Young의 간섭실험에서 이중슬릿 앞에 놓인 단일슬릿의 기능에 대한 연구

정성오,김학수 釜山大學校 師範大學 科學敎育硏究所 2009 科學敎育硏究報 Vol.36 No.-

A double-slit experiment was done by using two kinds of single-slits. The light sources were a halogen lamp, Na-lamp and sun light. The interference fringes were observed by photographing the fringes on the screen and exposing a film on the screen position without lens of the camera. The visibility was better when the width of the single-slit was narrower. The distance between the single-slit and the double-slit was varied. As they were closer, the visibility was decreased. In the experiment using a prism, we could observe the interference patterns of all wavelengths in one picture. From this experiment we can suggest that this experiment might be used in the introductory physics laboratory for understanding interference and diffraction of light.

無等山 標高에 따른 季節別 昆蟲相에 關한 硏究(Ⅰ) : -春季分布相-

丁聖淑,金美蓮,金奎眞,吳貞子 全南大學校 農漁村開發硏究所 1992 農業科學技術硏究 Vol.27 No.-

無等山 標高에 따른 季節別 昆蟲相을 調査하기 위해 1991-1992年 2個年에 걸쳐 調査한 結果를 要約하면 다음과 같다. 1. 無等山의 봄에 分布하는 昆蟲種類는 總 10目 39科 120種이 調査되었다. 2. 標高別 調査에서는 100-500M에서 10目 37科 110種이, 500-900m에서는 9目 35科 101種이, 900-1200m에서는 5目 12科 18種이 調査되었다. 3. 표고에 따른 출현빈도가 높고 발생량이 많은 種은 100-500m 에서는 흰나비科의 줄흰나비(Artogeia napi), 배추흰나비 (Artogeia rapae), 배추흰나비 (Artogeia rapae), 네발나비科의 청띠신선나비 (kanisha canace), 애기세줄나비 (Neptis dsppho), 풍뎅이科의 검정풍뎅이 (Holotrichia kiotensis), 꿀벌科의 꿀벌(Apis melica), 뒤영벌科의 어리호박벌(Xylocopa appendiculata)로 밝혀졌고, 500-900m 사이에서는 네발나비科의 애기세줄나비(Neptis dssppho), 허리노린재科의 큰허리노린재(Molipteryz fulignosa), 집게벌레科의 노란다리민집게벌리(Euborellia pallopes), 꿀벌科의 꿀벌(Apis melifica)이었고 900-1200m에서는 부전나비科의 부전나비(Pelbejus angus), 꿀벌科의 꿀벌 Apis melifica), 길앞잡이科의 아이누길앞잡이(Cicindela gemmata)等이었다. 4. 무등산 정상인 1,000-1,200m 지대에서 봄에만 볼수있는 종으로서 호랑나비科의 이른봄애호랑나비(Luehdorfia puzilor), 흰나비과의 갈고리나비(Anthocharis scolymus) 2種이 관찰되었다. This study was carried out to investigate the insects fauna of Mt. Mudeung in spring season from 1991 to 1992. The results obtain summaries as follows. 1. The total of 120 species belongs to 39 families of 10 orders were investigated. 2. In different sea levels,10 orders 37 families 110 species at 100-500m. 9 orders 35 families 101 species at 500-900m and 5 orders 12 families 18 species at 900-1200m in sea level investigated respectively. 3. High grequency and population density of Insects by sea level were investigated : Artogeia rapae, Kanisha canace, Neotis dspho, Holotrichia kiotensis, Apis melifica and Xylocopa appendiculata in 100-500m. Plebejus angus, Apis melifica and Cicinedela gemmata in 900-1200m above sea level. 4. Both species of Luehdorfia puzilor and Anthocharis solymus were observed at 1000-1200m of Mt.Mudeung as species appeared only spring season.

Ring-on-ring 강도시험법을 이용한 200mm 반도체 실리콘 웨이퍼의 파괴강도 분석

정성민,박성은,오한석,이홍림 연세대학교 산업기술연구소 2000 논문집 Vol.32 No.2

Biaxial fracture strength of the commercial 200mm Czochralski single crystal silicon wafer was measured by the ring-on-ring technique and was compared with theoretical strength of Si single crystal. The ring-on-ring apparatus was newly designed and manufactured after analyzing stress distribution in ring-on-ring test with FEM(Finite Element Method) computerized simulation. Weibull modulus of the silicon wafer was also calculated from the measured fracture strength.

TiO₂분말의 현탁액에서 광에 의한 수소와 과산화수소의 생성에 관한 연구

오형식,성정섭 木浦大學校基礎科學硏究所 1985 基礎科學硏究誌 Vol.3 No.-

TiO₂/water suspension에 UV광을 조사하여 생성되는 H₂와 H₂O₂를 연구했다. H₂와 H₂O₂의 생성속도는 GC와 요오드 적정법으로 측정했다. 여기서는 반도체의 양을 세가지로 나누어 실험한 결과 H₂의 극한속도는 조사시간이 약 2시간일때 였고 H₂O₂의 극한농도는 3시간 이후 일때 였으며 시간이 증가 할 수록 점차로 O 에 접근함을 알 수 있었다. H₂와 H₂O₂의 생성에 대한 양자효율은 각각??과 ??이었다. Photosynthetic generation of H₂and H₂O₂is demonstrated on UV-irradiated TiO₂/water suspensions. The rate of H₂and H₂O₂generation were monitored by a combined analytical-gas chromatographic procedure as a function of irradiation time and solid content. The rate of H₂evolution of TiO₂for three levels of solid content in the reaction mixture. A limiting rate of H₂generation is attained after∼2h of illuminations. This limiting rate is directly proportional to the concentration of TiO₂. A limiting concentration of H₂O₂is attained after ∼3th of illumination, and concomitantly the rate drops gradually to zero. The apparent quantum yields for generation of H₂and H₂O₂on TiO₂were calculated to be ?? and ??, respectively.

단결정 n-TiO₂광전극에 대한 Flatband Potentials와 Mott-Schottky 그림

오형식,성정섭 木浦大學校基礎科學硏究所 1986 基礎科學硏究誌 Vol.4 No.-

단 결정 TiO₂양극에 대한 표면제조 처리는 이상적인 Mott-Schottky 그림이 보인 바와 같이 매우 작은 주기분산을 나타냈다. Rutile boules의 세 형태(Prism, Al-free, optical grade)에서의 실험은 flatband potential에서 현저한 차이를 나타냈다. Prism grade, optical grade와 Al-free에서의 pH에 대한 flatband potential의 의존성은 각각 65, 62, 58mV/pH Unit였다. 즉, prism grade와 Al-free에서의 flatband potential의 차는 pH=1.0 에서 50mV, pH=12.1에서 160mV였다. 마지막으로 특별히 처리된 TiO₂시료는 전해질의 농도가 1.1M일때 이상 적인 Mott-Schottky 그림이 나타났으며 전해질의 농도가 0.25M보다 작으면 큰 주기 분산효과를 나타냈다. We have found a surface preparation treatment for single crystal TiO₂ photoanodes that produces ideal Mott-Schottky plots showing very little frequency dispersion. The special preparation procedure permitted precise determination of flatband potentials, and experiments with three types (prism grade, optical grade, and Al-free) of rutile boules showed significant difference in their flatband potentials. The average pH dependence of flatband potential for prism, optical grade and Al-free boules were 65, 62, 58mV/pH unit, respectively. For the prism grade and Al-free boules this represented flatband potential differences of 50mV at ph=1.0 and 160mV at ph=12.1. Finally, we observed that the specially treated TiO₂samples would only yield ideal Mott-Schottky plots if the concentration of the electroyte was about 1M. The use of electrolyte concentrations less than 0.25M produced large frequency dispersion effects.

