췌장의 가성낭종 파열에 의한 하부 위장관 출혈 1예

장성종,김병수,부귀범,김동규,박찬국,김만우,김정용,박상헌 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1

Pancreatic pseudocysts usually develop as a complication of acute pancreatitis or repeated attacks of chronic pancreatitis. Pseudocysts may also develop as a result of traumatic injuries or neoplasms. An uncommon complication is massive hemorrhage inside the pancreatic pseudocyst. The exact mechanism of hemorrhage is unknown. Enzymatic digestion, pressure erosion from the cyst mass or a combination of these processes may play an important role. Gastrointestinal hemorrhage associated with a pancreatic pseudocyst can occur in 10 percent of cases. When hemorrhage occurs because of erosion into a blood vessel involved in the pseudocyst, surgery is indicated since the episodes of hemorrhage are often severe and may even be fatal. When there is colonic involvement, various complications may occur. The most dangerous one is spontaneous rupture into the colon, which requires immediate surgical treatment because of high incidence of fulminating sepsis or massive hemorrhage. We examined a sixty eight-year-old man complaining of hematochezia and dizziness, and reported that it was a case of massive lower gastrointestinal hemorrhage caused by pseudocyst of the pancreas ruptured into the colon associated with chronic pancreatitis. On operative findings, the peripancreatic fatty tissue had severe adhesions to transverse colon and tail portion of pancreas, where the pseudocyst had formed. A distal pancreatectomy, splenectomy and resection of transverse colon were performed. By microscopic examination, hemorrhagic necrosis and inflammatory change were observed in the pancreas specimen. The tail portion of pancreas had a 6×6 cm sized cystic mass and was proven to be a pseudocyst with no epithelial lining.

랜덤한 수명주기를 갖는 소프트웨어의 NHPP모형에 기초한 최적방출정책

김상부,김진욱 國立 昌原大學校 産業技術硏究所 1989 産技硏論文集 Vol.3 No.-

새로운 소프트웨어 시스템이 개발되었을 때 개발된 소프트웨어의 오류를 제거하기 위해 미리 정해진 시간까지 시험을 하게된다. 본 논문은 소프트웨어가 랜덤한 수명주기를 갖는 경우 Goel-Okumoto NHPP모형에 기초한 최적 소프트웨어 방출시간을 정하는 문제를 다루었다. 최적화 기준은 전체 기대 이익을 최대화 하는 것이며, 이때 구한 최적방출시간 T가 유한하며 유일함을 보였다.

대용특성을 이용한 측정시스템 분석

김주환,장무성,김상부 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-

Since 1996, many Korean companies such as Samsung, LG, Hyundai Motor Company, have adopted Six Sigma in order to get a competitive edge in the global marketplace. There are, however, many problems to be solved for successfully implementing Six Sigma in an organization. As is known, one of the key principles of Six Sigma is a data-based management or a decision making based on data. Therefore, Six Sigma requires more measurement than ever, which makes measurement system analysis more important. Usually, a gage R&R study is performed to identify the measurement system's variation relative to process variation. In the study, a gage R&R study is considered for the case where measuring a major quality characteristic accompanies a destructive testing. We suggest a gage R&R study using a screening variable that is highly correlated with the major quality characteristic and also can be measured by a nondestructive testing method. It is assumed that the major quality characteristic and a screening variable have a bivariate normal distribution. A simulation study on the proposed method is performed and we compare it with the conventional gage R&R study for a destructive testing.

응급센터내에서의 Do-Not-Resuscitate Order

김영식,황성오,이부수,안무업,임경수,강성준 대한응급의학회 1993 대한응급의학회지 Vol.4 No.2

Do-not-resuscitate(DNR) decision in certain patients is a important part of patient management. The use of DNR order has been widely recognized in hospitalized patients, but there has been little discussion of the use of DNR order in emergency department. DNR decision in emergency department is difficult because there is no previous contact between physician and patient. To identify the medical reasons of the DNR decision and the process of the DNR in the emergency department, 293 DNR patients in emergency department during 1 year and 36 physicians having experienced DNR decision were studied. Reasons for DNR are irreversible states from brain damage or acute illness(63%), chronic irreversible illness(15%), prolonged cardiac arrest over 30 minutes(16%), physical injuries including decapitation(1%) and family's hope(5%). Almost DNR(72%) were decided by physicians. 72% of DNR decision were not documented. Cardiopulmonary resuscitation was attempted before DNR decision in 38% of the patients and 17% of CPR attempts were unnecessary. Almost physician(88%) replied that physician should discuss resuscitation with family and process of DNR decision should be documented.

임파워먼트의 실현 방법에 관한 연구

김상부,황구주 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-

The implementation process of empowerment, which was first introduced to western companies as a business strategy, is considered. When implementing empowerment in a company, corporate culture and the organizational environment should be taken into account. Differences between western and Korean corporate cultures are studied and negative aspects of implementing empowerment are presented. Furthermore, the empowerment process for a Korean electronic company is developed.

