난지형 마늘의 농업수리학적 재배적지 분류

김용완,홍석영,김이현,장민원,Kim, Yong Wan,Hong, Suk Young,Kim, Yi Hyun,Jang, Min Won 한국농공학회 2012 한국농공학회논문집 Vol.54 No.6

This study carried out farmland suitability analysis for southern-type garlic cultivation considering soil and temperature as well as water deficit conditions. The spatial extent was limited within the area derived by Kim et al. (2012) using just soil and temperature constraints. Daily soil moisture was simulated using a one-layer soil water balance model at a $100{\times}100m$ grid unit, and then annual water deficit was calculated from 2000 to 2010. The farmland suitability was classified as four steps: best suitable, suitable, possible, and low productive. As a result, total area of best suitable or suitable farmland was about 375,900 ha, and Gimje-si and Haenam-gun were appeared as the largest favorable area for southern-type garlic cultivation. The best suitable or suitable area at Haenam-gun, Goheung-gun, Shinan-gun, Namhae-gun, and Muan-gun, major production regions of southern-type garlic, were extracted as 20,187 ha, 13,018 ha, 4,715 ha, 1,319 ha, and 349 ha, respectively. On the other hand, the result showed that the adoption of sprinkler irrigation systems might be critical in cultivating the southern-type garlic at some regions having poor water balance.

경사기둥을 포함한 철골모멘트 골조 및 접합부의 성능평가

김용완,김태진,김종호,Kim, Yong-Wan,Kim, Taejin,Kim, Jongho 한국전산구조공학회 2013 한국전산구조공학회논문집 Vol.26 No.3

최근 진행되고 있는 건축 프로젝트는 기존의 정형적인 구조계획에서 벗어나 점차 복합적이고 다양한 형태를 지향하고 있다. 이와 같은 새로운 건축 트렌드 속에서, 비정형 건축물의 구조 시스템을 효율적으로 현실화하여 골조의 직교성을 해체시키는 기술에 대한 연구의 필요성이 대두되고 있다. 비정형 건축물의 중요한 구조적 특징 중 하나로 경사기둥의 빈번한 적용을 들 수 있다. 경사기둥은 접합된 보에 추가적으로 모멘트와 축력을 전달하므로, 이러한 현상이 골조 및 보-기둥 접합부의 거동에 어떠한 영향을 미치는지를 실험 혹은 해석을 통해 검증할 필요가 있다. 그러나 수직기둥-보 접합부에 비하면 경사기둥-보 접합부에 대한 연구는 현재까지 충분한 연구가 이루어지지 않고 있는 실정이다. 따라서 본 연구에서는 비선형해석 및 유한요소해석을 사용하여 경사기둥을 포함한 보-기둥 접합부의 성능을 평가하였다. 경사기둥을 포함한 철골모멘트 골조의 비선형정적해석을 통하여 골조 전체의 거동을 분석하였고, 경사기둥-보 접합부 모델의 유한요소해석을 통해 좌굴거동 및 취성파단 잠재성을 검토하였다. The building design projects which are being proceeded nowadays pursue a complex and various shape of structures, escaping from the traditional and regular shape of buildings. In this new trend of the architecture, there rises a demand of the research in the structural engineering for the effective realization of such complex-shaped buildings which disassembles the orthogonality of frames. As a distinguished characteristics of the buildings in a complex-shape, there frequently are inclined columns included in the structural frame. The inclined column causes extra axial force and bending moment at the beam-column connection so it is necessary to assess those effects on the structural behavior of the frame and the connection by experiment or analysis. However, with comparing to the studies on the normal beam-column connections, the inclined column connections have not been studied sufficiently. Therefore, this study evaluated the beam-column connections having an inclined column using nonlinear and finite element analysis method. In this paper, steel moment frames having inclined columns were analyzed by the nonlinear pushover analysis to check the global behavior and beam-column connection models were analyzed by the finite element analysis to check the buckling behavior and the fracture potentials.

