승용차용 전동식 워터펌프의 최적설계를 위한 관련변수의 영향

임상혁, 이석호, 이계복 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

Electronic water pump(EWP) of vehicle automatically can run engine cooling function regardless of engine speed, so that it reduces remarkably fuel consumption. A numerical analysis was carried out in order to optimize the impeller and volute design for EWP and to investigate the sensitivity of the related parameters using CFD commercial code FLUENT V14.5. The feasible range of related parameters for EWP was obtained. The obtained result will be applied to develop EWP as important design data

部分的肝壤死白鼠의 血淸內에 出現하는 肝細胞 核分裂促進因子에 關한 硏究 : 第2編 肝細胞核分裂促進因子의 理化學的性狀 Part 2. Biochemical Nature of the Hepatic cell Mitosis-stimulating Factor

李承馥 醫藥係社 1961 綜合 醫學 Vol.6 No.10

스프레드 시트 교육용 CAI 프로그램 설계 및 구현 : 고등학교 정보산업 교과 '계산표 작성' 단원을 중심으로

고선복,이성근 順天大學校 1998 論文集 Vol.17 No.1

This study was carried out to implement the CAI program for spread sheet education, to apply in teaching-learning course and analyse whether the program is suitable for the island area. The evaluation was made through two groups of the subjects; the learner control group and program control group in K high school in Go-hung Goon. This study analyzed the response and problems through the evaluation, learning contents of the program and the degree of interest in the program at the time of feed-back.

객체지향언어 자바의 연구

이상복,박의준 대구효성가톨릭대학교 교육연구소 1998 교육연구논집 Vol.6 No.-

In this paper some problems and insecurity of JAVA are considered in the aspects of Web browser and presented the future of the language. Compared among C/C++ and other object- oriented languages, some problems suspected mechanics and mechanical effects of JAVA are suggested and analyzed.

腫瘍 Chromantin注射에 依한 腫瘍發生에 關한 硏究

李承馥,秦柄鎬 醫藥係社 1954 綜合 醫學 Vol.11 No.1

한국 민간경비 마케팅 전략 수립방안

이상철,김상균,김태복 龍仁大學校 2008 용인대학교 논문집 Vol.26 No.-

Korea's private security services has been successful in its growth in size, though research on qualities and competition has been stagnated. Also, the subject lacks the expertise, finances, and the technics causing dissatisfactions from the customers. Therefore, private security service companies are in great needs of diverse marketing strategies to fulfill the satisfaction of the customer, such strategies are providing an education for employers, or restructuring company, and for the last, benchmark more advanced companies. This research shows diverse strategies by using "SWOT" method, analyzing the inner and outer environment of the market, also setting the result of the analysis as a basis, establishing "STP" strategy that subdivides the market, and after choosing the objective market, customer who devise marketing mix strategy, and product oriented marketing strategy were provided, to satisfy the customers. When the companies product weren't selected by the customers, there has to be a reason. Before showing customers the product, people who are in security business should think what would the customers want, what would they like, what would they think, what would they dislike first. Company should be able to answer these questions, and the To be successful on customers and product oriented marketing activities, when meeting with customers, company should be more convenient, and also focusing on elevating the qualities of the services. Private security business could categorize as service, therefore securing structure, or securing civilians could define as products. To increase the qualities of the product, there has to be more veterans. to solve this problem, there has to be industrial, and educational supports, also through detailed analysis, company should set the standard price for the service, so that it would prevent the dumping of the price. When dealing with distribution and acceleration, security industry transact customers directly so that there might be some difficulties when employees don't have the right etiquettes around customers. Therefore educating employees on manners, as well as the work that employees assigned to do, will help companies to get close to the customers much easier. Company should be using online marketing, enables the company to respond to the customers man to man, accumulate potential customers for the future references.

