• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권4호
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• pp.1404-1423
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• 2015

In smart grid, electricity consumption data may be handed over to a third party for various purposes. While government regulations and industry compliance prevent utility companies from improper or illegal sharing of their customers' electricity consumption data, there are some scenarios where it can be very useful. For example, it allows the consumers' data to be shared among various energy resources so the energy resources are able to analyze the data and adjust their operation to the actual power demand. However, it is crucial to protect sensitive electricity consumption data during the sharing process. In this paper, we propose a fine-grained access control scheme (FAC) with efficient attribute revocation and policy updating in smart grid. Specifically, by introducing the concept of Third-party Auditor (TPA), the proposed FAC achieves efficient attribute revocation. Also, we design an efficient policy updating algorithm by outsourcing the computational task to a cloud server. Moreover, we give security analysis and conduct experiments to demonstrate that the FAC is both secure and efficient compared with existing ABE-based approaches.

• 전기학회논문지
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• 제65권7호
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• pp.1135-1143
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• 2016

A private company's 1,000 MW coal-fired power plant will be the first coal-fired power plant that was included in the 5th 'Basic Plan on Electricity Demand and Supply' (2010). Now it is facing the task to abide by the RPS(Renewable Portfolio Standard) policy after commercial operation. If they fail to supply the necessary REC (Renewable Energy Certificate) mandated by the RPS policy, they are subject to be fined by the government and forced to modify the cost function to reflect the burden. Eventually the company's coal-fired power plant will be forced to reduce generation to maximize profit because the amount of electricity generated by the power plant and the REC obligation is positively correlated. This paper analyzed the change of cost function of private coal-fired power plant according to the introduction of RPS policy from the viewpoint of private company, and finally proposed the optimal generation to maximize the profit of private coal-fired power plant under the current RPS policy.

• 로봇학회논문지
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• 제16권2호
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• pp.137-146
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• 2021

When controlling manipulator, degree of freedom is lost in singularity so specific joint velocity does not propagate to the end effector. In addition, control problem occurs because jacobian inverse matrix can not be calculated. To avoid singularity, we apply Deep Deterministic Policy Gradient(DDPG), algorithm of reinforcement learning that rewards behavior according to actions then determines high-reward actions in simulation. DDPG uses off-policy that uses 𝝐-greedy policy for selecting action of current time step and greed policy for the next step. In the simulation, learning is given by negative reward when moving near singulairty, and positive reward when moving away from the singularity and moving to target point. The reward equation consists of distance to target point and singularity, manipulability, and arrival flag. Dual arm manipulators hold long rod at the same time and conduct experiments to avoid singularity by simulated path. In the learning process, if object to be avoided is set as a space rather than point, it is expected that avoidance of obstacles will be possible in future research.

• Journal of Preventive Medicine and Public Health
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• 제54권3호
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• pp.173-181
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• 2021

The National Health Plan 2030 (HP2030) started to be prepared in 2017 and was completed and announced in December 2020. This study presents an overview of how it was established, the major changes in policies, its purpose, and future directions. This study analyzed the steps taken in the past 4 years to establish HP2030 and reviewed major issues at the international and governmental levels based on an evaluation of HP2020 and its content. HP2030 establishes 6 divisions and 28 topic areas, and it will continue to expand investments in health with a total budget of 2.5 trillion Korean won. It also established goals to enhance health equity for the first time, with the goal of calculating healthy life expectancy in a way that reflects the circumstances of Korea and reducing the gap in income and healthy life expectancy between regions. The establishment of HP2030 is significant in that it constitutes a sustainable long-term plan with sufficient preparation, contains policy measures that everyone participates in and makes together, and works towards improvements in universal health standards and health equity. With the announcement of HP2030, which includes goals and directions of the national health policy for the next 10 years, it will be necessary to further strengthen collaboration with relevant ministries, local governments, and agencies in various fields to concretize support for prevention-centered health management as a national task and to develop a health-friendly environment that considers health in all policy areas.

• 한국산업융합학회 논문집
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• 제25권6_3호
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• pp.1303-1313
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• 2022

Modern cities need to revitalize the downtown area, which is declining due to population decline, economic recession, and deterioration of the residential environment, economically, socially, and physically by introducing and creating new functions. In addition, the hollowing out of the existing city center is getting worse due to the development of the outskirts of the city. Therefore, the discussion for the development of urban regeneration is the core task of modern cities. This study analyzed based on a basic understanding of urban regeneration projects, and through this, the problems of domestic urban regeneration projects were derived. In addition, the problem factors and major improvement plans of the urban regeneration project were analyzed from the expert's point of view using the AHP analysis technique. Based on this, the purpose is to present policy alternatives for the future development of urban regeneration projects. The problems derived to present the policy alternatives and improvement directions of the urban regeneration project were classified into problems related to goal achievement, problems related to the business itself, and problems related to project results. It was subdivided into sub-categories. This study analyzed the problem factors and major improvements from the expert's point of view by using the AHP analysis technique for the problems of the urban regeneration project. Based on the AHP analysis results and experts' opinions, five policy alternatives for the development of urban regeneration projects were presented.

