• 대한가정학회지
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• 제40권5호
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• pp.119-132
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• 2002

The purposes of this study were 1) to classify female consumers on VALS, 2) to identify the differences of psychological characteristics and demographics among the classified groups, and 3) to investigate the apparel benefits, buying behavior, shopping practices and psychological characteristics of each groups. For the study, a sample of 340 female consumers participated in this survey research. The data was analyzed utilizing descriptive statistics, factor analysis, cluster analysis, $\chi^2$-test, one-way ANOVA and Duncan test. Seven dimensions of values were identified by factor analysis: Consumption-oriented, Achievement-oriented , Diligence/sincerity-oriented, Pessimistic value tendencious, conservative/conventional value oriented, Dignity-oriented and Socialite-oriented. Based on these dimensions female consumers classified into three clusters: inner values-directed group, passive/inactive group, and achievement-oriented group. Achievement-oriented group showed the highest scores in optimum stimulation level and materialism, and tended to be younger and be employed than the other two groups. Both inner values-directed group and achievement-oriented group showed higher scores in self-expression/individuality and quality out of five apparel benefit than passive/inactive group. Innovative communicators, fashion innovators and fashion opinion leaders were mostly in the achievement-oriented group, while fashion followers and fashion indifferents were mostly in the passive/inactive group. It was revealed that achievement-oriented group had a larger number of fashionable clothing items and experienced more activities in vogue. Also, there were significant group differences in shopping practice, such as average monthly allowance, number of annual purchase clothing items.

• 한국재료학회지
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• 제23권2호
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• pp.128-134
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• 2013

A study on the corrosion behavior of Inconel alloys and Incoloy 800H in molten salt of LiCl-$Li_2O$ was investigated at $650^{\circ}C$ for 24-312 hours in an oxidation atmosphere. The order of the corrosion rate was Inconel 600 < Inconel 601 < Incoloy 800H < Inconel 690. Inconel 600 showed the best performance suggesting that the content of Fe, Cr and Ni are the important factor for corrosion resistance in hot molten salt oxidation conditions. The corrosion products of Inconel 600 and Inconel 601 were $Cr_2O_3$ and $NiFe_2O_4$, In case of Inconel 690, a single layer of $Cr_2O_3$ was formed in the early stage of corrosion and an outer layer of $NiFe_2O_4$ and inner layer of $Cr_2O_3$ were formed with an increase of corrosion time. In the case of Incoloy 800H, $Cr_2O_3$ and $FeCr_2O_4$ were observed. Most of the outer scale of the alloys was observed to be spalled from the results of the SEM analysis and the unspalled scale which adhered to the substrate was composed of three layers. The outer layer, the middle one, and the inner one were Fe, Cr, and Ni-rich, respectively. Inconel 600 showed localized corrosion behavior and Inconel 601, 690 and Incoloy 800H showed uniform corrosion behavior. Ni improves the corrosion resistance and too much Cr and/or Fe content deteriorates the corrosion resistance.

• 사회복지연구
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• 제43권2호
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• pp.295-317
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• 2012

글로벌 경기침체와 소비시장 위축으로 인해 지속가능경영, 상생경영이 기업의 주요과제로 대두되면서 사회공헌활동에 대한 기업의 관심과 참여는 계속 증가하고 있으며, 특히 직원의 기부나 자원봉사활동 등 직원참여형 사회공헌활동이 급격하게 증가하고 있다. 본 연구는 직원참여형 사회공헌활동이 내부 이해관계자인 직원들에게 어떠한 영향을 미치는지를 고찰하기 위해 직원의 기부와 봉사참여가 기업사회공헌활동에 대한 인식과 태도를 매개로 직무만족과 조직시민행동에 미치는 영향을 구조방정식 모형을 사용하여 분석하였다. 연구결과, 직원의 기부 참여는 사회공헌에 대한 인식과 태도를 매개로 직무만족과 조직시민행동에 영향을 미치는 것으로 나타났으며, 봉사활동 참여는 사회공헌인식에는 긍정적인 영향을 미쳤으나, 직무만족과 조직시민행동에 미치는 영향에서 매개효과의 영향력은 유의하지 않았다. 이러한 연구결과를 토대로 직원참여형 사회공헌활동의 내부이해관계자 효과를 높이기 위한 요소에 대해 제언하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.239-248
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• 2006

The interaction between ground water and structure is complicated behavior which cannot be easily investigated In the laboratory and monitored in the fields. In this study numerical simulation of the interactive behavior was performed using sophisticated coupled-finite element method. Hydraulic behavior of structure is modeled using solid elements with finite Permeability. Recovery of ground water table in the long-term is considered by controlling hydraulic boundary conditions. The results showed that the interaction effect is significant. Particularly non-symmetry in the lining permeability resulted in highly unbalanced pore water pressure which may cause detrimental effects on inner linings of tunnels acting as drains.

