망간페라이트 나노 분말의 수계분산거동 및 특성

배동식,김은정,한경섭 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

Dispersion stability of nanosized MnFe₂O₄ powders which was produced by glycothermal process were studied in aqueous suspension using ESA(Eletrokinetic Sonic Amplitude). The average particle size of the synthesized MnFe₂O₄was about 30±10nm. The dispersion and rheological behavior of MnFe₂O₄nanoparticles aqueous suspension was investigated using MnFe₂O₄as a disperse agent. The colloidal stability of nanosized MnFe₂O₄aqueous suspensions at different pH values has been investigated by means of zeta potential, sedimentation, average particle size and microstructure of green body. The isoelectric point of MnFe₂O₄powders is at pH around 5.5 and the value of zeta potential is at its maximum near pH 11.

내용기반 분류에 의한 비디오 검색 시스템 설계

배종식,남윤성,양동일,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

We suggest how to search news data by dividing structurely, by classifying meaningly, and by itemizing them by contents. The structural division divides the scene using correlative information between frames such as the distribution of the space brightness and the irregularity of brightness, and time relation etc. The meaning classification means to classify the detailed contents of news video as articles comparing special information extracted frame key frame with previous knowledge information. This study classifies the articles as the anchor's scene and the non-anchor's scene using the character that the progress of news is repeated centering around the anchor frames by periods. We get the non-anchor's scene to search the news data itemizing speech scene, interview scene and general scene, and classifying as articles. Also, we use the function of searching for summary by news icons and search the caption by processing the integration of caption, and design them to be able to search the news video quickly classifying news video as contents and indexing them.

일체형 촉매변환기의 비정상 열적 거동해석을 위한 수치해석 방법

배상수,강동진,임홍식 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2

A numerical procedure for the analysis of transient behavior of a monolithic catalytic converter is presented. The thermal behavior of a monolithic catalytic converter is fully coupled with mass transfer and exothermic reaction between exhaust gases and the catalytic converter. In the present study, all these processes are solved simultaneously. The heat transfer process is also simply modelled by using combinging one dimensional convention and conduction and the chemical reaction is also simply modelled by using the concepts of reaction rate and reaction heat. All the partial differential equations for the heat transfer, mass transfer and chemical reactions are approximated by using finite volume method. Resulting algebraic equations are solved using the Newton's method. To see the workability of present numerical method, two well known problems, step increase and step decrease in the gas inlet temperature, have been calculated. Present numerical method shows a good convergence behavior for two test cases : converged solution were obtained with 8 iteration (for tolerance of ??)at most through out the whole calculation domain of space and time. Comparison of present solutions with previous solutions shows a good agreement.

하악 시상골 절단술 후 고정 방법에 따른 회귀 성향에 대한 비교 연구

배진오,이동근,오승환,신기영,장관식 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2

Objective : To compare two different methods of rigid fixation in postoperative stability after mandibular setback, Material and Methods : 28 patients with Class III malocclusion were treated by bilateral sagittal split ramus osteotomy(BSSRO) and mandibular setback were selected for this study. Group A(n=14) had the bone segments fixed with monocortical miniplate on the lateral side of the mandibular body and Group B(n=14) had three noncompressive bicortical screw inserted at the genial area through a transcutaneous approach. Cephalograms were taken preoperatively, postoperatively within 1 weeks and at a follow-up period (mean 8.9 months after surgery) and the amount of setback and postoperative change were measured. Results : Postoperative relapse between two groups was minimal in setback of the mandible. Statistical analysis showed no significant difference in postoperative relapse. Conclusion : This study suggests that both methods of skeletal fixation investigated give comparable postoperative stability and their use in mandibular setback appears to be a fairly stable clinical procedure.

자동차 수동 트랜스미션 기어의 손상과정 예측

베효준,조연상,김동호,서영백,박흥식 동아대학교 생산기술연구소 2000 生産技術硏究所硏究論文集 Vol.5 No.2

The wear particles is released from the moving surfaces in gear systems of transmission and its morphology is directly related to the damage and failure to gear systems from which the particles originated. It is the effective method to diagnosis damage process of gear systems of automobile transmission to observe wear particle in gear oil. We tested with new transmission and took out gear oil according to drive distance. To be applied to damage diagnosis of gear system in transmission of automobile, 4 shape parameters of wear particles in gear oil were calculated and wear volume were presumed with the image processing system.