Continuous wave of obturation technique에서 플러거의 다양한 적용 깊이에 따른 근단부 폐쇄효율 비교

이상진,박정길,허복,김현철 大韓齒科保存學會 2007 Restorative Dentistry & Endodontics Vol.32 No.6

이 연구와 목적은 continuous wave of obturation technique으로 근관 충전을 할 때, 다양한 heat source plugger의 깊이에 따른 근단부 근관 폐쇄능력을 비교하는 것이었다. 직전 형태 발거 소구치를 #35/.06크기까지 니켈티타늄 파일을 사용하여 성형 및 세정하였다. 성형과 세정이 완료된 치아를 heat source plugger의 적용 깊이에 따라 15개씩 5군으로 분류하였다: 3 mm, 4 mm, 5 mm, 6 mm, 7 mm. 양성 대조군을 제외한 모든 근관은 E&Q plus (Meta Biomed Co., Chungju, Korea)를 사용하여 #35/.06 gutta-percha cone으로 충전하였다. 모든 치아의 근첨공 주변 1 mm를 제외하고 nail varnish를 도포하였고 음성 대조군은 근첨공을 포함하여 전체 면을 도포하였다. 모든 시편을 1% 메틸렌블루 용액에 72시간 동안 보관한 다음 치근첨으로부터 1, 2, 3 mm 높이에서 수평으로 절단하였다. 각 단면을 12.5 x 2.5배 현미경하에서 관찰하고 디지털 카메라로 촬영하였다. 염색제 누출 평가를 위해 five-degree scoring system을 사용하였다. 각 절단면에서의 점수를 모두 합하여 한 시편의 점수로 사용하고 통계학적 분석을 하였다. 이 실험 조건하에서, 3 - 7 mm 까지의 heat source plugger의 적용 깊이는 근단부 폐쇄에서 유의한 차이를 나타내지 않았다. 5 - 7 mm의 Buchanan's protocol을 포함한 3 - 7 mm를 모두 임상 적용에서 받아들여질 만하다고 보인다. The purpose of this study was to compare apical sealing ability of continuous wave canal filling technique according to various heat source plugging depths. Eighty one extracted human premolars with straight root were cleaned and shaped to size 35 using .06 taper rotaiy NiTi file. After cleansing and shaping, the teeth were divided into 5 groups following the heat source probing depths from the apex ; 3, 4, 5, 6 and 7 mm. All specimens were filled using E&Q Plus with #35/.06 tapered gutta-percha cone. The positive control teeth were not filled. All teeth were coated with nail varnish except the apical 1 mm around the apical foramen. Negative control teeth were completely sealed include the apical foramen. All specimens were immersed in 1% methylene blue solution for 72 hours. Then the specimens were sectioned horizontally at 1, 2 and 3 mm from the root apex. Each sectioned surface was photographed using a digital camera attached to the stereomicroscope at 12.5 x 2.5 fold magnification. All points at 1, 2 and 3 mm were summed as final score of one specimen. Statistical analysis of the collected data was performed. Under the condition of this study, there was no significant difference between the heat source plugging depths of 3, 4, 5, 6 and 7 mm in apical sealing ability. All of apical heat source plugging depth from 3 to 7 mm including Buchanan's protocol -from 5 to 7 mm- seems to be acceptable in clinical application.

All-in-one adhesive의 다층적용이 미세인장결합강도에 미치는 영향

손성애,허복 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.5

The purpose of this study was to evaluate the effect of multiple application of all-in-one dentin adhesive system on microtensile bond strength using confocal laser scanning microscope and microtensile bond strength test. Flat occlusal dentin surfaces were prepared using low-speed diamond saw. In group I, Scotchbond Multipurpose (SM) was applied by manufacturer's recommendation. In group II, after Adper Prompt L-Pop was applied for 15s and light cured for 10s. the second coat was re-applied and light-cured. In group III, after light-curing the second layer. the third coat was re-applied and light-cured. Specimens bonded with a resin-composite were sectioned into resin-dentin stick for measuring the adhesive layer thickness by confocal laser scanning microscope and evaluating micro-tensile bond strength. The adhesive layers of three-step dentin adhesive system. 3 coats of Adper Prompt L-Pop had significantly thicker than SM. 2 coats of Adper Prompt L-Pop (p < 0.05). However. there was no significant differences in bond strengths between SM and 3 coats of Adper Prompt L-Pop (p > 0.05). And SM. 3 coats of Adper Prompt L-Pop had significantly higher than 2 coats of Adper Prompt L-Pop in bond strengths (p < 0.05).

高精密 高速 스핀들의 設計

韓福洙,朴性煥 한밭대학교 산업과학기술연구소 2001 논문집 Vol.5 No.-

The high speed precision spindle, which is an important element part of industrial machinery such as micro drilling, high speed machine tools and the atomizer. In this study, the aero-static spindle was designed and a stiffness analysis of air bearing was carried out to investigate the optimal design parameter for the high speed spindle.

두꺼운 적층 복합재료 구조물 해석을 위한 3차원 복합재 적층 육면체 요소의 개발

윤영복,하성규 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1

3차원 적층 복합재 구조물의 해석을 위한 3차원 다적층 복합재 육면체 요소가 적층정보 자동 입력 모듈과 함께 제안되었다. 개발된 요소는 요소내에 다양한 물성치 정보를 포함하며 가장자리에 적층 절단면이 존재하는 요소의 해석이 가능한 ply-drop-off요소이다. 요소의 정확도가 엄밀해와의 변위 및 면내응력의 비교를 통해 검증되었다 개발원 요소는 전형적인 유한요소법에 손쉬운 정식화 및 적용이 가능하며 개발된 요소와 제안된 적층정보 인식 모듈은 엄밀해와 비교, 검증되었다. 본 요소를 사용함으로써 정확도의 변화없이 해석시간과 저장용량 및 요소를 현저히 줄일 수 있다. A three-dimensional multilayered brick element with automatic input module of layup information in the element is developed to analyze the behavior of complicated three dimensional laminated composite structures. The developed element can contain the varying material properties within the element and allow the ply-drop-off along the element edges. The accuracy of the displacement using the element is well verified with the analytical solution. The computer time and memory space can be significantly saved using the ply-drop-off element. This method is easy to formulate and apply for the conventional finite element method. Exact solution is compared with the results using the developed element and proposed method. While the number of element is quite reduced, the results still have a satisfactory accuracy.