가로변 건축물 외관에 있어서 창의 이미지 특성에 관한 연구

이청웅,양동협,강형구,최환석 朝鮮大學校 建設技術硏究所 2000 建設技術硏究 Vol.20 No.1

The window in architecture has a mysterious role connecting the indoor and outdoor world and also an interaction. this study investigates the functions of the past and present windows and its functions which will be required in future and aims a t seeking a planning direction of desirable window by integrating the understanding of window plan in outdoor space of building and new design techniques. The origin of window and its developmental process are expressed primarily by internal functions and it has been discussed from the external viewpoint with the development of structure, materials and social and cultural aesthetic sense. Accordingly it describes the history and place of windows to define the functions of windows and Chapter 2 states the forms, functions and treatments of window opening part according to the times. Chapter 3 cites the cases of the prototypes of forms shown in the outside of building as the functional and design elements windows in building. Chapter 4 suggests the positive cases of window prototype which produces the outdoor space of modern architecture and examines the correlation of it to the various elements according to the objective methods and order on the basis of SD method. Consequently, the windows in building should be planned by considering the following: 1. The window must be faithful to its original purposes. 2. It should be based on a great design because it is an important part which shows the appearance of building in urban area. 3. As today's buildings are large-scaled and high storied and also have unique characteristics, the development of construction technique and the production of good materials and products should be made. 4. The various general factors of windows should be analyzed and considered in planning windows as well as its design and technical sides.

Permalloy자성박막의 이온빔 에칭에 관한 연구

이환철,양재웅,안재우 대진대학교 1995 大眞論叢 Vol.3 No.-

The etching characteristics of r.f.-sputtered permalloy magnetic thin films using ion beam apparatus are investigated. The process parameters investigated during ion beam etching are accelerating voltage, beam voltage and beam current. The etch rate of the permalloy films is proportion to the beam current, but it is not directly related to the accelerating voltage and beam voltage. The dependence of etch rate on the process parameters can be explained by the ion beam current density. It is found that the ion beam etching is on effective method in obtaining well-developed micropatterns on the permalloy thin films.

단기간 체중감량 시 크레아틴 투여가 혈중 피로유발 요인 변화에 미치는 영향

이복환,하웅의 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

The purpose of this study was to examine the effects of creatine supplementation during weight loss on the changes of blood fatigue factors. The subjects of this study were 11 male college Taekwonclo players. The subjects were divided into two groups; creatine supplementation group and controlled group. The following results were obtained from the analysis of fatigue induction factors(lactic acid, ammonia, inorganic phosphate) by periods of weight loss of controlled group. 1. The lactic acid level in the blood of the creatine supplementation group was lower than the controlled group but the result was not significant statistically(p>.05). 2. The level of ammonia in the blood of the creatine supplementation group was lower than the controlled group and the result was significant statistically(p<.05). 3. The level of inorganic phosphate in the blood of the creatine supplementation group was lower than the controlled group and the result was significant statistically(p<.05).

일반화된 Active Contour Model을 이용한 변형 물체의 움직임 추적과 분석에 관한 연구

이웅기,허영남,양환석 조선대학교 기초과학연구소 1997 自然科學硏究 Vol.20 No.1

본 논문은 일반화된 Active Contour Model을 이용하여 연속적으로 입력되는 영상에서 변화하는 물체의 움직임 추적과 분석 방법을 제안한다. 그리고 연속적인 영상 프레임에서 물체 경계의 추적은 외곽선 모델의 에너지 함수를 최소화하므로써 이루어진다. 물체의 추적, 적응적인 움직임 예측의 효율을 증가시키기 위하여 입력되는 영상에 존재하는 일시적인 움직임 정보를 이용하였고 물체의 움직임과 변형 처리를 위하여 움직임 추적 알고리즘으로부터 변형 행렬을 유도했다. 본 논문에서 제안한 일반화된 Active Contour Model을 입술추적 실험의 행동 분석에 적용하였다. 그리고 그 응용에서 전위 벡터와 변형 행렬의 일시적인 변화는 인간 얼굴 특징의 국부적 변형을 설명하는데 이용된다.

