1
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Morita T, Kojima T, Matsuo S, Matsukiyo S, Isayama S, Yamazaki R, Tanaka SJ, Aihara K, Sato Y, Shiota J, Pan Y, Tomita K, Takezaki T, Kuramitsu Y, Sakai K, Egashira S, Ishihara H, Kuramoto O, Matsumoto Y, Maeda K, Sakawa Y. Detection of current-sheet and bipolar ion flows in a self-generated antiparallel magnetic field of laser-produced plasmas for magnetic reconnection research. Phys Rev E 2022; 106:055207. [PMID: 36559487 DOI: 10.1103/physreve.106.055207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 09/23/2022] [Indexed: 06/17/2023]
Abstract
Magnetic reconnection in laser-produced magnetized plasma is investigated by using optical diagnostics. The magnetic field is generated via the Biermann battery effect, and the inversely directed magnetic field lines interact with each other. It is shown by self-emission measurement that two colliding plasmas stagnate on a midplane, forming two planar dense regions, and that they interact later in time. Laser Thomson scattering spectra are distorted in the direction of the self-generated magnetic field, indicating asymmetric ion velocity distribution and plasma acceleration. In addition, the spectra perpendicular to the magnetic field show different peak intensity, suggesting an electron current formation. These results are interpreted as magnetic field dissipation, reconnection, and outflow acceleration. Two-directional laser Thomson scattering is, as discussed here, a powerful tool for the investigation of microphysics in the reconnection region.
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Affiliation(s)
- T Morita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - T Kojima
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - S Matsuo
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - S Matsukiyo
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- International Research Center for Space and Planetary Environmental Science, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - S Isayama
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - R Yamazaki
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S J Tanaka
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - K Aihara
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - Y Sato
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - J Shiota
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - Y Pan
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - K Tomita
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - T Takezaki
- Faculty of Engineering, University of Toyama, Gofuku 3190, Toyama-shi, Toyama 930-8555, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - K Sakai
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S Egashira
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - H Ishihara
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - O Kuramoto
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - Y Matsumoto
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - K Maeda
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
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2
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Aihara K, Torii S, Nakamura N, Nakazawa G, Ikari Y. Pathological analysis of struts coverage after second- and third-generation drug-eluting stents implantation for duration of dual anti-platelets therapy; an autopsy study. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Strut coverage of drug-eluting stents (DES) is one of the important factors for the duration of dual anti-platelets therapy (DAPT) after percutaneous coronary intervention. Several studies have reported percent coverage of struts assessed by optical coherence tomography (OCT), however, the timing of endothelial coverage of the latest second- and third-generation DES has not been revealed histologically.
Methods and results
From CVHills stent autopsy registry of 171 stented lesions, a total of 56 lesions from 39 autopsy cases with less than 370 days after second- and/or third-generation DES implantation was evaluated histologically. The lesions were stratified by duration: 1–30 days (n=39), 31–60 days (n=4), 61–90 days (n=5), 91–180 days (n=2), and 181–370 days (n=6), and percent coverage of struts, which was defined as neointimal coverage overlying with endothelial cells, was evaluated for each lesion. In addition, difference of coverage within 90 days after implantation between second-generation DES with circumferentially coated polymer and third-generation DES with abluminally coated polymer was also evaluated.
Percent strut coverage increased with time [1–30 days vs. 31–60 days vs. 61–90 days vs. 91–180 days vs. 181–370 days: median (interquartile range) 0.0% (0.0–0.3), 6.3% (1.0–11.7), 16.7% (8.0–32.6), 64.2% (55.6–72.9), and 86.5% (63.5–92.5), respectively, p<0.0001]. When the coverage at the earlier time point was compared between second- and third-generation DES, prevalence of coverage with >25% per section was higher in third-generation DES and the difference was more obvious in 61–90 days after stent implantation (0.0 vs. 1.0%, p=0.15 in 1–30 days, 7.7 vs. 14.3%, p=0.65 in 31–60 days, and 10.0 vs. 36.3%, p=0.04 in 61–90 days).
Conclusions
The current pathological analysis has demonstrated that the process of endothelial strut coverage in second- and third-generation DES proceeds over time, however, the speed was slower than reported in the previous studies evaluated with OCT. Furthermore, endothelial strut coverage of third-generation DES was faster than that of second-generation DES, suggesting a positive roll of abluminal coating on healthy endothelial coverage and safety de-escalation of DAPT at earlier timepoint.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- K Aihara
- Tokai University School of Medicine , Kanagawa , Japan
| | - S Torii
- Tokai University School of Medicine , Kanagawa , Japan
| | - N Nakamura
- Tokai University School of Medicine , Kanagawa , Japan
| | | | - Y Ikari
- Tokai University School of Medicine , Kanagawa , Japan
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3
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Sakai K, Moritaka T, Morita T, Tomita K, Minami T, Nishimoto T, Egashira S, Ota M, Sakawa Y, Ozaki N, Kodama R, Kojima T, Takezaki T, Yamazaki R, Tanaka SJ, Aihara K, Koenig M, Albertazzi B, Mabey P, Woolsey N, Matsukiyo S, Takabe H, Hoshino M, Kuramitsu Y. Author Correction: Direct observations of pure electron outflow in magnetic reconnection. Sci Rep 2022; 12:16501. [PMID: 36192592 PMCID: PMC9530177 DOI: 10.1038/s41598-022-21220-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- K Sakai
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan. .,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan.
| | - T Moritaka
- Department of Helical Plasma Research, National Institute for Fusion Science, Toki, 509‑5292, Japan
| | - T Morita
- Faculty of Engineering Sciences, Kyushu University, 6‑1 Kasuga‑Koen, Kasuga, Fukuoka, 816‑8580, Japan
| | - K Tomita
- Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita‑ku, Sapporo, Hokkaido, 060‑8628, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - T Nishimoto
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - S Egashira
- Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - M Ota
- Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - N Ozaki
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - R Kodama
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan
| | - T Kojima
- Faculty of Engineering Sciences, Kyushu University, 6‑1 Kasuga‑Koen, Kasuga, Fukuoka, 816‑8580, Japan
| | - T Takezaki
- Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama, 930‑8555, Japan
| | - R Yamazaki
- Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Department of Physical Sciences, Aoyama Gakuin University, 5‑10‑1 Fuchinobe, Sagamihara, Kanagawa, 252‑5258, Japan
| | - S J Tanaka
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan.,Department of Physical Sciences, Aoyama Gakuin University, 5‑10‑1 Fuchinobe, Sagamihara, Kanagawa, 252‑5258, Japan
| | - K Aihara
- Department of Physical Sciences, Aoyama Gakuin University, 5‑10‑1 Fuchinobe, Sagamihara, Kanagawa, 252‑5258, Japan
| | - M Koenig
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau Cedex, France
| | - B Albertazzi
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau Cedex, France
| | - P Mabey
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, 91120, Palaiseau Cedex, France
| | - N Woolsey
- Department of Physics, York Plasma Institute, University of York, York, YO10 5DD, UK
| | - S Matsukiyo
- Faculty of Engineering Sciences, Kyushu University, 6‑1 Kasuga‑Koen, Kasuga, Fukuoka, 816‑8580, Japan
| | - H Takabe
- Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei, 10617, Taiwan
| | - M Hoshino
- Department of Earth and Planetary Science, University of Tokyo, 7‑3‑1 Hongo, Bunkyo, Tokyo, 113‑0033, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2‑1 Yamadaoka, Suita, Osaka, 565‑0871, Japan. .,Institute of Laser Engineering, Osaka University, 2‑6 Yamadaoka, Suita, Osaka, 565‑0871, Japan.
