傳統武藝 단지 조성을 위한 조사 : 한국 골굴사와 중국 소림사 사례 비교를 중심으로 With compared reference of Golgulsa in Korea with Shaolinsi in China

강태호,정길상 동국대학교 관광산업연구소 2000 관광·호텔경영연구 Vol.2 No.1

This is the basic study for service the traditional military arts site in Gyeongju. We've compared Golgulsa(骨堀寺) in Korea with Shaolinsi(少林寺) in China. Shaolinsi is located at Songshan(嵩山), which is one of the five sacred mountains in China. Therefore, it has plenty of cultural properties, which has much values as various resources for sightseeing such as beautiful scenery, miliary arts, history, and religion. Golgulsa has very similar cultural and historical background with Shaolinsi. And its peculiar practicing form Sunmudo(禪武道) interested in by many foreign lover of military arts. The transportational and geographical condition of Golgulsa is better than that of Shaolinsi. They can be so easily connected with the traffic network such as airplane, road, railroad that they can be utilized as resources of sightseeing. Therefore, if we develop the Taekwondo(跆拳道) park area connected with Sunmudo, which is our traditional and Buddhist military arts, as the articles of tourist. It will be much contributed on the development of Gyeongju tourist.

가정학습 가이드를 통한 산수과 학력향상 : 국민학교 산수과 2학년을 중심으로 Forcarized in the 2nd Year Grade in the Elementary School, the Arithematic Course

강용길,이상규 晋州敎育大學校 科學敎育硏究所 1981 科學敎育硏究 Vol.7 No.-

Clay/Epoxy 하이브리드 나노복합재료의 합성

강재현,유성구,서길수 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.2

In this study, octadecyltrimethylammonium ion was intercalated in the gallery space of layered sodium montmorillonite(MMT) via an ion-exchange reaction. The gallery space was further modified by grafting of the aminopropyl groups via a reaction between a octadecyltrimethyl-ammonium-MMT intercalation compound and 3-aminopropyltriethoxysilane(APS) in order to use as a filler for epoxys-clay hybrid nanocomposites. The interlayer modification of MMT was confirmed by XRD, IR, and 29Si MAS NMR. Furthermore, the resulting hybrid nanocomposites were characterized by XRD, transmission electron microscopy(TEM) and scanning electron microscopy(SEM). The results proved that the organomontmorillonite could be exfoliated into ca. 100Å thickness and uniformly dispersed in the epoxy matrix.

Al과 Cu의 마찰용접시 접합부의 기계적 성질

姜聲甫,閔宅基,李光吉 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2

This report deals with the mechanical properties when the friction welding between Al and Cu. Main results obtained are as follows; 1) With welding conditions of 2.6sec heating time, the tensile strength of weld interface was reached at that of Al base metal by 75% 2) The hardness of weld interface is considerably higher than hardness of Al base metal and top hardness of radial direction is at half position of periphery. 3) The structure of the joint was transformed as a fine structure in HAZ of meterials and the finest structure like band by high pressure and plastic deformation in weld interface adjacent to Cu.

Trithioformaldehyde(TTFA)가 백서에서 사염화탄소 투여에 의한 간 손상에 미치는 영향에 대한 형태학적 연구

강병길,김창진,강상균 순천향대학교 1992 논문집 Vol.15 No.2

Carbon tetrachloride is not only toxic to the liver causing centrilobular necrosis and fatty change, but also harmful to the kidney, the lung and the nervous system. It causes hepatic injury constantly regredless of the routes of administration, so that it is used in the animal model of toxic hepatic injury. It is metabolized by microsomal enzyme, cytochrome p-450, to produce trichloromethyl and monoatomic free radicals, which have toxic effects on cell membrane and cytoplasmic organelles. Their toxic effects can be lessened by antioxidant vitamin E or methionine and glutathione Trithioformaldehyde(TTFA) is a synthetic cyclic aliphatic compound containing three sulfur atoms. This study is done to evaluate the protective effects of TTFA on the hepatic injury caused with carbon tetrachloride by light and electron microscopic examination. The results are as follows. 1. TTFA administration increased SGPT and SGOP compared to the control group. 2. Pretreatment of TTFa before carbon tetrachloride administration decreased SGOT and SGPT compared to the carbon tetrachloride alone administration. 3. TTFA administration brought slightly irregular hepatic cell cords light microscopically and dilattion of RER and mitochondria electron microscopically. 4. Carbon tetrachloride administration brought extensive severe centrilobular hepatic necrosis and fatty change light and electron microscopically. 5. Pretreatment of TTFA before carbon tetrachloride administration brought centrilbular necrosis but the fatty change was minimal compared to carbon tetrachloride alone administration. Electron microscopically, the cell necrosis and degeneration were also in lesser degree compared to the carbon tetrachloride alone administration. The above results suggest that TTFA might lessen the hepato-toxic effects of carbon tetrachloride, but further studies are needed to elucidate it.

