• Computers and Concrete
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• 제19권1호
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• pp.87-98
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• 2017

In recent year, the coat layer drops and the rebar rust of bridge parapets, which caused the structural performance degradation. In order to achieve the comprehensive rehabilitation, ultra high performance cementitious composites is proposed to existing RC parapet rehabilitation. The influence factors of UHPCC rehabilitation includes two parts, i.e., internal factors related with material, such as UHPCC layer thickness, corrosion ratio of rebars, fiber volume fraction, and external factors related with the load, such as impact speeds, impact angles, vehicle mass. The influence of the factors was analyzed in this paper based on the nonlinear finite element. The analysis results of the maximum dynamic deformation and the peak impact load of parapets revealed the influence of the internal factors and the external factors on anti-collision performance and degree degradation. This research may provide a reference for the comprehensive multifunctional rehabilitation of existing bridge parapets.

• Structural Engineering and Mechanics
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• 제18권2호
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• pp.151-166
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• 2004

The interaction between concrete core expansion and deformation of perimeter ties has been known to have a significant effect on the effective confinement of rectangular reinforced concrete (RC) tied columns. This interaction produces passive confining pressure to the concrete core. Most existing models for determining the response of RC tied columns do not directly account for the influence of flexural stiffness of the ties and the variation of confining stress along the column height. This study presents a procedure for determining the confined compressive strength of RC square columns confined by rectilinear ties with various tie configurations considering directly the influence of flexural flexibility of the ties and the variation of confining stress along the vertical direction. The concept of area compatibility is employed to ensure compatibility of the concrete core and steel hoop in a global sense. The proposed procedure yields satisfactory predictions of confined strengths compared with experimental results, and the influence of tie flexibility, tie configuration and degree of confinement can be well captured.

• Asia pacific journal of information systems
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• 제7권1호
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• pp.99-111
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• 1997

This paper presents an application of an artificial neural net to the implementation of decision class analysis (DCA), together with the generation of a decision model influence diagram. The diagram is well-known as a good tool for knowledge representation of complex decision problems. Generating influence diagram model is known to in practice require much time and effort, and the resulting model can be generally applicable to only a specific decision problem. In order to reduce the burden of modeling decision problems, the concept of DCA is introduced. DCA treats a set of decision problems having some degree of similarityz as a single unit. We propose a method utilizing a feedforward neural net with supervised learning rule to develop DCA based on influence diagram, which method consists of two phases: Phase l is to search for relevant chance and value nodes of an individual influence diagram from given decision and specific situations and Phase II elicits arcs among the nodes in the diagram. We also examine the results of neural net simulation with an example of a class of decision problems.

• 복식문화연구
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• 제14권6호
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• pp.887-899
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• 2006

In this study the preference degree of a Dangcho pattern with priority given to demographic variables was examined. The results was that demographic variables have influence on the preference degree of a Dangcho pattern. The continual arrangement pattern of a stylistic type was shown as the pattern that men in their 40s and over most prefer. The continual arrangement pattern of a realistic type was shown as the pattern that men in their 40s and over and women in their 50s and over most prefer. The continual arrangement pattern of a geometrical type was shown as the pattern that men working on a sales, service, production position and women in their 50s most prefer. The single arrangement pattern of a stylistic type was shown as the pattern that college men in their 20s, men in their 50s and women working on a sales, production, service position most prefer. The single arrangement pattern of a stylistic type of a realistic type was shown as the pattern that men in their 40s working on a sales, service, production position and college women in their 20s most prefer. The single arrangement pattern of a geometrical type was shown as the pattern that most of people prefer.

• International Journal of Advanced Culture Technology
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• 제6권2호
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• pp.23-29
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• 2018

The purpose of the present study was to investigate the influence of smartphone addiction on learning immersion, sociality and morality of college students and the present study is a descriptive survey research to investigate the influence of smartphone addiction on learning immersion, sociality and morality of college students. The subjects were 145 freshman, sophomore and junior students in the Department of Health at a college located in the Gyeongbuk region, and the data were collected from November 15 to 18, 2017. upon analyzing the correlations between the variables, a negative correlation was found between learning immersion and sociality and between learning immersion and morality, indicating that the learning immersion decreased as the sociality or morality increased. A positive correlation was found between sociality and morality, indicating that those who have a higher degree of sociality have a higher level of morality.

