탄성 의치상 이장재의 캔디다 알비칸스 부착도에 관한 실험적 연구

하일수,조주온,이상돈,송광엽,박찬운 全北大學校 齒醫學硏究所 1992 전북치대논문집 Vol.10 No.1

The purpose of this study is to compare the response of four commercially available soft denture lining materials to the growth of C. albicans in vitro. Twelve samples of each soft lining materials were made to a uniform size and volume(15×5×4㎜) and sterilized using ethylene oxide. The samples were individually placed in culture tubes containing 5㎖ of sterile SDB(sabouraud dextrose broth dehydrated) and 0.1㎕ of activated C. albicans(ATCC 10231). The culture tubes had been incubated in incubator at 37℃. Three samples of each material had been tested at 3, 21, 35 and 56 days to determine the number of adherent cells of C. albicans on their surfaces and the number of nonadherent cells in the broth associated with each samples. The data have been analyzed by ANOVA and Scheffe test. The results have been obtained as follows : 1. In growth patterns of C. albicans within soft lining materials, Molloplast-B and K-33 were significantly higher(p<0.01) compared with Coe-Soft, but there was no significant difference between Coe-Soft, Coe Super-Soft and Mollosil(p>0.05). 2. Molloplast-B showed significantly higher(p<0.01) amounts of C. albicans adhering to its surface than other materials under experimental conditions. 3. Generally, adherence was significantly increased until 5 weeks, and after then showed decreased pattern in all materials(p<0.01). 4. The C. albicans was able to penetrate the inner portion of all samples. Coe-Soft showed most amounts of invaded C. albicans, followed in order by Mollosil, Molloplast-B, and Coe Super-Soft.

배 농가의 경영효율성 분석 : 비모수적 접근방법에 의한 사례연구 A case study using non-parametric method

우수곤,유진채,강경하,신용광 한국농촌지도학회 2002 농촌지도와 개발 Vol.9 No.2

The objective of this study was to compare the farm efficiency of members of cooperative firms with that of non-members in Korea. Data were collected from 27 farms members of three cooperatives and 13 non-member farms, based on the managerial achievements of 1999. For the analysis, the data were divided into three different farming types: type I and Ⅱ of member farms and non-member farms. Economic analysis were implemented using DEA(Data Envelopment Analysis). Major findings was as follows. Total average technology efficiency was 0.782, which implies that there still remains 21.8% of improvement possibility. Among the time types, type I showed the highest technology efficiency of 0.9055, while " 11 and non-member farms showed 0.7670 and 0.7171, respectively. This means that these farms have relatively high potential improved. Also, comparing technology efficiency by dividing into pure technology and scale efficiency, all type of the farms exhibit a higher pure technology efficiency compared to scale efficiency. Therefore, to improve current technology efficiency, farms need to focus more on pure technology efficiency improvement. Meanwhile, profit analysis based on farm size indicate that most of the farms demonstrated the increasing-return-to-scale, which means it is necessary to extend the farm size to improve technical efficiency. Type I member farms achieve higher profit and efficiency than other two types and relatively higher producer prices through introducing cooperative sorting, grading and packing. Also, these labor saving technologies increased farm size.

폐기물 관리와 향후 대책

박광하,김한수,권영두 7개 국립대학교 환경연구 논문집 공동발행 위원회 2001 환경연구논문집 Vol.1 No.1

오늘날 우리가 직면한 환경문제 중 하나인 폐기물에 대한 기본 개념을 이해하고, 우리 나라 폐기물의 발생현황을 살펴보며, 여러 가지 폐기물을 처리하기 위한 방법과 폐기물을 자원화 하는 방법에 대해 고찰하였다. 폐기물은 발생단계에서 원천적으로 줄이는 노력이 무엇보다 중요하며, 또한 발생된 폐기물에 대해 효과적으로 대처하기 위해서는 경제성을 고려한 기술개발을 통하여 저렴하고 안전하게 폐기물을 처리해야 한다. 또한 현대 사회는 대량생산과 대량 소비를 하는 사회경제체제에서 비롯되었기 때문에 이를 효과적으로 극복하기 위해서는 대량생산, 대량소비 체제를 지속 가능한 자원순환형 사회경제 체제로 전환시켜 폐기물 발생을 방지하는 방향으로 나아가야 할 것이다.

유도 전동기를 위한 자기 동조 퍼지 제어기 설계

전광호,하남수,박준열,김상윤 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2

The conventional PI control, that are used in the control loop for outer speed of the induction motor, also has difficulty dealing with the dynamic speed tracking, parameter variation, and the load disturbance. As a result, the motion control system operates with a poor performance in the motor´s low speed range. In this paper, a novel speed control system that implements the fuzzy logic controller(FLC) is proposed. The proposed FLC used the speed error, its rate of change, and the drive current as three fuzzy variables. The real command output current is chosen by the defuzzification of the fuzzy output extracted from the fuzzy control rules. The flux and the torque of the induction motor are estimated using the dynamic model with an excellent dynamic response over a wide speed range and with the rotor flux field-oriented scheme of the decoupling characteristics. The performance of this control system is substantiated by computer simulations.

