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High Rate DAF를 위한 플록형성공정의 설계와 기포발생시스템의 운전조건 결정
김상범 ( Sangbeom Kim ),이승욱 ( Seunguk Lee ),이승호 ( Seungho Lee ),한무영 ( Mooyoung Han ),박현주 ( Hyun-ju Park ),김충일 ( Tschung-il Kim ) 한국수처리학회 2017 한국수처리학회지 Vol.25 No.5
To increase the loading rate in a dissolved air flotation (DAF) process, the flocculation basin was removed, and new methods that use the hydraulic energy of the contact zone were devised. Although the highest treatment efficiency was shown at the conventional flocculation basin, when a certain treatment target percentage was set, the new methods proved to be effective at increasing the hydraulic loading rate and reducing design and operational costs. The DAF process usually uses a deep bubble bed depth to attain higher treatment efficiency, however, as hydraulic loading increases, the treatment efficiency tends to decrease because of the increase in downward current. To solve this problem, bubble bed compactness was introduced as a new index. Pressure could be used to control the bubble bed compactness, and the treatment efficiency increased at high compactness even though the size of the generated bubbles was relatively large.
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김상범 ( Sangbeom Kim ),주진원 ( Jinwon Joo ) 충북대학교 건설기술연구소 2018 건설기술논문집 Vol.37 No.2
Posterior instrument fixation with pedicle screws has been widely used because it has the advantage of firmly fixing the spine with minimal incision. In this paper, we measured the extraction load of the pedicle screw, which is a major component of various types of medical implant fixtures, so that it can be used as data for securing safety during surgery. For this purpose, we performed the pull - out load test of a number of pedicle screws developed using a tensile tester and analyzed the results. The relationship between the load and the displacement changes linearly at first, then it changes gently without apparent yielding phenomenon, reaches the maximum value, and is rapidly drawn out by decreasing the load. No fracture of the six pedicle screws and ultrahigh molecular weight polyethylene block was observed when an extreme load was applied to the pedicle screws. When the average yielding load of the additional screw was 1278.54 N, the average displacement was 1.297 mm and the yield stress was 13.01 MPa average. The mean value of the maximum ultimate load was 1518 N, and the standard deviation for the four specimens was 143.2 N, which was relatively large.
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국내06/북미ULEV-II 대응 촉매장치 강건설계 최적화 연구
김상범(Sangbeom Kim),김성근(Sungkun Kim),장한수(Hansoo Chang),김홍집(Hongjip Kim),연태헌(Taehun Yeon) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The conventional aftertreatment systems to meet the stringent ULEV-Ⅱ emission regulation are usually composed of warm-up catalytic converter (WCC) and underfloor catalytic converter (UCC). However, those systems bring high cost, high back pressure, the limit of engine room for package design, and other side effects. The new optimized system needs to solve these problems and to meet ULEV-Ⅱ emission regulation efficiently. There are many technologies and design parameters in exhaust catalytic converter systems ; exhaust manifold structure, exhaust gas flow distribution, location of catalytic converter, PM coating technologies, substrate characteristics, and volume of catalysts. It is a key factor to make a optimized robust system with those parameters and technologies described. The new optimized exhaust and Integrated Close-coupled Catalytic Converter (ICCC) system can meet ULEV-Ⅱ regulation and can solve those problems of conventional system by a robust design. This study was focused on the optimization process of exhaust and ICCC system to determine robust design control factors, which are durability of catalyst - aged and/or fresh - , by vehicle evaluation, FTP-75.
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심리적 주인의식과 업무몰입의 관계에 대한 국내·외 연구동향
김상범 ( Kim Sangbeom ),조현정 ( Jo Hyunjeong ),김우철 ( Kim Woocheol ) 한국인력개발학회 2021 HRD연구 Vol.23 No.1
The main purpose of this study was to examine the relationship between psychological ownership and work engagement based on the extant literature and to explore the direction of future research. To achieve the purpose of the research, a total of 26 relevant articles were finally selected and the results were as follows. First, research on psychological ownership and work engagement has been gradually increasing since 2015, and target samples of these studies have focused on corporate employees and service workers in the fields of management, tourism, etc. Second, in most studies psychological ownership was examined as a predictor to work engagement whereas work engagement was investigated as a predictor to psychological ownership in several studies. Third, in the relationship between the two variables, the antecedent and consequent variables were identified in relation to the job demand-resource (JD-R) model. Finally, the results of the study revealed that among the two perspectives (job/organization) of psychological ownership, the selected studies were mainly conducted in which organization-based psychological ownership influenced work engagement. Based on these research results, HRD implications and recommendations for future research were discussed.
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Aileron Actuator의 기구학적 분석 및 구조해석에 관한 연구
김병삼(ByeongSam Kim),장기원(KiWon Jang),김상범(SangBeom Kim),김대현(DaeHyun Kim),박중현(JungHyun Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The wings are mounted inside the actuator system in order to meet the needs of aileron design and kinematic analysis and Structural analysis, to ensure the structural safety analysis results are presented. Using kinematic analysis program Sim Design Aileron force acting on the joints, and information about Torque aileron requirements correct the condition was confirmed. Based on this information for each part using the Abaqus was the Structural Analysis. Margin of safety of hydraulic components and was confirmed by checking the structural safety.
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