• 한국비블리아학회지
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• 제27권1호
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• pp.313-336
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• 2016

이 연구의 목적은 사회 취약계층의 일상적 정보행태를 연구하기 위한 이론적 틀(메타이론, metatheory)을 비교 분석하는데 있다. 이를 위해 이 연구에서는 정보행태 연구의 대표적인 메타이론인 인지적 접근, 정서적 접근, 사회적 접근을 구분하여 살펴보고, 각 관점과 관련된 대표적인 이론 및 모델의 특성을 분석하였다. 이러한 분석을 통해 이 연구에서는 인지적 관점과 정서적 관점이 정보행태의 복잡하고 역동적인 사회적 맥락과 특성을 있는 그대로 드러내는데 한계가 있음을 지적하고, 이를 극복할 대안으로써 사회적 관점에 주목하였다. 더불어, 사회적 관점에서 연구된 일상적 정보행태의 주요 이론/모델과 사회 취약계층의 정보행태에 관한 선행연구를 분석함으로써, 사회 취약계층의 정보행태와 특성을 연구하기에 적합한 메타이론으로 왜 사회적 관점에 주목해야 하는지를 논리적으로 제시하였다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제20권2호
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• pp.10-21
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• 2015

The present study introduces a novel numerical approach for solving dispersion dominated problems with Cauchy boundary condition in an Eulerian-Lagrangian scheme. The study reveals the incapability of traditional Neuman approach to address the dispersion dominated problems with Cauchy boundary condition, even though it can produce reliable solution in the advection dominated regime. Also, the proposed numerical approach is applied to a real field problem of radioactive contaminant migration from radioactive waste repository which is a major current waste management issue. The performance of the proposed numerical approach is evaluated by comparing the results with numerical solutions of traditional FDM (Finite Difference Method), Neuman approach, and the analytical solution. The results show that the proposed numerical approach yields better and reliable solution for dispersion dominated regime, specifically for Peclet Numbers of less than 0.1. The proposed numerical approach is validated by applying to a real field problem of radioactive contaminant migration from radioactive waste repository of varying Peclet Number from 0.003 to 34.5. The numerical results of Neuman approach overestimates the concentration value with an order of 100 than the proposed approach during the assessment of radioactive contaminant transport from nuclear waste repository. The overestimation of concentration value could be due to the assumption that dispersion is negligible. Also our application problem confirms the existence of real field situation with advection dominated condition and dispersion dominated condition simultaneously as well as the significance or advantage of the proposed approach in the real field problem.

• 가정과삶의질연구
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• 제20권5호
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• pp.137-147
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• 2002

Purpose of this study is to find the research direction to solve the housing problems for the elderly which based on approaches and issues in related studies. Research method was interpretative analysis of the articles issued from 1976 to 2002. Each approach (rationalistic approach, ecological approach, micro-sociological approach, typological approach, environment-psychological approach, welfare approach) produced helpful information and had relative merits. But the researchers must regard housing for the elderly as a social problem in macroscopic view to solve the housing problems for older people with welfare approach. As a result, to solve the housing problems with welfare approach for the elderly who live in their own place with community care, studies about lifetime home, care and repair, and management of housing for the elderly might be needed. And research about existing services, transfer system of services, financial problems, man power to manage the system might be needed to spread out the services to the middle class elderly.

• 충청수학회지
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• 제27권4호
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• pp.581-590
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• 2014

In approach theory, we can provide arbitrary products of ${\infty}p$-metric spaces with a natural structure, whereas, classically only if we rely on a countable product and the question arises, then, whether properties which are derived from countability properties in metric spaces, such as sequential and countable compactness, can also do away with countability. The classical results which simplify the study of compactness in pseudometric spaces, which proves that all three of the main kinds of compactness are identical, suggest a further study of the category $pMET^{\infty}$.

• 가정과삶의질연구
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• 제24권1호
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• pp.237-251
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• 2006

The present study was to investigate the teacher's and the mother's beliefs about literacy acquisition and to analyse differences between them The subjects for this study were 134 teachers and 174 mothers of the kindergarten and daycare centers. The 25-item questionnaire constructed by Westwood, Knight and Redden(1997) was used in this study with a slight modification. Collected data were analyzed by one-way ANOVA to verify the differences of the teacher's beliefs according to an academic background and a career, and mother's according to an academic background and an occupation, and compared by t-test to verify the differences of the teacher's and mother's beliefs. The major findings were the most teachers and mothers showed balanced approach: more skill-based about reading than writing. The university graduated teachers took more meaning-based, child-centered approach than finisher of caregiver training center. According to career, more the experienced kept more skilled-based approach. In case of the mother, the university and graduated school graduates took more meaning-based, child-centered approach than finisher of college and High school. According to occupation, more the professional kept more meaning-based approach. Finally there were no meaningful difference in an income and mothers' age. And teachers took more meaning-based, child-centered approach than mothers. Especially about writing, teachers kept much more meaning-based approach than mothers.