溶融鹽 中에서 鐵系素地金屬의 A1 메탈라이딩에 關한 硏究

梁在雄,安在禹,李煥哲 대진대학교 1995 大眞論叢 Vol.3 No.-

A new coating process known as metalliding has been adopted to have the diffusion coating of aluminium on steel from molten fluorides(29.2wt.% LiF-11.7wt.% NaF-59.lwt.% KF, FLINAK). Experiments were carried out in argon gas atmosphere. The electrolytic cell consists of a steel cathode and a consumable aluminium anode. The reagents were vacuum dried to remove the moisture for 24hrs. at 400 C and the electrolyte was pre-electrolyzed to remove residual impurities. The influence of the co-deposition of manganese was also investigated. The quality of deposit was analyzed by SEM, EPMA and also examined by Micro-Vickers hardness, and corrosion tests. Deposit layer was identified as an aluminium-rich iron alloy layer caused by diffusion process. The optimum condition for the metalliding was found to be the bath temperature, 575℃, the amount of AlF_(3), l0wt.%, and the current density, 50 to 150mA/cm^(2). Addition of manganese fluoride (up to 5wt.%) as a co-deposit element improved significantly the quality of deposit layer.

치과 기공사들에게서 나타나는 호흡기 증상과 이의 관련 요인

김웅철,오세윤,김지환,김진완,이준석,이가영,이세훈,유진호,김태석 高麗大學校 倂設 保健大學 保健科學硏究所 2001 保健科學論集 Vol.27 No.1

This study was carried out to investigate subjective respiratory symptoms and their attributable factors in Korean dental laboratory technicians. A questionnaire was mailed to randomly selected 1,900 dental laboratory technicians. Among them, 1,344 dental technicians completed the questionnaires and returmned them. Validity and reliability tests on the questionnaires were carried out before the main survey. To investigate risk factors on respiratory subjective symptoms, we performed analysis on distribution of characteristics, and then investigated univariate analysis and multiple logistic regression analysis. The prevalence rate of wheezing, cough and phlegm, and dyspnea was 4.8%, 33.9%, 54.9%, respectively. Statistically significant factors inducing subjective respiratory symptoms by multiple logistic regression analysis were sex, smoking, exercise, health examination, work hours a day, investment gas, investment dust, metal fume, resin vapor, and asbestos dust. Considering the results above, it seems that most subjective respiratory symptoms are related with health habits and occupational environmental-related factors. The result, consideration in mind, suggest that health promotion programs for smoking cessation, regular health examination, and physical exercise in health habit, and improvement on casting and resin work in dental technological environment be necessary.

치과기공사 국가시험 과목 타당성 연구

김웅철,이원철,손영석,오세윤,김부섭,유진호,김지환 한국보건의료인국가시험원 2005 보건의료교육평가 Vol.2 No.1

This study prepared a basic framework for the development and improvement of Korean Dental Technicians' Licensing Examination, based on actual test questions. A peer review was conducted to ensure relevance to current practices in dental technology. For the statistical analysis, 1000 dental laboratory technicians were selected; specialists in dental laboratory technology (laboratory owners, educators, etc.) were involved in creating valid and reliable questions. Results indicated that examination subjects should be divided into three categories: basic dental laboratory theory, dental laboratory specialties, and a practical examination. To ensure relevance to current practice, there should be less emphasis on basic dental laboratory theory, including health-related laws, and more emphasis on dental laboratory specialties. Introduction to dental anatomy should be separated from oral anatomy and tooth morphology; and fixed prosthodontics should be separated from crown and bridge technology and dental ceramics technology. Removable orthodontic appliance technology should be renamed 'orthodontic laboratory technology'. There should be less questions related to health related law, oral anatomy, dental hygiene, dental materials science and inlay, while the distribution ratio of questions related to tooth morphology should be maintained. There should be a decrease in the distribution ratio of questions related to crown and bridge technology, dental ceramics technology, complete dentures and removable partial dentures technology, and orthodontic laboratory technology. In the practical examination, the current multiple choice test should be replaced with tooth carving using wax or plaster. In dental laboratory specialties, subjects related to contemporary dental laboratory technology should be included in the test items.

