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117 results on '"Ishibashi, Kazuya"'

1. Flip motion of solitary wave in an Ising-type Vicsek model

Author

Sakaguchi, Hidetsugu and Ishibashi, Kazuya

Subjects
Nonlinear Sciences - Pattern Formation and Solitons, Condensed Matter - Soft Condensed Matter, Nonlinear Sciences - Adaptation and Self-Organizing Systems
Abstract

An Ising-type Vicsek model is proposed for collective motion and sudden direction change in a population of self-propelled particles. Particles move on a linear lattice with velocity +1 or -1 in the one-dimensional model. The probability of the velocity of a particle at the next step is determined by the number difference of the right- and left- moving particles at the present lattice site and its nearest-neighboring sites. A solitary wave appears also in our model similarly to previous models. In some parameter range, the moving direction of the solitary wave sometimes changes rather suddenly, which is like the sudden change of moving direction of a flock of birds. We study the average reversal time of traveling direction numerically and compare the results with a mean-field theory. The one-dimensional model is generalized to a two-dimensional model. Flip motion of a bandlike soliton is observed in the two-dimensional model., Comment: 9 pages, 9 figures

Published
2019
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2. One- and Two-dimensional Solitary Wave States in the Nonlinear Kramers Equation with Movement Direction as a Variable

Author

Sakaguchi, Hidetsugu and Ishibashi, Kazuya

Subjects
Condensed Matter - Statistical Mechanics, Condensed Matter - Soft Condensed Matter, Nonlinear Sciences - Pattern Formation and Solitons
Abstract

We study self-propelled particles by direct numerical simulation of the nonlinear Kramers equation for self-propelled particles. In our previous paper, we studied self-propelled particles with velocity variables in one dimension. In this paper, we consider another model in which each particle exhibits directional motion. The movement direction is expressed with a variable $\phi$. We show that one-dimensional solitary wave states appear in direct numerical simulations of the nonlinear Kramers equation in one- and two-dimensional systems, which is a generalization of our previous result. Furthermore, we find two-dimensionally localized states in the case that each self-propelled particle exhibits rotational motion. The center of mass of the two-dimensionally localized state exhibits circular motion, which implies collective rotating motion. Finally, we consider a simple one-dimensional model equation to qualitatively understand the formation of the solitary wave state., Comment: 9 pages, 8 figures

Published
2018
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3. Solitary wave state in the nonlinear Kramers equation for self-propelled particles

Author

Sakaguchi, Hidetsugu and Ishibashi, Kazuya

Subjects
Condensed Matter - Statistical Mechanics, Condensed Matter - Soft Condensed Matter, Nonlinear Sciences - Pattern Formation and Solitons
Abstract

We study collective phenomena of self-propagating particles using the nonlinear Kramers equation. A solitary wave state appears from an instability of the spatially uniform ordered state with nonzero average velocity. Two solitary waves with different heights merge into a larger solitary wave. An approximate solution of the solitary wave is constructed using a self-consistent method. The phase transition to the solitary wave state is either first-order or second-order, depending on the control parameters., Comment: 7 pages, 5 figures

Published
2017
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5. Sparse and Dense Encoding in Layered Associative Network of Spiking Neurons

Author

Ishibashi, Kazuya, Hamaguchi, Kosuke, and Okada, Masato

Subjects
Quantitative Biology - Neurons and Cognition
Abstract

A synfire chain is a simple neural network model which can propagate stable synchronous spikes called a pulse packet and widely researched. However how synfire chains coexist in one network remains to be elucidated. We have studied the activity of a layered associative network of Leaky Integrate-and-Fire neurons in which connection we embed memory patterns by the Hebbian Learning. We analyzed their activity by the Fokker-Planck method. In our previous report, when a half of neurons belongs to each memory pattern (memory pattern rate $F=0.5$), the temporal profiles of the network activity is split into temporally clustered groups called sublattices under certain input conditions. In this study, we show that when the network is sparsely connected ($F<0.5$), synchronous firings of the memory pattern are promoted. On the contrary, the densely connected network ($F>0.5$) inhibit synchronous firings. The sparseness and denseness also effect the basin of attraction and the storage capacity of the embedded memory patterns. We show that the sparsely(densely) connected networks enlarge(shrink) the basion of attraction and increase(decrease) the storage capacity.

