• Journal of Korean Society of Transportation
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• v.32 no.6
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• pp.567-578
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• 2014

The study suggested a method to improve analysis accuracy such that the interactive effects of transportation changes between outside and inside of sub-areas were sequentially considered in the analysis by linking a macroscopic network analysis and a microscopic traffic simulation. A dynamic O/D estimation method was developed for practical implement of sub-area microscopic simulation analysis by using the results of macroscopic network analysis, the results of selected link analysis at the cordon line of the sub-area, departure time data of household travel survey, timely observed traffic volume data at the cordon. This estimated dynamic O/D for the sub-area made it possible to analyze traffic phenomena in details. Various detailed phenomena such as traffic queues, delay at intersection, and conflicts between vehicles, which is impossible to be grasped through a macroscopic analysis, can be analyzed with the dynamic microscopic traffic analysis. Through implementing an empirical study and validation, the study provided a reference result about accuracy of a microscopic traffic simulation of a sub-area to help its application for real transportation policy analysis.

• Journal of Hospice and Palliative Care
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• v.22 no.1
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• pp.30-38
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• 2019

Purpose: This study analyzed a path through which factors influencing death anxiety in the community-dwelling elderly, assuming personal organismic factors and microsystemic factors based on the ecology model purported by Belsky (1980). Methods: This study was performed with 189 elderly people. Data were collected through a self-report questionnaire. The data were analyzed using the SPSS and AMOS programs. Results: The factors influencing death anxiety in the elderly were depression, family support, social network, and familism value, and the explanatory power of these variables was 22%. Death anxiety increased with higher depression, higher familism value, larger social network, and lower family support. Spiritual well-being and elderly discrimination experience had indirect effects on death anxiety, and these effects were mediated by depression. Conclusion: Depression, family support, social network, and familism value were found to influence death anxiety in the elderly, and the strongest effect came from depression. To reduce death anxiety in the elderly, it is important to improve their relationship with their family and friends. Moreover, support should be provided by establishing local systems, and intervention should be provided to alleviate depression.

• Journal of the Korea Convergence Society
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• v.8 no.11
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• pp.423-430
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• 2017

The purpose of research is analyzing the ecological variables on the effect of child care teacher's happiness. The data was collected by the survey of the happiness factors and ecological variables of child care teachers. The results are listed below. First, of organismic variable, the age and the educational background of child care teacher showed discrimination one's happiness. Second, of micro system variable, the marital status is the only thing that affect the happiness. Third, of meso system variable, the teachers who are highly interact on each other such as, child to teacher and parents to teacher are much happier than others. Finally, of the outside system variable, the teachers who are working at the better working environment and good quality of duty are much happier than others.

• Journal of Korean Library and Information Science Society
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• v.38 no.2
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• pp.373-397
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• 2007

The purpose of this paper is to discuss marketing strategies for school library. The writer divided marketing environment of school library into macro-external environment, micro-external environment, substantial environment, and operational environment. And analyzed characteristics of four target audiences-school administrator, teachers, students, and parents and local society-for school library marketing and suggested approach strategies to each target audiences. Four communication strategies of school library media specialist for effective marketing are discussed ; administrative communication, behavioral communication, cooperative communication, and social communication.

• KIEAE Journal
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• v.14 no.5
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• pp.123-130
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• 2014

In order for effective heat island reduction policies to be proposed, this research made use of the land usage and land coverage and Temperature of cities, Coordinate axis data within 500 meters of nationwide automatic weather stations (478 points) in order to analyze the correlation of summertime temperatures through multiple regression analysis. This research also developed a model and empirically analyzed the urban heat island reduction effect of factors that affect regional temperatures. Heat islands cause environment deterioration and therefore can harm citizens' health, and also affects the city's metabolism process. Thus in order to restrain regional temperature rises the conclusion was drawn that consideration to increase forest areas on part of land usage planning is needed. Appropriate policy measures to regulate traffic related factors are also needed to restrain regional temperature rises. In order for future heat island reduction this research proposes a way to set up more effective policies and urban sustainability improvement strategies, and is significant in that it makes use of detailed data such as land usage and land coverage, Temperature of cities, Coordinate axis in analyses.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2002.11a
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• pp.247-254
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• 2002

