체육 서비스조직의 리더십유형과 직무만족 및 조직유효성 간의 관계

천길영,남궁완,최병학,박효찬,홍승달,정석현 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The purpose of the study was to examine the relationship among style of leadership, job satisfaction, and efficacy of sport service organization. In order to achive this purpose three reaserch questions were established. Participants for this study were 300 of 23-50 overaged public workers. Of participations valid data were 279. They completed a modified inventory of the style of leadership, job satisfaction and efficacy of sport service organization. More details, style of leadership Scale modified by Ahn(2000), job satisfaction by Ahn (2000) and efficacy of sport service organization by Kim(2001) were using after remodifing scale to investigate the purpose of this study. Results were analysed in quantitative approaches. Data were collected through self-administered survey. The most three meaningful results of the study were as follows; First, there was influenced to relationship between style of leadership and job satisfaction. Second, there was influenced to relationship between style of leadership and efficacy of sport service organization. Third, there was influenced to relationship among style of leadership, job satisfaction, and efficacy of sport service organization.

생체용 Ti합금의 양극분극특성에 미치는 Zr 및 Pd의 영향

정종현,이길홍,최칠남,노학,백승남,이상열 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.2

The corrosion resistance of Ti-Zr-Pd-Cr alloys were investigated in order to reveal their possible use for new biomedical implant materials. Titanium alloys consisting of 10∼20%Zr, 0.0∼0.4%Pd and 0.15%Cr were prepared by vacuum arc-melting as alloying elements instead of using hardness Al and V in response to recent concerns about the long term safety of Ti-6%Al-4%V ELI alloys. The Ti-Zr-Pd-Cr alloys were heat-treated at 1000℃ for 2hrs under a vacuum atmosphere. The effect of Zr and Pd Ti alloys on the corrosion resistance for biomedical implant was investigating the anodic polarization curve at 37℃ in 5%HCI solution deaerated by high-purity N₂gas bubbling. The critical current density for passivation(I ) of Ti-Zr-Pd-Cr alloys didn't reveal markedly. Passive current density(I ) at 1.0V vs. SCE of this alloys decreased with increasing Zr in the contents from 10 to 20% and decreased with containing Pd in the range from 0.2 to 0.4%. Potential(E ) at 0.1A * m-² of this alloys increased with increasing Zr in the contents from 10 to 20% and increased with containing Pd in the range from 0.2 to 0.4%. For the Co-30%Cr-6%Mo alloy, passivity zone is narrow, and rapid increase of current density result from the low potential in comparison with Ti and Ti alloys. The corrosion resistance by the anodic polarization of Ti-20%Zr-0.2%Pd-0.15%Cr alloy was found to be superior to those of the Ti, Ti-6%Al-4%V alloy and Co-30%Cr-6%Mo alloy. The passive films formed on the Ti-20%Zr-0.2%Pd-0.15%Cr and Ti-6%Al-4%V alloys in the anodic polarization test consist mainly of TiO₂, Ti compound, ZrO₂, Al₂O₃and V₂O₃.

建築工業敎育科 敎育改善에 관한 硏究 : 敎育課程을 中心으로 Focused on the development of curriculum

李昌甲,朴萬植,延吉煥,崔武革,李基男 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.1

Due to the radical change of society and the technological innovation, it is inevitable to rearrange the educational objective of the Department of Architectural Engineering Education and to reorganize the curriculum responding to the objective. In this study, all the current curricula of architectural institutions have been analized to identify problems, and the educational objective of the department of architectural engineering education have been established based on the objective of the College of Industrial Education. As the result of the above studies, the model curriculum for the major subjects have been developed in order to have following characteristics. 1. The required subjects were limited to the basic fields in order to cover the education in the technical high school. 2. The elective subjects were organized into three fields, namely, architecture, structural engineering, and building materials and construction to meet the diversified demands to a possible maximum extent.

A Note on H Cogroups

Choi, Kil Nam 울산대학교 1980 연구논문집 Vol.11 No.2

H group의 쌍대인 H cogroup의 개념을 소개하고, loop space를 쌍대화함으로써 H cogroup의 예를 제시한다. In this paper we shall introduce the concept of H cogroup, dual to that of H group and construct the example of H cogroup by dualinging the loop space.

A note on the Grassman manifolds G(k,n)

Choi, Kil-Nam 울산대학교 1987 연구논문집 Vol.18 No.1

Lie 群의 개념없이 Grassman다양체의 미분가능임을 보인 것이다. In this note shall try to show that the Grassman manifold G(k,n) is a differentiable manifold without using the concept of Lie group.

