Computer Network Operations Research Articles

Development life cycle of computer networks: the executable model approach

An approach is proposed for extending the use of design models to the implementation and operational phases of the network development life cycle. A conceptual approach is offered for using executable models in the day-to-day operation of computer networks. Several strategies are given for integrating models into different development tasks. It is shown why these strategies are feasible. Characteristics of executable models that differ from those of traditional models are identified along with new technologies that reduce the cost of implementing and using executable models. >

Computer network operation: applicability of the vigilance paradigm to key tasks.

This paper examines the applicability of the vigilance paradigm to the task of monitoring data communication networks. Survey work and the results of usability evaluations of IBM network management products suggest that several key aspects of the vigilance paradigm do apply to this task. The task is prolonged but not necessarily continuous because of time sharing and social interaction. The signals are of the cognitive type and are many and varied. The simple ones are obvious; more difficult ones are not. The signals are infrequent and aperiodic. The frequency is probably lower than in most vigilance experiments, and the response does have an impact on future signal rate. Often the response to a detected problem is to begin problem recording and troubleshooting. A set of recommendations for modification of the paradigm and experimental parameter values is provided that will make the results of future vigilance experiments more applicable to this type of operational monitoring. A second set of recommendations is provided for improving human performance in this type of system monitoring.

Lightning Direction Finding Systems and their Developments

The detection and location of lightning by magnetic direction finding system (MDFS) and lightning position and tracking system (LPATS) are major meteorological techniques in recent years. The two systems have been critically discussed and the irrelative advantages and deficiencies are focused.Lightning is a major meteorological hazard. In addition to the protection of general public, access to real time lightning ground strike data could play a vital role in forest Are measurement, computer and communication network operation, explosives and toxic material handling, aircraft refueling and maintenance and repair of utility transmission and distribution systems. Even the nuclear plant operations may be considerably impacted by lightning [1]. Ruat et al [2] have shown the value of lightning data as a component of severe thunderstorm research. The needs for accurate location of lightning ground strikes are hence well documented.This note summarize the efforts to evaluate a new lightning location technology wi...

The microcomputer revolution in operations research

This study argues that our society is in the midst of a remarkable revolution triggered by biological and microprocessor-related research and development. It then focuses on the impact this revolution is having on the field of operations research as microprocessor performance improves and microprocessor price and size decrease. Examples such as the design and operation of cable TV systems, computer networks and intelligent buildings illustrate this impact and point towards a host of new and extremely challenging optimization problems for operations researchers to study.

An application of network management at a large computing service

Productive operation of a large computer network serving multiple user facilities in conjunction with several host sites requires the use of network management. As treated here, network management includes an array of such methods as communication systems management, problem management, change management, and inventory management. In this paper the use of some of the management techniques is described as they apply in an education support facility network. The setup of the facility is first described; then some of the techniques for managing its operation are presented.

Preface

The increasing trend toward distributed data processing, with its networks of computers, has brought the interests of the communications and computing industries into close alignment. Issues such as communication protocols, computer network operation and management, and future technology are receiving increasing attention. In this issue of the Systems Journal, we take a closer look at this rapidly changing environment.

Regulation of computer communications

The Federal Communications Commission has developed policies for the resale and shared use of common carrier services. This decision will affect the operation of common user computer networks. The policies established by this decision are summarized in this paper. Resale operations will be regulated as common carriage. Sharing arrangements will remain unregulated. Sharing must be conducted on a non-profit basis. Resale is restricted to private line services. The FCC has established a policy of open entry for resale carriers without regard to impact on existing carriers. The existing restraints which restrict the provision of data processing by common carriers are applicable to resale carriers but request for waivers will be entertained.