Coliform菌의 IMViC 性狀에 關하여

石鍾聲,文治甲,朴元喆,李承達 한국의 현대의학사 1970 한국의 현대의학 Vol.2 No.1

R형 보강재로 보강된 복합적층 원통형패널의 최소중량화설계

원종진,이종선,홍석주 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

This study is simulation about buckling behavior under axial compression which is cylindrical panel laminated USN125 and USN 150 made by various winding angle.And also this study compare with linear and nonlinear FDEM theory, and FEM theory.To solve the objective function and the design variables, this study use the linear and nonlinear buckling theories of FDEM and nonlinear search optimum design method of ADS for minimum weight design on which stiffened laminated composite cylindrical panel with stiffener that R-type section.

연속주조 몰드의 구조해석

원종진,이종선,홍석주 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.4

The objective of this study is structural analysis of continuous casting mold. A two-dimensional finite element model was developed to compute the temperature distribution, thermal stress and thermal strain behavior for continuous casting mold. Structural analysis was made using thermal analysis result, utilizing transient analysis of ANSYS. This structural analysis results, many variables such as casting speed, cooling condition, film coefficient, convection and load condition are considered.

충남 보령지역에 분포하는 흑색 셰일의 암석학적 특성

최석원,김경진 公州大學校 基礎科學硏究所 1999 自然科學硏究 Vol.8 No.-

충남 보령시 일대에 분포하는 대동추능군내 흑색 셰일은 벼루등의 석재자원으로 이용된다. 흑색 셰일내에는 결핵체가 산출되기도 한다. 흑색셰일을 대상으로 한 석재광산위치와 채석대상지층은 수부리지역의 성주리층, 성주리및 평리지역의 백운사층, 개화리지역의 백운사층, 도화담리지역의 아미산층 중부셰일대 등이다. 그러나 현재 가행중인 곳은 아미산층인 도화담리지역과 백운사층인 성주리와 평리지역뿐이다. 흑색 셰일의 화학성분분석 결과 SiO₂의 평균함량은 61.97wt.%, Al₂O₃는 19.04wt.% 이었다. 흑색셰일의 구성광물은 석영, 장석이며 교결물질로 견운모, 녹니석, 불투명광물 및 유기물질을 포함하고 있다. 셰일은 Fe셰일과 일반세일로 되어있다. 물성실험결과, 셰일은 비중 : 2.40-2.57, 공극율 : 1.06-2.74%, 흡수율 : 0.41-1.06%, 압축강도 : 730-1140kg/cm², 인장강도 : 130- 180kg/cm²이고 마모경도는 34-52였다. The Black-shale of Daedong Supper Group in Boryeong area, Chungnam is used to make stone resources such as inkstones, etc. Concretions occasionally are found in the Black shale. Location of black shale mines and Formation are Seongjuri Formation of Suburi area. Baegunsa Formation of Gewhari area and middle zone of Amisan Formation of Dowhadamri area etc. But presently, progressing mines are Amisan Formation of Dowhadamri area and Baegunsa Formation of Seongjuri area. As the results of chemical analysis of the black shale, average content of SiO₂is 61.97 wt.% and Al₂O₃is 19.04 wt.%. Compositional minerals of the black shale are quartz and feldspar, including cementational materials which are sericite, chlorite, opaque mineral and organic matters. The shale is classified into Fe-shale and general shale. As the result of physical properties, the Black shale shows that specific gravity is 2.40 - 2.57, porosity is 1.06-2.74%, the modulus of absorption is 0.41 - 1.06%, the compression strength is 730 - 1140 kg/cm², the tension strength is 130 - 180 kg/cm² and abrasion hardness is 34-52.

