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Robust and Optimal Attitude Control Law Design for Spacecraft with Inertia Uncertainties
Park, Yon-Mook,Tahk, Min-Jea The Korean Society for Aeronautical and Space Scie 2002 International Journal of Aeronautical and Space Sc Vol.3 No.2
This paper considers the robust and optimal three-axis attitude stabilization of rigid spacecraft with inertia uncertainties. The attitude motion of rigid spacecraft described in terms of either the Cayley-Rodrigues parameters or the Modified Rodrigues parameters is considered. A class of robust nonlinear control laws with relaxed feedback gain structures is proposed for attitude stabilization of rigid spacecraft with inertia uncertainties. Global asymptotic stability of the proposed control laws is shown by using the LaSalle Invariance Principle. The optimality properties of the proposed control laws are also investigated by using the Hamilton-Jacobi theory. A numerical example is given to illustrate the theoretical results presented in this paper.
Least Squares Based PID Control of an Electromagnetic Suspension System
Park, Yon-Mook,Tahk, Min-Jea,Nam, Myeong-Ryong,Seo, In-Ho,Lee, Sang-Hyun,Lim, Jong-Tae The Korean Society for Aeronautical and Space Scie 2003 International Journal of Aeronautical and Space Sc Vol.4 No.2
In this paper, we develop the so-called functional test model for magnetic bearing wheels. The functional test model developed in this paper is a kind of electromagnetic suspension systems and has three degree of freedom, which consists of one axial suspension from gravity and the other two axes gimbaling capability to small angle, and does not include the motor. For the control of the functional test model, we derive the optimal electromagnetic forces based on the least squares method, and use the proportional-integral derivative controller. Then, we develop a hardware setup, which mainly consists of the digital signal processor and the 12-bit analog-to-digital and digital-to-analog converters, and show the experimental results.
유전자 재조합 B 형 간염 바이러스 표면 항원 , CJC-50100 의 일반약리작용
정성학(Seong Hak Jeong),최재묵(Jae Mook Choi),이남중(Nam Jung Lee),전형수(Hyung Soo Jeon),김연희(Yon Hee Kim),김재승(Jae Seung Kim),하석훈(Suk Hoon Ha),김영훈(Young Hoon Kim),이나경(Na Gyung Lee),김제학(Je Hak Kim),박완제(Wan Je Park 한국응용약물학회 2001 Biomolecules & Therapeutics(구 응용약물학회지) Vol.9 No.1
N/A CJC-50100 is a recombinant hepatitis B virus surface antigen (HBsAg) expressed in yeast. The general pharmacological properties of CJC-50100 were evaluated in mice, rats, dogs and isolated guinea pig ileum. The doses were 0.33∼33.3 ㎍/㎏ i.m. for mice and rats and 3.3∼9.9 ㎍/㎏ i.v. for dogs. The concentrations of 0.002∼0.02 ㎍/mlwere used for the assay with guinea pig ileum. Intramuscular administration of CJC-50100 at the doses did not alter general behavior and the responses for central nervous system, smooth muscle, gastrointestinal system, cardiovascular and respiratory system, and water and electrolytes excretion. In summary, CJC-50100 had no pharmacological effect in these studies even up to the 100-fold of the expected clinical dose, 20 ㎍/man/60 kg.
페그-인터페론과 리바비린 병합치료 중 발생한 간질성 페렴 및 범혈구 감소증
서지현 ( Ji Hyun Suh ),한성환 ( Sung Hwahn Hahn ),이지은 ( Ji Eun Lee ),한진형 ( Jin Hyung Han ),김경묵 ( Kyung Mook Kim ),김도형 ( Doh Hyung Kim ),김윤섭 ( Yon Seop Kim ),박재석 ( Jae Suk Park ),지영구 ( Young Koo Jee ) 대한결핵 및 호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.70 No.1
The combination therapy of pegylated interferon and ribavirin is the mainstay of treatment for chronic hepatitis C patients. Anti-viral therapy is commonly associated with side effects such as headache, fever, myalgia, and arthralgia. However, anti-viral therapy can continue because these side effects are mostly mild and can be improved with supportive management. Anti-viral therapy should be stopped promptly if serious side effects, such as interstitial pneumonitis or hemolytic anemia occur, although those serious side effects are rare. There were a few case reports of interferon-related interstitial pneumonitis worldwide. In Korea, one atypical case report of interstitial pneumonitis has been reported, which followed the combination therapy of interferon-alpha and ribavirin in a patient with chronic hepatitis C. We present a case of interstitial pneumonitis and pancytopenia following the combination therapy of pegylated interferon and ribavirin in a patient with chronic hepatitis C.