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Input optics systems of the KAGRA detector during O3GK (vol 2023, 023F01, 2023)

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2023年第5期2023卷

作者： Akutsu, T. Ando, M. Arai, K. Arai, Y. Araki, S. Araya, A. Aritomi, N. Asada, H. Aso, Y. Bae, S. Bae, Y. Baiotti, L. Bajpai, R. Barton, M. A. Cannon, K. Cao, Z. Capocasa, E. Chan, M. Chen, C. Chen, K. Chen, Y. Chiang, C-I Chu, H. Chu, Y-K Eguchi, S. Enomoto, Y. Flaminio, R. Fujii, Y. Fujikawa, Y. Fukunaga, M. Fukushima, M. Furuhata, T. Gao, D. Ge, G-G Ha, S. Hagiwara, A. Haino, S. Han, W-B Hasegawa, K. Hattori, K. Hayakawa, H. Hayama, K. Himemoto, Y. Hiranuma, Y. Hirata, N. Hirose, E. Hong, Z. Hsieh, B-H Huang, G-Z Huang, H-Y Huang, P. Huang, Y-C Huang, Y-J Hui, D. C. Y. Ide, S. Ikenoue, B. Imam, S. Inayoshi, K. Inoue, Y. Ioka, K. Ito, K. Itoh, Y. Izumi, K. Jeon, C. Jin, H-B Jung, K. Jung, P. Kaihotsu, K. Kajita, T. Kakizaki, M. Kamiizumi, M. Kanbara, S. Kanda, N. Kang, G. Kataoka, Y. Kawaguchi, K. Kawai, N. Kawasaki, T. Kim, C. Kim, J. Kim, J. C. Kim, Ws Kim, Y-M Kimura, N. Kita, N. Kitazawa, H. Kojima, Y. Kokeyama, K. Komori, K. Kong, A. K. H. Kotake, K. Kozakai, C. Kozu, R. Kumar, R. Kume, J. Kuo, C. Kuo, H-S Kuromiya, Y. Kuroyanagi, S. Kusayanagi, K. Kwak, K. Lee, H. K. Lee, H. W. Lee, R. Leonardi, M. Li, K. L. Lin, L. C-C Lin, C-Y Lin, F-K Lin, F-L Lin, H. L. Liu, G. C. Luo, L-W Majorana, E. Marchio, M. Michimura, Y. Mio, N. Miyakawa, O. Miyamoto, A. Miyazaki, Y. Miyo, K. Miyoki, S. Mori, Y. Morisaki, S. Moriwaki, Y. Nagano, K. Nagano, S. Nakamura, K. Nakano, H. Nakano, M. Nakashima, R. Nakayama, Y. Narikawa, T. Naticchioni, L. Negishi, R. Quynh, L. Nguyen Ni, W-T Nishizawa, A. Nozaki, S. Obuchi, Y. Ogaki, W. Oh, J. J. Oh, S. H. Ohashi, M. Ohishi, N. Ohkawa, M. Ohta, H. Okutani, Y. Okutomi, K. Oohara, K. Ooi, C. Oshino, S. Otabe, S. Pan, K-C Pang, H. Parisi, A. Park, J. Arellano, F. E. Pena Pinto, I. Sago, N. Saito, S. Saito, Y. Sakai, K. Sakai, Y. Sakuno, Y. Sato, S. Sato, T. Sawada, T. Sekiguchi, T. Sekiguchi, Y. Shao, L. Shibagaki, S. Shimizu, R. Shimoda, T. Shimode, K. Shinkai, H. Shishido, T. Shoda, A. Somiya, K. Son, E. J. Sotani, H. Sugimoto, R. Suresh, J. Suzuki, T. Suzuki, T. Tagoshi, H. Takahashi, H Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Research Center for the Early Universe The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Institute for Cosmic Ray Research KAGRA Observatory The University of Tokyo 5-1-5 Kashiwa-no-Ha Kashiwa City Chiba 277-8582 Japan Accelerator Laboratory High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Earthquake Research Institute The University of Tokyo 1-1-1 Yayoi Bunkyo-ku Tokyo 113-0032 Japan Department of Mathematics and Physics Graduate School of Science and Technology Hirosaki University 3 Bunkyo-cho Hirosaki Aomori 036-8561 Japan Kamioka Branch National Astronomical Observatory of Japan 238 Higashi-Mozumi Kamioka-cho Hida City Gifu 506-1205 Japan The Graduate University for Advanced Studies (SOKENDAI) 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Korea Institute of Science and Technology Information 245 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea National Institute for Mathematical Sciences 70 Yuseong-daero 1689 Beon-gil Yuseong-gu Daejeon 34047 Republic of Korea International College Osaka University 1-1 Machikaneyama-cho Toyonaka City Osaka 560-0043 Japan School of High Energy Accelerator Science The Graduate University for Advanced Studies (SOKENDAI) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Department of Astronomy Beijing Normal University Xinjiekouwai Street 19 Haidian District Beijing 100875 China Department of Applied Physics Fukuoka University 8-19-1 Nanakuma Jonan Fukuoka City Fukuoka 814-0180 Japan Department of Physics Tamkang University No. 151 Yingzhuan Road Danshui Dist. New Taipei City 25137 Taiwan Department of Physics

KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25 to March 10, 2020, and its first joint observation with the GEO 600 detector from April 7 to April 21, 2020 (O3GK). This study presents an overview of the input optics systems of the KAGRA detector, which consist of various optical systems, such as a laser source, its intensity and frequency stabilization systems, modulators, a Faraday isolator, mode-matching telescopes, and a high-power beam dump. These optics were successfully delivered to the KAGRA interferometer and operated stably during the observations. The laser frequency noise was observed to limit the detector sensitivity above a few kilohertz, whereas the laser intensity did not significantly limit the detector sensitivity.

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The control of brain network dynamics across diverse scales of space and time

arXiv

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arXiv 2019年

作者： Tang, Evelyn Baum, Graham L. Roalf, David R. Satterthwaite, Theodore D. Pasqualetti, Fabio Bassett, Danielle S. Department of Bioengineering School of Engineering & Applied Science University of Pennsylvania PA19104 United States Max Planck Institute for Dynamics and Self-Organization Göttingen37079 Germany Neuroscience Graduate Program Perelman School of Medicine University of Pennsylvania PA19104 United States Department of Psychiatry Perelman School of Medicine University of Pennsylvania PA19104 United States Department of Mechanical Engineering University of California Riverside RiversideCA92521 United States Department of Physics & Astronomy College of Arts & Sciences University of Pennsylvania PA19104 United States Department of Electrical & Systems Engineering School of Engineering & Applied Science University of Pennsylvania PA19104 United States Department of Neurology Perelman School of Medicine University of Pennsylvania PA19104 United States

The human brain is composed of distinct regions that are each associated with particular functions and distinct propensities for the control of neural dynamics. However, the relation between these functions and control profiles is poorly understood, as is the variation in this relation across diverse scales of space and time. Here we probe the relation between control and dynamics in brain networks constructed from diffusion tensor imaging data in a large community based sample of young adults. Specifically, we probe the control properties of each brain region and investigate their relationship with dynamics across various spatial scales using the Laplacian eigenspectrum. In addition, through analysis of regional modal controllability and partitioning of modes, we determine whether the associated dynamics are fast or slow, as well as whether they are alternating or monotone. We find that brain regions that facilitate the control of energetically easy transitions are associated with activity on short length scales and slow time scales. Conversely, brain regions that facilitate control of difficult transitions are associated with activity on long length scales and fast time scales. Built on linear dynamical models, our results offer parsimonious explanations for the activity propagation and network control profiles supported by regions of differing neuroanatomical structure. Copyright © 2019, The Authors. All rights reserved.

