PECVD에 의해 제조된 Sb-doped SnO₂박막의 광학적성질

김근수,윤석영,김광호 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.58 No.-

플라즈마를 이용한 화학증착법 (PECVD)으로 Corning glass 1737 기판에 Sb-doped SnO2 박막을 증착하였다. 플라즈마 화학증착시 반응변수에 따른 박막의 결정상, 표면형상 및 광투과도를 XRD, SEM, AFM 과 그리고 UV-VIS-NIR Spectrophotometer를 이용하여 분석하였다. Thermal CVD에 비해 PECVD법은 박막의 증착속도를 향상시켰고, 박막의 표면형상을 보다 균일하게 하였다. 반응온도 450℃, 유입가스비 R=1.12, RF power 30W에서 결정성과 광투과도가 비교적 뛰어난 Sb-doped tin oxide films을 얻을 수 있었다. Sb-doped tin oxide films were deposited on Coming glass 1737 substrate by plasma enhanced chemical vapor deposition (PECVD) technique. The films deposited at different reaction parameters were investigated by using XRD, SEM, AFM, and UV-VIS-NIR Spectrophotometer. Compared to thermal CVD,PECVD effectively enhanced the deposition rate and smoothed the surface of tin oxide films. Sb-doped tin oxide films which have a relatively good crystallinity and photo-transmission were obtained at deposition temperature 450℃, input gas ratio R=1.12, and RF power 30W.

고등학교 체육수업에서의 수행평가 적용상 문제점 분석

김이수,김평석,류수림,노덕선 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

This study aims to understand and analyze problems on applying performance assessment to physical education in high school, and to offer basic data to seek for measures to settle performance assessment in physical education. The specific themes are, first, we analyze the present condition of reflection of the assessment in physical training. knowledge. and attitude in physical education. Second. we analyze teachers' implementation of performance assessment. Third, we compare the recognition of performance assessment according to students' gender. Fourth, we compare the recognition of performance assessment according to the type of schools. For the research, twelve high schools in the Metropolitan area were randomly selected, and 50 physical education teachers and 305 high school students in third grade were polled. Collected data from teachers were classified by type after frequency study. and the data from the students were analyzed in terms of frequency. by the means of Independent T-test for verification of average deviation between male and female students and by means of one-way ANOVA for analysis of school type-related results. When there was any significant difference among groups, Tukey method was applied for the aftermath verification. The results are as follows. First, the reflection rate of assessment on physical training. knowledge and attitude in physical education was found to be 60: 30: 10. Second, teachers implement physical training assessment mostly in two sports per semester. Most teachers assess focusing on the record (the number of times), and implement the assessment twice per each sport. Classroom assessment and assignment assessment are implemented if required. As for exam questions for knowledge assessment. most teachers gave only multiple-choice type questions. Most teachers also implement knowledge assessment with various other measures such as experiment. drill, physical training test and report. Assessment of attitude is mostly implemented by teachers. They evaluate such factors as uniform, participation, attendance, absence, and lateness. Students' behavior and attitude during classes are also mostly reflected in assessment. 68.8% (thirty three) respondents answered that they evaluated students' attitude every class. Third. as for the awareness of performance assessment according to students' gender, both boys and girls are found to be well aware of the assessment. They showed positive responses toward the number of assessment, fairness and accuracy of self assessment and peer assessment; toward humanistic education and academic achievement which are results of performance assessment, boys showed positive responses whereas girls showed negative ones. Fourth, the comparison of awareness of performance assessment according to school type shows that respondents from all types of boys', girls' and co-ed high schools responded positively, and especially respondents from boys' high school answered more positively. As for the reflection of students' interest on the assessment, respondents from all types of boys', girls', and co-ed high schools responded negatively, and especially respondents from co-ed high schools answered more negatively. Respondents from all types of high school, especially those from girls' high schools answered positively to the question regarding standards, function of performance assessment, appropriateness of reflection rate and the number of assessment of students' knowledge and attitude. With regard to fairness of performance assessment and accuracy of self assessment and peer assessment, respondents from both boys' and girls' high schools answered positively, especially there were more positive answers from girls' high schools. Respondents from boys' and girls' high schools answered more negatively than those from co-ed high schools to the question regarding effectiveness of group assessment in performance assessment. To the question of contribution of performance assessment to humanistic education, respondents from co-ed high schools answered more negatively than those from boys' and girls' high schools. Respondents from boys' and girls' high schools showed positive responses on the contribution of performance assessment to academic achievement, whereas respondents from coeducational high schools showed negative responses. which is statistically significant(F=3.909, p= .021). However, aftermath verification showed that only respondents from boys' and coeducational high schools showed significant difference (p= .020).