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4
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Nakamura N, Torii S, Aihara K, Kato T, Ikari Y, Nakazawa G. Impact of poor below-the-knee run-off on stent failure of femoro-popliteal arteries in healthy swine model. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Poor below-the-knee (BTK) run-off is reported to be one of the predictors of stent failure after endovascular treatment to femoro-popliteal arteries (1), however, the mechanism of stent failure has never been characterized before. The aim of the current study was to evaluate impact of poor BTK run-off on stent failure in healthy swine femoro-popliteal (FP) lesions, and to compare the outcome of a bare-metal stent (BMS) and two drug-eluting stents (DES) in the arteries with poor BTK run-off.
Method
Fluoropolymer-coated paclitaxel-eluting stents (FP-PES, Eluvia) and BMS were implanted in bilateral femoral arteries of 6 healthy swine following coil embolization in both tibial arteries to induce poor BTK run-off. FP-PES and polymer-free paclitaxel-coated stents (PF-PCS, Zilver-PTX) were also implanted in 6 swine with the same fashion. Angiography with an optical coherence tomography (OCT) at one month followed by histological analysis was performed for each lesion.
Result
Angiography demonstrated that in-stent restenosis was observed exclusively in BMS, and percent stenosis was significantly less in FP-PES compared with BMS (FP-PES vs. BMS, median [interquartile range (IQR)], 17.8% [16.6–28.7] vs. 79.3% [64.2–87.2], respectively, p=0.03). FP-PES also demonstrated significantly less percent stenosis compared with PF-PCS (FP-PES vs. PF-PCS, 8.9% [4.7–44.7] vs. 31.2% [23.3–51.2], respectively, p=0.03). Histopathological evaluation demonstrated that organizing and/or organized fibrin thrombus was the main feature of the restenotic lesions, suggesting a risk of thrombus attachment in the FP lesions with poor BTK run-off. Biologic drug effect such as medial smooth muscle cell (SMC) loss score was significantly greater in FP-PES compared with BMS (4.0 [3.3–4.0] vs. 2.0 [1.0–3.0], respectively, p<0.01), whereas, similar between FP-PES and PF-PCS (4.0 [3.0–4.0] vs. 4.0 [3.0–4.0], respectively, p=0.88).
Conclusion
Thrombus attachment would be the main causes of restenosis in FP lesions with poor BTK runoff. The results of the current study suggest that not only paclitaxel drug effect, but also anti-thrombotic effect of fluoropolymer might be needed to prevent stent failure.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): This study is supported by Boston Scientific.
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Affiliation(s)
- N Nakamura
- Tokai University Hospital , Isehara , Japan
| | - S Torii
- Tokai University Hospital , Isehara , Japan
| | - K Aihara
- Tokai University Hospital , Isehara , Japan
| | - T Kato
- Akita University Graduate School of Medicine, Cardiology , Akita , Japan
| | - Y Ikari
- Tokai University Hospital , Isehara , Japan
| | - G Nakazawa
- Kinki University, Department of Cardiology , Osaka , Japan
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5
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Matsukiyo S, Yamazaki R, Morita T, Tomita K, Kuramitsu Y, Sano T, Tanaka SJ, Takezaki T, Isayama S, Higuchi T, Murakami H, Horie Y, Katsuki N, Hatsuyama R, Edamoto M, Nishioka H, Takagi M, Kojima T, Tomita S, Ishizaka N, Kakuchi S, Sei S, Sugiyama K, Aihara K, Kambayashi S, Ota M, Egashira S, Izumi T, Minami T, Nakagawa Y, Sakai K, Iwamoto M, Ozaki N, Sakawa Y. High-power laser experiment on developing supercritical shock propagating in homogeneously magnetized plasma of ambient gas origin. Phys Rev E 2022; 106:025205. [PMID: 36109929 DOI: 10.1103/physreve.106.025205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 07/24/2022] [Indexed: 06/15/2023]
Abstract
A developing supercritical collisionless shock propagating in a homogeneously magnetized plasma of ambient gas origin having higher uniformity than the previous experiments is formed by using high-power laser experiment. The ambient plasma is not contaminated by the plasma produced in the early time after the laser shot. While the observed developing shock does not have stationary downstream structure, it possesses some characteristics of a magnetized supercritical shock, which are supported by a one-dimensional full particle-in-cell simulation taking the effect of finite time of laser-target interaction into account.
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Affiliation(s)
- S Matsukiyo
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- International Research Center for Space and Planetary Environmental Science, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - R Yamazaki
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Morita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - K Tomita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- Division of Quantum Science and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Sano
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S J Tanaka
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Takezaki
- Faculty of Engineering, University of Toyama, 3190, Gofuku, Toyama 930-8555, Japan
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shii, Kokuraminamiku, Kitakyushu, Fukuoka 802-0985, Japan
| | - S Isayama
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- International Research Center for Space and Planetary Environmental Science, Kyushu University, Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - T Higuchi
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - H Murakami
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - Y Horie
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - N Katsuki
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - R Hatsuyama
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - M Edamoto
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - H Nishioka
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - M Takagi
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - T Kojima
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - S Tomita
- Astronomical Institute, Tohoku University, 6-3 Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
| | - N Ishizaka
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Kakuchi
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Sei
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - K Sugiyama
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - K Aihara
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Kambayashi
- Department of Physical Science, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - M Ota
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - S Egashira
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - T Izumi
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Nakagawa
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - K Sakai
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Iwamoto
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - N Ozaki
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
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6
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Sakai K, Moritaka T, Morita T, Tomita K, Minami T, Nishimoto T, Egashira S, Ota M, Sakawa Y, Ozaki N, Kodama R, Kojima T, Takezaki T, Yamazaki R, Tanaka SJ, Aihara K, Koenig M, Albertazzi B, Mabey P, Woolsey N, Matsukiyo S, Takabe H, Hoshino M, Kuramitsu Y. Direct observations of pure electron outflow in magnetic reconnection. Sci Rep 2022; 12:10921. [PMID: 35773286 PMCID: PMC9247195 DOI: 10.1038/s41598-022-14582-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 06/09/2022] [Indexed: 11/25/2022] Open
Abstract
Magnetic reconnection is a universal process in space, astrophysical, and laboratory plasmas. It alters magnetic field topology and results in energy release to the plasma. Here we report the experimental results of a pure electron outflow in magnetic reconnection, which is not accompanied with ion flows. By controlling an applied magnetic field in a laser produced plasma, we have constructed an experiment that magnetizes the electrons but not the ions. This allows us to isolate the electron dynamics from the ions. Collective Thomson scattering measurements reveal the electron Alfvénic outflow without ion outflow. The resultant plasmoid and whistler waves are observed with the magnetic induction probe measurements. We observe the unique features of electron-scale magnetic reconnection simultaneously in laser produced plasmas, including global structures, local plasma parameters, magnetic field, and waves.
