan Department of Rehabilitation Course of Prosthetics and Orthotics Faculty of Health Sciences University of Human Arts and Sciences Japan Department of Electrical Electronics and Information Engineering Osaka Sangyo University Japan Department of Production System Engineering Osaka Sangyo University Japan

ISBN: (数字)9798350355154

ISBN: (纸本)9798350355161

This study introduces “UpperLimbs,” an advanced upper limb motion measurement system that utilizes a monocular web camera and inference AI to simplify the traditional elaborate setups required for three-dimensional motion measurement. Using the MediaPipe AI framework, this system is capable of identifying joint positions and depth information from a single camera's video feed. The efficacy of UpperLimbs was validated against a traditional marker-based system, demonstrating comparable accuracy and potential for significant improvements in rehabilitation and prosthetic training. Further enhancements were explored through various image processing techniques, including image sharpening, noise reductions. The implementation of low-pass filters in time domain and calculated offsets further optimized the system's accuracy, making UpperLimbs a promising tool for accessible and efficient upper limb motion analysis, particularly for individuals using prosthetic hand.

关键词： Training Visualization Accuracy Tracking Low-pass filters Cameras Motion capture Real-time systems Artificial intelligence Time-domain analysis

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Basic Study for Transfer Learning for Autonomous Driving in Car Race of Model Car 6

Basic Study for Transfer Learning for Autonomous Driving in ...

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6th International Conference on Business and Industrial Research, ICBIR 2021

作者： Chiba, Shohei Sasaoka, Hisayuki National Institute of Technology Asahikawa College Advanced Course of Production System Engineering Asahikawa Japan National Institute of Technology Asahikawa College Dep. of Electrical and Computer Engineering Asahikawa Japan

ISBN: (纸本)9781665433495

Reinforcement learning, deep learning, and deep reinforcement learning can effectively acquire action rules for the autonomous motion of objects. However, some researchers have reported that the machine learning process requires a large amount of learning time. Besides, the process needs to consider the similarity of the environment between the training target and the test target. There is no such thing as driving only on a course learned in advance in actual autonomous driving. In this study, we have used a transfer learning algorithm for autonomous drivings for model cars. The training target for acquiring the learning model and the actual driving courses are changed. In this study, we report on the effectiveness of transfer learning using a model car as the basis for a learning model acquired by reinforcement learning. © 2021 IEEE.

关键词： Deep learning

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Optical Evanescent Field for Direct Observation of Sub-100nm Particle Motion on Glass Surface 1

Optical Evanescent Field for Direct Observation of Sub-100nm...

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1st International Conference on Robotics, engineering, Science, and Technology, RESTCON 2024

作者： Khajornrungruang, Panart Permpatdechakul, Thitipat Suzuki, Keisuke Blattler, Aran Terayama, Yutaka Goto, Daiki Phaisalpanumas, Pipat Bun-Athuek, Natthaphon Phunopas, Amornphun Kyushu Institute of Technology Iizuka-Shi Mechanical Science and Technology Division Dept. of Intelligent and Control System Faculty of Computer Science and Systems Engineering Fukuoka Japan Kyushu Institute of Technology Iizuka-Shi Mechanical Information Science and Technology Division Dept. of Interdisciplinary Informatics Graduate School of Computer Science and Systems Engineering Fukuoka Japan King Mongkut's University of Technology North Bangkok Bangsue Faculty of Engineering Dept. of Production and Robotics Engineering Bangkok Thailand Kyushu Institute of Technology Iizuka-Shi Mechanical Science and Technology Course Dept. of Intelligent and Control System Graduate School of Computer Science and Systems Engineering Fukuoka Japan King Mongkut's University of Technology North Bangkok Bangsue Faculty of Engineering Dept. of Industiral Engineering Bangkok Thailand King Mongkut's University of Technology North Bangkok Bangsue College of Industrial Technology Dept. of Mechanical Engineering Technology Bangkok Thailand

ISBN: (纸本)9798350348842

To directly investigate the dynamic nanoscale phenomenon on the surface being processed in wet conditions such as precision polishing, and cleaning in semiconductor industrial, an optical method for visualization and observation of each sub-100 nm sized particle that is moving on an interface such as a silica glass surface by applying an evanescent field have been proposing. Subsequently, we developed an experimental apparatus equipped with an optical microscopy system for verifying the moving particle observation method in a laboratory scale. This article introduces some experimentally direct observation results of duplicated wet processes. © 2024 IEEE.

关键词： Visualization

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Research on Metamaterial Technology for Microwave Wireless Power Transfer

Research on Metamaterial Technology for Microwave Wireless P...

