緯度와 地形에 따른 溫帶中部 溪谷植生의 種多樣性 및 群集構造에 關한 硏究

尹相旭,辛壽哲,郭東勳,金昌浩 동국대학교 농림과학연구소 1994 農林科學 論文集 Vol.18 No.-

This study was Carried out to analyse species composition, species diversity and structure and variation trends of vegetation, of Mt. Odae, Mt. Sobaek, and Mt. Juwang following various latitudes and topographies which were in middle temperate zone in Korea. Obtained results are as follows : 1. As a result of the simple discriminant analysis, soil texture Showed the highest high percent contribution of each environmental factor to the discriminant of Studred area. And Mt. Odae showed high content of sand while Mt. Juwang Showed silt. 2. Mean stem density showed highest value in Mt. Juwang and mean D. B. H. was Mt. Odae, and on phisiographic locations showd high values of stem density and mean D. B. H in slow slope area, nothern aspect area, and high elevation area, in order. 3. Species that showed the highest importance value in each canopy-subtree-shrub layer in study area were Quercus mongolica-Acer pseudo-sieboldianum-Lindera obtusiloba were in Mt. Odae, Betula platyphylla var. japonica-Styrax obassia-Deutzia parviflora were in Mt. Sobaek, and Pinus densiflora-Acer pseudo-sieboldianum-Lindera obrusiloba were in Mt. Juwang. 4. Species that showed the highest importance value in each canopy-subtree-shrub layer on the physiographic location were Quercus mongolica-Acer pseudo-sieboldianum-Lindera obtusiloba in high elevation and southern aspect, Carpinus laxiflora-Acer pseudo-sieboldianum-Lindera obtusiloba in high elevation and southern aspect, Carpinus laxiflora-Acer pseudo-sieboldianum-Lindera obtusiloba in nothern slope, Carpinus laxiflora-Styrax obassia-Lindera obtusiloba in low elevation, and Betula platyphylla var. japonica-Styrax obassia-Deutzia parviflora in high elevation. 5. According to decrease of latitudes with going down from Mt. Odae to Mt. Juwang, the more Number of species and individuals were increased, and the deversity index was the highest value in Mt. Sobaek, the evenness was in southern aspect, and the dominance was in high elevation. 6. As a result of Cluster analysis, the study area were divided into 4 groups, Carpinus laxiflora community, Styurax obassia community, Deutzia parviflora community, and Quercus mongolica community. 7. As a result of COA analysis, communities of the study area were divided into Betula platyphylla var. japonica community, Deutzia parviflora community, Quercus mongolica-Acer pseudo-sieboldianum community, and species were divided into 4 groups as the major, the disturbed, the waterside, and the fertile. 8. As results of the simple discriminant analysis and the linear regression, sand and silt content, slope aspect, total nitrogen content, and elevation among environmental factors had high percent contribution to classification and ordination of vegetation communities of the study area. 9. Major tree species had the unstable layer structure due to lower importance values of canopies and subtrees than those of shrubs, and Pinus laxiflora and Betula platyphylla var. japonica were on the decline phase due to very low dominance and absence of next generation. while, Styrax obassia and Acer pseudo-sieboldianum were sustanable layer structure as being distributed on all the crown layer.

五臺山 森林植生의 植物社會學的 硏究

尹相旭,金昌浩 동국대학교 농림과학연구소 1989 農林科學 論文集 Vol.13 No.-

This study was carried out to analyze the forest vegetational structure and the topographical distribution of trees in Mt. Odae national park. Eighteen sites, nine sites of the ridge part and nine sites of the glen part, were selected in the experimental forest of Mt. Odae. The result obtained are as follows : 1) Q. mongolica and Carpinus laxiflora showed the most high Importance Value in the ridge part and the glen part, respectively. For herbs, Arudinella hirta showed the most high Summed Dominance Ration in all the area, Festuca ovina the second high ratio in the ridge part, and Matteuccia struthiopteris the second in the glen part. 2) Species Diversity was most high in Plot 9 where was the intersection region of two vegetational types of the arid and the humid. Plot 10, the community of P. densiflora and Plot 16, the community of Carpinus laxiflora were completely different vegetational structure and topographical situation showing Similaraty Index of 0%. 3) As a result of analyzing Importance Values of each tree crown layers, thee age, D. B. H., succession of forest community of the area might be progressed toward Q. mongolica community in the ridge part and Carpinus laxiflora in the glen part for the present.

