http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
실험계획법을 이용한 GDI연료펌프의 맥동저감을 위한 댐퍼 최적설계
김주영(Juyeong Kim),노진이(Jinyee Noh),이종욱(Jongwook Lee),김경남(Kyungnam Kim),박형종(Hyoungjong Park),황재근(Jaekeun Hwang),이연홍(Yeonhong Lee),윤길호(Gilho Yoon) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
This study optimizes the profile of the diaphragm of a pressure pulsation damper structure in a high-pressure GDI engine system which is now under development by applying the design of experiment (DOE). As a high pressure pulsation ranging from 0 to 10 Bar deteriorates the performance of GDI engine, it is necessary to attenuate the large amplitude of fluid pulsation pressure of Gasoline fuel directly injected into GDI engine. In the development of this pressure damper, it becomes an issue to design optimal profiles of the enveloping diaphragms in terms of pulsation efficiency and mechanical stress for the sake of safety. Thus, this research develops a new finite element procedure considering the internal pressure variation by assuming the isoenthalpy state of the enveloped Helium gas inside the damper and integrates the iterative finite element procedure with the design of experiment (DOE).
김주영(Juyeong Kim),김철(Cheol Kim),이영춘(Youngchoon Lee),조명재(Myengjae Cho) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Combined forces and moments on the body of commercial vehicles are transferred to car wheels. The connecting mechanical part between a vehicle and a wheel is a steering knuckle. The steering knuckle should ensure various vertical and horizontal loads such as rolling and dive when sudden stop or steering take place. Stress distributions were calculated and analyzed for optimal design. This study discussed for steering knuckle characteristics and how to design the optimal steering knuckle.
줄넘기 운동이 초등학교 여학생의 건강체력과 골밀도에 미치는 영향
김주영(Kim, Juyeong),김경래(Kim, Kyeonglae),안민지(Ann, Minji),김태형(Kim, Taihyung) 학습자중심교과교육학회 2016 학습자중심교과교육연구 Vol.16 No.10
이 연구는 줄넘기 운동이 초등학교 여학생들의 건강체력과 골밀도에 어떤 영향을 주는지 규명하는 데 목적이 있다. 이 연구의 목적을 달성하기 위하여 Y도시에 소재한 P초등학교 5, 6학년 여학생 30명을 임의로 선정한 후, 운동집단과 비교집단에 각 각 15명씩 무선 배정하고 운동처치 전․후의 건강체력과 골밀도를 측정하였다. 운동처치 유무에 따른 집단 내 평균차이 및 실험 후의 집단 간 평균차이를 확인하기 위하여 SPSS 18.0 통계 프로그램을 사용하여 t-검증을 실시하였으며, 그 결과는 다음 과 같다. 첫째, 12주 동안의 줄넘기 운동은 5, 6학년 여학생의 심폐지구력, 유연성, 근력, 근지구력, 체지방률의 개선에 큰 도움이 되었다. 둘째, 12주 동안의 줄넘기 운동 후 골밀도의 측정결과 비교집단은 평균점수가 감소하였고 운동집단은 평균점수가 증가하였으나, 통계적으로 유의한 차이를 보이지 않았다. 결론적으로, 이 연구에서 사용된 줄넘기 운동은 초등학교 여학생의 건강체력 향상에는 효과가 있었으나 골밀도 향상에는 통계적으로 유의한 효과가 없는 것으로 나타났다 The purpose of this study is to investigate that rope skipping exercise influence on health related fitness and bone density of 5th and 6th grade female elementary school students. To achieve this purpose, 30 female elementary school students who 12-13 years old at P elementary school located in the Y city were randomly selected for the subject of this study. They were classified into training group (n=15) and control group(n=15), then measure health related fitness and bone density of exercise prescription of the pre and the post. This study conducted the t-test using SPSS WIN Ver. 18.0 statistics program. The results are as follows. First, the rope skipping exercise training during 12 weeks helped elementary school girls improved the cardiorespiratory endurance, flexibility, muscle strength, muscular endurance and % body fat. During 12 weeks, exercise group was shown different significantly but there was no significant difference in the control group of these all elements. Secondly, the change of bone density after 12 week rope skipping exercise training did not show significant difference statistically. In conclusion, this study using rope skipping exercise was effective for enhancement of health related fitness but bone density was no significant difference statistically.