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Affiliation(s)
- K Sakai
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan. .,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - T Moritaka
- Department of Helical Plasma Research, National Institute for Fusion Science, Toki, 509-5292, Japan
| | - T Morita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - K Tomita
- Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - T Nishimoto
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - S Egashira
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - M Ota
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - N Ozaki
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - R Kodama
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - T Kojima
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - T Takezaki
- Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama, Toyama, 930-8555, Japan
| | - R Yamazaki
- Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, 252-5258, Japan
| | - S J Tanaka
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, 252-5258, Japan
| | - K Aihara
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, 252-5258, Japan
| | - M Koenig
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, F-91120, Palaiseau cedex, France
| | - B Albertazzi
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, F-91120, Palaiseau cedex, France
| | - P Mabey
- LULI-CNRS, CEA, Sorbonne Universités, École Polytechnique, Institut Polytechnique de Paris, F-91120, Palaiseau cedex, France
| | - N Woolsey
- Department of Physics, York Plasma Institute, University of York, York, YO10 5DD, UK
| | - S Matsukiyo
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka, 816-8580, Japan
| | - H Takabe
- Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei, 10617, Taiwan
| | - M Hoshino
- Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-0033, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan
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7
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Yamazaki R, Matsukiyo S, Morita T, Tanaka SJ, Umeda T, Aihara K, Edamoto M, Egashira S, Hatsuyama R, Higuchi T, Hihara T, Horie Y, Hoshino M, Ishii A, Ishizaka N, Itadani Y, Izumi T, Kambayashi S, Kakuchi S, Katsuki N, Kawamura R, Kawamura Y, Kisaka S, Kojima T, Konuma A, Kumar R, Minami T, Miyata I, Moritaka T, Murakami Y, Nagashima K, Nakagawa Y, Nishimoto T, Nishioka Y, Ohira Y, Ohnishi N, Ota M, Ozaki N, Sano T, Sakai K, Sei S, Shiota J, Shoji Y, Sugiyama K, Suzuki D, Takagi M, Toda H, Tomita S, Tomiya S, Yoneda H, Takezaki T, Tomita K, Kuramitsu Y, Sakawa Y. High-power laser experiment forming a supercritical collisionless shock in a magnetized uniform plasma at rest. Phys Rev E 2022; 105:025203. [PMID: 35291161 DOI: 10.1103/physreve.105.025203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
We present an experimental method to generate quasiperpendicular supercritical magnetized collisionless shocks. In our experiment, ambient nitrogen (N) plasma is at rest and well magnetized, and it has uniform mass density. The plasma is pushed by laser-driven ablation aluminum (Al) plasma. Streaked optical pyrometry and spatially resolved laser collective Thomson scattering clarify structures of plasma density and temperatures, which are compared with one-dimensional particle-in-cell simulations. It is indicated that just after the laser irradiation, the Al plasma is magnetized by a self-generated Biermann battery field, and the plasma slaps the incident N plasma. The compressed external field in the N plasma reflects N ions, leading to counterstreaming magnetized N flows. Namely, we identify the edge of the reflected N ions. Such interacting plasmas form a magnetized collisionless shock.
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Affiliation(s)
- R Yamazaki
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S Matsukiyo
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - T Morita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
| | - S J Tanaka
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - T Umeda
- Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - K Aihara
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - M Edamoto
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - S Egashira
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - R Hatsuyama
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - T Higuchi
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - T Hihara
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Horie
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - M Hoshino
- Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - A Ishii
- Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, Potsdam-Golm 14476, Germany
| | - N Ishizaka
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - Y Itadani
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - T Izumi
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - S Kambayashi
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Kakuchi
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - N Katsuki
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - R Kawamura
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - Y Kawamura
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Kisaka
- Department of Physical Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - T Kojima
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - A Konuma
- Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - R Kumar
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - I Miyata
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - T Moritaka
- Fundamental Physics Simulation Research Division, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - Y Murakami
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - K Nagashima
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - Y Nakagawa
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - T Nishimoto
- School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Nishioka
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - Y Ohira
- Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - N Ohnishi
- Department of Aerospace Engineering, Tohoku University, 6-6 Aramaki Aza Aoba, Aoba, Sendai, Miyagi 980-8579, Japan
| | - M Ota
- Graduate School of Science, Osaka University, 1-1 Machikane-yama, Toyonaka, Osaka 560-0043, Japan
| | - N Ozaki
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Sano
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - K Sakai
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - S Sei
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - J Shiota
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - Y Shoji
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - K Sugiyama
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - D Suzuki
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - M Takagi
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
| | - H Toda
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - S Tomita
- Astronomical Institute, Tohoku University, 6-3 Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
| | - S Tomiya
- Department of Physical Sciences, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 252-5258, Japan
| | - H Yoneda
- Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
| | - T Takezaki
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shii, Kokuraminamiku, Kitakyushu, Fukuoka 802-0985, Japan
- Faculty of Engineering, University of Toyama, 3190, Gofuku, Toyama 930-8555, Japan
| | - K Tomita
- Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- Division of Quantum Science and Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Y Kuramitsu
- Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Y Sakawa
- Institute of Laser Engineering, Osaka University, 2-6, Yamadaoka, Suita, Osaka 565-0871, Japan
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8
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Itoh Y, Uenohara S, Adachi M, Morie T, Aihara K. Reconstructing bifurcation diagrams only from time-series data generated by electronic circuits in discrete-time dynamical systems. Chaos 2020; 30:013128. [PMID: 32013489 DOI: 10.1063/1.5119187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
Bifurcation-diagram reconstruction estimates various attractors of a system without observing all of them but only from observing several attractors with different parameter values. Therefore, the bifurcation-diagram reconstruction can be used to investigate how attractors change with the parameter values, especially for real-world engineering and physical systems for which only a limited number of attractors can be observed. Although bifurcation diagrams of various systems have been reconstructed from time-series data generated in numerical experiments, the systems that have been targeted for reconstructing bifurcation diagrams from time series measured from physical phenomena so far have only been continuous-time dynamical systems. In this paper, we reconstruct bifurcation diagrams only from time-series data generated by electronic circuits in discrete-time dynamical systems with different parameter values. The generated time-series datasets are perturbed by dynamical noise and contaminated by observational noise. To reconstruct the bifurcation diagrams only from the time-series datasets, we use an extreme learning machine as a time-series predictor because it has a good generalization property. Hereby, we expect that the bifurcation-diagram reconstruction with the extreme learning machine is robust against dynamical noise and observational noise. For quantitatively verifying the robustness, the Lyapunov exponents of the reconstructed bifurcation diagrams are compared with those of the bifurcation diagrams generated in numerical experiments and by the electronic circuits.
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Affiliation(s)
- Y Itoh
- Department of Electrical and Electronic Engineering, Hokkaido University of Science, Hokkaido 006-8585, Japan
| | - S Uenohara
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - M Adachi
- Department of Electrical and Electronic Engineering, Tokyo Denki University, Tokyo 120-8551, Japan
| | - T Morie
- Department of Human Intelligence Systems, Kyushu Institute of Technology, Kitakyushu 808-0196, Japan
| | - K Aihara
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
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9
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Affiliation(s)
- K Kariya
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - K Aihara
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - A Ueno
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - A Kimura
- The Division of Blood Transfusion, Hirosaki University School of Medicine, Hirosaki, Japan
| | - Y Yoshida
- First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
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10
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Shigekiyo T, Udaka K, Sekimoto E, Shibata H, Ozaki S, Takeda M, Aihara K. Inheritance of von Willebrand disease Vicenza in a Japanese family. Haemophilia 2018; 24:e131-e133. [PMID: 29578258 DOI: 10.1111/hae.13453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Affiliation(s)
- T Shigekiyo
- Department of Hematology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - K Udaka
- Department of Hematology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - E Sekimoto
- Department of Hematology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - H Shibata
- Department of Hematology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - S Ozaki
- Department of Hematology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - M Takeda
- Department of Ophthalmology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - K Aihara
- Department of Hematology, Endocrinology and Metabolism, Institute of Biomedical Science, Tokushima University Graduated School, Tokushima, Japan
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11
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Sato Y, Ono T, Ishikura H, Aihara K, Matsumoto T, Umei N, Tsumiyama W, Tasaka A, Oki S. Effects of unweighting the hind limb on the progression of joint contractures in rats. Physiotherapy 2016. [DOI: 10.1016/j.physio.2016.10.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Ono T, Ishikura H, Aihara K, Sato Y, Matumoto T, Umei N. Effect of a four-hour joint fixation period on joint contractures with hindlimb unweighting in rats. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Sato Y, Ono T, Ishikura H, Aihara K, Matsumoto T, Tasaka A, Umei N, Tsumiyama W, Oki S, Otsuka A. Effect of unweighting the hind limbs on joint contractures caused by joint fixation in rats. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Matusmoto T, Ono T, Ishikura H, Aihara K, Sato Y, Tasaka A, Umei N, Tsumiyama W, Oki S, Otsuka A. Distribution of muscle stretch injury in contractured muscles in rats. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Sharma A, Shrimali MD, Aihara K. Effect of mixed coupling on relay-coupled Rössler and Lorenz oscillators. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 90:062907. [PMID: 25615164 DOI: 10.1103/physreve.90.062907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Indexed: 06/04/2023]
Abstract
The complete synchronization between the outermost oscillators using the mixed coupling in relay coupled systems is studied. Mixed coupling has two types of coupling functions: coupling between similar or dissimilar variables. We examine the complete synchronization in relay-coupled systems by the largest transverse Lyapunov exponent and synchronization error. We show numerically for Rössler and Lorenz oscillators that the combination of these two types of coupling functions is able to decrease the critical coupling strength for complete synchronization as well as it also suppress oscillations for larger coupling strength.
