沿岸施設物의 安定性 및 機能解析에 關한 硏究

柳演善,柳靑魯 釜山水産大學校 1987 釜山水産大學 硏究報告 Vol.27 No.1

The purposes of this paper are to identify the existing state-of-the-art and to present the synthetic review and critical discussions on the analyses of coastal structures. Various methods or procedures which are currently used for the analyses of stability and functions are reviewed to define the applicability of empirical/experimental formulas and theoretical results. From the study, a useful monograph on the stability and function analyses of coastal structures is made.

항만 고유진동 해석을 위한 유한요소법의 응용

류연선,이병걸 釜山水産大學校 1985 釜山水産大學 硏究報告 Vol.25 No.2

Usability of the finite element method in the free oscillation analysis of a harbor is investigated. For a numerical solution of the governing Helmholtz equation, a finite element equation is formulated using the Galerkin's method. A numerical example is presented. The results are reasonable compared with the analytic solution, hence it shows the effective applicability of the finite element technique in the harbor oscillation problems, Also, it is found that the finite element method can be generally used for the free oscillation analysis of arbitrarily-shaped harbors with variable depths.

非線型 構造의 最適設計시스템에 關한 基礎的 硏究

柳演善 釜山水産大學校 1987 釜山水産大學 硏究報告 Vol.27 No.1

Anonlinear structural optimization system is conceptually designed and its features are discussed. Six major component modules of the system are identified on the basis of their operational tasks. The modular sysem is then designed so that data communications between modules take place through a database with the aid of database management program. In the design of the system, availability of nonlinear finite element structural analysis programs and numerical optimization algorithms for the mathematical programming problems is assumed. Based on the present study, a general-purpose nonlinear structural optimization system can be developed with the favorable features of versatility and portability. It is also found that any new analysis codes or optimization algorithms can be easily incorporated or replaced in the system as the total independence of modules is assured.

일부 미용업사자의 건강증진행위 실천도와 관련요인

임진주,유선미,류소연,박종 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.1

Background and Objectives:This study identified the performance degree of health promotion behaviors of the workers who are engaged in beauty business, and related factors in order to obtain basic data for development of health promotion program and health education. Method: This study targeted 103 hair dressers and 100 skin specialists who work in Gwangju, and they were interviewed using questionnaire with short answer questions in October 2003. The data collected were analysed using the following devices: descriptive statistics, t-test, ANOVA, Pearson's correlation analysis, and multiple-regression analysis. Results: 1. Health promotion behaviors had 2.76±0.95 when total score was four, which indicated that they had a relatively good management of health promotion behaviors. When specified health promotion behaviors were examined, self-realization had the highest score(2.98±0.58), and exercise had the lowest score(2.03±0.75). 2. When health promotion behaviors of the subjects were examined, there was a statistically significant difference depending on age(P=.025), marriage (P=.000), Position(P=.027), smoking(P=.041), and dhnking(P=.006). 3. It was found that the lower occupational stress of the subjects(r=-0.22, P=.001), the higher the social support(r=0.24, P=.001), and the higher se1f-efficacy(r=0.39, P=.000), the better health promotion behaviors. 4. The predicting factors of health promotion behaviors were smoking, drinking, social support, and self-efficacy, and they explained for 38.1% of health promotion behaviors, Conclusion: Health promotion behaviors of the workers who are engaged in beauty business were affected by various factors. Therefore, in developing future health promotion programs, a careful consideration to reduce stress caused by work and behaviors harmful to health should be given. And to encourage health promotion behaviors, socio-psychological approach through enrichment of social support and self-efficacy should be applied.

요로결석 환자의 체외충격파쇄석술 치료경과와 결석 특성과의 관련성

김성길,김기순,류소연,한미아,이선옥,노준 朝鮮大學校 附設 醫學硏究所 2009 The Medical Journal of Chosun University Vol.33 No.S

요로 결석에 대한 비 침습적 치료 방법인 체외충격파쇄석술에 의한 치료경과와 결석 특성과의 관련성을 파악키 위해 2002년 12월부터 2008년 3월까지 G시 H병원에서 요로 결석으로 진단되어 체외충격파쇄석술을 받은 33l례를 대상으로 의무기록 자료를 이용하여 분석한 결과는 다음과 같다. 1. 조사 대상자 331례중 남자는 68.6%, 여자는 31.4%이었으며 평균연령(표준편차)은 44.2 (13.9)세 이었고 84%가 G시내 거주자였다. 2. 조사 대상자에게 시행된 체외충격파쇄석술의 평균 시술횟수(표준편차)는 1.9(1.5)회 이었으며 평균 통증제거기간(표준편차)은 3.2(2.1)일 이었고 요로결석 진단 시로부터 치료가 완료되었다고 의사가 판정했을 때까지의 치료기간의 평균(표준편차)은 10.3(8.4)일 이었다. 3. 시술횟수에 통계적으로 유의하게(P<0.01) 관련된 요인은 결석크기, 결석의 방사선 투과성, 요관 폐색여부 이었으며 모형의 설명력은 13.5%이었다. 4. 통증제거기간에 통계적으로 유의하게(P<0.01) 관련된 요인은 결석의 방사선 투과성 이었으며 모형의 설명력은 7.4%이었다. 5. 치료기간에 통계적으로 유의하게(P<0.01) 관련된 요인은 결석크기와 결석의 방사선 투과성 이었으며 모형의 설명력은 13.5%이었다. 따라서 결석의 크기가 크거나 결석이 방사선에 비 투과성일 때, 요관이 폐색되어 있을 때 치료경과가 늦게 됨으로 이러한 사실을 참고 하여 추후 진료지침을 작성 시 보다 효과적이고 효율적인 치료법을 적용할 필요가 있다고 판단되며 보다 체계적인 평가와 연구가 필요할 것이다. Objectives & Methods: To find the treatment process by extracorporeal shock wave lithotripsy (ESWL) and its related stone characteristics in urinary tract stone patients, an analysis was done from medical records of 331 cases who were treated by ESWL from December 2002 to March 2008 at H hospital in G city. Results: Among 331 study subjects 68.6% were male and 31.4% were female. Their mean age (standard deviation, SD) was 44.2 (13.9) years old and 84.0% lived in G city. Average frequency of ESWL done toward study cases were 1.9±1.5 times. Mean duration of disappearance from pain was 3.2±2.1 days and total treatment period for a stone was 10.3±8.4 days. Statistically significant (p<0.01) stone and urinary tract characteristics related with frequency of ESWL were stone size, radio-opacity of the stone, and obstruction of urinary tract. The model composed of these 3 independent variables explained 13.5% of frequency of ESWL. Statistically significant (p<0.01) variable related with disappearance from pain was radio-opacity of the stone, and this model explained 7.4%. Statistically significant (p<0.01) variables related with treatment duration due to stone were stone size and radio-opacity of the stone. These two variables explained 13.5%. Conclusion: The bigger the size of stone are, the slower the treatment process will be. And when the stone is radio-opaque and urinary tract is obstructed, the treatment process will be slower than stone is radio-luscent and urinary tract is not obstructed. So to make effective and efficient treatment manual for ESWL, above fact must be considered and continuous systematic evaluation and research toward ESWL are necessary.

