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비등방성 투수계수를 갖는 점토지반에 대한 압밀촉진 케이슨 기초공법의 효율성
조남준,황성일 국민대학교 생산기술연구소 2003 공학기술논문집 Vol.26 No.-
The feasibility of caissons for accelerating consolidation (C.A.C.) constructed in marine clays with anisotropic permeability has been presented in this paper. By considering anisotropic permeability, this study provides analytical solutions for excessive pore water pressures of two-dimensional consolidation equation and average degrees of consolidation with varying time factors. With varying anisotropic permeability ratios of 5, 10, and 50, consolidation times required for reaching the average degree of consolidation of 90% for C.A.C. at the section of ξ= 0.1 are shorter than those for conventional caissons by 8, 13, and 47 times, respectively. C.A.C. is more effective in reducing consolidation time as anisotropic permeability ratio increases. Also plots for average degrees of consolidation versus the width to depth ratios of analyzed sections and permeability ratios, which will enable engineers to determine easily average consolidation settlements, are given in this study.
유해·위험물질 취급 화학실험실 관리 기준 정립 및 체계 개선에 관한 연구
조남준,이만수 대한안전경영과학회 2016 대한안전경영과학회지 Vol.18 No.4
There are more than 30,000 chemical substances handled in domestic university laboratories. Among them, hazardous materials are selected and managed as designated substances by the standards of 19 Ministries and 16 Acts. However, domestic safety-related laws and regulations are used to manage industrial risk factors based on industrial activities. In case of installing a university chemical laboratory in accordance with the installation standards applicable to general workplaces. It is not suitable to use as a laboratory installation standard that can be applied to a chemical laboratory installed at a university such as a problem occurs in applying to a university using a small quantity of dangerous substances in a small amount. In order to establish the laboratory structure and facility standards that are appropriate for the laboratory characteristics and apply systematic laboratory safety, the National Security Administration shall apply the special handling standard of chemical experiment to places where handling less than 30 times the designated quantity of chemical substances for chemical experiments. On August 2, 2016, the regulations for the enforcement of the Dangerous Goods Safety Management Act and the standards for the structure and facilities of the university chemical laboratory were enacted. In this study, we investigated the domestic chemical substances laws and regulations to determine the chemical substances that are over-regulated in the relevant laws, and define them as substances against accidents. The management criteria for the substances were analyzed. The R value for the designation of the designated quantity by the concept of the space in the management standard was calculated.
Ixodes nipponesis에 의한 참진드기 교상 2예 - 주사전자 현미경적 관찰 -
조남준,방동식,조백기,오영진,이원구 ( Nam Joon Cho,Dong Sik Bang,Baik Kee Cho,Young Jin Oh,Won Koo Lee ) 대한피부과학회 1991 대한피부과학회지 Vol.29 No.4
Two Cases of Tick Bites Caused by Ixodes Nipponensis -Scanning electron microscopic study- Nam Joon Cho,M.D.,Dong Sik Ban, M.D., Bailk Kee Cho, M.D*., Young Jin Oh,M.D.,* Won Koo Lee, Ph.D.** Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea Department of Dermatology, Catholic University Medical College*, Seoul, Korea Department of Biology, College of Science, Chonbuk National University**, Chonju, Korea We report two cases of tick bites caused by Ixodes nipponensis. One patient was a 10-month-old female who developed a protruding mass and tiny bleeding on forehead for about one week. The other was a 5-year-old female who had had a tick on occipital area for an unknown period. A excision biopsy specimen from the skin lesion of the latter case showed mild inflammatory cells in the dermis and dense inflammatory cells mainly composed of neutrophils in the subcutaneous fat. The two ticks were identificated as Ixodes nipponensis by scanning electron microscopic study. (Kor J Dermatol 29(4) : 533-537, 1991)
조남준,남보다,박삼엘,김형래,노현진,전진석,Han Dong Cheol,Lee Eunyoung,길효욱,권순효 대한신장학회 2022 Kidney Research and Clinical Practice Vol.41 No.1
Background: An increased pericoronary fat attenuation index (FAI) on computed tomography angiography (CTA) is associated with increased all-cause and cardiac mortality in the general population. However, the ability of pericoronary FAI to predict long-term outcomes in chronic kidney disease (CKD) patients is unknown. Methods: In this single-center retrospective longitudinal cohort study, we assessed the utility of CTA-based pericoronary FAI measurement to predict mortality of CKD patients, including those with end-stage renal disease (ESRD). Mapping and analysis of pericoronary FAI involved three major proximal coronary arteries. The prognostic value of pericoronary FAI for long-term mortality was assessed with multivariable Cox regression models. Results: Among 268 CKD participants who underwent coronary CTA, 209 participants with left anterior descending artery (LAD) FAI measurements were included. The pericoronary FAI measured at the LAD was not significantly associated with adjusted risk of all-cause mortality (hazard ratio [HR], 2.08; 95% confidence interval [CI], 0.94–3.51) in any CKD group. However, ESRD patients with elevated pericoronary FAI values had a greater adjusted risk of all-cause mortality compared with the low-FAI group (HR, 2.26; 95% CI, 1.11–4.61).Conclusion: The pericoronary FAI measured at the LAD predicted long-term mortality in patients with ESRD, which could provide an opportunity for early primary intervention in ESRD patients.
