OSI implementations in Korea

Research and development on OSI became a key issue in many Korean R&D projects related to computer, telecommunications and services. The Korean computer and communications industry also finds their possible area of expansion through OSI-compatible products. But claiming OSI as the future direction in Korea at the national/government level is not near. This short paper presents various present and future R&D projects on OSI in Korea. These include ISDN, LAN, Videotex, Teletex, protocol testing, mixed mode terminal, network architecture etc.     

R&D project evaluation model based on fuzzy set priority

Most of the conventional concepts used by the R&D project evaluation models do not seem to be appropriate for modeling the imprecision R&D project evaluation. This paper is concerned with the project evaluation by aggregating the multiple rank-ordered sets based on fuzzy set priority. First the rank-ordered priority lists of the R&D projects were determined based on the majority-rule methods, then the aggregate fuzzy set rank order was computed and compared with the others. Finally, we have developed a systemic and practical program suitable for a simple and easy calculation of all the algorithms. It was found that our model was validated by the comparative computations in various R&D project examples.     

Protocol testing techniques

This paper deals with testing techniques for communication protocols. Several protocol testing support systems designed for testing protocol layers of the ISO/OSI (International Standards Organisation/Open Systems Interconnection) Reference Model are introduced. These systems are mostly designed for the conformance testing of protocols produced by third parties, which is intended not only to provide test services for both suppliers and users but also to meet the requirements of standards. Several test case generation methodologies are described, and the authors' experience in using one of the methods is presented.     

An intelligent adaptive system for the optimal variable selections of R&D and quality supply chains

The cost of research & development (R&D) and quality management are always regarded as two major parts of total cost. The variable performance of R&D and quality design is an important index that will reflect the effectiveness of the cost reduction. This research has attempted to simultaneously vary all of the variables to achieve the global optimum for the optimal variable selections of R&D and quality design. Genetic algorithm (GA) can treat all of the variables for the global search. In this study, fuzzy refinement with orthogonal arrays was effective in improving the performance of the GA, and also showed the benefits of a good chromosome structure on the behavior of GA. It is also proposed the postponement design with temporal concept, to select the effective variables for the cost reduction of R&D and quality management design. The experimental results showed that tempo-postponement design will increase the flexibility and quick response for supply chain management. Hence, this approach can act as a useful guideline for researchers working on the optimization of the key variable selections for R&D and quality model design.     

OSI参考模型工程实现的最近进展

ＯＳＩ参考模型问世以来，世界上许多组织机构都在采取措施推广ＯＳＩ的应用。近年来，在制定国际通用的标准可选功能集和产生普遍接受的网络测试结果方面做了大量的工作，使得ＯＳＩ标准更为实用。本文以美国国家标准技术研究院的“政府部门开放系统互连可选功能集”（ＧＯＳＩＰ）及相应的测试组织工作为主，介绍以上两个方面的发展动向。     

A decision support system for inventory management in high research & development environment

Inventory management is being discussed recently as one of the key elements for survival and success in the production industry today. Little efforts were made to solve inventory problems in the Hi R&D environment.

In this paper, a prototype of a Microcomputer Based Decision Support is introduced to support decisions for managing Hi R&D inventories. The decisions involve timing and scheduling of purchased components, as well as classification of those items.     

A heuristic program for reliability and maintainability allocation in complex hierachical systems

A new and computationally efficient heuristic algorithm is developed for reliability and maintainability (R&M) allocation in complex hierarchical systems (CHS). This approach has advantage over other available methods in that mean-time-to repair (MTTR) and other R&M parameters are estimated at the component level before desing. The R&M allocation is achieved by decomposing the system R&M state space into a hierarchy of subsystems and reformulating the problem as a reliability network equivalent.     

Emerging network security standards in an OSI environment

This paper examines the work currently in progress in harmonising Security Standards for open distributed networking. In particular, it examines the progress made by ISO on the Security Framework for OSI. This is followed by a brief overview of work on security standards which is currently taking place in ISO and other standards bodies, as well as what can be expected in the future.     