김주영(Kim, Juyeong),박정은(Park, Jeongeun) 한국유통학회 2011 流通硏究 Vol.16 No.5
현재 우리나라에는 약 1500여개의 재래시장이 있다. 이들 재래시장은 삼성과 롯데와 같은 대기업에 의해 운영되는 SSM과 할인점 등의 시장 진입으로 인해 경쟁이 치열해지고 있고 급변하는 유통환경의 변화에 따라 생존의 위협을 받고 있다. 또한 재래시장의 파워가 약해짐으로 인해 지역 상인들의 생존이 위협을 받고 있고, 지역 경제 또한 악화되고 있다. 따라서 백화점과 할인점을 선호하는 소비자들에게 보다 나은 가치를 제공해 주기 위해 재래 시장은 보다 시장지향적인 전략을 취해 나가야 할 것이다. 시장지향적 전략은 다음 세가지 하부 개념으로 이루어진다 (Narver와 Slater,1990): 고객 지향성 (customer orientation), 경쟁지향성 (competitor orientation), 그리고 기능간 조정 (inter-functional coordinations). 본연구의 첫 번째 목적은 지역 사회에서의 재래시장의 적절한 역할을 제안하는 것이다. 둘째는 재래시장이 지역에서 장기적으로 생존하기 위해 필요한 시장 지향적인 기능을 알아보고자 한다. 마지막으로 본 연구는 다양한 지역사회와 다양한 상황에서 재래시장이 지향해야 할 성공적인 재래시장 유형을 개발하기 위해 적절한 정책 방향을 제안하는 것이다. 이들 목적을 성취하기 위해 본 연구는 다음과 같은 구성으로 되어 있다. 우선 재래시장과 지역 경제 발전을 위한. 기존의 연구보고서와 정책 보고서를 살펴보고 기존 정책의 장-단점을 제시하였다. 둘째로 재래시장의 시장지향적인 유형과 기준을 제시하였고, 지역 시장과 지역의 경제 상황 특성에 따라 재래시장의 기능과 발전 형태에 대해 제안하였다. 마지막으로 본연구의 공헌점과 미래 정책 개발에 있어서의 시사점 둥을 토론 하였다. 특히 정책 개발 방향에 있어 본 연구는 정책의 효율성과 경제적 효과, 인력 개발과 운영 시스템, 그리고 이러한 개발과 정에서의 정부의 역할과 지역 상인의 보호 방안등에 대해서 중점적으로 논의를 하였다. There are about 1,500 small or large traditional markets in Korea. Those conventional markets have been struggling for survival in rapidly changing market environment with highly intensified competition by accelerating the entrance of the Large-scale Discount Store and Super Supermarket which are managed and supported by Large companies like Samsung and Lotte. The loosing power of conventional markets have threatened the local merchants" survival and have influenced local economics falling down. To create better value for the customers who have more preference for department store and discount stores than conventional markets, conventional markets should have market orientation, which has three sub dimensions; customer orientation, competitor orientation and inter-functional coordinations. First objective of study is to find the appropriate roles of conventional markets in local areas. Second is to find out the market orientation functions for conventional markets to be survival in local markets in the long terms. Finally, this study will suggest some policies for the appropriate types of successful conventional markets considering various local situations. To achieve those objectives, we did the following procedure. First, we review the previous reports and studies of policies for conventional markets and local economy development, and propose some pros and cons of the previous policies. Secondly, we develop a market orientation framework of conventional markets, in which we suggest the developmental types and functions of market- orientation of conventional markets in accordance with the characteristics of local market and economic conditions of local areas. Then we formulate and discuss the study"s contributions, managerial implications, and directions for future policy development. Especially for the policy development, we suggest the efficiency and economical effects of policy, human being development and management system, and the role of government and protection of local merchants in the development process.
미세 기공의 한정된 공간에 의한 게스트 분자의 광학 특성 변화 고찰
박수현,김주영,Park, Suhyeon,Kim, Juyeong 한국분말재료학회 (*구 분말야금학회) 2020 한국분말재료학회지 (KPMI) Vol.27 No.6
Metal-organic frameworks (MOFs) are of significant interest because of their high porosity, which facilitates their utilization in gas storage and catalysis. To enhance their current properties in these applications, it is necessary to elucidate the interactions between molecules in a confined environment that differ from those in bulk conditions. Herein, we study the confined molecular interaction by investigating the solvent-dependent photophysical properties of two different-sized molecules inside MOF-5. Ruthenium tris-bipyridine (Rubpy) and coumarin 153 (C153) are encapsulated in MOF-5. Rubpy with MOF-5 (Rubpy@MOF) is prepared by building MOF-5 around it, resulting in limited space for solvent molecules in the pores. The smaller C153 is encapsulated in the preformed MOF-5 (C153@MOF) by simply soaking the MOF in a concentrated C153 solution. C153@MOF permits more space for solvent molecules in the pore. Their characteristic absorption and emission spectra are examined to elucidate the confined molecular interactions. Rubpy@MOF and C153@MOF exhibit different spectral shifts compared to the guest molecules under bulk conditions. This discrepancy is attributed to the different micro-environments inside the pores, derived from confined host-guest interactions in the interplay of solvent molecules.
하이브리드 금속-유기 골격체의 암모니아 흡탈착 특성 연구
배정원(Cheongwon Bae),정규영(Gyuyeong Jeong),박수현(Suhyeon Park),김예람(Yeram Kim),구민규(Mingyu Gu),김덕종(Duckjong Kim),김주영(Juyeong Kim) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
An adsorption heat pump has recently emerged as energy-efficient heating and cooling system. The amount of adsorbed working fluids is an important factor at low-grade temperatures to utilize waste heat and thermal energy storage. Metal-organic frameworks(MOFs) are regarded as promising adsorbents due to their large specific surface area, tunable pore size, and pore chemical properties. However, there have been few reports that investigated ammonia uptake performance with MOFs and their nanocomposite at high ammonia pressures in low working temperatures. Herein, we developed a hybrid nanocomposite with a MOF and reduced graphene oxide(rGO) composite through a one-pot hydrothermal reaction. Its ammonia adsorption capacity was evaluated under high ammonia pressures, which showed that the nanocomposite with 3.7% rGO could have higher ammonia adsorption capacity than pure MOF.