Published
2007
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6. Theory of Interaction of Memory Patterns in Layered Associative Networks

Author

Ishibashi, Kazuya, Hamaguchi, Kosuke, and Okada, Masato

Subjects
Quantitative Biology - Neurons and Cognition
Abstract

A synfire chain is a network that can generate repeated spike patterns with millisecond precision. Although synfire chains with only one activity propagation mode have been intensively analyzed with several neuron models, those with several stable propagation modes have not been thoroughly investigated. By using the leaky integrate-and-fire neuron model, we constructed a layered associative network embedded with memory patterns. We analyzed the network dynamics with the Fokker-Planck equation. First, we addressed the stability of one memory pattern as a propagating spike volley. We showed that memory patterns propagate as pulse packets. Second, we investigated the activity when we activated two different memory patterns. Simultaneous activation of two memory patterns with the same strength led the propagating pattern to a mixed state. In contrast, when the activations had different strengths, the pulse packet converged to a two-peak state. Finally, we studied the effect of the preceding pulse packet on the following pulse packet. The following pulse packet was modified from its original activated memory pattern, and it converged to a two-peak state, mixed state or non-spike state depending on the time interval.

Published
2006
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7. Features and Outcomes of Histologically Proven Myocarditis With Fulminant Presentation

Author

Kanaoka, Koshiro, primary, Onoue, Kenji, additional, Terasaki, Satoshi, additional, Nakano, Tomoya, additional, Nakai, Michikazu, additional, Sumita, Yoko, additional, Hatakeyama, Kinta, additional, Terasaki, Fumio, additional, Kawakami, Rika, additional, Iwanaga, Yoshitaka, additional, Miyamoto, Yoshihiro, additional, Saito, Yoshihiko, additional, Yuda, Satoshi, additional, Tanno, Masaya, additional, Takahashi, Toru, additional, Yokoshiki, Hisashi, additional, Toba, Masahiro, additional, Anzai, Toshihisa, additional, Nagai, Toshiyuki, additional, Sato, Takuma, additional, Takenaka, Takashi, additional, Yamazaki, Seiji, additional, Katagiri, Yuki, additional, Takeuchi, Toshiharu, additional, Sugitatsu, Kazuya, additional, Kakinoki, Shigeo, additional, Matsumoto, Tomoaki, additional, Urasawa, Kazushi, additional, Tan, Michinao, additional, Tsujino, Ichizo, additional, Kamigaki, Mitsunori, additional, Tomita, Hirofumi, additional, Hanada, Kenji, additional, Kushibiki, Motoi, additional, Nakamura, Akihiro, additional, Morino, Yoshihiro, additional, Nasu, Takahito, additional, Yasuda, Satoshi, additional, Suzuki, Hideaki, additional, Iwabuchi, Kaoru, additional, Tsuji, Kanako, additional, Namiuchi, Shigeto, additional, Komaru, Tatsuya, additional, Yagi, Masahiro, additional, Uematsu, Shoko, additional, Takahashi, Toshiaki, additional, Takeda, Satoru, additional, Nakanishi, Toru, additional, Watanabe, Masafumi, additional, Wanezaki, Masahiro, additional, Matsui, Motoyuki, additional, Sugawara, Shigeo, additional, Takeishi, Yasuchika, additional, Oikawa, Masayoshi, additional, Komatsu, Nobuo, additional, Suzuki, Satoshi, additional, Okamoto, Hiroshi, additional, Takeyasu, Noriyuki, additional, Akiyama, Daiki, additional, Eki, Yutaka, additional, Kakuta, Tsunekazu, additional, Sugiyama, Tomoyo, additional, Koizumi, Tomomi, additional, Ueno, Koji, additional, Kario, Kazuomi, additional, Taki, Mizuri, additional, Matsumoto, Yuri, additional, Yasu, Takanori, additional, Nishioka, Osamu, additional, Naito, Shigeto, additional, Murata, Makoto, additional, Tange, Shoichi, additional, Kaneko, Katsumi, additional, Muto, Makoto, additional, Inagaki, Hiroshi, additional, Hasegawa, Shuichi, additional, Tachibana, Eizo, additional, Atsumi, Wataru, additional, Suzuki, Masahiro, additional, Muramatsu, Toshihiro, additional, Yamada, Yoshihiro, additional, Taguchi, Isao, additional, Fukuda, Yoshiaki, additional, Matsui, Akihiro, additional, Kanda, Junji, additional, Hozawa, Koji, additional, Matsumura, Akihiko, additional, Shimizu, Wataru, additional, Yamamoto, Takeshi, additional, Komuro, Issei, additional, Hatano, Masaru, additional, Ikeda, Takanori, additional, Kiuchi, Shunsuke, additional, Chikamori, Taishiro, additional, Takei, Yasuyoshi, additional, Soejima, Kyoko, additional, Minamishima, Toshinori, additional, Tanaka, Hiroyuki, additional, Shimizu, Shigeo, additional, Kasao, Masashi, additional, Kadohira, Tadayuki, additional, Minamino, Tohru, additional, Shimada, Kazunori, additional, Iwata, Hiroshi, additional, Momiyama, Yukihiko, additional, Ashikaga, Takashi, additional, Nozato, Toshihiro, additional, Fujiwara, Yasumasa, additional, Inoue, Kenji, additional, Sasano, Tetsuo, additional, Matsuda, Junji, additional, Ishii, Yasuhiro, additional, Ono, Yuichi, additional, Tanabe, Kengo, additional, Horiuchi, Yu, additional, Shinke, Toshiro, additional, Kodama, Yusuke, additional, Moroi, Masao, additional, Yazaki, Yoshiyuki, additional, Mizumura, Taisuke, additional, Ohta, Hiroshi, additional, Akashi, Yoshihiro, additional, Kotoku, Nozomi, additional, Ikari, Yuji, additional, Maruyama, Mitsunori, additional, Sato, Yasuhiro, additional, Tamura, Koichi, additional, Konishi, Masaaki, additional, Suzuki, Hiroshi, additional, Ebato, Mio, additional, Fukui, Kazuki, additional, Yumoto, Kazuhiko, additional, Iwasawa, Takamasa, additional, Kashimura, Takeshi, additional, Takahashi, Kazuyoshi, additional, Okada, Yoshinobu, additional, Kaku, Bunji, additional, Usuda, Kazuo, additional, Maruyama, Michiro, additional, Kameyama, Tomoki, additional, Higashikata, Toshinori, additional, Hodatsu, Akihiko, additional, Osato, Kazuo, additional, Nagata, Yoji, additional, Maeno, Koji, additional, Satake, Kazuo, additional, Sawanobori, Takao, additional, Watanabe, Noboru, additional, Kuwahara, Koichiro, additional, Motoki, Hirohiko, additional, Kitabayashi, Hiroshi, additional, Otagiri, Kyuhachi, additional, Kono, Tsunesuke, additional, Yamagishi, Daisuke, additional, Yazaki, Yoshikazu, additional, Noda, Toshiyuki, additional, Morishima, Itsuro, additional, Watanabe, Naoki, additional, Tanaka, Shinichiro, additional, Onodera, Tomoya, additional, Nawada, Ryuzo, additional, Watanabe, Akinori, additional, Matsunaga, Masaki, additional, Suwa, Satoru, additional, Sakamoto, Hiroshi, additional, Sakamoto, Hiroki, additional, Aoyama, Takeshi, additional, Kanamori, Norio, additional, Muto, Masahiro, additional, Maekawa, Yuichiro, additional, Ohtani, Hayato, additional, Ozaki, Yukio, additional, Naruse, Kenshin, additional, Takemoto, Kenji, additional, Kamiya, Haruo, additional, Suzuki, Takeshi, additional, Tomita, Yasushi, additional, Suzuki, Susumu, additional, Kametani, Ryosuke, additional, Aoyama, Hidekazu, additional, Osanai, Hiroyuki, additional, Harada, Ken, additional, Kada, Kenji, additional, Saeki, Tomoaki, additional, Kobayashi, Koichi, additional, Ogawa, Yasuhiro, additional, Terasawa, Akihiro, additional, Shinoda, Masanori, additional, Oguri, Mitsutoshi, additional, Shimizu, Kiyokazu, additional, Sawamura, Akinori, additional, Sugiura, Atsushi, additional, Hattori, Kosuke, additional, Mokuno, Shinji, additional, Kondo, Kazuhisa, additional, Dohi, Kaoru, additional, Moriwaki, Keishi, additional, Kasai, Atsunobu, additional, Nakakuki, Tetsuya, additional, Kaitani, Kazuaki, additional, Jinnai, Toshikazu, additional, Yamamoto, Takashi, additional, Kurata, Hiroyuki, additional, Wada, Atsuyuki, additional, Akao, Masaharu, additional, Hamatani, Yasuhiro, additional, Ishibashi, Kazuya, additional, Akakabe, Yoshiki, additional, Asaumi, Yasuhide, additional, Matama, Hideo, additional, Sakata, Yasushi, additional, Kioka, Hidetaka, additional, Takaishi, Hiroshi, additional, Takase, Toru, additional, Matsuda, Mitsuo, additional, Sato, Fumi, additional, Hasegawa, Shinji, additional, Ishigami, Kenichi, additional, Ichikawa, Minoru, additional, Takagi, Takashi, additional, Inoko, Moriaki, additional, Hoshiga, Masaaki, additional, Fujita, Shuichi, additional, Takeda, Yoshihiro, additional, Kawarabayashi, Takahiko, additional, Takaoka, Hideyuki, additional, Nakajima, Kenji, additional, Yuguchi, Tadashi, additional, Kawasaki, Tatsuya, additional, Shinoda, Yukinori, additional, Sato, Yukihito, additional, Ishihara, Masaharu, additional, Matsumoto, Yuki, additional, Kawai, Hiroya, additional, Takaya, Tomofumi, additional, Matsuo, Kouki, additional, Mano, Toshiaki, additional, Hirata, Kenichi, additional, Hisamatsu, Eriko, additional, Inoue, Nobutaka, additional, Tamita, Koichi, additional, Mukohara, Naoki, additional, Shimoyama, Hisashi, additional, Miyajima, Toru, additional, Tamura, Toshihiro, additional, Tamaki, Yodo, additional, Suzuki, Megumi, additional, Yokota, Ryoji, additional, Horii, Manabu, additional, Yamanaka, Kazuo, additional, Kawata, Hiroyuki, additional, Hashimoto, Yukihiro, additional, Nakada, Yasuki, additional, Nakagawa, Hitoshi, additional