자기공명영상을 이용한 정신분열병 환자의 뇌량크기 측정

성상율,구자섭,조근호,원승희,이종훈,박종한 대한생물치료정신의학회 2004 생물치료정신의학 Vol.10 No.1

Objectives : Nowadays many studies with MRI have reported structurai abnormalltles of corpus callosum of schizophrenic patients. However, the results are various and inconstant. In this study, we attempted to identify structural change of C O ~ U S cailosurn. Method : We measured the size of corpus callosum of the 24 schizophrenia patients (male 11, female 18) who were diagnosed by DSM-IV (19943, visited at department of psychiatry, catholic university hospital of Daegu from January 2002 to December 2003, by using midline sagittal slice of MRI. These results were compared with the size of corpus callosum of 25 controls (male 7, female 78). We divided corpus callosurn into 7 areas. We calculated and compared the areas of each subregion, mid-sagittal cerebral area, and entire corpus callosum. The results were analyzed by independent t-test. Result :When we compared subregion to corpus callosum adjusted wth mid-sagittal cerebral area, schlzoph-renia patients had significantly smaller genu (1.64k0.32 vs. 1.43k0.26 p<O.O5) and splenium (2.16f0.27 VS. 1.96+0.30 ; ~(0.05). Similarly, the ratio of total corpus callosum to midline sagittal cerebral area (%)(7.50*0.72 vs. 6.90t0.82 ~(0.05) was significantly smaller In schizophrenia than control group. Conclusion : In this study, we found significant differences in corpus callosum between schizophrenic patients and normal control group.

모래의 비배수 반복비틀림 전단시험에 관한 실험적 연구

成昌煥,徐祥烈 영남이공대학 1997 論文集 Vol.26 No.-

The results obtained from undrained torsional shear test for saturated sand lead to the following conclusions. 1. In the case of monotonic undrained torsional shear test, the more loose sand has, the more maximum excessive pore water pressure happens on a large scale. At that time, large shear strain happens. Also, in the case of one directional monotonic load, there is some possibility for a liquefaction to happen. 2. In undrained cyclic torsional shear test, if strain begins to generate, a loose sand comes to the liquefaction. In a dense sand, the behaviour of a rapid increase of strain is not shown. 3. According to the result compared constant volume test and undrained test, a difference of increased amount of pore water pressure by unloaded process in both tests is a little large. If the liquefaction strength is judged from increase of pore water pressure, loading number in the former is decreased by about 40%.

세그멘트 폴리우레탄 우레아에 기초한 블렌드계 고체전해질의 분자운동성과 이온 전도성

이상걸,이갑열,조남주 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

순수 고체 전해질과 겔형 고분자 전해질의 장점을 취합한 새로운 형태의 블렌드계 고체 전해질을 제조할 목적으로, 현재 유기 가소제로 널리 쓰이는 ethylene carbonate(EC), propylene carbonate(PC) 대신 실온에서 휘발성이 낮은 저분자량의 polyethylene g1ycol(PEG) 및 polyethylene glycol dimethylether(PEGDME)를 사용하였다. 또한, 고분자 매트릭스로는 지지체 역할 뿐만 아니라 염과의 복합체를 형성할 수 있도록 soft segment에 PEO/PPO 공중합체를, hard segment urea기를 도입한 세그멘트 폴리우레탄 우레아(segmented polyurethane urea, SPUU)를 사용하였다. 제조된 SPUU팀에 휘발성이 낮은 저분자량의 PEC 및 PEGDME와 리튬염을 부가하여 solution casting법으로 블렌드계 고체 전해질을 제조한 다음 교류 임피던스법으로 이온 전도도를 측정하였다. 이때 이온 전도도는 PEO 및 PEGDME의 분자량 및 함량에 의존함을 관찰할 수 있었다. In order to prepare a new blend-type electrolyte possessing the merits of both an intrinsic polymer electrolyte and gel-electrolyte, we report on a class of nonvolatile (dry) polymer electrolyte, prepared by plasticizing a segmented polyurethaneurea (SPUU) with solution of lithium salt in oligomeric poly(ethylene glycol) (PEG) and poly(ethylene glycol) dimethyl ethers (PEGDME). SPUU having PEO/PPO copo1ymer in soft segment and urethanerurea group in hard segment was used in order to prepare a mechanically stable blend-type electrolyte for for improving the affinity between PEC or PEGDME and matrix. and the ionic conductivity was measured by AC impedance spectroscopy. As a result, it was observed that the ionic conductivity depended on the molecular weight and contents of PEC and PEGDME.