表示层协议一致性测试的研究与实现

表示层协议是ＯＳＩ高层协议的一部分。文中介绍协议一致性测试的研究现状、测试过程及基本测试方法,分析表示层协议一致性测试需求;采用抽象语法表示（ＡＳＮ．１）与树表格式（ＴＴＣＮ）相结合的形式化描述语法,设计实现了表示层协议核心部分一致性测试系统及测试集;测试系统通过了对ＩＳＯＤＥ软件表示层协议实现的一致性测试。表示层协议一致性测试系统,是协议一致性测试系统（ＰＣＴＳ）的一个子系统。这个子系统的功能实     

防火墙及其在OSI环境中的应用

防火墙是用来保护一个网络受外界侵犯的一种有效手段,其设计实现机制是多种多样的。目前防火墙大都用于ＴＣＰ／Ｉ协方,但数据通讯产品的政府规范文件通常要求采用管方国际标准,例如国际标准化组织制定的标准。     

Manufacturing technology in Korea

This article describes a general overview of industry development, present status and future perspectives of manufacturing technology in Korea. The Advanced Manufacturing System project, which is one of the national R&D projects in manufacturing technology, is introduced. The problems for the future development of manufacturing technology in Korea is discussed.     

Bluetooth协议栈一致性测试

Bluetooth协议栈实现的一致性测试是保证不同厂商产品之间互连与互操作的基础。文章基于OSI协议一致性测试标准进行了Bluetooth协议一致性测试研究和实际测试,并以L2CAP层协议为例介绍了一致性测试的方法、结构、测试集的设计生成与完备性分析。     

A datagram-based network architecture for microcomputers

Current developments in protocol standards for local area networks are not suitable for small microcomputers with limited storage and processing capability. A suitable distributed systems architecture that is based on datagrams is presented. Compatibility with the ISO/CCITT seven-layer OSI model is maintained where possible, and internetworking is supported.     

On the application of CAD technology for the synthesis of spatial revolute–revolute dyads

This work presents a method based on Computer Aided Design or CAD for facilitating the synthesis of Revolute–Revolute (R–R) dyads with adjustable moving pivots. The CAD-based method presented in this work ensures that all prescribed rigid-body parameters used to synthesize the R–R dyad satisfy particular kinematic requirements of an R–R dyad. Through the application of this CAD method, five of the six general R–R dyad constraint equations are satisfied and therefore not essential for the synthesis of the R–R dyad. By reducing the number of dyad design constraints from six to one, the user can synthesize R–R links with adjustable moving pivots for multi-phase motion and path generation applications. The example included demonstrates the use of the CAD method in the synthesis of an RRSS path generator with adjustable moving pivots.     

基于高级Petri网的OSI网络协议描述与验证

本文对ＯＳＩ参考模型进行了全面的分析，并介绍了一种高级Ｐｅｔｒｉ网，称为ＥＰｒ／Ｔ网系统，该系统可作为ＯＳＩ网络协议的形式描述工具，然后，利用ＥＰｒ／Ｔ网系统对（Ｎ）层通信协议进行了形式描述，并阐明了ＯＳＩ网络协议形式描述的一般方法。最后，对协议的有界性、活性和回归性等性质进行了验证。     

A computer-based model for system level reliability and maintainability allocation

This paper describes computer-based heuristic models for Reliability and Maintainability (R&M) allocation for large systems. The model is an embellishment to the Maintenance Allocation Program (MAP) developed at McDonnell Douglas Corporation. The new version of MAP known as REMAP (Reliability Embellished MAP) is a decision support tool for contractors who are involved in large scale design projects such as aircraft design. The REMAP allows the user to give preliminary R&M information about the system. The REMAP gives “what if” changes on the requirements required to meet the desired design reliability specification.     

UK government activities in support of OSI

The UK Department of Trade and Industry has taken a considerable and active interest in the development of osi standards. It is now undertaking a number of measures to consolidate these developments and establish a critical quantity and quality of OSI products and services. These measures include application studies, demonstrator projects, conformance testing services and the requirement to use OSI in value-added services.