검색 엔진을 이용한 검색 서비스 설계 및 구현

전병태,김병철,이명선 高麗大學校附設 컴퓨터科學技術硏究所 1999 JOURNAL OF COMPUTER SCIENCE & ENGINEERING TECHNOLO Vol.2 No.-

최근 급격한 인터넷의 발전은 검색 서비스로 인해 주도되었다고 해도 과언이 아닐 것이다. 방대한 정보의 바다 인터넷을 통해 정보를 얻으려 해본 적이 있다면 어떤 검색엔진을 사용하여야 할지 어떤 검색어를 사용하여야 할지 한 번쯤은 고민 해 보았을 것이다. 이러한 이유로 많은 사람들이 메타 검색엔진이라는 것을 이용하게 된다. 그러나 이러한 메타 검색엔진도 자체내의 여러 가지 정보 처리로 인한 느린 결과 처리의 문제점이 있다. 본 논문에서는 인터넷의 정보검색을 하는 사용자의 특성을 고려한 정보 검색 서비스를 제공해 주는 시스템을 설계 구현하여 본다. It is needless to say that information search service leads explosive growth Internet. When you have a experience to get information what you search in Internet, puzzled about what kind of search engine and search keyword should select. Thus many people want to use Meta-search engine. But Meta-search engine has some problem. one of problem is that meta-search engine manages information which is obtained by several search engine. Thus meta-search engine has some severe performance degradation. In this paper we designed and implemented information search service system for the purpose of using internet to get information search result.

수소 자기 공명 분광 영상으로 확인된 후두엽성 중첩성 복합 부분 간질에 의한 뇌신경 세포의 손상

서범천,김옥준,김현숙,최철희,김서현,이병인 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

직장 건강증진사업 : Issues and Strategies 논점과 전략

천병철 서울大學校 保健大學院 1997 國民保健硏究所硏究論叢 Vol.7 No.2

Since the publication of the Lalonde Report in 1974, the concept of health promotion have been introduced into many health-related fields. In this report, he emphasized the self-imposed risls and environment as the determinants of major 5 diseases, and the change of the helath behavoir and environment would reduce the premature mortality from diseases. Health promotion programs have been developed within 3 main groups- schools, worksite, commuities - in USA. The employed persons are those at greatet risk for premature morbidity and mortality, those who occupies about 1/4 of whole population and those who makes social productivity. It is optimal to apply health promotion progam to worksite, because it is effective, easily accessible and even beneficial to both the employees and the employers. The examples of typical worksite health promotion programs are smoking cessation, hypertention control, nutrition, weight control, stress management, exercise and fitness and other assitance programs concernig alcohol, drugs and accident prevention. In other aspecs, these programs are too much individualized, not concordant with pre-existing occupational health system, restricted participation of the employees and lack of carefully performed cost-benefit analysis. In Korea, the problesm of worksite health promotion is more comples. The major proportion of the workers sork for small or very small worksites, and many of them for service industries. Less than half of the company have the worksite health manager. There are insufficient survey for the health needs of employees and emplyers, and many other problems- discordant with pre-existing system, lack of evoluations etc. It is need to concrete firm base to establish suitable worksite health promotion programs before imitating other contries's programs.

작은 피질하 병변에 대한 정위적 개두술 및 경-구 접근법

손병철,김문찬,이관성,박춘근,홍용길,강준기 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.12

자궁내막증의 임상적 고찰

강길전,유병대,원철,이기환 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Objective : Between 1991 and 1993 data were collected to evaluate risk factors for endometriosis. Design : A case-control study was conducted on 54 cases with laparotomically confirmed pelvic endometriosis consecutively admitted to CNUH. The control group consisted of 60 women admitted to hospital for benigh gynecologic disease. Results : No relation emerged with marital status, age at marriage, marital life, level of education, socio-economic status, age at menarche, menstrual regularity, number of spontaneous abortion, duration after last delivery, height and weight. But compared to control group, longer menstrual period, larger menstrual amount, severe menstrual pain, less number of parity, and less number of induced abortion signifcantly increased risk of endometriosis Conclusions : This study showed that frequent menstrual cycles and long period of menstruation with frequent and large amount of retrograde menstrual flow increased the risk of endometriosis.