제주도 화산암의 지구화학적 특성

최석원,손인석,신현완,이찬희 公州大學校 基礎科學硏究所 1999 自然科學硏究 Vol.8 No.-

제주도 화산암의 지구화학적 특성을 규명하고자 제주도를 네 지역으로 나누어 지표조사, 시료채취 및 화학분석을 실시하였다. 제주도 전역에서 채취한 31개의 화산암시료(북동지역 11점, 북서지역 6점, 남동지역 7점, 남서지역 7점)는 알카리계열의 알카리현무암과 하와이아이트, 비알카리 계열의 쏠리아이트로 분류되었다. SiO₂ 함량범위는 46.27~52.43을 보인다. 암종별함량은 각각 알카리현무암 46.27~50.92, 하와이아트 47.30~50.45, 쏠리아이트 51.09~52.43을 보인다. MgO(wt.%) 함량범위는 알카리현무암 5.37~10.73, 하와이아이트 1.95~7.41, 솔리아이트 6.40~7.94이며, 특징적으로 솔리아이트는 작은 MgO폭을 보인다. MgO주성분원소 관계도에서 MgO가 감소하면서 SiO₂, Al₂O₃, K₂O, ?? 증가하나 Fe₂O₂, CaO함량은 감소한다. MgO미량원소 관계도는 MgO 함량이 증가하면서 호정성원소 (compatible element)인 Co, Cr, Ni, V는 강한 증가폭을 보인다. 지역에 따라 원시맨틀 값으로 표준화하면 하와이아이트, 알카리현무암, 솔리아이트 순으로 높은 값을 보였고, Rb에서 Yb로 갈수록 기울기가 점점 감소하였다. 이런 양상은 동일마그마에서 단순한 분별결정분화작용을 일으킬 때 보이는 일반적인 경향이다. 운석값의 표준화도에서 하와이아이트, 알카리현무암, 솔리아이트 순으로 높은 값을 보였고, 전체적으로 LREE가 HREE에 비해 부화되어 있다. 이와 같은 경향은 동원마그마에서의 분화과정을 시사해주는 것이다. Though many geologists have studied for the Cheju Island, only a few synthetic studies for all parts of Cheju Island have been done. In this study petrological descriptions and geochemical characteristics and whole rock analysis for 31 samples of volcanic rock from Cheju Island were carried out. The volcanic rocks of surveyed area were classified into alkali basalts, hawaiites, and tholeiites of subalkaline series. The contents of SiO2 for total volcanic rock samples are 46.27 to 52.43 wt.%. Each SiO2 is alkali basalts 46.27 to 50.92 wt.%, hawaiites 47.30 to 50.45 wt.%, tholeiites 51.09 to 52.43 wt.%. The contents of MgO for total volcanic rock samples are 5.37 to 10.73 wt.%. Each MgO is alkali basalts 5.37 to 10.73 wt.%, hawaiites 1.95 to 7.41 wt.%, tholeiites 6.40 to 7.94 wt.%. According to incompatible elements, normalized values that hawaiite is high and tholeiite is low was seen. And then, this kind of magma generally produce simple fractional differentiation. Rare earth elements also shows that the volcanic rocks from Cheju Island were differentiated from the co-genetic magma.

면역억제제를 사용치 않은 동소성 간이식 실험견의 조직병리소견

조원현,최순옥,김인호,임태진,김성수,박준희,김우석,김현철,최규택,김진모,권건영 大韓移植學會 1994 Korean Journal of Transplantation Vol.8 No.1

실시간 촉각처리 시스템

강원찬,신석두,김영동 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

In this paper, We have developed the high-speed controller for haptic control. The proposed controller is based on the PCI/FPGA technology, which can calculate the real position and transmit the force data to device rapidly. The haptic system is composed of 6DOF force display device, high-speed controller. The developed system will be used on constructing the dynamical virtual environment. To show the efficiency of proposed system, we designed simulation program of force-reflecting. As the result of the experiment, we found that the controller has much higher resolution than some other controllers. The system is so efficient in a 1 PC-based system with l[kHz] haptic interrupt cycle.