발진성 , 결절성 , 수장선상 황색종을 동반한 제 III형 과지질단백혈증
조남준,유욱,김정호,이승헌 ( Nam Joon Cho,Wook Lew,Jeong Ho Kim,Seung Hun Lee ) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.2
We report a case of type Ⅲ hyperlipoproteinemia associated with xanthoma eruptivum. xanthoma tuberosum, and xanthoma striatum palmare whose clinical symptoms have been improved by the treatment of gemfibrozil. A 31-year-old male patient visited our clinic for evaluation of multiple yellowish nodules on the elbows, multiple yellowish papules on the buttocks and linear yellowish palques along with the palmar creases on both palms. The blood chemistry showed an elevation of cholesterol and triglyceride. Lipoprotein electrophoresis showed broad β zone and plasma standing test showed turbid plasma. Lipoprotein ultracentrifugation showed that the ratio of VLDL cholesterol and plasma triglyceride was 0.38. According to the above findings, we diagnosed this patient as type Ⅲ hyperlipoproteinemia. Afer 4 months of treatment with diet and gemfibrozil, the serum level of cholesterol and triglyceride were reduced to normal range. The skin lesions of both palms showed marked improvement but the skin lesions on elbows and buttocks were not much improved. .(Korean J Dermatol 1994;32(2):321-326)
조남준,Kulhawy, Fred H. 한국지반공학회 1995 지반 : 한국지반공학회지 Vol.11 No.3
현장타설말뚝기초가 보다 빈번하게 여러가지 구조물의 기초로 쓰이고 있다. 그러나, 경사하중하의 현장타설말뚝의 거동에 대하여는 알려진 사실이 거의 없다. 본 연구에서는, 경사하중을 받는 현장타설말뚝의 비배수거동에 대하여 연구하고자 체계적인 실험을 행하였다. 기초의 직경에 대한 깊이의 비와 하중의 경사도가 같은 변수들을 변화시키면서 행한 연구를 통하여 경사하중에 대한 지지력을 예측하는 반이론적 방법을 개발하였다. 시험변수들은 실제 송전탑건설시 가장 빈번하게 사용되는 대표적인 값들과 같도록 선택되었다. 직경에 대한 말뚝의 깊이비(D/B)가 서로 다른 짧은 강체말뚝에 대하여 논하였으며, 축방향 인발, 경사 인발, 그리고 경사 압축등과 같은 하중상태에 대하여 연구하였다. 경사지지력을 구조상호작용 방정식과 본 실험연구에서 개발한 공식을 사용하여 평가하여 보았다. 본 연구에서 개발한 새로운 공식은 실험실 시험치와, 제한적이나마, 현장의 실제시험치에 적용될 수 있음을 알 수 있었다. Drilled shafts are used increasingly as the foundations for many types of structures. However, very little knowledge of drilled shaft behavior under inclined load is available. In this study, a systematic experimental testing program was conducted to understand the undrained behavior of drilled shaft foundations under inclined loads. A semi-theoretical method of predicting the inclined capacity was developed through a parametric study of the variables such as shaft geometry and load inclination. Test parameters were chosen to be representative of those most frequently used in the electric utility industry. Short, rigid shafts with varying depth/diameter(D/B) ratios were addressed, and loading modes were investigated that includes exial uplift, inclined uplift, and inclined compression loads. Capacities were evaluated using the structural interaction formula and an equation developed from this experimental study. This new equation models the laboratory data well and is applicable for the limites field data.