신경회로망에서 뉴런간의 연결도를 이용한 4백 배치 문제 해결 알고리즘

현해진,김덕주,강부식,이기태,임재윤 濟州大學校 工科大學 産業技術硏究所 1993 産業技術硏究報告 Vol.4 No.-

In this paper we have proposed a method for solving a four-coloring problem using adjusted information transmission between adjacent neurons in neural networks. These algorithms are based on McCclloch-Pitts binary neuron model neural networks. If a map shares n regions, a 4×n neural array is used to color a map of n regions where each neuron as a processing element performs it. By programming these algorithm by a C-language in IBM PC 486 DX and adapting it to various examples, we have showed the ability of our system. If one neuron is selected among four neurons, the strength of order three neurons is wakened. So, by transmitting the information of selected neuron, adjacent neurons cannot share the same color.

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅰ : 모델링에 관한 연구 A Study on the Modeling

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.6

We have developed the exclusive CAD/CAM system for the machining of impeller blades. This study is about the modeling method for the effective machining of impeller blades formed by ruled surface. As the impeller is consisted of boss part and blade part, the boss is modeled by rotational surface of hub curve on z-axis and the blade is described by ruled-surfaces between hub curve and shroud curve. This modeling process can be carried out on the software developed in this study. And, the developed software can describe the impeller as a solid model through interface with Solid-Works software. The developed software containing the interface method proposed in this study was very effective for impeller modeling.

醫療紛爭調停法案에 대한 檢討

김진현,반덕진 인제대학교 1992 仁濟論叢 Vol.8 No.1

The number of disputes between physicians and patients caused by medical malpractice has showed a sharp increase for the past several years. Medical malpractice may be resolved either in court or by direct negotiation between both sides concerned. However, most of the medical disputes in Korea have been resolved merely through legal technicalities without reference to actual medical practice. Recently medical disputes are showing the aspect of collective showdown between medical doctors and patients. Keeping in mind that medical disputes are sharply increasing and getting more and more serious, government proposed a new system or the Mediation Law of Medical Malpractice Disputes. However, it was critisized to be pro-doctors. The new system has no special acts that demand the civil or penal liability of physicians. This paper discusses some issues mentioned above. Key Word : Malpractice, Medical Dispute

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅱ : 5-축 가공에 관한 연구 A Study on the 5-Axis Machining

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3

This study is continuous with the study 1 (A Study on the Modeling) and the sample impeller of this study is defined by the modeling process of the exclusive CAD/CAM system developed in the study I. And, this study describes a method for the 5-axis machining of impeller blades formed by ruled surface. Therefore, the exclusive CAD/CAM system is the software for modeling and machining of impeller blades. By using the machining method suggested in this study, we could manufacture impeller blades on 5-axis CNC machining center and the machined impeller was very agreeable to the designed impeller. Thus, theories proposed in this study can be very useful for the 5-axis machining of impeller blades.

4방식 조향장치를 적용한 관리 작업차 개발 Ⅰ : 동력전달 시스템 개발 Development of Power Train System

조현덕 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.1

The working tractor of this study, an agriculture machine, is consisted of 4 wheel driving system with gear trains and 4-type wheel steering system. Since technological regions for 4 wheel driving system and 4-type wheel steering system are some large, we divide on two studies on 4 wheel driving system and 4-type wheel steering system. This study develops transmission and axle that are very important units for strong working operation because the power of tractor is largely affected by transmission and axle. Even if the development of the power train is some common technology, it is very complicated work and needs many experience know-hows. So, for new given specifications fitted to the working tractor, a kind of new agriculture machine, this study draws out processes that are development of assembly drawing and strength analysis through classical method and CAE software for all internal parts and housing cases.

산부식 법랑질의 타액오염에 의한 bracket 결합력 효과에 관한 실험적 연구

김현덕,김정기,김오환 全北大學校 齒醫學硏究所 1993 전북치대논문집 Vol.11 No.1

The purpose of this study was to determine the effect of salivary contamination of etched enamel on shear bond strength of a bracket adhered to etched enamel. Eighty extracted human permanent premolars were used in this study. These samples were divided into two groups. Buccal surface of samples were etched in vitro with 38% phosphoric acid for 15 seconds and 60 seconds. Each group was divided into four subgroups. Etched enamel surfaces were contaminated with saliva for 0, 1, 20, 60 seconds, washed and dried. Test surfaces were examined using scanning electron microscope (SEM). The shear bond strength of each sample was determined with a universal testing instrument (Instron Co. Model 4201). Results were as follows. 1. Salivary contamination for 1, 20, 60 seconds did not affect shear bond strength when compared with the uncontaminated enamel group. 2. There was no significant difference (P>.05) in shear bond strength between 15 sec. and 60 sec. etching in uncontaminated enamedl groups. 3. When samples were examined using SEM, organic materials coated enamel surface masked the etched pattern partially.

미러 타입 컨쥬게이트 캠의 설계와 가공에 관한 연구

조현덕,김유종,용부중,동유게 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2

A mirror cam mechanism, a kind of conjugate cam mechanism, consists of two cams, two rollers, and two links. Since profiles of two mirror cams are identical, a simultaneous machining of two cams is achievable. Some machining errors on cam profiles do not result in the internal acting force, which often causes problems in high speed cam mechanism, between two links. Also, since angular accelerations of two links are same, the internal acting force by the difference of the angular accelerations does not occur in the mechanism. Thus the mirror cam mechanism is very useful in high speed machinery. This paper studies a design method as well as a machining method, and develops an exclusive CAD/CAM software for mirror cam profiles. The developed CAD/CAM software is applied to a typical mirror cam mechanism, and a mock-up equipment is built in order to test the machined mirror cam. Experimental investigations show that the contact between cam surface and roller surface according to cam rotation agrees well with the simulation on the developed CAD/CAM software.