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Affiliation(s)
- Amit Sharma
- FIRST, Aihara Innovative Mathematical Modelling Project, Japan Science and Technology Agency, Meguro-ku, Tokyo 153-8505, Japan
| | - Manish Dev Shrimali
- Department of Physics, Central University of Rajasthan, NH-8, Bandar Sindri, Ajmer 305 817, India
| | - K Aihara
- FIRST, Aihara Innovative Mathematical Modelling Project, Japan Science and Technology Agency, Meguro-ku, Tokyo 153-8505, Japan and Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
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16
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Saito K, Mukasa A, Nagae G, Aihara K, Otani R, Takayanagi S, Omata M, Tanaka S, Shibahara J, Takahashi M, Momose T, Shimamura T, Miyano S, Narita Y, Ueki K, Nishikawa R, Nagane M, Aburatani H, Saito N. EG-13 * GENOME-WIDE METHYLATION ANALYSIS IDENTIFIES GENOMIC DNA DEMETHYLATION DURING MALIGNANT PROGRESSION OF GLIOMAS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou254.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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17
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Mukasa A, Aihara K, Gotoh K, Saito K, Nagae G, Tsuji S, Tatuno K, Yamamoto S, Takayanagi S, Narita Y, Shibui S, Aburatani H, Saito N. FREQUENT H3F3A K27M MUTATIONS IN THALAMIC GLIOMAS FROM YOUNG ADULT PATIENTS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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18
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Tajima S, Koida K, Tajima CI, Aihara K, Suzuki H, Komatsu H. Task-dependent neural population dynamics in sensory cortex. J Vis 2014. [DOI: 10.1167/14.10.596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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19
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Ueki K, Aihara K, Mukasa A, Higuchi F, Matsuda H, Kim P. GENETIC AND HISTOLOGICAL STABILITY OF OLIGODENDROGLIAL TUMORS WITH 1P/19Q CO-DELETION EVEN AFTER CHEMOTHERAPY AND OR RADIATION THERAPY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou209.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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20
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Ichimura K, Fukushima S, Totoki Y, Matsushita Y, Otsuka A, Tomiyama A, Niwa T, Sakai R, Ushijima T, Nakamura T, Suzuki T, Fukuoka K, Yanagisawa T, Mishima K, Nakazato Y, Hosoda F, Narita Y, Shibui S, Yoshida A, Takami H, Mukasa A, Aihara K, Saito N, Kumabe T, Kanamori M, Tominaga T, Kobayashi K, Shimizu S, Nagane M, Iuchi T, Mizoguchi M, Yoshimoto K, Tamura K, Maehara T, Sugiyama K, Nakada M, Sakai K, Kanemura Y, Yokogami K, Takeshima H, Kawahara N, Takayama T, Yao M, Matsutani M, Shibata T, Nishikawa R. WHOLE EXOME SEQUENCING IDENTIFIED THAT THE MAPK AND PI3K PATHWAYS ARE THE MAIN TARGETS FOR MUTATIONS IN INTRACRANIAL GERM CELL TUMORS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou208.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Adachi K, Sasaki H, Nagahisa S, Yoshida K, Hattori N, Nishiyama Y, Kawase T, Hasegawa M, Abe M, Hirose Y, Alentorn A, Marie Y, Poggioli S, Alshehhi H, Boisselier B, Carpentier C, Mokhtari K, Capelle L, Figarella-Branger D, Hoang-Xuan K, Sanson M, Delattre JY, Idbaih A, Yust-Katz S, Anderson M, Olar A, Eterovic A, Ezzeddine N, Chen K, Zhao H, Fuller G, Aldape K, de Groot J, Andor N, Harness J, Lopez SG, Fung TL, Mewes HW, Petritsch C, Arivazhagan A, Somasundaram K, Thennarasu K, Pandey P, Anandh B, Santosh V, Chandramouli B, Hegde A, Kondaiah P, Rao M, Bell R, Kang R, Hong C, Song J, Costello J, Bell R, Nagarajan R, Zhang B, Diaz A, Wang T, Song J, Costello J, Bie L, Li Y, Li Y, Liu H, Luyo WFC, Carnero MH, Iruegas MEP, Morell AR, Figueiras MC, Lopez RL, Valverde CF, Chan AKY, Pang JCS, Chung NYF, Li KKW, Poon WS, Chan DTM, Wang Y, Ng HAK, Chaumeil M, Larson P, Yoshihara H, Vigneron D, Nelson S, Pieper R, Phillips J, Ronen S, Clark V, Omay ZE, Serin A, Gunel J, Omay B, Grady C, Youngblood M, Bilguvar K, Baehring J, Piepmeier J, Gutin P, Vortmeyer A, Brennan C, Pamir MN, Kilic T, Krischek B, Simon M, Yasuno K, Gunel M, Cohen AL, Sato M, Aldape KD, Mason C, Diefes K, Heathcock L, Abegglen L, Shrieve D, Couldwell W, Schiffman JD, Colman H, D'Alessandris QG, Cenci T, Martini M, Ricci-Vitiani L, De Maria R, Larocca LM, Pallini R, de Groot J, Theeler B, Aldape K, Lang F, Rao G, Gilbert M, Sulman E, Luthra R, Eterovic K, Chen K, Routbort M, Verhaak R, Mills G, Mendelsohn J, Meric-Bernstam F, Yung A, MacArthur K, Hahn S, Kao G, Lustig R, Alonso-Basanta M, Chandrasekaran S, Wileyto EP, Reyes E, Dorsey J, Fujii K, Kurozumi K, Ichikawa T, Onishi M, Ishida J, Shimazu Y, Kaur B, Chiocca EA, Date I, Geisenberger C, Mock A, Warta R, Schwager C, Hartmann C, von Deimling A, Abdollahi A, Herold-Mende C, Gevaert O, Achrol A, Gholamin S, Mitra S, Westbroek E, Loya J, Mitchell L, Chang S, Steinberg G, Plevritis S, Cheshier S, Gevaert O, Mitchell L, Achrol A, Xu J, Steinberg G, Cheshier S, Napel S, Zaharchuk G, Plevritis S, Gevaert O, Achrol A, Chang S, Harsh G, Steinberg G, Cheshier S, Plevritis S, Gutman D, Holder C, Colen R, Dunn W, Jain R, Cooper L, Hwang S, Flanders A, Brat D, Hayes J, Droop A, Thygesen H, Boissinot M, Westhead D, Short S, Lawler S, Bady P, Kurscheid S, Delorenzi M, Hegi ME, Crosby C, Faulkner C, Smye-Rumsby T, Kurian K, Williams M, Hopkins K, Faulkner C, Palmer A, Williams H, Wragg C, Haynes HR, Williams M, Hopkins K, Kurian KM, Haynes HR, Crosby C, Williams H, White P, Hopkins K, Williams M, Kurian KM, Ishida J, Kurozumi K, Ichikawa T, Onishi M, Fujii K, Shimazu Y, Oka T, Date I, Jalbert L, Elkhaled A, Phillips J, Chang S, Nelson S, Jensen R, Salzman K, Schabel M, Gillespie D, Mumert M, Johnson B, Mazor T, Hong C, Barnes M, Yamamoto S, Ueda H, Tatsuno K, Aihara K, Jalbert L, Nelson S, Bollen A, Hirst M, Marra M, Mukasa A, Saito N, Aburatani H, Berger M, Chang S, Taylor B, Costello J, Popov S, Mackay A, Ingram W, Burford A, Jury A, Vinci M, Jones C, Jones DTW, Hovestadt V, Picelli S, Wang W, Northcott PA, Kool M, Reifenberger G, Pietsch T, Sultan M, Lehrach H, Yaspo ML, Borkhardt A, Landgraf P, Eils R, Korshunov A, Zapatka M, Radlwimmer B, Pfister SM, Lichter P, Joy A, Smirnov I, Reiser M, Shapiro W, Mills G, Kim S, Feuerstein B, Jungk C, Mock A, Geisenberger C, Warta R, Friauf S, Unterberg A, Herold-Mende C, Juratli TA, McElroy J, Meng W, Huebner A, Geiger KD, Krex D, Schackert G, Chakravarti A, Lautenschlaeger T, Kim BY, Jiang W, Beiko J, Prabhu