• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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• pp.61-64
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• 2003

GPRS is designed for transmitting packet data and supposed to take its radio resource form the pool of channels unused by GSM voice services. In this paper, The GPRS and GSM circuit switched services share the same radio resource. Whenever a channel is not used by circuit switched services, it may be utilized by GPRS. In this paper, the main aim is performance and comparison resource management policies with channel de-allocation in GPRS network. Three resource management policies is voice priority, R-reservation, dynamic reservation.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.222-229
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• 2022

Although stochastic programming and feedback control approaches could efficiently mitigate the overdue risks caused by inherent uncertainties in ground conditions, the lack of formal representations of planners' rationales for resource allocation still prevents planners from applying these approaches due to the inability to consider comprehensive resource allocation policies for hard rock tunnel projects. To overcome the limitations, the authors developed an ontology that represents the project duration estimation rationales, considering the impacts of ground conditions, excavation methods, project states, resources (i.e., given equipment fleet), and resource allocation policies (RAPs). This ontology consists of 5 main classes with 22 subclasses. It enables planners to explicitly and comprehensively represent the necessary information to rapidly and consistently estimate the excavation durations during construction. 10 rule sets (i.e., policies) are considered and categorized into two types: non-progress-related and progress-related policies. In order to provide simplified information about the remaining durations of phases for progress-related policies, the ontology also represents encoding principles. The estimation of excavation schedules is carried out based on a hypothetical example considering two types of policies. The estimation results reveal the feasibility, potential for flexibility, and comprehensiveness of the developed ontology. Further research to improve the duration estimation methodology is warranted.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 춘계 학술대회 논문집
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• pp.36-42
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• 2001

This paper presents the operational planning systems of automated container terminals. The proposed system is composed of berth allocation module, yard planning module, resource allocation module, sequencing module, and simulation module. All the sub-modules except resource allocation module are built into integrated simulation model using simulation package AutoMod. Simulation experiments are performed according to the number of AGVs and AGV allocation policies.

• 한국컴퓨터정보학회논문지
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• 제14권8호
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• pp.81-88
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• 2009

멀티미디어 콘텐츠 서비스 산업의 경쟁이 치열해 지면서 고객만족을 위한 다양한 정책들이 제시되고 있다. 이러한 정책 중에는 서비스를 이용하는 고객들을 분류하여 등급을 산정하고 등급에 따라 미디어 서버의 자원을 고정적으로 할당하는 정책도 있다. 이 정책의 문제점은 값비싼 미디어 서버의 자원을 효율적으로 사용하지 못할 수도 있다는 점이다. 본 논문에서는 이러한 문제점을 해결하기 위하여 ACRFA(Adaptive Client Request Filtering Algorithm)를 제안하고자 한다. 이것은 고객들의 등급을 차등화하고 유연성있는 자원할당 방법을 적용하기 위한 것이다. 높은 등급의 고객에게 더 많은 자원을 할당하게 하여 고객의 만족도를 높이면서 동시에 미디어 서버의 자원의 일부는 등급별로 고정할당하고 나머지 일부는 공용자원으로 활용하게 하는 방안을 제안하고자 한다.

• Journal of Communications and Networks
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• 제14권5호
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• pp.487-494
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• 2012

A standard paradigm for the allocation of wireless resources in communication demands symmetry, that is, all users are assumed to be on equal footing and hence get equal shares of the system's communication capabilities. However, there are situations in which "prime users" should be given priority, as for example in the transmission of emergency messages. We examine prioritization policies that could be implemented at the physical layer and propose a new one, termed interference priority (IP), which is shown to have excellent performance. We evaluate the performance of these prioritization techniques both in controlled settings and within the context of a full cellular system and discuss the impact of prioritized use of resources on the unprioritized users.

• 가족자원경영과 정책
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• 제16권1호
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• pp.41-66
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• 2012

Recently, Korean baby boomers, which make up approximately 15% of the total population, have begun to retire. Their economic well being is one of Korea's most important social issues. The purpose of this study was to compare the economic structure of baby boomers' households with that of the prior generation, as well as to analyze the determinants of economic satisfaction from the perspective of "work" and "child educational burden." In addition, group comparisons were made regarding economic resource allocation between baby boomers and the prior generation and within baby boomers of different work and child educational burden statuses. Data from the 2nd wave of the Korean Longitudinal Study of Ageing (KLoSA), including baby boomers and the generation prior to the baby boomers, were used. The major findings were as follows. First, the baby boomers had a different economic structure, level of economic satisfaction, and economic resource allocation when compared to the prior generation. The economic structure of baby boomers in terms of income, expenditure, savings and assets, debts, and trust in policies significantly differed from their counterparts. Second, the determinants of economic satisfaction and the propensity of resource allocation were different depending on whether they worked or had a child educational burden, respectively. Based on these empirical results, policy implications for the future economic well being of baby boomers were provided.

