外科領域에서의 Cefmetazon(C.M Z., CS-1170)의 臨床的 效果

徐允錫,李燦泳 최신의학사 1983 最新醫學 Vol.26 No.2

Potential Biomarkers for Diagnosis of Overactive Bladder Patients: Urinary Nerve Growth Factor, Prostaglandin E2, and Adenosine Triphosphate

서윤석,고광진,김태헌,이효석,성현환,조원진,이문재,이규성 대한배뇨장애요실금학회 2017 International Neurourology Journal Vol.21 No.3

Purpose: This study aimed to investigate potential biomarkers for the diagnosis of overactive bladder (OAB). Methods: A total of 219 subjects were enrolled and divided into 2 groups: OAB subjects (n=189) and controls without OAB symptoms (n=30). Three-day voiding diaries and questionnaires were collected, and urinary levels of nerve growth factor (NGF), prostaglandin E2, and adenosine triphosphate were measured and normalized to urine creatinine (Cr). Baseline characteristics and urinary levels of markers were analyzed. A receiver-operator characteristic (ROC) curve was used to analyze the diagnostic performance of urinary markers. Urinary levels of markers according to subgroup and pathogenesis of OAB were evaluated. Correlation analyses were used to analyze the relationship between urinary levels of markers and voiding diary parameters and questionnaires. Results: There was no difference between the 2 groups with regards to age, sex ratio, or urine Cr (P>0.05). The urinary levels of NGF/Cr were higher in OAB subjects than in controls (P<0.001). Urinary NGF/Cr was a sensitive biomarker for discriminating OAB patients (area under the curve=0.741; 95% confidence interval, 0.62–0.79; P=0.001) in the ROC curve. The urinary levels of NGF/Cr were significantly higher in OAB subjects than in controls regardless of subgroup or pathogenesis. Correlation analysis demonstrated urinary urgency was significantly related to urinary NGF/Cr level (correlation coefficient, 0.156). Limitations include a relatively wide variation of urinary markers. Conclusions: Urinary NGF is a potential biomarker that could serve as a basis for adjunct diagnosis of OAB.

劉? 思想 硏究

서윤석 한국중국어문학회 1997 中國文學 Vol.27 No.-

실시간 공간 데이터베이스 시스템을 위한 질의 최적화 기법

서윤석 김천과학대학 2003 김천과학대학 논문집 Vol.29 No.-

Real-time spatial database application systems require that spatial data have to be updated within valid time and user queries should be processed in real-time. In these systems, it needs to be considered a processing about real-time spatial data and real-time spatial query they are not considered in a conventional spatial database application systems. Real-time spatial queries in real-time spatial database application systems are hard to be processed successfully, because spatial operation takes major time in total processing and its real-time spatial data are easy to miss their validity. Therefore, it is required a query processing technique that makes queries meet time constraints of real-time spatial query with keeping validity of real-time spatial data. real-time operation post-placing technique is proposed in order to meet time constraints of real-time data and queries in real-time spatial query processing with managing real-tome spatial data and considering that manages real-time spatial data used in real-time spatial query.

친환경농업에 대한 올바른 이해

서윤석 한국토양비료학회 2005 토양과비료 Vol.22 No.-

공간 객체의 효율적 중복영역 제거기법

서윤석 김천과학대학 2002 김천과학대학 논문집 Vol.28 No.-

클라이언트-서버 환경의 공간 데이터베이스 시스템은 방대한 양의 공간 데이터 전송에 따르는 네트워크 부하가 발생한다. 이러한 환경에서 화면 이동, 확대 및 축소 등의 유사한 영역의 데이터를 요구하는 질의는 매우 빈번하게 발생하며, 이미 전송된 영역과 중복되는 영역의 데이터를 재전송하여 네트워크부하를 가중시킨다. 이러한 문제는 생성된 질의 결과 중 클라이언트에 이미 전송된 데이터들을 제거함으로써 해결이 가능하다. 본 논문에서는 클라이언트-서버 공간데이터베이스 시스템에서 영역 요구 질의의 효율적인 처리 방법을 제안하고, 이를 기반으로 동일한 데이터의 중복 전송을 제거하기 위한 공간객체관리자를 설계하고 구현한다. Spatial Database systems in client-server environment have network overhead caused by transmission of a large amount of spatial data. In this environment, queries such as screen movement, enlargement, or shrinkage which request data in similar region are frequently occurred, and they increase network overhead by re-transmission the same data in duplicate region with earlier transmitted region. Removing transmitted data from query results can solve this problem. In this paper, we propose an efficient method for region request query in client-server spatial database systems, and design and implement a spatial object manager for removing re-transmission of the same data.