• Progress in Superconductivity
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• 제3권2호
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• pp.183-187
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• 2002

In this paper we analyzed the electromagnetic behavior of high $-T_{c}$ superconductor under the quench state using finite element method. Poisson equation was used in finite element analysis as a governing equation and was solved using algebra equation using Gallerkin method. We first investigate d the electromagnetic behavior of U-type superconductor. Finally we applied our analysis techniques to 5.5 kVA meander-line superconducting fault current limiters (SFCL) which are currently developed by many power-system researcher in the world. Meshes of 14,600 elements were used in analysis of this SFCL. Analysis results show that the distribution of current density was concentrated to inner curvature in meander-line type-superconductors and maximum current density 14.61 $A/\m^2$ and also maximum Joule heat was 6,420 W/㎥. We concluded that this meander line-type SFCL was not pertinet fur uniform electromagnetic field distribution.n.

• Structural Engineering and Mechanics
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• 제43권1호
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• pp.53-70
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• 2012

Sliding cable joints have been developed for the cable dome structures and the suspen-dome structures to reduce the cable pre-stressing loss and obtain a uniform inner force in each hoop cable. However, the relevant investigation is less addressed on the structural behavior of the cable dome structures and the suspen-dome structures with sliding cable joints due to the lack of analysis techniques. In this paper, a closed sliding polygonal cable element was established to analyze the structural behavior of the cable dome structures and the suspen-dome structures with sliding cable joints. The structural behaviors with sliding cable joints were obtained.

• 한국정밀공학회지
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• 제23권10호
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• pp.80-87
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• 2006

Metallic sandwich plate with a truss core has metallic inner structures which have low relative density between a pair of metal skin sheets or face sheets. In this work, low impact tests have been carried out to examine the behavior of sandwich plates with a pyramidal truss core. For the low velocity impact, the impact apparatus of drop weight type has been fabricated. From the results of the experiments, maximum energy absorption is found to happen when the upper sheet fails. The sandwich plate loses its absorption ability as soon as the inner structures have been crashed completely and optimal core thickness has existed to maximize energy absorption. Comparing the metallic sandwich plate with the monocoque plate, the absorbed energy has been improved up to 160 % and the deflection decreased by up to 76%. As a result, the metallic sandwich plate with a truss core is shown to have good material for impact resistance and energy absorption.

• Steel and Composite Structures
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• 제14권2호
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• pp.191-204
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• 2013

A hybrid double skin concrete filled (HDSCF) circular steel tube column is proposed in this study. The yield strength of the outer steel tube is larger than 690MPa and the inner tube has less strength. In order to achieve efficiency with the high strength outer tube, a feasibility study on reducing the thickness of the tube below the specified design codes for CFTs was conducted based on an experimental approach. The experiment also took variables such as thickness of the inner tube, hollow ratio, and strength of concrete into consideration to investigate the behavior of the HDSCF column. In order to estimate the applicability of design equations for CFTs to the HDSCF column, test results from CFT and HDSCF columns with design codes were compared. It was found that the axial compressive performance of the proposed HDSCF column is equivalent to that of the conventional CFT member irrespective of design variables. Furthermore, the design equation for a circular CFT given by EC4 is applicable to estimate the ultimate strength of the HDSCF circular steel tube column.

• 소성∙가공
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• 제21권6호
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• pp.360-365
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• 2012

The aim of this study was to investigate the effects of forming depth on the deformation behavior of cup-like tubes made of AISI1020 steel in tube spinning process. Spinning process was performed on cup-like tubes, which had an inner diameter of 34mm and thicknesses of 7, 8.5 or 11.5mm. The forming depths achieved were 3, 4, and 5.5mm. The complex deformation behaviors occurring during the tube spinning process was explained using the experimental results. Also analyzed were the causes of the material buildup and the bulge defect of inner surface, observed on cross section of tubes. The relationship between tube spinning conditions and the height of bulge defect was examined. The results indicate that bulge defect is increased with a decrease of the forming depth. Moreover, a critical forming depth exists for preventing the generation of the bulge defect in the tube spinning process. The present results will be useful for future decisions of forming depths for successful tube spinning of cup-like tubes.

• 한국재료학회지
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• 제25권11호
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• pp.612-615
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• 2015

In this work, on-site corrosion behavior of heat resistant tubes of T91, used as components of a superheater in a power plant for up to 25,762 h, has been investigated using scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy (EDS), and electron backscattered diffraction(EBSD), with the objectives of studying the composition, phase distribution, and evolution during service. A multi-layer structure of oxide scale was found on both the steamside and the fireside of the tube surface; the phase distribution was in the order of hematite/magnetite/spinel from the outer to the inner matrix on the steamside, and in the order of slag/magnetite/spinel from the outer to the inner matrix on the fireside. The magnetite layer was found to be rich in pores and cracks. The absence of a hematite layer on the fireside was considered to be due to the low oxygen partial pressure in the corrosion environment. The thicknesses of the hematite and of the slag-deposit layer were found to exhibit no significant change with the increase of the service time.