수리 방법에 따른 복합재 구조물의 인장강도 연구

윤상욱,정문규,박용빈,권진희,최진호,신상준,송민환,송근일 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

본 논문에서는 수리 방법과 결함크기가 복합재 구조물의 강도에 미치는 영향을 시험으로 연구하였다. 복합재 패치와 접착제의 종류, 결함크기를 달리하여 총 6종류, 30개의 시편에 대해 인장 시험을 수행하였다. 시험 결과, 복합재 패치로 수리된 시편의 파손하중은 건전한 적층판 대비 약 20% 정도 감소하였고 접착제 종류에 따른 영향은 크지 않았다. 유리직물을 사용하여 습식적층방식으로 수리한 경우의 파손하중은 결함이 없는 적층판의 파손하중보다 약 60% 감소하였다. 결함크기에 따른 파손하중의 차이는 발견되지 않았는데, 이것은 수리된 시편이 파손이 주로 결함 바깥 영역에서 인장파손의 형태로 발생하기 때문으로 판단된다. The effect of repairing method and defect size on tensile strength of composite structure was studied. A total of 30 specimens in 6 different types were tested with different composite patches, adhesive types and defect sizes. The results showed that the failure loads of composite patch-repaired specimens decreased approximately 20% compared to that of sound laminate. The effect of adhesive type was not remarkable. Decrease of the failure loads of the specimens repaired by glass fabric wet lay-up process is more serious in around 60%. The effect of defect sizes was negligible because critical failure occurred in the region outside the damage zone in tensile rupture mode.

五臺山演習林의 植物群集에 關한 硏究(Ⅰ) : 種組成 및 多樣性 Species Composition and Diversity

尹相旭,金昌浩,朴敎秀 동국대학교 생명자원과학대학 연습림 1993 연습림논문집 Vol.- No.3

This study was to provide the fundamental data for efficient reservation and management of the Mt. Odae experiment forest of Dongguk University. Obtained results are as follows : 1. As results of simple discriminant analysis, contents of silt and sand showed the most high contribution percent to the discriminant between each physiographic location, ridge and glen parts, steep and slow slopes, and high and low elevation, and among those locations steep slopes were the poorest soil condition. 2. By the community differential table the plant communities of this area are classified by Quercus mongolica―Acer pseudo―Sieboldianum―Rhododendron schlippenbachii community, Carpinus laxiflora―Styrax obassia―Lindera obtusiloba community, Pinus densiflora―Quercus serrata―Lespedeza spp. community, and 3 species groups that mainly appear in ridge part, glen part, and high elevation area, respectively. 3. Quercus mongolica showed the high importance value in ridge part, steep slopes, high elevation area, Carpinus laxiflora n glen part, and Pinus densiflora in low elevation area. 4. Glen part had more rich species than ridge part, and slow slopes was the area where had the the rich species among all the physiographic location. 5. As species diversity(H´) and evenness(J´) were the most high value in slow slopes and the most low one in ridge parts, it were closely related to the degree of inclination of slope, and dominance(1­J´) were the high value in glen parts.

高速道路 切開地 비탈면의 植生構造 分析

尹相旭,李敏渟,金昌浩 동국대학교 농림과학연구소 1988 農林科學 論文集 Vol.12 No.-

This study was carried out to analyze the vegetational structure of the express highway. Seven sites in roadside slopes of the Kyungboo express highway (the section Pankyo-Shingal) were selected and quadrats of three sizes, 25㎡, 5㎡, 1㎡, were set up for trees, blush, herbs, respectively. The results obtained are as follows; 1) For trees, R. pseudo-acacia showed the most high value, 45%, 39%, respectively in relative density and relative cover. Relative frequency was most high(31%) in P. rigida. Among invading species, Quercus spp. showed the most high value. For blush, Puerarica thunbergiana and Lespedeza bicolor showed very high value in R.D., R.F., and R.C. Arundinella was most high in R.D., R.F., and Miscanthus sinensis in R.C. for herbs. 2) In importance value, R. pseudo-acacia showed very high value over all polt. R. pseudo-acacia also showed markedly high value in phoytograph index, making the highest layer. 3) Species diversity was most high in Plot 2, the community of R. pseudo-acacia - Alnus hirsuta. Plot 1, the community of Quercus spp. - Alnus hirsuta, was most high in evenness. And dominance value was most high in Plot 5, the community of R. pseudo-acacia, showing the most low species diversity.

