• Title/Summary/Keyword: reuse system

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Fractional Frequency Reuse with Sub-channel Borrowing (부분적 주파수 재사용의 성능 향상을 위한 sub-channel 차용 기법)

  • An, Jong-Wook;Cho, Seung-Moo;Lee, Tae-Jin
    • Proceedings of the IEEK Conference
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    • 2008.06a
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    • pp.259-260
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    • 2008
  • This paper presents fractional frequency reuse (FFR) with sub-channel borrowing to improve spectral efficiency of the wireless broadband (WiBro) system. FFR has constraints on usable sub-channels to balance the interference and cell capacity. Our FFR with sub-channel borrowing allows use of the dedicated sub-channels assigned to neighboring cells. Simulation results show that the proposed FFR with sub-channel borrowing improves the performance of the WiBro system.

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Component-Based VHDL Analyzer for Reuse and Embedment (재사용 및 내장 가능한 구성요소 기반 VHDL 분석기)

  • 박상헌;손영석
    • Proceedings of the IEEK Conference
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    • 2003.07b
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    • pp.1015-1018
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    • 2003
  • As increasing the size and complexity of hard-ware and software system, more efficient design methodology has been developed. Especially design-reuse technique enables fast system development via integrating existing hardware and software. For this technique available hardware/software should be prepared as component-based parts, adaptable to various systems. This paper introduces a component-based VHDL analyzer allowing to be embedded in other applications, such as simulator, synthesis tool, or smart editor. VHDL analyzer parses VHDL description input, and performs lexical, syntactic, semantic checking, and finally generates intermediate-form data as the result. VHDL has full-features of object-oriented language such as data abstraction, inheritance, and polymorphism. To support these features special analysis algorithm and intermediate form is required. This paper summarizes practical issues on implementing high-performance/quality VHDL analyzer and provides its solution that is based on the intensive experience of VHDL analyzer development.

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A Metric of Component Extraction for Package based Object Oriented Codes (패키지 중심의 객체지향 코드의 컴포넌트 추출을 위한 메트릭)

  • 이종호;류성열
    • The Journal of Society for e-Business Studies
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    • v.8 no.2
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    • pp.113-129
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    • 2003
  • Component-based software development (CBSD) has been recognized effective reuse techniques for software development by many of researchers and companies. The purpose of CBSD is to produce a high quality software system quickly through using verified software component which is contained fine-grained business logics. This paper suggests the metrics and techniques for to extract component and its interface from legacy object oriented application. For extract component, we apply metrics to measure complexity, cohesion and coupling to the legacy system.

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Applying Object-Oriented Technology for Development PDM Framework (객체 지향 기술을 이용한 PDM 프레임워크 개발)

  • Kim, Jeong-A
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.5
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    • pp.1377-1387
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    • 2000
  • Many companies are investing in the development of the PDM(Prodct Data Management) system to improve the productivities of manufacturing since people believe that PDM technology can give a new solution from planning to development. As the requirements of PDM grows, so many industries sped their own budget on developing common requirements and functionalities. In this paper, we describe the framework for a PDM application to promote reuse in a PDM system development area. However, developing the framework is not easy. In this paper, the current state and results of our development are described: 1) the phases of developing our framework, 2) abstruction strategies, 3) programing model based on repository. Although frameworks improve software reuse, frameworks are so large and complex that application developers require to understand framework in order to customize the framework. To support the customization of framework, development environment is developed, also.

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Electronic Commerce Using on Case-Based Reasoning Agent (사례기반추론 에이전트를 이용한 전자상거래)

  • 허철회;조성진;정환묵
    • The Journal of Society for e-Business Studies
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    • v.5 no.2
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    • pp.49-60
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    • 2000
  • A major topic in the field of network and telecommunications is doing business on the Word Wide Web(WWW), which is called Electronic Commerce(EC). Another major topic is blending Artificial Intelligent techniques with the WWW. To provide customer with the information of goods in suit with a customer liking, we propose multi agent system which is consist of customer agent and search agent etc. Also we use case-based reasoning for customer liking searching the information of goods and training through the reuse. This reuse make efficient management of information and a process of operation. In the relation between customer and goods, if there are some goods which is not search from case-base reasoning, we calculate satisfaction function for customer purchase goods. And to provide customer with the information of goods in the first of satisfaction function, This EC system can always provide the information of goods which is satisfied to customer.

