• Title/Summary/Keyword: reuse system

Search Result 1,045, Processing Time 0.026 seconds

Reuse of KBS components

  • Oussalah, M.;Messaadia, K.
    • Proceedings of the Korea Inteligent Information System Society Conference
    • /
    • 2001.01a
    • /
    • pp.385-392
    • /
    • 2001
  • This paper proposes a meta modeling technique which permits to describe a KBS according to three axis: the object of reuse axis, the levels of granularity axis and the reuse process axis. The object of reuse axis allows to see a KBS as a set of inter-related components for reuse purposes. The levels of granularity axis allows to describe the KBS components according to different levels of granularity for clarity and reuse purposes. The reuse process axis allows to see the KBS components as (re)usable components.

  • PDF

A Study on the Design and Implementation of an Application Program Reuse System based on common language (범용언어에 의한 응용 프로그램 재사용 시스템의 설계 및 구현)

  • O, Mu-Song;Kim, Hyeong-Tae
    • Asia pacific journal of information systems
    • /
    • v.4 no.2
    • /
    • pp.83-130
    • /
    • 1994
  • Software development of large scale program such as Operating System or University Total Information System is lengthy and costly process. In order to reduce cost, time and risk, there is currentry general acceptance of the need for Software Reuse System during the whole development cycles. In this paper, (from a practical point of view), the problem of existing reuse system methodology is analyzed and an implement method of software reuse system is presented. Also using this method Application Program Reuse System(APRS) which supports all phase of software life cycles is designed and implemented. This application program reuse system which is based on common language is considerably shown to reduce communication Error of requirement specification between systems analyst and end-user.

  • PDF

Modeling for Measurement of Class Reusability in Object-Oriented Programs (객체 지향 프로그램에서 클래스 재사용성 측정 모델링)

  • Yun, Hui-Hwan;Gu, Yeon-Seol
    • The Transactions of the Korea Information Processing Society
    • /
    • v.6 no.3
    • /
    • pp.580-588
    • /
    • 1999
  • The reuse of software components from existing software system enhances productivity and reliability, decreases the cost of production in software development. The extraction of software components with high reusability from existing software system is very important in software reuse. The reuse of a class is classified into white-box reuse to reuse with modification and black-box reuse to reuse without modification. A class has the property of procedural language and object-oriented language. Therefore, it must measure reusability in consideration of two properties. In black-box reuse, independence of class is important quality. It can quantify through information hiding, coupling between objects, cohesion, etc. In white-box reuse, modification is the best important quality. It can quality through class complexity, coupling, cohesion, documentation, etc. We propose a new model for measurement of class reusability and the measure criteria in object-oriented program. A class that is measured by proposed model can judge whether the reuse with modification has the advantage or the reuse without modification has the advantage.

  • PDF

Measurement of Irrigation water-reuse ratio for pumped storage system (양수저류시스템의 반복이용률 측정)

  • Park, Ji-Sung;Kim, Young-Hwa;Lee, Young-Il;Kim, Pil-Dong
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 2003.10a
    • /
    • pp.295-298
    • /
    • 2003
  • In this study, It classified type of irrigation water development in islands district. As result, the types which were type of reservior, fleshwater lake, pumped storage, ets. Most of islands district has developed reuse irrigation system as a pumped storage system. But, Irrigation water-reuse ratio doesn't define a basis clearly and the value of measurement for water-reuse ratio doesn't exist so far. so, we measured Irrigation water-reuse to clarify for water-reuse ratio in a pumped storage system.

  • PDF

Code-Reuse Attack Detection Using Kullback-Leibler Divergence in IoT

  • Ho, Jun-Won
    • International journal of advanced smart convergence
    • /
    • v.5 no.4
    • /
    • pp.54-56
    • /
    • 2016
  • Code-reuse attacks are very dangerous in various systems. This is because they do not inject malicious codes into target systems, but reuse the instruction sequences in executable files or libraries of target systems. Moreover, code-reuse attacks could be more harmful to IoT systems in the sense that it may not be easy to devise efficient and effective mechanism for code-reuse attack detection in resource-restricted IoT devices. In this paper, we propose a detection scheme with using Kullback-Leibler (KL) divergence to combat against code-reuse attacks in IoT. Specifically, we detect code-reuse attacks by calculating KL divergence between the probability distributions of the packets that generate from IoT devices and contain code region addresses in memory system and the probability distributions of the packets that come to IoT devices and contain code region addresses in memory system, checking if the computed KL divergence is abnormal.

A Study on the Dynamics of the Quality, Satisfaction, and Reuse Intention of Community Social Services (지역사회서비스 품질, 만족도, 재이용의사의 동태성에 관한 연구)

  • Cho, Sung-Sook
    • Korean System Dynamics Review
    • /
    • v.13 no.2
    • /
    • pp.73-91
    • /
    • 2012
  • This study aims to comprehensively understand the dynamics between the factors related to service quality, satisfaction and reuse intention. The contents of the study are as follows. First, it draws the limitations of the existing studies by reviewing the literature related to the relationships between service quality, satisfaction and reuse intention. Second, it highlights the characteristics of System Dynamics as a means of overcoming their shortcomings as well as examining the dynamic mechanism of the relevant factors. Third, it explores the feedback loops of the relevant key variables and the feedback structure of the system. Lastly, it concludes with the suggestions and implications of the key research findings. This study is expected to emphasize the importance of the feedback mechanism operating around the service quality, satisfaction, and reuse intention. Further, the causal loop diagram developed can be a basic material for the diverse levels of governments as well as service providers to refer to for improving the service quality of Community Social Service Investment Program.

