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Keeping speed and distance for aligned motion

Physical Review E 2015年第1期91卷 012807-012807页

作者： Illés J. Farkas Jeromos Kun Yi Jin (金祎) Gaoqi He (何高奇) Mingliang Xu (徐明亮) MTA-ELTE Statistical and Biological Physics Research Group (Hungarian Academy of Sciences) Pázmány Péter sétány 1A Budapest 1117 Hungary Regional Knowledge Center ELTE Faculty of Sciences Irányi Dániel u. 4. Székesfehérvár 8000 Hungary Department of Biological Physics Eötvös University Pázmány Péter sétány 1A Budapest 1117 Hungary Department of Computer Science and Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing 100191 China School of Information Engineering Zhengzhou University 100 Science Avenue Zhengzhou 450001 China

The cohesive collective motion (flocking, swarming) of autonomous agents is ubiquitously observed and exploited in both natural and man-made settings, thus, minimal models for its description are essential. In a model with continuous space and time we find that if two particles arrive symmetrically in a plane at a large angle, then (i) radial repulsion and (ii) linear self-propelling toward a fixed preferred speed are sufficient for them to depart at a smaller angle. For this local gain of momentum explicit velocity alignment is not necessary, nor are adhesion or attraction, inelasticity or anisotropy of the particles, or nonlinear drag. With many particles obeying these microscopic rules of motion we find that their spatial confinement to a square with periodic boundaries (which is an indirect form of attraction) leads to stable macroscopic ordering. As a function of the strength of added noise we see—at finite system sizes—a critical slowing down close to the order-disorder boundary and a discontinuous transition. After varying the density of particles at constant system size and varying the size of the system with constant particle density we predict that in the infinite system size (or density) limit the hysteresis loop disappears and the transition becomes continuous. We note that animals, humans, drones, etc., tend to move asynchronously and are often more responsive to motion than positions. Thus, for them velocity-based continuous models can provide higher precision than coordinate-based models. An additional characteristic and realistic feature of the model is that convergence to the ordered state is fastest at a finite density, which is in contrast to models applying (discontinuous) explicit velocity alignments and discretized time. To summarize, we find that the investigated model can provide a minimal description of flocking.

关键词： Autonomous agents

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EEG analysis during sleep by using morphological local pattern spectrum

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ICIC Express Letters 2013年第5期7卷 1469-1474页

作者： Miyanishi, Kohei Yamaguchi, Tomonari Fujio, Mitsuhiko Inoue, Katsuhiro Department of Systems Design and Informatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka Japan

Time-frequency analysis methods such as short-time Fourier transform and wavelet transform are applied to investigate characteristic from non-stationary signal. In this study, we proposed redundant morphological wavelet analysis that was a kind of nonlinear discrete wavelet and redundant wavelet. This method analyzes a transition of shape information from signal in detail since this method keeps property of shift invariance though information of decomposition includes redundancy. Local pattern spectrum which corresponds to nonlinear short time Fourier transform is derived from this non- linear wavelet. The characteristics of these methods were confirmed by applying to sleep data. © 2013 ISSN 1881-803X.

关键词： Mathematical morphology

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A model-based approach in VEP-based brain-computer interface

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ICIC Express Letters 2013年第4期7卷 1393-1400页

作者： Mizoguchi, Takashi Irie, Jun Inoue, Katsuhiro Department of Systems Design and Informatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-shi Fukuoka 820-8502 Japan

Recently a lot of researchers have studied brain-computer interface (BCI) systems and several applications have already been put into practical use. For instance, P300-based systems have been actively used. However, the electroencephalogram (EEG) signal is often very noisy, which makes the P300 detection difficult in a single trial. Therefore, it is necessary to introduce some information from the EEG signal. In this contribution, we propose a model-based analysis using a model of visual evoked potentials (VEPs), which is estimated by the maximum a posteriori probability (MAP) algorithm. Simulation shows that this method is a promising approach to extract information related to the presence or absence of a visual stimulus. © 2013 ICIC International.

