Design of Vibratory System Subjected to Lateral Vibrations

鄭璿煥,盧承勳 金烏工科大學校 1989 論文集 Vol.10 No.-

본 연구는 횡진동을 받는 기계시스템 설계의 최적화에 관한 연구로서, 시스템의 구성은 베어링에 의해 지지되고 기어축과 연결된 유연한 2개의 질량이 달린 로터로 되어 있다. 최적설계의 구간과 예가 조사되었으며 각 구간에 대한 최적설계 조건이 고찰 되었다.

효소면역측정법을 이용한 Lambda Antigen Tray 키트의 Panel Reactive Antibody 검사 유용성 평가

송선미,박병택,양윤선 대한임상병리학회 2000 대한임상병리학회지 Vol.20 No.6

양측 쇄골하동맥 및 양측 신동맥 협착을 동반한 Takayasu 동맥염 1예

임선호,임수빈,오석규,이재홍,정진원,박양규,박옥규,소병준,노병석 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.8

過失犯에 關한 硏究

李璇馥 忠州大學校 1978 한국교통대학교 논문집 Vol.11 No.2

Dieser Aufsaty befasst sich mit der Entwicklung und theoretischen Grundlage des sog. verlrauensgrundsatz steht in erger Beziehuny mit der lehre des erlaubten Risikos Die Lehre des erlaubten Risikos veranlasste die wandlung der Dogmatik der fahrlassigen Delikten. Der verfasser meint, dass beir Aufbau des verlrauen sgrundsatzes zwer Grundgedan die Rolle spielen. Der erste ist die Inleressenabwagung zur uberwogender Interessen des reibungslosen Gesamtverhehrs soi der die uberspannte sorgqultspflicht ablehnende vertrauensgrundsty erborderlich. Der zweite ist die Lehra von der objehtiven zurechnung. die insbeonders stratenwerth hervorhebt: Man habe in der Regel nicht fur fremde sorgqaltsmangel einzustehen sondern durfe doralf zertrauen, dass jebermann seine sorgfaltspflichten erfullt. Schliesslich gesagt, meint der verfasser, dass der vestrauensgrundsaty line richtige sorgfaltsregel, ist und zur materialen konkretisierung des sorgfaltsbegriffs beitragen wurd.

PC에 의한 재래식 NC 선방의 DNC화

김근태,정선환,노승훈 金烏工科大學校 1991 論文集 Vol.12 No.-

The key feature of any DNC System is the on-demand supply of parts program data to a number of NC machine tools. Usually DNC Systems are based on the main frame computers or mini computers. This paper describes the design philosophy and the implementation of a PC-based Low-Cost-DNC system of a conventional NC Lathe which was made in the early 1970s.

韓國在來山羊의 體重에 따른 屠體 및 精肉生産量

全海烈,金善丘,趙炳旭,愼澤淳 密陽産業大學校 農業技術開發硏究所 1998 農業技術開發硏究所報 Vol.2 No.1

한국 재래산양 34두로부터 체중에 따른 도체 및 부산물 생산량과 정육율을 조사하였다. 생체중이 13.3kg에서 33.4kg까지 증가함에 따라 도체율은 35.32%에서 45.94%까지 상승하였다. 생체중(X)과 도체율(Y)의 관계는 Y=-4.537 +4.049X-0.067X2으로 추정되었으며 생체중 28KG에서 도체율(48.7%)이 가장 높았다. 도체중이 4.70KG에서 15.34KG으로 증가에 따라 정육율도 64.05%에서 74.31%로 증가하였다. 도체중(x)과 정육율(y)의 관계는 Y= 50.162+3.533X-0.127X2으로 추정되었으며 도체중 13.9KG (생체중30KG)에서 정육율(74.7%)이 가장 높았다. 따라서 재래산양의 적정 도살 시기는 생체중 30KG 내외가 적당할 것으로 사료된다. Thirty-four heads of Korean native goats were used to investigate the yields of carcass and by-products and lean-meat percentage as influenced by live weight. The dressing percentages were increased 35.32% to 45.94% with increasing live weight from 13.3kg to 33.4kg. The regression equation of dressing percentare(Y) on live weight(X) was Y= -4.537 + 4.049X - 0.076X2 and the highest dressing percentage(48.7%) was found at 28kg of live weight. The lean-meat percentages were increased 64.05% to 74.31% with increasing carcass weight from 4.70kg to 15.34kg, The regression equation of lean-meat percentare(Y) on carcass weight(X) was Y =50.162+3.533X-0.127X2 and the highest lean-meat percentage(74.7%) was found at 13.9kg of carcass weight (30kg of live weight). Therefore, it is considered that the optimum slaughter weight of Korean native goat is around 30kg of live body.

Instability of a Rotor Supported by Pressurized Gas Bearing

盧承勳,鄭璿煥 金烏工科大學校 1989 論文集 Vol.10 No.-

기체 베어링은 공기를 윤활제로 사용함으로써 그에 따르는 여러가지의 장단점을 가지고 있다. 특히 고속작동을 필요로 하는 기계에는 기체베어링의 응용이 크게 증대되고 있다. 본 연구에서는 기체베어링의 내부표면에 기공을 가진 재료를 도입, 외부로 부터 압력을 가함으로서 자체 작동 기체 베어링에 비해 시스템의 불안정성이 크게 개선될 수 있다는 사실이 확인되었다.

