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정종안,정수미,노영만,전홍렬,안정조,전상윤,김희철,홍석,김성진,Jeong, Jong-Ann,Jeong, Soo-Mi,Roh, Young-Man,Jeon, Hong-Ryul,Ann, Jeong-Jo,Jeon, Sang-Yun,Kim, Hee-Chul,Hong, Seok,Kim, Sung-Jin 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.2
The purpose of this study is to present a case of gaze palsy due to thalamic infarction improved by acupuncture and herb medicine. Monocular gaze palsies which result from a supranuclear cerebral lesion are rare clinical manifestations. The pre-frontal cortico-oculomotor pathways travel across the thalamus and mesodienphalic junction terminating directly in oculomotor complexes. The acute disinhibition of these neurons by a posterior thalamic lesion results in a sustained but transient discharge of the medial rectus and tonic activation. Results of this study suggest a role for conservative therapy with herb medicine and acupuncture to treat gaze palsy due to thalamic infarction. Further research into oriental medical treatment for such disorders will be forthcoming.
고온.고습 환경에서 CFRP 적층재의 충격손상와 잔류강도
정종안,양인영,Jeong, Jong-An,Yang, In-Yeong 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.12
This study is to investigate experimentally relationships between the impact energy and moisture absorption characteristies vs.the residual bending strength with the variation of stacking seqences. When Carbon-fiber reinforced plastics(CFRP) impact-induced laminates are subjected to the high temperatures and hygrothermal effects, it is found that what CFRP laminates are impacted by a steel ball (5 mm in diametar) ; thus, the generated delamination is observed by the ultrasonic microscope. And the residual bending strength is evaluated by a three-point bending test. Also, a thermostat is used in test with the unimpacted and impacted specimens for the moisture experimentaiton. The percision electro lever scles is used to measure the moisture content(1/10, 000g).
정종안(Jong-An Jeong),David K. Hsu,임광희(Kwang-Hee Im) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.6
Conventional ultrasonic thickness measurement is to be considered as the assumption that the ultrasonic velocity is known. In actual applications the velocity is often not well known and access is often limited to one side. This paper aims at determining the ultrasonic velocity and thickness of plates with parallel or wedged surfaces using contact measurements made on one surface only. For wedged plates the thickness at one point and the wedge angle are determined. Equations are used for determining the ultrasonic velocity, thickness and wedge angle of the plate based on the times-of-flight measured by two contact transducers coupled to one surface. The time-of-flight of the obliquely reflected longitudinal wave echo was measured as a function of the separation between the two transducers. In addition, a simulation was made for comparing the experimental data and a FEM image. Experiments and simulations were performed on flat and wedged plates of aluminium materials; the calculated results for the unknown quantities are generally agreed with them to some degree.
과민성(過敏性) 대장증후군(大腸症候群)에 대한 문헌적(文獻的) 고찰(考察)
조윤성,정종안,홍광해,정경아,Cho, Yoon-Sung,Jung, Jong-An,Hong, Gwang-Hae,Jeong, Kyoung-Ah 대한한의학방제학회 2006 大韓韓醫學方劑學會誌 Vol.14 No.2
Objective & Methods : Irritable Bowel Syndrome is occurred frequently in daily life. Nevertheless. medical treatment of the Irritable Bowel Syndrome is almost dependent on western cure, but that cure is not effective enough. So we chose the oriental medicine textbook that were dealing with the oriental concept and the treatment of Irritable Bowel Syndrome. we got these results. Results were as follows : 1. Irritable Bowel Syndrome is characterised by recurrent or chronic abdominal pain, with distension, disturbed defecation and psychic problems without organic lesions. 2. The etiology of Irritable Bowel Syndrome include stress. disharmony of liver and spleen, the coldness of spleen and kidney and the lack of qi or yin, etc. 3. The oriental treatments of Irritable Bowel Syndrome are warming spleen and kidney, easing liver and stopping diarrhea. 4. The internal medication of Irritable Bowel Syndrome was the most used 11 times Tongsayobang(痛瀉要方) and 10 times Yijungtang(理中湯). 5. The most many used herb were Atractylodjs macrocephalae rhjzoma(白朮), Gjnseng Radix (人蔘), Cjnnamomj Cortex(肉桂), Polyporus(猪笭), etc.
김정호(Kim Jung Ho),정종안(Jeong Jong An),김지훈(Kim Ji Hoon) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.3
Carbon Fiber reinforced composite material can be designed for the optimized performances of structural member that have achieve appropriate mechanical properties with cross-sectional shape, fiber direction, stacking sequence and thickness. So there are needed extensive databases each optimal design of CFRP structural member by impact through the preparation of different shape, interface number, thickness and stacking angle. When pressure is applied to structural member, compression, bending and torsion is shown on the corresponding member. For the effective utilization of fiber reinforced composite material as main structural member, optimized design technology should be established to maximize mechanical properties for compression, bending and torsion. In this paper, CFRP prepreg sheet with different stacking angle is manufactured in CFRP and hybird(Al+CFRP) with circular cross-section. Strength and stiffness is gotten respectively by flexure test. CFRP structure and hybrid structure can be compared with each other. The best design guideline can be analyzed by use of this study result.