• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.525-528
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• 2003

In recent, Information Technology(IT) is the biggest issue on the world at large including construction industry as core strategic means for reinforcing competitive power of company and nation and raising its effectiveness. However, CEO of each finn is deferring IT investment decision because there's no case to measure real value of IT and confidence to economic effect of information system. IT Evaluation will be so helpful that most construction finns make a plan of IT investment. and it is necessary to achieve their management goal and have the maximum of firm's value with the usage of IT system. Therefore, The purpose of this research is to promote the increase of IT investment and the improvement of the standard in IT with the development of IT evaluation system to be monitoring IT level continually.

• Korean Journal of Construction Engineering and Management
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• v.5 no.1 s.17
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• pp.88-98
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• 2004

In recent, Information Technology(IT) is the biggest issue on the social whole including the construction industry. IT is recognized as a key strategic means to reinforce competitive power and raise the effectiveness. However, CEOs of each firm have trouble with IT investment decision-making. Because there is neither any case to measure real value of IT nor any confidence to economic effect of information system. IT evaluation is so helpful for most construction firms to make a plan of IT investment. In addition, which will eventually facilitate to achieve their management goal and have the maximum of the firms' value. Therefore, the purpose of this research is to develop IT evaluation system for monitoring IT level continually. And this will be enable a construction company to increase IT investment and improve the level of IT in the construction industry.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.135-136
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• 2016

SUPER concrete poontoon is developed to overcome shortcomings about corrosion problem of steel pontoon and the insufficient freeboard line of concrete pontoon. Top slab of Pontoon resists truck load or sidewalk live load. The soffit slab and outer wall of Pontoon resist the horizontal and vertical components of wave pressure, and those were loaded along X and Y-axis of Pontoon. Global analysis for the Pontoon is carried out to design its cross-sections economically using a geometric non-linear time history analysis method by Strand7 and buoyance-stability calculated automatically on non-vertical boundary conditions. And the load-capacity of Pontoon is confirmed through mock-up tests.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.9
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• pp.3889-3894
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• 2012

The platform of railroad station for domestic passenger train has been operated at two categories like the platforms if low level(500mm, mainline) and high level(1,135mm, metropolitan subway line). To operate both metropolitan subway line and mainline railroad safely, it is essential to develop the doorstep equipment of railway vehicle regardless of low and high level platforms. On the other hand, the domestic test standard at durability and reliability of doorstep equipment has not been existed until now. This study aims at the development on doorstep equipment of telescopic sliding type for low and high level platforms. Durability analysis with VPD(Virtual Product Development) techniques are performed and the durability standard & qualification life through the rig test during no failure test time is examined in accordance with reliability qualification test.

• Proceedings of the Korea Society of Costume Conference
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• 2001.04a
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• pp.42-43
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• 2001

색상특성은 각 계열별로 차이가 있었으나 전반적 으로 고명도.저채도 중심으로 황색계열과 청색계열 은 고명도 위주의 분포특성을 보였다. 이어 반하여 적색계열은 비교적 색조의 영역이 넓었으며 고채도 의 분포특성이 두드러졌다. 자색계열은 저명도.중 채도, 녹색계열은 고명도.저채도 중심이었다. 남.녀복의 색조유형으로서 여복에서는 white보다는 tone 중심의 색조특성이 나타났으며. 남복에서는 white를 제외한 tint의 색조유형이 많았다. 이는 당시대인의 백색지향 의식을 대변하는 것으로 사료된다. 음양오행론의 배색원리에 의해 검토한 결과 여복 은 상생이 남복보다 낮게 집계되었으며, 반대로 파버 비렌의 색채조화의 배색원리에 의한 검토 철과는 남 복보다 여복의 적용수치가 높았다. 이것은 감각적인 색채조화 보다는 의례적인 성향이 좀 더 징한 남복이 서구의 색채조화의 척도에 적합하지 않은 결과로 추측된다. 전통복의 배색특성은 남녀가 매우 다른 양상을 보 이고 있었다. 여복의 기본 복식구조인 저고리/치마 는 백/청색계열, 백/황색계열과의 배색이 중심으로서 면적대비 및 명도대비에 의한 조화가 이루어지고 있었다. 반면에 저고리의 배색은 유채색과 백색계열 의 배색으로 채도대비의 성향이 강했다. 남복은 황/백색계열. 백/청색계열로 명도의 차가 크지 않았다. 포/띠의 의복 구성에 있어서는 흑색 또 는 적.자색 등의 세조대(細條帶)로 인해 채도대비, 면적대비, 명도대비의 배색효과를 찾아볼 수 있었다. 이상과 같은 분석결과를 통한 한국인의 색사용의 특정은 복식의 전면에 등장하는 백색지향과 음양오 행설을 그 배경으로 하고 있다. 백색위주의 색사용은 인공미가 배제된 자연미의 추구에 기인한 것으로 토착화된 한국의 색으로 볼 수 있다. 백색은 여러 색을 통합하고 배색된 색채착화된 한국의 색으로 볼 수 있다. 백색은 여러 색을 통합하고 배색된 색채들을 담하게 만드는 것이 특징 으로 한국전통 복식의 배색특성을 주도하고 있었다. 마지막으로 본 연구는 회화자료를 근거한 것으로 풍속화의 변색 및 탈색에 의해 당시대의 정확한 색채규명이 어려우며, 실물작품이 아닌 도판을 통한 측 색으로 색의 오차가 발생할 수 있음을 연구의 한계 점으로 언급하고자 한다.

