인터넷을 이용한 차체 구조물의 신뢰성 최적설계 시스템 개발에 관한 연구

이제형,임홍재 국민대학교 생산기술연구소 2002 공학기술논문집 Vol.25 No.-

In this paper, a reliability based design optimization system using internet web is developed for vehicle structure design. Interface modules are developed to communicate data between the internet web and the existing analysis codes such as section analysis, FE analysis, reliability analysis, and software integration programs. Structural characteristics are expressed in terms of the thickness, typical section shape of the thin walled beams, and tolerance probability. The approximate functions are used for the reliability based optimal design of the vehicle. Reliability based optimal design of a passenger car body structure is presented to demonstrate the proposed technique.

韓國 靑少年들의 體格 發達에 關한 調査 硏究

李濟炯 全北大學校 師範大學 1977 사대논문집 Vol.3 No.-

From 1961 to 1975, make public in the government and a corporation for the purpose of studying about physical growth of the Korean students, as a result of make an analysis and research measurement data of height, and chest circumference, got as following conclusion. 1. Upon investigation growth appearance about height every year, from 1961 to 1975, between fourteen years of age and fifteen years of age, It seemed fast growth. 2. Upon investigation growth appearance about weight and chest circumference every year, from 1961 to 1975, between fourteen years of age and fifteen years of age, It seemed fast growth. 3. Upon investigation general growth appearance, It seemed fast growth between 1961 and 1962 year, and from 1963 to 1972, It seemed some drop appearance.

職場人들의 STRESS 診斷硏究

李濟炯 全北大學校附設 스포츠科學硏究所 1984 논문집 Vol.- No.1

In proportion that many business matters are automatized due to the highly developed scientific civilization, the opportunity of human being's physical activiteies is decreascd, while the amount of mental labors is increased. Modern men are harassed by physical and psychological stress because of rapid augumentation of various kinds of business matters. Furthermore, modern professional workers have many anxieties especially such as children's entering higher school and their acquiring better jobs in the family. In the office, they are molested by excessive business and complex personal relation and deficiency of excercises and augmented mental overworking. Workers with both management and deskworking have this sort of stress as well. The stress causes neurological gastroenteritis diseases and nervous headaches and psychological illness and makes workers listless and lack of will to work with chronic tiredness, which are red signals to threaten the health of modern men added with uncertainty, tension, horror and melancholy. Again what human beings feel stress is commonly the death of family members and diseases and changing jobs. This stress is called “20th century's spiritual germ” by specialists of neuro-psychological department The sources of stress are responsibility of business and dissatisfaction of job and rivalism of fellow workers and skeptism of self-ability and inferiority and imperfect personality with psycholce unballance and social structure and air pollution and popullation skyrocketing. This thesis is concerning the sources of stress and the amount of stress of professional workers around us. To obtain the data for countermeasures, workers of 5 industrial circles within the Jeonju industrial zone and faculties and personnels of Jeonbug Natlonal University are given and analysed questionaires about physical and psychological stress. conclusion 1. About the degree of stress indication among professional workers, inactiv desk-workers are higher than skillful workers sitting in the chair on the both sides of male and female. 2. In the case of male without drinking and smoking, the amount of stress is less, and the more he drinks and smokes, the higher the stress. It is advisable to restrain them because wine and cigarettes are only temporal stress annulment. 3. Physical stress gives rise to mental stress. 4. Keeping proper exercises and various recroation for diversion is prevenrion as well as obliteration of physical and mental stress. Suggestion 1. In every working places, the facilities of leisure sports should be equipped for health improvement and welfare according to the law of health promotion. 2. Professional workers should be more careful to their own health.