대학 체육교육과와 체육학과의 전공교육과정에 대한 비교연구 : 과목명칭과 학점 및 시간수를 중심으로

이광재,하명수,김윤래 江原大學校附設體育科學硏究所 1988 江原大學校附設體育科學硏究所論文集 Vol.- No.13

To identify the difference of Major Curriculum between Department of Physical Education in College of Education of both different department were compared as follows. Theoritical Subjects had more Score than Practical Skill, and elective Subjects had more score than required subject in a credit of Major subject. There was no differencies in the name of Subject. The numbers of credit according to theoritical area on major subject which consists more score than other major subjects were following orders; Teaching of P.E, Measurement and Evaluation of Physical Education, Health Education, and Sports Philosophy in P.E Dept. of Educational College. Sports Philosophy, Sports History, Measurement and Evaluation of P.E, and Administration of P.E in P.E Dept. of College of Sports Science. On the other hand practical skill of major subjects was following order. Ball Game, Gymnastics, Dance, and Tract and Field in both Department. But there is much more needs of course of study for handcapped.

페니토인을 복용중인 젊은 간질환자에서 발생한 대퇴골 골절

하윤석,김광수 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.1

Background and purpose: The use of antiepileptic drugs for a long period is a known risk factor for bone loss and pathological fracture. An increased risk of fractures due to long-term treatment with antiepileptics has been attributed to the alterations in the levels of circulating calcium, calcitropic hormones and high homocysteine levels. The purpose is of this study to report bone fracture in an epileptic patient on chronic use of phenytoin may be associated with lower BMD (bone mineral density) and high plasma concentration of homocysteine. Case: We report a case of a 35 year old young male who had been on phenytoin for 31 years presenting with a pathological femur fracture and frequent complex partial seizures. The plasma homocysteine level was increased as much as 15.93 μmol/L. BMD of the lumbar spine and femur head were low. MRI of the thigh showed fibrodysplasia with cystic degeneration and pathologic fracture in the right proximal femur. Conclusion: A patient on chronic use of phenytoin has alterations in bone metabolism characterized by lower BMD of the lumbar spine and femur and high plasma concentration of homocysteine. An increased risk of bone fracture in an epileptic patient may be associated with osteoporosis and high homocysteine.

강릉大學校에서의 有害實驗廢棄物과 그 처리 現況

김한수,박광하 강릉대학교동해안지역연구소 1993 東海岸硏究 Vol.4 No.3

강릉대학교 내의 각종 실험실에서 배출되는 有害 實驗廢棄物의 종류를 파악하고, 현재 시행하고 있는 이들 폐기물들의 처리 방법에 대한 문제점에 대하여 검토하고 그 해결책을 모색하였다. This paper was focused on the list and the treatment method of harmful wasted chemicals discarded by the laboratories in Kangnung National University. We investigated the better way for treating the wasted chemicals.

직접 분사식 가솔린 엔진의 분사 조건 변화에 따른 실린더 내 분무 유동 특성에 관한 연구

전문수,장광진,황용하,최원호 忠州大學校 2005 한국교통대학교 논문집 Vol.40 No.2

This study presents the spray characteristics of high pressure swirl type gasoline injector for the application of direct-injection gasoline engine. For the purpose, Mie seattering technique and the PDPA(Phase Doppler Particle Analyzer) measurements were used for the fundamental spray characteristics, In-cylinder spray flow motion was also visualized in order to optimize combustion system of the engine. Various fuel injection conditions such as intake flow condition, different combustion chamber shape, fuel injection timing, and engine speed were considered to obtain the detailed in-cylinder spray characteristics by use of ICCD(Intensified Charge Coupled Device) camera through the single-cylinder potical engine. From the experimental results, the test injector shows a good low-end linearity between the dynamic flow and fuel injection pulse width and the fuel spray of 20mm or less in SMD(Sauter Mean Diameter) with good spray symmetry. In addition, the in-cylinder tumble flow has more effect on the homogeneous mixture formation than that of in-cylinder swirl flow at early injection mode and the in-cylinder swirl flow plays a better role of stratified mixture preparation than tumble flow at late injection mode.

全國 淡水魚의 被囊幼蟲 感染現況

한인수,홍광선,윤영식,윤청하,김금주 대한임상병리사협회 1986 임상병리사회지 Vol.18 No.1

도암호의 수질과 어류군집 특성 연구

이상하,최재석,이광열,장영수,임인수,허우명,김재구,김범철 강원대학교 부속 환경연구소 2005 Journal of the Environment Vol.2 No.-

To investigate nutrient dynamics of the lake and fish community, both water and fish samples were collected at three different areas (dam site, upper inflowing and downstream of lake outfow) for one year from Sep.2004 to Aug.2005 During the experimental periods, mean concentration of chl, a in epilimnetic layer (0-5m) was 18.5mg^(-3) and transparency ranged from 0.3m to 2.4m, respectively. In nutrient, mean concentrations of TP and TN were 111 mgP m^(-3) and 4.4 mgN L^(-1), respectively. Based on the water quality standard suggested by U.S.EPA(*1976), the trophic state of Lake Doam was classified as eutrophic state. Total number of fish collected in Lake Doam was 9,600 indiveduals in 26 species of 6 family. Sixteen of Korean endemic soecies including H. mylodon, A. signifer, P. tenuicorpa occurred. O. mykiss as introduced fish was also found in Lake Doam. Dominant and subdominant species were P. herzi and Z. platypus that took about 34.6% and 22.5% of total fish composition, respectively. Six species including A. signifer. P. tenuicorpa. and R. kumgangensis were rare in Lake Doam. Pelagic typw of figh commonly occurred at upper regions, whereas benthic type was mainly domenated at downstream area. Therefore, pollution source inflowed from the upper regions did not seriously affect downstream area (Songcheon water system) due to the role of dam as pollutant barrier. In addition high appearance of Comat type of fish that si hybrid between gold fish (C.auratus) and C. auratus was found in the lake, It was unclear the reasons that high prorortion of mutant species apperared in the lake. Further more researches are required in this area.