• Title/Summary/Keyword: Software systems

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A Study for Component-based Integration Framework for Design System using Standard Interface (표준 인터페이스를 이용한 컴포넌트 기반의 설계 자원 시스템 통합에 관한 연구)

  • 이창근;이수홍;방건동
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.703-706
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    • 2001
  • This paper presents a component-based integration framework and its software component architecture for supporting the rapid integration of legacy design supporting systems in the distributed environment. Also, using standard interface, this software component architecture provides flexibility, extensibility and compatibility which ensure software components to be independent of the integration middleware and systems to be integrated.

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Purposes, Results, and Types of Software Post Life Cycle Changes

  • Koh, Seokha;Han, Man Pil
    • Journal of Information Technology Applications and Management
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    • v.22 no.3
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    • pp.143-167
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    • 2015
  • This paper addresses the issue how the total life cycle cost may be minimized and how the cost should be allocated to the acquirer and developer. This paper differentiates post life cycle change (PLCC) endeavors from PLCC activities, rigorously classifies PLCC endeavors according to the result of PLCC endeavors, and rigorously defines the life cycle cost of a software product. This paper reviews classical definitions of software 'maintenance' types and proposes a new typology of PLCC activities too. The proposed classification schemes are exhaustive and mutually exclusive, and provide a new paradigm to review existing literatures regarding software cost estimation, software 'maintenance,' software evolution, and software architecture from a new perspective. This paper argues that the long-term interest of the acquirer is not protected properly because warranty period is typically too short and because the main concern of warranty service is given to removing the defects detected easily. Based on the observation that defects are caused solely by errors the developer has committed for software while defects are often induced by using for hardware (so, this paper cautiously proposes not to use the term 'maintenance' at all for software), this paper argues that the cost to remove defects should not be borne by the acquirer for software.

Development of simulation-based testing environment for safety-critical software

  • Lee, Sang Hun;Lee, Seung Jun;Park, Jinkyun;Lee, Eun-chan;Kang, Hyun Gook
    • Nuclear Engineering and Technology
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    • v.50 no.4
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    • pp.570-581
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    • 2018
  • Recently, a software program has been used in nuclear power plants (NPPs) to digitalize many instrumentation and control systems. To guarantee NPP safety, the reliability of the software used in safetycritical instrumentation and control systems must be quantified and verified with proper test cases and test environment. In this study, a software testing method using a simulation-based software test bed is proposed. The test bed is developed by emulating the microprocessor architecture of the programmable logic controller used in NPP safety-critical applications and capturing its behavior at each machine instruction. The effectiveness of the proposed method is demonstrated via a case study. To represent the possible states of software input and the internal variables that contribute to generating a dedicated safety signal, the software test cases are developed in consideration of the digital characteristics of the target system and the plant dynamics. The method provides a practical way to conduct exhaustive software testing, which can prove the software to be error free and minimize the uncertainty in software reliability quantification. Compared with existing testing methods, it can effectively reduce the software testing effort by emulating the programmable logic controller behavior at the machine level.

A Quantitative Measurement and Evaluation of Software Product Quality (Software 품질의 정량적 측정과 평가)

  • Im Dae-Heug
    • Management & Information Systems Review
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    • v.18
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    • pp.201-222
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    • 2006
  • As the competition between countries has become higher and the notion of software quality has been widely spread. it has been necessary to develop technologies that can ensure and produce high quality software. With the advent of information-oriented society. quality control has to transfer to the quality control activities focused on software system instead of those activities focused on hardware system. If so, how do we get to handle the quality control on the basis of the new approach. Also, as software applications have grown. so too has the importance of software quality. In order to manage software quality, the technology to specify and evaluate both the software product quality and development process quality objectively quantitatively is most important. To produce products of good quality, we need a more progressive quality control system according to the need of software development life cycle. In other words, we do software right the first time or build quality in the process. On the basis intermediate and final time or build quality in the process. On the basis of data achieved, we can evaluate the products according to the consequences of the data, What are the problems to contrive the software quality control system?, we con promote the quality of products. To achieved that goal, we con provide a suitable the technique and method of software quality control.

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Optimal Release Time of Software System having a Fixed Operational Period (일정한 사용기간을 갖는 Software System의 최적방출정책)

  • 최명호;윤덕균
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.13 no.22
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    • pp.1-6
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    • 1990
  • This paper deals with software Release policy having a Fixed Operational period after a Software System is released. The underlying Software Reliability Growth is described by J-M Model Optimal of Software Release Time minimizing Total Expected Cost is Obtained.