各 年齡層의 一日步行 距離 比較 硏究

李濟炯,柳尙秀 全北大學校附設 스포츠科學硏究所 1984 논문집 Vol.- No.2

With scientific development, lots of people are more often making use of cars not only in traveling, long or short journey, but also in everyday life. Modern traffic facilities have made human life easy but men have been deprived of opportunities of physical exercises ; this becomes a barrier to the development of growing youths. It is a good thing that those who are anxious about their health realize the importance of walking. They are trying to supplement their insufficient walking with leisure sports such as early-morning-walking, jogging, soccer, tennis, bowling, or mountain-climbing, but they need more supplement. This study deals with daily walking distance of rural men workers and housewives between twenties and sixties who cannot enjoy leisure sports. Daily walking distance was measured by pedometer at 10-year intervals and the results are shown in Tables 11 and 12. The analyses of the above results are shown in Tables 13-16. As a result of this study, the followings can be suggested : 1. Walking itself is a reflex but concomitant movement of each part of body : therefore we should make it a rule to walk. 2. To be effective, we should walk according to certain rule rather than unconsciously ; that is, walk lightly with our heads in the air, with legs out straight, and with long steps. 3. Another effect of walking is sustaining power ; therefore we should walk at a speed of 100-120 meters per minute for 30-60 minutes a day.

반도체 레이저의 온도 및 주입전류 의존성에 관한 연구

김의훈,김필수,이제형 漢陽大學校 基礎科學硏究所 1992 基礎科學論文集 Vol.11 No.-

반도체 레이저의 온도와 주입전류 변화에 따른 방출스펙트럼의 특성을 조사하고 파장조정 가능성을 연구하였다. 실온에서 피크파장 780nm를 가지는 Mitsubishi사의 GaAlAs계의 레이저 다이오우드에 대해 주입전류를 일정하게 유지하고 온도를 변화시켰을 때의 방출피크파장은 계단적으로 증가하였으며 파장의 의존도는 0.20nm/℃였다. 온도를 일정하게 유지하고 주입전류를 변화시켰을 때의 방출피크파장 역시 계단적인 변화양상을 보였으며 파장의 전류 의존도는 0.11nm/mA였다. 한편 레이저 다이오우드의 문턱전류는 다이오우드의 온도 증가에 따라 거의 지수함수적으로 증가하였다. 온도와 주입전류 변화로 얻은 최소 방출파장은 770nm이었다. Spectral characteristics and wavelength tunability of a semiconductor diode laser have been studied by examining the wavelength dependence on temperature and injection current. The results show that the output peak wavelength from a Mitsubishi GaAlAs laser diode increases stepwise with increasing temperature at constant injection current, showing the wavelength dependence on temperaure of 0.20nm/℃. On the other hand, the output peak wavelength also varies stepwise with increasing injection current at constant temperature, representing the wevelength dependence on injection current of 0.11nm/mA. The measured threshold currents of the diode laser increase exponentially as a function of temperature. By control of temperature and injection current of laser diode, the output peak wavelength can be attained down to 770nm.

特技者와 非特技者 間의 體力에 關한 硏究

李濟炯 全北大學校 師範大學 1978 사대논문집 Vol.4 No.-

The purpose of this study is to obtain the references for training and guiding the students in the field of physical education, understanding the level of physical fitness between the trained and the untrained. The effects show that the trained are more highly-recorded than the untrained in stature, weight and sitting height. In the field of physical fitness, the trained are more highly-recorded than the untrained in sit-ups and ball-throwing, however the untrained are more highly-recorded than the trained in flexibility and chinup.