A note on a definition of Riemann integrable

Choi, Kil Nam 울산대학교 1981 연구논문집 Vol.12 No.1

Cauchy의 Riemann적분에 관한 정의는 오류가 있다. 왜냐하면 Cauchy의 합, 즉 ??는 변수 n에 관하여 수열도 함수도 아니며, net도 filter도 아니므로 Cauchy의 합의 극한을 생각할 수 없기 때문이다. 이러한 오류를 시정하기 위하여 filter의 극한에 대한 이론으로서 Riemann적분을 정의한다. Cauchy's definition for the Riemann integral is non-sense, for the Cauchy's sum ??, where ??, ??, of with respect to variable n, and more over it is not a net or a filter, hence we are not able to consider the ??. In this note we try to define the Riemann integral in terms of limit process more strictly.

On an aspect of the undecidable problem

Choi, Kil-Nam 울산대학교 1986 연구논문집 Vol.17 No.1

계산가능한 함수들의 집합의 농도가 ???(자연수집합의 농도)임을 주지의 사실로서 소개하고, 계산 불가능한 함수들의 집합의 농도는 적어도 ??(연속체의 농도)와 같음을 증명해 보임으로서 idealized computer에서도 결정 불가능한 문제들이 결정 가능한(즉 계산 가능한)문제보다 훨씬 더 많이 있을 수 있다는 당연함을 보인 것이다. This paper introduces the fact that cardinality of the set of computable functions is ??? and proves that cardinality of the set of non-computable functions is at least equal to ??(the cardinality of continuum). By this proof, we can see a matter of course that there are more undecidable problems than decidable problems (that is, computable ones) in idealized computer.

CT 조영검사 시 Dual Trasfer set를 통한 업무의 효율성 및 근무만족도에 관한 연구

최재성(Jae Sung Choi),범희남(Hyi Nam Beom),전주섭(Ju Seob Jeon),최남길(Nam Kil Choi) 대한CT영상기술학회 2014 대한CT영상기술학회지 Vol.16 No.2

목적 : CT 조영검사 시 조영제를 인젝터 시린지에 담기 위해 기존에 사용중인 Single Transfer Set(STS) 대신 새로운 Dual Transfer Set(DTS)를 제작하여 임상 적용했을 때 방사선사의 업무 효율성 및 근무만족도에 대하여 평가하고자 하였다. 대상 및 방법 : 2013년 1월부터 2013년 12월까지 CT 검사를 시행했던 환자들 중 조영검사를 위해 새로 제작한 DTS를 이용하여 조영검사를 한 41,041건을 대상으로 하였다. 사용된 조영제는 주로 100ml, 150ml, 500ml, 1000ml였으며, 기존의 STS에 비해 DTS를 사용했을때 조영제 준비시간의 단축정도와 업무의 효율성 등 설문지를 통하여 근무만족도를 비교분석하였다. 결과 : 2013년 검사 총 건수는 65,457건이었으며, 이중 조영제를 사용한 건수는 41,041건으로 전체건수대비 62.7%를 차지하였으며, 조영검사 건수 중 대용량 조영제(500ml, 1000ml)를 사용했을때의 비율은 약 47.65%로 절반에 가까운 비중을 차지하였다. 조영제 준비시간을 분석한 결과 STS에 비하여 DTS를 사용하였을때 1건당 평균 30초의 검사시간이 단축되었다. 설문지를 작성한 방사선사 15명중 ‘처방별로 조영제를 사용한다’는 경우가 10명(67%), ‘성분명이 다른 조영제를 혼합사용하지 않는다’는 경우가 11명(73%), ‘기존의 STS보다 DTS를 이용했을때 검사준비가 용이하다’는 경우가 12명(80%), ‘DTS 사용 시 조영제 준비시간이 단축된다’라는 경우가 12명(80%), ‘DTS를 타병원에 추천할 의향이 있다’는 경우가 12명(80%)로 나타났다. 결론 : CT 검사건수는 CT 개발 이후부터 현재까지 증가 추세에 있고, 앞으로도 증가가 예상되며, 그에 따른 조영제 사용빈도 또한 증가할 것이다. DTS를 사용함으로써 대용량 조영제를 자주 교체하지 않아 감염 예방, 남아있는 조영제의 손쉬운 사용, 처방된 조영제를 사용함으로써 부작용이 발생한 환자의 관리, 준비시간 단축을 통한 업무의 효율성과 그로 인한 검사대기시간 단축, 조영검사 준비 시 간편함 등으로 근무만족도가 향상되어 임상적용을 적극 권장하는 바이다. Purpose : The purpose of this study is to research of radiologic technologists’ work efficiency and satisfaction by using Dual Transfer Set(DTS) instead of previously used Single Transfer Set(STS) to fill contrast media on Auto injector syringe in CT enhancement. Materials and Methods : From January 2013 to December 2013, 41,041 patients who underwent CT enhancement study using DTS were included in this study. Contrast media were used 100ml, 150ml, 500ml and 1000ml. Contrast media preparation time was checked between STS and DTS. Radiologic technologists’s work efficiency and satisfaction were checked by questionnaires. Results : The total number of tests in 2013 was 65,457 and CT enhancement were 41,041(62.7%). The cases of using large amount contrast media(500ml, 1000ml) was 47.65%. Contrast media preparation time using DTS was shortened CT scan time of 30 seconds than using STS. Radiologic technologists who participated in the questionnaire was 15. The case of using contrast media by prescription was 10(67%). The case of not using a mixture of two different contrast media was 11(73%), The answer that preparing the CT scan using DTS than using STS is easier was 12(80%). The answer that preparation time of CT scan reduces when using DTS was 12(80%). The answer that there is willingness to recommend DTS to other hospital was 12(80%). Conclusion : The number of CT scan is increasing since CT scan was developed and It is expected to increase in the future. It will also increase the frequency of use of contrast media. Using DTS in CT scan is expected to prevent infection because it is not necessary to replace a large amount contrast media frequently. It is ease to use of remained contrast media and is useful to manage of patients with side effects. Reducing CT preparation time will improve radiologic technologist’s work efficiency and satisfaction and it also will reduce CT check wait time. In this reason, DTS clinical application is highly recommended.