기관골 신생증 1예

오영상,이은우,정종혁,문승원,김수현,김동한,양혁승,박정환,박경옥,강성수,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Tracheobronchopathia osteoplastica is a rare disorder of unknown cause characterized by the projection of numerous bony or cartilaginous submucosal nodules into the tracheobronchial lumen with sparing of the posterior membranous portion of tracheobronchial tree. In the past, most of the cases were diagnosed as secondary finding at autopsy. Nowaday, the key component of the evaluation is flexible fiberoptic laryngoscopy and bronchoscopy, which typically demonstrates irregular spicules of subrnucosal bone and cartilage projecting into the tracheobronchial lumen and causing various degrees of airway obstruction. A 45 years old man was visited Sunchon St. Carollo hospital due to discomfort on throat. We saw several nodules just below vocal cord via laryngoscope. The computed tomography revealed multiple small calcified nqdules on trachea and both main bronchi. Pathologic finding of bronchoscopic biopsy showed abnormal proliferation of bony and cartilagious nodules in the tracheal submucosa. These fingdings were consistent with tracheobronchopathia osteoplastica. We report here on a case of tracheobronchopathia osteoplastica with review of literature.

한국어 판 구조화 임상면담도구 개발 : 신뢰도 연구

한오수,안준호,송선희,조맹제,김장규,배재남,조성진,정범수,서동우,함봉진,이동우,박종익,홍진표 대한신경정신의학회 2000 신경정신의학 Vol.39 No.2

연구목적: 정신장애의 정확한 진단과 평가는 임상에서뿐만 아니라 신뢰성 있는 연구를 위해서도 매우 중요하다. Structured Clinical Interview for DSM-IV(SCID)는 임상전문가들이 사용하는 진단도구로서, 비교적 짧은 시간에 정확한 진단을 내릴 수 있다. 본 연구는 한국어판SCID를 개발하고 그 신뢰도를 평가하기 위해 수행되었다. 방법: 국문학자가 포함된 번역위원회를 통하여 연구용판 SCID를 번역한 후, 정신과 의사 2인과 임상심리학자 1인에게 한국어판SCID 실시방법을 교육시킨 뒤 한국어판SCID를 이용한 면담의 평가자간 신뢰도 (interrater reliability)를 검증하였다. 면담 대상은 1999년 2월에서 3월까지 2개 병원 정신과에 치료중인 환자 90명(남:41명, 여:29명)이었다. 결과: 현재 장애(current disorder) 평가에서 주요 우울장애, 기분부전장애, 정신분열병, 알코올 남용 및 의존, 기타 물질 남용 또는 의존, 여러 불안장애들 및 섭식장애 등과 같은 대부분 장애의 kappa값은 .70이상으로 매우 높았다. 그 이외의 양극성 장애, 망상장애, 광장공포증, 감별 불능 신체화 장애 및 건강염려증의 kappa값도 .69에서 .40사이로 수용할 수 있는 정도였다. 평생 장애(lifetime disorder)에서는 양극성 장애(k=.69)와 감별 불능 신체화장애(k=.59)를 제외한 다른 모든 장애의 kappa값이 .70이상이었다. K-SCID 면담시 Ⅰ축 질환에 대하여 흔하게 다중 진단이 내려졌으며, 평균 진단 수는 1.5∼1.7개로 나타났다. 결론: 한국어판 SCID는 신뢰도가 높은 진단도구로 생각되며, 향후 정신질환의 정확한 진단과 임상연구에 유용하게 사용될 수 있다. Objectives: Accurate diagnosis and assessment for psychiatric disorders is crucial for research, as well as for clinical practice. Structured Clinical Interview for DSM-Ⅳ(SCID-RV) is a less time-consumimg and more accurate structured diagnostic interview form. It can be used by clinical professions and is known for a reliable diagnostic tool. Present study was conducted to develop Korean version of SCID-RV and to test the inter-rater reliability. Methods: The authors have translated original SCID-RV into Korean, and revised in parallel with sociocultural background of Korea. Ninety patients from two psychiatric hospitals, both outpatient and inpatient, were interviewed and rated independently by three raters. Results: The kappa coefficients for most of illnesses, such as major depressive disorder, dysthymia, schizophrenia, alcohol abuse and dependency, anxiety disorder and eating disorder were excellent(>0.70) in the evaluation of current disorders. And the kappa coefficients for bipolar disorder, delusional disorder, agoraphobia, undifferentiated somatoform disorder, and hypochondriasis were acceptable(>0.40) in the evaluation of current disorders. In the evalua-tion of lifetime disorders, the concordant rates of all the diagnoses except bipolar disorder and undifferentiated somatoform disorder were excellent. Lack of hierarchy in DSM-Ⅳ allows for multiple Axis I diagnoses. Mean numbers of Axis I diagnoses per subject assigned by the three raters were 1.5-1.7. Conclusions: Our findings confirm that SCID-RV yields highly reliable diagnoses. SCID-RV is recommended for accurate diagnosis in clinical practice and research on psychiatric disorders.

