Research Projects

Knowledge-based Virtual Collaboration Environments

Zusammen mit den Lehrgebieten

• Bürgerliches Recht, Unternehmensrecht und Rechtsvergleichung,
• Informationssysteme und Datenbanken,
• Kooperative Systeme,
• Multimedia und Internetanwendungen,
• Rechnerarchitektur und
• Wissensbasierte Systeme

werden Designprinzipien, Designmethoden und IT-Unterstützung zur Entwicklung von wissensbasierten virtuellen Kollaborationsumgebungen für industrielle Designprozesse und e-Science basierte Forschung untersucht. Der eigene Beitrag befasst sich dabei mit virtuellen Laboren und Sicherheitsaspekten.

links4science Reconnaissance

Together with actors of the initiative, links4science will create, reflect, refine, update, and continue concepts for the implementation of a coordination, networking, integration, and indentation strategy. The reconnaissance enterprise accomodates the urgent needs for networking, coordination and integration in a straight way. In the reconnaissance, links4science immediately starts operations and tackles the issues of the main project. The goal is to have first working results meanwhile the far more substantial main project gets prepared.

Consortium

Participating Chairs of the University in Hagen

• Multimedia and Internet Applications, Prof. Dr.-Ing. Matthias L. Hemmje
• Cooperative Systems, Prof. Dr.-Ing. Jörg Haake
• Computer Architecture, Prof. Dr. Wolfram Schiffmann
• Parallelism and Very Large Scale Integration, Prof. Dr. Jörg Keller

Subcontractors

• Niedersächsische Staats- und Universitätsbibliothek Göttingen
• Konrad-Zuse-Zentrum für Informationstechnik, Berlin
• GLOBIT - Globale Informationstechnik GmbH, Darmstadt

Nestor II

The project's objective is to create a network of expertise in long-term storage of digital resources for Germany. As the perspective of current and future archive users is central to the project, the emphasis is put on long-term accessibility. Within the project the following offers will be created: a web-based information forum, a platform for information and communication, criteria for trusted digital repositories, recommendations for certification procedures of digital repositories, recommendations for collecting guidelines and selection criteria of digital resources to be archived, guidelines and policies, the concept for a permanent organisation form of the network of expertise in digital preservation. The long-term goal is a permanent distributed infrastructure for long-term preservation and long-term accessability of digital resources in Germany comparable e.g. to the Digital Preservation Coalition in the UK.

Consortium

Projekt Partners

• Die Deutsche Bibliothek
• Niedersächsische Staats- und Universitätsbibliothek Göttingen
• Computer- und Medienservice und Universitätsbibliothek der Humboldt-Universität Berlin
• Bayerische Staatsbibliothek
• Institut für Museumskunde der Staatlichen Museen zu Berlin / Stiftung Preußischer Kulturbesitz
• Bundesarchiv
• FernUniversität in Hagen, Fachbereich Informatik, Lehrgebiet Multimedia und Internetanwendungen

Associated Partners

• Geoforschungszentrum Potsdam
• Universität der Bundewehr München, Institut für Softwaretechnologie
• Otto-von-Guericke-Universität Magdeburg, Fakultät für Informatik
• FernUniversität in Hagen, Fachbereich Informatik, Lehrgebiet Rechnerarchitektur

Immersive Imaging

Team: Alexander Block; Udo Hönig; Helge Scheunemann; Prof. Schiffmann

Immersive imaging is a new kind of visualization which should mediate the illusion to be within the displayed scene. We work towards this goal by means of a wide angle display system that provides a curved canvas area with a diameter of approximately meters and that covers an angle of 270 degree. By means of 6 LCD-projectors a total of 4.7 million pixels can be displayed. The display hardware is already realized. The remaining research consists of the development of parallel algorithms for seamless distribution of a panoramic image over the projectors. The projectors will be controlled by six nodes that are part of our cluster computer.

Status: Running

Scheduling Algorithms

Team: Udo Hönig; Prof. Schiffmann

In order to use the power of a parallel computer one has to divide a task into several subtasks, that can run on different computing nodes. The total time of a parallel computation depends on both the assignment of the subtaks to the computing nodes and the order in which these subtasks will be launched. The relations between the subtaks are given by a directed acyclic precedence graph (task graph). The scheduling problem is NP complete and thus, for a big number of task it can only be solved by heuristic approaches. Fortunately, if the number of tasks is "small" we can determine the optimal scheduling by an (optimized) exhaustive search where all symmetric permutations in the schedule are eliminated. These optimal schedules should be used later on for the evaluation of heuristic schedules.

Status: Running

Development of a cluster computing system

Team: Alexander Block; Udo Hönig; Helge Scheunemann; Prof. Schiffmann

The cluster computer LEIBNIZ uses commodity PC-boards with AMD Athlon processors (32 nodes with 850 MHz clock rate, 8 nodes with 1600 MHz clock rate). The nodes have separate hard disks for storing the LINUX operating system and user data. There are neither displays nor keyboards. Thus, the computing power can solely be used via the network interface that operates at 100 Mbit per second of a fast ethernet link. A switching hub allows simultaneous communication between multiple nodes and connects the cluster with the internet. In order to accelerate the computation of a problem we have to find a solution that can be divided into a set of tasks which run on different nodes. Usually these nodes must exchange intermdiate results with other nodes by communication over the fast ethernet interface. At the best, we can get the solution 40 times faster than by using of a single computer.

Status: Finished

Remote lab for logic design

Team: Dr. Helmut Bähring; Peter Buschhorn, Andreas Kleimann; Prof. Schiffmann

Labs and assignments are essential ingredients of distance learning education because they can extend the written course materials and help to deepen the understanding. In the research project a remote computer engineering lab will be developed that can be accessed via the internet. Instead of using slow simulations, the students can conduct experiments with real hardware that can be controlled by means of any webbrowser.

Status: Finished

Development of internet-based Assignments in Basic Courses of Computer Engineering

Team: Carsten Dechardt; Udo Hönig; Prof. Jörg Keller; Prof. Wolfram Schiffmann; Prof. Hans-Werner Six

In the foundations of computer engineering, constructive elements like development of digital circuits play an important role for the acquisition and control of the understanding of the course matter. Paper drawings allow only for a restricted feedback, correction of assignments is time-consuming. Therefore, a web-based assignment system for computer engineering will be realized on the basis of the already established WebAssign system. Key is the selection and integration of a cad tool into the WebAssign system, to allow students to interactively input and test their solutions much more intensive than before. The correction will be partially automated by sets of test inputs.

Status: Finished

DCMA-DSP: Dynamical Configurable Multiprocessor Architecture on DSP Basis

Team: Dr. Helmut Bähring; Peter Buschhorn

Digital signal processors are found increasingly in critical embedded control applications. The project aims towards a prototype as a feasibility study and evaluation of a system which in-corporates the ability to tolerate transient and pseudopermant faults. Additionally the system can configure its degree of fault tolerance to meet the actually required performance needs. Derived from the experiences of real systems in harsh environments special efforts are made on the vulnerability of the TMR-Mode.

Status: Finished