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정적연소기에서 토치의 노즐 직경에 따른 메탄의 연소특성 파악
이정만(Jung Man Lee),권순태(Soon Tae Kwon),박찬준(Chan Jun Park),엄인용(In young Ohm) 한국가시화정보학회 2010 한국가시화정보학회지 Vol.8 No.1
Five different size of orifice were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The initial flame development and flame propagation were analyzed by the mass burned fraction and combustion enhancement rate. The combustion pressures were measured to calculate the mass burned fractions and the combustion enhancement rates. In addition, the flame propagations were visualized by the shadowgraph method for the qualitative comparison. The result showed that the combustion pressure and mass burned fraction were increased when using the torch-ignition device. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage.
연결과 분리의 공간구성을 이용한 복합문화주거시설의 건축구상에 대한 연구
이정만(Lee, Jung-Man),김재욱(Kim, Jae-Wook) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.11
As the need to have shared space has increased, the objective of this study is to overcome the problems shown by the current community facilities, use the space structure of connection and separation as a way to increase the level of utilization and the cultural values, plan the combined cultural facilities equipped with the open-type space structure equipped with the character of public interest, establish the community facilities on the border with the residential facilities, and suggest the combined cultural residential facilities with continuous programs and flows of space. Based on the space application of connection and separation, it is possible to regard the connecting points of the programs built in the combined cultural residential facilities and provide the space continuity in order to induce organic connections. Also, by dividing the functions of the current programs, each program can be reproduced. In order to plan such space, such composing methods as SPLIT, WRAP, TOOTH, AROUND, STEP, SPIRAL, VOID and FOLD are suggested. Such methods can have different compositions according to directions, locations, approaching methods and functions in order to have differentiated space.
스킨스쿠버 참여자의 라이프스타일 여가몰입 여가만족간의 관계
이정만(Lee, Jung-Man),한진욱(Han, Jin-Wook),김태형(Kim, Tai-Hyung) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.1
The purpose of this study was to examine the relationships among lifestyle, leisure flow, and leisure satisfaction of skin scuba participants. Toward this end, a total of 253 skin scuba participants was selected using a convenient sampling method. 242 usable questionnaires were returned to the researchers. Data analyses were conducted for frequency analysis, exploratory factor analysis, reliability test, correlation analysis, descriptive analysis, and multiple regression analyses with PASW 18.0. The results of this study indicated that (1) health and achievement sub-dimensions of the life style had a significant effect on leisure flow, (2) leisure flow had a significant effect on team identification within on-line baseball game had a significant impact on leisure satisfaction, and (3) lifestyle had a significant effect on leisure satisfaction. Additional implications and directions for future research were discussed.
이정만(Jung Man Lee),김미이(Mi-Yi Kim),김동현(Dong Hyun Kim),이종일(Jong Il Lee),김기만(Ki-Man Kim),이영훈(Young Hoon Lee),김승호(Seung Ho Kim),박유석(Yu-Suk Park) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.4
The purpose of this research is to find the reasons of overcrowding in the emergency department of an hospital, then to shorten the total stay time of patients The fact that main causes of the overcrowding exist in the process of the emergency department was discovered by analysis of the data In order to Improve these process, simulation model was developed by ARENA 70 Staffs time, staffs organization, process ratio, and patient's waiting time were estimated in the simulation model in consideration of the decision of the patient's course of action Several scenarios such as the simplification of the process, the setup of dedicated pathology lab, and mixed method were suggested and evaluated Total stay time of the patients would be reduced up to 28.45%
이정만(Jung-Man Lee) 한국산업경영시스템학회 2015 한국산업경영시스템학회지 Vol.38 No.3
Recently, management based on statistical data has become a big issue and the importance of the statistics has been emphasized for the management innovation in the defense area. However, the Military Management based on the statistics is hard to expect because of the shortage of the statistics in the military. There are many military information systems having great many data created in real time. Since the infrastructure for gathering data form the many systems and making statistics by using gathered data is not equipped, the usage of the statistics is poor in the military. The Analytical Defense Statistics System is designed to improve effectively the defense management in this study. The new system having the sub-systems of Data Management, Analysis and Service can gather the operational data from interlocked other Defense Operational Systems and produce Defense Statistics by using the gathered data beside providing statistics services. Additionally, the special function for the user oriented statistics production is added to make new statistics by handling many statistics and data. The Data Warehouse is considered to manage the data and Online Analytical Processing tool is used to enhance the efficiency of the data handling. The main functions of the R, which is a well-known analysis program, are considered for the statistical analysis. The Quality Management Technique is applied to find the fault from the data of the regular and irregular type. The new Statistics System will be the essence of the new technology like as Data Warehouse, Business Intelligence, Data Standardization and Statistics Analysis and will be helpful to improve the efficiency of the Military Management.
