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신동구 ( Shin Dong-gu ),정재운 ( Jeong Jae-woon ),김성수 ( Kim Sung-soo ),이정배 ( Lee Jeong-bae ),박광필 ( Park Kwang-pil ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This study deals with the bond strength between the repair material and the substrate according to bonding method and curing condition. From the test results, 28 aged specimens appling none, Acrylic bonding agents and the bonding pin shows high bonding strength in Bonding Pin) None) Acrylic bonding agents order in the standard condition but in Bonding Pin) Acrylic bonding agents 〉 none order in the wet condition, each bond strength of 224 aged specimens appeared highly in Bonding Pin) None) Acrylic bonding agents order in the standard condition and wet condition.
신동구(Shin, Dong-Gu),권우택(Kwon, Woo-Teck),김병익(Kim, Byun-Ik),김수룡(Kim, Soo-Ryong),하상욱(Ha, Sang-Wook) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
Recently the generation of industrial byproducts has been increased by increase of consumption of electric power. One of the significant byproducts need huge amount of re-utilization is known as bottom ash and many studies to find out appropriate application have been performed and reported. In this work, the physical properties of bottom ash generated from power plant are analyzed. Characteristic mortar property for building material were investigated with content of added bottom ash and various lightweight aggregates. According to the analytic result of 22.5% of bottom ash with 5% of Expan cel, chemical compositions of bottom ash is similar to those of fly ash and compressive strength after 7days related to pozzolanic activity shows 19.6N/cm2.
신동구(Shin, Dong-Gu),정재운(Jeong, Jae-Woon,),김성수(Sung-Soo),이정배(Lee, Jeong-Bae),박광필(Park, Kwang-Pil) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
This study deals with the bond strength between the repair material and the substrate according to bonding method and curing condition. From the test results, 28 aged specimens appling none, Acrylic bonding agents and the bonding pin shows high bonding strength in Bonding Pin〉None〉Acrylic bonding agents order in the standard condition but in Bonding Pin〉Acrylic bonding agents 〉none order in the wet condition. each bond strength of 224 aged specimens appeared highly in Bonding Pin〉None〉Acrylic bonding agents order in the standard condition and wet condition.
신동구 ( Shin Dong-gu ),권우택 ( Kwon Woo-teck ),김병익 ( Kim Byun-ik ),김수룡 ( Kim Soo-ryong ),하상욱 ( Ha Sang-wook ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
Recently the generation of industrial byproducts has been increased by increase of consumption of electric power. One of the significant byproducts need huge amount of re-utilization is known as bottom ash and many studies to find out appropriate application have been performed and reported. In this work, the physical properties of bottom ash generated from power plant are analyzed. Characteristic mortar property for building material were investigated with content of added bottom ash and various lightweight aggregates. According to the analytic result of 22.5% of bottom ash with 5% of Expan cel, chemical compositions of bottom ash is similar to those of fly ash and compressive strength after 7days related to pozzolanic activity shows 19.6N/cm2.
국가과학기술종합정보시스템 구축을 위한 정보기술아키텍처(ITA) 수립 사례 연구
신동구(Shin Dong-Gu),신수미(Shin Su-Mi) 한국콘텐츠학회 2006 한국콘텐츠학회 종합학술대회 논문집 Vol.4 No.2
국가R&D의 투자 효율을 제고할 수 있는 시스템에 대한 요구에 따라 한국과학기술정보연구원(KISTI)의 주관으로 구축 중인 국가과학기술종합정보시스템(NTIS)은 정보화 전략의 일관성 확보와 정보화 투자의 효율성 확대를 위하여 ITA를 수립하여 활용하고 있다. 본 연구에서는 여러 국가연구개발사업 관리 기관을 연계하는 NTIS 구축을 위한 NTIS ITA의 정립절차와 수립된 ITA를 소개하고 ITA 수립의 시사점과 기대효과를 알아본다. The need for a system to promote the effectiveness of national R&D investment has become an important issue. Korea Institute of Science and Technology Information(KISTI) is developing National Science and Technology Information System(NTIS) to meet this need. For the consistency of IT strategy and to promote more effective IT investment the NTIS have been established Information Technology Architecture(ITA). NTIS is the system for coordination outcomes of each R&D centers. This case study's contents are the process of NTIS ITA establishment, the major contents and the effectiveness of NTIS ITA.