한국과 대만의 하이테크 벤처기업의 해외사장진출전략 결정요인과 성과에 관한 비교연구 : 개념적 구조를 중심으로 Focused Upon the Conceptual Framework

김석수 국제무역학회 2002 국제무역연구 Vol.8 No.2

본 연구는 한국과 일본의 벤처기업의 해외시장진출전략 결정요인과 성과에 미치는 영향을 비교분석하기 위한 개념적 구조를 제시함을 주된 목적으로 하고 있다. 이를 위하여 벤처기업의 해외시장진출전략을 국제화 관점에서 검토하고, 영향요인을 몇 가지 이론적 배경을 바탕으로 검토한 후 분석을 위한 개념적 구조를 제시하였다. 이 개념적 구조에 따라 13개의 가설과 2개의 연구문제를 제안하였다. The aim of this study is to provide better insight into the foreign market entry strategy of New Ventures. The conceptual framework consists of three constructs of internal resource factor, business strategy factor, and industrial structure factor. Propositions related to these relationships are made. This paper suggests 13 research hypothesis in detail and two research questions for future empirical analysis.

수출제조기업의 로지스틱스기능과 마케팅기능의 통합 모형

김석수 국제무역학회 2003 국제무역연구 Vol.9 No.1

본 연구는 우리나라 기업의 로지스틱스기능과 마케팅기능의 통합에 영향을 미치는 요인들에 대한 실증적 분석을 통하여 기능통합을 설명하는 새로운 모형을 개발하는 것을 주된 목적으로 하고 있다. 이러한 목적을 달성하기 위하여 연구자는 기존의 연구들에 대한 문헌연구과정을 통하여 연구모형과 가설을 개발하고, 서베이를 통하여 수집된 자료를 이용하여 회귀분석을 실시하여 연구모형을 실증적으로 검증하였다. 회귀모형의 추정결과, 유의적인 설명변수를 제시하였고, 아울러 새로운 수정연구모형을 도출하였다. The researcher develops a framework for examining how and why logistics functional unit interact with marketing functional unit. A test of this framework based on the responses of 56 managers in Korean companies shows partially support for the propositions developed. To test the hypotheses, multiple regression was employed. The overall model proved significant and accounted for about 50% of variation in the dependent variable, integration. Two of the independent variables proved significants: middle management factor, connectivity. The remaining five were insignificant. The revised marketing-logistics integration model depicted in the main discourse reveals the variables that are significantly related to integration.