지주막하 출혈을 동반한 용혈성 요독 증후군 1례

김웅흠,김우택,이창연,김동욱,박성기,장무환 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

Hemolytic uremic syndrome is characterized by Coombs-negative microangiopathic hemolytic anemia, thrombocytopenia, and acute renal failure in infant and children. At present, E. coli 0157 : H7 and other verotoxin-producing E. coli(VTEC) seem to be a major cause of this illness. The majority of patients have a prodrome of bloody diarrhea, and acute renal failure develops several days to weeks later. Although an optimal treatment remains unknown, the general management of hypertention and renal failure with early and frequent dialysis is the mainatay of treatment, and intravenous administration of immunoglobulin G is like to be effective. We experienced a case composed of bloody diarrhea, seizures, coma, and anuria in 1 year old girl who was diagnosed as HUS and recovered renal function completely with slight impairment of cognitive ability and behavioral function. We presented this case with a review of literatures.

클러스터를 기반으로 한 인증 기법에 관한 연구

양환석,김종민,이웅기 朝鮮大學校 統計硏究所 2006 統計硏究所論文誌 Vol.8 No.1

본 논문에서는 ad hoc network에서 클러스터를 기반으로 노드들의 인증을 통한 안전한 데이터 전송 방법을 제안하였다. 클러스터를 관리하는 클러스터 헤드 노드는 클러스터가 형성될 때 멤버 노드들의 이웃 노드들에 대한 신뢰 정보를 받는다. 클러스터 헤드는 이러한 신뢰 정보와 자신의 정보를 조합하여 보다 정확하고 효율적으로 다른 노드를 평가한다. 이렇게 함으로써 네트워크에 새롭게 참여하는 노드에 대해서도 보다 정확한 인증을 수행할 수 있게 된다. 그리고 무선망의 제한된 대역폭을 고려하여 네트워크 상의 제어 패킷의 양을 줄여 데이터 전송의 효율성을 증가시키기 위해 제한된 broadcast 메커니즘을 이용하였다. 실험을 통해 제안한 방법의 효율성을 확인하기 위해 클러스터 헤드의 수, 경로 길이, 그리고 제어 패킷의 양을 측정하였다.

치과기공사의 스트레스 증상과 직무요인과의 관련성 연구

김지환,오세윤,김웅철,유진호,김태석,이준석,이원철 高麗大學校 倂設 保健大學 保健科學硏究所 2001 保健科學論集 Vol.27 No.2

This study was carried out to investigate psychiatric stress symptoms and stress- inducing factors, such as role overload, work demand, work procedure and so forth in korean dental laboratory technicians. Questionnaires were mailed to randomly selected 1000 dental technicians who were systematically selected. Among them, 786 dental technicians completed the questionnaires and returned them. Validity test and reliability test on the questionnaires were done prior to the main survey, using the SCL-90-R as a standard. Stress-inducing factors were identified with a multiple regression analysis on the continuous variables. To investigate stress-inducing factors on stress symptoms, analysis on distribution of characteristics was performed, and then correlation analysis and multiple regression analysis was carried out. The results of the study were as follows: According to multiple regression analysis, there was a statistical correlation between stress symptoms and role overload, work procedure, occupation conflict, interpersonal relationship, social support, personality traits in stress symptom(GSID). The stress symptoms in korean dental laboratory technicians seemed to be mostly job related ones, and considering the results obtained from the study, it is suggested that reducing work load and proper health promotion programs for dental technicians be necessary.