사람 YB-1 유전자의 프로모터에 결합하는 핵인자에 관한 연구

김유리,한상원,류필열,김경근,안봉환,신부안 全南大醫大 2001 전남의대학술지 Vol.37 No.1

체육고등학교 지도자 리더십 유형에 대한 선수들의 인지도와 선호도

김진성,부기원 江原大學校附設體育科學硏究所 2002 江原大學校附設體育科學硏究所論文集 Vol.- No.25

The purpose of this study was to find a teaching medel for each sports and to develop efficient management skill of sports organization, based upon results of the analysis of leadership style and preference according to event, sex, level, school grade. This subject consisted of 455 athletic high school students. For this purpose, the survey was conducted focusing on the leadership scale for sports. The analysis of leadership style was condeucted t-test by event, sex, level and analysis of variance(ANOVA) by school grade. Based upon the results of the study, It was found that 1. The difference of leadership style recognition according to event, athletic in competitive game show a wider difference than athletic in personal game. in addition, it was found that there are a significant difference in training and instruction behavior(p.<.05), democratic behavior(p<.01), social support behavior(p<.001), positive feedback behavior(p<.001). 2.The difference of leadership style recognition according to sex, male athletic show a wider difference than female athletic. In detail, democratic behavior(p<.001), social support behavior(p<.01), positive feedback behavior(p<.05). 3.The difference of leadership style recognition according to level, superior athletic show a wider difference than inferior athletic in all leadership styles. In detail, democratic behavior(p<.05), autocratic behavior(p<.05).4. The difference of leadership style recognition according to school grade, 1st grade students show the widest difference in training and instruction behavior, 3rd grade students show the widest difference in social support behavior. but there is no significant difference. 5. The difference of leadership style preference according to event, athletics in competitive game show a preference in training and instruction behavior, autocratic behavior, social supports behavior and positive feedback behavior. Among them, there are significant differences in autocratic behavior(p<.011), social supports behavior(p<.05).6. The difference of leadership style preference according to sex, male athletic show a wider difference than female athletic in all leadership styles. In detail, there are significant differences in training and instruction behavior(p<.05), autocratic behavior(p<.01), social supports behavior(p<.001), positive feedback behavior(p<.001). 7. The difference of leadership style preference according to level, superior athletic show a wider difference than inferior athletic in all leadership styles. In detail, there are significant difference in democratic behavior(p<.01), positive feedback behavior(p<.05). 8. The difference of leadership style preference according to school grade, 1st grade students show the widest difference in training and instruction behavior, democratic behavior and social supports behavior. 3rd grade students show the widest difference in autocratic behavior and positive feedback behavior. but there is no significant difference. The leadership style recognized by all subjects are training and instruction behavior the first, positive feedback behavior the second, democratic behavior the third and autocratic behavior the last. The leadership styles preferred by all subjects are training and instruction behavior the first, democratic behavior the second, and social supports behavior the third and autocratic behavior the last.

풍력 발전 시스템의 회전익 토오크 모델링

부성환,임종환,허종철,김건훈 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.2

항공기용 가스터어빈 엔진의 재료선정을 위한 DATA BASE 개발

金學奉,林慶鎬,金光培,夫俊洪,柳常新 한국항공대학교 1991 論文集 Vol.29 No.-

본 논문의 목적은 항공기용 가스터어빈 엔진의 재료선정을 위한 데이타 베이스를 구축하는 것이다. 한 엔진설계자가 어떤 엔진요소에 사용 할 재료를 선택한다는 것은 매우 어려운 작업이다. 따라서 수 많은 재료에 대한 정보를 관리 할 수 있는 데이타 베이스가 절실히 요구되고 있으나, 국내에서는 아직 이 방면의 기초연구가 이루어져 있지 않은 실정이다. 온도, 압력, 회전수등 각 부분에서의 작동조건은 다른분야에 의해 제공될 것이다. 본 연구에서는 재료공학적 관점에서 재료의 대표적성질로서 고온강도, 내식성, 내산화성, 항복강도, 열팽창계수, 융점등을 고려해서 후보재료를 선정할 수 있도록 하였다. 이외에도 성형성이나 제조단가등도 고려해야할 변수가 된다. 본연구의 결과 사용자의 편의를 고려한 전산프로그램이 개발되었으며, 이를 이용하여 새로운 재료정보의 입력, 요구 재료선정 및 선정결과의 출력등이 가능하다. 끝으로, 선정된재료에 대한 재료공학적 검토도 실시하였다. The purpose of this study is to develop a data base for material selection of gas turbine engines. Since it is very diffcult task for a design engineer to select materials of adequate properties for specific engine components, a good data base is strongly desired to manage informations on various kinds of materials. However, no basic research is reported in this area so far in our country. The operating conditions such as temperature, pressure, rpm of spools are assumed to be provided by other mechanical studies. Creep rupture strength, corrosion resistance, yield strength, thermal expansion, melting point, etc., are considered as typical properties in this study to search a group of candidate materials. Formability, manufacturing or purchase cost can also be important variables to be considered. As a result of this study, a user-fiendly computer program has been developed for input of new material information, interactive material selection, and output of selection results. Finally, discussion is presented from the viewpoint of materials engineering.

풍력 발전 시스템의 회전익 토오크 모델링

부성환,임종환,허종철,김건훈 제주대학교 산업기술연구소 1999 尖端技術硏究所論文集 Vol.10 No.2

Torque generated by the blade of a wind turbine is a non-linear function of the wind velocity, the angular velocity of the rotor and the pitch angle. Glauert's theory for propellers, though widley used, is not suited to simulate the performance under variable wind speed and pitch angle. Furthermore, the numerical iteration procedure of the theory districts the applicability of a real time control of the wind turbine. We suggest a new method of modeling the torque that can be used in a real time control. Based on Glauert's theory, the power coefficient curve is estimated. In the vicinity of the operating point on the curve, a linearized model is extracted in terms of the wind velocity, the angular velocity and the pitch angle. the usefulness of the model is demonstrated with the results produced by sets of experiments.