中風에 活用된 吐法에 對한 文獻的 考察

成彊慶,金世吉 圓光大學校 韓醫學硏究所 1993 원광한의학 Vol.3 No.1

This study has been carried out to investigate the indication of the method of inducing vomiting applied in apoplexy by referring to literatures. The results were as follows : 1. The method of inducing vomiting was applied for the sputum in the upper portion of the body cavity in the early atage of aopolexy based on the therapeutic principle of jumping over the high. 2. The method of inducing vomiting was applied for the obstruction of airways or esophagus with sputum as a first aid to aopplexy based on the principle of treating the outward symptom in the emergency. 3. The method of inducing vomiting was forbidden to the weak. These results suggests that the method of inducing vomiting was applied for the sputum in the upper portion of the body cavity in the early stage of appoplexy and that further study should be ensued.

DES와 RSA의 결합 모델 기반의 채팅 프로그램

길정수,강상엽,권호열 강원대학교 정보통신연구소 2001 정보통신논문지 Vol.5 No.-

With the rapid development of communication technology and widespread uses of internet service, we showed on interest in information security. This environment was required protection of personal information and keeeping of data transmission secure. In this paper, we will enhance safty of RSA and the high speed processing of DES with the system. This chatting program is based on JAVA

구조용강의 유한요소해석 및 온도변화에 따른 피로수명 평가에 관한 연구

이동길,이상열,정재강 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2

본 연구에서는 국산 승용차의 전륜구동축 재료인 S43C와 S5OC를 대상으로 유한요소해석과 회전굽힘피로실험을 통해 고주파열처리와 온도조건에 따른 피로크랙의 발생, 전파거동을 고찰하였다. 유한요소해석 결과 하중이 가해지는 방향에 따라 반복적으로발생되는 인장응격 및 압축응력은 미소원공결함 부분에서 가장 크게 나타났다. 이러한원인은 미소원공결함이 응력의 국부적인 집중원으로 작용했기 때문으로 생각되며, 이러한 응력의 반복으로 인하여 미소원공결함을 기점으로 크랙이 발생∙성장하였음을 알 수있다. 회전굽힘피로실험 결과 두가지 재료 모두 저온(-3O℃) 피로수명은 비열처리재의 경우 상온(25℃)보다 약 110% 증가하였고, 열처리재는 약 120% 증가함으로서 온도의 저하가 피로수명을 크게 증가시킨 반면 고온(80℃) 피로수명은 상온 피로수명과 비교시 비열처리재가 약 35%. 열처리재가 약 5%의 피로수명 감소를 나타냈다. In this study, the rotary bending fatigue test was carried out with two kind of material, S43C and S5OC, using in the front engine and front wheel drive shaft of vehicle. The specimens were heat-treated by high frequency induction method and tested at room(+25℃), high(+80) and low temperature(-3O℃) in order to look over the fatigue crack initiation and propagation behavior by the heat treatment and the temperatures. Based on the FEM result, the tensile and compressive stress repeatedly generated by load direction were largest on the small circular defect due to the stress concentration. So the small crack was initiated and grew from the defect Fatigue lifts of the specimens tested at low temperature showed about 110% for as-received. 120% for heat-treated higher than at room temperature, It was found that low temperature increased so much the fatigue life. At room and high temperature, the fatigue life of as-received specimens were decreased about 35%, but that of heat-treated specimens were decreased about only 5% at high temperature more than at room temperature, Therefore, fatigue life under high temperature will be considered at design of front engine and front wheel drive shaft materials of vehicle.

