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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.
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
우상지(右上肢) 단마비(單痲痺)가 주증(主症)인 풍비 환자의 만금탕가미방(萬金湯加味方) 투여 호전 1례
정병주,우성호,김병철,김용호,서호석,황규동,장하정,남효익,김회영,김진원,Jeong, Byeong-Ju,Woo, Sung-Ho,Kim, Byung-Chul,Kim, Yong-Ho,Seo, Ho-Seok,Hwang, Gyu-Dong,Jang, Ha-Jeong,Nam, Hyo-Ick,Kim, Hoi-Young,Kim, Jin-Won 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.1
Background : Monoplegia is the paralysis of a limb. It is commonly caused by an injury to the cerebral cortex, and rarely caused by injury to the internal capsule, brain stem, or spinal cord. Most problems with cerebral cortex is derived from the occlusion of a brain cortex blood vessel due to thrombus or embolus. Objectives : This study is to see if there is a significance in thermal differences of acupoints in diagnosis and treatment of monoplegia on an upper extremity to test the validity of acupuncture and herbal treatment for it. Methods : By using Digital Infrared Thermographic Imaging(DITI), thermal differences$({\Delta}T)$ of acupoints on the upper extremity in a patient with monoplegia on the right upper extremity were measured after an attack of the disease. By giving Mangeum-tang(萬金湯) and treating the patient with acupuncture. the temperature changes of the upper extremity were examined through DITI and improvement was observed. Results : Compared with the left arm which suffered no such injury, the right recovered about 80% of sensation, and the grade of monoplegia improved from Grade O to Grade V. Also, the temperatures of right palmar-dorsal hand and the region of Weiguan(外關, Waiguan, TE5) were $1^{\circ}C$ and $1.45^{\circ}C$ higher than the same left region on admission day, but the thermal differences$({\Delta}T)$ narrowed to $0.5^{\circ}C$ by the last day. Conclusions : Results suggest that DITI screening is a reliable method of prognosis and that the time required for treatment can be estimated through this method in cases of monoplegia to an upper extremity. Also, progress in treatment is reflected in thermal differences of acupoints of the monoplegic upper extremity in accordance with the theory of meridian. This supports a role for acupuncture and herbal treatment for monoplegia.
정병주 한국농촌건축학회 2005 농촌건축 : 한국농촌건축학회논문집 Vol.7 No.19
In this paper, barrier panels against falling stones have been studied experimentally with various specimens. Test results show that stiffened barrier panels show more sufficient capacity than unstiffened barrier. Each type barrier panel can be used for various situations. New barrier panel is good for increasing strength and improving environment and maintaining cost down.
정병주,류동우,염병우 한국지질과학협의회 2023 Geosciences Journal Vol.27 No.4
An urban road collapse has become one of the significant geohazards frequently occurring in metropolitan cities worldwide. In most cases, these devastating superficial collapses are known to be induced by small underground cavities. They are created by the failure of subsurface structures and pipelines (e.g., water supply/sewer lines, subway tunnels). However, the cavity generation and expansion process, interacted by intense precipitation, groundwater movement, and subsurface geologic environment, is not yet fully understood. This study aims to understand the mechanism of cavity initiation and expansion using a numerical model coupling groundwater flow, poroelastic deformation, and internal soil erosion. The model is then applied to road collapse cases by a damaged sewer line failure and internal erosion. Effects of the precipitation rate and period on internal erosion are also investigated to predict potential risks for road collapse. Numerical simulation results show that the underground cavities are closely related to the focused groundwater flow by the leakage through an opening in the damaged pipeline. Internal erosion accelerates the removal of fine soil particles and creates collapsing-susceptible vacant areas. The results also show that intense precipitation in a short interval exerts the most damaging effects on the subsurface stability comparing other scenarios with less severe and continuous rainfalls.
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.