关键词： Brain

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Performance of the prototype shaftless small scale horizontal wind turbine for electricity generating from industrial exhaust air system

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IOP Conference Series: Earth and Environmental Science 2020年第1期463卷

作者： Wachira Puttichaem Yuttanant Boonyongmaneerat Pakpachong Vadhanasindhu Sompong Putivisutisak Technopreneurship and Innovation Management Program Graduate School Chulalongkorn University Bangkok 10330 Thailand Metallurgy and Materials Science Research Institute (MMRI) Chulalongkorn University Bangkok 10330 Thailand Faculty of Commerce and Accountancy Chulalongkorn Business School Chulalongkorn University Bangkok 10330 Thailand Advanced Computational Fluid Dynamics Research Unit Department of Mechanical Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand

Man-made or unnatural wind from the industrial exhaust air system is an alternative wind resource for countries with natural low-speed or intermittent wind such as Thailand. It has strong and consistent wind speed when compared to the natural wind, with velocity about 5 to 10 m/s at a distance of 5 cm from the exhaust air outlet. However, some negative impacts to the exhaust air system performance was observed when a conventional wind turbine was employed. The objective of this research is to feasibility study the practicality of a prototype shaftless small scale horizontal axis wind turbine (SSHWT) to generate electricity from the exhaust air of the industrial exhaust air system. Aerodynamic, blade and generator designs were addressed in this study to maximize energy output and minimize negative impacts to the performance of the original exhaust air system. The performance of SSHWT was tested with a selected industrial fan that is widely used in industrial sections. The results showed that the SSHWT could generate electricity with less negative effect to exhaust air system performance. However, it still needs further improvements caused by the voltage output is too low. By the concept design, this innovative wind turbine is compact, thus needs only small space for installation. This SSHWT has high market potential for low wind speed countries to take advantage of unnatural wind resources which are better in terms of efficiency and economy for sustainable energy development.

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Mapping the Conceptual Relationship among Data Analysis, Knowledge Generation and Decision-making in industrial Processes

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Procedia Manufacturing 2017年 11卷 1751-1758页

作者： dos Santos, Cleiton Ferreira Piechnicki, Flávio de Freitas Rocha Loures, Eduardo Santos, Eduardo Alves Portela Pontifical Catholic University of Paraná (PUC-PR) Graduate Program in Production and Systems Engineering (PPGEPS) 1155 Imaculada Conceição Street Curitiba 80215-901 Brazil

In accordance with Industry 4.0, data should be used for process and/or system integration, including the decision-making process. In this context, this paper aims to relate the process of decision-making with process mining through concept maps, assisting the areas of Data engineering and Analytics. To do so, some Multiple-Criteria Decision-Making/Analysis (MCDM/A) methods will be addressed in order to conceptually highlight the relationship between knowledge and decision dimensions. As a result, the definitions about these fields of study allow perceiving an information and knowledge conciliation approach promoted by the integrated view of process mining and MCDM/A methods. © 2017 The Authors

关键词： Concept Map Industry 4.0. Knowledge Discovery Multiple-Criteria Decision-Making/Analysis (MCDM/A) Process Mining (PM)

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Fabrication of 2000 series aluminum lap joint sheets by magnetic pulse welding and their interfacial microstructure observations

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Keikinzoku/Journal of Japan Institute of Light Metals 2017年第1期67卷 8-15页

作者： Itoi, Takaomi Inoue, Syoichi Okagawa, Keigo Department of Mechanical Engineering Faculty of Engineering Chiba University 1-33 Yayoi-cho Inage-ku Chiba-shi Chiba263-8522 Japan Division of Artificial Systems Science Graduate School of Engineering Chiba University Chiba-shi Chiba Japan Tokyo Metropolitan College of Industrial Technology Shinagawa-ku Tokyo Japan

Lap joint sheets of 2017-T3/2017-T3 and 2024-T3/2024-T3 were fabricated by magnetic pulse welding (MPW). Tensile shear tests were performed on the welded sheet, and a good lap joint was achieved at a discharge energy more than 3.0 kJ for both lap joint sheets. Weld interface showed wavy morphology when the bonding at an adequate amount of discharge energy. Weld width of the lap joint sheets tend to increase with increasing of discharge energy. Collision speed calculated from collision time was 211 m/s and estimated 1.5 GPa of the collision pressure at discharge energy of 3.5 kJ. SEM and EDS results showed that the weld interface exhibited no significant contrast of intermediate layer and oxides. A Metal jet was observed as aggregates of fine particles with size of less than 100 nm at the outside of bonded area. From TEM observation at the bonding interface, Al phases between flyer and parent sheets had direct contact without the intervention of the oxide, and localized melting was not recognized. From these obtained results, good lap joint is attributed to true-contact of Al phases, an increasing of weld width, the anchor effect, and work hardening at weld interface. © 2017 The Japan Institute of Light Metals.

