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Towards a Common Principle of Biological Control
Hidenori Kimura,Shingo Shimoda,Lu Gaohua,Reiko J. Tanaka 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper reviews the interplay between biology and control theory as a typical example of trans disciplinary knowledge integration. Control is a fundamental function of the living or ganism that works in all a spects of the life. Various control mechanisms are ubiquitously built-inatall levels of body structures of living or ganisms and work all the time to support the life. They are diversely different from one to an other with different material bases and structures, but there are many reasons to think that have some common ground and design principles. It is argued that a unified approach is exploited by focusing on a biological way of dealing with environmental changes to invest igatevarious controle chanisms of living or ganisms. The notion of compound control is proposed as a common principle of biological control based on the trans disciplinary nature of control theory.
Numerical Study of Slow-wave Instabilities in an Oversized Coaxial Slow-wave Structure
Kazuo Ogura,Shingo Abe,Hiroki Kimura,Kazumasa Yamamoto,Kiyoyuki Yambe,Ruhul Amin 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
In this paper, slow-wave instabilities in oversized coaxial SWSs are numerically analyzed. An infinitesimally thin annular beam with transverse perturbations and guided by a finite axial magnetic field is considered as the energy source for creating the instabilities. The coaxial SWSs consist of an outer oversized hollow waveguide and a central conductor and have sinusoidal corrugations. An electromagnetic slow-wave is generated by the inner corrugation and is called inner surface wave (ISW). The ISW is a cylindrical surface wave and can exist even if the outer conductor is removed. The higher-order modes are produced by the outer waveguide. The annular beam interacts with the ISW and higher-order modes. Slow cyclotron instability occurs due to the transversely modulated beam boundary, in addition to the conventional Cherenkov instability. The slow-wave instabilities are able to be controlled by the beam radius and the relative position of inner and outer corrugations.
( Ken Hatogai ),( Naoki Hosoe ),( Hiroyuki Imaeda ),( Jean Francois Rey ),( Sawako Okada ),( Yuka Ishibashi ),( Kayoko Kimura ),( Kazuaki Yoneno ),( Shingo Usui ),( Yosuke Ida ),( Nobuhiro Tsukada ),( 대한소화기학회 2012 Gut and Liver Vol.6 No.2
Background/Aims: A flexible spectral imaging color enhancement system was installed in new capsule software for video capsule endoscopy. Contrast image capsule endoscopy (CICE) is a novel technology using light-emitting diodes selected for the main absorption range of hemoglobin. We assessed the feasibility and diagnostic effi cacy for small bowel surveillance in patients with polyposis syndromes. Methods: Six patients with polyposis syndromes, four with familial adenomatous polyposis and one each with Cowden syndrome (CS) and Cronkhite-Canada syndrome (CCS) were examined using CICE. We conducted three evaluations to assess the effect on the numbers of the detected polyps; compare polyp diagnostic rates between adenoma and hamartoma; and assess polyp visibility. Results: The numbers of detected polyps and diagnostic accuracy did not differ signifi cantly between pre-contrast and contrast images. However, 50% of the adenomatous polyps displayed enhanced visibility on contrast images. CICE contrast images exhibited clearly demarcated lesions and improved the visibility of minute structures of adenomatous polyps. Hamartomatous polyp micro-structures in patients with CS and CCS were more clearly visualized on contrast than pre-contrast images. Conclusions: CICE is an effective tool for enhancing the visibility of polyps in patients with polyposis syndrome. (Gut Liver 2012;6:218-222)