유한요소법을 이용한 용접부의 열전달 및 잔류응력 해석에 관한 연구

김일수,김인권,문채주,정영재,안영호 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5

This paper represents to develop a computer software system which is capable to analyze the phase transformation of high strength steel(BV-AH32) and to predict heat transfer and welding residual stress due to phase transformation during Gas Metal Arc(GMA) welding. The developed model was considered temperature dependent properties such as young's modules, coefficient of thermal expansion and yield stress as well as the double ellipsoidal heat distribution by the moving arc. From the results, it was found that the longitudinal and transverse residual stresses calculated by the coupled analysis of heat transfer, residual stress and phase transformation showed good agreement with the experimental data. In addition, the temperature distribution as well as longitudinal and transverse residual stresses of weldment by the 1-pass and 2-pass of welding were also determined.

현훈 환자 Neuron Specific Enolase의 임상적 의의

김원주,김선곤,유철형,김원찬,김용덕,최영철,이명식 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

유방통을 호소하는 한국 여성에서 Gamma Linolenic acid의 임상적인 효과

정재헌,김권천,조현진,민영돈,김성환,김정용,장정환 조선대학교 부설 의학연구소 2000 The Medical Journal of Chosun University Vol.25 No.1

Background and Objectives : Recently, the incidence of breast cancer is gradually increasing in korea. Many patients visit the hospital with a fear of breast cancer, if she had the pain in her breast. But Breast pain is not a cardinal sign of breast cancer. Only 7% of patient in breast cancer has breast pain. Materials and Method : To know the clinical effects of gamma-linolenic acid(GLA), we analyzed the medical records of 55 cases with breast pain, who visited the outpatient clinic of Chosun university hospital, between July of 1999 to December of 1999. Of the 55cases of breast pain, we analyzed 26 cases of patient with breast pain who was treated with GLA for 2 month and we excluded patients of breast pain who had breast mass or were treated with other drug. Results : 2 Patients we are dropped out because nausea and vomiting were developed, 4 Patient with breast pain were treated with GLA for 1 month, and relieved completely from mastalgia and 8 patients with breast pain were treated with GLA for 2 months and breast pain was relieved completelys. 4 patient had treatment for 2 months, were relieved slightly. But 8 patients with breast pain didn't reveal the relief of symptom after the intake of GLA. Conclusion : We conclude that GLA could be considered a first line drug in patients with mastalgia.

급성 하벽 심근경색증에서 경색관련혈관의 예측을 위한 초기 심전도의 유용성

차광수,김영대,김무현,김형권,김종성 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.7

결장직장암 환자의 임상적 고찰 : 조선대학교 부속병원의 10년 간의 결과

나은종,문성표,장정환,김권천,민영돈,김성환,조현진,김정용,김경종 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Background and Objectives: The colorectal cancer rates 4th in the total cancer prevalence in Korea. The clinical patient demographics were considered with the incidence rate of the colon and rectal cancer. The clinicopathological factors were analyzed for the 5 year survival rate. Materials Methods: Of the 282 patients who were operated from Jan. 1, 1992 to Dec. 31, 2001 and diagnosed by pathological biopsy as colo-rectal cancer, 234 patients were followed up. The age, sex, location of the cancer, TNM stage, operation method, histopathological classification, metastatic region, complications after operation and the survival rate were investigated. Results: Of the 234 patients, male and female consisted of 120 cases (51.3%) and 114 cases (46.7%), with an average age of 61.6 years. The average follow up period was 52.3 months and the peri operative mortality was 5.6%. The site of the cancer was most frequent at the rectum with 127 cases (54.3%). The patients were classified according to the TNM stages with 38 cases of stage 1 (16.2%), 98 cases of II (41.9%), 72 cases of III (30.8%) and 26 cases of IV (11.1%). The 5 year survival rate in the age group older than 50 was 63.3 % and 73.5% in the group younger than 50. In regard to the operation type, the 5 year survival rate was 65.4% for elective operation and 65.8% for emergency operation. The 5 year survival rate for well differentiated, moderately differentiated, poorly differentiated cancer, and mucinous adenocarcinoma was 73.7%, 60.2%, 58.3%, and 92.6%, respectively. The 5 year survival rate of each of the TNM stage is 81.1%, 74.8%, 57.0%, and 11.5% for Classes I, II, III, and IV, respectively. Conclusion: The clinical factors were analyzed for the 5 year survival rate with no statistical significance for the age, sex, and location of the cancer. The TNM stage and histopathological differentiation were statistically significant. The colon cancer showed better prognosis compared to the rectal cancer.