关键词： Microstructure

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Welding characteristics and effect of gap length on 2000 series aluminum alloy sheet lap joints welded by magnetic pulse welding

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Keikinzoku/Journal of Japan Institute of Light Metals 2017年第9期67卷 423-429页

作者： Itoi, Takaomi Inoue, Shoichi Okagawa, Keigo Department of Mechanical Engineering Faculty of Engineering Chiba University 1-33 Yayoi-cho Inage-ku Chiba-shi Chiba263-8522 Japan Division of Artificial Systems Science Graduate School of Engineering Chiba University Chiba-shi Chiba Japan Tokyo Metropolitan College of Industrial Technology Shinagawa-ku Tokyo Japan

Effect of gap length on welding characteristics of 2000 series aluminum alloy sheets in magnetic pulse welding (MPW) was investigated. Collision time for the 2017-T3 sheet welded at gap length of 1.2 mm and 4.6 mm were 6.16 μs and 16.9 μs respectively, which were increased with increasing of gap length. The collision speed calculated from collision times increased as the gap length increased, showed a maximum value of 380 m/s with a gap length of 2.0 mm, and then the speed declined. This result indicates that it is possible to join sheets at a higher collision speed even with the same discharge energy by adjusting an appropriate gap length. Strong lap joint was achieved for the 2024-T3/2024-T6 and the 2024-T3/7075-T6 lap joint sheets by welding condition of gap length more than 1.0 mm. Thus, it could be possible to improve the weld strength by widening the gap length and performing MPW at high collision speed. SEM and HAADF-STEM observations showed no clear oxide films formed on the weld interface. From microstructure observation, it was considered that lap joints fabricated by MPW were welded at solid state. © 2017 The Japan Institute of Light Metals.

关键词： Interfaces (materials)

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Green Logistics Approach in Bioethanol Conversion from Potato Starch in Central Java

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IOP Conference Series: Materials Science and engineering 2019年第1期598卷

作者： R Yusianto Marimin Suprihatin H Hardjomidjojo Graduate Program of Agro-Industrial Technology Bogor Agricultural University (IPB) Bogor Indonesia Department of Agro-Industrial Technology Faculty of Agricultural Technology Bogor Agricultural University (IPB) Bogor Indonesia Division of Industrial and Systems Engineering (TSI) Bogor Agricultural University (IPB) Bogor Indonesia

The demand for alternative sources of fossil fuel energy in Indonesia is increasing. One alternative to fossil fuels is bioethanol. Potato skin starch can be a raw material for making bioethanol. Potato skin contains starch, cellulose, hemicellulose, lignin and sugar. Bioethanol can be used must go through several stages, including the logistics system. Logistics activities require transportation, material handling equipment, and warehouses. In Indonesia, transportation sector which is the biggest user of fuel actually receives fuel subsidies. Bioethanol is the most appropriate alternative solution to replace gasoline. In processing, bioethanol through five stages, namely, potato skin starch, raw material logistics, processing bioethanol, delivery process and customer. This study presents green logistics model of potato transportation with a cost model and GWP. The results of the study show that the green logistics model by looking at the total costs and environmental impacts can be used as a reference in developing environmentally friendly bioethanol production in the future.

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Numerical simulation of fire in a gasoline storage tank in reduced-scale

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Defect and Diffusion Forum 2017年 372卷 11-20页

作者： Miranda, Renan Spilka Indrusiak, Maria Luiza Sperb Centeno, Felipe Roman University of Vale do Rio dos Sinos Polytechnic School São LeopoldoRS Brazil University of Vale do Rio dos Sinos Graduate Program in Mechanical Engineering São LeopoldoRS Brazil Federal University of Rio Grande do Sul Department of Mechanical Engineering Porto AlegreRS Brazil