한국시장에서 종합상사와 쇼오고쇼사의 경쟁력 비교

趙顯德,趙東成 韓國國際經營學會 1992 國際經營硏究 Vol.3 No.1

최근 대일 무역업개방에 즈음하여 개방의 시기와 그 적절성에 대한 논의가 활발히 진행되고 있다. 그리고 그 논의의 촛점은 한국종합상사와 일본 종합상사의 경쟁력 비교로 모아지고 있다. 따라서 본 연구에서는 한국종합상사와 일본종합상사의 한국시장에서의 경쟁력을 비교하기 위하여 다음과 같은 연구를 진행하였다. 첫째, 종합상사에 대한 기존의 정의를 연구목적에 알맞게 수정하여 제시하고 둘째, 산업의 규제경쟁력 평가모형을 수정해서 종합상사의 국제경쟁력을 평가하기 위한 모델을 설정하고 한국시장에서 기업활동을 수행하고 있는 한국종합상사와 쇼오고쇼사의 경쟁력을 분석하였다. 마지막으로 이러한 분석에근거하여 한ㆍ일 종합상사 사이의 경쟁력의 차이를 결론으로 도출하고 한국종합상사의 경쟁력 제고를 위한 제안을 언급하였다. 한ㆍ일 종합상사의 경쟁력비교 평가결과 일본상사 서울지점의 경우 단계별 시장개방과 자본자유화를 고려하더라도 경쟁력 평가요소 가운데서 경영환경과 정치가 및 행정관료 요소를 제외한 7개 요소에서 한국종합상사에 비해 경쟁적 우위에 있는 것으로 평가되었다. 이러한 평가에 근거할 때 대일 무역업개방에 대비하여 한국종합상사의 경쟁력제고를 위한 정부, 기업의 역할이 시급하다고 판단된다.

제주마의 번식과정에 있어서 혈중 Steroid Hormone수준변화에 관한 연구 Ⅲ : Ⅲ. PGF_(2)α처리에 의한 무발정 제주마의 치료효과

장덕기,양기천,김중계,서문현 제주대학교 농과대학 제주도축산문제연구소 1991 畜産論叢 Vol.6 No.1

The effects of PGF_(2α) on the conception rate and the plasma levels of estradiol- 17β and progesterone of anestrus Cheju mares were investigated at the breeding and non-breeding seasons. The results obtained from this studies are as follows; 1. The durations of the estrus and diestrus after PGF_(2α) treatment persisted shorter than control cycle (p<O.05), but ovulation time was fast. 2. The levels of estradiol-17β and progesteron before PGF_(2α) treatment showed 103.8pg/ml, 8.Ong/ml in breeding season and 72.8pg/ml, 4.7ng/ml in non-breeding season, respectively. 3. The levels of estradiol-17β rose to 115.4-154.Opg/ml. and 90.8-127.Opg/ml from 2nd to 6th day after the treatment of PGF_(2α), in breeding and non-breeding seasons, respectively, while progesterone level dropped to Ing/ml with the sign of estrus and at 8th day rose in breeding season (p<O.05) 4. Of thirty anestrus mares investigated for PGF_(2α) administration, 87.5% showed estrus on an average of 3.8 days after treatment and the conception rate was 62.5% in breeding season, but the estrus and conception rates dropped 40%, and 20% in non-breeding season, respectively.

항암화학요법을 받는 암 환자에 대한 Nucare^R의 영양지지효과

조덕연,김현수,곽상혁,강정현,김철희,배광봉,김종숙,박상준,윤환중,김삼용 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

Purpose : The purpose of this study was to evaluate the effect of nutritional support with enteral liquid supplement in cancer patients receving chemotherapy for possible benefit in nutritional, immunologic and golbal function of patients. Patients and Methods : From October 1995 to February 1997, 30 advanced cancer patients receving chemotherapy were divided two roups. The Nycare group, in addition to normal diet, Nucare^R enteral supplement was given for 1week right after chemotherapy for the duration of 2 chemotherapy cycles. Control group received only normal diet without parenteral fluid supplement for 2 chemotherapy cycles. Results : Median ages were 53 end 56 years for Nucare group and Contrl group respectively. Performance scores was less than 2 by ECOG scale. All patients were stage Ⅲ or Ⅳ. The physical parameters, such as weight, arm muscle circumference(AMC) and triceps skin fold(TSF) were decreased in both groups after 2 cycles of anticancer therapy. but it was less severe in Nucare group(p<0.05). Serum transferrin was maintained in mild deficit state in Nucare group, whereas it aggravated form mild to moderate deficit in Control group(p<0.05). Serum albumin level increased in Nucare group without statistical significance. but it decreased from normal to mild deficit in Control group. Serum total protein did not change significantly in Nucare group. but in Control group, serum total protein was decreased from 7.24±0.9 to 6.52±0.5(P<0.05). Total lymphocyte count did not change significantly in both groups. Conclusion : This study shows that the nutritional support with Nucare^R was effective in the prevention of nutritional deficit status in patients receving a nticancer chemotherapy.