• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.129-132
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• 2012

클라우드 환경을 구성하는 자원을 능동적으로 사용 하기 위해서는 부하분산 정책이 필요하며 효율적으로 작업을 할당하고 공유할 수 있는 자원 관리 스케줄링이 필요하다. 또한 자원의 경제성을 유념하여 클라우드 서비스 제공자의 이익 창출과 자원 활용도의 개선을 실현해야하고 서비스 사용자의 만족도를 향상시켜야 한다. 본 논문에서는 계층형 부하분산 정책을 이용한 비용이익 기반 자원관리 스케줄링 모델(Cost-benefits Based Resource Management Scheduling Model using Hierarchical Load Balancing Policy)을 제안한다. 제안하는 모델은 계층형 부하분산 정책을 적용하여 자원을 통합, 관리함으로서 개선된 유지보수성을 제공하며, 서비스 제공자의 비용이익을 고려하여 각 자원들마다의 자원협상 메커니즘과 비용이익을 우선으로 하는 가격 결정 알고리즘을 제공하여 합리적인 자원 할당이 가능하다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.209-218
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• 2018

The purpose of this study was to explore the relationship between the subjective consciousness and life satisfaction of the elderly, and to see how depression affects this relationship. This includes a new way of thinking about the causes of the elderly's life satisfaction, not only for individual factors, but also for subjective class consciousness. For this aim, we examine the degree of subjective class consciousness, life satisfaction and depression of the elderly, and verify mediation effects of depression between subjective class consciousness and life satisfaction. This study utilized data obtained from the 5th version of the Korea Longitudinal Study on Aging 2014, and considered data from 4,222 elderly aged 65 and over. As a means of study, a structural equation model analysis was conducted. The results were as follows: First, it was confirmed that the subjective class consciousness of the elderly may influence life satisfaction. It was also confirmed that the subjective class consciousness of the elderly also affected depression and life satisfaction among the elderly. When subjective class consciousness was high, depression was low and life satisfaction was high. When depression was low, life satisfaction was high. Second, depression had the mediation effect in which subjective class consciousness affects life satisfaction. Based on these results, this author suggests practical and political issues concerning social welfare to prevent and reduce depression and increase life satisfaction through improving the subjective class consciousness of the elderly. First, policy measures should enhance social capital through housing support policies and leisure use support to enhance the subjective class consciousness of the elderly. Second, the provision of services for the elderly through the establishment of a community-based network to reduce depression should be promoted.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.6
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• pp.1087-1101
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• 2020

Various security devices are used to protect internal networks and valuable information from rapidly evolving cyber attacks. Firewall, which is the most commonly used security device, tries to prevent malicious attacks based on a text-based filtering rule (i.e., access control policy), by allowing or blocking access to communicate between inside and outside environments. However, in order to protect a valuable internal network from large networks, it has no choice but to increase the number of access control policy. Moreover, the text-based policy requires time-consuming and labor cost to analyze various types of vulnerabilities in firewall. To solve these problems, this paper proposes a 3D-based hierarchical visualization method, for intuitive analysis and management of access control policy. In particular, by providing a drill-down user interface through hierarchical architecture, Can support the access policy analysis for not only comprehensive understanding of large-scale networks, but also sophisticated investigation of anomalies. Finally, we implement the proposed system architecture's to verify the practicality and validity of the hierarchical visualization methodology, and then attempt to identify the applicability of firewall data analysis in the real-world network environment.

• Journal of Convergence for Information Technology
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• v.12 no.2
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• pp.17-22
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• 2022

Currently, the housing supply rate exceeds 100%, and the penetration rate continues to increase. This housing supply rate is changing from quantitative supply-oriented to improving the quality of the residential environment in housing service policies. Despite the increase in the housing supply rate, practical access to the vulnerable class is still difficult and there are many areas that are insufficient to use housing services when necessary. In addition, the demand for residential services is increasing due to the expansion of the scope of the vulnerable class. In order to compensate for these problems, facilities and joint occupancy that cannot guarantee independent living are mainly established, although a supply plan is established for the vulnerable by expanding policies and support projects. This paper proposes an IoT environment-based housing support system for vulnerable groups to support housing services for vulnerable groups. The proposal system improves the quality of the residential environment and provides service-oriented support services. Through the proposal system, appropriate social participation opportunities can be provided by improving the quality of life of the vulnerable and supporting a residential environment where independent living is possible.

