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이#한,송정섭 대한전자공학회 1980 전자공학회지 Vol.17 No.6
SRO2-Si 이종접합 태양전지소자틀 진공증착에 의하여 제작하여 SRO2를 Si기판위에 증착후 실기중에서의 열처리(소둔)가 태양전지소자의 특성 특히 단락전류와 개방단자전압에 미치는 영향을 실험적으로 검토하여 이 열처리온도에 최적치가 있음을 알았다. 이 최적온도는 Si기액의 고유저항에 따라 차이가 있으며 고유저항이 비슷한 경우는 N형과 P형 Si 기판에 따르는 큰 차이는 없으나 같은 P형 Si기판인 경우에는 고유저항이 낮은 쪽의 최적온도가 높은 것으로 나타났다. The Sn O2-Si Heterojunction sola cells are Prepared by vacuum deposition of SnO2 on N- and P-type Si - wafers arts the effects of annealing on the Solar cell characteiistics are presented. The existence of optimumannealins temperature for maximum open-circuit voltage and short - circuit current of the solar cell is observed. The optimum tomperature, when low resistivity (7- 2.3 [$\Omega$.cm]) P-and N-type Si -wafers are used, is 500 [$^{\circ}C$] End 400 [$^{\circ}C$] when high resistivity[41-58 [$\Omega$.cm]) P-type Si-wafers are used.
성 봉재,한 승호,김 선익,김 관후,이 가순,김 현호,원 준연,서 정덕,조 진웅 한국작물학회 2014 Korean journal of crop science Vol.59 No.3
This study investigated ginseng growth and ginsenoside contents after control a reserved ginseng cultivation land using various green manure crops for stable ginseng cultivation. Followings are results obtained from this research. After cultivate the green manure crops, microbial flora in soil was diversified, organic matter and total-N content increased, but salt content decreased. The highest output obtained from the wheat cultivated area among various green manure corps. Growth of shoot and root of two years old ginseng increased significantly at the green manure crop cultivated area. Specially, the wheat cultivated area was the most effective in growth. Also, the rate of the leaf discoloration at the aerial part and the rusty root at the root was the least at the wheat cultivation area. Meanwhile, the ginsenoside content was the most at the wheat cultivation area. Thus, the reserved ginseng cultivation land could be managed by cultivating wheat for effective ginseng growth.
조한표,이숙진,신대희,최성일,한 호,이 상,김순길,김경수,임헌길,김정현,이방헌,이정균 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.2
Left ventricular pseudoaneurysm is defined as a rupture of the myocardium that is contained by pericardial adhesion or the epicardial wall. The etiology of pseudoaneurysm are mainly transmural myocardial infarction, various type of cardiac surgery, blunt or penetrating chest trauma, infection (endocarditis, myocarditis, tuberculosis, syphilis). Although LV pseudoaneurysm is clinically uncommon, diagnosis is difficult and rupture often leads to death. Therefore, a surgical repair is necessary in most cases of left ventricular pseudoaneurysm. It is important to have a high clinical index of suspicion, because the symptoms, signs, electrocardiographic abnormalities and radiographic findings seen in LV psuedoaneurysm can be indistinguishable from those in patients with coronary disease alone. We report a case of 64-year-old male with coronary artery disease of 3 vessel and symptomatic left ventricular pseudoaneurysm after myocardial infarction.
Effects of V/III flux ratio on Curie temperature of GaMnAs
동완 고,용주 박,관수 정,광무 김,영미 김,일기 한,일우 박,정일 이,진범 박 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.2
We investigated the eects of V/III ux ratios on the Curie temperature, TC, in Ga1xMnxAs layers with Mn mole fractions of x = 0.03 and 0.05. Changes in the TC are observed by varying V/III ratio with a xed Mn mole fraction. The TC in the sample grown with a lower V/III ratio (25) is found to be higher than that in the sample grown with a higher V/III ux ratio (34) at a xed high Mn concentration (x = 0.05). Although the Mn concentration is increased, the TC is not much changed when the V/III ratio is high (34). These results can be explained by the existence of low-temperature growth defects, which are considered to have the main eects on the electrical and the magnetic properties of the GaMnAs layers. We elucidated the relevant defects by employing thermal annealing processes and by obtaining photoluminescence spectra.