양측 하지 Direct CT Venography를 위한 카테터 제작 및 임상 유용성 평가

최재성(Jae Sung Choi),문일봉(Il Bong Moon),범희남(Hyi Nam Beom),전주섭(Ju Seob Jeon),최남길(Nam Kil Choi) 대한CT영상기술학회 2012 대한CT영상기술학회지 Vol.14 No.2

목적 전산화단층촬영(Computed tomography: CT)을 이용한 양측 하지 Direct CT venogaphy를 위해 새로운 카테터(reverse Y connector)를 제작하여 임상에 적용했을 때, 좌측과 우측을 각각 검사했을 때와의 환자선량(CTDIvol, DLP), 하지정맥에서의 조영증강 정도(Hounsfield Unit: HU)와 노이즈(Standard Deviation: SD), 재구성한 볼륨렌더링의 화질 등을 비교분석하여 임상적용 시 유용성에 대해 평가하고자 하였다. 대상 및 방법 2011년 12월부터 2012년 2월까지 심부정맥 혈전증으로 추적검사를 하는 환자들 중 과거 좌측과 우측을 Direct CT venography로 각각 시행했던 환자들을 대상으로 새로 제작한 Reverse Y connector를 이용하여 양측 하지 Direct CT venography를 시행한 25명의 영상을 후향적으로 분석하였다. 그 중 남자가 9명, 여자가 16명, 평균연령은 51세였다. 검사 장비는 Somatom Definition Flash(Siemens, Forcheim, Germany)였으며, 관전압은 100kV, 유효 관전류는 200mAs, 자동노출제어시스템인 caredose 4D를 사용하였고, rotation time은 0.5s, pitch는 1.0이었다. 검사방법은 발등의 정맥에 발가락을 향하여 주사바늘을 삽입한 후 Ankle joint 상방 10cm에 토니켓을 이용하여 강하게 묶은 다음 희석된 조영제(조영제 30%, 식염수 70%) 180 ml를 초당 1.5~2 cc로 주입하면서 심부정맥으로만 조영제가 흘러가게 한 다음, 희석된 조영제가 120cc 정도 주입되었을 때 토니켓을 풀어 심부정맥과 표재정맥에 조영제가 유입될 때 발끝부터 횡격막까지 bottom-up scan하였다. 결과 환자의 선량은 양측 하지(CTDIvol: 6.39±0.15mGy, DLP: 789.04±33.09), 우측하지(CTDIvol: 6.39±0.14mGy, DLP: 789.83±32.95mGyㆍcm), 좌측하지((CTDIvol: 6.41±0.14 mGy, DLP: 791.33±32.95 Gyㆍcm)로 나타나 각각의 편측으로 시행한 선량과 양측으로 동시에 시행한 선량이 통계적으로 유의한 차이가 없었다. 양흑 하지와 좌, 우측하지 검사후 하대정맥의 조영 증강 정도와 노이즈는 양측 하지(HU: 264.67±24.10, SD: 21.33±6.15), 우측하지(HU: 169.96±16.36, SD: 22.58±5.56), 좌측하지(HU: 170.38土13.26, SD: 23.50±6.12)로 양측 하지 검사의 하대정맥에서의 조영 증강 정도가 통계적으로 유의하게 높았고, 세 그룹간의 노이즈 차이는 없었다. 양측 하지와 우측하지, 좌측하지의 총장골정맥, 슬와정맥, 대복재정맥에서의 조영증강 정도와 노이즈 역시 세군간의 유의한 차이가 없었다. 볼륨렌더링의 화질 분석은 관찰자 세명 모두에서 양측 하지 검사가 편측검사보다 통계적으로 유의한 차이를 보였다. 결론 편측에 비해 양측 하지 Direct CT veonography가 선량을 반으로 줄임과 동시에 영상의 질 향상, 그리고 한번의 검사로 인한 경제적 효율성, 검사 소요시간의 단축 등 환자의 검사 만족도가 향상되어 임상적용을 적극 권장하는 바이다. I. Purpose We created a new catheter for the both lower extremities of direct CT venography which was applied to clinical. Tue aim of this study was to evaluate patient dose(CTDIvol, DLP), the degree of contrast enhancement, noise in venous and the quality of the reconstructed volume rendering by comparing both and left, right. II. Meterial and Methods From December 2011 to February 2D12, 25 patients with follow up deep vein thrombosis and who had direct CT venography and were retrospectively analyzed both lower extremities of direct CT venography. All patients, follow up direct CT venography was performed with the newly created Reverse Y connector. The patients were 9 men and 16 women and the mean age was 51 years. We obtained by using Somatom Definition Flash(Siemens, Forcheim, Germany