최대근력부하와 폭발적 근력부하에 의한 신경-근피로와 그 회복과정 비교 분석

유관호,이무연,이승훈,김민섭,육조영,임정일,임완기,김대경 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

The result which was gained from this study is as follows. From the conclusion of this study it was confirmed that resistant motion at high level strength brings about rise in density of lactate in blood at the same time decline of muscular power and generates acute fatigue of nerve-muscle accompanied by decline in electrical activity of muscle. On the other hand explosive loading produced fatigue at body center and decline in nervine-muscular activity particularly for men, In case of women explosive load did not produce fatigue in the same level as men and they were also quicker in recovery after exercise. Based on 2 types of loading method used in this study there was clearly difference in the process of restoration from resistant motion. For greater decline in muscular power and electromyogram activity more longer period of recovery was require.

정신분열병 환자의 가족부담 척도 개발에 대한 예비연구

김철권,조진석,서지민,김용관,김호찬,김현수,김상수,제영묘 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.3

연구목적 : 정신분열병 환자의 가족이 느끼는 부담을 측정하기 위한 가족부담 척도를 개발하기 위함이다. 방 법 : 200명의 정신분열병 환자 가족과의 비구조적 면담과 외국 부담척도 고찰을 통하여 94문항을 수집하였고 그 다음에 전문가들과 가족들이 문항 및 영역을 분류하고 통합하여 최종적으로 36문항을 선정하였다. 그리고 정신분열병 환자의 가족 135명, 불안장애 환자의 가족 22명, 기분부전장애 및 신체화 장애 환자의 가족 26명, 치매 환자의 가족 49명을 대상으로 신뢰도와 타당도를 검증하였다. 결 과 : 자료분석 결과 검사-재검사 신뢰도, 내적 일치도, 감별타당도 모두 높게 나타났으며, 요인분석을 통해 다섯 가지 구성요인이 추출되었다. 결 론 : 본 가족부담 척도는 정신분열병을 포함한 만성 정신질환을 앓고 있는 환자의 호전과 가족의 부담을 덜어주기 위한 다양한 프로그램의 효과를 검증하는데 유용하게 사용되어질 수 있을 것이다. Objectives : This preliminary study was carried out to develop the Family Burden Scale(FBS) of the schizophrenics. Methods : Ninety-four items were collected by interviewing in a free unstructured format with one relative of each 200 schizophrenic patients and reviewing foreign FBS's. Several professionals and relatives were asked to group and integrate them into several categories. Finally 36 burden items were chosen to constitute a FBS. The FBS was administered to the relatives of 135 schizophrenic, 22 anxiety disorder, 26 dysthymic disorder and somatization disorder, and 49 dementia patients for examining the reliability and validity. Results : The FBS showed high test-retest reliability, internal consistency, and discriminant validity. The results of the factor analysis revealed five-factor solution. Conclusion : The FBS can be used to evaluate the effectiveness of various programs intended not only to reduce decompensation among schizophrenics, but also to alleviate family burden.

零인 共形曲率텐서場을 갖는 ALMOST, NEARLY KAEHLER 多樣體

권정환,조관호,손원호 대구대학교 부설 과학교육연구소 1994 과학교육 Vol.7 No.-

10MgO-10Fe_2O_3-30Na_2O-5OSiO_2 유리의 Mo¨ssbauer 효과 연구

홍치유,박관호,백승도,문찬호,조수열 동국대학교 1987 論文集 Vol.26 No.-

The Mo¨ssbauer effect studies of the quenched glass and heat-treated glasses were performed. The Debye and Einstien temperatures of the quenched glass, determined using the center shift and kinetic temperature, are 540K and 430K respectively. The X-ray diffraction pattern showed that the heat-treated glasses were crystallized. Form the isomer shift of the heat-treated glasses, it was concluded that the Fe^(3+) ion is predominantly octahedrally coordinated.

A NOTE ON LOCALLY PRODUCT KAEHLE-RIAN METRICS WITH VANISHING CONFORMAL CURVATURE TENSOR FIELD

Cho, Kwan-Ho,Sohn, Won-Ho The Youngnam Mathematical Society Korea 1990 East Asian mathematical journal Vol.6 No.2

Torque Ripple Reduction of a PM Synchronous Motor for Electric Power Steering using a Low Resolution Position Sensor

Kwan-Yuhl Cho,Yong-Kyun Lee,Hyungsoo Mok,Hag-Wone Kim,Byoung-Ho Jun,Younghoon Cho 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6

MDPS (motor driven power steering) systems have been widely used in vehicles due to their improved fuel efficiency and steering performance when compared to conventional hydraulic steering. However, the reduction of torque ripples and material cost are important issues. A low resolution position sensor for MDPS is one of the candidates for reducing the material costs. However, it may increases the torque ripple due to the current harmonics caused by low resolution encoder signals. In this paper, the torque ripple caused by the quantized rotor position of the low resolution encoder is analyzed. To reduce the torque ripples caused by the quantization of the encoder signals, the rotor position and the speed are estimated by measuring the frequency of the encoder signals. In addition, the compensating q-axis current is added to the current command so that the 6th order torque harmonic is attenuated. The reduction of torque ripples by applying the estimated rotor position and the compensated q-axis current is verified through experimental results.