건강가정지원센터 가정생활교육 프로그램 운영 및 성과 : 용산구·숙명여자대학교 시범사업을 중심으로

김명자,계선자,박미석,장진경,김연화,한은주,류진아 한국가족관계학회 2005 한국가족관계학회지 Vol.10 No.1

The purpose of this study is to propose a model for service programs and management strategies for the division of family education in Healthy Families Center. For the purpose, the researchers find out demands for the family education programs of people in Yong-San Gu, Seoul, exam the effect of each family education program of Yong-San Gu & Sookmyung Women's University Healthy Families Center from June to December, 2004. According to the results, people in Yong-San Gu need economic education service mostly, and they want to study at Saturday afternoon. The programs show positive effect on the improvement of family health.

LT, Others : PE-133 ; A case of hepatic hemangioma appearing atypical finding confirmed by dynamic MRI in patients with high risk of hepatocellular carcinoma

( Dong Won Park1 ),( Soo Hyung Ryu1 ),( Myung Ki Oh ),( Seong Yeon Jeong ),( Kyeong Sam Ok ),( Jae Chan Shim ),( Jin Nam Kim ),( You Sun Kim ),( Jeong Seop Moon ) 대한간학회 2012 춘·추계 학술대회 (KASL) Vol.2012 No.-

Background: Hemangioma is the most common benign hepatic tumor. Many hepatic hemangiomas tend to be found incidentally, but should be differentiated from malignant tumors. We report an interesting case of hepatic hemangioma in patient who has high risks of hepatocellular carcinoma. Case: A 52-year-old woman, who was a chronic alcoholic abuser and hepatitis C virus carrier with no treatment experience, was admitted due to diarrhea. The patient had suffered from intermittent abdominal pain in the right subcostal area for recent 3 months. Also the patient had easy bruising and frequent epistaxis. She had used oral contraceptives for almost 20 years. Systolic blood pressure was 160 mmHg and diastolic blood pressure was 80 mmHg. Body temperature was normal. Physical examination revealed icteric sclerae and tenderness in right upper quadrant of the abdomen. Laboratory study showed platelet count of 31,000/ul, AST/ALT of 302/127 IU/L, and total bilirubin of 2.7 mg/dl. 3-phased contrast-enhanced abdominal computed tomography (CT) revealed a 4 cm × 4 cm sized hepatic mass involving both segment 5 and 6. Abdominal CT finding suggested hepatic hemangioma, however, typical finding of hemagioma was unclear, therefore, could not rule out the malignancy. Since she had risk factors for hepatocellular carcinoma, abdominal ultrasonography was performed for further evaluation. But abdominal ultrasonography also showed atypical finding. The confirmative diagnosis could be done by dynamic magnetic resonance imaging (MRI) using primovist®, which is an innovative liver cell-specific contrast medium. Dynamic MRI presented peripheral globular enhancement and a centripetal fill-in pattern, confirmatory findings of hepatic hemangioma, on the delayed image. The patient got relief from abdominal pain and diarrhea during admission, now is being followed-up at a general out-patient clinics. Conclusions: Hemangiomas with atypical abdominal CT and ultrasonographic findings in patients with high risks of hepatocellular carcinoma can be easily characterized with primovist-enhanced dynamic MRI.

Comparison of NR and BFGS Methods for the Nonlinear Structural FE Equations

RYU, Yeon-Sun,YOON, Gil-Su 釜山水産大學校 1986 釜山水産大學 硏究報告 Vol.26 No.1-2

본 논문에서는 비선형구조해석을 위한 비선형 유한요소 방정식의 해법 중 NR법과 BFGS법의 기본과정을 서술하고 간단한 수치예를 통하여 각 방법의 계산과정상의 특성을 비교 고찰하였다.

A Performance Review of Metaheuristic Algorithms for the Structural Design Optimization

Ryu, Yeon-Sun 대한토목학회 2016 대한토목학회 학술대회 Vol.2016 No.10

LRFD-Based Design Optimization of Steel Box Girder Sections Using Genetic Algorithms

Yeon-Sun Ryu,Je-Heon Kim,Hyun-Man Cho,Jeong-Tae Kim 대한토목학회 2002 KSCE journal of civil engineering Vol.6 No.2