• 품질경영학회지
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• 제27권3호
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• pp.1-16
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• 1999

According to the study of TQM implementations, the odds that an organization will successfully implement total quality management are two to one-against it. Based on the Brown's study, two thirds of all TQM implementations are dropped or fail altogether. However, organizations armed with knowledge of the factors that have the biggest impact on their success can take steps to influence or change those factors. In this paper, we studied on the degree of influence between those factors and successful start up and alignment factors. Based on extensive literature reviews those factors, threat, commitment, plan, progress and strategy are determined. Also we determine the successful start up and alignment factors. A framework of research including above factors is developed and tested statistically The Perceived data are collected from managers of quality departments of 141 Korean firms through survey. The results show that the rating of those factors which determine success of implementing TQM is progress, commitment, strategy and progress. But the factor of threat shows negative influence for the success of implementing TQM.

• 한국산학기술학회논문지
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• 제19권9호
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• pp.234-242
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• 2018

본 연구는 간호대학생의 임상실습 적응에 미치는 영향요인을 파악하여 된 서술적 조사연구이다. 2018년 4월 26일부터 2018년 5월 4일까지 간호대학생 180명에게 전환충격(17문항), 사회적지지(24문항), 임상 실습준비도(2문항), 임상실습 적응(14문항)으로 구성된 자가 보고식 설문지를 이용해 자료를 수집하였고, 수집된 자료는 IBM SPSS Win 18.0을 이용해 빈도와 백분율, t-test, one way ANOVA, Pearson correlation coefficient, 단계적 다중회귀분석을 시행하여 분석하였다. 임상실습적응은 전환충격(r=-.55)과는 음의 상관관계를 보였고, 사회적 지지의 친구영역(r=.24), 부모영역(r=.32), 교수영역(r=.38), 임상실습 준비(r=.35)와는 양의 상관관계를 보였다. 전환충격이 작아질수록(B=-.409), 임상실습 준비도(B=.766)와 교수의 지지(B=.228), 부모의 지지(B=.163)이 커질수록 임상실습 적응이 커지는 것으로 나타났다. 전환충격, 임상실습 준비도, 교수의 지지 순으로 임상실습 적응에 영향을 주는 것으로 나타나 임상실습 적응을 높이기 위해서는 개인의 실습 준비나 교수의 지지뿐만 아니라 간호대학생의 전환충격을 줄일 수 있는 방안을 마련할 필요가 있겠다.

• 한국도로학회논문집
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• 제17권4호
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• pp.117-126
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• 2015

PURPOSES : This study aims to investigate the direct and indirect influence areas from incidents on urban interrupted roadways and to develop traffic management strategies for each influence area. METHODS : Based on a literature review, various traffic management strategies for certain incidents were collected. In addition, the relationship between the measure of effectiveness and the characteristics of incidents was explored using an extensive simulation study. RESULTS : From the simulation studies, traffic delays increased as the number of lane closures increased, and the impact of lane closures was reduced to the direction upstream from the incident site. However, the magnitude of the delay change depended on the degree of saturation. Using these characteristics, the direct and indirect influence areas resulting from incidents were defined, and traffic management strategies were established for each direct and indirect influence area and for each level of incident. CONCLUSIONS: The results of this study will contribute to the improvement of national traffic safety by preventing secondary incidents and by effective adaptation to incident events.

• 대한기계학회논문집A
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• 제27권2호
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• pp.247-254
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• 2003

The paper presents the influence of spring dynamics and friction on dynamic responses in a spring-driven cam system. The characteristics of the friction on the camshaft are analyzed using the nonlinear pendulum experiment while the parameters of the friction model are estimated using the optimization technique. The analysis reveals that the friction of the camshaft depends on stick-slip, Stribeck effect and viscous damping. Spring elements are found to have much influence on the dynamic characteristics. Hence, they are modeled as four-degree-of-freedom lumped masses with equivalent springs. The appropriateness of the derived friction model and spring model is verified by its application to a vacuum circuit breaker mechanism of the cam-follower type.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회B
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• pp.2471-2476
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• 2008

Turbulent flow and heat transfer to water at supercritical pressure flowing in vertical pipes is investigated using direct numerical simulation (DNS). A conservative space-time discretization scheme for variable-density flows at low Mach numbers is adopted in the present study to treat steep variations of fluid properties at supercritical pressure just above the thermodynamic critical point. The fluid properties at these conditions are obtained using PROPATH and used in the form of tables in the simulations. The buoyancy influence induced by strong variation of density across the pseudo-critical temperature proved to play an important role in turbulent flow and heat transfer at supercritical state. Depending on the degree of buoyancy influence, turbulent heat transfer may be enhanced or significantly deteriorated, resulting in local hot spots along the heated surface.