안성남,신동구,김상인,추호성,김문일,박익모,임한조,An Sung-Nam,Shin Dong-Gu,Kim Sang-ln,Choo Ho-Sung,Kim Moon-Il,Park Ikmo,Lim H. 한국전자파학회 2005 한국전자파학회논문지 Vol.16 No.3
In this paper we propose the compact three-layer EBG structure. The unit cell of the proposed EBG structure is composed of a square patch in the upper layer and a square ring stripline in the lower layer that are connected to the ground plane through conducting vias. Reflection phase analysis method and tangential transmission method were considered to accomplish effective EM simulation and measurement. EM simulation results indicate that bandgap characteristics of the EBG structure using both methods is nearly identical. Parametric studies have been performed with the EM simulator to analyze the properties of the EBG structure by investigating the phase shift of the normally incident plane wave, and the transmission measurements between simple monopole antennas positioned near the EBGstructure have been done. The operating fiefuency bandgap of the proposed EBG structure is about 34 $\%$ lower than the conventional EBG structure with the same size. Measured results show bandgap from 0.930 GHz to 0.945 GHz. 본 논문에서는 사각 패치와 사각 링 스트립선로가 전자기적으로 결합된 3층 구조의 소형화된 EBG구조를 제안하였다. 제안한 EBG 구조는 상층의 사각 패치와 하층의 사각 링 스트립선로가 비아에 의해 접지면에 연결되었다. 반사위상 EM시뮬레이션을 통해 EBG구조 표면에서의 반사위상을 계산하여 EBG구조의 밴드갭 특성을 연구하였고, 반사위상에서 나타나는 밴드갭과 투과계수(S$_{21}$)에서 나타나는 밴드갭이 일치하는 것을 EM 시뮬레이션을 통해 확인하였으며, 측정은 제작이 용이한 프로브 안테나를 사용하여 EBG 구조의 표면을 진행하는 표면파의 투과계수를 측정하였다. 제안한 EBG구조는 동일한 크기의 기존 3층 구조에 비하여 밴드갭이 나타나는 주파수가 약 34 $\%$ 감소되었다. 측정한 결과 제안한 구조는 0.930 GHz에서 0.945 GHz까지의 밴드갭을 갖는다.
신수미(Sumi Shin),류범종(Bum-jong Yu),신동구(Dong-gu Shin) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.1B
SOA에 대한 도입희망이 여러 분야에서 가속화 되고 있지만 서비스 모델링에 대한 구체적인 방법과 사례가 부족하며, 제안된 모델링 방법들은 비즈니스 분석에 집중되어 있거나 서비스의 도출에 대한 구체적 절차와 서비스 식별 기준을 명확하게 정의하지 않아 실제 시스템의 개발에 적용하는데 어려움이 있다. 본 논문에서는 효율적인 서비스 모델링을 위하여 지금까지 많은 시스템들이 구축에 활용되었던 방법론에 대한 결과물인 유즈케이스(Use Case)를 활용하여 프로젝트의 특성에 관계없이 적용될 수 있는 구체적인 서비스 정의 방법을 소개한다. 또한 이를 위한 서비스 구분과 서비스 아키텍처를 제안하고 제안된 서비스 정의 방법을 국가성과정보시스템의 구현에 적용한 사례를 소개한다
RSS 기반 과학기술정보 배급표준 시스템(STI-RSS)의 개발과 활용방안에 대한 연구
권이남,김재수,신동구,전성진,정택영,Kwon, Lee-Nam,Kim, Jae-Soo,Shin, Dong-Gu,Jhun, Sung-Jin,Jeong, Teak-Young 한국과학기술정보연구원 과학기술정보센터 2005 Journal of Information Science Theory and Practice Vol.36 No.4