关键词： Brain computer interface

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Fabrication of 1 T Bi-2223 superconducting magnet with 92 mm bore diameter at 77 K

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AIP Conference Proceedings 2014年第1期1573卷 754-759页

作者： Edmund S. Otabe Vladimir S. Vyatkin Masaru Kiuchi Teruo Matsushita Baorong Ni Takeshi Kato Takashi Nishimura Ryota Uetsuki Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Department of Electronic Engineering Fukuoka Institute of Technology 3-30-1 Wajirohigashi Higashi-ku Fukuoka 811-0295 Japan Sumitomo Electric Industries Ltd. 1-1-3 Shimaya Konohana-ku Osaka 554-0024 Japan

A Bi-2223 superconducting magnet for practical use in liquid nitrogen is designed and fabricated. Bi-2223 tapes prepared by ConTrolled Over Pressure (CT-OP) process are used for the winding, and the critical current at 77.3 K and self-field is in the range of 174–185 A. 28 double-pancake coils are resistively connected in series by copper terminals. High critical current tape is used for top and bottom double-pancake coils, since the magnetic field normal to the tape surface is highest at the top and bottom of the magnet. Two iron plates at top and bottom of the magnet are used for reduction of the normal component of magnetic field to the Bi-2223 tape, since the total performance of the magnet is determined by the minimum critical current at maximum normal magnetic field component to the tape. The inner bore diameter of the magnet is 92 mm. And the homogeneity of magnetic field of long-axis direction in 50 mmφ × 100 mm length is within 3%. The maximum magnetic field at the center of the bore is over 1.0 T at 77.3 K.

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Development of Learning Methods and System to Practice Problems Using Digital Materials

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Procedia computer science 2014年 35卷 1247-1254页

作者： Kazuya Suzuki Hideki Kondo Shin’nosuke Yamaguchi Yoshimasa Ohnishi Shin’ichi Tsumori Hirotaka Wakana Kazunori Nishino Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Kyushu Junior College of Kinki University 1-5-30 Komoda-Higashi Iizuka Fukuoka 820-8513 Japan Center for Educational Innovation Nagasaki University 1-14 Bunkyo-machi Nagasaki City Nagasaki 852-8521 Japan

In recent years, digital learning materials have been incorporated into schools by the spread of Information and Communication Technology (ICT). In this paper, we propose learning methods to develop the expressive power, decision making and thinking skills of students using digital materials. Additionally, we develop the following features: a method that can show the data created in ePub as the digital learning materials, a feature that can search the Internet directly by linking with an Internet browser, and a feature that saves the meta-data for the learner using e-learning to reuse the data that was developed for smartphone users.

关键词： digital learning material e-learning ePub learning method

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Current-carrying capacity of HTS DC cables with the reduced Lorentz force

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Journal of Physics: Conference Series 2014年第2期507卷

作者： V S Vyatkin K Tanabe E S Otabe M Kiuchi T Matsushita Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan

The structure of superconducting DC cable made with high temperature superconducting tapes is designed to improve the current-carrying capacity by reducing the Lorentz force acting on flux lines. For this purpose an axial magnetic field is produced by the outer shield conductor. The analysis was performed for the optimum structure for various superconducting tapes with different Jc(B,θ) characteristics. It is found that the current-carrying capacity increases appreciably when the difference in the critical current density of the tape is large enough between normal and parallel magnetic fields.

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11th German Conference on Chemoinformatics (GCC 2015) Abstracts

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JOURNAL OF CHEMINFORMATICS 2016年第SUPPL 1期8卷 1-27页

作者： [Anonymous] GDCh-CIC Division Associated Board Member Beilstein-Institut zur Förderung der Chemischen Wissenschaften Trakehner Str. 7-9 60487 Frankfurt Germany. ufechner@beilstein-institut.de. Division Medicinal Chemistry Amsterdam Institute for Molecules Medicines and Systems (AIMMS) VU University Amsterdam The Netherlands. Centre for Bioinformatics Uni Hamburg Bundesstr. 43 20146 Hamburg Germany. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. stefan.guessregen@***. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. GlaxoSmithKline Stevenage SG1 2NY UK. nicola.j.richmond@***. Discngine Paris 75011 France. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. marwin.segler@wwu.de. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. Bundeskriminalamt Wiesbaden Central Analytics II 65173 Wiesbaden Germany. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. shea@chem.ucsb.edu. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. Chemistry Department Ludwig-Maximilians-Universität München Butenandtstr. 7 81377 Munich Germany. Inorganic Chemistry and Center for Nanointegration University of Duisburg-Essen Essen Germany. CAM-D Technologies Essen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. achim.zielesny@w-hs.de. Leiden University Leiden Netherlands. j.fraaije@chem.leidenuniv.nl. Culgi BV Berlin Germany. Physikalische Chemie III TU Dortmund 44227 Dortmund Germany. stefan.kast@tu-dortmund.de. Centre for Molecular Informatics Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom. kcb27@cam.ac.uk. Centre for Molecular Informatics Department of Chemistry