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Advanced Victim Cache with Processor Reuse Information (프로세서의 재사용 정보를 이용하는 개선된 고성능 희생 캐쉬)

  • Kwak Jong Wook;Lee Hyunbae;Jhang Seong Tae;Jhon Chu Shik
    • Journal of KIISE:Computer Systems and Theory
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    • v.31 no.12
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    • pp.704-715
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    • 2004
  • Recently, a single or multi processor system uses the hierarchical memory structure to reduce the time gap between processor clock rate and memory access time. A cache memory system includes especially two or three levels of caches to reduce this time gap. Moreover, one of the most important things In the hierarchical memory system is the hit rate in level 1 cache, because level 1 cache interfaces directly with the processor. Therefore, the high hit rate in level 1 cache is critical for system performance. A victim cache, another high level cache, is also important to assist level 1 cache by reducing the conflict miss in high level cache. In this paper, we propose the advanced high level cache management scheme based on the processor reuse information. This technique is a kind of cache replacement policy which uses the frequency of processor's memory accesses and makes the higher frequency address of the cache location reside longer in cache than the lower one. With this scheme, we simulate our policy using Augmint, the event-driven simulator, and analyze the simulation results. The simulation results show that the modified processor reuse information scheme(LIVMR) outperforms the level 1 with the simple victim cache(LIV), 6.7% in maximum and 0.5% in average, and performance benefits become larger as the number of processors increases.

Visual Component Assembly and Tool Support Based on System Architecture

  • Lee, Seung-Yun;Kwon, Oh-Cheon;Shin, Gyu-Sang
    • ETRI Journal
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    • v.25 no.6
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    • pp.464-474
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    • 2003
  • Component-based development leverages software reusability and reduces development costs. Enterprise JavaBeans (EJB) is a component model developed to reduce the complexity of software development and to facilitate reuse of components. However, EJB does not support component assembly by a plug-and-play technique due to the hard-wired composition at the code level. To cope with this problem, an architecture for EJB component assembly is defined at the abstract level and the inconsistency between the system architecture and its implementation must be eliminated at the implementation level. We propose a component-based application development tool named the COBALT assembler that supports the design and implementation of EJB component assembly by a plug-and-play technique based on the architecture style. The system architecture is first defined by the Architecture Description Language (ADL). The wrapper code and glue code are then generated for the assembly. After the consistency between the architecture and its implementation is checked, the assembled EJB components are deployed in an application server as a new composite component. We use the COBALT assembler for a shopping mall system and demonstrate that it can promote component reuse and leverage the system maintainability.

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A Study on the Validity and Benefit-Cost of Labeling System for Reuse Wreath (재사용화환 표시제도 도입 타당성 및 비용-편익에 대한 연구)

  • Heo, Seung-Wook;Yang, Sung-Bum
    • Korean Journal of Organic Agriculture
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    • v.28 no.3
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    • pp.335-346
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    • 2020
  • The objective of this study is to analyze the consumer perception of reusable wreath and present the considerations for introducing the labeling system, and to calculate the social benefits and costs of that. For this, We did an internet survey on the perceptions and willingness-to-pay for reuse wreath to 330 adults. As a result, only 56.1 percent of those who ordered wreath were found to check whether they actually arrived. 73.6% of the respondents had the willingness-to-purchase a reusable wreath if the price was reasonable, and 43.6% were in favor of labeling reused wreath as 'reused wreath'. The social benefits of introducing the reusable currency marking system are about 155,692 million won and the social cost about 43.52 million won. If reusable wreath are not recognized and purchased at the price of new one, economic and emotional losses of domestic horticulture farmers and consumers may occur. Therefore, related agencies will be able to expand sales of domestic flower producers and protect the economic and emotional benefits of consumers if they make efforts to establish and operate a reusable wreath labeling system.