우리나라 16개 시·도의 제조업부문 총요소 에너지 효율성 및 결정요인 분석

서윤석,박창수 한국지역학회 2017 지역연구 Vol.33 No.1

This paper analyzed 16 regional total factor energy efficiency (TFEE) of the Korean manufacturing sector using data envelopment analysis method for the period of 2005-2013. According to the empirical results, it is necessary to use TFEE as well as partial energy efficiency defined by the ratio of energy usage to output (energy intensity) when we compare energy efficiency. Secondly, TFEE in the Korean manufacturing sector is quite different across 16 regions. For example, Gangwon province should improve energy efficiency by 55% compared to Seoul, Gwangju, Ulsan, and Gyeongbuk which are located on production frontier. Furthermore, the estimation of panel tobit regression model showed that the higher non fossil fuel using, the higher production share of large-sized firms, the lower energy intensity, and the lower capital-labor ratio could have positive effect on TFEE. 본 논문은 에너지 효율성 지표로써 투입물로 에너지뿐만 아니라 노동과 자본 등을 동시에 고려한 총요소 에너지 효율성을 DEA에 기초하여 2005-2013년 기간 동안 우리나라 16개 시·도의 제조업 부문에 대하여 추정하였다. 추정결과에 의하면, 단일요소 에너지 효율성과 총요소 에너지 효율성 간에 차이가 존재하여 두 지표를 서로 보완적으로 사용할 필요성이 있는 것으로 나타났다. 한편, 총요소 에너지 효율성 지표는 대부분의 시·도들 에서 높게 나타났는데 서울, 광주, 울산, 경북 등은 프런티어에 위치하지만, 강원, 부산, 대구, 인천 등은 상대적 으로 매우 비효율적인 것으로 나타났다. 또한 패널 토빗 모형을 통해 총요소 에너지 효율성의 결정 요인을 추정한 결과에 의하면, 대기업의 생산액 비중이 클수록, 에너지 다소비업종의 생산액 비중이 작을수록, 그리고 전력 사용 비중이 클수록, 총요소 에너지 효율성에 긍정적인 영향을 주는 것으로 추정되었다.

원자력 발전소의 전기설계 동향

서윤석 대한전기학회 1990 전기의 세계 Vol.39 No.2

노인에서 나트륨 섭취 감량을 위한 식이 자아효능감과 질병에 대한 신념, 식행동의 이점 인지, 장애 인지 간의 관련성

서윤석,석윤희,정영진 한국영양학회 2012 Journal of Nutrition and Health Vol.45 No.4

The purpose of this study was to examine the relationship of dietary self-efficacy and illness beliefs, perceived bene-fits, and perceived barriers for the reduction of sodium intake in the elderly. A cross-sectional study was performed on 252 elderly people, aged 65 yrs and above, living in Daejeon Metropolitan city and Jecheon city, Chungbuk from March 21 to March 30, 2011. Dietary self-efficacy of three factors (resisting relapse, reducing salt and behavioral skills), perceived benefits and barriers, accurate and inaccurate illness beliefs were measured by 5 or 4 point Likert scale. With the increasing education level of the elderly, dietary self-efficacy, and accurate illness belief score increased and perceived barrier score decreased. Perceived benefits score was higher in the subject living alone compared to those living with siblings or spouses. Among three factors of dietary self-efficacy, reducing salt was scored highest and behavioral skills scored lowest in the elderly. Recording meal diary and reading labels for salt content in the items of behavioral skills showed lower score than other items. Accurate illness beliefs and perceived benefits were more scored than inaccurate illness beliefs and perceived barriers respectively in the subjects. The subjects with higher accurate illness beliefs, lower inaccurate illness beliefs, higher perceived benefits, and lower perceived barriers for the reduction of sodium intake showed higher dietary self-efficacy. In summary, accurate illness beliefs and perceived benefits positively correlated with dietary self-efficacy for the reduction of sodium intake in the elderly, whereas inaccurate illness beliefs and perceived barriers are negatively correlated.

다사업자 환경에서의 공정경쟁기반 : 접속료와 정보공개

서윤석 한국통신학회 1995 정보와 통신 Vol.12 No.11