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정용일,이방래,주시형,원동규,배영문,Jeong, Yong-Il,Lee, Bang-Rae,Joo, Si-Hyung,Won, Dong-Kyu,Bay, Young-Moon 한국과학기술정보연구원 과학기술정보센터 2007 Journal of Information Science Theory and Practice Vol.38 No.1
우리나라의 과학기술성과가 1997년부터 2003년까지 지역별로 얼마나, 어떻게 산출되는가를 살펴보고 지역별로 어떠한 특성을 갖는가를 분석하였다. 지역특성화 분석은 주요 과학기술성과인 논문과 특허정보를 기반으로 우리나라의 광역자치단체 중에서 서울, 부산, 인천, 울산, 대구, 광주, 대전 등 1개 특별시와6개 광역시를 대상으로 하였다. 우리나라의 주요 지역의 기술 분야별 논문과 특허의 게재 및 등록 순위, 게재 건수 및 등록 건수 분포를 계량정보학의 방법론을 적용하여 분석하였다. 분석결과 과학기술성과가 지역 차원에서 몇 개의 소수 분야에 집중되고 있음을 확인하였다. 또한 지역 차원에서 기술의 성과가 과학의 성과보다 좀더 소수의 몇 개 분야에 집중되고 있음을 확인하였다. The advance of science and technology becomes the nerves of the development of economy and industry of our future in the regional level as well as in the national and international level. In Korea, it has been more than 10 years since local governments launched, and they are strategically fostering their specialized regional industries. Both the central government and the regional governments prepare and execute policies to foster specialized regional industries. Though there are many kinds of methods to analyze the outcomes of science and technology of region, in this paper, we measure the outcomes of science and technology of region by applying an informetric analysis on the SCIE papers and USPA patents. To seek for the regional speciality, we analyze the total national outcomes and the regional outcomes of S&T activities in Korea.
과학기술 지식전문가 정책 네트워크 유형분석 : 한민족과학기술자 네트워크(KOSEN)를 중심으로
정용일,이주영,윤정선,Jeong, Yion-Il,Lee, Joo-Young,Yoon, Jung-Sun 한국과학기술정보연구원 과학기술정보센터 2005 Journal of Information Science Theory and Practice Vol.36 No.4
과학기술 전문가 커뮤니티로서 가장 성공적인 모델인 '한민족과학기술자네트워크(이하 KOSEN)'를 대상으로 정책 네트워크의 분석방법을 이용하여 네트워크가 갖는 고유의 특성을 유형별로 분석해 보고자 한다. 과학기술 전문인력을 대상으로 하는 KOSEN을 사례로 정책 네트워크 분석을 적용, 지식전문가 네트워크의 유형을 구분해 보았다. KOSEN에 대한 개괄적인 특성분석과 더불어 참여자의 특성에 따라 전문가 그룹 네트워크를 정책공동체의 핵심 및 주변공동체와 이슈 네트워크로 세분화했다. 정책 네트워크의 분석수준과 관련하여 본 연구는 네트워크의 속성을 개인의 행위로 환원시켜서 이해하는 미시적 접근에 초점을 두었다. Experts participating in the knowledge expert network externalize their implicit knowledge by providing information or writing reports. Almost all the members of the network share externalized knowledge and the network facilitate the dissemination and diffusion of knowledge. Individuals reproduce another implicit knowledge by internalizing shared knowledge through the network and re-created knowledge is externalized, establishing knowledge circulation. In this paper, we analyze the expert groups of the Global Network of Korean Scientists & Engineers(KOSEN, www.kosen21.org), the Korea's No. 1 science and engineering knowledge expert community, with the application of the theory of policy network proposed by Marsh & Rhodes. According to the principal standards of policy network classification such as the number of participants, interaction among participants, consistency, distribution of resources and dependency, we categorize the KOSEN expert groups as closed policy network and opened issue network, and divide closed policy network into core community and periphery community.
[論文] 스파아크 點火機關의 사이클 시뮬레이션과 實驗的 方法에 의한 性能,排出가스,EGR效果의 豫測에 關한 硏究
정용일(Jeong Young il),성낙원(Sung Nak Won) 한국자동차공학회 1986 오토저널 Vol.8 No.2
The prediction of performance, exhaust emissions and EGR effect is made by the SI engine cycle simulation. In this simulation several models are employed - two zone, thermodynanlic combustion, mass fraction burned, heat transfer, chemical equilibrium, chemical kinetics for NOx, laminar flame speed for ignition delay.<br/> The chemical species in burned gas considered are 13 species CO₂, CO, O₂, H₂O, H₂, OH, H, 0, N₂, NO, N0₂, N, Ar-and the cylinder pressure, burned and unburned zone temperature and composition of gas are calculated at each crank angle through the compression, ignition delay, combustion and expansion process.<br/> To check the validity of the model, experimental study is done for measuring emissions, combustion pressure and engine output.<br/> The predicted values for pressure and emissions show qualitative agreement with the measured data and the EGR effect also shows similar tendency.