초고온가스로를 이용한 원자력수소생산 기술개발

김용완,김응선,이기영,김민환,Kim, Yong-Wan,Kim, Eung-Seon,Lee, Ki-yooung,Kim, Min-hwan 대한기계학회 2015 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.3 No.4

미래에너지의 해법으로 원자력에너지를 이용한 물분해 수소생산시스템의 핵심기술을 개발하였다. 안전성을 보장할 수 있는 제4세대 원자로인 초고온가스로의 고열을 이용하여 황요오드 열화학적인 방법으로 물을 분해하여 수소를 생산하는 기술이다. 원자력수소생산 핵심기술은 초고온에서의 열을 공급하는 것을 모사하는 초고온 실험기술, 초고온가스로의 안전성을 모사하는 연구, 초고온가스로의 노심과 안전성을 해석할 수 있는 도구의 개발, 초고온가스로에 사용하는 연료제조기술, 물을 분해하여 열화학적인 방법으로 수소를 생산하는 기술로 구성된다. 원자력수소생산에 필요한 핵심기술을 개발하고 실험실 규모로 입증하였으며, 대규모 실용화를 위해서 선결되어할 미완성 기술을 제시하였다. 본 기술은 제4세대 원자로개발 국제공동연구로 수행한 기술로서 향후 미래의 원자로 기술이다. Nuclear hydrogen production technology is being developed for the future energy supply system. The sulfur-iodine thermo-chemical hydrogen production process directly splits water by using of the heat generated from very high temperature gas-cooled reactor, a typical Generation IV nuclear system. Nuclear hydrogen key technologies are composed of VHTR simulation technology at elevated temperature, computational tools, TRISO fuel, and sulfur iodine hydrogen production technology. Key technology for nuclear hydrogen production system were developed and demonstrated in a laboratory scale test facility. Technical challenges for the commercial hydrogen production system were discussed.

인쇄기판형열교환기 핵심치수 구조설계

김용완,강지호,사인진,김응선,Kim, Yong Wan,Kang, Ji Ho,Sah, In Jin,Kim, Eung Seon 한국압력기기공학회 2018 한국압력기기공학회 논문집 Vol.14 No.1

The mechanical design procedure is studied for the PCHE(printed circuit heat exchanger) with electrochemical etched flow channels. The effective heat transfer plates of PCHE are assembled by diffusion bonding to make a module. PCHE is widely used for industrial applications due to its compactness, cost efficiency, and serviceability at high pressure and/or temperature conditions. The limitations and technical barriers of PCHE are investigated for application to nuclear components. Rules for design and fabrication of PCHE are specified in ASME Section VIII but not in ASME Section III of nuclear components. Therefore, the calculation procedure of key dimensions of PCHE is defined based on ASME section VIII. The effective heat transfer region of PCHE is defined by several key dimensions such as the flow channel radius, edge width, wall thickness, and ridge width. The mechanical design procedure of key dimensions was incorporated into a program for easy use in the PCHE design. The effect of assumptions used in the key dimension calculation on stress values is numerically investigated. A comparative analysis is done by comparing finite element analysis results for the semi-circular flow channels with the formula based sizing calculation assuming rectangular cross sections.

미흡한 과학기술 투자보전위해 정부ㆍ 업계 과학기술계 삼립일체 이루자

김용완,Kim, Yong-Wan 한국과학기술단체총연합회 1976 과학과 기술 Vol.9 No.10

마늘 재배적지분석을 위한 기온자료 공간보간기법 비교

김용완,홍석영,장민원,Kim, Yong-Wan,Hong, Suk-Young,Jang, Min-Won 한국농공학회 2011 한국농공학회논문집 Vol.53 No.5