• 한국도로학회논문집
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• 제14권2호
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• pp.175-181
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• 2012

회전교차로(roundabout)는 용량 이하의 상태에서 접근로별 교통류가 균등할 경우 기존 신호교차로에 비해 운영효율성이 증대되나 토지이용변화로 교통량이 증가하면서 접근로별 교통류가 불균등 해질 경우(차로 당 450대/시 이상) 주접근로에서 회전교차로 내부로의 진입이 어려워져 효율성이 떨어지게 된다. 본 연구에서는 1차로형 4지 회전교차로를 대상으로 회전교차로 설치이후 교통량 증가로 신호교차로 설치에 대한 재검토를 하기 전에 회전교차로를 효율적으로 운영할 수 있는 Signal Metering 전환기준 및 운영방법을 제시하고 효과분석(지체 및 대기행렬)은 SIDRA를 활용하였다. 본 연구결과 총 진입교통량이 1,800~2,000pcu/시 이고 주접근로의 진입교통량비가 60~70%일 때 지체는 30~40% 그리고 대기행렬은 30~60% 감소하였다. 또한 주접근로에 가장 인접한 부접근로에 Metered Approach를 설치하고 한 쌍(pair)으로 묶어서 운영하는 것이 효과적인 것으로 분석되었다.

• 정보학연구
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• 제9권4호
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• pp.75-85
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• 2006

This study is to test the influence of stock option granting information on the firm's performance. The important issue in stock option is that agent cost is the important determinant factor for the long term performance. The agent cost arises between the manager and shareholders. So many study are concentrated in diminishing the agent cost, and develop some substitute tools to measure the agent cost. The event study about stock option analyzes returns around event date at a time. Event study provides estimation periods and cumulative returns. Announcements about stock option are generally associated with positive abnormal returns in short term period, but not showing positive effect in long term period. It is important to investigate the responses of stocks to new information contained in the announcements of stock option. Therefore it is important to study the long term performance in the case of stock option. The event time portfolio approach exists the CAR model, BHAR model and WR model. And the calendar time portfolio approach has the 3 factor model, 4 factor model, CTAR model, and RATS model. This study is forced to develop and arrange two approach method in evaluating the performance, the event time portfolio approach and calendar time portfolio approach.

• 한국실내디자인학회논문집
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• 제13호
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• pp.161-166
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• 1997

The composition of space is accomplished to the relational character of spatial units, and the functional and formal meanning is determined to the compositional system of design language in space. Therefore this study is the approach about the composition of order in spatial rule. Here, rule is composed of the spatial set according to the composition of units. Developing the composition, the architectural space is constructed. Therefore methodology about the systematic approach have been developed diversly and persistently. In this study, this approach being investigated and analyzing the architectural type, the composition of rule and system is examined to types. Developing the logic, this approach composing the design language is investigated and this applying method is researched.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.558-564
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• 2006

When vehicles pass the connection between the bridge and earthwork, the difference of both sections' stiffness produces an increasing wheelload. As a consequence, it results in the excessive vibration of vehicles and the damage of bearing system. In general, steel plate girder railway bridges without ballast track have larger stiffness than the bridge with ballast, and produces larger impulse on the bridge superstructure. Thus, it is necessary to reduce the differences of both stiffness. This study presents parametric studies on the behavior of plate girder bridges and their tracks by means of various stiffnesses and the length of approach zone. The results of numerical study showed that the smaller the stiffness of both sides and the longer the length of approach zone, the variation of wheelload becomes smaller. Hence, it gives less burden into the plate girder bridges and their tracks. It is expected that the results of parametric study can be used as a preliminary data for the determination of economical length on the approach zone and the stiffness of both sides.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
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• pp.848-855
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• 1989

By structural comparison of process optimization strategies based on Simultaneous Modular Approach, they can be classified into two groups : the Sequential Module Based Approach and the Two-Tier Approach. The Sequential Module Based Approach needs rigorous models and a set of accurate solutions are guranteed. However, it requires large amount of computation time. In the Two-Tier Approach composed of rigorous and simplified models, optimization calculation uses simplified models, therefore comparatively smaller amount of computation time is required but the obtained solutions may not be accurate. These optimization problems were somewhat improved by the alternate application of the two strategies. In this study, improved optimization strategy is suggested, in which Jacobian Matrix is modified to accomodate the strong points of above mentioned strategies. The results of case study show that this approach is superior to the other strategies.