• Journal of applied mathematics & informatics
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• v.12 no.1_2
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• pp.219-231
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• 2003

This paper aims to study the problem of combined harvesting of a system involving one predator and two prey species fishery in which the predator feeds more intensively on the more abundant species. Mathematical formulation of the optimal harvest policy is given and its solution is derived in the equiblibrium case by using Pontryagin's Maximum principle. Dynamic optimization of the harvest policy is also discussed by taking E(t), the combined harvest effort, as a dynamic variable. Biological and bioeconomic interpretations of the results associated with the optimal equilibirum solution are explained. The significance of the constraints required for the existence of an optimal singular control are also given.

• Agribusiness and Information Management
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• v.2 no.1
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• pp.117-128
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• 2010

Coordination has been identified as a concern in the cross-cutting issues of food security and nutrition (FSN) in Cambodia. Food Security and Nutrition Information System (FSNIS) in Cambodia is the only "entry portal" to support policy formulation and decision-making with regard to FSN. While this knowledge and information management system has earned a respectful reputation, Council for Agricultural and Rural Development (CARD) faces many challenges in the implementation of the system. This paper will present how FSNIS has been developed and impacts on policy or strategy related to FSN. In addition, sustainability of the system is a key challenge for FSNIS; yet it is interesting to see how it works. Along with a success story, FSNIS is recognized by its stakeholders as the most successful knowledge and information management system in the field of FSN in Cambodia.

• Journal of Science and Technology Studies
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• v.3 no.1 s.5
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• pp.105-156
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• 2003

This paper aims to explore the cause and aspect of inter-ministerial policy conflict and its coordination in science and technology policy-making with the case of science and technology basic law-making process in Korea. This law-making processes are analysed through the three periods for the last 10 years starting 1992, such as law-formulation(1st) period, interim law-making (2nd) period, and final law-making(3rd) period. Based on these steps, it tries to concretely describe the phenomenon of policy conflict and the coordination mechanism among government departments and analyses the characteristics of dynamic interaction and mutual adjustment among the related agencies. The analysis is mainly focussed on the underlying causes and determinants of policy conflict, the development and coordination process of the conflict, the strategies and logics of the conflict participants, and eliciting some policy implications for effective policy coordination among government departments. Research results are summarized as follows. First, in science and technology policy-making the main causes of policy conflict among government departments are attributed to the difference of policy-orientation and jurisdiction-orientation of each agency. During the first period, the main aspect of policy conflict was policy-oriented, during the second, the main aspects of policy conflict were both policy-oriented and jurisdiction-oriented, and during the third, policy-oriented conflict was dominant. Second, the dominant typology and strategies of policy coordination which the participants used were vertical-political and horizontal-analytic approach. During the first period, horizontal and analytical approach were used, during the second, horizontal and political approach are mixedly used, and during the third, vertical and political approach were dominantly used. Third, The Korean National Assembly and the ruling party played a pivotal role in science and technology policy-making process(the basic law-making process) in particular during the final period.

• Nuclear Engineering and Technology
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• v.51 no.5
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• pp.1355-1364
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• 2019

A recently published nuclear forensics methodology for source discrimination of separated weapons-grade plutonium utilizes intra-element isotope ratios and a maximum likelihood formulation to identify the most likely source reactor-type, fuel burnup and time since irradiation of unknown material. Sensitivity studies performed here on the effects of random measurement error and the uncertainty in intra-element isotope ratio values show that different intra-element isotope ratios have disproportionate contributions to the determination of the reactor parameters. The methodology is robust to individual errors in measured intra-element isotope ratio values and even more so for uniform systematic errors due to competing effects on the predictions from the selected intra-element isotope ratios suite. For a unique sample-model pair, simulation uncertainties of up to 28% are acceptable without impeding successful source-reactor discrimination. However, for a generic sample with multiple plausible sources within the reactor library, uncertainties of 7% or less may be required. The results confirm the critical role of accurate reactor core physics, fuel burnup simulations and experimental measurements in the proposed methodology where increased simulation uncertainty is found to significantly affect the capability to discriminate between the reactors in the library.

• Health Policy and Management
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• v.34 no.1
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• pp.4-16
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• 2024

Smart hospitals involve the use of recent ICT (information and communications technology) technologies to improve healthcare access, efficiency, and effectiveness. Standardization in smart hospital technologies is crucial for interoperability, scalability, policy formulation, quality control, and maintenance. This study reviewed relevant international standards for smart hospitals and the organizations that develop them. Specific attention was paid to robotics in smart hospitals and the potential for standardization in this area. The study used online resources and existing standards to analyze technologies, standards, and practices in smart hospitals. Key technologies of smart hospitals were identified. Relevant standards from ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) were mapped to each core technology. Korea's leadership in smart hospital technology were highlighted. Approaches for standardizing smart hospitals were proposed. Finally, potential new international standard items for robotics in smart hospitals were identified and categorized by function: sampling, remote operation, delivery, disinfection, and movement tracking/contact tracing. Standardization in smart hospital technologies is crucial for ensuring interoperability, scalability, ethical use of artificial intelligence, and quality control. Implementing international standards in smart hospitals is expected to benefit individuals, healthcare institutions, nations, and industry by improving healthcare access, quality, and competitiveness.