ON THE SPECTRUM OF THE p-LAPLACIAN ON COSYMPLECTIC MANIFOLD

Cho, Kwan-Ho,Kwon, Jung-Hwan,Pak, Jin suk 대한수학회 1996 대한수학회보 Vol.33 No.1

Let (M,g) be a compact manifold of dimension n with metric tensor g. Let △^p = dδ +δd be the Laplace-Beltrami operator acting on the space of smooth p-forms. Then we have the spectrum of △^p for each 0 ≤ p ≤n Spec^p(M,g) ={0 ≤ λ_1,p ≤ λ_2,p ≤... ↑ + ∞}, where each eigenvalue is repeated according to its multiplicity. Many authors[3,4,5,6] have studied relationship between the spectrum of M and the geometry of M. In[3], J. S. Park, J.- H. Kwon and K.- H. Cho studied the spectrum of the Laplacian and the curvature of a compact orientable cosymplectic manifold. In this paper, we shall prove :

Warfarin 사용 중에 발생한 급성 신부전증을 동반한 Purple Toe Syndrome 1예

조승연,한대석,조정호,강신욱,조영준,박효경,홍성관,이재훈,류동렬,이호영,최규현 대한내과학회 1999 대한내과학회지 Vol.56 No.2

Purple toe$quot; syndrome is an extremely rare complication of warfarin therapy. The occurrence of purple toe syndrome is characterized by a sudden appearance of purplish discoloration of toes and the sides of feet. The skin lesions usually develop 3-8 weeks after beginning anticoagulation. The pathogenesis was not clearly defined but the presence of atherosclerosis in most of patients led to suggest that the mechanism was related to cholesterol emboli from the atherosclerotic plaques and warfarin- induced bleeding into the plaques. These microemboli are commonly associated with irreversible organ dysfunction such as renal failure, distal gangrene, pancreatitis, and multifocal myocardial necrosis. Therefore purple toe syndrome may be considered as a sentinel of cholesterol crystal embolism. Once established, anticoagulation and thrombolysis are contraindicated. Necrosis and gangrenous changes may result in loss of limb and occasional mortality has been reported. We report a case of purple toe syndrome associated with acute renal failure after warfarin therapy with a review of literatures.

Effect of Woohwangchungsimwon on the Isolated Rat Hearts under Langendorff Apparatus

Cho,Ki-ho,Ko,Chang-nam,Cho,Kyu-seok,Lee,Kyung-sup,Kim,Young-suk,Bae,Hyung-sup,Moon,Sang-kwan INSTITUTE OF ORIENTAL MEDICINE KYUNG-HEE UNIVERSIT 1997 JOURNAL OF ORIENTAL MEDICINE Vol.2 No.1

The stenosis of the coronary artery may result in a decrease in the myocardial oxygen supply and cause ischemia and infarction. Woohwangchungsimwon as a drug of fragrance is generally regarded to have a recovery effects on patients who are unconscious and promotes the flow of Ki by warming the channel. The purpose of this experimental study is to study whether or not Woohwangchungsimwon is effective in changes of ischemia on isolated rat hearts under the Langendorff apparatus. Ischemia of the isolated rat hearts were induced in Langendorff apparatus by ceasing the perfused line for 20 minutes. The experimental group was divided into a orally administered normal saline group(control group), a 100mg of orally administered Woohwangchungsimwon group(Group A), a 300mg of orally administered Woohwangchungwimwon group(Group B), and a 1mg of injected Woohwangchungsimwon group(Group C). The heart rates, developed left ventricular pressure, myocardial dilation/contraction, cardiac blood flow measured and compared to assess the influence of Woohwanchungsimwon on the isolated rat heart's myocardial recovery ability after 20 minutes of ischemia. Results, 1. Heart rates were increased significantly in the 300mg of orally administered Woohwangchungsimwon group in comparison with the control group(P<0.01) on perfusion, and the 100mg of orally administered Woohwangchungsimwon group and the 300mg of orally administered Woohwangchungsimwon group in comparison with the control group(P<0.05, 0.01) on reperfuson. 2. Left ventricular pressure was increased significantly in the 100mg of orally administered Woohwangchungsimwon group and the 300mg of orally administered(p<0.01). Woohwangchungsimwon group(p<0.001) in comparison with the control group. 3. There were no differences in each group's abilities of myocardial contraction and the ability myocardial dilation. The 100mg of orally administered Woohwangchungsimwon group on perfusion was significantly higher than that of the control group(p<0.05). 4. Cardiac perfusion flow had no significant difference on perfusion and reperfusion in comparison with the control group(N.S.) 5. Lactic Dehydrogenase was significantly decreased in the 100mg of orally administered Woohwangchungsimwon group and the 300mg of orally administered Woohwangchungsimwon group(P<0.05). the injected Woohwangchungsimwon group<p<0.01) on perfusion. 6. Creatine Phosphokinase was significantly decreased in the 100mg of orally administered Woohwangchungsimwon group and the 300mg of orally administered Woohwangchungsimwon group, injection perfused group(P<0.001). Conclusion, Woohwangchungsimwon may have an effect on heart function recovery of the isolated rat hearts. Especially, the effect of Woohwangchungsimwon in the orally administered group is higher than that of Woohwnagchungsimwon injected group on perfusion.

ON THE SPECTRUM OF THE P-LAPLACIAN ON COSYMPLECTIC MANIFOLD

CHO, KWAN-HO,KWON, JUNG-HWAN,PAK, JIN SUK 경북대학교 위상수학 기하학연구센터 1995 硏究論文集 Vol.6 No.-