S, DeMonte F, Lang F, Gilbert M, Aldape K, Sawaya R, Cahill D, McCutcheon I, Lau C, Wang L, Terashima K, Yamaguchi S, Burstein M, Sun J, Suzuki T, Nishikawa R, Nakamura H, Natsume A, Terasaka S, Ng HK, Muzny D, Gibbs R, Wheeler D, Lautenschlaeger T, Juratli TA, McElroy J, Meng W, Huebner A, Geiger KD, Krex D, Schackert G, Chakravarti A, Zhang XQ, Sun S, Lam KF, Kiang KMY, Pu JKS, Ho ASW, Leung GKK, Loebel F, Curry WT, Barker FG, Lelic N, Chi AS, Cahill DP, Lu D, Yin J, Teo C, McDonald K, Madhankumar A, Weston C, Slagle-Webb B, Sheehan J, Patel A, Glantz M, Connor J, Maire C, Francis J, Zhang CZ, Jung J, Manzo V, Adalsteinsson V, Homer H, Blumenstiel B, Pedamallu CS, Nickerson E, Ligon A, Love C, Meyerson M, Ligon K, Mazor T, Johnson B, Hong C, Barnes M, Jalbert LE, Nelson SJ, Bollen AW, Smirnov IV, Song JS, Olshen AB, Berger MS, Chang SM, Taylor BS, Costello JF, Mehta S, Armstrong B, Peng S, Bapat A, Berens M, Melendez B, Mollejo M, Mur P, Hernandez-Iglesias T, Fiano C, Ruiz J, Rey JA, Mock A, Stadler V, Schulte A, Lamszus K, Schichor C, Westphal M, Tonn JC, Unterberg A, Herold-Mende C, Morozova O, Katzman S, Grifford M, Salama S, Haussler D, Nagarajan R, Zhang B, Johnson B, Bell R, Olshen A, Fouse S, Diaz A, Smirnov I, Kang R, Wang T, Costello J, Nakamizo S, Sasayama T, Tanaka H, Tanaka K, Mizukawa K, Yoshida M, Kohmura E, Northcott P, Hovestadt V, Jones D, Kool M, Korshunov A, Lichter P, Pfister S, Otani R, Mukasa A, Takayanagi S, Saito K, Tanaka S, Shin M, Saito N, Ozawa T, Riester M, Cheng YK, Huse J, Helmy K, Charles N, Squatrito M, Michor F, Holland E, Perrech M, Dreher L, Rohn G, Goldbrunner R, Timmer M, Pollo B, Palumbo V, Calatozzolo C, Patane M, Nunziata R, Farinotti M, Silvani A, Lodrini S, Finocchiaro G, Lopez E, Rioscovian A, Ruiz R, Siordia G, de Leon AP, Rostomily C, Rostomily R, Silbergeld D, Kolstoe D, Chamberlain M, Silber J, Roth P, Keller A, Hoheisel J, Codo P, Bauer A, Backes C, Leidinger P, Meese E, Thiel E, Korfel A, Weller M, Saito K, Mukasa A, Nagae G, Nagane M, Aihara K, Takayanagi S, Tanaka S, Aburatani H, Saito N, Salama S, Sanborn JZ, Grifford M, Brennan C, Mikkelsen T, Jhanwar S, Chin L, Haussler D, Sasayama T, Tanaka K, Nakamizo S, Nishihara M, Tanaka H, Mizukawa K, Kohmura E, Schliesser M, Grimm C, Weiss E, Claus R, Weichenhan D, Weiler M, Hielscher T, Sahm F, Wiestler B, Klein AC, Blaes J, Weller M, Plass C, Wick W, Stragliotto G, Rahbar A, Soderberg-Naucler C, Sulman E, Won M, Ezhilarasan R, Sun P, Blumenthal D, Vogelbaum M, Colman H, Jenkins R, Chakravarti A, Jeraj R, Brown P, Jaeckle K, Schiff D, Dignam J, Atkins J, Brachman D, Werner-Wasik M, Gilbert M, Mehta M, Aldape K, Terashima K, Shen J, Luan J, Yu A, Suzuki T, Nishikawa R, Matsutani M, Liang Y, Man TK, Lau C, Trister A, Tokita M, Mikheeva S, Mikheev A, Friend S, Rostomily R, van den Bent M, Erdem L, Gorlia T, Taphoorn M, Kros J, Wesseling P, Dubbink H, Ibdaih A, Sanson M, French P, van Thuijl H, Mazor T, Johnson B, Fouse S, Heimans J, Wesseling P, Ylstra B, Reijneveld J, Taylor B, Berger M, Chang S, Costello J, Prabowo A, van Thuijl H, Scheinin I, van Essen H, Spliet W, Ferrier C, van Rijen P, Veersema T, Thom M, Meeteren ASV, Reijneveld J, Ylstra B, Wesseling P, Aronica E, Kim H, Zheng S, Mikkelsen T, Brat DJ, Virk S, Amini S, Sougnez C, Chin L, Barnholtz-Sloan J, Verhaak RGW, Watts C, Sottoriva A, Spiteri I, Piccirillo S, Touloumis A, Collins P, Marioni J, Curtis C, Tavare S, Weiss E, Grimm C, Schliesser M, Hielscher T, Claus R, Sahm F, Wiestler B, Klein AC, Blaes J, Tews B, Weiler M, Weichenhan D, Hartmann C, Weller M, Plass C, Wick W, Yeung TPC, Al-Khazraji B, Morrison L, Hoffman L, Jackson D, Lee TY, Yartsev S, Bauman G, Zheng S, Fu J, Vegesna R, Mao Y, Heathcock LE, Torres-Garcia W, Ezhilarasan R, Wang S, McKenna A, Chin L, Brennan CW, Yung WKA, Weinstein JN, Aldape KD, Sulman EP, Chen K, Koul D, Verhaak RGW. OMICS AND PROGNSTIC MARKERS. Neuro Oncol 2013; 15:iii136-iii155. [PMCID: PMC3823898 DOI: 10.1093/neuonc/not183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023] Open
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Bie L, Li Y, Yuan H, Bondy M, Bainbridge M, Jhangiani S, Jalali A, Plon SE, Armstrong G, Bernstein J, Claus E, Davis F, Houlston R, Il'yasova D, Jenkins R, Johansen C, Lachance D, Lai R, Lau C, Merrell R, Olson S, Sadetzki S, Schildkraut J, Shete S, Barnholtz-Sloan J, Wrensch M, Consortium TG, Melin B, Gibbs RA, Haberler C, Czech T, Chocholous M, Dorfer C, Slavc I, Hayashi S, Sasaki H, Kimura T, Nakamura T, Miwa T, Hirose Y, Yoshida K, Jalali A, Bainbridge M, Jhangiani S, Plon SE, Armstrong G, Bernstein J, Claus E, Davis F, Houlston R, Il'yasova D, Jenkins R, Johansen C, Lachance D, Lai R, Lau C, Merrell R, Olson SH, Sadetzki S, Schildkraut J, Shete S, Barnholtz-Sloan J, Wrensch M, Melin B, Gibbs RA, Bondy M, Jenkins R, Wrensch M, Kollmeyer T, Armstrong G, Olson S, Lai R, Lachance D, Lau C, Claus E, Barnholtz-Sloan J, Il'yasova D, Schildkraut J, Houlston R, Shete S, Bernstein J, Davis F, Merrell R, Johansen C, Sadetzki S, Consortium TG, Melin B, Bondy M, Palmer J, Li J, Kenyon L, Andrews D, Kim L, Glass J, Werner-Wasik M, Shi W, Takayanagi S, Mukasa A, Aihara K, Saito K, Otani R, Tanaka S, Nakatomi H, Aburatani H, Ichimura K, Ueki K, Saito N, Walsh KM, Decker PA, Eckel-Passow JE, Molinaro AM, Hansen HM, Rice T, Zheng S, Kollmeyer T, Berger MS, Chang SM, Prados MD, Rynearson A, Caron A, Kosel ML, Lachance DH, O'Neill BP, Giannini C, Wiencke JK, Jenkins RB, Wrensch MR, Wang Z, Bao Z, Jiang T, Wang Z, Bao Z, Jiang T. MOLECULAR EPIDEMIOLGOY. Neuro Oncol 2013. [DOI: 10.1093/neuonc/not180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Termsaithong T, Aihara K. Dynamical correlation patterns and corresponding community structure in neural spontaneous activity at criticality. Cogn Neurodyn 2013; 7:381-93. [PMID: 24427213 PMCID: PMC3773324 DOI: 10.1007/s11571-013-9251-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 03/18/2013] [Accepted: 03/28/2013] [Indexed: 11/27/2022] Open
Abstract