• Korean journal of communication and information
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• v.58
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• pp.242-261
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• 2012

This study was intended to analyze media in education policy from the governance perspective and suggested some orientations and innovative ideas to a new governance in media in Education. For these purposes, this study reviewed related literature about media in education and governance policy and drew a governance model of educational community as an analytic scheme to understand a governance approach to orientation-order-performance of Schmank. Thereafter, the study analyzed formulation and implementation processes of media in education policy, based on some criteria to operate the model, and also analyzed the policy governance in a comprehensive way. Based on the results, this study suggested recommendations to innovate current media in education governance as follows: (1) working towards an idea of operative cooperation through reforms (2) constructing a rational policy system to incorporate socio-political variables, and (3) activating cooperative governance to transform 'governing' into 'governance'.

• Journal of Energy Engineering
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• v.23 no.4
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• pp.150-159
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• 2014

Since the release of mid-term domestic GHG goals until 2020, in 2009, some various GHG reduction policies have been proposed. There are two types of modeling approaches for identifying options required to meet greenhouse gas (GHG) abatement targets and assessing their economic impacts: top-down and bottom-up models. Examples of the bottom-up optimization models include MARKAL, MESSAGE, LEAP, and AIM, all of which are developed based on linear programming (LP) with a few differences in user interface and database utilization. In this paper, we suggest a simplified LP formulation and how can build it through step-by-step procedures.

• Journal of Digital Convergence
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• v.9 no.6
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• pp.39-55
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• 2011

Since telecommunications reforms began around world in the 1980s, many scholars have attempted to uncover its effects on the telecommunications sector. Nevertheless, research focusing largely on the impact of privatization on universal service has been relatively less frequent than other research on telecommunications reform such as the effect of competition on efficiency, investment, and universal service, and the impact of privatization on efficiency. From this perspective, this study attempted to explain the impact of the privatization of a state-owned telecommunications enterprise on universal service in Korea. This work may contribute to providing policy-makers and scholars in telecommunications with some useful policy suggestions by concretely illustrating how the privatization of Korea Telecom has influenced universal service policy formulation and the universal service system in Korea.

• Journal of Environmental Policy
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• v.9 no.1
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• pp.3-29
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• 2010

This paper explores how effectively the newly introduced planning process - California Senate Bill No. 375 will achieve the regional GHG emissions target under the California policy and planning framework and how well incentive based environmental policy might perform. The new legislation creates a future growth scenario to reduce greenhouse gas (GHG) emissions with incentives as means of implementation of AB 32 - the Global Warming Solution Act of 2006 and includes five important policy and planning aspects: 1) the role of sustainable communities strategies (SCS) as one of the key elements in their regional transportation plans; 2) planning for transportation and housing; 3) specified incentives for the implementation of SCS; 4) the regional planning approach toward reducing GHG emissions; and the role of the California Air Resources Board to establish the regional GHG emissions target. This has significant implications for regional and environmental planning with incentives - resources allocation and approval process.

• Health Policy and Management
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• v.20 no.4
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• pp.1-18
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• 2010

Much policy attention has been directed to the concentration of patients in large hospitals, especially in tertiary care hospitals. In order to address the problem, the government has enforced referral requirement for accessing care in tertiary care hospitals by denying insurance benefits to the patients who do not observe the requirement. This approach somehow has failed to produce expected effects although it still exists in theory. The concentration of patients in a certain type of providers results in the distortion of functional differentiation among various types of providers and vice versa. Thus the approaches for the alleviation of the problem should be directed to both patients and providers. However, policy approaches has so far focused on ways of directly affecting patients' choice of a provider neglecting the effects of providers. Based upon the observation, this paper has reviewed selected issues that should be considered in agenda setting for policies concerned with the concentration of patients in large hospitals or the distortion of functional differentiation among health care providers. A brief discussion of each of the issues suggests three general guidelines for the formulation and implementation of policies intended to address the problem. First, attention should be directed to both patients and providers. Secondly, it is necessary to employ diverse measures including regulation, incentives and administrative supports. Thirdly, some of the approaches should be planned from a long range perspective, for it often takes a long time to change some aspects of health care utilization and provision.