• 한국콘텐츠학회논문지
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• 제6권8호
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• pp.85-93
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• 2006

최근 들어, IT 행동과 관련된 연구가 진행되었음에도 불구하고 수용자의 유형에 따라 행동이 어떻게 달라지는지 파악한 연구는 거의 없다. 본 연구는 모바일 인터넷 서비스를 대상으로 수용자의 유형에 따라 수용 후 행동이 어떻게 달라지는지 검증하고자 한다. 이를 위해, 본 연구에서는 사용 지속 모델을 이용하였고, 이 모델을 기반으로 두 집단 간의 행동 차이를 검증하였다. 연구 결과, 두 집단 간의 IT 행동은 각각 다르게 나타났다. 본 연구의 결과는 이론적인 의의와 실용적인 의의 점을 제공하고 있다.

• 유통과학연구
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• 제15권1호
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• pp.71-81
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• 2017

Purpose - Consumers heuristically have a specific stereotype on the price level of individual retail format because each format provides them with a different level of purchase satisfaction and emotional benefits. However, if price image which is consumers' overall impression of the aggregate price level of a retailer does not match with their expectations, its price level would be perceived as unfair. It will eventually lead to dissatisfaction and decreased revisit intention. Focused on department store and discount store, this study was designed to verify whether the price fairness plays a role of mediating effect on two influential relationships between price image and post-purchase satisfaction, and price image and repatronage intention. Research design, data, and methodology - A main survey was conducted to 140 students and 128 effective responses were used for the related analysis. T-test, factor analysis, reliability test, and mediated regression analysis were performed. Six hypotheses were developed to examine the mediating effect of price fairness on the two influential relationships between price image and post-purchase satisfaction, and price image and repatronage intention. It was also examined whether the price image of two different retail format is formed differently or not. Results - People perceived the price images of the two retail formats differently. Overall price level of department store is much higher than that of discount store. Analysis results showed that price image did not solely have a significant influence on post-purchase satisfaction unless price fairness as a mediating variable is added. Price fairness turned out to be having a significant influence on relationship between price image and repatronage intention. It influences on repatronage intention directly and also via price fairness. Conclusions - Post-purchase satisfaction can be achieved only if people perceive the price image as fair no matter how the price level is high or low according to traits of retail formats. If they think it's not fair, they would disapprove of the rightness for the price image, and also express their dissatisfaction with it. Consumers willingly make repeated visits to a store if they are convinced of appropriate price level which is perceived as fair, and if they experienced a satisfaction with overall benefits a particular store offered.

• 동유럽발칸연구
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• 제36권
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• pp.247-268
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• 2013

본 논문은 지하경제의 문제점을 통해, 동유럽 보통 사람들의 삶이 체제 이행 과정에서 어떻게 변화했는지 고찰하고 있다. 1989년 이후 동유럽 사회는 급격한 자본주의 체제로의 이행을 겪었다. 충격요법의 실행은 대량실업의 발생, 복지 혜택의 축소 등 동유럽 보통 사람들의 삶의 질을 급격히 악화시키는 결과를 초래하였다. 이제 많은 사람들이 살아남기 위해 공식 경제 영역이 아닌 지하경제 활동에 뛰어들게 되었다. 현실사회주의 시절 계획 경제의 경직성을 완화시켜 주던 지하경제는, '유연한' 자본주의 체제로의 전환했다지만 여전히 생계수단이 되고 있는 것이다. 체제는 바뀌었다지만 생계수단은 바꾸지 않은 셈인 것이다.

• Genomics & Informatics
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• 제6권4호
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• pp.223-226
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• 2008

We introduce a computational approach for analysis of glycosylation in Post-PKS tailoring steps. It is a computational method to predict the deoxysugar biosynthesis unit pathway and the substrate specificity of glycosyltransferases involved in the glycosylation of polyketides. In this work, a directed and weighted graph is introduced to represent and predict the deoxysugar biosynthesis unit pathway. In addition, a homology based gene clustering method is used to predict the substrate specificity of glycosyltransferases. It is useful for the rational design of polyketide natural products, which leads to in silico drug discovery.

• 구강회복응용과학지
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• 제27권3호
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• pp.253-265
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• 2011

근관치료된 치아의 수복에서 fiber post 크기와 포스트 공간의 직경이 일치하지 않은 경우, 포스트 공간은 두꺼운 레진 시멘트로 채워지게 된다. 레진 시멘트가 두꺼워지면 시멘트 내에 기포가 형성되어 포스트 분리가 발생되기 쉽다. 이런 문제점을 해결하기 위한 방법은 composite resin을 이용하여 fiber post를 relining하는 것이다. 이렇게 형성된 해부학적 포스트는 포스트 공간에 잘 적합하고 시멘트의 두께를 감소시킨다. 이 연구의 목적은 relining 과정과 임상 과정의 간소화를 위해 사용되고 있는 luting agents 종류에 따른 fiber post의 push-out 결합 강도를 평가하는 것이다. 42개의 발치된 치아는 6개의 그룹(n=7)으로 나누어졌다. (A1: relined fiber post를 Luxacore/all-bond 2로 합착, A2: non-relined fiber post를 Luxacore/all-bond 2로 합착. B1: relined fiber post를 Calibra/XP-bond로 합착. B2: non-relined fiber post를 Calibra/XP-bond로 합착. C1: relined fiber post를 RelyX Unicem으로 합착. C2: non-relined fiber post를 RelyX Unicem으로 합착.) Push-out 결합 강도는 relining procedure와 cement type의 상호작용에 의해 영향을 받는 것으로 나타났다. relined fiber post 그룹이 non-relined fiber post 그룹보다 더 높은 결합 강도를 가지며 fiber post relining 과정은 결합강도에 유의한 영향을 가진다.(p<0.05) Luting agent에 따라 모든 그룹에서 RelyX Unicem의 결합강도가 Luxacore/All-bond 2와 Calibra/XP bond에 의한 것보다 유의하게 더 높았다(p<0.05).