수맥탐사 시스템의 PDA 구현

이상열,황병곤 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.1 No.2

본 논문은 GPS와 지자기장을 이용하여 수맥을 좀더 효율적으로 탐사하기 위한 시스템구축이다. 본 논문에서 제시한 시스템은 휴대하기 간편한 PDA를 이용하여 탐색 영역의 수맥에 관한 정보를 자동적으로 데이터베이스로 저장시킬 수 있기 때문에 탐색에 소요되는 인력과 시간을 절약시킬 수 있다. 한편 개발된 시스템은 획득한 자료분석을 통해서 시추하여야할 위치를 정확히 분석할 수 있다. This paper presents system to enable an efficient water vein detection using GPS and geomagnetic fields. Because the presented system in this paper can be automatically saved the data acquired from GPS and geomagnetic instrument into the database, it can be decreased the number of detectors and saved the time for water vein detection. It can be analyzed the position for the drilling correctly.

우리 나라 소득세제와 소득세행정의 변천과정 연구

서희열,김상철 강남대학교 2002 論文集 Vol.39 No.-

4 行政機關의 吸入空氣量에 關한 硏究

李成烈,韓炳祜 嶺南大學校 工業技術硏究所 1974 연구보고 Vol.2 No.1

In a four-stroke engine, the entire picture of the inlet air flow would be given by measuring the discharge coefficient determined by the lift of inlet valve at each crank angle. In this paper, the discharge coefficient corresponding to the valve lift at each crank angle were measured, and the other factors related to it, the contraction coefficient and the velocity coefficient were made clear. In addition to this, the movement of instantaneous air flow at each crank angle was observed by means of low pressure indicator diagram on a test engine, 4 cycle, gasoline, one cylinder, water cooling, and over head valve type. As results, following items were confirmed; 1. The discharge coefficient had a tendency to decrease itself as the valve lift increased assumedly on account of the inter-relationship between the contraction coefficient and the velocity coefficient. 2. Calculated instantaneous air flow by measuring the discharge coefficient and low pressure indicator diagram with accuracy, and observed the fact that the maximum air flow occured at a point where the piston speed reached its peak. 3. Calculated instantaneous volumetric efficieny and realised that the efficiency had a tendency to increase its value abruptly on a segment crank angle, from 120 degree after TDC to the point just before BDC.

하천부지의 효율적 이용방안 : 검단공업단지

徐祥烈 영남이공대학 산업기술연구소 1995 産業技術硏究 Vol.8 No.-

This research is concerned with how seepage through the permeable foundation stratum results upon the safety of embankment constructed on riverbed-the Kumdan industrial complex. The data from the in-situ tests, laboratory tests, and computer program are presented and discussed on the effects of seepage of an alluvial formation. Uplift pressure values were re-presented in the form of pore pressure with the aid of computer program. Emphasis was placed on assessing the influence of seepage under the riverbed embankment. In particular it is shown that: (1) some of levees are constructed on foundation composed of various kinds of alluvial materials underlaid by some form of various kinds of alluvial materials underlaid by some form of bedrock and forms sandwich typed permeable foundation formation that have potential fissuration in case that depth of low permeable upper soil stratum is shallow. (2) this kind of levees as that of the Kumdan industrial complex need to have seepage control methods that are following proposals of reducing quantity, withstanding uplift pressure and lowering piezometric head; ① sheetpile cut-off wall ② compacted barrier of impervious soil ③ grouted or injected cut-off ④ impervious wall of mixed in-place piles.