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Design and Implementation of Anti-virus Software for Server Systems supporting Dynamic Load Balancing (동적 부하균형을 지원하는 서버용 안티바이러스 소프트웨어 설계 및 구현)

  • Choi, Ju-Young;Sung, Ji-Yeon;Bang, He-Mi;Choi, Eun-Jung;Kim, Myuhng-Joo
    • Convergence Security Journal
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    • v.6 no.1
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    • pp.13-23
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    • 2006
  • It is more desirable to execute AV software on server systems rather than on clients for the minimization of damages due to malicious codes. AV software on server system, however, may aggravate the load of server system. In this paper, we propose a new AV software executed on server system without additional loads with a monitor and multi-agent model. The new AV software supports dynamic load balancing that reflects the features of AV engine, and thus it can be executed efficiently on server systems. The results of performance evaluation on the AV software attest to the strong points of the new AV software.

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A Study on Tool for Software Architecture Design (소프트웨어 구조 설계 지원 도구 개발에 관한 연구)

  • 강병도;이미경
    • Journal of Korea Society of Industrial Information Systems
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    • v.7 no.3
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    • pp.15-22
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    • 2002
  • As the size and complexity of software systems increase, the design and specification of overall system structure become more significant issues than the choice of algorithms and data structures of computation. Software architecture serves as a framework for understanding system components and their interrelationships. Software architectures can be reusable assets to achieve low costs, high productivity, and consistent quality. We have developed a software architecture design environment, called Happy Work. In this paper, we would like to present the structure and functions of Happy Work. Happy Work has two main functions. First, it Provides a graphic editor for modeling of software architecture diagram. Second it provides an ADL, called HWL(Happy Work language). HWL is a language that describes software architect

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A Development of Visualization Software for Protective Engineering in Low-Voltage Power Systems (저압계통 보호 엔지니어링을 위한 시각화 소프트웨어 개발)

  • Yun, Sang-Yun;Lee, Nam-Ho;Lee, Wook-Hwa;Lee, Jin;Kim, Jae-Chul
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.55 no.7
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    • pp.297-305
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    • 2006
  • This paper summarizes a development of visualization software for protective engineering in low-voltage power systems. The study is concentrated on the following aspects. First, a software engineering method is applied for designing the object-oriented program. The design and implementation of a Graphic User Interface(GUI) and its integration to a power system framework are developed using object-oriented programming(OOP) in Visual C++. Second, we develop the short circuit analysis module that oriented a low-voltage power system. It is possible to calculate a peak, symmetrical RMS, DC component and asymmetrical fault currents for each time. And it is the first software that can calculate the fault current for single branch of three-phase system. The calculation accuracy is compared with commercial software, and the libraries of low-voltage components are served for convenience use. Third, protective engineering functions are equipped. It is possible to automatically select the circuit breaker which based on the user input characteristics and the fault current calculation and examine the protective coordination. Through the case study, we verified that the developed software can be effectively used to examine the protective engineering in low-voltage power systems.

Traditional Software Development for WLAN Propagation Model

  • Ibrahim Anwar Hassan;Ismail Mahamod;Jumari Kasmiran;Kiong Tiong Sieh
    • Journal of Electrical Engineering and Technology
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    • v.2 no.1
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    • pp.123-128
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    • 2007
  • SPWPM traditional software development is surveyed and essential problems are investigated on the basis of system wireless link considerations. This paper presents the current state software planning tools for wireless LAN link optimization. The software directory is based on combination of MatLab and MapInfo software and measurement which gives the best grouping parameters to build up the software development. Among the requirements assumed, the WLAN site selections must be Line-of-sight (LOS) or near line of sight (NLOS) field strength prediction for either point to point or point to multi points. The results obtainable the out put of the program include two-dimensional (2D) and three dimensional (3D) plots for creating the link; design parameters through GUI representing the height and location for each antenna is depending on K-factor of the area and transmit antenna location.

An Analysis Tool for Flight Test of Airborne Display Software (항공기 시현계통 소프트웨어의 비행시험을 위한 분석도구)

  • Lee, Yong-Rae;Choi, Eu-Teum;Jun, Yong-Kee
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.46 no.11
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    • pp.961-968
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    • 2018
  • Airborne display systems provide pilots with a variety of information needed to operate aircraft. Software faults in the display system can seriously affect the operation of the aircraft, because it can provide inaccurate information to the pilot. Therefore, the software faults are identified and eliminated through ground testing and flight testing. This paper presents an analysis tool called FDR (flight data replay) for flight test of airborne display software. This tool works in real time with the mission computer of aircraft. Also, the tool reproduces the functional error conditions that appear in the display systems by applying flight test data to the display software.