With the increasing demand for energy and fuels in Brazil, the storage of liquid fuels in multiple tanks is becoming much more usual, posing challenges from the point of view of fire safety. To study this type of phenomenon and to evaluate its possible causes, detecting failures such as ones in design and erection of storage systems or in detection and protection equipment, numerical simulations are performed based on real data. This work presents numerical simulations of a small-scale tank for gasoline storage, based on an experimental study reported in literature. The present research shows results related to temperature in the region adjacent to the tank on fire, fuel mass burning rate, heat release rate and average flame height. Comparisons are made between numerical and experimental results, as well as with available literature results for similar conditions. In addition to gasoline type C (which has anhydrous ethanol in its composition), also gasoline type A (anhydrous ethanol free) is considered. The results obtained for simulations with gasoline type A presented better agreement with literature data than those for gasoline type C, the differences being due to the variable composition of the type C fuel. For example, the reported fuel mass burning rate for gasoline in literature is 0.045 kg/(m2·s), while the present simulations provided values of 0.038 kg/(m2·s) for type C and 0.047 kg/(m2·s) for type A. © 2016 Trans Tech Publications.

关键词： Gasoline

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Effect of temperature field and mechanical properties of casting on prediction of hot tearing tendency using FEM thermal stress analysis+1

Effect of temperature field and mechanical properties of cas...

引用

作者： Takai, Ryosuke Tsunoda, Tatsuya Kawada, Yasutaka Hirohara, Rei Okane, Toshimitsu Yoshida, Makoto Department of Modern Mechanical Engineering Waseda University Tokyo169-8555 Japan Department of Modern Mechanical Engineering Graduate School of Creative Science and Engineering Waseda University Tokyo169-8555 Japan National Institute of Advanced Industrial Science and Technology Ibaraki305-8564 Japan Kagami Memorial Research Institute for Materials Science and Technology Waseda University Tokyo169-0051 Japan IHI Corp. Tokyo135-8710 Japan Honda Motor Co. Ltd. Tokyo107-8556 Japan Toshiba Energy Systems and Solutions Corp. Kawasaki212-8585 Japan Honda Engineering Co. Ltd. Haga-gun Tochigi321-3325 Japan

It is known that hot tearing tendency increases with the increase in the cooling rate of casting during the solidification. As the direct control factors of the hot tearing, the cooling rate dependences of the temperature field of the casting and the mechanical property of alloys in the semisolid state have been implied. However, quantitative evaluation is not clarified yet to show which parameters is more important to predict hot tearing tendency. In this study, through the thermal stress analysis using cooling rate-dependent temperature fields of casting and cooling rate-dependent creep parameters in the semi-solid state, hot tearing tendency was predicted for an AlMg alloy during the solidification. For the prediction, the maximum principal creep strain accumulated during the solidification was used as the indicator of hot tearing tendencies. Then, the hot tearing tendencies were compared with experimental results. As a result, in the cooling rate range of this study which was corresponding to gravity die casting, it was found that the temperature fields are relatively more critical to predict hot tearing tendency than the creep parameters. © 2018 Japan Foundry engineering Society.

关键词： Solidification

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Localization of an autonomous personnel carrying vehicle in indoor environments 17

Localization of an autonomous personnel carrying vehicle in ...

引用

2017 International Conference on Mechatronics systems and Control engineering, ICMSCE 2017

作者： Altuǧ, Erdinç Gelbal, Şükrü Yaren Keçeci, Emin Faruk Gültekin, Mehmet Kabil Faculty of Mechanical Engineering Istanbul Technical University Gümüşsuyu Istanbul Turkey Mechatronics Graduate Program Istanbul Technical University Gümüşsuyu Istanbul Turkey Department of Mechanical Engineering Abdullah Gül University Kayseri Turkey System Dynamics and Control Graduate Program Istanbul Technical University Gümüşsuyu Istanbul Turkey

ISBN: (纸本)9781450352079

There is an emerging need of intelligent vehicles on indoor environments such as university campuses, airports or shopping malls. These intelligent vehicles can help elderly, disabled, or people with heavy luggage. This paper describes an intelligent vehicle that can be used indoor as well as outdoor areas for this purpose. Finding the exact location for indoor robots is not an easy task, since Global Positioning System (GPS) is not available indoors. In this work onboard sensors such as motor encoder and steering-wheel encoder were used to obtain localization estimates. The errors are determined to be low even when the vehicle travels long distances. © 2017 ACM.

关键词： Vehicles

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