• 시스템엔지니어링학술지
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• 제20권1호
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• pp.34-49
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• 2024

Since the outbreak of COVID-19, 'overcoming infectious disease' has emerged as a priority task for most policies. Each country has implemented policy programs to significantly shorten the vaccine development period with the goal of rapid vaccine development. This study judged this process to be a shock to the existing social and technological system and its recovery. Accordingly, the United States' Operation Warp Speed, CEPI's 100 days mission, and Japan's SCARDA were selected as examples of policy programs with 'rapid vaccine development' as their mission and analyzed difference from traditional vaccine development system in terms of rapid development. As a result, it was confirmed that the accumulation of innovative resources was shared as the key to achieving the mission in the preparation stage before the outbreak of an infectious disease. However, it was also possible to discover an approach to shortening the period of each stage without fundamentally changing the vaccine development structure itself.

• 산학경영연구
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• 제18권2호
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• pp.197-223
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• 2005

21세기 산업 클러스터 정책이 지역경제 활성화의 핵심 수단으로 부상하면서 정책 대상으로서의 클러스터 도출(identification) 및 확인(mapping) 연구의 중요성이 부각되고 있다. 본 연구에서는 지역단위의 클러스터에 대한 사례연구를 통하여 클러스터 지향적 정책과제(focused cluster policy)의 도출하고, 지역산업 클러스터의 네트워크를 파악함에 있어서 타 클러스터와의 비교 및 시계열별 비교, 정책목표의 달성정도 평가를 위하여 클러스터 평가지표를 제시하고자 하였다. 산업클러스터 사례분석은 클러스터 유형화분석과 네트워크분석을 통해 이루어졌다. 연구결과 요약하면, 클러스터를 개발하려는 시도는 다른 지역에서 성공한 클러스터를 모방하기보다는 경쟁우위와 전문성을 토대로 추진되어야 하고, 산업정책과 다른 산업클러스터 정책을 개발해야하고, 시장지향적인 클러스터 생태계를 구축해야 하며, 각 지역 여건 및 산업특성에 적합한 혁신체제를 구축과 혁신창출의 인프라를 조성해야 한다는 것이다.

• 디지털융복합연구
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• 제14권5호
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• pp.207-215
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• 2016

본 연구는 직무스트레스가 직무특성과 조직유효성 간의 관련성에 미치는 영향을 실증적으로 분석하였다. 이를 위해 부 울 경 지역의 중소기업 중 제조업 및 서비스업에 종사하는 근로자를 대상으로 설문조사를 실시하여 379개의 데이터를 수집하였다. 본 연구결과에 의하면, 역할갈등, 역할모호성, 역할과다 수준에 따라 직무특성과 조직유효성 간의 관련성에 일부 차이가 있는 것으로 나타났다. 따라서 본 연구에 의하면 다양한 직무특성을 활용하여 조직유효성을 높이고자 하는 중소기업들의 경우 직무스트레스를 적절히 통제하는 것이 조직유효성 증대에 유용할 것으로 판단된다. 또한 향후 대기업과 중소기업간의 비교를 통한 보다 심도 있는 연구를 기대한다.

• 디지털융복합연구
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• 제18권5호
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• pp.405-410
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• 2020

국가 연구개발 사업의 과제 평가는 신청된 과제 중에서 기술성 또는 사업화 가능성이 높은 과제를 선별하기 때문에 고도의 전문성 및 객관성, 공정성이 요구된다. 이를 위해 신청된 각 세부과제의 기술 분야 전문가가 해당 과제의 계획서를 중점적으로 검토하게 된다. 그러나 평가 과정에서 평가 위원의 평가 지표 점수가 같다고 하더라도 평가 위원의 평가 의견이 동일하다고 판단할 수 없으며, 실제 적용되는 평가 지표의 가중치가 다르게 적용될 수 있다는 문제점이 있다. 본 연구에서는 국가 연구개발 사업의 선별 평가를 위한 각 지표별 평가 기준을 객관화하여 과제 평가 선정의 오차를 줄이고, 평가의 전문성 및 공정성을 향상시킬 수 있는 AHP 기반 국가 연구개발 과제 평가 기준 결정 시스템을 제안하였다. 본 연구를 통해 국가 연구개발 사업의 지표별 평가 기준을 객관화할 수 있었으며, 부여된 가중치 배점을 이용하여 각 지표별 평가 기준을 산정하는 과정에서 각 분야의 전문가의 전문성 및 공정성을 확보할 수 있었다.

• 정보화정책
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• 제23권3호
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• pp.84-116
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• 2016

본 연구는 지방정부 정보화 조직의 경쟁력 강화를 위해 업무, 구조, 관계적 역량을 진단하고 조직발전 모델을 제시하는 것을 목적으로 한다. 연구 대상은 한국 17개 광역자치단체의 정보화 부서이며, 조직 변화에 대한 통시적 관찰, 조직 간 비교, 심층 인터뷰 등 다각적 방법으로 지방정부 정보화 조직의 현실적 문제를 담아내고자 하였다. 분석결과, 첫째, 업무 측면의 경우, 새로운 정보통신기술의 도입, 업무 구분 및 조정, 창의적 정책 탐색에서 문제를 보였다. 둘째, 구조 측면에서는 부서 위치 및 명칭, 인력, 공식적 권한, 조직문화 등 공식적 비공식적 원인에 의해 조직 위상이 저하되어 있다. 셋째, 관계측면에서는 전담부서-현업부서 간, 정부 간, 정부-민간 간 관계에서의 주도적인 역할 변화가 필요한 것으로 진단되었다. 이와 같은 조직문제를 개선하기 위해 본 연구는 지방정부와 조직이 처한 상황에 따라 적용할 수 있는 'Relation Model, Resource Model, Curation Model, Creation Model'을 구상하고 이의 실현을 위한 업무, 구조, 관계 역량 강화 전략을 제시하였다.