김용일(Yong Il Kim),이영돈(Young Don Lee),오재환(Je-Hwan Oh),최인석(In Suck Choi),차 한(Hann Chah),이의돈(Eui Don Lee),함봉진(Bong Jin Han),이 근(Keun Lee),이병국(Byung Kook Lee),임윤명(Yoon-Myung Im),박귀화(Gwi Hwa Park) 한국의학교육학회 2003 Korean journal of medical education Vol.15 No.2
Purpose: The aims of this paper are to develop a student evaluation format as a part of core clinical clerkship (student internship) program at Gachon Medical School, and to identify its impeding factors in implementation. Methods: Both rating scale of Likert type and check list for student s clerkship assessment were designed; the rating scale format was developed into two parts, namely attendance and the clinical competence demonstrated during the clerkship in which 3 domains of knowledge, skills and attitude were included in balance; the professional competence was made of 9 items, each being designed to accommodate 3 degrees by learner s performance. The clinical instructors in charge were requested to sit a short feedback session on the evaluation results with students who were signed at the end. Nursing staff was also asked to participate in evaluation of the student attitude in a limited area. Results: Despite the full acceptance of the evaluation approach theoretically, its practical implementation was not successful because of difficulties related to adjustment of their department-based scoring system to the comprehensive assessment, or unfamiliarity with face-to-face feedback system. Conclusion: The authors assume that this Likert type of the rating scale is a simple, more comprehensive and strong tool to meet the learning objectives, and easy to enhance the feedback effect. It is, however, advised that the formative reporting system is crucial to transform the traditional evaluation approach into the pass/fail format so that unnecessary conversion risk is eliminated.
퇴행성 및 협부형 척추전방전위증 환자의 시상면상 형태의 임상례 보고
이진혁(Jin Hyuk Lee),강만호(Man Ho Kang),설무창(Moo Chang sul),조계창(Kye Chang Cho),진은석(Eun Seok Jin),이 한(Han Lee) 척추신경추나의학회 2008 척추신경추나의학회지 Vol.3 No.1
Objective : Spondylothesis is a disease which sagittal facet of vertebral body s invariable alignment is being broken and vertebral body being pushed forward. Main pattern of spondylothesis is isthmic spondylothesis by isthmus defect or fracture, degenerative spondylothesis occurred by desiccated change of intervertebral disc or vertebral condyle joint s ligament. The purpose of this study is to assess the difference of the Pelvic angles, Lumbosacral angles, Pelvic tilt, and Lumbar lordotic angles of the spondylothesis patients. Methods : We analyzed the lateral view of lumbar spine of 49 isthmic spondylothesis patients, 45 degenerative spondylothesis patients and 26 patients who haven t been diagnosed as vertebra disease. We investigated each patient’s pelvic angle, lumbosacral angle, pelvic tilt and lumbar lordotic angle. Results and Conclusion : 1. Pelvic incidence, in cases of degenerate spondylothesis patients, is higher than spondylothesis patients but shows less significance. On the contrary significance is higher than the group haven t been diagnosed as vertebra disease. 2. Lumbosacral incidence, in cases of isthmic spondylothesis patients, shows higher significance than degenerative spondylothesis patients and the group haven t been diagnosed as vertebra disease. 3 Pelvic tilt, in cases of degenerative spondylothesis patients, shows higher significance than isthmic spondylothesis patients and the group haven t been diagnosed as vertebra disease. 4. Lumbar lordotic angle, in cases of isthmic spondylothesis patients, shows higher significance than degenerative spondylothesis patients and the group haven t been diagnosed as vertebra disease. 5. Degenerative spondylothesis patient shows specific impression, a forwardly moved high femoral axial and as a result of large lumbrosacral angle and lumbar lordotic angle shows specific impression, an increased weight pressure on sacrum.