, Ueda, Tomoya, additional, Nishida, Taku, additional, Seno, Ayako, additional, Watanabe, Makoto, additional, Akasaka, Takashi, additional, Tanimoto, Takashi, additional, Toyofuku, Mamoru, additional, Yamamoto, Kazuhiro, additional, Kinugasa, Yoshiharu, additional, Hirai, Masayuki, additional, Nasu, Hiroshi, additional, Shirota, Kinya, additional, Oda, Tsuyoshi, additional, Oka, Takefumi, additional, Kadota, Kazushige, additional, Ohya, Masanobu, additional, Ito, Hiroshi, additional, Nakamura, Kazufumi, additional, Ogura, Soichiro, additional, Fuke, Soichiro, additional, Uemura, Shiro, additional, Matsubara, Hiromi, additional, Watanabe, Atsuyuki, additional, Morishima, Nobuyuki, additional, Kihara, Yasuki, additional, Hidaka, Takayuki, additional, Ueda, Hironori, additional, Ono, Yujiro, additional, Muraoka, Yuji, additional, Hatanari, Miyo, additional, Miyamoto, Yoshinori, additional, Dote, Keigo, additional, Kato, Masaya, additional, Yano, Masafumi, additional, Mochizuki, Mamoru, additional, Ikeda, Yasuhiro, additional, Fujinaga, Hiroyuki, additional, Hosokawa, Shinobu, additional, Sata, Masataka, additional, Yamaguchi, Koji, additional, Aki, Naoko, additional, Minamino, Tetsuo, additional, Miyake, Yuichi, additional, Takagi, Yuichiro, additional, Doi, Masayuki, additional, Taketani, Yoshio, additional, Okayama, Hideki, additional, Shigematsu, Tatsuya, additional, Higaki, Akinori, additional, Yamaguchi, Osamu, additional, Inaba, Shinji, additional, Ikeda, Shuntaro, additional, Kawai, Kazuya, additional, Kitaoka, Hiroaki, additional, Kubo, Toru, additional, Ando, Kenji, additional, Inui, Kaoru, additional, Fukumoto, Yoshihiro, additional, Hori, Kensuke, additional, Homma, Takehiro, additional, Kawasaki, Tomohiro, additional, Mohri, Masahiro, additional, Fujiwara, Masaki, additional, Tsutsui, Hiroyuki, additional, Ide, Tomomi, additional, Miura, Shin-Ichiro, additional, Kuwano, Takashi, additional, Shimomura, Hideki, additional, Kadokami, Toshiaki, additional, Taba, Masanao, additional, Kondou, Katsuhiro, additional, Kubota, Toru, additional, Nagatomo, Daisuke, additional, Mukai, Yasushi, additional, Matsukawa, Ryuichi, additional, Tashiro, Hideki, additional, Shimomura, Mitsuhiro, additional, Maemura, Koji, additional, Kawano, Hiroaki, additional, Oku, Koji, additional, Yamasa, Toshihiko, additional, Kizaki, Yoshihisa, additional, Sakamoto, Tomohiro, additional, Tamura, Yudai, additional, Ito, Teruhiko, additional, Fujimoto, Kazuteru, additional, Tsujita, Kenichi, additional, Takashio, Seiji, additional, Kurokawa, Hirofumi, additional, Takahashi, Naohiko, additional, Saito, Shotaro, additional, Arikawa, Masaya, additional, Shibata, Yoshisato, additional, Nishihira, Kensaku, additional, Tsuruda, Toshihiro, additional, Sonoda, Masahiro, additional, Atsuchi, Nobuhiko, additional, Ohishi, Mitsuru, additional, Higuchi, Koji, additional, Miyata, Masaaki, additional, Oketani, Naoya, additional, Akimoto, Yoshinori, additional, Asahi, Tomohiro, additional, and Wake, Minoru, additional