뇌졸중 환자에 관한 기술역학적 조사연구

송문식,이태용,이동배 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

Two hundreds and ninety-one cases of cerebrovascular accident patients, admitted at one general hospital, located at Taejeon city were studied descriptively for five years from January, 1984 to December, 1988. 1. Among the 291 cases, cerebral hemorrhage were 65.6%, subarachnoid hemorrhage were 16.2%, cerebral embolism were 10.0%, and cerebral thrombosis were 8.2%. 2. The sex ratio was 1:1.1(M:F), and the sixth decade was the most prevalent age group. The seasonal incidence was highest in spring, and winter, summer, and autumn were followings in the order. The time of onset of incidence was most prevalent between 13:00 and 22:00. 3. As for the associates at the onset of CVA, rest was 33.5%, and was work 23.8%. The most common symptoms were nausea, vomiting and headache. Patients admitted with recurrent attacks were 16.9%. The rate of patient with the past history of hypertension and cardiovascular disease were 53.3%. 4. The overall mortality of cerebrovascular accident was 13.0%, of CVA patient the mortality rates of subarachnoid hemorrhage were 23.0%, cerebral hemorrhage were 13.0%, cerebral thrombosis 8.0%, and cerebral embolism 3.0%, in that order. 5. Hypertension was found in 80.0% of total cases; the common findings of electrocaridography were normal and left ventricular hypertrophy; 82.1% of chest X-ray findings was normal: normal levels of S-cholesterol, s-triglyceride, s-glucose, urine protein, and urine glucose were 94.3%, 66.0%, 72.5% and 53.8% respectively.

Cl이 첨가된 ZnSe의 특성 연구

손정식,김인수,이동건,배인호,박성배 嶺南大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.16 No.-

The electrical and structural properties of Cl-doped ZnSe epilayers have been studied by Hall effect measurement, Photoluminescence(PL), and chemical etching. By using ZnCl₂ as dopant source, the high quality n-type ZnSe layers with electron concentrating up to ?? have been achieved. Hall mobility for an epilayer with ?? are ~ 400 ㎠/V.s at 300 K and ~ 900㎠ /V.s at 80 K. These values are close to those reported for the homoepitaxial layer. For heavily doped samples, Cl donors are partially compensated. The PL measurements were performed at 11 K and 300 K. The excitonic emission associated with a neutral donor is dominant in the samples doped with Cl concentration below ~??. The carrier compensation was discussed with ?? complex as reported origin of self-activated(SA) emission in previous reports. The micrographs of etched surface by Br-methanol dilute solution showed that the lattice defects were increased with doped Cl concentration.

의약정보담당자(MR)의 기능 및 역할에 관한 연구

이동일,제해관,윤석준,안형식,문영배 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.1

Background : Aim of this study is focused on the analysis of the needed abilities of medical representatives resulting in building up the market and increasing sales. It is to propose methods to increase this ability ensuring continuous growth in market share and profit. Methods : A survey was conducted between January 6 and May 31, 2003. Using SPSS(Version 10.0), the collected data was analyzed by Hotelling T2, factor analysis. Some hypotheses were selected to include the conclusion. Some questionnaires for physicians working in hospitals or clinics and the medical representatives working in a pharmaceutical company were created and asked to them to either prove or reject those hypotheses. The results were analyzed to find the primary factors that effect the interactions between physician and the medical representatives. These factors were also studied along with the theoretical research based on published references. Results : The results were as follows. The main reasons for the physician to meet with a medical representatives were collection of product informations needed for patient treatment and collection of informations on current medical issue and as well as personal interests. The main parameters by which physicians evaluate the medical representatives are human relationship including sincerity and manners and supply of accurate and unbiased information on products. Overall, the medical representatives’ perception on the importance of medical knowledge and ability to deliver it are lower than that expected by physicians. Conclusion : Medical and pharmaceutical companies’ environment are changed rapidly. And those changes forced medical representatives to set new roles and competency. In order to drive away from the past ‘rule of thumb’ and ‘adaptation to circumstance’, optimal method and systemic development to train and support the medical representatives should be quipped. They will help ,medical representatives to be specialists in medical knowledge and to understand the exact need of health care professions. Product competitiveness will be increased and eventually successful business can be achieved through it.