• Structural Engineering and Mechanics
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• 제6권6호
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• pp.693-710
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• 1998

This paper concerns studies on the shape formation of post-tensioned and shaped steel domes. The post-tensioned and shaped steel domes, assembled initially at ground level in an essentially flat condition, are shaped to a curved space form and erected into the final position by means of a post-tensioning technique. Based on previous studies on this shape formation principle, three post-tensioned and shaped steel domes have been constructed. The results of the shape formation tests and finite element analyses are reported in this paper. It is found that the first two test domes did not furnish a part-spherical shape as predicted by finite element analyses, because the movements of some mechanisms were not controlled sufficiently. With a revised post-tensioning method, the third dome obtained the theoretical prediction. The test results of the three post-tensioned and shaped domes have shown that a necessary condition to form a desired space shape from a planar layout with low joint stiffnesses is that the movements of all the existing mechanisms must be effectively controlled as indicated by the finite element analysis. The extent of the maximum elastic deformation of a post-tensioned and shaped steel structure is determined by the strength of the top chords and their joints. However, due to the semi-rigid characteristic of the top chord joints, the finite element analyses cannot give a close prediction for the maximum elastic deformations of the post-tensioned and shaped steel domes. The results of the current studies can be helpful for the design and construction of this type of structure.

• Structural Engineering and Mechanics
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• 제51권6호
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• pp.955-971
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• 2014

Large post-buckling behavior of Timoshenko beams subjected to non-follower axial compression loads are studied in this paper by using the total Lagrangian Timoshenko beam element approximation. Two types of support conditions for the beams are considered. In the case of beams subjected to compression loads, load rise causes compressible forces end therefore buckling and post-buckling phenomena occurs. It is known that post-buckling problems are geometrically nonlinear problems. The considered highly non-linear problem is solved considering full geometric non-linearity by using incremental displacement-based finite element method in conjunction with Newton-Raphson iteration method. There is no restriction on the magnitudes of deflections and rotations in contradistinction to von-Karman strain displacement relations of the beam. The beams considered in numerical examples are made of lower-Carbon Steel. In the study, the relationships between deflections, rotational angles, critical buckling loads, post-buckling configuration, Cauchy stress of the beams and load rising are illustrated in detail in post-buckling case.

• The Journal of Advanced Prosthodontics
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• 제6권1호
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• pp.60-65
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• 2014

Teeth that have short clinical crown, which are not alone enough to support the definitive restoration can be best treated using the post and core system. The advantages of fiber post over conventional metallic post materials have led to its wide acceptance. In addition to that the combination of aesthetic and mechanical benefits of fiber post has provided it with a rise in the field of dentistry. Also the results obtained from some clinical trials have encouraged the clinicians to use the fiber posts confidently. Fiber posts are manufactured from pre-stretched fibers impregnated within a resin matrix. The fibers could that be of carbon, glass/silica, and quartz, whereas Epoxy and bis-GMA are the most widely used resin bases. But recently studies are also found to be going on for polyimide as possible material for the fiber post resin base as a substitute for the conventional materials.

• Steel and Composite Structures
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• 제34권2호
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• pp.289-297
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• 2020

In the present research post-buckling of a cut out plate reinforced through carbon nanotubes (CNTs) resting on an elastic foundation is studied. Material characteristics of CNTs are hypothesized to be altered within thickness orientation which are calculated according to Mori-Tanaka model. For modeling the system mathematically, first order shear deformation theory (FSDT) is applied and using energy procedure, the governing equations can be derived. With respect to Rayleigh-Ritz procedure as well as Newton-Raphson iterative scheme, the motion equations are solved and therefore, post-buckling behavior of structure will be tracked. Diverse parameters as well as their reactions on post-buckling paths focusing cut out measurement, CNT's volume fraction and agglomeration, dimension of plate and an elastic foundation are investigated. It is revealed that presence of a square cut out can affect negatively post-buckling behavior of structure. Moreover, adding nanocompsits in the matrix leads to enhancement of post-buckling response of system.

• Geomechanics and Engineering
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• 제31권3호
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• pp.329-337
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• 2022

In this paper, the thermal post-buckling characteristics of functionally graded (FG) pipes with initial geometric imperfection are studied. Considering the influence of initial geometric defects, temperature and geometric nonlinearity, Euler-Lagrange principle is used to derive the nonlinear governing equations of the FG pipes. Considering three different boundary conditions, the two-step perturbation method is used to solve the nonlinear governing equations, and the expressions of thermal post-buckling responses are also obtained. Finally, the correctness of this paper is verified by numerical analyses, and the effects of initial geometric defects, functional graded index, elastic foundation, porosity, thickness of pipe and boundary conditions on thermal post-buckling response are analyzed. It is found that, bifurcation buckling exists for the pipes without initial geometric imperfection. In contrast, there is no bifurcation buckling phenomenon for the pipes with initial geometric imperfection. Meanwhile, the elastic stiffness can significantly improve thermal post-buckling load and thermal post-buckling strength. The larger the porosity, the greater the thermal buckling load and the thermal buckling strength.