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Missile Defense and Extended Deterrence in the Japan-US Alliance
( Umemoto Tetsuya ) 한국국방연구원 2000 The Korean Journal of Defense Analysis Vol.12 No.2
As long as the United States remains vulnerable to an attack with long-range nuclear missiles, Japanese confidence in US extended deterrence would rest on the ability of Tokyo and Washington to (1) maintain a favorable balance in conventional forces most relevant to the defense of Japan, (2) avoid provoking the potential adversary into threatening a nuclear assault against Japan and (3) fasten the bilateral relationship so as to impress the adversary about the possibility of us response with strategic nuclear weapons in case he launched such an assault. Further Japanese cooperation in the US theater missile defense (TMD) program would generally have positive effects as regards the first and third conditions above, although management of the process might be quite challenging. The impact on the second condition would be harder to judge, largely because it is difficult to predict how missile defense in East Asia might affect Chinese nuclear strategy.
Report on HbA1c Proficiency Testing in Asia in 2012
Masao Umemoto,Tadao Hoshino,Tetsuo Miyashita,Wataru Tani,Katsuhiko Kuwa 대한진단검사의학회 2015 Annals of Laboratory Medicine Vol.35 No.3
In 2010, the Japan Diabetes Society decided to introduce the National Glycohemoglobin Standardization Program (NGSP) values into clinical practice. Accordingly, NGSP Certification of Japanese manufacturers of HbA1c-related diagnostic reagents and instruments was initiated in February, 2012, through an NGSP network laboratory, the Asian Secondary Reference Laboratory (ASRL) #1. Traceability to the NGSP reference system can be endorsed by manufacturer certification, as well as by the College of American Pathologists (CAP) survey. Nevertheless, only a few manufacturers participate in the CAP survey in Japan. Thus, proficiency testing (PT) was proposed and executed by ASRL #1. Single-donor whole-blood samples were used for the PT. The participated measurement systems were NGSP certified. Twenty-two laboratories obtained certification through ASRL #1; 2 through the Secondary Reference Laboratory (SRL) #8; and 9 through the SRL #9. The combination plots of the bias data in this PT and in the NGSP certification performed in March and May in 2012 were consistent with each other: mean NGSP values at each level agreed well with the target value. In conclusion, PT using whole blood is useful in endorsing NGSP certification.
Analysis of Dynamic Quantizer in 2-DOF Internal Model Control System with Dead-time
Hiroshi Okajima,Tatsuya Umemoto,Nobutomo Matsunaga,Shigeyasu Kawaji 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
It is well known that plants with dead-time are difficult to be controlled by using traditional control method. For this, controller with dead-time have been proposed for the systems with dead-time, e.g. In ternal Model Control(IMC), Smith-method. However, it would be difficulttorealize the dead-time component of controller because of memory limit of micro control unit(MCU). The sampling time might be large in case of the application to the plant with large time delay. Hence, the trade-off between sampling time and maximum quantizing error exists. In this paper, the design method of dynamic quantizers are proposed for achieving small quantizing error for control systems in MCU. The effectiveness of the proposed method is shown by numerical example.