점막하 침윤 조기위암 환자에서 VEGF-C와 COX-2 발현의 임상적 의의
조윤정,이정의,이관주,박조현,박승만,전해명,안창준,김정구,이동호,이상철,Cho, Yun-Jung,Lee, Jung-Uee,Lee, Kwan-Ju,Park, Cho-Hyun,Park, Seung-Man,Jeon, Hae-Myung,Ahn, Chang-Joon,Kim, Jeong-Goo,Lee, Dong-Ho,Lee, Sang-Chul 대한위암학회 2009 대한위암학회지 Vol.9 No.3
목적: Vascular endothelial growth factor (VEGF)-C와 -D 및 Cyclooxygenase (COX)-2는 위암에서 림프절 전이와 연관이 있다고 알려져 있다. 이에 저자들은 점막하 침윤 조기위암에서 VEGF-C와 -D 및 COX-2의 발현과 림프절 전이 등을 포함하는 다양한 임상병리학적 인자와의 관련성을 알아 보고자 하였다. 대상 및 방법: 1991년 1월부터 2007년 10월까지 본원에서 점막하 침윤 조기위암으로 수술을 시행 받은 85명의 환자를 대상으로 VEGF-C, -D 및 COX-2와 VEGF-C에 대한 면역 조직화학 염색을 시행하였다. 염색의 결과에 따라 환자군을 나누어 다양한 임상병리학적 인자와의 연관성을 조사하였고, 또 이 세 가지 인자들 상호 간의 연관 관계를 분석하였다. 결과: 전체 85명의 환자 중 16명이 림프절 전이가 있었다(18.8%). VEGF-C는 34.1% VEGF-D는 22.3% 그리고 COX-2는 37.6%가 양성으로 판정되었다. 이 중 VEGF-C와 COX-2 모두 림프절 전이와 유의한 상관관계를 보였고(P<0.001, P=0.023). VEGF-D와 연관성을 보이는 인자는 확인하지 못하였다. 또 VEGF-C와 COX-2의 발현은 밀접한 상관관계를 보였다(P=0.001). 결론: 점막하 침윤 조기위암에서 VEGF-C와 COX-2는 림프절 전이와 연관이 있고, 따라서 이 두 인자가 점막하 침윤 조기위암의 림프절 전이를 예측하는 인자로서의 가능성이 있다고 할 수 있겠다. Purpose: Lymph node metastasis is an important factor in determining prognosis and therapeutic options for early gastric cancer (EGC) patients. Vascular endothelial growth factor (VEGF)-C and D are known as lymphangiogenic factors, and cyclooxygenase (COX)-2 is thought to play a role in lymph node metastasis in gastric carcinoma. This study was designed to determine whether the expression of VEGF-C, VEGF-D, and COX-2 is associated with clinicopathologic factors, especially lymph node metastasis in EGCs invading the submucosa. Materials and Methods: Tissue samples were obtained from 85 Patients undergoing standard gastrectomy with lymph node dissection between 1991 and 2007 in the Department of Surgery of Daejeon St. Mary's Hospital in Daejeon, Korea. All patients were diagnosed with gastric cancers and submucosal invasion. We examined the expression of VEGF-C, VEGF-D, and COX-2 using immunohistochemical methods. Results: Of the 85 patients, 16 (18.8%) had lymph node metastasis. VEGF-C, VEGF-D, and COX-2 were positively expressed in 34.1% (29/85), 22.3% (19/85), and 37.6% (32/85) of the patients. VEGF-C and COX-2 expression was significantly correlated with lymph node metastasis (P<0.05). A positive correlation existed between VEGF-C and COX-2 expression (P< 0.001). Conclusion: VEGF-C and COX-2 expression is associated with lymph node metastasis in gastric cancer with submucosal invasion. VEGF-C and COX-2 may thus be predictive markers for lymph node metastasis in EGC patients with submucosal invasion.