ATP-CRA 방법을 이용한 위암조직의 항암제 감수성 검사결과

이제형,Lee, Je-Hyung 대한위암학회 2007 대한위암학회지 Vol.7 No.3

목적: 진행성위암의 경우 근치적 수술 후 보조항암요법에도 불구하고 5년 생존율이 그리 높지 않은 것으로 보고되고 있다. 이에 항암제 감수성 검사를 기초로 한 항암요법은 최소한 환자들에게 효과가 없는 약제 투여를 막을 수 있는 기회를 제공할 수 있다는 측면에서는 고무적이라 할 수 있다. 본 연구에서는 보조항암요법의 효과를 높이기 위한 유효약제 선정을 위하여 항암제 감수성검사를 실시하였으며 그 결과를 분석하여 항암제 선택에 이용하고자 임상병리학적 요인에 따른 항암제 감수성을 비교하였다. 대상 및 방법: 2005년 8월부터 2006년 8월까지 영남대학교 병원 외과에서 위절제술을 받은 위암환자 81명의 위암절제조직을 이용하여 항암제 감수성 검사를 실시하였다. 검사방법은 ATP (Adenosine Triphosphate) based chemotherapy response assay였다. 항암제 감수성과 임상병리학적 요인과의 상관관계를 보기 위하여 성별, 연령, 종양표지자(CEA 치, CA19-9 치), 암의 위치, 진행암 형태, 조직학적 형태, 분화 유무, 침윤도, Lauren 분류, Ming 분류, 림프관 침윤 유무, 맥관 침윤 유무, 신경 침윤 유무, 림프절 전이 유무, 병리학적 병기를 선정 비교하였다. 결과: 위암 환자를 대상으로 한 항암제 감수성 순위를 보면 5-FU, Epirubicin, Irinotecan, Oxaliplatin 순이었으며 통계학적으로 유의했다(P=0.000). 성별, 연령, 종양표지자(CEA 치, CA19-9치), 암의 위치, 진행암 형태, 조직학적 형태, 분화 유무, 침윤도, Lauren 분류, Ming 분류, 림프관 침윤 유무, 맥관 침윤 유무, 신경 침윤 유무, 림프절 전이 유무, 병리학적 병기 모두에서 유의하게 감수성의 차이를 보였다. 결론: 위암절제조직에서 시행한 항암제 감수성 순위는 5-FU, Epirubicin, Irinotecan, Oxaliplatin의 순이었으며 위절제술을 받은 위암환자의 절제조직을 이용 항암제 감수성검사를 시행한 결과 약제별 임상병리학적 인자에 따라 감수성의 차이가 있으므로 획일적인 항암화학요법을 실시하는 것보다 항암제 감수성 검사를 통하여 감수성 높은 약제들을 조합하여 사용하는 것이 바람직할 것으로 보인다. Purpose: Recently, chemosensitivity tests have become widely used for the selection of effective drugs in gastric cancer patients. In this study, a chemosensitivity test was performed to select agents to increase the effectiveness of adjuvant chemotherapy. Materials and Methods: Chemosensitivity testing was performed in 81 gastric cancer patients that received a gastrectomy at the Yeungnam University Hospital. An ATP (adenosine triphosphate) based chemotherapy response assay was used. Clinicopatholgical factors such as sex, age, expression of tumor markers (CEA and CA19-9 levels), location of the tumor, morphology of advanced cancer, histological type, cell differentiation, depth of invasion, Lauren classification, Ming classification, lymphatic invasion, vascular invasion, neural invasion, lymph node metastasis and TNM stage were used to correlate the chemosensitivity and clinicopathological factors. Results: The most effective antitumor agents in gastric cancer patients were (in order of effectiveness) 5-FU, Epirubicin, lrinotecan and Oxaliplatin in our series. The chemosensitivity test showed a significant difference in susceptibility according to clinicopathological factors. Conclusion: Further studies on multidrug therapy are needed to evaluate synergistic effects of drugs. Therefore, for effective chemotherapy, it is more efficacious to select a chemosensitive drug than continue to use the same drug regimen.

DCT를 이용한 가정용 디지털 VTR용 영상 압축 알고리즘과 배속 모드에 관한 연구 ( A Study on New DCT Based Image Data Compression Algorithm and Variable Speed Playback for A Home-Use Digital VCR )

이제형,서정태,박용철,차일환,윤대희 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.1

비 자성층을 사용한 Double Barrier Tunneling Transistor의 특성

이제형,박상용,주성중,신경호,이유종,조영준,홍진기,이긍원 한국자기학회 2004 한국자기학회 학술연구발표회 논문개요집 Vol.14 No.1

임베디드 프로세서를 위한 최적화 컴파일러 기술

이제형,이준표,이승일,문수묵 대한전자공학회 2004 전자공학회지 Vol.31 No.11