• 월간산업보건
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• s.262
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• pp.9-14
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• 2010

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.2B
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• pp.192-202
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• 2004

In this paper we have proposed policy-based network management system architecture for Internet QoS support Mobile IP networks that is divided into four layers(application layer, information management layer, policy control layer, device layer), then we propose an implementation strategy of policy-based network management system to enforce various control and network management operations and a model of policy server using SCOPS(Simple Common Open Policy Service) protocol that is developed in this research. For policy-based mobile IP network management system implementation, we have derived four policy classes(access control, mobile IP operation, QoS control, and network monitoring) and we showed operation procedures for each policy scenarios. Finally we have implemented Internet QoS support policy-based mobile IP network testbed and management system and verified out DiffServ policy enforcement behaviors for a target class service that is arranged a specific bandwidth on network congestion conditions.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.05a
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• pp.537-547
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• 2017

현재 우리나라의 GDP 대비 R&D 투자 규모는 세계최고의 수준에 이르렀다. 이러한 연구개발 예산의 양적인 확대 및 성장과 함께 상대적으로 연구개발 예산의 효율적 활용이 중요한 과학기술정책 이슈로 부각되고 있다. 본 연구는 정부 R&D사업 유사영역의 효율성 제고를 위한 정책, 전략의 수립 및 실행의 의사결정을 돕는 데이터 기반의 객관적인 지표들을 제시하였다. 그 후 본 연구에서 제시한 효율성 지표들을 NTIS에서 추출한 2015년 정부출연연구기관 R&D 사업 데이터와 연계하여 실질적으로 측정과 사용이 가능한 정량적 지표들만을 따로 선별하였다. 또한 정부 R&D사업 효율성 지표들의 가중치를 측정하기 위하여 계층분석기법(analytic hierarchy process)을 수행하였으며 계층분석기법의 결과로 나온 가중치를 효율성 지표들에 적용하여 과제 우선순위를 도출하였다. 이를 통해 정책의 수립, 실행 및 조정 시 고려해야 할 지표의 우선순위를 설정하여 유사연구영역 관련 정부 R&D 정책수립에서 실행까지의 연계를 강화시키고 국가적으로 한정된 자원의 효율적 사용을 위한 방안을 제시하였다.

• The Journal of the Korea Contents Association
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• v.20 no.7
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• pp.602-617
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• 2020

The aim of this study is to evaluate the effects of income-led growth path induced by government and consumption expenditures. Six of Nordic countries, Latin American countries and South Korea are selected for this purpose due to the fact that these countries have been pursuing income-led growth policy for more than the last decade except South Korea. The structural equation is formulated based on the government and consumption expenditures with lagged variable, and the GLMs estimation is employed for empirical analysis. Although the impacts are not overwhelmingly effective, empirical evidence suggests that income-led growth path contributes to stimulate economic activities which are associated with increasing in national income in Nordic countries and South Korea. However, the income-led growth path is quite weakly operated. Furthermore, it is even unstable in Latin American countries. In addition to this, the policy target would rather be focused on middle consumption group than low consumption group. Overall, it would be concluded that the income-led growth policy should be implemented for complementary purpose. And, it also has to be mentioned that sustainable growth may not be achievable by this policy.

• Journal of Korea Port Economic Association
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• v.28 no.4
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• pp.209-229
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• 2012

There have been lots of studies on locational factors of companies, but, very few studies for Korean shipping companies. This study analyzes locational factors for Korean shipping companies using AHP(Analytic Hierarchy Process) method. For the study model, the first level is consisted by software, hardware and city policy factors. As more specific factors, the second level is formed by three factors of the first level. The third level consists of Seoul and Busan to evaluate competitive advantage for location of shipping companies. We carried out an analytical survey focused on the executives of shipping companies and related experts, and derived the priority order for locational factors of Korean shipping companies as follow. Firstly, software factors turned out the most important factor for location of Korean shipping companies. Next, Busan has a competitive advantage only in city policy factors. However, there are much of competitive disadvantages in both software and hardware factors for location of shipping companies compared against Seoul.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.499-501
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• 2004

본 논문에서는 네트워크의 구성 정보를 바탕으로 상위 수준에서 하위 수준으로 정책을 변환할 때 나타나는 기존 정책과의 충돌을 탐지하고 순응시키는 메커니즘을 소개한다. 대규모 네트워크는 라우터, 스위치, 방화벽 침임 탐지 시스템, 일반 호스트 등과 같은 다양한 종류의 장비로 구성되어 있으며. 이러한 것들은 각기 다른 접근 일 제어 형식을 가지고 있다. 따라서 트래픽에 대한 일괄적인 통제가 어렵고, 외부의 공격에 대한 신속하고 효과적인 대응이 불가능하다. 또한 대규모 네트워크를 구성하고 있는 장비들을 제어하기 위해서는 그러한 장비들이 포함되어 있는 서브 네트워크의 세부 점보와 각 장비의 고유한 설정 규칙을 필요로 한다. 이러한 점은 대규모 네트워크를 상위 수준의 계층에서 관리를 어렵게 한다. 때문에 하부 계층의 구조나 정보와는 독립적으로 추상화된 고수주의 보안 정책 설정을 위한 도구가 요구된다 이것은 상위 수준의 보안 정책 표현 기법, 하위 수준의 보안 정책 기법, 상위 수준의 보안 정책과 네트워크 구성 정보를 바탕으로 하위 수준의 보안 정책을 도출하는 기법 하위 수준의 보안 정책을 실제 네트워크 구성 요소에 적용하는 기법 등의 네 가지 연구로 구분된다. 본 논문에서는 이 네 가지의 연구와 기법을 바탕으로 관리 네트워크에 새로운 정책이 전달될 때 기존의 단순한 정책 선택을 벗어난 서로의 정책을 변환한 ACL을 최대한 순응시키는 메커니즘을 제안한다