• Journal of Korean Society of Steel Construction
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• v.12 no.3 s.46
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• pp.239-250
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• 2000

This study investigates the mechanical behavior on trough rib to crossbeam joint in orthotropic steel plate decks, specially emphasizing on the effect of diaphragm inside trough rib on the fatigue behavior of slit by static and fatigue tests. In particular, the effects of diaphragm on in-plane stress and out-of-plane stress, stress concentration, propagation of fatigue cracks at the silt are studied. With the result of experiment and numerical analysis, we have estimated the fatigue strength using the nominal stress and hot-sport stress. The details with diaphragm have occurred about 50% stress reduction at trough rib part of trough rib to crossbeam joint than the detail without diaphragm, however, the lower parts of crossbeam have occurred much more stress. Initial crack size or slit have an considerable influence on the propagation of fatigue cracks due to V-notch. The fatigue strength category of the details without diaphragm has higher value than fatigue limit, whereas that of the details with diaphragm is estimated lower than fatigue limit.

• Journal of Korean Society of Steel Construction
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• v.15 no.1
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• pp.25-31
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• 2003

This research aimed to experimentally and theoretically investigate the moment strength of deck plates. A moment experiment was carried out using a full-scale 14 specimen. To prevent local buckling, the point load was applied at 1/4 points. After the experiment, theoretical analysis was conducted and the differences between various codes were identified. The experimental results were compared with AISI (the American Iron and Steel Institute), EC (Euro Code) 3, and KS (Korea Standard) codes. Analysis results are summarized as follows: (1) the failure mode was influenced by local buckling at the midpoint of the beam and/or at the intermediate loading point: (2) if yielding first occurred at the tension side, the moment strength would increase as the plastic reservation of the tension zone acted: (3) the experimental results were closest to the EC3 codes in which the partial plastic reservation was considered; (4) statistical evaluation based on the EC3 Annex Z showed that the partial resistance safety coefficient calculated applying to the EC3 formula, $^{\circ}{_M}$, was placed within 1.1 which was the target value of EC3 code; and (5) the analytical power of AISI and KS codeswere expected to improve into the level of EC3 codes if the concept of plastic reservation of the tension side would be introduced to them.

• Journal of Korean Society of Steel Construction
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• v.18 no.4
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• pp.491-502
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• 2006

This paper summarizes full-scale test results on CFT column-to- flat plate connections has gained wide acceptance subjected to gravity loading. CFT construction has gained wide acceptance in a relatively short time in domestic building construction practice due to its various structural and construction advantages. However, efficient details for CFT column to flat plate connections have not been proposed yet. Based on the strategies that maximize economical field construction, several connecting schemes were proposed and tested. Test results showed strength and connection stiffness exceeding those of R/C flat p late counterparts. A semi-analytical procedure is presented to model the behavior of CFT column-to-flat plate connections. The five parameters to model elastic to post-punching catenary action range are calibrated based on the limited test data of t to progressive collapse prevention design is also illustrated.

• Journal of Korean Society of Steel Construction
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• v.25 no.5
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• pp.531-541
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• 2013

This paper investigated the structural capacity of the CT shear connectors, which is a kind of the perfobond rib and functions as an anchor transferring the tension force in the joint between a composite PHC wall pile and a bottom slab. The direct pull-out test was performed for various specimens. From failure modes and load-displacement curves, it was found that transverse rebars should be placed to holes in a web to restrict pull-out failure of CT shear connectors. The results of additional tests for specimens with transverse rebars and various support lengths indicated that all specimens were failed by the tension failure of PHC pile before pull-out failure of CT shear connector and concrete pull-out failure. Thus, the CT shear connector could endure the tension force between the PHC wall pile and the bottom slab.

• Journal of Science Education
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• v.41 no.3
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• pp.405-425
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• 2017

This study aimed to investigate the life and works of Robert Hooke, an ingenious scientist in the era of scientific revolution, and to give some implications of invention education for science education. The publications and critics of Robert Hooke were analyzed to find out the personal setbacks how he showed excellent performances across the fields of science. The research finding showed that he tried to make geometric and visualized reasoning based on the empirical phenomenon, had much interest in the devices and methods for measurement and observation in the experiment, and made technical devices by himself. The ingenuity of Robert Hooke could be revealed by the rich resources in his childhood, his talent of drawing for depiction, and his colleagues and teachers with favors of diverse fields of disciplines and empirical tradition. As well, it was likely that his monistic viewpoint between the reality and scientific theories, led himself to develop interesting instruments for scientific experiments. Thus, this study suggested some implications to combine invention education with science education.