and parameters value were 100 kV, 200 mAs, automatic exposure control system: caredose 40, rotation time: 0.5s and pitch: 1.0. The needle is inserted a dorsal vein toward toes. The tourniquet tie strongly 10 cm above the ankle. and then 180 ml(contrast 30%, NS 70%) of diluted contrast is only injected into the deep vein 1.5~2.0 cc per second. When diluted contrast agent is injected 120 cc. we unwrap tourniquet. We were scanned CT from the foot to diaphragm when contrast flow in deep-vein and superficial vein. III. Result The CTDIvol and DLP by each test there is no statistically significant differences for each both(CTDIvol: 6.39±0.15mGy, DLP: 789.04±33.09), right(CTDIvol: 6.39±0.14mGy, DLP: 789.83±32.95 mGyㆍcm), left(CTDIvol: 6.41±0.14 mGy, DLP: 791.33±32.95 Gyㆍcm), The Hounsfeild Unit of the degree of contrast enhancement and noise are as follows both(HU: 264.67±24.10, SD: 21.33±6.15), right (HU: 169.96±16.36, SD: 22.58±5.56), left(HU: 170.38±13.26, SD: 23.50±6.12). The degree of contrast enhancement of great saphenous vein in both lower extremity CT is statistically significant but noise is no difference between the three groups. the degree of contrast enhancement and noise of Iliac vein, popliteal vein, great saphenous vein by each test, there was no significant difference between the three groups. The quality analysis of reconstructed volume rendering image both sides than one side was a statistically significant difference. There were evaluated by three observers. IV. Conclusions The both lower extremities Direct CT veonography patient dose without degradation of image quality could be reduced by half than unilateral and we recommend for the clinical application because of economic efficiency resulting from a single test and improvement in patient satisfaction due to reduce testing time.

半側性 顔面痙攣의 微細神經外科的 治療

崔吉洙,金定植,吳世汶,丁惠源,黃聖男,洪承寬,高英超,李鉉球 대한신경외과학회 1978 Journal of Korean neurosurgical society Vol.7 No.2

Nine patients, 3 men and 6 women, ages 39 to 61, were operated on between May 1978 and August 1978 for classical hemifacial spasm. The operation consisted of a small retromastoid craniectomy performed through, a short vertical incision with microsurgical exploration of the cerebello pontine angle and vascular decompression of the facial nerve root exit zone. Decompression was maintained by interposing a small piece of muscle between the artery and the brain stem. Five patient have had complete relief of the hemifacial spasm. Three patients have had partial relief of the hemifacial spasm. One patient have had no relief of the hemifacial spasm.