3차원 CT 영상을 이용한 정상교합자의 안면 연조직 계측 분석

유형석,한수연,백형선,김기덕 대한치과교정학회 발행 2005 대한치과교정학회지 Vol.35 No.6

최근 들어 3차원 전산화 단층 촬영(CT, Computed Tomography) 영상을 이용한 진단기법의 개발을 위한 연구가 활발히 진행되고 있으며 여러 분야에서 3차원적인 두개악안면 분석의 필요성이 증대되고 있다. 특히 교정 치료나 악교정 수술 후의 결과에 있어서 안면 연조직의 분석은 필수적이라 할 것이다. 본 연구에서는 정상교합을 가진 성인 남자 12명, 성인 여자 11명의 CT 영상을 촬영하여 개인용 컴퓨터 상에서 V works 4.0 프로그램 (Cybermed Inc., Seoul, Korea)으로 3차원 CT 연조직 영상을 재구성한 후에 soft tissue Nasion을 기준 원점으로 하는 3차원 좌표평면의 좌표계를 설정하여 정중선상의 soft tissue Nasion, Pronasale, Subnasale, Upper lip center, Lower lip center, soft tissue B, soft tissue Pogonion, soft tissue Menton 등 8개의 계측점과 양측성인 Endocanthion, Alare lateralis, Cheilion, soft tissue Gonion, Tragus, Zygomatic point 등 총 20개의 재현 가능한 안면 연조직의 계측점을 지정하였으며 V surgery 프로그램(Cybermed Inc., Seoul, Korea)을 이용하여 이들 계측점의 3차원적인 좌표와 기준 원점으로부터 각 계측점까지의 Net (δ=√ (X^(2)+Y^(2)+z^(2))) 값의 평균과 표준편차를 구하였다. 안면 연조직 분석의 3차원적인 이해를 돕기 위해 주요 계측점 간의 거리 계측을 시행하였고, 그 결과 Na'-Sn과 En(Rt)-En(Lt)를 제외한 대부분의 계측값에서 남녀간의 유의한 차이가 있었으며, 2차원적인 두부 방사선 규격사진이나 안면 사진으로는 정확한 계측이 어려웠던 Na'-Zy, Na'-Ch, Na'-Go' (facial depth) 등의 정상치도 구하였다. 이상의 자료는 부정교합 환자와 악안면 기형 환자의 3차원적인 진단 및 치료 계획에 참고자료로 사용될 수 있을 것이다. Studies for diagnostic analysis using three-dimensional (3D) CT images are recently in progress and needs for 3D craniofacial analysis are increasing in the fields of orthodontlcs. It is especially essential to analyze the facial soft tissue after orthodontic treatment and orthognathic surgery. In this study 3D CT images of adults with normal occlusion were taken to analyze. the facial soft tissue. Norms were obtained from CT images of adults with normal occlusion (12males, 11 females) using a computer program named V works 4.0 program. 3D coordinate planes were established using soft tissue Nasion as the reference point and a total of 20 reproducible landmarks of facial soft tissue were obtained using the multiple reconstructive sectional images (axial, sagittal and coronal images) of the V works 4.0 program: soft tissue Nasion, Pronasale, Subnasale, Upper lip center, Lower lip center, soft tissue B, soft tissue Pogonion, soft tissue Menton, Endocanthion (Rt/Lt), Alare lateralis (Rt/Lt), Cheilion (Rt/Lt), soft tissue Gonion (Rt/Lt), Tragus (Rt/Lt), and Zygomatic point (Rt/Lt). According to the established landmarks and measuring method, the 3D CT images of adults with normal occlusion were measured and the normal positional measurements and their Net (δ=√ (X^(2)+Y^(2)+z^(2))) values were obtained using V surgery program. In the linear measurement between landmarks, there was a significant difference between males and females except Na'-Sn and En(Rt)-En(Lt). The normal ranges of Na'-Zy, Na'-Ch and Na'-Go' (facial depth) were obtained. which was difficult to measure by two-dimensional (2D) cephalometric analysis and facial photographs. These data may be used as references for 3D diagnosis and treatment planning for patients with malocclusion and dentofacial deformity.

