• 경영과정보연구
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• 제34권2호
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• pp.39-65
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• 2015

본 연구는 GWP 조직문화가 조직구성원들의 성취욕구(Need for Achievement)와 직무만족(Job Satisfaction), 직무성과(Job Performance)에 미치는 영향을 분석한 실증연구이다. 이를 위해, 본 연구는 2010년 이후 국내에서 일하기 좋은 기업(GWP)으로 선정된 대기업 중, 제조/서비스/금융업 종사자들을 대상으로 설문조사를 실시하여, GWP 조직문화가 산업별 종사자들에게 미치는 영향과 변수 간의 관계를 비교분석하였다. 본 연구 결과 첫째, 제조업에서는 GWP 조직문화가 성취욕구와 직무만족에 유의한(+) 영향을 미치는 것으로 나타났고, 직무성과에는 유의한 영향을 미치지 못하는 것으로 분석되었다. 또한 성취욕구는 직무만족과 직무성과에 유의한(+) 영향을 미치는 것으로 나타났고, 직무만족도 직무성과에 유의한(+) 영향을 미치는 것으로 분석되었다. 둘째, 서비스업에서는 GWP 조직문화가 성취욕구와 직무만족에 유의한(+) 영향을 미치는 것으로 나타났으나, 직무성과에는 유의한 영향을 미치지 못하는 것으로 분석되었다. 그리고 성취욕구는 직무만족에 유의한(+) 영향을 미치는 것으로 나타났고, 직무성과에는 유의한 영향을 미치지 못하였으며, 직무만족도 직무성과에 유의한 영향을 미치지 못하는 것으로 분석되었다. 마지막으로, 금융업에서는 GWP 조직문화가 성취욕구과 직무만족(+), 직무성과(-)에 유의한 영향을 미치는 것으로 나타났고, 성취욕구는 직무만족과 직무성과에 유의한(+) 영향을 미쳤으며, 직무만족도 직무성과에 유의한(+) 영향을 미치는 것으로 분석되었다. 본 연구는 이와 같은 분석결과를 토대로, GWP 조직문화가 산업별 종사자들에게 미치는 공통점과 차이점을 중심으로 그 의미와 시사점을 제시하였다.

• 한국멀티미디어학회논문지
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• 제8권5호
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• pp.691-699
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• 2005

멀티미디어 교육의 중요한 목표 중 하나는 멀티미디어 컨텐츠를 직접 저작하는 능력을 함양하는 데 있다. 이를 위한 방법으로 프로젝트기반의 멀티미디어 컨텐츠 저작 교육을 실시하고 그 효과를 검정해 봄으로써 더 나은 교수전략의 개발에 기여할 수 있다. 본 연구에서는 멀티미디어 교육의 목표에 충실하기 위하여 멀티미디어 컨텐츠 저작을 위한 프로젝트 진행방식으로 대학에서 한학기 동안 멀티미디어 교육을 수행하고 그 효과를 학습자의 특성에 따라 분석하였다. 그 결과 학습자 개인의 특성 중 '나이', '편입학석부' 등에 따른 학습효과의 차이가 통계적으로 유의한 것으로 드러났으며 '프로젝트에 대한 관심도'와 '프로젝트에서의 역할' 등에 의한 성취도 차이도 뚜렷하게 나타났다.

• 한국전산유체공학회지
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• 제18권4호
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• pp.9-16
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• 2013

Cavitation on an axi-symmetric hemispherical head-form body was studied using an Reynolds-averaged Navier-Stokes equations solver based on a cell-centered finite volume method. To consider compressibility effects on the vapor phase and cavity interface, a pressure-based compressible flow CFD code was developed. To validate the developed CFD code, cavitating flow around the hemispherical head-form body was simulated using pressure-based incompressible and compressible CFD codes and validated against existing experimental data in the three-way comparison. The cavity shedding behavior, length of re-entrant jet, drag history, and Strouhal number of the hemispherical head-form body were compared between two CFD codes. The results, in this paper, suggested that the computations of cavitating flow with compressibility effects improve the description of cavity dynamics.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1996년도 춘계학술발표회논문집(2)
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• pp.233-240
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• 1996

Analyses of the viscous and end effects on electromagnetic (EM) pumps of annular linear induction type for the sodium coolant circulation in Liquid Metal Fast Breeder Reactors have been carried out based on the MHD laminar flow analysis and the electromagnetic field theory. A one-dimensional MHD analysis for the liquid metal flowing through an annular channel has been performed on the basis of a simplified model of equivalent current sheets instead of three-phase currents in the discrete primary windings. The calculations show that the developed pressure difference resulted from electromagnetic and viscous forces in the liquid metal is expressed in terms of the slip, and that the viscous loss effects are negligible compared with electromagnetic driving forces except in the low-slip region where the pumps operate with very high flow velocities comparable with the synchronous velocity of the electromagnetic fields, which is not applicable to the practical EM pumps. A two-dimensional electromagnetic field analysis based on an equivalent current sheet model has found the vector potentials in closed form by means of the Fourier transform method. The resultant magnetic fields and driving forces exerted on the liquid metal reveal that the end effects due to finiteness of the pump length are formidable. In addition, a two-dimensional numerical analysis for vector potentials has been performed by the SOR iterative method on a realistic EM pump model with discretely-distributed currents in the primary windings. The numerical computations for the distributions of magnetic fields and developed pressure differences along the pump axial length also show considerable end effects at both inlet and outlet ends, especially at high flow velocities. Calculations of each magnetic force contribution indicate that the end effects are originated from the magnetic force caused by the induced current ( u x B ) generated by the liquid metal movement across the magnetic field rather than the one (E) produced by externally applied magnetic fields by three-phase winding currents. It is concluded that since the influences of the end effects in addition to viscous losses are extensive particularly in high-velocity operations of the EM pumps, it is necessary to find ways to suppress them, such as proper selection of the pump parameters and compensation of the end effects.