지반의 동상특성에 관한 실험적 연구(Ⅱ)

서상열 영남이공대학 산업기술연구소 2000 産業技術硏究 Vol.12 No.-

Characteristics of frost heaving were observed for the soil filled with in the natural soil bath. From this study, the following conclusions were drawn. 1. The frozen thickness for soil was thought to be a constant. 2. The amount of ground frost heave increased in line with an increase of the temperature gradient. 3. In cold region, the effect of the tapered pile was low. 4. The amount of ground frost heave coincided with the amount of wate migration at the freezing front. 5. In the case of ice lens near the ground surface, the effect of a sublimation was small. 6. The pressure action on structure was a great difference with the shape of underground object.

항만공사의 연약지반개량에 관한 연구

徐祥烈 영남이공대학 1997 論文集 Vol.26 No.-

The "4th Development of Seaport on the Pusan" project involved the strengthening of soft soil in a 739,600㎡ site at the Gam-man dong of Pusan. For the design of improvement, conventional bore hole, laboratory tests and piezocones were carried out. This construction site lies over 0.0 to 22.0 m of alluvial and residual soft clay under the reclamated sand fill stratum. The coefficients of consolation obtained in the field measurement and piezocones were greater than the ones obtained in the laboratory tests. The reason for this result seems to be mixing of sand and clay at the top of clay-stratum caused by the reclamation of sand-fill.

전문계 고등학교 교사들의 이러닝 활용과 영향요인 간의 구조방정식 모형

박성열,남민우,박운구 한국농업교육학회 2008 농업교육과 인적자원개발 Vol.40 No.2

이 연구는 전문계 고등학교 교사들을 대상으로 이러닝을 활용하는데 영향을 미치는 요인들을 파악하고, 이들 요인들간의 인과관계성을 구조 모형적인 측면에서 분석 · 설명하는 데 중점을 두고 있다. 연구모형에 포함된 요인은 교직경력, 컴퓨터 사용경험, 이러닝 지원부문, 이러닝의 사회/조직 관련성 등의 외생변인과 이러닝 활용을 위한 컴퓨터 리터러시, 이러닝 활용 의향도 등의 내생변인 등이며, 요인들간의 상관계수를 산출하여 그 행렬을 이용, LISREL 프로그램에 의해 공변량 구조 이론 모델 분석을 수행하였다. 이 연구에서 제시된 모델 분석을 통한 연구결과는 다음과 같다. 첫째, 교사들의 이러닝 활용을 위한 컴퓨터 리터러시에는 설정된 외생변인 중 컴퓨터 사용경험의 영향을 가장 크게 받고 있으며, 다음으로 이러닝 지원정도, 사회/조직 관련성 등의 순으로 영향을 받고 있다. 둘째, 최종 내생변인인 교사들의 이러닝 활용 의향도에는 외생변인 중 이러닝의 사회/조직 관련성만이 영향을 미치는 것으로 분석되었다. 셋째, 내생변인간의 관계성을 분석한 결과 교사들의 이러닝의 활용 의향도는 이러닝 활용을 위한 컴퓨터 리터러시에 매우 큰 영향을 받고 있음을 보여 주었다. This study was designed and implemented to identify factors affecting e-learning use of vocational high school teachers based on structural equation model. The model career, computer experience, e-learning support, social and organizational norm related to e-learning as exogenous variables and computer literacy and intention to use as endogenous variables. The researcher produces a correlation matrix among the variables and run a structural model using LISREL program. The major findings after are as follows. First, teachers' computer experience was the most significant factors affecting their computer literacy to utilize e-learning, followed by e-learning support and soial and organizational norm. Second, intention to use e-learning, terminal exogenous variable was influenced by e-learning social and orginizational norm among exogenous variables. Third, in terms of the relationships between endogenous variables, intention to use e-learning was largely influenced by computer literacy from the model analysis.