새 物理 敎育課程 實驗의 效率的 運營方案

權寧駿,柳志旭 공주대학교 사범대학 과학교육연구소 1984 과학교육연구 Vol.16 No.1

Experiment is very important in physics education. We analyzed the ex-perimental procedures in new physics curriculum of high school and propose the followings for its effective management. 1. It is better that the physics experiment wouid be divided into essential, optional and extra-curricular experiment according to ability of students and conditions of laboratory facilities. 2. It is better to consider the proper time of experimental activity. 3. Laboratory works should be performed in various ways. 4. The basic facilities and the experimental apparatuses should be prepared and new apparatuses developed. 5. Rational management of manpower is essential for effective implementation of experiments.

다공질규소 다층 박막의 광학적 특성에 대한 컴퓨터 시늉내기

권인숙,김문원,홍사용,김영유,류지욱,이춘우 公州大學校 基礎科學硏究所 1999 自然科學硏究 Vol.8 No.-

다층 박막의 광학적 특성을 컴퓨터 시늉내기로 조사하기 위해 다층박막의 특성 매트릭스 (transfer matrix)를 세우고 이 것을 사용하여 전체 반사율을 계산하였다. 컴유터 시늉내기는 페브리-페로(FP)형 다중박막과 브래그(DBR)형 다중 박막에 대해 수행되었다. 각 경우에 대해 다양한 두께와 박막의 주기 수를 변화시키며 반사 스펙트럼을 조사하였다. 마지막으로 실제 결과와 비교하기 위해 다공질규소의 발광 스펙트럼을 가우스 함수로 근사하여 FP필터와의 전체 광학적 특성 결과를 얻었다. 그 결과 FP형 필터는 원하는 스펙트럼의 영역과 폭을 선택 할 수 있었다. 또한 FP형 필터의 성능은 반복되는 층의 수가 8개 이상이 되면 별로 향상되지 않았다. 따라서 실험적으로 적절한 층수는 8개 정도가 적절할 것이다. To simulate optical characteristics of multi-layers, we set up transfer matrices and constructed a total transfer matrix and calculated reflectivity of a system. The simulation was conducted on Fabry-Perot(FP) and Bragg reflector(DBR). For each case, numbers of layers and its thickness were varied to observe changes in its reflectivity. Finally, to compare our results with real data, we constructed a ps luminescence spectrum with two Gaussian functions and calculated output with various FP layers, in which indices of retraction were 1.27 and 2.24. We found FP type filter could select desired range and width of spectra. The ability of FP filters improves very little when a number of period in multi-layer was greater than 8. Therefore we suggest that 8 period FP filter is proper for experimental purpose.

現行 中等學校 科學敎育의 實態와 改善方案 : On the Basis of the Analysis of the Questionaire to Secondary Science Teachers 科學敎師를 對象으로 한 設問調査分析을 中心으로

柳志旭,權寧駿 공주대학교 사범대학 과학교육연구소 1985 과학교육연구 Vol.17 No.1

This study is to analyze the status of current science education, and to find its improvement measure. For the analysis of current science cducation, the questionare to present science teachers, interview with science teacher and statistical data relative to education were used. The categories for the analysis were the curriculum and its management, facilities for experiments, teachers, and students. The improvement measure for the inquiring science learning are as follows: 1. The contents of learning should be systematically connected with the objec-tives of subject, and the methods of evaluation should be managed in order to measure the student's level of achievement in the light of objectives of subject. 2. Since the possession ratio of laboratories and experimental facilities is very low, a epoch-making remedy is required. Also, the management system should be improved in order to raise the level of its practical use, and the law of standard facilities should be reformed according to the new curriculum. 3. The opportunities of science teacher's training should be enlarged, and the class hours and mental burden should be lessened. 4. The teaching methods should be improved so that the student may play an active role in his class, and the number of students per one class should be diminished for the inquiring learning.

정신분열병의 선택적 주의력 저하의 보상 기전

최지욱,정범석,김지웅,김성윤,권준수,전덕인,김창윤 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.6

Objectives : This study investigated the compensatory neural correlate of selective attention deficit in schizophrenics Show-ing near-normal performance. Methods : A 'modified Stroop' was developed that can be used measure the response time during functional imaging. An event-related functional magnetic resonance imaging study was carried out in 10 clinically stabilized schizophrenics and 10 healthy controls during the performance of a 'modified Stroop'. In the 'modified Stroop', the subjects were required to respond with a two-button mouse to whether or not the color of a subsequent word corresponded to one of T-shirt. The significantly activated brain regions were investigated in a voxel-wise Mest of the Stroop load. Results : Schizophrenics, compared with healthy controls, showed poorer response time, but had similar accuracy. Compen-satory activation in the right inferior frontal gyms (IFG) was observed in schizophrenics. The left paracingulate sulcus was less activated in the schizophrenics than in the healthy controls. Conclusion : These results suggest that, in schizophrenics showing a normal accuracy during the Stroop, selective attention deficits might be related to the left paracingulate sulcus as well as the anterior cingulate. In addition, their deficits may be compensated with the right IFG.

