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신보철,한상오,김주호,송지훈,송근호,이광래 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-
본 연구는 탄산가스화법에 의한 탄산칼슘 입자 제조 공정에 있어서, 탄산가스로 채워진 반응기에 수산화칼슘 슬러리를 분사하는 방법으로 탄산칼슘 입자를 제조하였다. 수산화 칼슘의 농도(0.25~1.0wt%), 분사압력(0.5kgf /㎠~1.5kgf /㎠) 및 반응기 온도(20℃, 28℃)의 변화에 따른 생성된 탄산칼슘을 관찰하였다. 수산화 칼슘의 농도가 비교적 높으면(0.75wt%, 1.0wt%), 생성물의 pH와 전도도는 높게 나타났다. 분사압력에 의한 탄산칼슘 제조의 변화는 분사압력이 높아질수록(1.5kgf /㎠), pH와 전도도는 높게 측정되었다. 그러나, 수산화 칼슘의 농도와 분사압력의 변화가 탄산칼슘의 입자크기, 형태, 결정구조에 영향을 미치지는 않았다. 반응기의 온도가 28℃에서 생성된 탄산칼슘은 1.0㎛이하의 칼사이트 상 입자가 제조되었으며, 20℃에서 생성된 탄산칼슘은 0.5㎛이하의 칼사이트 상 입자가 제조되었다. 반응기의 온도가 낮아질수록 탄산칼슘 입자의 크기가 작아짐을 알 수 있었다. For the preparation of calcium carbonate particles from aqueous Ca(OH)2 slurry, carbonation reaction of aqueous Ca(OH)2 slurry was carried out by spouting the aqueous slurry of Ca(OH)2 into reactor filled with CO2 gas. The concentration of Ca(OH)2 varies from 0.25wt% to 1.0wt%, nozzle pressure from 0.5kgf /㎠ to 1.5kgf /㎠, and reactor temperature were set at 20℃ and 28℃. With relatively high concentration of 0.75wt% and 1.0wt% of Ca(OH)2, pH and conductivity of product-stream were observed high value. High pH and conductivity were observed at high nozzle pressure of 1.5kgf /㎠. The concentration of Ca(OH)2 and nozzle pressure, however, did not change the particle size and shape of calcium carbonate synthesized by carbonation reaction. The reaction temperature affected particle size. At reactor temperatures of 28℃ and 20℃, the particle sizes were about 1.0㎛ and 0.5㎛, respectively. Crystal structure of calcium calcium carbonate was of calcite. When reactor temperature was lower, the size of calcium carbonate particle was smaller.
ALSCAL法에 의한 交通事故 原因認知 및 減少對策 選好모델 構築에 관한 硏究
오석기,고상선 東亞大學校 大學院 1996 大學院論文集 Vol.21 No.-
Such social changes as the change of industrial structure, the expansion of economic scale, the elevationof national life level and rapid motorizaiton bring about social problems that are traffic accident, traffic accident is related with hyman life. Accordingly, this study is essentially for the establishment of acknowledgement model of the cause and preference model of the decrease counterplan of traffic accident using ALSCAL.
오석기,고상선 동아대학교 건설기술연구소 1998 硏究報告 Vol.22 No.1
Noise caused by vehicles has been one of serious problem in the developed cities. Because it can bring physical and spiritual problem to passengers and pedestrians. But vehicles can't be eliminated in daily life as they are closely related to the urban activities. Therefore, this study focuses on the analyzing the effect of noise on road by the using Discriminant Analysis. And the result of this study indicates that noise level should be reduced in order to be achieved more environmentally sound traffic.
항정신병약물로 유발된 추체외로증상에 대한 Amantadine과 Benztropine의 효과비교
오동열,양병환,김상욱 大韓神經精神醫學會 1991 신경정신의학 Vol.30 No.2
Clinically anticholinergic antiparkinsonian drugs are the most commonly used medication in drug induced extraphramidal symptoms treatment, and amantadine, a drug developed as an antiviral agent, also is known to be effective in drug induced extrapyramidal symptoms. A double blind cross-over study was performed to compare the effect between amantadine and benztropine on drug induced exptrapyramidal symptoms. The subjects was 32 female schizophrenic patients who developed exprapyramidal symptoms after discontinuing antiparkinsonian drug medication. The procedure was proceeded for a period of 5 weeks using KiMascio extrapyramidal symptom rating scale and Simpson & Angus extrspyramidal symptom rating scale. The results are as followings; 1) Both amantadine and benztropine had significant effect on exprapyramidal symptoms na dno difference in effectiveness was found between the two drugs. 2) Amantadine and Benztropine were effective in extrapyramidal symptoms from the 1st and 3rd day except for dystonia. 3) Both drug were effective in dystonia, but did not show the significant effect on dystonia as far as duration of use is concerned.
오연호,한성진,주수원 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2
There are increasing needs for high performance small motors using permanent magnets. In this paper, the static characteristics of pm dc motor has been analyzed by finite element method. In the air gap, magnet flux densities due to only field magnet have been calculated, and the effect of armature reaction has been investigated. For torque calculation two dimensional F.E.A. with the integration of Maxwell stress tensor has been applied and show good agreement with experimental result.
오상철,김영호,현종익 濟州敎育大學 科學敎育硏究所 1983 科學敎育硏究誌 Vol.7 No.-
This is a study to develop the obervations and experimental materials for the elementary school 4th.5th.6th grade science curriculum that are carried on effect from this year. The materials which teachers do and the teachers and students can make, by themselves, are as follows: 1) In the field of biology for 4th.5th and 6th grade, 11 kinds of plant observating materials were cultivated. 2) In physics field of sixth units in the text book for 4th.5th and 6th grade, 10 kinds of implements were developed: electric circuit, moving of heat, expansion of heat and body, solute, movement of Earth and Moon, eaergy of Water and Wind.
오상우 圓光大學校 醫科大學 神經精神科學敎室 1996 圓光精神醫學 Vol.12 No.2
이 연구의 목적은 신경정신과 영역의 장해감정과 관련된 심리학적 평가보고서 작성법을 기술하는데 있다. 이러한 목적을 달성하기 위하여 저자는 임상심리학적 평가에서 측정할수 있는 내용, 심리학적 평가를 의뢰하는 방법, 임상심리학적 평가보고서에서 밝혀야 할 내용, 그리고 임상심리학적 평가보고서의 인용시 주의할 점 등을 순서대로 서술하였다. The purpose of this study was present psychological assessment report writing used for disability evaluation in the neuropsychiatric field. In order to do so, we described contents of psychological assessment, the method of refer, contents of psychological assessment report writing and notice.