It has been considered that the state in the vicinity of a critical point, which is the point between ordered and disordered states, can underlie and facilitate information processing of the brain in various aspects. In this research, we numerically study the influence of criticality on one aspect of brain information processing, i.e., the community structure, which is an important characteristic of complex networks. We examine community structure of the functional connectivity in simulated brain spontaneous activity, which is based on dynamical correlations between neural activity patterns at different positions. The brain spontaneous activity is simulated by a neural field model whose parameter covers subcritical, critical, and supercritical regions. Then, the corresponding dynamical correlation patterns and community structure are compared. In the critical region, we found some distinctive properties, namely high correlation and correlation switching, high modularity and a low number of modules, high stability of the dynamical functional connectivity, and moderate flexibility of the community structure across temporal scales. We also discuss how these characteristics might improve information processing of the brain.
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Affiliation(s)
- T. Termsaithong
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505 Japan
| | - K. Aihara
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505 Japan
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Jensen RL, Abraham S, Hu N, Jensen RL, Boulay JL, Leu S, Frank S, Vassella E, Vajtai I, von Felten S, Taylor E, Schulz M, Hutter G, Sailer M, Hench J, Mariani L, van Thuijl HF, Scheinin I, van Essen DF, Heimans JJ, Wesseling P, Ylstra B, Reijneveld JC, Borges AR, Larrubia PL, Marques JMB, Cerdan SG, Brastianos P, Horowitz P, Santagata S, Jones RT, McKenna A, Getz G, Ligon K, Palescandolo E, Van Hummelen P, Stemmer-Rachamimov A, Louis D, Hahn WC, Dunn I, Beroukhim R, Guan X, Vengoechea J, Zheng S, Sloan A, Chen Y, Brat D, O'Neill BP, Cohen M, Aldape K, Rosenfeld S, Noushmehr H, Verhaak RG, Barnholtz-Sloan J, Bahassi EM, Li YQ, Cross E, Li W, Vijg J, McPherson C, Warnick R, Stambrook P, Rixe O, Manterola L, Tejada-Solis S, Diez-Valle R, Gonzalez M, Jauregui P, Sampron N, Barrena C, Ruiz I, Gallego J, Delattre JY, de Munain AL, Mlonso MM, Saito K, Mukasa A, Nagae G, Aihara K, Takayanagi S, Aburatani H, Saito N, Kong XT, Fu BD, Du S, Hasso AN, Linskey ME, Bota D, Li C, Chen YS, Chen ZP, Kim CH, Cheong JH, Kim JM, Yelon NP, Jacoby E, Cohen ZR, Ishida J, Kurozumi K, Ichikawa T, Onishi M, Fujii K, Shimazu Y, Date I, Narayanan R, Ho QH, Levin BS, Maeder ML, Joung JK, Nutt CL, Louis DN, Thorsteinsdottir J, Fu P, Gehrmann M, Multhoff G, Tonn JC, Schichor C, Thirumoorthy K, Gordon N, Walston S, Patel D, Okamoto M, Chakravarti A, Palanichamy K, French P, Erdem L, Gravendeel L, de Rooi J, Eilers P, Idbaih A, Spliet W, den Dunnen W, Teepen J, Wesseling P, Smitt PS, Kros JM, Gorlia T, van den Bent M, McCarthy D, Cook RW, Oelschlager K, Maetzold D, Hanna M, Wick W, Meisner C, Hentschel B, Platten M, Sabel MC, Koeppen S, Ketter R, Weiler M, Tabatabai G, Schilling A, von Deimling A, Gramatzki D, Westphal M, Schackert G, Loeffler M, Simon M, Reifenberger G, Weller M, Moren L, Johansson M, Bergenheim T, Antti H, Sulman EP, Goodman LD, Wani KM, DeMonte F, Aldape KD, Krischek B, Gugel I, Aref D, Marshall C, Croul S, Zadeh G, Nilsson CL, Sulman E, Liu H, Wild C, Lichti CF, Emmett MR, Lang FF, Conrad C, Alentorn A, Marie Y, Boisselier B, Carpetier C, Mokhtari K, Hoang-Xuan K, Capelle L, Delattre JY, Idbaih A, Lautenschlaeger T, Huebner A, McIntyre JB, Magliocco T, Chakravarti A, Hamilton M, Easaw J, Pollo B, Calatozzolo C, Vuono R, Guzzetti S, Eoli M, Silvani A, Di Meco F, Filippini G, Finocchiaro G, Joy A, Ramesh A, Smirnov I, Reiser M, Shapiro W, Mills G, Kim S, Feuerstein B, Gonda DD, Li J, McCabe N, Walker S, Goffard N, Wikstrom K, McLean E, Greenan C, Delaney T, McCarthy M, McDyer F, Keating KE, James IF, Harrison T, Mullan P, Harkin DP, Carter BS, Kennedy RD, Chen CC, Patel AS, Allen JE, Dicker DT, Rizzo K, Sheehan JM, Glantz MJ, El-Deiry WS, Salhia B, Ross JT, Kiefer J, Van Cott C, Metpally R, Baker A, Sibenaller Z, Nasser S, Ryken T, Ramanathan R, Berens ME, Carpten J, Tran NL, Bi Y, Pal S, Zhang Z, Gupta R, Macyszyn L, Fetting H, O'Rourke D, Davuluri RV, Ezrin AM, Moore K, Stummer W, Hadjipanayis CG, Cahill DP, Beiko J, Suki D, Prabhu S, Weinberg J, Lang F, Sawaya R, Rao G, McCutcheon I, Barker FG, Aldape KD, Trister AD, Bot B, Fontes K, Bridge C, Baldock AL, Rockhill JK, Mrugala MM, Rockne RR, Huang E, Swanson KR, Underhill HR, Zhang J, Shi M, Lin X, Mikheev A, Rostomily RC, Scheck AC, Stafford P, Hughes A, Cichacz Z, Coons SW, Johnston SA, Mainwaring L, Horowitz P, Craig J, Garcia D, Bergthold G, Burns M, Rich B, Ramkissoon S, Santagata S, Eberhart C, Ligon A, Goumnerova L, Stiles C, Kieran M, Hahn W, Beroukhim R, Ligon K, Ramkissoon S, Olausson KH, Correia J, Gafni E, Liu H, Theisen M, Craig J, Hayashi M, Haidar S, Maire C, Mainwaring LA, Burns M, Norden A, Wen P, Stiles C, Ligon A, Kung A, Alexander B, Tonellato P, Ligon KL. LAB-OMICS AND PROGNOSTIC MARKERS. Neuro Oncol 2012. [DOI: 10.1093/neuonc/nos231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tanizawa K, Handa T, Nagai S, Ito I, Kubo T, Ito Y, Watanabe K, Aihara K, Mishima M, Izumi T. A CD40 single-nucleotide polymorphism affects the lymphocyte profiles in the bronchoalveolar lavage of Japanese patients with sarcoidosis. ACTA ACUST UNITED AC 2012; 78:442-5. [PMID: 22077624 DOI: 10.1111/j.1399-0039.2011.01783.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
CD40 plays a critical role in adaptive immunity, and alveolar macrophages in patients with sarcoidosis express higher levels of CD40. This study investigated the association of rs1883832, a functional single-nucleotide polymorphism in the CD40 gene with susceptibility to sarcoidosis and phenotypes of sarcoidosis. Genotyping of rs1883832 in 175 Japanese patients with sarcoidosis and 150 age- and sex-matched controls revealed no significant difference between the genotypes of the patient and control groups (CC/CT/TT, 32.8/52.0/14.7% in the patients; 37.3/48.0/14.7% in the controls, P = 0.66; allele C, 59.1% in the patients, 61.3% in the controls, P = 0.57). T-cell and CD4+ cell counts in the bronchoalveolar lavage fluid were significantly higher in the TT genotype group than in the CC and CT genotype group.
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Affiliation(s)
- K Tanizawa
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Imai C, Tajima S, Aihara K, Suzuki H. Hybrid coding of colors: How can we unify color discrimination, categorization and memory? J Vis 2011. [DOI: 10.1167/11.11.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Wang Z, Fan H, Aihara K. Three synaptic components contributing to robust network synchronization. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:051905. [PMID: 21728569 DOI: 10.1103/physreve.83.051905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 03/17/2011] [Indexed: 05/31/2023]
