증발 표면적 증대를 위한 수적 분리기 특성에 관한 연구

모종근,공태우,이광영,정효민,정한식,서정세 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-

The purpose of this research is to obtain the characteristics of water-vapor separator for improving the evaporative surface. The experimental system is constituted with water vapor generator, vapor storage tank, laser source for visualization and camera for photography. The efficiency of water-vapor separator can be varied by the kinds of the inside materials. Thus, in this report, we introduced the three kinds of materials with wire scrap, wire brush and sponge. As the experimental results, the wire brush was showed the best efficiency with 185 g/hr.

협력적 필터링 기법을 이용한 P2P 모바일 에이전트 기반 서비스 처리 모델

윤효근,이상용 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-

Context-awareness is an important element that can provide service of good quality according to user's surrounding environment and status in ubiquitous computing environment. Information gathering tools for context-awareness use small size mobile devices which has a mobile agent. Now, a mobile agent is consuming much times and expense to collect and recognize each user's context information. Therefore, needs research about model to reduce mobile agent's load and to recognize user's context information in rapid time. This paper proposes a P2P mobile agent model that mixes filtering technique and a P2P agent in mobile agent. The proposed model analyzes each user's context information in uniformity area and makes groups with similar preference degree. This model continuously observes and learn users' action and service, and measure new interrelation.

바이오인포메틱스에 기반을 둔 웹 페이지 분석 도구

윤효근,이상용 공주대학교 생산기술연구소 2001 論文集 Vol.9 No.-

This paper proposes a new webpage analysis tool based on bioinformatics. The tool puts web pages into single chromosome and expresses each character and image in the pages by gene, DNA. It analyzes similarity of gene by PCR during the process. Similarity of web page is calculated using fitness Function of gene algorithm.

비소세포폐암에서 동시화학방사선요법을 받는 중 생긴 기관폐루1례

강건희,조성우,김성록,유영진,이효락 인제대학교 2008 仁濟醫學 Vol.29 No.-

최근 근치적 절제가 불가능한 국소진행성 비소세포 폐암에서 화학요법을 방사선요법과 동시에 투여하는 치료방법에 대한 연구가 활발이 이루어지고 있으며 이러한 치료과정 중 생긴 여러 부작용에 대한 연구도 이루어지고 있지만 아직까지 기관폐루가 생겼다고 보고는 없다. 따라서 치료과정 중 기관폐루가 의심되는 소견이 있을 경우 이에 대한 조기 진단과 치료를 통하여 부작용에 따른 사망률을 최소화하여야 하겠다. The incidence of lung cancer is increasing steadily and various methods have been attempted to enhance the cure rate of locally advanced non small cell lung cancer, which is hardly removable surgically, but the results are not satisfactory yet. Recently, research is being made actively on the simultaneous application of chemotherapy and radiotherapy for locally advanced non small cell lung cancer that cannot be radically resected and the we experienced a case of patient diagnosed with bronchopulmonary fistula during the treatment process, and therefore report it here.

면내 지진파에 대한 부지응답해석

김효건,최홍석,손영호,최광규 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

The site responses of seismic waves were considered when in-plane P and SV waves are incident to alluvial deposit of arbitrary shape. Parametric variables such as the incident angle and the dimensionless frequency and the sheat wave velocity ratio and the mass density ratio between the half-space and the allvial deposit were selected. For numerical analysis, the inhomogeneous alluvial deposit was modeled by using 8-node isoparametric finite elements and the surrounding homogeneous linear elastic soil half-space was modeled by using 3-node isoparametric boundary elements. The two elements at the interface were coupled together with the equilibrium condition of the tractions and the compatibility condition of the displacements.