Tripledecker 착물, (CpCo)_2(C_4R_4)과 Alkyne과의 반응

嚴在國,李元植,金碩峯,車震淳,李炯秀,李東鎬,金洪碩,沈相喆 대구효성가톨릭대학교 자연과학연구소 1993 基礎科學硏究論集 Vol.1993 No.1

트리플데카 착물류, bis-(η^5-cyclopentadienyl)-μ-(η^4-1,2,3,4-tetraalkylcyclobutadiene)dicobalt들은 Jonas시약과 2-hexyne 또는 3-hexyne을 실온에서 동량으로 반응시킬때, 50% 이상의 최대 수율이 얻어졌다. 한 종류의 트리플데카 착물인 bis-(η^5-cyclopentadienyl)-μ-(η^4-1,2,3,4-tetraalkylcyclobutadiene)dicobalt(13)는 실온에서 3-hexyne과 반응시키면, 착물 (η^5-cyclopentadienyl)cobalt-acyclopentadiene-μ-(η^4-2,4-cobaltacyclope-ntadiene)(η^5-cyclopentadienyl)cobalt(15)로 이성화되었다. 다른 한 종류의 트리플데카 착물, bis-(η^5-cyclopentadienyl)-μ-(η^4-1,3-dimethyl-2,4-dipropyl-cyclobutadiene)dicobalt(14)를 2-hexyne 과 반응시켰더니 1,3,5-tri-methyl-2,4,6-tripropyl benzene화합물이 생성되었다. The tripledecker complexes, bis-(η^5-cyclopentadienyl)-μ-(η^4-1,2,3,4-tetraalkylcyclobutadiene)dicobalt were produced by the reaction of Jonas reagent with 2-hexyne and 3-hexyne in the maxi-mum yield(above 50%) when they were reacted in eq-molar amounts at room temperature. A tripledecker complexes,bis-(η^2-cyclopentadienyl)-μ-(η^4-1,2,3,4-tetraalkylcyclobutadiene)dicobalt(13) was isomerized to (η^5-cyclopentadienyl)cobalt-acyclopentadiene-μ-(η^4-2,4-cobaltacyclope-ntadiene)(η^5-cyclopentadienyl)cobalt(15) on reacting with 3-hexyne at room temperature. Another tripledecker complex, bis-(η^5-cyclopentadienyl)-μ-(η^4-1,3-dimethyl-2,4-dipropyl-cyclobutadiene)dicobalt(14) was decomposed to give 1,3,5-trimethyl-2,4,6-trip-ropylbenzene through an intermediate complex by the reaction of 2-hexyne.

폐모세포종 : 1례보고 A Case Report

최영호,서홍주,임영혁,김정중,박성강,이석기,임진수,김은규 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2

Pulmonary blastoma is a very rare primary neoplasm of the lung. We experienced a case of pulmonary blastoma in a 40 years old man. The mediobasal segmentectomy of the right lower lobe was performed. The patient was discharge on the postoperative days 6. There is no evidence of recurrence or metastasis on followup study during 7 months period after operation.

개심술(開心術)의 임상적 고찰 : 치험 200예 200 Cases

최형호,서홍주,임영혁,김정중,배대양,이석기,임진수 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.2

Background and Objectives: Two hundred cases of the open heart surgery due to congenital and acquired heart disease were done using the cardiopulmonary bypass in the Department of Thoracic and Cardiovascular surgery, Chosun University Hospital from November, 1980 to June, 2001. Material and Methods: The number of congenital heart disease was 132 cases. 68 cases were acquired heart disease. 'The age of the congenital heart disease was from 22 days to 45 years. In the acquired heart disease, the age was from 14 to 72 years. Result: Congenital heart disease consisted of 113 congenital acyanotic heart disease, 19 congenital cyanotic heart disease. Corrective operation was done for congenital heart disease with 4. 5 % operative mortality. Of 68 cases acquired heart disease, 44 patients were valvular heart disease, 3 cardiac tumors, 9 ischemic heart diseases, 12 aortic dissections and etc. The operative mortality was 13%. Conclusion: The postoperative complications were appeared in 68 cases and the complications were wound infection, occipital alopecia, low cardiac output syndrome, arrhythmia, septicemia etc. The mortality after open heart surgery was 15 cases and the causes of death were low cardiac output syndrome, septicemia, respiratory failure and left ventricle rupture.

Additive effect of probiotics (Mutaflor) on 5-aminosalicylic acid therapy in patients with ulcerative colitis

Soo-Kyung Park,Sang-Bum Kang,Sang Soo Kim,Tae Oh Kim,차재명,Jong Pil Im,Chang Hwan Choi,Eun Soo Kim,Geom Seog Seo,Chang Soo Eun,Dong Soo Han,Dong Il Park 대한내과학회 2022 The Korean Journal of Internal Medicine Vol.37 No.5