  • PDF

The status quo and developing measurement of water reuse in China

  • Li, Wei;Li, Jing;Wang, Yiwen;Zhong, Yuxiu;Liu, Hongxian;Li, Peilei
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2015.05a
    • /
    • pp.228-228
    • /
    • 2015
  • Water reuse plays significant role in water saving and water environmental protection, and it helps alleviate the shortage of water resources. China's water reuse was put into practice since 1980s by means of pilot and promotion in National Fifth-year Plan and other strategies. The effects of water reuse is beneficial in both economic, social and environmental aspects. But some shortcomings still undermine future development of water reuse in China. To overcome and boost water reuse, Ministry of Water Resources conducted a successive survey across China. The aim of this study is to demonstrate the current condition of water reuse in China in construction, funds, legislation, planning, policy aspects, to summarize problems and its reasons underneath, to make suggestions for further development. Basically, in 2010, China's water reuse is 2.83 billion cubic meters and the utilization rate is 10.35%. Water reuse in China has four major characteristics: the first one is water reuse differences in amount occur national-widely and North of China has the main percentage as 47.3%; the second one is water reuse is mainly in environment maintenance (42.1%) and industry cooling (29.8%); the third one is funds for water reuse station and pipe construction is main in non-fiscal budget which take percentage as 56.8%; the fourth one is progresses of administrative system, political system, price management, standard system and technologies go rapidly recently. The problems of water reuse such as lack in water reuse station, delay in pipe constriction and limits on water reuse amount still exist due to some reasons. As a think tank of Ministry of Water Resources, we give some suggestions: firstly, water reuse needs to be integrated with traditional water resources allocation; secondly, public budgets need to be strengthened and income mechanism should also be constructed; thirdly, water resources integrated administrative of city and county should be boosted and roles as water reuse need to be clear and precise; fourthly, national, provincial and regional water reuse planning should be made in time; fifthly, regulations on water reuse should be programmed as soon as possible.

  • PDF

Case-Based Reasoning Framework for Data Model Reuse (데이터 모델 재사용을 위한 사례기반추론 프레임워크)

  • 이재식;한재홍
    • Journal of Intelligence and Information Systems
    • /
    • v.3 no.2
    • /
    • pp.33-55
    • /
    • 1997
  • A data model is a diagram that describes the properties of different categories of data and the associations among them within a business or information system. In spite of its importance and usefulness, data modeling activity requires not only a lot of time and effort but also extensive experience and expertise. The data models for similar business areas are analogous to one another. Therefore, it is reasonable to reuse the already-developed data models if the target business area is similar to what we have already analyzed before. In this research, we develop a case-based reasoning system for data model reuse, which we shall call CB-DM Reuser (Case-Based Data Model Reuser). CB-DM Reuse consists of four subsystems : the graphic user interface to interact with end user, the data model management system to build new data model, the case base to store the past data models, and the knowledge base to store data modeling and data model reusing knowledge. We present the functionality of CB-DM Reuser and show how it works on real-life a, pp.ication.

  • PDF

Economic Analysis of Wastewater Reuse Systems for Agricultural Irrigation using a System Dynamics Approach (시스템 다이내믹스를 이용한 농업용수 재이용시스템 경제성 분석)

  • Jeong, Han Seok;Suh, Kyo;Jang, Tae Il;Seong, Choung Hyun;Kim, Hak Kwan;Park, Seung Woo
    • Journal of The Korean Society of Agricultural Engineers
    • /
    • v.55 no.2
    • /
    • pp.9-20
    • /
    • 2013
  • Many studies have reported additional treatment is needed to use wastewater for agricultural purpose. Economic considerations should be taken into account to establish infrastructure for agricultural reuse because of a large amount of water use in irrigation and relatively low water quality requirement. The objective of this study was to conduct economic analysis of wastewater reclamation and reuse systems for agriculture. A system dynamics approach considering complexity and dynamics in the wastewater reuse systems was used for the economic analysis, which are related with social, environmental, and economic problems. Sensitivity and benefit cost analysis for wastewater reuse systems was conducted through the established economic assessment model. The result of sensitivity analysis showed that water resources development and installation cost were the most sensitive for total benefits and costs, respectively. The scenario-based test of the organized economic assessment model shows marginal cost ranges and enables decision-makers to decide reasonable cost for the wastewater reuse systems for agriculture.

Capacity Improvement with Dynamic Channel Assignment and Reuse Partitioning in Cellular Systems

  • Chen Steven Li;Chong Peter Han Joo
    • Journal of Communications and Networks
    • /
    • v.8 no.1
    • /
    • pp.13-20
    • /
    • 2006
  • In cellular mobile communications, how to achieve optimum system capacity with limited frequency spectrum is one of the main research issues. Many dynamic channel assignment (DCA) schemes have been proposed and studied to allocate the channels more efficiently, thus, the capacity of cellular systems is improved. Reuse partitioning (RP) is another technique to achieve higher capacity by reducing the overall reuse distance. In this paper, we present a network-based DCA scheme with the implementation of RP technique, namely dynamic reuse partitioning with interference information (DRP-WI). The scheme aims to minimize the effect of assigned channels on the availability of channels for use in the interfering cells and to reduce their overall reuse distances. The performance of DRP-WI is measured in terms of blocking probability and system capacity. Simulation results have confirmed the effectiveness of DRP-WI scheme. Under both uniform and non-uniform traffic distributions, DRP-WI exhibits outstanding performance in improving the system capacity. It can provide about 100% capacity improvement as compared to conventional fixed channel assignment scheme with 70 system channels.