Abstract
Robust synchronized activity is widely observed in real neural systems. However, a mechanism for robust synchronization that can be understood analytically, and has a clear physical meaning, remains elusive. This paper considers such a mechanism by formalizing three synaptic components contributing to robust synchronization in networks with heterogeneous external drive currents and conductance-based synapses. The first component arises from the assumption that the aggregate post-synaptic potential of a neuron decays more if it fires later within a spike volley. The second component results because neurons with smaller drives have reached a lower membrane potential at the time when the volley of inputs arrives than that reached by neurons with larger drives. The third component arises from the assumption that neurons firing later in the previous volley have had less time to integrate their drives than neurons firing earlier have had, again causing a lower membrane potential at the time when the volley of inputs arrives. Because of the voltage-dependent properties of synaptic currents, either of the last two components will cause smaller inhibitions for the later-firing neurons if the synapses are inhibitory. This smaller inhibition causes the later-firing neurons to fire earlier in the next cycle, thereby forcing them toward synchrony. With these three synaptic components, we discuss the relationship between the robustness of the synchrony and the parameters, search for the optimal parameter set for the robust network synchronization of a certain frequency band, and demonstrate the key role of the voltage-dependent properties of synaptic currents in robust or stable synchronization.
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Affiliation(s)
- Z Wang
- College of Information Science and Technology, Donghua University, Shanghai, China
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Tanizawda K, Handa T, Naga S, Ito EY, Watanabe K, Aihara K, Izumi T, Mishima M. CD24 gene exon 2 dimorphism does not affect disease susceptibility in Japanese sarcoidosis patients. Sarcoidosis Vasc Diffuse Lung Dis 2010; 27:64-69. [PMID: 21086907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND CD24 proteins are expressed on several inflammatory cells, and play an important role for the T-cell activation. OBJECTIVES The aim of this study is to investigate the relationship of a CD24 gene polymorphism to disease susceptibility or clinical findings including bronchoalveolar lavage (BAL) cell profiles in Japanese sarcoidosis patients. METHODS A previously reported functional single nucleotide polymorphism (SNP) of CD24 gene exon 2 was examined in 186 Japanese sarcoidosis patients and 146 sex and age-matched healthy controls using restriction fragment length polymorphism method. The distribution of genotypes was compared between the two groups. The association between genotypes or alleles and clinical features or BAL cell profiles was also examined. RESULTS There were no significant differences in the distribution of genotypes or allele frequencies between sarcoidosis and controls. There were also no significant differences in clinical features or BAL cell profiles among patients with different genotypes of CD24. CONCLUSIONS There was no relationship between a CD24 exon 2 SNP and disease susceptibility or clinical findings in Japanese sarcoidosis patients.
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Affiliation(s)
- K Tanizawda
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Tanaka G, Aihara K. Complex-Valued Multistate Associative Memory With Nonlinear Multilevel Functions for Gray-Level Image Reconstruction. ACTA ACUST UNITED AC 2009; 20:1463-73. [DOI: 10.1109/tnn.2009.2025500] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fan H, Wang Z, Chen L, Aihara K. Feedback mechanism in network dynamics with preferential flow. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:026107. [PMID: 19391806 DOI: 10.1103/physreve.79.026107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 12/22/2008] [Indexed: 05/27/2023]
Abstract
We study complex systems or networks in which each node holds an internal dynamics and interacts with other nodes through some kinds of topologies. Collective behavior with dynamical fluctuations is analyzed in complex systems. The dynamical fluctuations of a node can be divided into two parts: one is the internal dynamical fluctuation of the node and the other is the external dynamical fluctuation caused by other nodes. Based on a theoretical analysis, a hidden feedback mechanism is identified in complex systems, which is illustrated in a macroeconomic network and in a city-population network. Furthermore, we study the effect of the topology of the networks on the feedback mechanism. The feedback mechanism is preserved for hub nodes in the networks with a scale-free topology as well as in the networks with an evolving topology. By the hidden feedback mechanism, the observation data can be utilized to judge directly whether the system of each node is with positive feedback or with negative feedback even without knowing its dynamical model.
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Affiliation(s)
- H Fan
- Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-8656, Japan.
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Ichinose N, Yada T, Gotoh O, Aihara K. Reconstruction of transcription-translation dynamics with a model of gene networks. J Theor Biol 2008; 255:378-86. [PMID: 18845165 DOI: 10.1016/j.jtbi.2008.09.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2007] [Revised: 09/02/2008] [Accepted: 09/02/2008] [Indexed: 11/19/2022]
Abstract
A transcription-translation model of gene networks and a method to reconstruct it from gene expression data are proposed. The model is a hybrid system based on the Glass network with continuous-time dynamics and logical interactions. Transcription-translation dynamics is introduced into the Glass network. The reconstruction of gene networks is reduced to the problem of estimating logical functions from binary representations of quantities of mRNAs and proteins. The reconstruction method is applied to the gene expression data of circadian rhythms. The response characteristics of the reconstructed gene network to periodic stimuli are analyzed. The results suggest the existence of a receiver gene that responds to an external signal, consistently with biological knowledge.