• 아동학회지
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• 제26권5호
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• pp.217-232
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• 2005

This study examined the effects of an art program based on multiple intelligence theory on children's creativity and spatial ability. The art education program focused on three processes : perception, production and reflection. Subjects were 68 five-year-old children. The experimental design was 'The Untreated Control Group Design with Pretest & Posttest'. ANCOV was employed for statistical analysis. Results were that the children in the experimental group scored significantly higher on creativity and spatial ability than the children in the control group. Results imply that an art education program based on multiple intelligence theory can be an effective teaching model for improving children's creativity and spatial ability.

• Steel and Composite Structures
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• 제25권1호
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• pp.67-78
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• 2017

In this study, free vibration of functionally graded (FG) micro/nanobeams based on nonlocal third-order shear deformation theory and under different boundary conditions is investigated by applying the differential quadrature method. Third-order shear deformation theory can consider the both small-scale effects and quadratic variation of shear strain and hence shear stress along the FG nanobeam thickness. The governing equations are obtained by using the Hamilton's principle, based on third-order shear deformation beam theory. The differential quadrature (DQ) method is used to discretize the model and attain the natural frequencies and mode shapes. The properties of FG micro/nanobeam are assumed to be chanfged along the thickness direction based on the simple power law distribution. The effects of various parameters such as the nonlocal parameter, gradient index, boundary conditions and mode number on the vibration characteristics of FG micro/nanobeams are discussed in detail.

• 무역학회지
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• 제45권2호
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• pp.31-49
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• 2020

The purpose of this study is to investigate the effects of knowledge-based resource and ambidextrous capability on their export performance of small and medium-sized enterprises (SMEs). Drawing on an extensive review of the literature on Knowledge-based resource and ambidextrous capability, hypotheses are developed and tested using a sample of 284 SMEs in South Korea. Structural equation modeling was applied. As a result of analysis, first, international entrepreneurship has a significant effect on ambidextrous capability. Second, human capital has significant influence on ambidextrous capability. Third, ambidextrous capability has a significant effect on export performance. The results indicate that their knowledge-based resources ware significant driver of their ambidextrous capability. and that their ambidextrous capability was significant driver of their export performance. In the final conclusion section, implications and limitations of research results and suggestions for future research are discussed.

• Computers and Concrete
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• 제21권4호
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• pp.355-365
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• 2018

Five previously-tested reinforced concrete frames were modelled using a nonlinear finite element analysis procedure to demonstrate the accurate response simulations for seismically-deficient frames through pushover analyses. The load capacities, story drifts, and failure modes were simulated. This procedure accounts for the effects of shear failures and the shear-axial force interaction, and thus is suitable for modeling seismically-deficient frames. It is demonstrated that a comprehensive analysis method with a capability of simulating material constitutive response and significant second-order mechanisms is essential in achieving a satisfactory response simulation. It is further shown that such analysis methods are invaluable in determining the expected seismic response, safety, and failure mode of the frame structures for a performance-based seismic evaluation. In addition, a new computer program was developed to aid researchers and engineers in the direct displacement-based seismic design process by assessing whether a frame structure meets the code-based performance requirements by analyzing the analysis results. As such, the proposed procedure facilitates the performance-based design of new buildings as well as the numerical assessment and retrofit design of existing buildings. A sample frame analysis was presented to demonstrate the application and verification of the approach.

• ETRI Journal
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• 제43권2호
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• pp.272-287
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• 2021

This article presents a multi-dimensional spatial pattern analysis of crime events in San Francisco. Our analysis includes the impact of spatial resolution on hotspot identification, temporal effects in crime spatial patterns, and relationships between various crime categories. In this work, crime prediction is viewed as a classification problem. When predictions for a particular category are made, a binary classification-based model is framed, and when all categories are considered for analysis, a multiclass model is formulated. The proposed crime-prediction model (HotBlock) utilizes spatiotemporal analysis for predicting crime in a fixed spatial region over a period of time. It is robust under variation of model parameters. HotBlock's results are compared with baseline real-world crime datasets. It is found that the proposed model outperforms the standard DeepCrime model in most cases.

• Computers and Concrete
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• 제33권6호
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• pp.725-738
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• 2024

This study presents a macro-modeling procedure for nonlinear finite element analysis of reinforced and prestressed concrete panels under blast loading. The analysis procedure treats cracked concrete as an orthotropic material based on a smeared rotating crack model within the context of total-load secant stiffness-based formulation. A direct time integration method compatible with the analysis formulation is adapted to solve the dynamic equation of motion. Considerations are made to account for strain rate effects. The analysis procedure is verified by modeling 14 blast tests from various sources reported in the literature including a blast simulation contest. The analysis results are compared against those obtained from experiments, simplified single-degree-of-freedom (SDOF) methods, and sophisticated hydrocodes. It is demonstrated that the smeared crack macro-modeling approach is a viable alternative analysis procedure that gives more information about the structural behavior than SDOF methods, but does not require detailed micro-modeling and extensive material characterization typically needed with hydrocodes.