LED Dimming 시 발생하는 고조파 연구

김용언(Yong-Eon Kim),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2019 한국조명·전기설비학회 학술대회논문집 Vol.2019 No.5

전력산업에서의 대·중소기업간 협력에 의한 신제품공동개발 메커니즘에 관한 연구

김용언(Kim, Yong-eon),신철호(Shin, Cheol-ho) 한국상품학회 2009 商品學硏究 Vol.27 No.1

본 연구는 기업간 협력에 의한 신제품개발 메커니즘을 정리하는 것을 목적으로 하였다. 신제품개발 메커니즘 도출은 후발기업이 선도기업과 유사한 메커니즘을 가진 프로세스를 거칠 경우 선도기업과 동일한 성과를 얻을 수 있거나 적어도 많은 시행착오를 줄일 수 있음을 의미한다. 연구 방법은 기업간 협력에 의해 세계적인 특허기술을 보유하며 고유의 브랜드로 국내외 시장을 확장하고 있는 사례에 대해서 8년여의 직접적인 관찰결과를 분석, 정리하였다. 분석방법은 ser-M 모델을 활용하여 세 가지 관점에서 접근하였다. 첫째 관점은 사업을 이끈 주체의 역할과 주체가 활용한 보유자원, 그리고 신제품 개발환경을 둘러싼 환경의 상호작용 등 메커니즘 형성요인이며 둘째 관점은, 성공요소와 각 요소들의 작동순서와 시점 등 메커니즘 구조와 원리이며, 마지막 관점으로 학습과 조정, 그리고 선택 등의 과정분석이다. 본 연구 결과는 신제품개발로 경쟁력을 강화하고자 하는 기업에게 기업간 협력의 중요성과 역량 구축과정, 기업 내부자원 공유나 협업 체제와 관련한 전략적 의사결정과 실행에 이해를 높일 것으로 평가된다. The objective of this paper is to define a new product development mechanism(NPD-M) underlying in cases of inter -firm cooperation of power plant industry. By defining a NPD-M, later firms(early movers) are able to achieve similar performances or reduce trial and errors during similar processes of former firms(followers). The methodology of this study is to record and analyze direct observation results for 8 years, of a single case which concerns the achievement of a world-class patent and deals with successful expansion in domestic and international markets using a unique brand. Analytical approaches were made in three perspectives based on the ser-M framework. The first perspective includes the mechanism-building factors which refer to the firm’s role of business, resources which were facilitated, and environmental interactions surrounding NPD. The second perspective concerns the mechanism’s principle and structure, such as success factors and the mechanical sequence and timing of those factors. The third perspective is the process analysis of the mechanism, which deals with the steps of learning, adjustment, and choice. It is expected that the results of this study will offer greater understanding over the importance of inter-firm cooperation and strategic decision making, which concern the process of building capabilities, sharing internal resources and cooperative structures.

영역/경계 분할 정식화에 의한 삼차원 접촉 해석의 효율성 검토

김용언,류한열,신의섭,Kim, Yong-Uhn,Ryu, Han-Yeol,Shin, Eui-Sup 한국전산구조공학회 2007 한국전산구조공학회논문집 Vol.20 No.4

많은 계산량이 요구되는 삼차원 접촉 문제의 효율적인 유한요소 해석을 위하여 영역/경계 분할 기법을 적용하였다. 접촉 경계면의 부등식 적합 조건과 부영역, 공유면, 접촉 공유면의 등식 적합 조건을 모두 벌칙 함수로 처리하였다. 이에 따라 모든 유효 강성 행렬이 양 정치화되므로, 역행렬과 같은 각종 행렬 연산이 매우 간편해진다. 또한 전체 영역의 형상이 복잡하더라도, 임의의 부영역, 공유면, 접촉 공유면 단위로 쉽게 유한요소 모델링할 수 있다. 즉, 관련 지배 방정식은 물론 경계 조건도 독립적으로 이산화할 수 있으므로, 국부적인 비선형 접촉 조건에 대한 효율적인 해석이 가능하다. 간단한 수치 예제를 통하여 삼차원 접촉 해석의 효율성에 관한 기본적인 경향을 검토하였다. A domain/boundary decomposition technique is applied to carry out efficient finite element analyses of 3-D contact problems. Appropriate penalty functions are selected for connecting an interface and contact interfaces with neighboring subdomains that satisfy continuity constraints. As a consequence, all the effective stiffness matrices have positive definiteness, and computational efficiency can be improved to a considerable degree. If necessary, any complex-shaped 3-D domain can be divided into several simple-shaped subdomains without considering the conformity of meshes along the interface. With a set of numerical examples, the basic characteristics of computational efficiency are investigated carefully.