유한요소 해석을 이용한 현장 콘크리트 부착강도 측정조건

김성환,정원경,권 혁,김현오,이봉학 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A

The performance of old and the new concrete construction depends upon bond strength between old and the new concrete. Current adhesive and strength measurement method ignores the effect of stress concentration from shape of specimens. Therefore, this research calculates stress concentration coefficient as the ratio of drilling depth to drilling diameter(h_s/D), the ratio of overlay thickness to drilling diameter(h_o/D), the ratio of steel disk thickness to drilling diameter(t/D), the ratio of overlay elastic modulus to substrate modulus(E_l/E_0), the distance from core to corner border(L_corner) and the distance between cores(L_core) vary. The finite element method is adapted to analysis. The results from the F.E.M analysis are as follows : The stress concentration effects can be minimized when the ratio of drilling depth to drilling diameter(h_s/D) is 0.20∼0.25, the elastic modulus ratio(E_l/E_0) is 0.6~1.0, and the ratio of steel disk thickness to drilling diameter(t/D) is 3.0. The overlay thickness, the distance from specimens to corner border(L_corner), the distance between cores(L_core) almost do not affect to the stress concentration.

볼나사 지지 구조와 베어링 조합 배열에 관한 연구

홍성오,정성택,조규재 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3

In order to achieve high precision machine tools, Performance enhancement of feed drive systems is required. One of the important technical issues is how to decrease thermal expansion of ball screw in proportion to the increase of machining speed. When measuring force of stretch of ball screw, since not only actual expansion and the value of bending have to be considered, it is impossible to define the exact value of expansion. In addition, support bearings of ball screw gain considerable force in axial direction. It also generates thermal expansion on the ball screw, and deteriorates the performances of the bearings. In conclusion, it is impossible to give the pretension enough to absorb all the elongation due to thermal expansion generated during machine is running. If give, bed column and saddle are all bent to change machine accuracy, and the support bearings of ball screw is damages.

보존적 치료로 회복된 망경색에 의한 급성복증 1예

김정념,이숭환,김정식,김진호,배윤오,박성규,윤상정,한현영,이헌영 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

Omental infarction, the end result of impaired perfusion to the greater omentum, is a rare benign self-limiting clinical entity. The main clinical symptom is non-specific localized abdominal pain with a moderately raised white blood cell and erythrocyte sedimentation rate. These findings often mimic an abdominal surgical emergency. This condition is often misdiagnosed as acute appendicitis or cholecystitis. The characteristic feature of CT scan and ultrasonography provide non-invasive diagnosis in most patients with omental infarction. We report a case of patient whose CT scan showed the characteristic finding of omental infarction. The patient was improved spontaneously only with conservative care.