Published
2022
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13. A REPORT ON THE INFORMATION SUPPORT ACTIVITIES USING GIS IN VOLUNTEER CENTER OF AREAS STRICKEN BY THE HEAVY RAIN EVENT OF JULY 2018

Author

TAMURA, Shota, primary, YOKOYAMA, Makoto, additional, OTA, Shuhei, additional, YAGI, Hisanori, additional, YAMADA, Aoi, additional, ISHIBASHI, Kazuya, additional, OKADA, Ryosuke, additional, KANAI, Remon, additional, TANAKA, Kenta, additional, AKAMATSU, Izumi, additional, ISHIBASHI, Ami, additional, ORYOJI, Taiki, additional, HONDA, Machiko, additional, and TANAKA, Takahiro, additional

Published
2019
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16. Ankylosis of Nonresorbable Hydroxyapatite Graft Material as a Contributing Factor in Recurrent Periodontitis.

Author

Yoshinuma, Naoto, Sato, Shuichi, Fukuyama, Tomihisa, Ishibashi, Kazuya, Murai, Masakazu, and Ito, Koichi

Subjects
BONE surgery, ANKYLOSIS, CASE studies, TOOTH root diseases, PERIODONTITIS, TRANSPLANTATION of organs, tissues, etc., EQUIPMENT & supplies, DISEASE risk factors, PREVENTION
Abstract

Many studies have shown that alloplastic bone grafts are clinically stable and safe. Nevertheless, postoperative problems such as ankylosis and root resorption are associated with alloplastic bone grafts. This report examined two cases of ankylosis of nonresorbable hydroxyapatite (NHA) alloplastic grafts associated with recurrent periodontitis. There was no clear border between the NHA particles and dentin. The particles were irregularly shaped and had plaque on the surfaces. It is postulated that ankylosis of NHA particles and dentin is a contributing factor in recurrent periodontitis. [ABSTRACT FROM AUTHOR]

Published
2012

18. Inhibitory effects of low-energy pulsed ultrasonic stimulation on cell surface protein antigen C through heat shock proteins GroEL and DnaK in streptococcus mutans

Author

Ishibashi, Kazuya, Shimada, Koichi, Kawato, Takayuki, Kaji, Shigejyu, Maeno, Masao, Sato, Shuichi, and Ito, Koichi

Subjects
Cell adhesion -- Analysis, Gene expression -- Analysis, Gene mutations -- Analysis, Heat shock proteins -- Chemical properties, Heat shock proteins -- Environmental aspects, Streptococcus -- Genetic aspects, Streptococcus -- Physiological aspects, Ultrasonic waves -- Usage, Biological sciences
Abstract

The antibacterial and bactericidal effects of low-energy pulsed ultrasound on mutans streptococci and its inhibitory effects on bacterial cell adhesion of Streptococcus mutans are examined along with expression of stress response heat shock proteins GroEL and DnaK. The low-energy pulsed ultrasound has decreased bacterial adhesion by the inhibitory effect on the cell surface protein antigen C (PAc) protein and heat shock protein expression and is useful as photodynamic antimicrobial chemotherapy in controlling dental plaque.

Published
2010

22. Observation of magnetization alignment switching in Fe3Si/FeSi2artificial lattices by polarized neutron reflection

Author

Noda Yūta, Yoshitake Tsuyoshi, Takeda Masayasu, < Ken-ichiro Sakai, Ishibashi Kazuya, Takeda Kaoru, and Asai Yūki

Subjects
Physics, Magnetization, Optics, business.industry, Neutron, Information systems engineering, business, Engineering physics
Abstract

Ken-ichiro Sakai*, Yūki Asai, Masayasu Takeda, Kazuya Ishibashi, Yūta Noda, Kaoru Takeda, and Tsuyoshi Yoshitake* 1Department of Applied Science for Electronics and Materials, Kyushu University, Kasuga, Fukuoka 816-8580, Japan 2Department of Control and Information Systems Engineering, Kurume National College of Technology, Kurume, Fukuoka 830-8555, Japan 3Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 3191195, Japan 4Department of Electrical Engineering, Fukuoka Institute of Technology, Fukuoka 8110295, Japan

Published
2015

29. Long-term follow-up of 'reversible' dilated cardiomyopathy with improvement of cardiac sympathetic nerve activity after cardiac resynchronization therapy (CRT): Do 'CRT superresponders' have 'dyssynchrony-induced cardiomyopathy'?