용접강의 Fractography 및 기계적 특성에 관한 연구

이종형,정선환,박장규 國立金烏工科大學校附設生産技術硏究所 1997 産業技術開發硏究 Vol.13 No.-

Welding is on the important situation in the connect methods of metals. The interrelationships of nonstress relief annealing, stress relief annealing, hardness value of welding area in the full annealing state, impact value, microstructure, and fracture were studied with the welded mild steel, therefore I got the followingresults. In the respect of impact value and hardness value, the mechanical characteristics of welding area were as good as those of base metal. Especially, as stress relief annealing not only decreased the high hardness of welding area but also increased the impact value of heat area, the negative effects of local heating were reduced and the whole impact value was improved effectively. The smaller the crystilline structure and the area rate of brittleness fracture, the more the hardness value and impact value, and the crystals of welding area that was heattreated with stress relief annealing and full annealing were still smaller than those of base metal. However, I can conclude from my experiment that it is difficult to use the full annealed materials as a welding structure, because the crystals of full annealed materials increase in size and the mechanical characteristics get worse.

NC 공작기계에서의 임의곡면가공에 관한 연구

이광희,노승훈,정선환 金烏工科大學校 1991 論文集 Vol.12 No.-

Many parts of the automobiles, ships and airplanes have complicated shapes and surfaces which are difficult to be defined analytically. These shapes are mostly expressed using wire-frame models, surface models, solid models, etc.. Many researches have also been done for defining surfaces by Bezier, Ferguson, Coons, et al.. All the above mentioned methods are basically point-connecting techniques, and consequently it is not easy to obtain the tool paths. In this study, therefore, the effort was concentrated on developing a soft-ware which can automatically define a tool path as a function from the data set obtained from a practical model. It can also help PC send the information to the machine tool much more effectively.

남자대학생들의 피부관리실태와 관련요인 조사연구

배향선,남철현,김성우,최연희,강영숙,김선혜,구재희 慶山大學校 保健福祉硏究所 2003 保健福祉硏究 Vol.8 No.-

This study was conducted to examine aspects of skin care of male students at colleges and universities of male students at colleges and universities and its related factors in order to provide informations on skin care for men. The subjects of this study was 600 men who were students at colleges and universities in Daegu City and Kyungbuk Province. Data were collected from May 1, 2002 to June 30, 2002. The results of this study can be summarized as follows. 1. According to the respondents' socio-demographic characteristics, 55.9% of them was 20 to 24 years old and 29.6% was more than 25 years old. 84.9% of them was university students, while 15.1% was college students. 25.3% belonged to the lower class, while 22.4% belonged to the upper class. 52.7% did not have a girl friend, while 47.3% has a girl friend. 41.8% lived in big cities and 48.1% lived in small and medium cities. 2. 63.0% of the respondents replied that they were in good health, while 8.8% of them were in bad health. 41.9% of them was concerned about face and body skin care, while 14.1% was not concerned about it. Among most serious skin problems, the proportion of acne was highest (44.5%). 3. Among the persons who advised the respondents when they selected cosmetics, the proportion of selecting cosmetics as their own will was highest (44.7%). 25.3% of them selected it by recommendation of female family members and 18.3% selected it by recommendation of the girl friend. In the case of selecting it as their own will, the older they were, the higher the proportion was. In the case of having the girl friend, the proportion of selecting cosmetics by recommendation of the girl friend was higher than that of selecting it by recommendation of female family members. 4. 90.4% of the respondents replied that they never visited skin care rooms, while only 9.6% of them replied that they ever visited them. In the case of visiting skin care rooms, the proportion of the upper class was higher than that of the lower class. 5. According to the frequency of visiting skin care rooms, the proportion of once a week was highest (51.0%). 29.4% of them visited them once per 6 months and 19.6% visited them once a month. 6. In the case of the reasons they did not visit the skin care rooms, the proportion of 'no interest' was highest (36.6%). 23.2% did not visit them because they thought the fee for skin care was expensive and 19.5% did not visit them because they thought the skin care room were only for women. 7. In the variables of giving advice concerning skin care, the proportion of 'their own' was highest (29.8%). The proportion of female family members was 28.2% and the proportion of the girl friend was 27.7%. In the case of the age related to having the girl friend's advice, the proportion of 'over 25 years old' was 31.9% and the proportion of '20 years old to 24 years old' was 26.4%. The proportion of 'less than 19 years old' was 23.5%. The older they were, the more they had the girl friend's advice. 8. According to the sources of getting information on skin care, the proportion of mass media (TV, Radio etc.) was highest (36.7%). 26.0% of them obtained them through the girl friend and 13.9% obtained them through female family members. Only 8.4% got them through magazines. 9. The factors influencing the experience of visiting skin care rooms were experience of side effect of foundation cosmetics, concern about skin care, expiration date of cosmetics or checking of directions of using cosmetics, donsideration of skin character when using soap, and regular exercise for health. From above results, it can be concluded that skin care and beauty specialists working in beauty academies or the department of cosmotology at colleges or universities must make efforts to change the negative recognition of male skin care through deep and comprehensive research. It is also necessary to develop systematic education course and institutionalize the qualification management system.