과학기술이 더 가까워질 미래사회로 갈수록 전력은 신규수요와 대체수요의 증가로 지금보다 많은 량의 공급을 요구할 것이다. 이 때문에 환경문제에 있어 전력산업의 영향이 커지고, 이로 인해 전력의 청정공급 체계 구축은 국제규범의 수립과 함께 국민복지나 환경보존의 차원에서 필연적이다. 따라서 LCA는 청정생산을 위한 분석능력을 갖추고, 이를 바탕으로 점차 완전한 민영화 상태에서 경쟁구도로 이어질 전력산업 참여자들의 기업가치 극대화에 기여할 필요성이 대두된다. 이를 위해 본 연구에서는 LCA의 역할 확산 경로를 거시적으로는 국제규범과 소비자 만족 그리고 미시적으로는 기업의 가치 극대화와 환경경영체제 수립이라는 측면에서 이루어져야 할 것으로 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.991-994
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• 2008

네트워크 이동성(Network Mobility: NEMO)은 하나 이상의 서브넷으로 이루어진 전체 네트워크가 인터넷 접속점을 동적으로 변화하여 네트워크 접근성도 변화하는 환경을 말한다. 이러한 환경에서 경로 최적화를 위한 여러 프로토콜들이 존재하지만 그중 Prefix Delegation 기법은 다른 기법들에 비해 다방면에서 우수하다. 그러나 본질적으로 바인딩 갱신 스톰(storm) 문제를 수반하기에 NEMO 환경에서의 바인딩 갱신 비용을 최소화 하기위한 연구가 대두하였다. 본 논문에서는 바인딩 갱신 비용의 최소화를 위하여 바인딩 갱신 시 멀티캐스트 기법을 적용하였으며, 경로 최적화 프로토콜은 Prefix Delegation 기법 중 바인딩 갱신 비용을 효율적으로 고려한 IPD[1]를 가정하였다. 성능평가를 위해서 수학적 모델링을 적용하였으며, 본 모델을 통하여 기존 방법들에 비하여 상당한 비용절감 효과를 얻을 수 있음을 보인다.

• Journal of Conservation Science
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• v.32 no.4
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• pp.521-534
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• 2016

Ancient tombs are typically comprised of confined rooms, which have different spatial characteristics than the external environment because they are covered by heavy layers of soil. In this study, we examined the thermal energy flow from the outside to inside of Songsan-ri tomb No. 6. External heat flows slowly to the inside because of heavy soil layer, and the presence of several rooms and entrances. For this reason, it takes about two months for the air temperature to travel from the outside to the inside of the tomb. Interestingly, the gradational inflow of thermal energy from outside the tomb leads to delicate horizontal and vertical variations in the wall temperature. These micro-environmental differences occur in the inner tomb every year, so we can expect them to cause condensation with regularity. In addition, we show that the previously installed forced circulation air conditioning system risks fatal damage to the mural wall painting. The results of this research suggest an optimal air conditioning system and optimized space planning to conserve Songsan-ri tomb No. 6 and its mural painting.

• Journal of Environmental Policy
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• v.13 no.3
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• pp.75-107
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• 2014

For the purpose of carbon mitigation, Korea needs to introduce stronger market-based economic incentives to promote environmentally-friendly behaviors of consumers. In particular, the government could consider introducing tax benefits on income taxation for green consumption, as well as public education and campaign, to stimulate environmentally-friendly consumption behaviors. In this respect, using an analysis of Input-Output and Household Income and Expenditure Survey in Korea, this paper designs four major scenarios related to income tax benefits for green consumption, and then explores the economy-wide effects of those proposed policies.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.1
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• pp.60-66
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• 2009

A service network in the future ubiquitous environment can consist of a variety of elements, which include different protocols of the network transport. Interwoking different transport protocols can alleviate such problems occurred in accessing network as poverty of facilities, faults, and contention in a path of particular protocol communication. This paper schemes to improve performance of the network constituted of different protocols for the network transport. Interposing an interwork element, like SDR (Software Defined Radio), in the network can raise availability of transport paths, and then improve transport performance of the overall network Simulation analysis justifies such a scheme and this paper presents simulation results.