• Journal of information and communication convergence engineering
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• 제1권3호
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• pp.109-114
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• 2003

There is an emergence of Internet applications that have real-time requirements. These applications require IP to support guaranteed capacity, higher priority and lower packet loss rate. To address this, the Internet Engineering Task Force (IETF) is developing a set of protocols and standards for Integrated Services on the Internet. Using RSVP and policies to manage the allocation of network resources in order to provide different levels of service is a topic of great interest to service providers. Currently, it is not possible to dynamically reallocate resources during an application's session. This paper discusses how policies in conjunction with new service class can provide a more enhanced network resource allocation by allowing for this dynamic reallocation.

• 수산경영론집
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• 제36권3호
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• pp.65-88
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• 2005

The fisheries industry has been changed drastically during the so - called Golden Growth Era of Korea. Recently, WTO/DDA agenda drove industries out of their safe refuges toward infinite competitions in the world. This paper aims at finding out distinguished features in the structural changes of fisheries since 70s. Furthermore, policy implications are investigated in order for the fisheries to survive in the outdoors. The paper consists of the following sections. First, we consider why and for what the structural change of fisheries in historical perspective should be investigated. And we introduce how we can approach to the goal in various aspects in the second section. In the third section, we examine the historical change of Korean fisheries in respect of national economy, resource allocation mechanism, industrial structure, and fisheries society. In the fourth section, we extract the development steps in fisheries from the periodic characteristics, using various methods of the above approaches. And we deduce the next step for Korean fisheries in the future. Finally, we conclude that there needs some turning point of fisheries policies in Korea, striving to foster the fisheries industry in the future. As results of empirical analysis in this paper, we find that fisheries industry in Korea has experienced some momentous changes during 30 years, using I/O data of B.O.K. The weight of fisheries sector in the whole economy of Korea increased during early 70s, initially leading the national economy to export - oriented engine for growth. But fisheries sector has shrunk rapidly since late 70s. Almost resources in Korea were allocated to expanding manufacturing industries. Further, fisheries industry has encountered perfect international competitions since the late 90s. This paper draws that fisheries industry in Korea will jump across to next step of qualitative growth in the future. Therefore, we recommend that the policies should be focused on enhancing the industrial competitiveness, switching quantitative growth to qualitative advance in fisheries.

• 국제학술발표논문집
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• The 10th International Conference on Construction Engineering and Project Management
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• pp.799-806
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• 2024

Construction planners for hard rock tunnel projects often encounter practical challenges caused by inherent uncertainties in ground conditions and resource constraints. Therefore, planners cannot rapidly generate optimal excavation schedules for the shortest project durations with a given equipment fleet by considering the uncertainties in ground conditions. Although some schedule optimization methods exist, they are not tailored for resource-constrained hard rock tunnel projects. To overcome these limitations, the authors specified a formal Q-learning-based schedule optimization methodology for resource-constrained hard rock tunnel projects. States are defined according to the locations of tunnel faces under excavation. Actions consist of multiple and comprehensive heuristic-based rules, which are efficient methods for resource allocation. Rewards are the time intervals required between current states and next states. After that, the methodology is validated using a case study. The generated Q tables indicate (1) best actions under different states and (2) the shortest remaining durations when the project starts from specific (state, action) pairs. The results demonstrate that the optimal schedules can be obtained by applying the proposed methodology. Furthermore, it is beneficial for planners to rapidly assign optimal rules for each state under one ground condition scenario. The results further show the potential to consider the uncertainties in ground conditions using the information of possible ground condition scenarios provided.

• International Journal of Computer Science & Network Security
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• 제21권2호
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• pp.158-170
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• 2021

Virtualization technologies are being adopted and broadly utilized in many fields and at different levels. In cloud computing, achieving load balancing across large distributed virtual machines is considered a complex optimization problem with an essential importance in cloud computing systems and data centers as the overloading or underloading of tasks on VMs may cause multiple issues in the cloud system like longer execution time, machine failure, high power consumption, etc. Therefore, load balancing mechanism is an important aspect in cloud computing that assist in overcoming different performance issues. In this research, we propose a new approach that combines the advantages of different task allocation algorithms like Round robin algorithm, and Random allocation with different threshold techniques like the VM utilization and the number of allocation counts using least connection mechanism. We performed extensive simulations and experiments that augment different scheduling policies to overcome the resource utilization problem without compromising other performance measures like makespan and execution time of the tasks. The proposed system provided better results compared to the original round robin as it takes into consideration the dynamic state of the system.