• 건축사
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• 통권503호
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• pp.12-12
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• 2011

• 건축사
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• 통권514호
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• pp.13-13
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• 2012

• Journal of Preventive Medicine and Public Health
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• 제54권5호
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• pp.380-381
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• 2021

• 건축사
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• 통권596호
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• pp.11-11
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• 2018

• 건축사
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• 통권601호
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• pp.108-109
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• 2019

• Bulletin of the Korean Chemical Society
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• 제28권10호
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• pp.1705-1708
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• 2007

Geometric manipulation of molecules is an essential elementary component in computational modeling programs for molecular structure, stability, dynamics, and design. The computational complexity of transformation of internal coordinates to Cartesian coordinates was discussed before.1 The use of rotation matrices was found to be slightly more efficient than that of quaternion although quaternion operators have been widely advertised for rotational operations, especially in molecular dynamics simulations of liquids where the orientation is a dynamical variable.2 The discussion on computational efficiency is extended here to a more general case in which bond angles and sidechain torsion angles are allowed to vary. The algorithm of Thompson3 is derived again in terms of quaternions as well as rotation matrices, and an algorithm with optimal efficiency is described. The algorithm based on rotation matrices is again found to be slightly more efficient than that based on quaternions.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.303-306
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• 2007

CWR(Continuous Welded Rail) and bridge interaction produce rail force, bridge displacement and rail/bridge relative displacement. Each of these has limitation by many codes. In this paper, analysis of interaction has been carried out by using foreign codes(UIC 774-3 R code of Europe etc.) because there is no code about interaction between rail and bridge in Korea. Recently, railway bridges with CWR has been constructed for structural and economical reasons. When designer plans railway bridges, design a bridge model first and then investigate railway forces and displacement by interaction analysis. If these results go out bounds from limitation, designer plans railway bridges again and again. In this paper, using the parametric study on CWR and railway bridge interaction, railway bridge parameters such as length of bridge span, area of bridge, moment of inertia, stiffness of pier, etc. are presented. It helps preliminary design of railway bridges.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.17-18
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• 2012

Moisture condensation leading to defects that occur repeatedly in the winter, and recognize the same method, the problem of the other buildings in the same area again and again, a vicious cycle that occurs due to the temporary lack of systematic research and processing way of coping has been recurring. In this study, as warming progresses, more inside the air-conditioned summer season due to an increase in the ambient temperature of the condensation phenomenon to happen about summer wall condensation phenomena are expected to analyze the case of a building to prevent condensation and for insulation designs are proposed.

• 벤처다이제스트
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• 통권62호
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• pp.20-21
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• 2004

극심한 경기 부진을 타개하기 위한 비장의 카드‘제2 벤처 붐’조성을 위해 협회는 그동안 벤처업계의 의견수렴 과정을 거쳐‘<다시 벤처다(Venture Again!)>’를 실행하기 위한 구체적인 10대 아젠다(agenda)를 마련했다. 그리고 지난 8일 은행회관에서 이헌재 경제부총리, 산업자원부 이희범 장관, 정보통신부 진대제 장관, 유관기관장 및 협회 회장단이 참석한 가운데 벤처기업 간담회가 열렸다. 이날 간담회에서 협회 장흥순 회장은 10대 아젠다를 설명했고, 정부는 이를 바탕으로 벤처 지원을 위한 특단의 대책을 마련한다는데 의견을 같이 했다. 특히 이헌재 부총리는“과거의 실패를 거울삼아 속도가 늦더라도 제대로 된 벤처를 해보자”며“내년에는 벤처가 다시 뛰는 원년이 되도록 하자”고 강조했다. 재정경제부ㆍ정보통신부 등 정부 각 부처는 벤처 재도약을 위해 분야별 태스크포스팀(TFT)를 결성, 연말까지 구체적인 벤처육성 대책안을 내놓을 계획이다. 이번 간담회는 최근 정부 부처 및 여당에서 일고 있는 벤처산업 재육성 의지를 재차 확인시켜주는 의미있는 자리였다. 다음은 협회 장흥순 회장이 발표한‘<다시 벤처다(Venture Again!)>’를 실행하기 위한 구체적인 10대 아젠다를 요약한 글이다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1996년도 추계학술대회 논문
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• pp.167-172
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• 1996

A Dual Mass Flywheel system is a evolution to the reduction of torsional vibration and impact noise occuring in powertrain when a vehicle is eit-her moving or idling. The name already explains what it is : The mass of the conventional single mass flywheel is divided. One section continues to belong to the mass moment of inertia of the engine-side. The ot-her section increass the mass moment of inertia of the transmission-side. The two masses are connected via a spring /damping system. This reduces the speed at which the dreaded resonance occurs to below idle speed. Since 1984 Dual Mass Flywheel has been de-veloped again and again. But the prosidures of de-velopment of D.M.F system didn't have had differe-nce from conventional clutch system's trial and err-or This paper presents the method for systematical design of D.M.F system with demensionless design variables of D.M.F system mass ratio between two flywheels λ. natual frequency rate of two flywheel s, ${\gamma}$and viscosity coefficient ζ. And experimental re-sults are used to prove these theoretical results.