골절의 치유과정에서 전혈중의 Ca - Mg, Zn - Cu의 농도 변화에 관한 연구

박가식,이동배,이태용,조영채 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.1

In order to investigate the hypothetic defense mechanism of essential metals which take part in the healing process of bone fracture, the author measured the changes of whole blood concentration of Ca, Mg, Zn and Cu from 88 fractured patients as experimental group, and 49 healthy, male medical students as control group, using Inductively Coupled Plasma Emission Spectrometer. The obtained results were as follows. 1. The mean concentrations of Ca at the time of fracture, at 1 month after fracture and at 3 months after fracture were 52.55± 17.37 g/ml, 60.45± 14.37 g/ml and 65.33± 16.73 g/ml, respectively and increased significantly through the healing process of bone fracture(p<0.05). The Ca concentration of fracture group at 3 months was higher than that of control. 2. The mean concentrations of Mg at the time of fracture, at 1 month and at 3 months were 26.50± 6.76 g/ml, 28.46± 6.11 g/me, 29.51± 4.32 g/ml, respectively and increased significantly through the healing process(p<0.05). The concentrations of Mg in fracture group were lower than that of control(p<0.05). 3. The mean concentrations of Zn at the time of fracture, at 1 month and at 3 months were 6.73± 1.68 g/ml, 6.48± 1.25 g/ml, 6.91± 1.58 g/ml, respectively and the changing tendencies were not statistically significant through the healing process (p>0.05). The concentrations of Zn in fracture group were lower than that of control. 4. The mean concentrations of Cu at the time of fracture, at 1 month and at 3 months were 1.04± 0.38 g/ml, 1.11± 0.46 g/ml, 1.13± 0.42 g/ml, respectively and increased through the healing process, but the changes were not statistically significant (p>0.05). The concentrations of Cu in fracture group were higher than that of control(p<0.05). 5. There were positive correlations between Ca and Mg, Zn and Cu concentrations (p<0.01) in both fracture and control groups, but no constant correlations were found in the other metals. 6. The ratio of Mg/Ca was tend to decrease through the healing process of bone fracture, but the ratio of Zn/Cu was showed no constant change in fracture group and that was higher in control(p<0.05) 7. As above results, the changes of 4 essential metal( Ca, Mg, Zn, Cu) concentrations in whole blood have meaningful role in the healing process of bone fracture.

참여적 작업관행과 조직성과

김동배,김강식 한국항공대학교 경영연구소 2000 경영연구 Vol.7 No.1

본 연구는 우리나라 276개 제조업의 공장을 대상으로 개별 참여적 작업관행이 조직성과에 미치는 영향을 분석하였다. 참여적 작업관행이 조직성과에 미치는 영향은 대부분 작업관행들의 시스템효과를 연구하였지만, 이에 대한 연구가 부족한 우리 나라의 경우 개별 관행들이 성과에 미치는 영향을 분석할 필요가 있다. 분석 결과 외국의 연구들에서 조직성과를 높이는 것으로 알려진 일부 참여적 작업관행들은 우리나라의 경우에도 조직성과를 높이는 것으로 나타났지만, 고용보장, 능력급, 과업통합 등 다른 관행들은 조직성과를 높이지 않는 것으로 나타났다. 본 연구의 결과는 참여적 작업관행의 효과가 국가별 상황에 따라서 달라질수 있다는 것을 시사한다. This study examines the effects of high-involvement work practices on firm performance. Data were collected by mailed questionnaire and 276 plants of manufacturing firms returned usable answers. Most of studies on the effects of high-involvement work practices on firm performance is about the system effect of work practices. However, it is needed to analyze the effect of individual work practice on firm performance in Korea where this type of study is rare. In result, it is proved that some elements of high-involvement work practices, which are known as increasing the firm performance based on the studies done in other countries, also increase the firm performance in Korea. However, it is proved that some elements of high-involvement work practices such as job security, pay for skill, task integration, etc. do not increase the firm performance. The result of this study is that the effect of high-involvement work practices could be different depending on the context of each country.