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Development of virtual electron microscopy to supply unified user interface

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Microscopy (Oxford, England) 2014年第SUPPL_1期63 Suppl 1卷 i31页

作者： Iwasaki Ayaka Takuo Yasunaga Takahiro Tsuruta Maiko Murakami Dept. of Bioscience and Bioinformatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology. Dept. of Bioscience and Bioinformatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology JST SENTAN 680-4 Kawazu Iizuka Fukuoka Japan.

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A model and simulation of EV use in environments with V2H and battery replacement infrastructure 20

A model and simulation of EV use in environments with V2H an...

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20th Intelligent Transport systems World Congress, ITS 2013

作者： Zhanikeev, Marat Watanabe, Hitoshi Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-shi Fukuoka-ken820-8502 Japan Faculty of Engineering Tokyo University of Science 1-3 Kagurazaka Shinjuku-ku Tokyo162-8601 Japan

This paper proposes a model for city-scale EV infrastructures. Recent advances both in EV battery technology and alternative battery ownership formulations have created favorable conditions for houses where EVs are used not only for commuting but also as one of the main power supplies. Power supplied by EVs is a natural complement for solar panels, where the former is the only choice at night when solar panels cannot function by definition. The proposed model is based on a system of practical considerations with the main objective to build simulations as close to reality as possible. The model is applicable to a wide range of simulations including EV infrastructures, distributed power microgrids, smart cities, etc.

关键词： Solar panels

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Cell observation method under near-living conditions by scanning electron microscopy

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Microscopy (Oxford, England) 2014年第SUPPL_1期63 Suppl 1卷 i31页

作者： Misaki Tanaka Kazuyuki Matsushima Kuniyoshi Kaseda Takuo Yasunaga Dept. of Bioscience and Bioinformatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka Japan. Dept. of Bioscience and Bioinformatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka Japan Saravio Cosmetics Ltd 1356-6 Oazatsurumi minoyashiki Beppu Oita. Saravio Cosmetics Ltd 1356-6 Oazatsurumi minoyashiki Beppu Oita. Dept. of Bioscience and Bioinformatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka Japan JST SENTAN.

Most cells of multicellular organisms have "primary cilia", which are single, non-motile, and sensory cilia. They have been reported to detect mechanical stimulation and transform it into internal cell, but the mechanisms are not still well known. Dermal papilla (DP) cells, which locate in the skin and regulate hair follicle development and hair cycle, were reported to have their primary cilia by immune-fluorescent method [1], but their detailed structure and function is *** observation by scanning electron microscopy (SEM), biological specimens are conventionally fixed with glutaraldehyde and dehydrated in 30%, 50%, 70%, 90% and 100% ethanol. Then specimens are dried by butyl alcohol and coated with gold. It takes several days to prepare these specimens. Using many chemical reagent and many steps in this way may lead to destroy biological specimens structure. Here we attempted a recently proposed method using ionic liquid to prepare cell samples in near- living conditions observed the structure of DP cells (2D and clumps) with primary *** time, we used ionic liquid for preparing specimens. First, cultured cells were fixed in glutaraldehyde, and immersed in ionic liquid. Next, the specimens were coated with gold and observed by SEM. Thus, it takes shorter time due to fewer step than conventional method and the process has no drying step. In a conventional way, we got the micrographs of 2D cultured DP cells and observed the cilium of DP cells (200-nm in diameter and 1.5um in length) on nucleus (15-um). In addition we could observe the clumps of DP cells and the cilia-like structure (∼12-um), but they do not attach to scaffoldings of the surface, probably due to drying. In observation using ionic liquid, we got the micrographs of 2D cultured DP cells and observed the cilium- like structure (200-nm in diameter and 2.1-um in length) on nucleus (30-um), as well. In this case, we could not find the cilia- like structure in the clumps of DP cells yet, but th

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