Author

Ishibashi, Kazuya, Osamura, Tomoko, Shiraishi, Hirokazu, Shirayama, Takeshi, Yamahara, Yasuhiro, and Matsubara, Hiroaki

Subjects
Cardiac resynchronization therapy, 123I-metaiodobenzylguanidine, Dilated cardiomyopathy, cardiovascular system, Carvedilol, Beta-blocker, Superresponder, Article
Abstract

SummaryWe report a case of idiopathic dilated cardiomyopathy with severe heart failure and complete left bundle branch block (CLBBB) which exhibited an excellent response to cardiac resynchronization therapy (CRT). A 71-year-old male had been treated for 9 years with medication for chronic heart failure. He was referred to hospital with a complaint of dyspnea. An electrocardiogram showed CLBBB, with a QRS-width of 200ms. Markedly dilated left ventricular (LV) chamber with a low ejection fraction (EF) of 18% and severe mitral regurgitation were registered by echocardiogram. Myocardial neuronal 123I-metaiodobenzylguanidine uptake was reduced, with a heart-to-mediastinum (H/M) ratio of 1.88. Immediately after the introduction of CRT, clinical improvement was observed. At 1-year follow-up, LV chamber size and cardiac function were almost normalized, with an EF of 53%. Cardiac sympathetic nerve activity (CSNA) was simultaneously normalized, with an H/M ratio of 2.32 and a washout rate of 14.7%. However, after the cessation of carvedilol administration, CSNA and LV systolic function were slightly aggravated, with an H/M ratio of 2.20, a washout rate of 15.9%, and an EF of 44%. In the present case, the excellent improvement in cardiac function and CSNA was caused by the combined effects of beta-blocker therapy and CRT.

Published
2009

33. 点図触地図自動作成システムにおける点格子模様の識別性の評価

Author

渡辺, 哲也, 渡部, 謙, 山口, 俊光, 南谷, 和範, 大内, 進, 高岡, 裕, 喜多, 伸一, 石橋, 和也, Watanabe, Tetsuya, Watanabe, Ken, Yamaguchi, Toshimitsu, Minatani, Kazunori, Oouchi, Susumu, Takaoka, Yutaka, Kita, Shinichi, Ishibashi, Kazuya, 渡辺, 哲也, 渡部, 謙, 山口, 俊光, 南谷, 和範, 大内, 進, 高岡, 裕, 喜多, 伸一, 石橋, 和也, Watanabe, Tetsuya, Watanabe, Ken, Yamaguchi, Toshimitsu, Minatani, Kazunori, Oouchi, Susumu, Takaoka, Yutaka, Kita, Shinichi, and Ishibashi, Kazuya

Abstract

点図において識別性が高い面記号の組合せを見つけるため，晴眼者と視覚障害者を対象に実験を行った．実験では，点種と点間隔が異なる10種類の点格子模様を刺激とし，一対比較により，その触感の違いと識別時間を記録した．その結果，晴眼者の場合，点の大きさが等しい場合は点間隔の差が2.0 mm以上，点の大きさが異なる場合は1.3 mm以上ある組合せが識別性が高いことが分かった．視覚障害者の場合はそれぞれ1.3 mm以上と0.7 mm以上であった．視覚障害者の識別時間は晴眼者の約半分であった．この結果を用いて，触地図で用いるのに適切な点格子模様の組合せを提案し，この提案の有効性を触地図内小面積面記号の識別実験で実証した.

Published
2013

38. Two Siblings Diagnosed to Have Transthyretin-related Familial Amyloid Cardiomyopathy Around the Same Time at Different Hospitals

Author

Miyamura, Masatoshi, primary, Terasaki, Fumio, additional, Ishibashi, Kazuya, additional, Shimazaki, Chihiro, additional, Kimura, Fumiharu, additional, Kuwabara, Hiroko, additional, Tsuji, Motomu, additional, Shibayama, Yuro, additional, Sekijima, Yoshiki, additional, Tojo, Kana, additional, and Ishizaka, Nobukazu, additional

Published
2012
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45. Japanese Journal of Electrocardiology

Author

Ariyoshi, Makoto, primary, Ishibashi, Kazuya, additional, Osamura, Tomoko, additional, Kuroyanagi, Akira, additional, Yamahara, Yasuhiro, additional, and Matsubara, Hiroaki, additional

Published
2007
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