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International Symposium on Antennas and Propagation (ISAP)

作者： Tsunayuki Yamamoto Takeo Kobashi Tamami Maruyama Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama-shi Japan Advanced Electronics and Information System Engineering Course National Institute of Technology Tsuyama College Tsuyama-shi Japan Department of Production Systems Engineering Institute of Technology Hakodate College Hakodate-shi Japan

ISBN: (数字)9798350364774

ISBN: (纸本)9798350364781

关键词： Microwave antennas Microwave technology Electromagnetic heating Snow Focusing Wireless power transfer Resonance Metamaterials Electromagnetics Microwave propagation

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Exploration of an Efficient Method for Removing Antibiotics from Water and Digested Sewage Sludge Using Fe(Vi): Kinetics and P Phytoavailability and Compostability in Treated Sludge

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SSRN 2023年

作者： Limmun, Warunee Ishikawa, Nao Maeda, Takeki Umeda, Takayuki Song, Jie Sasamoto, Makoto Umita, Teruyuki Ito, Ayumi Department of Frontier Matters and Function Engineering Graduate School of Engineering Iwate University Morioka020-8551 Japan Department of Engineering King Mongkut's Institute of Technology Ladkrabang Prince of Chumphon Campus 17/1 Chumko Pathio Chumphon86160 Thailand Course of Civil and Environmental Engineering Department of System Innovation Engineering Faculty of Science and Engineering Iwate University Morioka020-8551 Japan Department of Food Production and Environmental Management Faculty of Agriculture Iwate University 3-18-34 Ueda Morioka020-8550 Japan Technical Office Faculty of Science and Engineering Iwate University Morioka020-8551 Japan

Potassium ferrate (K2FeO4) containing hexavalent iron [Fe(VI)] is an environmentally friendly oxidant, which possesses strong oxidizing power to treat wastewater and sludge. Therefore, the present study investigated degradation of selected antibiotics, namely levofloxacin (LEV), ciprofloxacin (CIP), oxytetracycline (OTC), and azithromycin (AZI), in water and anaerobically digested sewage sludge samples using Fe(VI). The effects of different Fe(VI) concentrations and initial pH values on antibiotic removal efficiency were evaluated. Under the studied conditions, LEV and CIP were almost completely removed from water samples, following second-order kinetics. In addition, over 60% of the four selected antibiotics were removed from sludge samples using 1 g·L-1 Fe(VI). Furthermore, P phytoavailability and compostability of Fe(VI)-treated sludge were evaluated using different extraction reagents and a small composting unit. The extraction efficiency of phytoavailable P using 2% citric acid and neutral ammonium citrate was approximately 40% and 70%, respectively. The mixture of Fe(VI)-treated sludge and rice husk was self-heated in a closed composting reactor through the biodegradation of organic matter derived from the treated sludge. Therefore, Fe(VI)-treated sludge may be utilized as an organic material containing phytoavailable P for compost. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

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Exploration of an efficient method for removing antibiotics from water and digested sewage sludge using Fe(VI): Kinetics and P phytoavailability and compostability in treated sludge

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Chemosphere 2023年第1期336卷 139165页

作者： Limmun, Warunee Ishikawa, Nao Maeda, Takeki Umeda, Takayuki Song, Jie Sasamoto, Makoto Umita, Teruyuki Ito, Ayumi Department of Frontier Matters and Function Engineering Graduate School of Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan Department of Engineering King Mongkut's Institute of Technology Ladkrabang Prince of Chumphon Campus 17/1 Chumko Pathio Chumphon 86160 Thailand Course of Civil and Environmental Engineering Department of System Innovation Engineering Faculty of Science and Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan Department of Food Production and Environmental Management Faculty of Agriculture Iwate University Ueda 3-18-34 Morioka020-8550 Japan Technical Office Faculty of Science and Engineering Iwate University Ueda 4-3-5 Morioka020-8551 Japan

Potassium ferrate (K2FeO4) containing hexavalent iron [Fe(VI)] is an environmentally friendly oxidant, which possesses strong oxidizing power to treat wastewater and sludge. Therefore, the present study investigated degradation of selected antibiotics, namely levofloxacin (LEV), ciprofloxacin (CIP), oxytetracycline (OTC), and azithromycin (AZI), in water and anaerobically digested sewage sludge samples using Fe(VI). The effects of different Fe(VI) concentrations and initial pH values on antibiotic removal efficiency were evaluated. Under the studied conditions, LEV and CIP were almost completely removed from water samples, following second-order kinetics. In addition, over 60% of the four selected antibiotics were removed from sludge samples using 1 g L−1 Fe(VI). Furthermore, P phytoavailability and compostability of Fe(VI)-treated sludge were evaluated using different extraction reagents and a small composting unit. The extraction efficiency of phytoavailable P using 2% citric acid and neutral ammonium citrate was approximately 40% and 70%, respectively. The mixture of Fe(VI)-treated sludge and rice husk was self-heated in a closed composting reactor through the biodegradation of organic matter derived from the treated sludge. Therefore, Fe(VI)-treated sludge may be used as an organic material containing phytoavailable P for compost. © 2023 Elsevier Ltd

关键词： Antibiotics

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Optical Evanescent Field for Direct Observation of Sub-100nm Particle Motion on Glass Surface

Optical Evanescent Field for Direct Observation of Sub-100nm...