Background/Aims: In ulcerative colitis (UC) patients, Escherichia coli Nissle 1917 (EcN) is equivalent to mesalazine for preventing disease relapse; however, evidence of the ability of EcN to increase health-related quality of life or induce remission remains scarce. We investigated the efficacy of EcN as an add-on therapy for UC. Methods: In this multicentre, double-blind, randomised, placebo-controlled study, a total of 133 UC patients were randomly assigned to receive either EcN or placebo once daily for 8 weeks. Inflammatory bowel disease questionnaire (IBDQ) scores (primary endpoint) and clinical remission and response rates (secondary endpoints) were compared (Clinical trial registration number: NCT04969679). Results: In total, 118 patients (EcN, 58; placebo, 60) completed the study. The number of patients reaching the primary endpoint did not differ between the EcN and placebo groups (30 [51.7%] vs. 31 [51.7%]; per-protocol analysis, p = 1.0; intention- to-treat analysis, p = 0.86). However, significantly fewer patients in the EcN group exhibited a decreased IBDQ score (1 [1.7%] vs. 8 [13.3%]; per-protocol analysis, p = 0.03; intention-to-treat analysis, p = 0.02). Moreover, a significantly higher number of patients in the EcN group displayed clinical response at 4 weeks (23 [39.7%] vs. 13 [21.7%], p = 0.04) and endoscopic remission at 8 weeks (26 [46.4%] vs. 16 [27.1%], p = 0.03). Conclusions: Although the number of patients reaching the primary endpoint did not differ between the EcN and placebo groups, EcN was found to be safe and effective in preventing the exacerbation of IBDQ scores and achieving clinical responses and endoscopic remission in patients with mild-to-moderate UC.

다양한 고염투석액을 이용한 혈액투석시 혈액량의 변화 및 부작용 발생의 관찰

김홍수,김상돈,김도헌,김헌종,고광현,김승정,마경애,김명성,정철권,이한민,지석배,신규태 대한신장학회 1999 Kidney Research and Clinical Practice Vol.18 No.3

Chronic hemodialysis patients frequently experience hemodialysis(HD)-related side effects caused by excessive ultrafiltration and abrupt change of osmolality. Sodium ramping in HD is known to reduce ultrafiltration-related side effects, but it frequently induces symptoms related to sodium overload. We wanted to know the relationship between blood volume changes and the side effects related to ultrafiltration during hemodialysis and whether we can individualize various sodium ramping methods according to the effect of change in blood volume( BV) and side effects of sodium ramping. We studied 9 hypotension-prone patients during HD. The duration of the study lasted for 5 weeks, each week using different sodium ramping protocols: protocol 1; dialysate [Na+] of 140mEq/L, protocol 2; dialysate [Na?] same as the predialysis serum [Na+], protocol 3; dialysate [Na+] was 20mEq/L greater than that of the patient's serum for 1hr, 10mEq/L greater than patient's serum [Na+] for 2hr and then the same as patient's serum] for the last 1hr, protocol 4; at the beginning of dialysis, dialysate sodium was ramped to 20mEq/L above the patient's serum sodium and then on a straight linear fashion lowered to the predialysis serum [Na+] at the end of dialysis, protocol 5; sodium was constantly ramped to 10 mEq/L above serum [Na+]. We measured the BV with Crit-Line IIR(In-Line Diagnostics, Corp., Riverdale, USA), the blood pressure during each HD and interdialytic weight gain. We documented subjective symptoms which occurred during the 5 treatment protocols by patient's questionnaire after each HD. The results were as follows. 1) The mean age of the patients(M:F=3:6) was 54.1years and 6 patients were diabetics. 2) There was no significant difference in the BV among the 5 protocols in both whole study population and individual. Neither was there a statistically significant difference in the BV with respect to hypotension during HD. 3) There were no episodes of hypotension(P value $lt;0.001) with protocols 3, 4, 5 compared to protocs 1 and 2. 4) Three patients during protocols 4 and 5 experienced more thirst after HD than during protocol 1 and one patient during protocol 4, 5 had more interdialytic weight gain than the protocol 1. As a whole, patients while on protocol 4 & 5 experienced more thirst than protocol 1 but patients during protocol 3 experienced the same degree of thirst as protocol 1. In summary, sodium ramping reduced HD-related side effects but this benefit could not be explained on the basis of blood volume change measured by the Crit-Line IIR. Protocol 3 may be more appropiate sodium ramping method in 4 of the 9 patients. These data suggest that protocol 3 may be used before protocol 4, 5 when we apply sodium ramping to the patients who frequently have hypotension during HD.