STR3과 STR35 이종마찰용접재의 피로수명 예측에 관한 연구

이상열,김동길,정재강 朝鮮大學校 機械技術硏究所 2001 機械技術硏究 Vol.4 No.1

본 연구에서는 Ni과 Cr이 많이 첨가되어 있는 오오스테나이트계 스테인레스강 STR35와 Si가 많이 첨가되어 있는 마르텐사이트계 스테인레스강 STR3을 마찰용접하여 모재, 열영향부 및 접합선(bond line)에 인공결함을 가공하여 피로크랙 전파거동을 고찰하였다. 평활재의 피로한도시험 결과 STR3의 피로한도는 429.0MPa이며, STR35는 409.4MPa로서 STR3의 피로한도가 약 20MPa이 높게 나타났다. 실험으로부터 얻어진 재료상수를 이용하여 Nisitani의 피로크랙전파속도 예측식에 적용하여 피로수명을 예측한 결과 마찰용접 및 미소원공결함의 위치에 관계없이 약 5%내외의 낮은 오차를 보이며 잘 일치함을 알았다. The fatigue lifes were investigated and predicted for two kind of heat-resisting steels, STR3 and STR35, to look over the fatigue life of dissimilar friction welding zone by rotary bending fatigue test. The mechanical factor. C(2a)^p. proposed by Nisitani, was employed in the present study to compare the results of fatigue life obtained from experiment and prediction. The fatigue lifes were predicted with an equation of the fatigue crack propagation proposed by Nisitani, d(da/dN)=C(2a)^P, the results were found to be within 5.0% error by comparison with experimented results.

주파수 선택성 다중경로 페이딩 채널에서 Near/Far 영향을 받는 Multi-Carrier CDMA Trellis Coded 16 QAM 시스템의 성능 해석

노재성,강희조,김춘길,김언곤,조성준 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-

본 논문에서는 주파수 선택성 다중경로 페이딩과 Near/Far 영향을 받는 Multi-Carrier CDMA 시스템의 성능을 분석하였다. 성능 분석을 위해 사용한 파라미터들은 Multi-Carrier의 수, 다중사용자의 수, RAKE 수신기의 가지수, 주파수 선택성 다중경로 페이딩의 감쇄지수, 그리고 CDMA 다중사용자의 분포와 세기이다. Multi-Carrier CDMA 시스템에서 Near/Far 영향을 분석하기 위하여 3가지의 간섭 분포 모델을 설정하였다. 첫 번째 모델은 다중사용자가 간섭과 대 반송파 비인 I/C를 -4 dB에서 4dB 사이에서 2dB씩의 차이를 가지며 20%씩 균일하게 분포하는 경우이다. 두 번째 모델은 다중사용자가 I/C 비를 -2 dB에서 2 dB 사잉에서 2 dB씩의 차이를 가지며 33.3%씩 균일하게 분포하는 경우이다. 그리고 세 번째 모델은 모든 다중사용자가 I/C가 0 dB로 신호 전력과 간섭 전력이 동일하게 분포하며 전력이 완전하게 제어된 경우이다. 그리고 본 논문에서는 주파수 선택성 다중경로 페이딩의 영향을 감소시키기 위하여 RAKE 수신기를 채용한 Multi-Carrier CDMA 시스템을 제안하였다. 이 시스템에서는 제시한 3가지의 간섭 분포 모델중에서 세 번째 모델(완전 전력제어가 된 경우)이 가장 좋은 성능을 나타내었고, 간섭파의 전력과 신호파의 전력차이가 적을수록 희망 신호에 영향을 주는 간섭 신호의 전력량이 적어서 Multi-Carrier CDMA 시스템의 성능이 향상됨을 알 수 있었다. The performance of a multi-carrier CDMA system is analyzed considering frequency selective multipath fading and Near/Far effects. The number of multicarrier, multiuser, and arms of RAKE receiver, and the decay ratio of frequency selective multipath fading are used as a parameter for the performance analysis. Moreover, the distribution and the strength of multiuser interference are also considered. To evaluate the Near/Far effects in a multi-carrier CDMA system, three distribution models are assumed. In the first model, Interference to Carrier Ratio, I/C, ranges from -4 dB to 4dB, and at each 2 dB interval, 20% of multiuser is assumed to be uniformly distributed. In the second one, I/C ranges from -2 dB to 2dB, and 33.3% of multiuser is assumed to be equally dispersed at each 2dB interval. The third model is 0 dB of I/c, that is, with perfect power control, multiuser are assumed to be evenly located. In this paper, multi-carrier CDMA system adopting RAKE receiver is proposed to mitigate the frequency selective multipath fading. From the results, the third model(i.e. perfect power control) shows the best perfomance, and the narrower range of I/C causes the less effects to the desired signal, which reads to the better performance.