전처리 환경조건 변화에 의한 국내산 크라프트지의 물리적 특성 평가

김형진,최원정,최형기 한국공업화학회 2003 응용화학 Vol.7 No.2

This study was carried out in order to evaluate the physical properties of domestic kraft paper according to the changes of pre-conditioning environmental conditions. For the testing of physical and mechanical strength of paper, the specimens must be preconditioned under the specific environmental factors, such as temperature and RH. Recently, Korean Industrial Standard is revising for the coincidence with International Standard Organization. In this study, the physical and mechanical properties of kraft paper were considered by the two kinds of standard, KS M7011 and ISO 187, and evaluated by the linear regression equation.

개솔새(Cymbopogen tortilis) 精油가 胃液分泌 및 胃運動에 미치는 影響

朴駿瀅,鄭基坤 慶北大學校 1984 論文集 Vol.38 No.-

Cymbopogen tortilis is native weeds which is widely distributed in Korean fields and mountains and its flower contains a strong aromatic essential oil. It is known that the essential oil of Cymbopogen tortilis contains borneol, cadinene, camphene, and elemicin etc. But, there is no report about the effect of essential oil of Cymbopogen tortilis or its constituents on the gastric secretion and the gastric motility. To examine the effect of essential oil of Cymbopogen tortilis on the gastric secretion in rats and the gastric motility in pigeons, this paper was investigated. The results were as follows. The intraperitoneal administration of 1% essential oil solution of Cymbopogen tortilis at the ratio of 1.0ml, 0.5m1, 0.25ml/l00g B.W. to rat reduced their average gastric secretion volume to 2.1±0.29m1, 4.4±1.02m1, and 4.7±1.04ml respectively. In contrast to 9.5±1.3m1 of control rat's secretion. these numbers show 77.89%, 53.68% and 50.53% of gastric secretion inhibition rate. In pigeons, transient gastric inhibition which can be divided into 2 types was observed by the intraperitoneal injection of the drug at the same ratio to that of rats. In one type, gastric motility was inhibited in the state of transient gastric relaxation after drug administration, it recovered to normal with time. In the other type, gastric motility was inhibited transient gastric relaxation, soon its tone moved into contraction state, maintained this condition for some time, and this condition gradually recovered to normal. In conclusion, the essential oil of Cymbopogen tortilis inhibits strongly gastric secretion in rats and transiently gastric motility in pigeons.

2축 서보시스템을 위한 위치제어장치 설계

김기택,김형중,장석호 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

In this study, we design a position controller or two axis servo system.The position controller performs numerical control(NC)to DC or AC servo motor or step motor, and also has a digital input output sequence capability. The control program composed of position and sequence command, which is called channel, is programed easily and user interactivtively. And it is interpreted and the straight line and are position command iinterpolated . We develop the Z80 microprocessor based system and the software with assembly and Clanguage, and also PC based graphic simulator for the debugging and educational purposes.

섭동계수를 갖는 단일 자기부상 시스템의 강인한 제어기 개발에 관한 연구

이형기,변기식,신춘식,탁한호 釜山工業大學校 1991 論文集 Vol.33 No.-

A EMS(Electro Magnet Suspension) nonlinear system is linearized by using Taylor series expansion around nominal point. A method of stability analysis for a low-order characteristic equation with perturbed coefficients is proposed. A PID controller to the linearized EMS system is designed by the method. Computer simulations are carried out in the system with the controller for various masses.

