http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kang, Joowon 한국전산구조공학회 2000 한국전산구조공학회논문집 Vol.13 No.1
새로운 공학재료의 하나인 복합재료는 뛰어난 역학적 성질로 인해 공학 전 분야에 걸쳐 사용이 점진적으로 증가하고 있다. 이 복합재료에 대한 개발뿐만 아니라 정적 혹은 동적 하중을 받는 복합 구조물의 연구는 많이 수행되어 왔고 대부분 가해지는 하중은 확정적인 것으로 가정되었다. 그러나 실제 많은 상황에 있어 구조물에 가해지는 하중의 성질은 불규칙적이다. 본 연구에서는 불규칙 진동을 받는 복합적층판의 비선형 해석을 유한요소법에 의거하여 해석하였으며 고전 판 이론과 전단변형을 고려한 1차, 3차 이론을 비교 분석하였다. 많은 복합재료들은 전단 변형에 있어 재료적인 비선형을 나타내므로 이를 본 연구에 포함하였다. Composites are finding increasing use in a wide variety of engineering applications due to their outstanding mechanical properties. A number of studies have focused on the development of new materials as well as the response of composite structures to static and dynamic loads by assuming the external driving forces to be deterministic. However, there are many situations in practice where the exciting forces vary randomly. In this work, the nonlinear response of laminated composite plates excited by stochastic loading is studied by the finite element method. Classical, first-order and third-order shear theories for plates are used in the finite element formulation. Since most composites exhibit significant nonlinearity in the shear stress-strain law, this is included in the present analysis.
Effects of dietary inactivated probiotics on growth performance and immune responses of weaned pigs
( Joowon Kang ),( Jeong Jae Lee ),( Jin Ho Cho ),( Jeehwan Choe ),( Hyunjin Kyoung ),( Sung Hun Kim ),( Hyeun Bum Kim ),( Minho Song ) 한국축산학회(구 한국동물자원과학회) 2021 한국축산학회지 Vol.63 No.3
This experiment was performed to verify whether dietary heat-killed Lactobacillus rhamnosus (LR) improves growth performance and modulates immune responses of weaned pigs. Ninety-six weaned pigs ([Landrace × Yorkshire] × Duroc; 6.95 ± 0.25 kg body weight [BW]; 28 d old) were randomly allocated to four treatments: 1) a basal diet without heat-killed LR (CON), 2) T1 (CON with 0.1% heat-killed LR), 3) T2 (CON with 0.2% heat-killed LR), and 4) T3 (CON with 0.4% heat-killed LR). Each treatment had six pens with four pigs (6 replicates per treatment) in a randomized completely block design. The heat-killed LR used in this study contained 1 × 109 FU/g of LR in a commercial product. Pigs were fed each treatment for four weeks using a two-phase feeding program to measure growth performance and frequency of diarrhea. During the last week of this study, all diets contained 0.2% chromic oxide as an indigestible marker. Fecal sampling was performed through rectal palpation for the consecutive three days after the four adaptation days to measure apparent total tract digestibility (ATTD) of dry matter, crude protein, and gross energy (GE). Blood sampling was also performed on day 1, 3, 7, and 14 after weaning to measure immune responses such as serum tumor necrosis factor-α (TNF-α), transforming growth factor-β1 (TGF-β1), C-reactive protein (CRP), and cortisol. The heat-killed LR increased (p < 0.05) growth rate, feed efficiency, and ATTD of GE for overall experimental period compared with CON, but reduced (p < 0.05) post-weaning diarrhea. In addition, pigs fed diets contained heat-killed had lower concentrations of serum TNF-α (d 7; p < 0.05), TGF-β1 (d 7; p < 0.10), and cortisol (d 3 and 7; p < 0.05) than pigs fed CON. In conclusion, dietary heat-killed LR improved growth rate, modified immune responses of weaned pigs, and alleviated post-weaning diarrhea.
