• 디지털융복합연구
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• 제17권9호
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• pp.55-60
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• 2019

농어민 계층은 대표적인 정보소외계층으로 알려져 있다. 이러한 측면에서 농어민 계층들이 PC사용을 통하여 혜택을 받도록 하는 것은 국가정책의 하나가 되어 있다. 따라서 본 연구는 2017년 디지털정보격차 실태조사의 자료를 토대로 농어민 계층의 PC이용능력이 그들의 삶의 만족도에 어떠한 영향을 미치는지를 분석하고자 한다. 특히 인터넷서비스 이용의 매개역할을 검증한다. 경로모형을 토대로 분석한 결과, PC이용능력은 삶의 만족도에 유의한 긍정적 영향을 주는 것이 확인되었다. 또한 인터넷서비스 이용은 PC이용능력과 삶의 만족도와의 관계에서 부분적으로 매개효과를 가지고 있었다. 이를 통해 정부는 농어민의 PC이용능력 배양과 동시에 인터넷서비스 이용을 적극 권장하여 삶의 만족도가 향상될 수 있도록 할 필요가 있다. 향후 연구에서는 위계적 선형모형을 적용하여 지역별 차이를 고려한 세밀한 정책적 연구를 제안한다.

• 한국통신학회논문지
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• 제26권8A호
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• pp.1378-1387
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• 2001

인터넷 서비스의 다양화와 네트워크의 대형화로 인하여 서브 도메인(Subdomain) 및 도메인을 포함한 인터넷 전체에 걸쳐 적용할 수 있는 계층적 구조의 보안 모델의 정의와 이 모델을 기반으로 하는 보안 정책 프로토콜의 표준화가 요구되고 있다. 이 논문에서는 기존 보안 정책 서버 구조를 기존의 Internet-Draft 문서를 통해 분석하고 그것을 바탕으로 계층적 보안 정책 구조를 제시한 후 보안 정책 연동 프로토콜을 설계한다. 이를 위해 보안정책 프로토콜을 확장하고 그룹개념을 위한 질의와 레코드를 확장 설계하고 계층적 보안 모델에서 효과적인 보안정책 상속 및 수정을 위한 갱신 레코드를 정의한다. 또한 동일한 정책 속성을 갖는 호스트들의 모임을 그룹으로 정의하고, 이 개념을 기반으로 효율적인 연동 메커니즘을 설계한다.

• 아동학회지
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• 제29권5호
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• pp.285-299
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• 2008

This study examined the moderating role of self-control and emotion regulation in the relationship between academic stress and mental health among Korean adolescents. The Korean Youth Panel Study (KYPS) was used as sample data with a total of 3121 $11^{th}$ grade students involved in this study. Hierarchical multiple regression was applied to test the moderation model following Baron & Kenny's (1986) model. Results revealed that self-control (for male adolescents) and emotion regulation (for female adolescents) played the role of moderators in the relationship between academic stress and mental health problems. Academic stress proved to have a negative effect on mental health of adolescents.

• 대한간호학회지
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• 제45권1호
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• pp.76-83
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• 2015

Purpose: The purpose of this study was to investigate factors that influence sexual intercourse among middle school students in South Korea. Methods: Using statistics from the 8th (2012) Korea Youth Risk Behavior Web-based Survey, hierarchical logistic regression analysis was conducted. The study sample comprised 37,297 middle school students aged primarily 12 to 15. Results: The significant predictors of sexual intercourse were grade, ever smoking, ever drinking, habitual or purposeful drug use, economic status, weekly allowance, cohabitation with family, and type of school. Conclusion: The results suggest that intensified sex education is needed not only in the 1st grade of middle school, but also in the upper grades of elementary school. Sexual health interventions for high-risk groups may be needed, given the factors predicting sexual intercourse.