제2부 제초제 및 잡초방제 분야 : Fenoxaprop - P - ethyl ( 푸로레 ) 단제 및 Bentazon 혼합제의 벼 후기 경엽처리에 따른 상호작용에 미치는 요인

박지성,김용언,김길웅 ( J . S . Park,Y . S . Kim,K . U . Kim ) 한국잡초학회 1995 한국잡초학회 별책(학술대회 초록집) Vol.15 No.2

전력회사의 목표 원가제를 중심으로 한 전략적 응용에 관한 연구

전태유(Chun Tae-Yoo),김용언(Kim Yong-Eon) 한국문화산업학회 2005 문화산업연구 Vol.5 No.2

To maintain power generation companies market share in new business environment, they should build many power plants and for competition's sake reduce construction costs which account for 41.1% of the price of electricity generation. Adopting the target costing should improve the power company's competitiveness, help extend market share and facilitate construction of future power plants. This thesis based on target costing theory and case study of Nissan motors. A target costing system sets cost targets by subtracting the required profit margin from the competitive market price. Although building a power plant is more complex, requiring huge project costs and extensive development periods, the business procedure is quite similar to that of other product industries. Power generation companies' target costing will process in two phases same as Nissan motor case. Despite some limitations of this study, target costing offers a pretty useful means for overseas project bidding stages, wherein the target costs prepared before bidding based on plant types allow for a rapid diversification of strategies. Adopting the target costing approach should prove highly useful for implementing the necessary program. It should improve the power company's competitiveness, help extend market share and facilitate construction of future power plants. To maintain power generation companies market share in new business environment, they should build many power plants and for competition's sake reduce construction costs which account for 41.1% of the price of electricity generation. Adopting the target costing should improve the power company's competitiveness, help extend market share and facilitate construction of future power plants. This thesis based on target costing theory and case study of Nissan motors. A target costing system sets cost targets by subtracting the required profit margin from the competitive market price. Although building a power plant is more complex, requiring huge project costs and extensive development periods, the business procedure is quite similar to that of other product industries. Power generation companies' target costing will process in two phases same as Nissan motor case. Despite some limitations of this study, target costing offers a pretty useful means for overseas project bidding stages, wherein the target costs prepared before bidding based on plant types allow for a rapid diversification of strategies. Adopting the target costing approach should prove highly useful for implementing the necessary program. It should improve the power company's competitiveness, help extend market share and facilitate construction of future power plants.

영역 및 복사 경계의 완전 분할을 통한 유한요소 열전달 해석의 효율화

신의섭(Eui Sup Shin),김용언(Yong Uhn Kim),김성준(Sung Jun Kim) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.10

An efficient domain/boundary decomposition method is applied for heat transfer problems with non-linear thermal radiation boundaries. The whole domain of solids or structures is considered as a set of subdomains, an interface, and radiation interfaces. In a variational formulation, simple penalty functions are introduced to connect an interface or radiation interfaces with neighboring subdomains that satisfy continuity conditions. As a result, non-linear finite element computations due to the thermal radiation boundaries can be localized within a few subdomains or radiation interfaces. Therefore, by setting up suitable solution algorithms for the governing finite element equations, the computational efficiency can be improved considerably. Through a set of numerical examples, these distinguishing characteristics of the present method are investigated in detail.

전면벽체 강성에 따른 그린월 시스템의 안정성 평가

박시삼(Park Si-Sam),김홍택(Kim Hong-Taek),김승욱(Kim Seung-Wook),김용언(Kim Yong-Eon) 한국토목섬유학회 2006 한국지반신소재학회 논문집 Vol.5 No.3

그린월 공법은 독립식 콘크리트 보형식의 옹벽으로, 전, 후면 가로보와 세로 방향으로 버팀보를 연속적으로 쌓아 올려 내부에 다짐성토를 시행함으로써 구조체가 일체 거동하도록 강성벽체(rigid body)를 형성시키는 옹벽 구조물이다. 최근의 그린월공사는 원지반 절취량을 최소화 할 수 있다는 장점으로 절토 공사현장에 다양하게 적용되고 있으며, 주로 앵커 및 쏘일네일 등과 함께 시공하는 추세이다. 이처럼 그린월과 함께 쏘일네일이 시공되는 경우에는 전면벽체의 강성이 크기 때문에 연성전면벽체의 경우 보다 전체 시스템의 안정성 증대가 예상되나 실제 설계에서는 이를 반영하지 않고 쏘일네일만 설계하므로 비경제적인 요소가 많은 실정이다. 따라서 본 연구에서는 그린월과 같은 강성전면벽체와 쏘일네일 공법이 함께 시공되는 경우에 대하여 강성전면벽체로 인한 전체 시스템의 안정성 증대효과를 평가해 보았다. 본 연구에서는 전면벽체의 강성변화에 따른 전체 시스템의 안정성 증대효과를 평가하기 위하여 실내모형실험을 수행하였으며, 한계평형해석을 시행하여 그린월과 같은 전면벽체의 강성이 전체 활동에 대한 안전율에 미치는 영향을 평가하였다. The Green Wall system is one of segmental concrete crib type earth retaining wall. Green wall is constructed as procedures that lay the front stretchers, rear stretchers and headers then making a rigid body through harden filled soil of interior cell. Recently, Green Wall method is applied in variable cutting ground construction because of advantage which minimize to cut base ground. In case of Green Wall method is constructed with soil nail method, expect that total system stability will increase more than flexible facing because of facing stiffness is big. However, in this case of design, facing stiffness is not considered so that is poor economy. Hence, in this study, stability increasing effect of total system analyze about that soil nail method is constructed with rigidity facing like a Green Wall method. In present study, laboratory model tests was performed for analysis on stability increasing effect of total system about changing stiffness of facing. LEM analysis conducted for evaluation on safety factor of total system sliding that facing condition changed.

