• Title/Summary/Keyword: structure

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Analysis of Consciousness Structure R&D Project Evaluation (연구개발 프로젝트 평가에 대한 의식구조분석)

  • 김성희;김정자
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.25 no.4
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    • pp.61-68
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    • 2002
  • This paper provides a method of consciousness structure analysis for research and development project evaluation using fuzzy structure modeling(FSM). Fuzzy structure modeling, which is a modeling method for consciousness structure, has a large number of pairwise comparison by human subjective judgement and is difficult to check the consistency index of denoting the precision for human judgement. Thus, in this paper, we analyzed the structure of consciousness by fuzzy structural modeling method, introducing the concept of pairwise comparison matrix in Analytic Hierarchy Process.

Structural Behavior of Composite Slab toNuclear Power Structure under Reversed Cyclic Loads (반복하중을 받는 원자력 구조물 합성 바닥판의 구조적 거동)

  • 김정혁;김강식;김우범;정하선;이광수;신성우
    • Proceedings of the Korea Concrete Institute Conference
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    • 2000.04a
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    • pp.629-634
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    • 2000
  • Comparing with single structure constructed with reinforced concrete or steel, composite structures have a great advantage. However, in case of nuclear power structure, the application of a conventional single structure (reinforced concrete or steel structure) inflicts a heavy loss on a economical and constructive efficiency. But, the application of composite slab to nuclear power structure could compensate these deficiency. Therefore, in this study, the structural behavior of composite slab in nuclear power structure is observed to assure economical and constructive efficiency.

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Properties of Thermal Conductivity of Cement Mortar for Apartment Housing Floor Using Combined Strengthening Method (공동주택 바닥용 시멘트 모르타르의 복합강화법 변화에 따른 열전도 특성)

  • 윤길봉;전충근;정성철;윤기원;한천구
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.05a
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    • pp.243-248
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    • 2001
  • The objective of this study is to investigate the thermal conductivity of cement mortar for apartment housing floor using expansive admixture, copper fiber, cower lathe, hollowed aluminum plate. According to test results, temperature at point (a) located above heating pipe does not show significant variation with age, and temperature at (b), which is located at the finishing surface above heating pipe, and temperature at (c), which is located at center surface between heating pipe has remarkable change. Temperature distribution sat (b) are in order for, structure containing copper fiber>plain structure>structure containing hollowed aluminum plate>structure containing expansive admixture. Temperature distribution, shows high tendency in order for, structure containing copper fiber>structure containing copper lathe>structure containing hollowed aluminum plate>plain structure>structure containing expansive admixture. (a) estimation of temperature distribution is determined with the variation of temperature between (b) point and (c) point during 60 minutes heating.

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Research on Buried Depth Dependent Characteristics of Potential Rise for Structure (구조물 전위상승의 매설깊이 의존특성에 관한 연구)

  • Gil, Hyoung-Jun;Kim, Hyang-Kon;Kim, Dong-Ook;Choi, Chung-Seog
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.56 no.2
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    • pp.104-108
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    • 2007
  • This paper deals with an approach to the reduction of potential rise according to the buried depth of structure. In order to analyze the surface potential rise of structure, an electrolytic tank which simulates the semi-infinite earth has been used. The potential rise has been measured and analyzed for types of structure using an electrolytic tank experimental apparatus in real time. The structure models were designed through reducing real buildings and fabricated with four types on a scale of one-one hundred sixty. When a test current flowed through structure models, potential gradient was the highest value in case of the outline frame type(structure model A). The distributions of surface potential rise are dependent on the resistivity and absorption percentage in concrete attached to structure model.

ON GENERALIZED FINSLER STRUCTURES WITH A VANISHING hυ-TORSION

  • Ichijyo, Yoshihiro;Lee, Il-Yong;Park, Hong-Suh
    • Journal of the Korean Mathematical Society
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    • v.41 no.2
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    • pp.369-378
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    • 2004
  • A canonical Finsler connection Nr is defined by a generalized Finsler structure called a (G, N)-structure, where G is a generalized Finsler metric and N is a nonlinear connection given in a differentiable manifold, respectively. If NT is linear, then the(G, N)-structure has a linearity in a sense and is called Berwaldian. In the present paper, we discuss what it means that NT is with a vanishing hv-torsion: ${P^{i}}\;_{jk}\;=\;0$ and introduce the notion of a stronger type for linearity of a (G, N)-structure. For important examples, we finally investigate the cases of a Finsler manifold and a Rizza manifold.