자발성 뇌지주막하출혈 환자에서 Cardiac Troponin Ⅰ를 이용한 심근손상의 발생율

김용권,류진호,소정일,문원식,전병조,허탁,민용일 대한응급의학회 1999 대한응급의학회지 Vol.10 No.4

Background : More than 90% of acute stroke patients have measurable cardiovascular sequelae, but we have been often overlooked in formal discussions of treatment. If we estimate the incidence of myocardial injury in patients with spontaneous SAH, we may figure the possibility of cardiac dysfunction in such patients. This study was designed to investigate the incidence of myocardial injury in patients with spontaneous SAH using cardiac troponin I(cTnI). Methods : A prospective single emergency center study was performed to determined preoperative incidence of unrecognized cardiac injury in patients suffering spontaneous SAH. We include the spontaneous SAH patients who underwent serum measurements of the cardic troponin I immediately upon admission last six month period. ECG, CK, CK-MB and myoglobin were also performed at admission. We excluded the spontaneous SAH patients who had past history of myocardial ischemia and ECG abnormality. Results : Fifty-two patients(34 females, 18 males) with spontaneous SAH were studied prospectively. 18 patients(34.6% of the total study population) had cTnI level above 0.5ng/ml. ECG was performed in 52 patients and was abnormal in 15 of the 52 patients(28.8%). Conclusion : The measurement of cTnI has provided physicians with a myocardial marker that has a cardiac sensitivity for cardiac injury equal to that of CK-MB yet with greater specificity. So, cardiac troponin I is useful to estimate the incidence of myocardial injury in patients with spontaneous SAH. And we may estimate the possibility of cardiac dysfunction in such patients. This knowledge will hopefully aid in the care and improve the outcome.

검도본(劍道本)의 변천에 따른 의미

김영학,정동권,허건식 龍仁大學校 1998 용인대학교 논문집 Vol.16 No.-

The purposc of this study is to examine the Bon(本) of Kumdo, from its establishment to revisions and amendments, and to identify the practical significance and the technical stucture of the Bon. The Bon of Kumdo is largely divided into the Bon of Daedo(大刀; long sword) and the Bon of Sodo(小刀; short sword), the former comprising seven kinds, the later three kinds. The current type of Bon that is used in different competitions and tests is the Japanese style, which was completes in 1933. This Bon synthesized the complex and various Kumdo techniques in a condensed form, which are, from the perspective of modern Kumdo, entirely the techniques of the first move of rare, the most simplified attacking techniques: or, from the perpective of attacker, of which the main body are made up of rare movements. Among these, only the seven Bons of the Daedo are equal first moves, and only the three Bons of the Sodo are in the form of the non-deadly sword, not the killing kind. Such Bon of Kumdo are selective kinetic expressions of the purpose, the method, the soguence, formalized through the experiences of numerous practicxians and accumulation of researches. The Bon of Kumdo must reflect and synthesize the most basic and desired techniques of all and serve as the purification of all Kumdo practices, including manners, facing posture, attack and defense, distance, cheering, and concluding attitudo. As specified above, the Bon must serve as a means of rejecting self=aggrandizement and superfluous exaggeration, which result form negligence of the martial discipline. The Kum(劍) as the menans of martial art can always turn to a performative object. Accordingly, it is necessary to examine the relation between the Bon of Kumdo and the Bon of modem Kumdo formalized as a competitive came. The Bon of Kumdo is the condensed form of all Jinkum(眞劍; real-sword) techniques of the past, rather than a form necessitated for Jukdo(竹刀; Bamboo-sword). In other words, the charactcristics of the Jinkum and the Jukdo are fundamentally different from each other. It is thus necessary to develop a new form that suits the Jukdo usage on top of the current Bon.