METABOLISM OF C<SUP>14</SUP>-GLUCOSE BY EURYTREMA PANCREATICUM

Byong Seol Seo(徐丙卨),Han Jong Rim(林漢鍾),Kwang Soo Kim(金光洙),Myun Sang Lee(李冕相),Yeong Uhm Kim(金容彦),Hi Yong Song(宋熙用) 대한기생충학열대의학회 1964 The Korean Journal of Parasitology Vol.2 No.3

외측상과염 침 치료의 혈위 선택에 대한 예비연구

박지훈(Ji Hun Park),이현준(Hyun Joon Lee),김용언(Yong Eon Kim) 대한스포츠한의학회 2012 대한스포츠한의학회지 Vol.12 No.1

Objectives Acupuncture is well-known to good alleviation of pain. The purpose of this paper is to establish theoretical base upon which to choose acupoints in acupuncture therapy for lateral epicondylitis. Methods NML Medline(pubmed), KISTI(Korea Institute of Science and Technology Information), OASIS(Oriental Medical Advanced Searched Integrated System) were searched for clinical trials investigating the efficacy of acupuncture on treatment of lateral epicondylitis or tennis elbow from 1990 to 2011. We checked frequency of all acupoints and matched up to anatomical structure. Results 1. Most frequently used acupoints are LI10, LI11, LI4, LI12, TW5, LU5. 2. Base designed acupoints are L10, L11, LI4, and extensor carpi radialis longus problem can relate with L12, biceps brachii problem can relate with LU5, distal radio-ulnar joint problem relate with TW5. Conclusions These result suggest that the treatment using acupoints of lateral epicondylitis can choose by classification in anatomic pathology.

Ether 및 Methoxyflurane 전신흡입(全身吸入) 마취(麻醉)가 가토(家兎)의 혈당량(血糖量)에 미치는 영향(影響)

박노삼(Park, Ro-Sam),최성구(Choi, Sung-Ku),김용언(Kim, Yong-Eon),권득기(Kwon, Duck-Kee),김영기(Kim, Young-Ki) 대한생리학회 1974 대한생리학회지 Vol.8 No.1

정상가토(正常家兎)에 ether와 methoxyflurane으로서 흡입마취(吸入麻醉)시킨 후(後) 마취(麻醉)의 심도(深度)와 시간경과(時間經過)에 따른 각기혈당량(各其血糖量)을 측정(測定)하고 대조군(對照群)의 그것과 비교(比較)한 결과(結果) 다음의 결론(結論)을 얻었다. 1. 대조군(對照群)의 혈당량(血糖量)은 112.04±9.88 mg%이었다. 2. Ether 마취군(麻醉群)에서, 경마취시(輕麻醉時) 혈당치(血糖値)는 193.57±2.40 mg%로서 증가(增加)하였다. 심마취즉후(深麻醉卽後)에는 혈당치(血糖値)가 130.75±5.33mg%로서 다시 저하(低下)되었다. 심마취시간(深麻醉時間)의 경과(經過)에 따라 혈당치(血糖値)는 계속 상승(上昇)하여 심마취(深麻醉) 120분(分)에서는 188.61±12.33mg%에 달(達) 하였다. 3. Methoxyflurane 마취군(麻醉群)에서는 ether 마취군(麻醉群)과 유사(類似)하게 혈당치(血糖値)의 증가양상상(增加樣狀相) 보여 주었고 methoxyflurane 경마취시(輕麻醉時)의 혈당치(血糖値)는 186.89±10.90mg%였다. 심마취즉후(深麻醉卽後)에는 111.28±16.81mg%로 저하(低下)되었다가 시간(時間)의 경과(經過)에 따라 상승(上昇)하여 120분(分)에서는 208.98±7.52mg%로서 상당히 상승(上昇)하였다. 4. 이상(以上)의 결과(結果)로서 ether와 methoxyflurane 마취시(麻醉時) 혈당치(血糖値)의 변동(變動)은 시간경과(時間經過)에 따라 유사(類似)한 결과(結果)를 얻었다. In the present study, the experiment was made to observe the change of the blood sugar levels in the process of general anesthesia, subjecting the rabbits to the light or deep inhalation anesthesia with ether or methoxyflurane by the non-rebreathing system. The blood sugar level was measured by the method of Somogyi and Nelson. The results are summarized as follows; 1. The blood sugar level of the normal rabbit was 112. 04±9.88 mg%. 2. The blood sugar level in the initial stage of the light ether anesthesia was significantly increased, and slight decrease was observed in the beginning of the deep anesthesia. 3. In the ether anesthesia group, the sugar level increased gradually when deep anesthesia was induced. 4. Anesthesia with methoxyflurane produced a similar pattern of the blood sugar as in the ether group, with no significant difference between ether and methoxyflurane anesthesia.