가로쓰기 한글의 글자꼴과 글줄이 인지속도에 미치는 영향

이병근,이진호,심효섭 東西大學校 1997 동서논문집 Vol.3 No.1

This study investigated the effect of character form and the Numbers of characters per line on Readability of Hangul characters and words horizontal printing. The results were as follows. In canceling tests. (1) the speeds of character canceling were faster in the order of elongated form condensed form and original form conditions, and (2) the speeds of word canceling were in the order of elongated, original and condensed form conditions. But in a reading task, (3) the order of the Readability were [40>35>30] in number of characters per line condition and [original>elongated>condensed] in character form conditions. The above indicates that original form with 40 characters per line is the best combination for horzontal Haugul printing.

국내 대학병원에서 정주용 Ciprofloxacin 사용의 적정성 평가

김신우,박효정,오원섭,김연숙,장현하,정숙인,정두련,이혁,염준섭,기현균,손준성,백경란,우건조,송재훈 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

목적 : 국내 병원에서의 정주 ciprofloxacin 사용의 적정성을 평가하고자 하였다. 재료 및 방법 : 2003년 9월 25일부터 8개의 대학병원에서 정주 ciprofloxacin을 받았던 290명의 연속적으로 모집한 성인환자를 대상으로 약제사용 평가(DUE)를 전향적으로 수행하였다. 이 연구에 사용된 DUE 기준은 미국병원약사회의 기준을 국내 실정에 맡게 수정하여 사용하였으며 1) 사용의 정당성에 관한 항목, 2) 사용 시 준수되거나 시행되어야 할 사항에 대한 항목, 3) 부작용에 대한 항목, 4) 치료 효과에 대한 항목으로 나누어 조사하였다. 결과 : 환자의 평균 나이는 54세였다. 33예(26.9%)에서만 약제 사용의 적정성 측면에서 기준을 만족하였고 91예(73.1%)에서는 사용이 적절하지 않았다. 정주 cipro-floxacin의 부적절한 사용의 흔한 원인은 수술 전후의 예방약 사용, 비뇨기계 처치 전의 예방적 사용, 열성 질환에 대한 경험적 사용 등의 순이었다. 사용 시 준수사항 의 측면에서는 사용 전 배양검사(73.8%)와 사용 중 배양검사(68.6%)가 낮은 수행 정도를 보였으나 그 외는 비교적 높은 적정성(82.4-100%)을 보여주었다. 정주 ciprofloxacin사용의 합병증은 드물었다. 치료 효과의 면에서 치료반응은 93.3%였다. 결론 : 약제 사용의 정당성 기준에 따른 정주 cipro-floxacin의 부적절한 사용은 연구에 포함된 대학병원에서 매우 흔하였다(73.1%). 그러므로 적절한 항생제 사용에 대한 교육과 제도적 장치가 매우 필요한 것으로 판단되었다. Background : To evaluate the appropriateness of intravenous (IV) ciprofloxacin usage in university hospitals in Korea. Materials and Methods : We prospectively evaluated the appropriateness of drug usage in 290 consecutive adult patients who received IV ciprofloxacin in eight teaching hospitals during the period from September 25, 2003 to November 15, 2003. Drug use evaluation (DUE) in this study was based on the modified standard by the American Society of Hospital Pharmacy with regard to the justification of drug use, critical and process indications, complications, and outcome measures. Results : Average age of the patients was 54 years. The use of IV ciprofloxacin was appropriate only in 33 cases (26.9%). Common reasons for inappropriate use of IV ciprofloxacin include perioperative uses or prophylactic injection before urologic procedures, and empirical therapy for febrile episodes. Most of the "critical indications" and "process indications" showed high rate of appropriateness (82.4-100%). However, the rate of taking culture and sensitivity test before (73.8%) and during ciprofloxacin use (68.6%) were low. Complications with ciprofloxacin use were rare. In 93.3% of cases, ciprofloxacin treatment was clinically effective. Conclusion : Use of intravenous ciprofloxacin is frequently inappropriate in tertiary care hospitals in Korea. Implementation of education program and antibiotic control system is critical in improving the appropriateness of antimicrobial use.