A Study on the Derivation of Bracket Structure Terminology in Yingzaofashi in the Era of Song Dynasty (송대(宋代) ${\ll}$영조법식(營造法式)${\gg}$ 대목작(大木作) 포작(鋪作) 관련용어의 파생에 관한 연구)

  • Kim, Jae-Ung
    • Journal of architectural history
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    • v.20 no.2
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    • pp.55-70
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    • 2011
  • This paper aimed at analyzing of structural carpentry terminology for bracket structure in Yingzaofashi ${\ll}$營造法式${\gg}$in the era of Song Dynasty and illuminating coinage characteristics and method of Structural Carpentry Terminology for bracket Structure through graphonomy research and system and structure of these terms. The results are as follow. The structural carpentry terminologies for structure were identified to be approximately 23 words, and terminology of bracket structure鋪作 is largely categorized into 3 categories of Type鋪作次序, Structure, Place. On the other hand, the structural carpentry terminologies for parts largely categorized into 2 categories of Bracket structure鋪作, Others. Bracket structure terminologies for parts were derived from the core of Dou枓, Gong栱, Ang昂, Fang方. The phenomena of derivation in structural carpentry terminology for bracket structure can be explained by the difference in the shape of subsidiary material and the location for usage of the subsidiary material and part of the subsidiary material and their functions.

Performance Evaluation of the Underwater Structure which used a Epoxy Panel (에폭시 섬유판넬을 이용한 수중구조물의 단면보수시스템에 대한 성능평가)

  • 박준명;홍성남;박선규
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.11a
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    • pp.343-346
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    • 2003
  • Confirmation of a damage degree and repair about a damage part are very hard for an underwater structure. And quality control of a construction is very complicated even if repair work is carried out on a damaged structure because repair work is carried out in water. If repair work is carried out while a defect part of the structure which there is in water keeps dry state, a efficient of repair is maximized. However, as for the repair technology about an underwater structure, a systematic researcher is not enough because of the environmental trouble. And, as for the effect about repair method to be applied to a currently underwater structure, it is not certainly proved. In this study The repair work of an underwater structure damaged applied the method that used a fiber panel form work. And a efficient of structure repaired was evaluated.

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New PDP cell structure for high luminous efficacy with low voltage driving

  • Jung, Hae-Yoon;Kim, Tae-Jun;Whang, Ki-Woong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.480-484
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    • 2006
  • We propose a new PDP cell structure named DIDE (Dual Ignition Discharge Electrodes) structure with a long electrode gap to realize a high luminous efficacy. Suggested DIDE structure basically has a long electrode gap $(200{\mu}m{\sim}400{\mu}m)$, nevertheless, because of auxiliary electrodes formed on the front panel, can be driven at relatively low voltage. The discharge characteristic of DIDE structure was much different from that of conventional structure, which was analyzed by IR emission images using IICCD (Image Intensified Charge Coupled Device). The study can explain some particular characteristics of DIDE structure. As a result, the long electrode gap and low voltage effect can be expected in DIDE structure, and a very high luminous efficacy of 7.5 lm/W has been achieved in monochrome green test panel adopting the new cell structure with Ne-Xe (12%) mixture at 400 torr.

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Motion Analysis of a Very Large Floating Structure in Irregular Waves (불규칙파 중 초대형 부유식 해양 구조물에 대한 운동 해석)

  • 신현경;이호영;임춘규;신현수;박인규
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2000.04a
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    • pp.63-68
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    • 2000
  • A very large floating structure has rather small motion characteristics as to the whole body, while the motion at end part of such structure becomes largest due to the elastic motion of the structure. This paper presents on the theoretical result on the relative motion characteristics and green water phenomena of VLFS in waves This phenomena affect not only to strength of the structure but also the determination of depth of structure. To predict motion responses of structure in regular waves, the source-dipole distribution method and F.E.M is used By irregular wave results, the probability of occurrence of green water and response of the structure were calculated.

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Centrifuge Model Test and Numerical Analysis on Coastal Structure (안벽구조물에 대한 Centrifuge 모형실험과 수치해석)

  • Yoo, Nam-Jae;Kim, Dong-Gun;Jeon, Sang-Hyun
    • Journal of Industrial Technology
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    • v.29 no.B
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    • pp.65-72
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    • 2009
  • In this paper centrifuge model tests and numerical analysis on the coastal structure on the marine deposits of sand were performed to investigate the behavior of structure and foundation under the condition of wave action in field. In centrifuge model experiments, construction sequence of coastal structure such as preparation of sand deposit, excavation replacement, rubble mound with crushed stones and installment of coastal structure was reconstructed and the behavior of ground settlement during stage of construction was observed during tests. For the final stage of simulating the horizontal movement of coastal structure due to wave force, horizontal load was applied by horizontal loading apparatus being specially designed so that horizontal displacement of structure could be observed. Numerical analysis were also carried out and its results were compared with test results to assess the property of centrifuge mode experiments with respect to the behavior of structure as well as ground.

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