신체적성 운동 프로그램의 참여가 성장기 아동의 체력 및 형태적 요인에 미치는 영향

김형돈,김명진,배기창 경희대학교 사회체육연구소 1996 體育科學論叢 Vol.- No.9

This study has analyzed the relativity between the physical constitution and strength by comparatively analyzing the difference between the group of 59 male and female infants which has been participating at the periodical physical aptitude program and the one of 59 male and female infants which has been taking part at art program in order to examine the effect of physical aptitude program to the physical constitution and strength. The following conclusions have been reached under the above analyzed results: 1. In the comparison of physical constitution between the group received the physical exercise and the one not received the exercise has shown that both the height and breast of the male infants showed significant difference by(p<.01) in height and(p<.05) in the breast while very high significant difference in height by (p<.001) of the female infants. This analysis has shown that the group of having exercised showed high. 2. In the comparison of physical strength, the boy infants showed very high difference in V- sitting and 25meter run by(p<.001) that the exercised group showed good records while the female infants very high significant difference in standing up and sitting by (p<.01), in 25 meter run significant difference was appeared by (p<.05) and significant high difference in round run by (p<.001). It gives us the information that the more they have exercised the better they got the records. 3. The relativity between the male and female infants in physical constitution and strength, there appeared high relativity in the height, the standing broad jump by (p<.05), in 25 meter run (p<.01), round run (p<.001) and in the weight, rising and sitting (p<.05), round run (p<.05) and in the breast, 25 meter run (p<.01) and round run (p<.01) and in sitting height, the balancing with one leg (p<.05). Other events showed no relativity.

실리카 입자를 함유한 광경화형 도료 물성

홍진후,주형태,김순기,김석찬 조선대학교 생산기술연구소 2004 生産技術硏究 Vol.26 No.1

We investigated the effects of nano-silica on the kinetic and film properties of UV curable coatings. Coating properties such as hardness, gloss, chemical and stain resistances and adhesion of the UV cured films containing various concentration of nano-silica were investigated. The matting, pencil hardness, chemical resistance, and abrasion resistances were apparently improved Via addition of nano-silica. Pendulum hardness was also enhanced with the increasing content of nano-silica up to 5 weight percent. However, the pendulum hardness and the adhesion decreased as nano-silica content increased above 10 weight percent. DPC analysis revealed that the presence of nano-silica in UV curable coating formulation enhanced photo curing. It was demonstrated that hardness. abrasion resistance, and chemical resistance of UV cured film can be increased without loss of optical properties through nanocomposite.

Si 웨이퍼 내의 깊은 준위 분포 특성 파악에 관한 연구

홍창희,윤기정,안기형 동아대학교 공과대학 부설 한국자원개발연구소 1988 硏究報告 Vol.12 No.2

Distributions of deep levels are studied in the n-type Si wafer which are introduced during fabrication with e-beam deposition by using DLTS technique. Test is carried out on the Schottky diode. Metalization of the diode is done by e-beam deposition before of after electron irradiation. Deep levels of the defects are measured by using various metal such as Pd/Au, Au, Pd, Ti, Mo and Hf, and by changing the annealing temperature. It is approved that some defects are introduced in the neighbor of interface of silicon and metal by e-beam deposition, and main defect of them is E(0.42) level. In the resuts, two types of the deep level are observed ; one type is that is independent of electron irradiation, for example, E(0.42) level which is observed near the interface ; another type is that is observed only in the diode deposited by e-beam after electron irradiation, for example, E(0.18) level and so on which are observed farther from the interface. It may be the reason that interaction is presented between defects from Pd, at least, and prior defects.