생산성 향상을 위한 생산 관리 시스템

김영진,오삼권,임기욱 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

기업 내 관련 업무 및 조직의 유기적 연결을 통한 원활한 정보의 흐름은 생산성의 중대에 많은 영향을 주며 기업의 경쟁력과도 밀접한 관계가 있다.이러한 이유로 연구개발에서부터 설계, 제조, 판매에 이르기까지 컴퓨터와 통신기술을 활용하여 기업의 업무 흐름을 통합적으로 관리할 수 있는 컴퓨팅 시스템이 필요하다.그러나 기업 내 업무의 성격 및 규모, 어플리케이션 튜닝 등의 충분한 검토가 수행되지 않은 컴퓨팅 시스템은 개발비용의 부담과 더불어 시스템의 성능을 오히려 저하시킬 수 있다.본 논문은 생산 제조 업체의 업무의 성격과 환경에 적합하고 업무의 흐름을 유기적으로 통합 관리할 수 있는 클라이언트/서버 기반 생산 관리 시스템을 설계 및 구현하였다.

위장질환에 따른 H.pylori 감염빈도와 검사방법의 비교분석

김대현,조재현,금민수,최성곤,이창형,탁원형,권영오,김성국,최용환,정준모 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.2

목적 : H. pylori가 위장관 질환의 병인에 깊은 관련이 있어 이의 적절한 진단 및 치료가 중요하게 대두되고 있다. 이에 저자들은 소화기 증상을 주소로 내원한 환자들을 대상으로 내시경 검사를 실시하여 H. pylori검출을 위한 CLO검사, IgG 항체검사 및 H&E 염색 등을 시행하여 각 질환별로 H. pylori 감염의 양성율을 알아보고 검사법에 따른 민감도 및 특이도를 그 유용성에 대하여 조사하였다. 대상 및 방법 : 1996 4월에서 8월까지 경북대학교병원에 소화기증상을 주소로 내원한 총 313명의 환자를 대상으로 내시경 검사를 실시하여 H. pylori 검출을 위한 CLO 검사, IgG 항체검사, 조직염색 검사를 실시하였다. 결과 : 전체 대상 환자수는 313명이었고 연령별 분포는 16세부터 80세 까지 다양하였으며 그중40대, 50대, 60대가 각각 69예(22%), 73예(23.3%), 65예(20.8%)로 전체 환자중 66%를 차지하였다. 남녀비는 2.07 대 1로 남자가 많았다. 대상환자의 평균나이는 52±15세였고, 전체 대상환자에서 H. pylori 양성군과 음성군의 평균나이는 각각 50±15세, 54±15세 였고, 궤양환자군에서 H. pylori 양성군과 음성군사이의 평균나이는 각각 49±14.8세, 55±13.8세로 나타났다. 각 질환별분포는 위염이 72명(23%), 십이지장 궤양이 85명(27.2%), 위궤양이 80명(25.6%), 위암이 20명(6.4%), 비궤양성 소화불량이 13명(4.2%), 기타가 43명(13.7%)이었으며, H. pylori 감염 양성율은 위염이 71%, 십이지장 궤양이 86.8%, 위궤양이 58.3%, 위암이 75%, 비궤양성 소화불량이 75%였으며 특히 유문륜 궤양에서는 100%의 양성율을 보였다. 소화성 궤양군과 비궤양군에서의 H. pylori 양성율을 비교해 본 결과 궤양군에서는 73.1%, 비궤양군에서는 72%로 통계학적으로 차이는 없었다(P=0.91). 소화성 궤양환자에서 출혈이 동반된 군과 동반되지 않은 군에서의 H. pylori 양성율을 비교해 본 결과 출혈이 동반된 군에서의 양성율은 54.5%였고, 출혈이 동반되지 않은 군에서는 77.5%의 양성율을 보여 출혈이동반되지 않은 군에서 통계학적으로 유의하게 높았다(P=0.014). 나이에 따른 양성율을 알아본 결과 50세 이하에서는 78.5%였고, 50세 이상에서는 67.5%로서 양성율이 낮았으나 통계학적으로 유의성은 없었다(P=0.052). 각 검사법에 따른 민감도 및 특이도는 전체 환자중에서는 CLO검사가 88.9%, 96.1%, IgG항체검사 90.8%, 58.5%, H&E 염색검사 86.9%, 79.2%로서 민감도는 비슷하게 나왔으나 CLO검사는 상대적으로 특이도가 다른 검사법에 비해 높았다. 궤양군에서의 CLO검사의 민감도와 특이도는 92.0%, 95.6%였고, 비궤양군에서의 민감도와 특이도는 84.3%, 96.8%로서 비궤양군에서는 CLO검사의 민감도는 약간 낮았다. 나이에 따른 CLO 검사의 민감도 및 특이도는 50세 이하에서는 91.5%, 93.1% 였고, 50세 이상에서는 86.3%, 97.9%로서 50세 이상에서는 상대적으로 CLO검사의 민감도가 낮았다. 