• 대한교통학회지
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• 제14권1호
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• pp.101-116
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• 1996

Increased attention has been paid in recent years to the need of traffic management for alleviating urban traffic congestion. This paper presents a discrete event modeling and simulation framework for analyzing the traffic flow. Traffic simulation models can be classified as being either microscopic and macroscopic models. The discrete event modeling and simulation technique can be basically employed to describe the macroscopic traffic simulation model. To do this, we have employed the System Entity Structure/Model Base (SES/MB) framework which integrates the dynamic-based formalism of simulation with the symbolic formalism of AI. The SES/MB framework supports to hierarchical, modular discrete event modeling and simulation environment. We also adopt the Symbolic DEVS (Discrete Event System Specification) to developed the automated analysis methodology for generating optimal signal light policy. Several simulation tests will demonstrates the techniques.

• Industrial Engineering and Management Systems
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• 제12권1호
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• pp.63-72
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• 2013

The aim of this paper is to analyse the impacts of R&D cooperation and obstacles to technological innovation on the innovation failure of the Korean manufacturing firms. Two hierarchical regression models including interaction variables are employed for the analysis. Some interesting findings are: first, almost all the obstacles have positive and significant effects on the failure. Second, R&D cooperation positively or negatively moderates the impact of obstacles to technological innovation on the innovation failure, although R&D cooperation itself is not directly related to the failure. Third, the interaction effects between the cooperation and the obstacles influence the failure in various manners. This study is expected to help manufacturing firms which are under unfavourable environments to formulate their cooperation strategies successfully based on what they learn from the failure.

• 기술혁신연구
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• 제12권1호
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• pp.271-285
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• 2004

The purpose of this paper is an application of AHP in the problem of exportable nuclear technology selection based on data gathered from nuclear experts. In this paper, the decision criteria for evaluating export competitiveness of nuclear technologies are identified and the hierarchical structure of decision making process is developed systematically. Subsequently the values of weights for relative importance among decision criteria are derived using AHP methodology, and the score of importance of nuclear technologies with respect to each criterion is evaluated. Finally the score indicating exportability of each nuclear technology is quantified in order to prioritize then. We discuss implications of our results with a viewpoint of national nuclear technology policy.

• 농촌지도와개발
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• 제27권3호
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• pp.145-158
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• 2020

Self-esteem and social supports are important variable influencing adjustment to college life. The study aims to identify the factors influencing college students' adjustment moderating effects on social supports. Data were collected from 265 usable questionnaires among college students in Pyeongtek University. Results of a factor analysis yielded three dimensions of self-esteem which were talent/attitude and capacity/pride. And results of factor analysis also yielded three dimensions of social supports which were family, friends, and professor supports. Hierarchical regression analysis revealed that capacity/pride and all of social support factors affected significantly for adjustment to college life. And female and attitude for students' major had a positive affect on adjustment to college life. It was suggested that self-esteem, social supports, and aptitude for students' major should be considered in college management policy.

• 지역사회간호학회지
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• 제29권1호
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• pp.21-32
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• 2018

Purpose: This study attempted to identify regional disparities of self-rated health among Korean wage workers and to investigate the influencing factors on them. Methods: The study subjects were 25,069 workers in 16 regions who were extracted from the 2014 Korean Working Condition Survey (KWCS). A multilevel analysis was conducted by building hierarchical data at individual and regional level. Results: In this study, 'financial autonomy rate' and 'current smoking rate' were identified as regional factors influencing the workers' self-rated health. When the socio-demographic and occupational factors of the workers were controlled, 'current smoking rate', a health policy factor, explained the regional disparity of workers' health status. Conclusion: We found that the health status of workers can be affected by the health behavior level of the whole population in their residential area. In order to improve the health status of working population and to alleviate their regional health inequalities, it is necessary to strengthen macro and structural level interventions.

• 정보통신설비학회논문지
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• 제8권4호
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• pp.216-222
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• 2009

This paper proposes an integrated mobile sink networks management system which can monitor and control various kinds of wireless lan access points, located in many different areas divided by their managing groups, from multi-vendors, and their operations in networks. The proposed system has the center-local interoperability structure cooperating with local-center servers which can perform the same operations as the central servers for wireless lan access points from multi-vendors and wireless lan centric management features. For this purpose, we propose a new way of data design, messaging policy, and hierarchical system structure such that we can achieve stable and consistent management methods for various wireless access points on distributed networks.