3차원 콘빔CT 영상에서 형성한 2차원 정모두부방사선사진영상의 정확도 증진을 위한 두부자세재현기의 효과

선민규,엄기수,조진형,황현식 대한치과교정학회 2009 대한치과교정학회지 Vol.39 No.5

Objective: The purpose of the present study was to evaluate the effectiveness of the use of Head Posture Aligner (HPA) during cone-beam computed tomography (CBCT) scan in generation of frontal cephalograms using 3D CBCT images. Methods: CBCT scans and frontal cephalograms were made in 30 adult individuals. While a couple of CBCT scan was made for one subject, one was made with conventional method, without use of HPA, the other was acquired with the use of HPA. After creation of virtual frontal cephalogram from each 3D CBCT image, it was traced and compared with the tracing of real frontal cephalogram. Results: In the comparison of the measurements, the virtual cephalograms with the use of HPA did not show statistically significant differences with the real cephalograms whereas the virtual cephalograms without the use of HPA presented significant differences with real cephalograms in many measurements. In the correlation analysis with the measurements of the real cephalograms, the virtual cephalograms with the use of HPA showed higher correlations in all measurements than the virtual cephalograms without the use of HPA. Conclusions: Measurements from CBCT-generated cephalograms become similar to those from real cephalograms with the use of HPA during CBCT scan. Thus, the use of HPA is suggested during the CBCT scan in order to construct accurate virtual frontal cephalograms using 3D CBCT images. 본 연구는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 두부자세재현기(Head Posture Aligner, HPA)를 이용한 경우와 이용하지 않은 경우를 비교분석함으로써 HPA의 유용성을 평가하기 위하여 시행되었다. 성인 30명을 대상으로 먼저 일반적인 방법으로 콘빔CT 영상을 채득한 후 HPA를 이용하여 일정한 두부자세를 재현한 상태에서 또 하나의 콘빔CT 영상 및 정모두부방사선사진을 촬영하였다. 3차원 영상프로그램을 이용하여 HPA를 이용하지 않은 경우와 HPA를 이용한 경우 각각에서 2차원 정모두부방사선사진영상을 형성한 다음 각각의 투사도를 작성하고 실제로 HPA를 이용하여 촬영된 정모두부방사선사진 투사도와의 차이를 비교하였다. 거리 및 각도를 나타내는 여러 계측치를 비교분석한 결과 HPA를 이용하지 않은 경우에는 다수의 계측항목에서 실제 정모두부방사선사진과 유의한 차이를 보인 반면 HPA를 이용한 경우에는 모든 항목에서 통계적 유의차를 보이지 않았다. 아울러 실제 정모두부방사선사진과의 상관관계를 알아보기 위해 상관분석을 시행한 결과 HPA를 이용한 경우가 그렇지 않은 경우보다 모든 항목에서 높은 상관성을 보였다. 본 연구 결과는 3차원 콘빔CT 영상을 이용하여 2차원 정모두부방사선사진영상 형성 시 정확한 영상 획득을 위해서는 콘빔CT 촬영 시 HPA의 사용이 필요함을 시사하였다.

Content-based Retrieval Method using Wavelet Transform and Correlation

Gi Hyoung Yoo,Ga Woon Ban,Jeong Ho Park,Mun Ho Kil,Min Sheik Park,Jae Ho Choi,Hoon Sung Kwak 대한전자공학회 1998 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

The Legal Framework of the Gaesung Industrial Complex

( Gi Hyoung Oh ) 서울대학교 아시아태평양법연구소 2006 Journal of Korean Law Vol.5 No.1

Since the 2000 inter-Korean Summit, the two Koreas have continuously carried out the Gaesung Project while overcoming some challenges. At the outset of the Gaesung Project, North Korea’s military objected to opening the Gaesung by reason of the military defense line. North Korea made the decision to open the Gaesung toward South Korea to revitalize its economy by persuading its military to tolerate the Gaesung Project. Meanwhile, in the summer of 2002, when the two Koreas began to move ahead with the Gaesung Project by re-connecting the inter-Korean expressway and railroad crossing the DMZ, the United States strongly resisted the two Koreas’ attempts. Immediately afterwards, the two Koreas agreed on a detailed schedule for the reconnection of the inter-Korean expressway and railroad and North Korea designated Shinuiju, Kumgangsan and Gaesung as special economic zones. To date, the two Koreas have established, through painstaking negotiations, the foundational work for the Gaesung ICZ’s legal system. This article attempts to investigate the legal framework of the Gaesung Industrial Complex, focusing on the Gaesung Industrial Complex Zone Law enacted in 2002. After conducting a detailed discussion on the various aspects of the law such as the administrative structure, foreign currency control and taxation, the author looks into the factors that are necessary for the successful development of the Zone.