Now showing items 1-20 of 94

  • Cooperation through information interchange in StormCast 

    Hartvigsen, Gunnar; Johansen, Dag (Research report; Forskningsrapport, 1990)
    This paper addresses the cooperation between different expert system modules in a networking environment. StormCast - a distributed artificial intelligence application for severe storm forecasting is used as a case to ...
  • A multiagent architecture for a distributed artificial intelligence application 

    Hartvigsen, Gunnar; Johansen, Dag (Research report; Forskningsrapport, 1990)
    Artificial intelligence applications are normally complex, demanding much computing power. This paper presents the multiagent architecture of StormCast, a distributed artificial intelligence application for severe storm ...
  • StormVideo - digital video in the field of meteorology 

    Nybø, Olav; Hartvigsen, Gunnar; Johansen, Dag (Research report; Forskningsrapport, 1994-09)
    Visual observations constitute important input to different meteorological tasks. Previously, these observations were made by human observers and manually reported to the meteorologists. With the employment of video ...
  • 3D visualization of weather forecasts and topography 

    Skotnes, Harald; Hartvigsen, Gunnar; Johansen, Dag (Research report; Forskningsrapport, 1994-09)
    Advances in computing power and graphics have increased the use of graphics in weather forecasting. This includes 3D animation sequences and geographical information systems. The paper addresses the main problems and ...
  • Increased scalability of the StormCast distributed application 

    Farsi, V. (Research report; Forskningsrapport, 1994-09)
    Scaling is recognized as a primary concern in developing distributed applications. Scaling problems occur when an application reach its upper boundary in some way or another. This paper describes the considerations made ...
  • Satellite communication applied in a distributed application 

    Farstad, Werner; Johansen, Dag; Hartvigsen, Gunnar (Research report; Forskningsrapport, 1994-12)
    The paper describes the development of a prototype application for access to vital weather information from the Northern Atlantic sea region. The application gives meteorologists access to weather observations measured on ...
  • The StormCast API. Specification of software interfaces in StormCast 2.1 

    Hartvigsen, Gunnar; Johansen, Dag; Farsi, Vahid; Farstad, Werner; Høgtun, Bente; Knudsen, Pål (Research report; Forskningsrapport, 1994-12)
    This report presents the software architecture in the StormCast meteorological workbench. The focus is on the software interfaces in StormCast version 2.1. For each layer in the architecture the functionality, the call ...
  • File repository transfer protocol. Version 1 

    Stabell-Kulø, Tage (Research report; Forskningsrapport, 1995-02)
    This document presents and specifies the protocol that interfaces clients and servers in the File Repository (FR). The FR is a software system that supports sharing of files. The protocol is modelled after Smtp and Nntp ...
  • Secure communication in FRTP 

    Stabell-Kulø, Tage (Research report; Forskningsrapport, 1995-02)
    To ensure privacy, users of the File Repository Transfer Protocol (Frtp) may require that communication partners are properly authenticated. If one partner wants the communication to be crypted, the other must honor the ...
  • Performance experiments with the Storm View Distributed Parallel Volume Renderer. 

    Asplin, Jo; Johansen, Dag (Research report; Forskningsrapport, 1995-06)
    Volume rendering is a useful but cpu-intensive method for visualizing large scalar fields. The time to render a single image may be reduced by parallel processing. This paper reports on performance experiments with the ...
  • An introduction to the TACOMA distributed system. Version 1.0 

    Renesse, Robbert van; Johansen, Dag; Schneider, Fred B. (Research report; Forskningsrapport, 1995-06)
    This report briefly introduces TACOMA Version 1.0. This distributed system supports agents, computations that can roam the internet. The report presents the TACOMA project, the computational model, how to get started, and ...
  • On the design of a generic object adaptor 

    Eliassen, Frank; Hanssen, Øyvind (Conference object; Konferansebidrag, 1995-08)
  • Efficient bill-of-materials algorithms 

    Khalaila, Ahmad; Beeri, Catriel; Eliassen, Frank (Research report; Forskningsrapport, 1996-09-01)
    It has been shown that every linearly recursive database query can be expressed as a transitive closure possibly preceded and followed by relational algebraic operations. A large class of such queries computes the ...
  • Mobile software on mobile hardware. Experiences with TACOMA on PDAs. 

    Jacobsen, Kjetil; Johansen, Dag (Research report; Forskningsrapport, 1997)
    In this paper, we present experiences from adding software mobility to mobile, hand-held computers. In particular, we have built TACOMA Lite, a mobile code system, for this environment. With TACOMA Lite installed, hand-held ...
  • On the design and performance of the PARFUM Parallel Fault Tolerant Volume Renderer 

    Asplin, Jo; Mehus, Sindre (Research report; Forskningsrapport, 1997-01)
    Volume rendering is an important and CPU-intensive technique for visualizing large scalar fields. In essence, a volume renderer performs two activites on behalf of the user: loading a new data set, and rendering the current ...
  • Security in the PASTA project 

    Stabell-Kulø, Tage (Research report; Forskningsrapport, 1997-02-04)
    This paper presents the system model for the work on security in the Pasta project. We present the objectives of the security effort, the threats we will consider, and those we will not consider. As such, the paper describes ...
  • An efficient bill-of-materials algorithm 

    Khalaila, Ahmad; Eliassen, Frank (Research report; Forskningsrapport, 1997-04)
    A large class of linear recursive queries compute the bill-of-materials of database relations.This paper presents a novel algorithm that computes the bill-of-materials of its argument's (database) relation. The algorithm ...
  • Quick- instead of Merge-sort for pipelines systems 

    Khalaila, Ahmad H.; Eliassen, Frank (Research report; Forskningsrapport, 1997-05)
    This paper proposes an external sorting algorithm for large data as an alternative to the widely used merge-sort algorithm. The algorithm we present is an application of the widely known quick-sort algorithm to large ...
  • QoS applied to security in mobile computing 

    Fallmyr, Terje; Stabell-Kulø, Tage (Research report; Forskningsrapport, 1997-06-30)
    Hand-held mobile computers have the potential to become important communication tools for roaming users. As such, they will also become very personal. They will be used under a wide range of operating conditions, and tight ...
  • An approach towards an agent computing environment 

    Johansen, Dag; Marzullo, Keith; Lauvset, Kåre J. (Research report; Forskningsrapport, 1998)
    We devise a mobile agent middleware architecture for supporting distributed applications in a wide-area network. The architecture provides a structural framework for functional components that are needed to support mobile ...