• Steel and Composite Structures
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• 제2권4호
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• pp.259-276
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• 2002

In the present investigation the experimental and theoretical flexural and compressive behavior of short tubular steel columns filled with plain concrete and fiber-reinforced concrete (FRC) was examined. For a given length of the members, the effects of different geometry and dimensions of the transverse cross-section (square and circular) were investigated. Constituent materials were characterized through direct tensile tests on steel coupons and through compressive and split tension tests on concrete cylinders. Load-axial shortening and load-deflection curves were recorded for unfilled and composite members. Finally, simplified expressions for the calculus of the load-deflection curves based on the cross-section analysis were given and the ultimate load of short columns was predicted.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.203-204
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• 2009

자기부상열차 궤도 시스템은 자기부상열차의 활하중을 직접적으로 받아, 거더에 전달시키는 구조로 가이드웨이에서 매우 중요한 요소이다. 프리캐스트 바닥판을 적용한 자기부상열차 가이드웨이 거더 개발의 한 과정으로 프리캐스트 바닥판-궤도 레일의 연결 시스템의 정적 및 피로실험을 수행하였다. 이 연구에서는 바닥판-궤도 레일 시스템의 구조적 특성을 상세 유한요소해석을 수행하여 수치적으로 평가하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2004년도 춘계학술발표회
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• pp.869-872
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• 2004

A study on the solidification of sludge by reactive amendment agent was carried out in this paper. The reactive amendment agent used in this study is mainly composed of inorganic solidification agent and reactive adsorptive material. The reactive agent has a function of soil-cement-agent solidification and harmlessness of contaminant in waste. The reactive agent is environmentally friendly material to the surrounding environment. In this study, a series of tests and experiments including unconfined compressive strength, permeability, pH test, constituent analysis, leaching test were carried out to analyse engineering and environmental characteristics of solidified sludge treated reactive agent. The result of this research shows that the solidified sludge treated reactive agent is increased in strength and decreased in contaminant concentration.

• 한국조리학회지
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• 제14권4호
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• pp.217-231
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• 2008

The purpose of this study is to examine how the perceived physical environments of hotel kitchens influence cooking employees' internal responses. According to the analysis results of this study, except Hypothesis 2 which was rejected in this study, all the hypotheses were partially accepted. These results support the research hypotheses of this study that comfort, spatiality, and convenience as physical environments will have significant effects on emotional response and cognitive response. Also, equipment use as convenience had statistically significant effects on both emotional response and cognitive response whereas working environment as comfort and kitchen circulation and working space as spatiality had no effect. Therefore, kitchen environment should be set up in the direction of guaranteeing kitchen convenience to the maximum, and the further researches on the constituent factors which have no effect on emotional response and cognitive response should be proceeded continuously.

• 한국의류학회지
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• 제22권7호
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• pp.882-891
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• 1998

This study purported to analyze the condition of the degree standardization and types of global ads. in the multinational fashion brand corporations. The analyzed ads. were sampled from monthly magazines on same seasons in 1997. This study was done by means of checklists were modified other researcher's research measurments. Researcher counted of advertising message. Zero point meant perfect stan-dardization and 13 points meant perfect non-standardization. The types of advertising appeal were analyzed according to constituent unit's expression types. The results of the study proved that the degree of standardization was considerably high, which means that the multinational fashion brand corporations used the standardization strategy. In particular, the degree of standardization in sports wear and casual wear ads. was low compared with the degree of standardization in the other ads. Most of the global fashion ads. were composed of illustrations only. Besides, emotional appeal type was usually used in glabal fashion ads.

• 대한음성학회:학술대회논문집
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• 대한음성학회 1996년도 10월 학술대회지
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• pp.208-213
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• 1996

This paper reports a preliminary investigation on the time course of intersyllabic coarticulation in Standard Chinese. In this investigation, around 3800 phonetically compact C1V1-C2V2 type disyllabic structures 3re employed to observe the acoustic effect of coarticulation in general, and about 400 disyllabic words are designed as the materials to examine: (1) How the articulators move from one syllable to the next？ (2) What is the extent to which the syllables overlapped？ And (3) In what sense, the syllables are produced in parallel; and in what sense, they are in sequence？ For the convenience of description, we just take the offset transition of V1 end the onset transition of C2 os the rough representations for anticipatory and carryover effect respectively, durational measurements are made correspondingly. To evaluate the possible influence on the behavior of gestural overlap from stress contrast and constituent difference of the syllables, analysis of variance are counducted as well. Based on this study, Some impressions about general nature of coarticulation behined the intersyllabic gesture overlapping in this language are discussed.

• The Korean Journal of Ceramics
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• 제4권3호
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• pp.199-203
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• 1998

$Pb(Zr, Ti)O_3$ (Pb:Zr:Ti=1:0.52:0.48) thin films were prepared on single crystal MgO(100) substrates by dipping-pyrolysis process using a solution of constituent metal naphthenates as starting materials. The solution was spin-coated onto substrate and the precursor films were pyrolyzed at $200^{\circ}C$ in air or at $200^{\circ}C$ in argon for 1, 2, 5 and 24h, followed by final heat treatment at $750^{\circ}C$. For all the films, highly (h00)/(00l)-oriented Pb$Pb(Zr, Ti)O_3$ thin films with smooth surfaces and crack-free were obtained, whereas thin film pyrolyzed in air for 24 h exhibited polycrystalline character. According to the pole-figure analysis, epitaxy of the product films was found to depend on pyrolysis atmosphere.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1696-1701
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• 2003

This paper deals with a vibration control analysis of a rotating composite blade, modeled as a tapered thinwalled beam induced by heat flux. The displayed results reveal that the thermally induced vibration yields a detrimental repercussions upon their dynamic responses. The blade consists of host graphite epoxy laminate with surface and spanwise distributed transversely isotropic (PZT-4) sensors and actuators. The controller is implemented via the negative velocity and displacement feedback control methodology, which prove to overcome the deleterious effect associated with the thermally induced vibration. The structure is modeled as a composite thin-walled beam incorporating a number of nonclassical features such as transverse shear, secondary warping, anisotropy of constituent materials, and rotary inertias.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 추계학술대회 논문집
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• pp.130-135
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• 2011

A study of the bending-extension-transverse shear coupled random response of the composite beams with thin-walled open sections subjected to various types of concentrated and distributed random excitations is dealt with in this paper. First of all, equations of motion of thin-walled composite H-type cross-section beams incorporating a number of nonclassical effects of transverse shear and primary and secondary warping, and anisotropy of constituent materials are derived. On the basis of derived equations of motion, analytical expressions for the displacement response of the composite beams are derived by using normal mode method combined with frequency response function method.

• 한국정밀공학회지
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• 제15권8호
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• pp.88-101
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• 1998

In this paper, module of a product is determined by the characteristics of a product itself and art assembly process. To analyze the characteristics o( the product, assembly function, structure of subassembly and parts could be considered. Based on the analysis of characteristics of product structure, assembly process and product function, determination criteria of a module could be proposed. For the assembly process, assembly methods, assembly equipment and workers could be considered. For the product structure, constituent object and structural feature could also be considered. To obtain the interrelationship between the product and the assembly process, the matrix table could be used to find the influencing factors that affected the module.