W(110) 표면에 CO와 O_2의 공동흡착

이경희,한현석,윤효근,부진효,이순보,곽현태 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-

The coadsorption of CO and O₂ on W(110) surface was studied by LEED, TDS, and photoelectron spectroscopy. In the TDS for the coadsorption of CO at RT on O₂ precovered W(110) surface, two CO desorption states were observed at about 400 and 1150 K, called α and β , respectively. The β-CO spectra with second order desorption kinetics were shifted to lower desorption temperature as increasing the amount of preadsorbed atomic oxygen on the W(110). Moreover, the β-CO spectra were gradually increased with increasing the amount of preadsorbed oxygen to 0.5 ML. Even though a (2 x 1) LEED pattern appeared during oxygen adsorption at RT and 1-3 L oxygen exposures, we didn't observe any new pattern induced by CO in this study. Only the structure of c(11 x 5) was obtained at temperature in the range of 800-1100 K. These results indicated that there were interaction between CO and O and thereby the β-CO might riot be dissociated even at the higher temperature than 800 K. By using the XPS and UPS, it was also confirmed that the coadsorbed β-CO at 900 K doesn't dissociate as the experimental results of the adsorption of pure CO on W(110) surface at the same temperature. According to the valence band spectra, two CO peaks at near -10.7 eV (4σ) and -7.0 eV (5σ+1π) were observed, indicating molecular CO adsorption on the oxygen preadsorbed surface at RT. Even heating the coadsorbed surface to 900 K, we could also detect the CO 4σ peak which can be an important factor for identifying a contribution of the CO 4σ molecular orbital to the CO-metal bond. To our best knowledge, this is the first report and quite contradictory result to that reported previously.

미세혈관 협심증 환자의 임상상 및 지표에 관한 연구

박상호,온영근,김현정,이태훈,길효욱,김현건,박수진,송해정,한대희,방덕원,신원용,이내희,김성구,권영주 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1

Background : Microvascular angina or syndrom X is heterogenous and encompasses different pathogenetic entities. Several studies suggest that microvascular angina have good prognosis and occurs predominantly in postmenopausal women. Lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and fibrinogen are the independent risk factor of acute coronary syndrome and are the chief underlying cause of atherosclerosis. We investigated clinical characteristics and markers in patients with microvascular angina. Methods : We studies 23 patients diagnosed with microvascular angina and 16 control group with negative treadmill exercise test and no significant coronary angiogram. We investigated clinical characteristics in patients group and evaluated symptom during a follow-up period of 4.2± 2.5 month. Exercise time in treadmill exercise test was compared between patients and control group. We assessed the level of markers, such as lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, CRP and ESR in two groups. Results : There is no difference in age between two groups. Patients group had a tendency to increase in female, hypertension, DM, and smoking history, but there was no statistical significance difference. Exercise duration time was significantly decreased in patients with microvascular angina (p<0,05). Serum lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholestrol, Triglyceride, ESR, Fibrinogen and Homocystein value were no significant difference between microvascular angina and control group. Only CRP was significantly high in patients with microvascular angina (p<0.05). Conclusion : There was no statistical significance difference in age, sex, hypertension, DM and smoking history between two groups but patients group had a tendency to increase the prevalence in hypertension, DM and smoking history, female. Also, Symptom improvement and disappearance in follow-up was presented in 11 patients of 19(57.9%). Exercise tolerance was worse in patients group than control group. CRP value was significantly higher in patients group than control group. There was no statistical significance difference in lipoprotein (a), total cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, homocystein, ESR and Fibrinogen between two groups.

3D 온라인 슈팅 게임 개발 : "3D 포트리스"

金敬植,崔勝寬,寓昔珍,申一卿,朴勝浩,李東熙,李東建,張孝善 호서대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.19 No.-

In this paper, features and efficiencies of the 3D engine are described which has been developed through the research of 3D real time rendering techniques. And an on-line shooting game "3D Fortress" which has been developed using this 3D engine with server technologies is introduced for the techniques and methodology applied in the process of development of the game as well as the features and discussions of its implementation.