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Affiliation(s)
- N Ichinose
- Graduate School of Informatics, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
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Fan H, Wang Z, Ohnishi T, Saito H, Aihara K. Multicommunity weight-driven bipartite network model. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:026103. [PMID: 18850893 DOI: 10.1103/physreve.78.026103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Revised: 04/08/2008] [Indexed: 05/26/2023]
Abstract
Community structure and rewiring phenomena exist in many complex networks, particularly in bipartite networks. We construct a model for the degree distribution of the rewiring problem in a multicommunity weight-driven bipartite network (MCWBN). The network consists of many interconnected communities, each of which holds a bipartite graph. The bipartite graph consists of two sets of nodes. We name each node in one set a "producer" and each node in the other set a "consumer." A weight value matrix defining the trade barrier between any two communities is used to characterize the structure of the communities, which ensures the higher preferential attachment probability in intracommunity than in intercommunity. The size of one producer is defined as the number of consumers connected to it. We find that the nonlinear dynamics of the scale of production, or the total size of all producers in each community is dependent only on the initial scale of production in each community, and independent of the distribution of the producer size. Furthermore, if the nonlinear system of the scale of production in each community is at an equilibrium state, the distribution of the producer size in each community of the MCWBN model is equivalent to that in a one-community model.
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Affiliation(s)
- H Fan
- Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-8656, Japan
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Kurobe H, Urata M, Izawa Y, Fukuhara Y, Kanbara T, Aihara K, Tamaki T, Matsumoto T, Kitagawa T, Yoshizumi M, Tomita S. YI-812 HIF-1 SIGNALING PATHWAY PLAYS A CRUCIAL ROLE IN THE PROGRESSION OF ATHEROSCLEROSIS. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71822-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Simultaneous three-way observation of optical, acoustic and electric properties demonstrates a theoretical prediction that a spinning prolate spheroid can spontaneously lose contact with the table in the course of its rising motion when the contact friction is weak and the spin is large enough. The durations of the first loss of contact are measured for various initial spin rates and for three aspect ratios. The measurements show good agreements with numerical simulations. It is also visually shown that a spinning hard-boiled egg can jump.
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Affiliation(s)
- T Mitsui
- Department of Physics, Hiyoshi Campus, Keio UniversityHiyoshi, Yokohama 223-8521, Japan
| | - K Aihara
- Faculty of Science and Technology, Yagami Campus, Keio UniversityHiyoshi, Yokohama 223-8522, Japan
| | - C Terayama
- Department of Physics, Hiyoshi Campus, Keio UniversityHiyoshi, Yokohama 223-8521, Japan
| | - H Kobayashi
- Department of Physics, Hiyoshi Campus, Keio UniversityHiyoshi, Yokohama 223-8521, Japan
| | - Y Shimomura
- Department of Physics, Hiyoshi Campus, Keio UniversityHiyoshi, Yokohama 223-8521, Japan
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Aihara K, Azuma H, Akaike M, Kurobe H, Fujimura M, Hashizume S, Ikeda Y, Yagi S, Kitagawa T, Matsumoto T. Mo-P4:271 Plasma heparin cofactor II activity is a predictor for incidence of peripheral arterial disease in patients with cardiovascular risk factors. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80404-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fujimura M, Akaike M, Iwase T, Yagi S, Ikeda Y, Hashizume S, Aihara K, Azuma H, Matsumoto T. Mo-P4:252 Improvement of cardiac function in response to carvedilol is accompanied by increased adiponectin levels in patients with chronic heart failure. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80385-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Akaike M, Aihara K, Yagi S, Ikeda Y, Ishikawa K, Iwase T, Hashizume S, Fujimura M, Azuma H, Matsumoto T. Th-P16:359 Pitavastatin ameliorates glucocorticoid-induced hypertension through increasing expression of endothelial nitric oxide synthase. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82317-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kurobe H, Isawa Y, Fukuhara Y, Aihara K, Akaike M, Kitagawa T, Matsumoto T, Tamaki T, Tomita S, Yoshizumi M. Tu-P7:231 HIF1alpha-ARNT transcriptional system of T lymphocytes may regulate the vascular inflammation and remodeling in the arteriosclerosis disease. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80935-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Takamori N, Akaike M, Aihara K, Hirono A, Yamaguchi H, Azuma H, Tamura K, Matsumoto T. Mo-P1:17 Plasma heparin cofactor II activity is a noble predictor of cardiovascular risk in patients with coronary heart disease. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80152-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Tanaka G, Sanjuán MAF, Aihara K. Crisis-induced intermittency in two coupled chaotic maps: towards understanding chaotic itinerancy. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:016219. [PMID: 15697710 DOI: 10.1103/physreve.71.016219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2003] [Revised: 07/23/2004] [Indexed: 05/24/2023]
Abstract
The present paper considers crisis-induced intermittency in a system composed of two coupled logistic maps. Its purpose is to clarify a bifurcation scenario generating such intermittent behaviors that can be regarded as a simple example of chaotic itinerancy. The intermittent dynamics appears immediately after an attractor-merging crisis of two off-diagonal chaotic attractors in a symmetrically coupled system. The scenario for the crisis is investigated through analyses of sequential bifurcations leading to the two chaotic attractors and successive changes in basin structures with variation of a system parameter. The successive changes of the basins are also characterized by variation of a dimension of a fractal basin boundary. A numerical analysis shows that simultaneous contacts between the attractors and the fractal basin boundary bring about the crisis and a snap-back repeller generated at the crisis produces the intermittent transitions. Furthermore, a modified scenario for intermittent behaviors in an asymmetrically coupled system is also discussed.
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Affiliation(s)
- G Tanaka
- Department of Complexity Science and Engineering, Graduate School of Frontier Science, The University of Tokyo, Tokyo, 113-8656, Japan
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Kato M, Azuma H, Iwase T, Hashizume S, Yamaguchi H, Yoshida T, Fujimura M, Aihara K, Kanagawa Y, Ikeda K, Akaike M, Matsumoto T. 1P-0173 Pitavastatin (NK-104) elicits a cytoprotective effect on vascular endothelial cells through increased expression of aminopeptidase N (APN/CD13). ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90246-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Aihara K, Azuma H, Akaike M, Fujimura M, Hashizume S, Yoshida T, Kato M, Yamaguchi H, Kato S, Matsumoto T. 3P-0850 Lipopolysaccharide-induced thrombus formation in mice lacking vitamin D receptor. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91068-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Moriwaki T, Matsuura H, Aihara K, Shiromaru H, Achiba Y. Low-energy collision of negative carbon cluster ions with surfaces: collision-induced electron detachment. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100202a002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Normal vowels are known to have irregularities in the pitch-to-pitch variation which is quite important for speech signals to be perceived as natural human sound. Such pitch-to-pitch variation of vowels is studied in the light of nonlinear dynamics. For the analysis, five normal vowels recorded from three male and two female subjects are exploited, where the vowel signals are shown to have normal levels of the pitch-to-pitch variation. First, by the false nearest-neighbor analysis, nonlinear dynamics of the vowels are shown to be well analyzed by using a relatively low-dimensional reconstructing dimension of 4 < or = d < or = 7. Then, we further studied nonlinear dynamics of the vowels by spike-and-wave surrogate analysis. The results imply that there exists nonlinear dynamical correlation between one pitch-waveform pattern to another in the vowel signals. On the basis of the analysis results, applicability of the nonlinear prediction technique to vowel synthesis is discussed.
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Affiliation(s)
- I Tokuda
- Department of Computer Science and Systems Engineering, Muroran Institute of Technology, Hokkaido, Japan.
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