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鄭炳柱 관동대학교 1987 關大論文集 Vol.15 No.2
A new method is described which makes use of the concept of a finite element and is thereby able to fined the points of seperation between the frame and the infill, as well as the stress distribution in the contact intervals, as an integral part of the solution. Slip between the frame and the infill is also taken into account by using modified friction elements. Infilled frame structures may, for a variety of these gaps on the behaviour of this structural from an investigation into the infilled frames with or without connectors are analysed by a finite element approach which takes into account nonlinearities of the materials and the structural interface. In order to predict failure and study the entire range of load-deflexion behaviour, cracking, crushing and nonlinearity of infill and yielding of frame are taken into account. The theoretical predictions have been compared with experimental results to demonstrate the varsatioity and accuracy of each analysis.
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소아 만성부비동염 환자에서 부비동 전산화단층사진으로 평가한 부비동 X - 선사진의 진단적 가치에 관한 연구
정병주,김규언,이기영,정승규,최옹식,박인용,이종두,김종수 대한천식알레르기학회 1990 천식 및 알레르기 Vol.10 No.2
Sinusitis is one of the important triggering factors of bronchial asthma and in nonasthmatic patients it can be the cause of night cough. Thus correct diagnosis and proper treatment of sinusitis is needed. PNS X-ray traditionally has been used to diagnosis of chronic sinusitis but the diagnostic accuracy is still devating. So we evaluated 34 patients who visited Yonsei University Pediatric Allergy Clinic during the period from April 1988 to August 1988 wih chronic respiratory symptoms for more than 2 months and diagnosed sinusitis by PNS X-ray. The patients were revaluated with PNS C T and cornpared it with PNS X-ray for the presence of sinusitis and its severity. The patients were subgrouped into allergic and nonallergic groups according to past history and allergy skin test results to evaluate the morphologic differences between the two groups. The results were as follows. 1. The severity of nasal mucosal edema in chronic sinusitis in both allergic and nonallergic groups was such that visualization of the midportion of middle turbinate was most often preeent. The most common nasal mucosal color was pale in allergic group and red in nonallergic group. The character of rhinorrhea was most often watery and scanty in allergic group but purulent and profuse in nonallergic group. 2. In the allergic group, there were more bilateral involvement and tendency for pansinusitia than nonallergic group. 3, Waters view and PNS C-T scan showed a 19.1% inconfidence rate in the diagnoais of maxillary sinusitis with a 39.1% difference in the severity. 4. Caldwells view and PNS C-T scan show- ed 20% inconfidence rate in the diagnosis of ethmoid sinusitis with 27.8% difference in the determining the severity. 5. Laterial view and PNS C-T scan showed 13. 3% inconfidence rate in the diagnosis of sphenoid sinusitis with a 42.9% difference in the determing the severity. PNS X-ray showed significant degree of disagreement in the diagnosis and determining of severity compared with PNS C-T scan. So, for the accurate diagnosis and in determining the severity of sinusitis PNS C-T scan is a useful diagnostic method
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Capsaicin이 고양이 피부의 기계적 수용체에 미치는 영향
정병주,백은주,홍승길 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.3
The present study was performed to investigate the effect of capsaicin on the pressure receptors and its innervating nerve fibers after applying the capsaicin to the skin or subcutis of the cat's paw. The results are summarized as follows: 1. Application of 0.05ml capsaicin (15gm%) to the skin induced to increase the threshold and decrease the conduction velocity of A-beta nerve fiber from pressure receptor. Injection of 0.05ml capsaicin(1.5gm%) into the subcutis induced to more increase the threshold and more decrease the conduction velocity of A-beta nerve fiber from pressure receptor than application to the skin. 2. Injection of 0.05ml capsaicin(1.5gm%) to the subcutis induced to more increase the threshold and more decrease the conduction velocity of A-delta nerve fiber from pressure receptor than A-beta nerve fiber. 3. After the application of 0.05ml capsaicin(15gm%) to the skin, the impulse discharges of A-beta nerve fiber to pressure stimuli increased initially by 8.3~19.2% to the peak discharge and later decreased by 13.2~24.3%. And in case of injection of 0.05ml capsaicin(1.5gm%) into the subcutis, it increased initially by 18.4~27.8% but decreased gradually and disappeared completely. 4. After the injection of 0.05ml capsaicin (1.5gm%) into the subcutis, the impulse discharges of A-delta nerve fiber to pressure stimuli increased initially by 33.2~54.8% but decreased gradually and completely disappeared after a shorter time than A-beta. According to above results, capsaicin seemed to depress the activity not only of nociceptors but also of simple pressure receptors. And it suggested that the general concept which explains that capsaicin would desensitize or degenerate the nociceptors or pain conducting fibers selectively should be reconsidered.
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