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이용주,김영주,박다진,Danny Liew,이용주 한국보건의료기술평가학회 2017 보건의료기술평가 Vol.5 No.2
Objectives: Many studies are being conducted around the globe to assess the feasibility of multiple criteria decision analysis (MCDA) in health technology assessment (HTA). In this review, we assessed MCDA methodologies and decision criteria used in HTA. Methods: A total of 35 studies published from 2005−2015 that applied MCDA in HTA were selected and the following areas were reviewed: 1) Context of the decision making: decision making setting, level (e.g., micro, meso, macro), and the assessment target (e.g., healthcare policy, drugs, health program, medical test, medical device, treatment, or surgery), 2) MCDA methodology: type of MCDA technique, weighting method, criteria elicitation method, and the participants, 3) Decision criteria: feasibility, social/population impact, intervention related factors, patient/individual-centered values, budget impact, and quality of evidence, and 4) Transparency of the decision making process: the process was considered transparent if the study disclosed the weight of each criterion, the formula used to calculate the final score or if the weighting/calculation method was well explained to the level considered acceptable by the authors. Results: Of the studies reviewed, 63.9% used MCDA for decision making at a national level, and the type of HT being assessed was most often national/regional healthcare policy (44.1%). The most prevalent method of weighting was direct weighting using scales (40.0%). Most of the studies (80.0%) conducted group discussions for criterion selection, and among the criteria, intervention-related factors such as safety and efficacy (93.9%) were most often observed, followed by budget-impact (81.8%) and patient/individual-centered values (81.8%). Conclusion: Substantial demands for incorporation of patient-centered values into the current HTA process were observed. Additionally, MCDA may be a useful tool in incorporating such values to the HTA decision framework, but unresolved methodological issues remain. Further assessment on the application of MCDA in HTA should be conducted for Korea-specific settings.
이용주,Lee, Yong-Ju 한국광학기기산업협회 2005 光學世界 Vol.100 No.-
레이저 핵융합 반응을 이용하여 중성자를 발생시키는 기술은 레이저 핵융합 발전로의 개발을 위한 중간단계 기술로 알려지고 있으며 선진국들은 이미 거쳐 간 단계라고 할 수 있다. 그러나 국내에서는 아직 레이저 핵융합에 대한 본격적인 연구가 이루어지지 않고 있던 상황에서 최근 한국원자력연구소의 고속 중성자 발생 실험 연구성과는 시사하다 바가 매우 크다고 할 수 있다.
이용주,황재성,이철기 한국ITS학회 2016 한국ITS학회논문지 Vol.15 No.3
기존 실시간 신호제어시스템은 과포화 상황, 지점검지 및 매설식 검지체계의 문제점이 제기됨에 따라 ITS의 활성화와 검지체계의 발전 등으로 진보된 차세대 신호제어시스템의 개발이 요구되고 있다. 본 논문은 차세대 신호제어시스템을 위 해 신호제어 기초 변수를 기존 통과교통량이 아닌 교차로 대기행렬을 활용할 수 있도록 대기행렬길이의 산출을 목적으로 하였다. 기존 시스템의 한계로 나타난 과포화 상황에 중점을 두어 범위를 설정하였다. 실시간으로 수집되는 개별차량 위치 정보를 좌표로 변환하여 최소제곱법을 이용한 회귀모형에 적용하여 추출한 직선식을 충격파 모형에 적용하였다. 산출된 대기길이와 링크길이의 비교를 통해 대기길이가 링크를 초과하는 경우 상류부 대기차량이 하류부 교차로에 영향을 미친 다고 판단하여 하류부 교차로 대기행렬까지 대기길이로 포함하였다. 추출된 대기행렬길이의 신뢰성을 판단하고자 링크 통 행시간과의 상관분석을 실시한 결과 두 링크 모두 0.9이상의 수치를 나타내며 높은 상관관계를 보이는 것으로 판단되었다. 본 연구는 실시간으로 수집되는 데이터를 이용하여 대기행렬길이를 산출할 수 있다는 점과 이를 이용하여 신호제어시스 템의 개선에 기여할 수 있다는데 의의가 있다. Existing real-time signal control system was brought up typical problems which are supersaturated condition, point detection system and loop detection system. For that reason, the next generation signal control system of advanced form is required. Following thesis aimed at calculating queue length for the next generation signal control system to utilize basic parameter of signal control in crossing queue instead of the volume of real-time through traffic. Overflow saturated condition which was appeared as limit of existing system was focused to set-up range. Real-time location information of individual vehicle which is collected by GPS data. It converted into the coordinate to apply shock wave model with an linear equation that is extracted by regression model applied by a least square. Through the calculated queue length and link length by contrast, If queue length exceed the link, queue of downstream intersection is included as queue length that upstream queue vehicle is judeged as affecting downstream intersection. In result of operating correlation analysis among link travel time to judge confidence of extracted queue length, Both of links were shown over 0.9 values. It is appeared that both of links are highly correlated. Following research is significant using real-time data to calculate queue length and contributing to signal control system.
응급의료센터를 내원한 소아외상 환자에서 손상정도치의 유용성
이용주,이준희,김지혜,백광제,김준식,한승백,신동운,김아진 대한외상학회 2001 大韓外傷學會誌 Vol.14 No.1
Background: The ISS (injury severity score) describes anatomic scores based on anatomic diagnosis. In adults, the ISS has been a useful measurement of morbidity and mortality. Methods: A total of 164 cases of injured children 0 to 15 years of age who visited the emergency center and were admitted to our university hospital from January 1999 through February 2001 were retrospectively reviewed. Results: The male-to-female ratio was 1.7 : 1, and the Means of ISS was 7.60±6.38. The cause of injury influences the ISS, but the mechanism of injury does not. A comparison of the ISS between patients directly transported to our hospital and patients transferred from other hospital, showed not significant difference. A comparison between groups treated and not treated in intensive care units showed a signifiant difference in ISS (17.09±8.22 vs 6.06±4.43). but no significant difference in PTS (pediatric trauma score). This study documents a linear relationship between ISS and hospital days, and a reverse linear relationship between ISS and PTS. Conclusion: These results suggest that the ISS is as useful a trauma scoring measurement of severity and outcome predictor in child trauma as in adult trauma.
이용주,이건호 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
This paper represents solenoid design of control valve for incline angle control in variable compressor. Some theoretical and numerical analysis was performed to analyse solenoid and compared with experimental results. Maxwell program was used for numerical analysis. Through redesigns of housing body, plunger, core, and disk in control valve, a needed force was gotten. Reduction of core groove and housing body air-gap had a big influence for improving magnetic force. But increasing of disk thickness had a little effect on magnetic force. Control valve efficiency could be improved through the magnetic force increasing.