성낙원(Nak Won Sung),정용일(Young Il Jeong),박신현(Shin Hyun Park) 한국자동차공학회 1986 오토저널 Vol.8 No.1
The purpose of this study is to develop an exhaust gas recirculation valve for reduction of the NOx emission of the gasoline engine.<br/> In this study the back pressure modulated (BPM) EGR system was developed and tested for the 1.6ℓ gasoline engine. By this system 50% of NOx emission was reduced at 7% EGR rate. Fuel consumption and CO emission were not affected by EGR but HC was increased up to the level of allowable limit. Overall operation was satisfactory. As a result of this study, the technics for developing EGR valve and adjusting the engine for EGR have been established.
전기집진 기제를 조합시킨 DPF용 금속 폼 필터의 여과 특성
박석주,이동근,김진현,조규백,김홍석,정용일,Park, Seok-Joo,Lee, Dong-Geun,Kim, Jin-Hyun,Cho, Gyu-Baek,Kim, Hong-Suk,Jeong, Young-Il 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.2
Filtration studies, using simulated test nanoparticles or diesel nanoparticles, have been performed about Inconel foam filters for DPF combined with electrostatic precipitation. The simulated test particles were synthesized by laser ablation in the nitrogen atmosphere at the standard condition. The diesel particles were exhausted from the diesel engine driven on the condition of idle or load mode. Filtration efficiency of the metal foam filter is very low because most of particles are penetrated through the large pores of filter. However, the efficiency was considerably improved by applying the electric field to the filter and/or charging the nanoparticles. Nevertheless, the pressure drop of filter hardly increased because the filter-pores were not clogged by deposited particles and kept open.
Spray-Guided GDI 단기통 엔진에서 연소안정성에 영향을 미치는 인자에 관한 연구
김성대(Sung Dae Kim),오진우(Jin Woo Oh),박철웅(Cheol Woong Park),김홍석(Hong Suk Kim),정용일(Young il Jeong) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The spray-guided GDI combustion system has many advantages compared with wall-guided and air-guided GDI combustion systems. The spray-guided system, of which injector is located at the center of combustion chamber, can provide a stratified mixture at the spark plug and reduce wall wetting of injected fuel significantly. In this research, the spray-guided injection system was used to make homogeneous and stratified mixture. Injection system is important value in spray-guided GDI engine. This study shows the stoichiometry and lean burn characteristics at a constant engine operating condition (2000 rpm, IMEP 0.28 ㎫). As experimental parameters, injection applied voltage was varied from 140, 160, 180, 200 V. Also, piezo-injector open duration was varied from 120, 150, 180 usec. The result shows, lean-combustion GDI engine can be achieved better combustion stability through optimization injection applied voltage and piezo-injector open duration time.
노인환자에서 Taylor`s Approach를 통한 척추마취
정용일,정병연,임유택,하동춘 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.33 No.5
The Taylor's approach is a special paramedian approach to enter the L5-S1 interspace. The L5-S1 interspace is the largest in vertebral column. This approach is particularly useful when the interspace has been narrowed by pathologic bone destruction such as rheumatoid arthritis or osteoarthritis. Surgery in geriatric patients is associated with a markedly higher incidence of perioperative complication or mortality rate. Optimal anesthetic management of geriatric patients depends on understanding of the normal anatomy and physiologic changes in response to drug in aging. We studied of 3-geriatric patients with Taylor's approach. These patients had problems with respiratory dysfunction and anatomic constraints, which make other approaches unfeasible. (Korean J Anesthesiol 1997; 33: 970∼973)
편도절제술을 받는 어린이에서 술전 Bupivacaine 침윤과 Fentanyl 투여가 술후 통증에 미치는 효과
정지영,정용일,정병연,권혁권,임유택,하동춘 대한마취과학회 1999 Korean Journal of Anesthesiology Vol.33 No.6
Background : Early postoperative pain following tonsillectomy is a significant discomfort and lead to inappropriate coughing reflex and restlessness on children. We evaluated the effect of intravenous fentanyl and peritonsillar bupivacaine infiltration on postoperative pain in children. Methods : We studied the 45 children for tonsillectomy. Group I received intravenous fentanyl(1 ㎍/kg) before surgical incision. Group II received 0.5% bupivacaine(2-10 ml) with epinephrine(1:100,000) on the peritosillar area before peritonsillar incision. Group III received saline infiltration instead of bupivacaine. Results : Visual analogue scale(VAS) observed at recovery room, 1hr, 2hr, 4hr after tonsillectomy were significantly lower in group I and II than group III but VAS at 8hr were similar among 3 group. Time to first request of analgesics showed no statistical significance between fentanyl group and bupivacaine group but saline group showed statistical significance. Total required dosage of analgesics showed no statstical significance among the 3 group. Conclusions : Preincision intravenous fentanyl and bupivacaine infiltration are both effective on postoperative pain control after tonsillectomy in children. (Korean J Anesthesiol 1997; 33: 1148∼1153)