Pregnancy and Natural Delivery Following Magnetic Resonance Imaging-Guided Focused Ultrasound Surgery of Uterine Myomas

윤상욱,김경아,김상흠,하두회,이찬,이선영,정상근,김승조 연세대학교의과대학 2010 Yonsei medical journal Vol.51 No.3

This report discusses a pregnancy case following a series of two consecutive magnetic resonance imaging-guided focused ultrasound surgery (MRgFUS) procedures for the treatment of two different myomas in an individual patient. Both procedures were completed without adverse events, and the patient conceived naturally four months after treatment. At 39 weeks, she gave birth to a healthy baby girl, via a vaginal delivery. There were no complications in the pregnancy or during labor.

두개강내 종양의 자화전이영상 소견

윤상욱 대한영상의학회 1995 대한영상의학회지 Vol.32 No.4

Purpose : To measure the magnetization transfer ratio(MTR) of intracranial tumors and to evaluate thedifference of the character and the border of tumors on magnetization transfer image. Materials and Methods : Weprospectively reviewed magnetization transfer imaging(MTI) findings of intracranial tumors of 13 patients. 1.0TMRI machine was used. T1 weighted image(TR/TE=700/14) and T1 weighted magnetization transfer image were obtained.The offset and bandwidth of magnetization transfer pulse were 100Hz and 250 Hz, respectively. Postcontrast imageswere also obtained. MRT was measured at lesion area. Results : The mean of normal MTR of white matter and graymatter in 7 normal volunteers were 37% and 29%, respectively. The MTR of each tumor was as follows; metastatictumors(mean 16.3%), meningioma(mean 27.3%), oligodendroglioma(mean 20.2%), glomus jugulare tumor(mean 17.3%),gliomatiosis cerebri(mean 27.0%). The contrast of lesions were better at magnetization transfer image than at T1weighted image. Conclusion : The MTR of the intracranial tumors is lower than normal tissue. Measurement of MTR atmultple areas within the tumor can be useful for evaluation of indistinct border of the tumor.

유방확대성형술후 합병증 진단에 있어서 자기공명영상소견의 가치

윤상욱 대한영상의학회 1995 대한영상의학회지 Vol.32 No.4

Purpose : The objective of augmentation mammoplasty includes reconstruction and cosmesis after breast surgery.lncreasing frequency of the procedure has been related with increased complications. Authors evaluated the valueof breast MRI in the diagnosis of complications after augmentation mammoplasty. Materials and Methods : Authorsstudied 42 breasts of 24 patients, who had undertaken augmentation mammoplasty. We evaluated findings ofmammography, ultrasonography, and breast MRI in all patients. We used variable MRI sequences for better evaluationof implant status. The results were compared with the findings in surgical field. Results : In all imagingstudies, nodule or mass was indentifiable in the cases of interstitial paraffine injection(8 breasts),interstitial silicon injection(7 breasts), and herb medication(2 breasts). However, the differentitation betweenmalignant and benign nodule was only possible at dynamic breast MRI. Mammogram was not helpful in the evaluationof extracapsular rupture in the cases of silastic bag insertion. In sonogram, identification of echogenic materialwas possible, although, false negative and false positive rate were high. MRI was able to visualize contour ofentire implant and it was able to easily recognize low signal internal structure. Conclusion : MRI was the mostaccurate diagnostic tool in the evaluation of the character of the palpable mass after augmentation mammoplastyand early detection of breast implant rupture.

젊은 무증상 자원자의 배변조영술 소견

윤상욱 대한영상의학회 1994 대한영상의학회지 Vol.31 No.4

동축공기 수소확산화염에서 화염길이 스케일링

윤상욱,김문기,윤영빈 한국항공우주학회 2006 한국항공우주학회 학술발표회 논문집 Vol.- No.-