The objective of this study is to decide a spatial interpolation method on temperature data for the suitability analysis of garlic cultivation. In Korea, garlic is the second most cultivated condiment vegetable after red pepper. Nowadays warm-temperate garlic faces potential shift of its arable area according to warmer temperature in the Korean Peninsula, and the change can be drawn with the precise temperature map derived from interpolation on point-measured data. To find the preferable interpolation method in cases of germination and vegetative period of the garlic, different approaches were tested as follows: Inverse Distance Weighted (IDW), Spline, Ordinary Kriging (OK), and Universal Kriging (UK). As a result, IDW and UK show the lowest root mean square errors as for the germination and vegetative seasons, respectively. However, statistically significant difference was not revealed among the applied methods regarding the germinating period. Eventually this will contribute to mapping the suitable lands for the cultivation of warm-temperate garlic reasonably.

VHTR 초고온기기 설계특성 분석

김용완,김응선,Kim, Yong Wan,Kim, Eung Seon 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1

The operating temperature of VHTR components is much higher than that of conventional PWR due to high core outlet temperature of VHTR. Material requirements and technical issues of VHTR reactor components which are mainly dominated by high temperature service condition were discussed. The codification effort for high temperature material and design methodology are explained. The design class for VHTR components are classified as class A or B according to the recent ASME high temperature reactor design code. A separation of thermal boundary and pressure boundary is used for VHTR components as an elevated design solution. Key design characteristics for reactor pressure vessel, control rod, reactor internals, graphite reflector, circulator and intermediate heat exchanger were analysed. Thermo-mechanical analysis of the process heat exchanger, which was manufactured for test, is presented as an analysis example.

구역전기사업자 전력구입 및 판매

김용완,Kim, Yong-Wan 대한전기협회 2005 전기저널 Vol.348 No.-

순환식 수경재배에서 재사용 양액에 대한 플라즈마 처리의 적용 가능성 조사

김용완(Yong Wan Kim),이승원(Seung Won Lee),최영배(Young Bae Choi),신종화(Jong Hwa Shin) 한국원예학회 2016 한국원예학회 학술발표요지 Vol.2016 No.10

블루스 음악의 즉흥연주법에 대한 연구 ╶ 래리 칼튼, 스캇 핸더슨 연주를 중심으로╶

김용완(Yong Wan Kim) 경희대학교 산학협력단 예술디자인연구원 2020 예술· 디자인학연구 Vol.23 No.1

현대 실용음악의 뿌리는 미국 흑인음악에서 파생된음악이 주류를 이룬다. 초창기 흑인음악이라 할 수있는 음악은 블루스(Blues)이며 이후 많은 발전을 걸쳐 재즈(Jazz), 로큰롤(Rock’n Roll), 소울(Soul) 등여러 음악에 모태가 된다. 이렇듯 블루스 음악은 현실용음악에서 중요한 위치를 차지하고 있으며 빼놓을 수 없는 음악이다. 현대 실용음악에서 연주되는 재즈는 블루스를 기초하고 있으며 즉흥연주의 특징을 포함하고 있다. 또한래리 칼튼(Larry Carlton)과 스캇 핸더슨(Scott Hend erson)은 재즈 음악에서 많은 영향력을 보인 뮤지션으로써 이들의 블루스 즉흥연주법에 관한 연구는 재즈 뮤지션들에게 하나의 방향성을 제시하고 재즈음악발전에도 필요한 자료가 될 것으로 사료된다. The roots of modern Applied Music are mainly composed of music derived from Black Music (African-American Music). Blues could be considered as the early African-American Music. Since then, African-American Music has developed a lot, and it has been a matrix of various music such as Jazz, Rock’n Roll, and Soul. Likewise, Blues Music has an important place in modern Applied Music and is indispensable. Jazz, played in modern Applied Music, is based on Blues and includes features of improvisation. Also, Larry Carlton and Scott Henderson are musicians who have exerted their influence to Jazz Music, and their studies on improvisation of Blues suggest a direction for Jazz musicians and are regarded as an important reference for the development of Jazz Music.