최근 이메일 서비스의 보완 수단으로서 RSS(Really Simple Syndication)를 이용한 정보 서비스가 활성화되고 있다. 과학기술 분야의 정보는 매우 방대하고 다양하며, 정보의 발생주기 및 서비스 또한 복잡한 특성을 가지고 있다. 단일 정보를 제공하는 기관인 경우 RSS를 이용한 정보 서비스는 정보를 제공하는 하나의 채널을 확보하는 의미에서 구현 시 고려해야 할 요소가 많지 않지만, 다양하고 방대하며 전문적인 과학기술정보의 특성을 반영한 RSS 서비스는 보다 정교한 설계와 구현을 필요로 한다. 본 연구에서는 RSS와 다른 정보배급 프로토콜을 비교하고, 국내외 RSS 동향조사를 수행하였으며, 과학기술정보의 특성을 고려한 RSS 기반 과학기술정보배급 시스템(STI-RSS)의 구현을 고찰하고 이의 활용방안을 제시하고자 한다. Information services adopting RSS(Really Simple Syndication) is on an increase. It is replacing the existing email services. Information in the area of science and technology is of vast amount and various area and their life-cycle and service is complex. Institutions providing information of a single area are not faced with many obstacles in designing information services using RSS in acquiring a channel for the service. However, RSS service in the area of science and technology has to be more specific in designing and implementing the services. In this study, RSS is compared with other information service protocols, domestic and international trends in the area of RSS is analyzed to implement the RSS based Science and Technology information service system(STI-RSS) and its service.
성인에서 안정시 적정 심장박동수 및 심장박동수에 영향을 미치는 인자
조현수 ( Hyun Soo Cho ),신동구 ( Dong Gu Shin ),배준호 ( Jun Ho Bae ),손장원 ( Jang Won Sohn ),홍그루 ( Geu Ru Hong ),박종선 ( Jong Sun Park ),김영조 ( Young Jo Kim ),심봉섭 ( Bong Sup Shim ),김형준 ( Hyung Jun Kim ) 대한내과학회 2007 대한내과학회지 Vol.72 No.2
Background: The resting heart rate (HR) or HR recovery after exercise is one of the important predictors of cardiovascular disease mortality. However, few studies have addressed the ideal range of the HR. We sought to define the normal HR of healthy adults who have no evidence of cardiovascular or systemic illness, and none of the component of metabolic syndrome (MS). Methods: We analyzed a total of 20,162 asymptomatic adults, who were referred for a general health evaluation. All participants underwent careful clinical evaluation, including a detailed history, physical examination and laboratory workup. The mean HR for 30 seconds in the morning after an overnight fast was obtained. There were 7,823 subjects who were free of any component of MS. There were 935 MS patients, and 10,492 patients had ≥1 component of MS. Results: The HR was faster in women. The resting HR of healthy men was 59.9±8.2 bpm, and that of healthy women was 63.7±8.5 bpm. There was significant correlation between the HR and the age of healthy adults (r=-0.008, p<0.001). The mean resting HR was higher in the MS patients than that of their healthy counterparts (67.4±10.6 bpm vs 62.0±8.6 bpm, respectively, p=0.000). A significant gradual increase of HR was observed as the numbers of MS component increased (r=0.127, p<0.001). The systolic blood pressure, fasting blood sugar, HbA1c, triglyceride, γGTP, uric acid and CRP were significantly correlated with HR. Conclusions: We herein newly define the optimal HR in a healthy adult population. Follow-up study is needed to clarify the role of HR as a risk stratifier. (Korean J Med 72:172-180, 2007)