젊은 성인에서 흡연에 의한 상완동맥 내피기능의 부전에 관한 연구

이상철,권영주,방덕원,이선해,이보영,김지욱,김영훈,온영근,현민수,김성구 순천향의학연구소 2002 Journal of Soonchunhyang Medical Science Vol.8 No.1

Background and Objectives : Cigarette smoking is a major factor and the most modifiable risk factor for atherosclerosis. Endothelial dysfunction is an early event in atherosclerosis, before the structural change of the systemic arteries. We hypothesized that endothelial dysfunction might be present in the systemic arteries of young adult smokers and that this might be dose-dependent phenomenon. Therefore, we try to certify that smoking is associated with endothelial dysfunction in healthy young adults without other risk factor of atherosclerosis. Subjects and Methods : we studied noninvasively 29 subjects aged 3 to 4 decades without other risk factor of atherosclerosis, they were composed of the two groups, current smokers(n=15) and nonsmokers(n=14). Smoking history varied from 3 to 20 pack years. Using high-resolution ultrasound, vessel diameter and mean flow rate were measured at rest, during reactive hyperemia(with flow-mediated endothelium-dependent dilation), and after sublingual nitroglycerin(NG-induced endothelium-independent vasodilation). Result : Flow mediated endothelium dependent dilation was observed in the control subjects (9.4±3.44%) but was impaired in the smokers(5.8±2.51%)(p=0.004). NG-induced endothelium independent dilation is no difference in all subjects. Conclusion : Cigarette smoking is associated with endothelial dysfunction in healthy young adults.

베체트병 환자에서 Azathioprine으로 유발된 급성 췌장염 1례

김기향,권민정,김동기,김애란,김윤정,박지훈,이영태,박보민,김동욱 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Although many drug are thought capable of initiating acute pancreatitis, following azathioprine administration represents the 5% incidence by far the highest recorded incidence to date. We report a 35-year-old male who developed acute pancreatitis in the course of treatment with azathioprine for Behcet's disease. He was admitted due to abdominal pain, diarrhea, and fever for 10 days. Serum amylase and lipase levels were 510U/L and 3702U/L respectively. The abdominal CT scan revealed diffuse enlargement of the pancreas. There was no history of alcohol use or gall bladder disease. We considered drugs, especially azathioprine, as the cause of acute pancreatitis. We diagnosed it as acute pancreatitis. The patient was treated conservatively with hydration and analgesics. The symptom subsided within four days. Five days later, azathioprine was resumed. And the patient complained of abdominal pain. The elevated levels of serum amylase and lipase confirmed the recurrence of pancreatitis. His symptom subsided when azathioprine intake the stopped, and the serum amylase and lipase levels returned to normal level within five days.

직업성 요통 환자에서 항 제 I 형 교원질 항체역가의 의의

이종민,권용욱,김수근,임현술,김지용,정준호 大韓再活醫學會 2000 Annals of Rehabilitation Medicine Vol.24 No.1

Cryptococcal 뇌막염이 병발된 수막 암종증 1예

안병철,고지영,이현옥,최진영,권오상,박용욱 중앙대부설한국의과학연구소 1990 한국의과학 Vol.22 No.1

1980년대(1981-1990) 전·후반기 피부과 외래환자의 통계적 비교 관찰

은 철,강승구,권상진,정성재,조지형,권철욱,김영진,김재홍 한양대학교 의과대학 1997 한양의대 학술지 Vol.17 No.1

To study the prevalence of common dermatoses 37,638 and 30,286 new outpatients who visited dermatology clinic with Hanyang University Hospital from January 1981 to December 1985 and from January 1986 to December 1990, respectively. Among the 37,638 outpatients in the first 5 years, the total number of male patients were 18,107(48.1%) and female patients were 19,531 (51.9%). Among the 30286 outpatients in the last 5 years, the total number of male patients were 14,705 (48.6%) and female patients were 15,581 (51.4%). In the both periods, the most frequent age groups was 21-30 (27.3%,25.2% respectively). The 15 common dermatoses, bacterial infection, seborreic dermatitis, drug eruption, verruca, syphilis, psoriasis, herpes zoster, and hypopigmentary disorder, in order of frequency. In thelast 5years, dermatophytosis, contact dermatitis, urticaria, acne, other eczema, atopic dermatitis, seborrheic dermatitis, bacterial infection, drug eruption, verruca, gerpes zoster, psoriasis, hypopigmentary disorder, scabies and syphilis were the 15 common dermatoses, as frequency. In both periods, the dermatosis which showed annually increasing tendency was dermatophytosis and those of decreasing tendency was bacterial infection. In the both periods, dermatophytosis, urticaria, bacterial infection, seborrheic dermatitis, verruca, and hypopigmentary disorder occurred most frequently during the summer season, and the incidence of other ecxema, scabies, atopic dermatitis, and herpes zoster increased during the winter season.

정신분열병환자의 뇌량에 대한 신경병리적 고찰 : 확산텐서영상(Diffusion Tensor Image)기법의 적용

이경진,신용욱,하태현,이종민,김인영,김선일,문원진,정은철,박해정,오정은,박지영,강경훈,권기원,권준수 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.4

Objectives : Diffusion tensor imaging (DTI) is a new technique that can be used to visualize and measure the diffusion of water in brain tissue. It is particularly useful for evaluating white matter abnormalities. In this paper, we investigated the neuropathology of the corpus callosum in patients with schizophrenia through the new methods, diffusion tensor imaging. Methods : Diffuse tensor imaging was performed in 19 schizophrenic patients and 26 healthy controls. One complementary measure, fractional anisotropy (FA), which is considered to be sensitive indices of axonal integrity, was obtained from regions of interest in the five areas of the corpus callosum. Neuropsychological measurement also underwent for measurement of frontal lobe function in two groups. Results : There were no significant differences of FA in the DTI measures for either the schizophrenic patients compared with controls. FA was significantly decreased in women compared with men. Neuropsychological measurements such as Wisconsin card sorting test were correlated with FA of patients with schizophrenia. Conclusion : FA measures revealed no differences between schizophrenia and controls. The findings suggest that the structural integrity of white matter in patient with schizophrenia was not disrupted. The results are discussed in relation to previous studies reporting positive and negative findings. It is concluded that further studies using DTI in larger samples, improved and standardized methods of data acquisition and analysis are needed.