학교 교실내 창문설치형 환기장치 적용에 따른 PM<SUB>2.5</SUB> 및 CO₂ 저감 효과 분석
이주원(Lee, Joowon),강경모(Kang, kyungmo),김태연(Kim, Taeyeon) 한국생태환경건축학회 2021 한국생태환경건축학회 학술발표대회 논문집 Vol.21 No.2
When high concentration of outdoor air PM2.5 is formed, mechanical ventilation with proper air volume and filter is required to manage PM2.5 concentration in school classrooms. The purpose of this study is to monitor, compare, and analyze indoor PM2.5 and CO₂ concentrations during occupancy and non-occupancy periods according to the operation of a window-mounted ventilation system. The result of this study, it was effective to control the PM2.5 and CO₂ concentration by operating the ventilation system during the occupancy periods.
강대현(DaeHyun Kang),양정무(JungMoo Yang),김주원(JooWon Kim),정지은(JiEun Jung),정효순(HyoSoon Jung) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
현재 운용 중인 도시철도 차량 부품은 물리적 형태 및 통신규격 인터페이스가 상이하여 부품 호환성 저하의 원인이 되고 있다. 그 해결책으로, 표준화된 인터페이스 체계 및 부품군 모듈화 마련이 필요하며, 지속적인 도시철도 차량 부품 인터페이스 모듈화를 통해 도시철도 운영기관의 유지보수 효율화와 도시철도 부품생산기업의 소품종 다량생산을 통한 경쟁력 강화가 필요하다. 본 논문은 국외 도시철도차량의 부품구성체계를 조사 분석하여 국내 도시철도차량의 방향성을 논의하고자 한다. Urban railway vehicle components currently being operated, to interface physical form and communication standards are different, causing the compatibility decrease in parts. As a solution, the development of standardized interface systems and components group modularization is necessary, ongoing efficiency of the maintenance of urban rail vehicle parts city rail operator engine via an interface module of the urban railway parts production strengthening of competitiveness through the small species mass production of the company is needed. In this paper, research and analysis of the BOM of international urban rail vehicle, want to discuss the direction of the domestic urban railway vehicle.
강대현(DaeHyun Kang),양정무(JungMoo Yang),김주원(JooWon Kim),정지은(JiEun Jung),정효순(HyoSoon Jung) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.5
현재 운용 중인 도시철도 차량 부품은 물리적 형태 및 통신규격 인터페이스가 상이하여 부품 호환성 저하의 원인이 되고 있다. 그 해결책으로, 표준화된 인터페이스 체계 및 부품군 모듈화 마련이 필요하며, 지속적인 도시철도 차량 부품 인터페이스 모듈화를 통해 도시철도 운영기관의 유지보수 효율화와 도시철도 부품생산기업의 소품종 다량생산을 통한 경쟁력 강화가 필요하다. 또한, 해외시장 진출을 위한 도시철도 차량 부품 인터페이스 모듈화 지원정책 및 추진체계 마련이 필요하다. 1990년대부터 해외 철도분야는 기능/성능에 대한 모듈화 기술을 확보하여 왔으나, 우리나라의 경우 해외 모듈화 기술에 20여년 이상 뒤쳐져 있는 상황이다. 본 논문은 국내외 도시철도 차량의 모듈화 사례를 조사하고, 향후 도시철도 차량 부품 인터페이스 모듈화의 발전 방향을 제시한다. Urban railway vehicle components currently being operated, to interface physical form and communication standards are different, causing the compatibility decrease in parts. As a solution, the development of standardized interface systems and components group modularization is necessary, ongoing efficiency of the maintenance of urban rail vehicle parts city rail operator engine via an interface module of the urban railway parts production strengthening of competitiveness through the small species mass production of the company is needed. In addition, there is a need for the development of urban rail vehicle parts for foray into overseas markets interface module of support policy and propulsion system. In the overseas railway sector since the 1990s it has been to ensure the module technology for function / performance, but, in the case of South Korea, is a situation that has been delayed for more than 20 years overseas module technology. In this paper, we investigate the domestic and foreign modular case of urban rail vehicle, to present the development direction of the interface module in the future of urban railway vehicle parts.