전기로 분진에서 납의 휘발반응에 대한 속도론적 연구

김병수,유재민,이재천,남철우,윤정모 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.4

"he removal of lead from electric arc furnace (EAF) dust is important in the process for recovering zinc by a reduction-volatilization method. In this study, experiments on kinetics of the volatilization reaction of lead by chlorine components as NaCl and KCl contained in the EAF dust were carried out in the temperature range of 973 to 1223 K under an air atmosphere using a weight-loss technique. As a result, the volatilization ratio of lead was about 99.0% at the temperature of 1223 K and the reaction time of 180 min. Jander equation was found to fit well the volatilization reaction rate over the entire temperature range. The volatilization reaction of lead is rate controlled by solid-solid diffusion. An activation energy of 175 kJ/mol(41.8 kcal/mol) was obtained. (Received January 8, 2004)

반건식-백필터에 의한 소각배가스 중의 HCI, SOx 제거 (Ⅰ)

배병훈,신남철,고경숙,김춘희,문종익,임경택 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

This study has been carried out to investigate the removal efficiencies of HCl/SOx in a Spray-Dryer/Fabric-Filter system. In HCl/SOx removal, we could identify the key factors such as spray dryer outlet temperature, molar equivalence ratio(MER) and fabric filter velocity, but we couldn't find out the correlation of HCl and SOx. The removals of HCl/SOx were inversely proportional to spray dryer outlet temperature(l30~170℃) and filter velocity(l.0~1.5 m/min), at the MER, HCl removal efficiency was strongly proportional to MER, but SOx, removal efficiency was not particularly increased by MER over 1.5. The removal efficiencies of HCl/SOx were improved over 10% at the fabric filter. In this Spray-Dryer/Fabric-Filter system, HCl/SOx removal efficiencies were about 99%, 96% respectively.

백서 하악골의 기능적 전방위가 악관절 원판에 미치는 영향

배용철,경희문,장병천,성재현 대한치과교정학회 1994 대한치과교정학회지 Vol.24 No.4

This study was conducted to examine the changes in the shape of the Sprague-Dawley rats' articular disk following postural hyperpropulsion by observing their articular specimens through light and electronic microscopes after following 2-week and 4-week postural hyperpropulsion from their four weeks of age. The findings of this study are summarized as follow. It was shown that as compared with the control group, the experimental group indicated a significant increase in thickness of the 2-week groups' anterior and posterior portion of the articular disc. The experimental group showed statistically more significant increase in thickness of the 4-week groups' anterior portion of the articular disc than the control group. Light micrograph showed that the experimental group had more fibroblast in the anterior portion of the 2-week and 4-week groups than the comparing group. The 2-week groups showed in the findings through the electronic microscope that there were found the well developed and dilated RER which see-ms to actively synthesize the extracellular matrix including collagen, the cells with the well developed RER without distention which seems to actively synthesize the intracellular microfilaments due to the well developed free ribosome, and the typical chondroid cells. In addition, there was more fibroblast cell with the distended and well developed RER in the anterior area of the experimental group than that of the control group while fibroblast with the well developed RER and free ribosome was quite abundat. Based on the above result of this study, it was shown that the functional hyperpropulsion of the mandible causes the changes in the nature of the mechanical load to the certain portion of the articular disk. As a result, it seems that there may be occurred some changes in morphology of the disc by adaptation or confrontation with these changes at the cellular level.

내측회장동맥에 의해 형성된 척수경막동정맥루로 인한 척수병증 1예

이일형,배재천,이상무,김진혁,권기한,이병철 대한신경과학회 1999 대한신경과학회지 Vol.17 No.3

발치 직후 시행된 즉시 임플란트 식립술에 관한 임상적 평가

양은영,천상득,노재환,이승은,송재철,진병로 영남대학교 의과대학 2003 Yeungnam University Journal of Medicine Vol.20 No.1

Background: Immediate implant placement has become an acceptable treatment for the edentulous area. The advantages of the immediate implant placement include considerable decrease in time from tooth extraction to placement of the finial prosthesis, fewer surgical procedures, and better acceptance of the overall treatment plans. But the success is dependent on the quantity and quality of the extraction socket. The purpose of this study is to evaluate the success of the immediate implant placement. Materials and Methods: Twenty-one sites in 16 patients were selected for the evaluation of the immediate implant placement. All of the cases were followed using clinical and radiographic examinations. Criteria of success were the absence of peri-implant radiolucency, mobility, and persistent pain or sign of infection. Results: Of the 21 implants, 13 implants have been succeeded. Of the 13 implants, 10 implants were replaced for the periodontal disease and 3 implants were replaced for the trauma. Conclusion: The criteria of the success in immediate implant placement are as follows. 1) Implants placed into fresh extraction sockets have a high rate of survival. 2) Implant should be placed as close as possible to the alveolar crest. 3) Implant placed into available bone beyond the apex have a high success rate.