GIS를 이용한 부여 서부지역의 산사태 연구

최석원,박하나,정승균 公州大學校 基礎科學硏究所 1997 自然科學硏究 Vol.6 No.-

지구정보시스템(GIS)을 이용하여 충청남도 부여군 서부지역의 산사태 발생 가능성을 분석하였다. 산사태 취약성 분석을 위하여 산사태 발생에 영향을 미치는 사면경사, 토양침식율, 지질, 토지이용도 등과 같은 환경지질학적 요인들을 선정한 후 산사태 발생지역에 대한 통계분석을 행하였다. 분석 결과를 이용하여 database를 구축하고 각각의 자료들을 중첩시켜 산사태 취약성 지수(LSI)를 산출한 다음 이 지수와 분포 면적에 대한 누적곡선을 작성하여 산사태 취약성도를 작성하였다. 산사태 취약성은 연구지역 남쪽과 북쪽 경계부, 그리고 은산면 중앙부 지역에 매우 높게 나타났으며, 은산면 북서쪽과 내산면 일대는 비교적 높은 산사태 취약성을 보였다. 그러나 규암면 일대와 구룡면, 옥산면을 잇는 수계하천을 따라서는 산사태 취약성이 매우 낮게 나타났다. This study used GIS to analyze the possibility of landslide occurrence in the western part of Puyeo-kun, Chung Nam Province. For the regional analysis of landslide, environmental and geological factors such as topographic slope, soil erodibility, geology, landuse which have influence on the landslide occurrence were extracted, and then analyzed statistically for the area of landslide occurrence. With the result obtained by statistical analysis, databases were constructed. LSI were calculated by overlapping each factor. Landslide susceptibility map was obtained by use of LSI and cumulative curve of area. The results of this study show that each border of the south and north regions and the center of Eunsan-myeon have the very high susceptibility and northwest of Eunsan-myeon and side area of drainage between Gurong-myeon and Oksan-myeon have the very low landslide susceptibility.

구리이온을 도입한 Acrylonitrile-Acrylic Acid계 공중합체의 도전성에 관한 연구

손원근,맹기석,김동철,송해영 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.2

The AN-AA copolymer-Cu(Ⅱ) and Amidated AN-AA copolymer-Cu(Ⅱ) complex were the most stable in the pH range of 9. The morphology of Cu(Ⅱ) complex and CuxS-induced had changed into compact form. The thermal stability for Cu(Ⅱ) complex and CuxS-induced had been determined through DTA and TGA measurement. As result, it has been observed that thermal stability for Cu(Ⅱ) complex were stabilized less than that of copolymer. The Cu(Ⅱ) complex exhibited surface resistivity around 10Ω㎝ when modified iodine in acetone. The resistivity was significantly affected by the amounts of added cupric chloride, iodine and results were statisfactorily obtained by adding more than 20wt% of Cupric chloride and about 1.0wt% iodine. The optimum condition for the introducing of CuxS was at the CuSO₄concentration of 30g/ℓ and the reaction time of 3hrs. The CuxS-induced electrical conductivity of copolymer was higher by order of 10 than that of the Cu(Ⅱ) complex.

第五次 敎育課程에 의한 地球科學 敎科書의 實驗內容 分析 硏究

崔錫源,張來喆 공주대학교 사범대학 과학교육연구소 1989 과학교육연구 Vol.21 No.1

The aim of this study is preparing materials to induce Earth Science teachers to instruct their students through research method. The method used in this paper is to analyze and compare the contents of the experimental parts in highschool Earth science textbooks in 5th curriculum which will be published in 1990 in Korea. This specific procedure is as follows; 1) To compare the number of experiments adopted in every textbooks(the number of experiments in each textbook and in chapters of every textbook). 2) To find out the errors by making each experiment in the every textbook. 3) To grope for new effective experimental methods. The result of the study is as follows; 1) The number of the kinds of experiments is 67 in 2nd volume of Science 1 and 45 in Earth Science. 2) The contents of experiments in every textbook are from one another. 3) The disposition of the experiments in every chapter is unbalanced. 4) Sixty percent of the total number of experiments is adopted in only one textbook. 5) The number of experiments that need to be correct is 23 percent in Earth science while 18 percent in the 2nd volume of Science 1.