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Robotics, engineering, Science, and Technology (RESTCON), International Conference on

作者： Panart Khajornrungruang Thitipat Permpatdechakul Keisuke Suzuki Aran Blattler Yutaka Terayama Daiki Goto Pipat Phaisalpanumas Natthaphon Bun-Athuek Amornphun Phunopas Dept. of Intelligent and Control System Faculty of Computer Science and Systems Engineering Mechanical Science and Technology Division Kyushu Institute of Technology Iizuka-Shi Fukuoka Japan Dept. of Interdisciplinary Informatics Graduate School of Computer Science and Systems Engineering Mechanical Information Science and Technology Division Kyushu Institute of Technology Iizuka-Shi Fukuoka Japan Dept. of Production and Robotics Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangsue Bangkok Thailand Dept. of Intelligent and Control System Graduate School of Computer Science and Systems Engineering Mechanical Science and Technology Course Kyushu Institute of Technology Iizuka-Shi Fukuoka Japan Dept. of Industiral Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangsue Bangkok Thailand Dept. of Mechanical Engineering Technology College of Industrial Technology King Mongkut’s University of Technology North Bangkok Bangsue Bangkok Thailand

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3D Map Generation for Decommissioning Work

3D Map Generation for Decommissioning Work

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International Conference on Intelligent Autonomous systems (ICoIAS)

作者： Ryoma Hanabusa Yasuto Nagase Satoshi Mitsui Toshifumi Satake Naoki Igo Advanced Course of Production System Engineering National Institute of Technology Asahikawa College Asahikawa Japan Control and Information Engineering National Institute of Technology Asahikawa College Asahikawa Japan

ISBN: (数字)9781728160788

ISBN: (纸本)9781728160795

At the Fukushima Daiichi Nuclear Power Station (NPS), robots are used to propel the decommissioning work. Creating a 3D map of the internal environment of the decommissioning work is a necessary technology for improving the working efficiency of a decommissioning robot. The purpose of this research is to realize a 3D map creating a system using a camera by operating the humanoid general-purpose robot Pepper using the Robot Operating system (ROS) and implementing and executing Visual SLAM. The system aims to be applied to a decommissioning robot in the future. In this study, we implemented Visual SLAM methods R-tab Map, which is a method for constructing 3D maps in real-time, and Large-Scale Direct SLAM, which is method that generates a map using luminance with a large gradient between frames without using features for map generation. We also compared and evaluated the effectiveness of the generated maps. Besides, the robot was manually operated using nao_teleop, which can operate Pepper from the ROS library with the PS3 controller, the visualization software rviz, and the point cloud visualization library PointCloudViewer. Using two Visual SLAM's methods, we implemented the experiment. During the experiment, a chair was placed in front of Pepper as an obstacle. In this environment, Pepper was rotated 360 [deg] by manual operation. However, nao_teleop and Visual SLAM methods caused a conflict between the manual operation of Pepper and the 3D map generation process, and both processes stopped. Therefore, the 3D map wasn't generated. To resolve the conflict with operation, Pepper was moved by human and the experiment was again. As a result, the camera image obtained from Pepper was distorted, the map could not be optimized. Therefore, the part of 3D map was only generated. For this reason, to realize a 3D map generation system, it was important to properly calibrate the camera that could acquire a flat image without distortion.

关键词： Three-dimensional displays Cameras Libraries Robot vision systems

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Deformation in axial compression of aluminum tubular structures with ribs

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Keikinzoku/Journal of Japan Institute of Light Metals 2019年第8期69卷 379-386页

作者： Yokoya, Keisuke Miyazaki, Makoto Tojo, Yusuke Yamashita, Minoru Institute of Technology Nagano College Advanced Course of Production and Environment System National 716 Tokuma Nagano-shi Nagano381-8550 Japan Department of Mechanical Engineering Tokyo Institute of Technology [2-12-1 Ookayama School of Engineering Meguro-ku Tokyo152-8552 Japan Department of Mechanical Engineering National Institute of Technology Nagano Japan DENSO Aircool Corporation Japan Department of Mechanical Engineering Gifu University Japan

Dynamic compression behavior of various kinds of polygonal tubular structures with ribs are investigated. Square hollow structures and that with rib reinforcement of aluminum extrusions are in dynamic axial compression, using a drop hammer. Numerical simulation was also conducted for the wider variety of cross-sectional shapes and reinforcements. The effect of the axial length, cross-sectional shape and reinforcing rib arrangement on the deformation behavior were investigated. Comparable compressive force was obtained when the cross-sectional area of the structure is similar, even if the number of edges in cross-section increases from four (square) to eight. Rib reinforcement is very effective for the improvement of the crush or energy absorbing performance. Deformation behavior was successfully predicted by the numerical simulation. Numerical simulation of the compression of the various polygonal tubular structures with radial ribs was also carried out. The number of radial ribs in cross-section of the polygonal hollow structure has a positive relationship to the deformation constraint at corners and the torsional rigidity, consequently, the crush resistance increased. © 2019 The Japan Institute of Light Metals.

关键词： Reinforcement

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