결론 : 본 연구에서는 위장질환에 따른 H. pylori 양성율을 알아보았는데, 다른 보고에서 처럼 높게 나왔으며, 진단 방법으로 사용한 CLO검사, IgG항체 검사, 조직염색검사 등은 모두 비교적 높은 예민도를 나타냈고, 그중 CLO검사가 간편하고 경제적이라는 면에서 임상적으로 유용한 검사로 여겨지나 상대적으로 CLO검사의 민감도가 낮은 비궤양성 질환과 50세 이상의 환자군에서는 CLO검사 외에 다른 검사방법을 병행함으로써 H. pylori의 진단율을 높일 수 있을 것으로 사료된다. Background: Gastric colonization by Helicobacter. pylori is common among patients with peptic ulcer and gastritis. And various diagnostic tests are available in confirming H. pylori infection. The aim of this paper is to estimate the prevalence of H. pylori infection in Gastroduodenal disorders and compare the sensitivity and specificity of the most widely available tests. Methods: A total of 313 patients were tested for H. pylori infection by IgG Ab, CLO test and H&E stains. Results: The prevalence of H. pylori infection was significantly higher in duodenal ulcer(86.8%) than in gastric cancer(75%), gastritis(71%) and gastric ulcer(58.3%)(P=0.009). The sensitivity and specificity of each test was as follows: CLO test(88.9%, 96.1%), IgG Ab test(90.8%, 58.5%), H&E stain(86.9%, 79.2%). Sensitivity of CLO test in peptic group was 92.0%, whereas in non-peptic group, it was 86.3%. Sensitivity of CLO test in age under 50 was 91.5%, that over 50 it was 86.3%. Conculsions: There is a strong association between H. pylori and gastrointestinal disorders. CLO tests have relatively high sensitivity and specificity, especially in peptic group and younger age(below 50 yr)group. But in those patients in which CLO tests are less sensitive (age>50 or non-peptic group), more than one test may be necessary to diagnose the presence of the organism.

뇌기능 장애 환자에서 뇌 SPECT의 유용성

김권영,신수범 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Objective: To evaluate usefulness of the brain SPECT in brain dysfunction patients who showed low Mini-MentaI State Examination(MMSE) score. Method: Eighty four patients who were visited to a rehabilitation hospital for their brain dysfunction were retropectively studied. We investigated percent of positive finding in brain SPECT, brain CT, MRI, P-300 studies, and correlation of MMSE scores, brain SPECT, P-300 studies, and correlation of brain SPECT, brain CT and MRI, P-300 studies. Resutts: Percent of positive finding in brain SPECT was high than brain CT, MRI, P-300 studies. MMSE scores were positive correlation with brain SPECT, but no correlation with P-300 study(P>0.05). Brain SPECT were significant correlation with brain CT (P<0.05), but no correlation with brain MRI and P-300 studies (P>0.05). P-300 study was no correlation with brain CT, MRI (P>0.05). Conclusion: We concluded that brain SPECT is useful for reflection of brain dysfunction.