An Integrated System Using Open source Nethserver OS; A Case Study of Kessben University College Local Area Network

An integrated system refers to a collection of software’s on a computer system that provides services to users on a network like a Local area network. These services are used by an organization in their day to day operations. The services include Email, Web service, File sharing, DHCP, DNS, Secure shell, and several others. This research seeks to implement a suite of these applications on a single computer architecture using Kessben University College local area network as a case study. Small and large organizations can benefit from such integrated systems because of reduced operating costs and the provision of an increase in business agility. This paper also proposes and explores additional services like remote network control software using open source Guacamole which is based on HTML5 technology. The advantages of integrated systems go beyond cost. Systems and network administrators will have a single point of system to control and monitor other systems for quality of service. This design ensures an improved network access to the services by implementing strong firewall designed to control inbound and outbound

Data storage and retrieval system

The Data Storage and Retrieval System (DSRS) consists of off-the-shelf system components integrated as a file server supporting very large files. These files are on the order of one gigabyte of data per file, although smaller files on the order of one megabyte can be accommodated as well. For instance, one gigabyte of data occupies approximately six 9 track tape reels (recorded at 6250 bpi). Due to this large volume of media, it was desirable to shrink the size of the proposed media to a single portable cassette. In addition to large size, a key requirement was that the data needs to be transferred to a (VME based) workstation at very high data rates. One gigabyte (GB) of data needed to be transferred from an archiveable media on a file server to a workstation in less than 5 minutes. Equivalent size, on-line data needed to be transferred in less than 3 minutes. These requirements imply effective transfer rates on the order of four to eight megabytes per second (4-8 MB/s). The DSRS also needed to be able to send and receive data from a variety of other sources accessible from an Ethernet local area network

APHL all-hazards laboratory preparedness report

In accordance with Presidential Decision Directive 39, the CDC, the FBI and APHL formed the LRN in 1999. This network is the nation's premier system for identifying, testing and characterizing potential agents of biological and chemical terrorism. The LRN's vast, integrated network of state and local public health, federal, military and international laboratories enables it to respond quickly to all-hazards threats. State and local public health laboratories comprise approximately 70% of the 160 LRN Biological Reference Laboratories and almost 100% of the LRN Chemical Laboratories. These laboratories produce high-confidence test results that are the basis for threat analysis and intervention by both public health and law enforcement authorities."May 2013."Mode of access: World Wide Web as an Acrobat .pdf file (4.66 MB, 24 p.).System requirements: Adobe Acrobat Reader.Includes bibliographical references (p. 23).Text in PDF format.This report was supported by Cooperative Agreement #U60HM000803 from CDC

Design and Implementation of a State-of-the-art Inventory and Forecasting System for Indigenous Forests

Inventory for forest management cannot be divorced from area estimation and yield forecasting. An integrated area-inventory-forecasting system is essential for efficient and effective forest management. Such a system implemented by the Queensland Department of Forestry has proved versatile and useful. The forest estate is divided into management units for administrative and management convenience. Each management unit is further stratified into homogenous subunits, for which both gross and nett areas are determined. The area information sub-system is implemented on desk-top computers in regional offices, and local staff familiar with the area provide and update the area data. Inventory ensures at least two plots per subunit enabling computation of sampling errors. Additional plots are established in subunits with high sampling errors to minimize overall sampling errors. Inventory data is stored on a central computer network in an hierarchical file structure with one plot per file. This approach is efficient and flexible, and facilitates the retrieval of selected data. Software for validating, editing and reporting simplifies management of the data. Yield forecasting employs heuristic simulation to predict the logging schedule, grows each individual plot to the scheduled year of logging, and estimates yields and standard errors for each management unit. The information so provided enables both strategic and tactical planning. Users may specify minimum and marginal stem sizes and yields per hectare, as well as economic and operational criteria which influence the simulation of the logging schedule and the predicted yields. An interactive user interface enables users to investigate silvicultural alternatives for individual forest stands. The system has been favourably received by users. Printed and on-line documentation and on-line help assist both new and experienced users

Quality of Service over Specific Link Layers: state of the art report

The Integrated Services concept is proposed as an enhancement to the current Internet architecture, to provide a better Quality of Service (QoS) than that provided by the traditional Best-Effort service. The features of the Integrated Services are explained in this report. To support Integrated Services, certain requirements are posed on the underlying link layer. These requirements are studied by the Integrated Services over Specific Link Layers (ISSLL) IETF working group. The status of this ongoing research is reported in this document. To be more specific, the solutions to provide Integrated Services over ATM, IEEE 802 LAN technologies and low-bitrate links are evaluated in detail. The ISSLL working group has not yet studied the requirements, that are posed on the underlying link layer, when this link layer is wireless. Therefore, this state of the art report is extended with an identification of the requirements that are posed on the underlying wireless link, to provide differentiated Quality of Service

Bandwidth characteristics of multimedia data traffic on a local area network

Limited spacecraft communication links call for users to investigate the potential use of video compression and multimedia technologies to optimize bandwidth allocations. The objective was to determine the transmission characteristics of multimedia data - motion video, text or bitmap graphics, and files transmitted independently and simultaneously over an ethernet local area network. Commercial desktop video teleconferencing hardware and software and Intel's proprietary Digital Video Interactive (DVI) video compression algorithm were used, and typical task scenarios were selected. The transmission time, packet size, number of packets, and network utilization of the data were recorded. Each data type - compressed motion video, text and/or bitmapped graphics, and a compressed image file - was first transmitted independently and its characteristics recorded. The results showed that an average bandwidth of 7.4 kilobits per second (kbps) was used to transmit graphics; an average bandwidth of 86.8 kbps was used to transmit an 18.9-kilobyte (kB) image file; a bandwidth of 728.9 kbps was used to transmit compressed motion video at 15 frames per second (fps); and a bandwidth of 75.9 kbps was used to transmit compressed motion video at 1.5 fps. Average packet sizes were 933 bytes for graphics, 498.5 bytes for the image file, 345.8 bytes for motion video at 15 fps, and 341.9 bytes for motion video at 1.5 fps. Simultaneous transmission of multimedia data types was also characterized. The multimedia packets used transmission bandwidths of 341.4 kbps and 105.8kbps. Bandwidth utilization varied according to the frame rate (frames per second) setting for the transmission of motion video. Packet size did not vary significantly between the data types. When these characteristics are applied to Space Station Freedom (SSF), the packet sizes fall within the maximum specified by the Consultative Committee for Space Data Systems (CCSDS). The uplink of imagery to SSF may be performed at minimal frame rates and/or within seconds of delay, depending on the user's allocated bandwidth. Further research to identify the acceptable delay interval and its impact on human performance is required. Additional studies in network performance using various video compression algorithms and integrated multimedia techniques are needed to determine the optimal design approach for utilizing SSF's data communications system

Global Grids and Software Toolkits: A Study of Four Grid Middleware Technologies

Grid is an infrastructure that involves the integrated and collaborative use of computers, networks, databases and scientific instruments owned and managed by multiple organizations. Grid applications often involve large amounts of data and/or computing resources that require secure resource sharing across organizational boundaries. This makes Grid application management and deployment a complex undertaking. Grid middlewares provide users with seamless computing ability and uniform access to resources in the heterogeneous Grid environment. Several software toolkits and systems have been developed, most of which are results of academic research projects, all over the world. This chapter will focus on four of these middlewares--UNICORE, Globus, Legion and Gridbus. It also presents our implementation of a resource broker for UNICORE as this functionality was not supported in it. A comparison of these systems on the basis of the architecture, implementation model and several other features is included.Comment: 19 pages, 10 figure