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  1. No Access

    Article

    Complexity of scheduling of coupled tasks with chains precedence constraints and any constant length of gap

    Coupled tasks scheduling was originally introduced for modelling complex radar devices. It is still used for controlling such devices and applied in similar applications. This paper considers a problem of coup...

    K Ecker, M Tanaś in Journal of the Operational Research Society (2012)

  2. No Access

    Article

    Scheduling of coupled tasks with unit processing times

    The coupled tasks scheduling problem was originally introduced for modeling complex radar devices. It is still used for controlling such devices and applied in similar applications. This paper considers a prob...

    J. Blazewicz, K. Ecker, T. Kis, C. N. Potts, M. Tanas in Journal of Scheduling (2010)

  3. Article

    Open Access

    Predictive map** of floristic site conditions across mire habitats: Evaluating data requirements

    As conservation of sensitive habitats is a high priority issue in European environmental policy, there is considerable interest in map** and monitoring specific habitats of high conservation value. In this s...

    K. Ecker, M. Küchler, E. Feldmeyer-Christe, U. Graf, L. T. Waser in Community Ecology (2008)

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    Article

    Approximation algorithm for periodic real-time tasks with workload-dependent running-time functions

    This paper addresses the problem of resource allocation for distributed real-time periodic tasks, operating in environments that undergo unpredictable changes and that defy the specification of meaningful wors...

    D. Juedes, F. Drews, D. Gu, L. Welch, K. Ecker, S. Schomann in Real-Time Systems (2006)

  5. Article

    Open Access

    Combining remotely sensed spectral data and digital surface models for fine-scale modelling of mire ecosystems

    The detection and evaluation of changes in vegetation patterns is a prerequisite for monitoring programs. The Swiss mire monitoring program aims to assess the changes in mire vegetation in order to examine the...

    M. Küchler, K. Ecker, E. Feldmeyer-Christe, U. Graf, H. Küchler in Community Ecology (2004)

  6. No Access

    Article

    The in vitro anti-inflammatory effects of recombinant anti-CD25 immunotoxin on lamina propria T cells of patients with inflammatory bowel disease are not sufficient to cure experimental colitis in mice

    Background and aims: In chronic inflammatory bowel disease (IBD) such as Crohn's disease and ulcerative colitis an aberrant mucosal immune regulation is observed accompanied by upregulation of pr...

    K. Pfister, B. Wittig, B. Jüngling, K. Ecker in International Journal of Colorectal Disease (2002)

  7. No Access

    Article

    Contribution of ICP-IDMS to the certification of antimony implanted in a silicon wafer – comparison with RBS and INAA results

    A thin-layer reference material for surface and near-surface analytical methods was produced and certified. The surface density of the implanted Sb layer was determined by Rutherford backscattering spectrometr...

    W. Pritzkow, J. Vogl, A. Berger, K. Ecker in Fresenius’ Journal of Analytical Chemistry (2001)

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    Article

    Multiprocessor task scheduling with resource requirements

    One of the most important problems arising in multiprocessor systems is scheduling of tasks on a set of parallel processors. Recently, new models of task processing have been formulated in which certain tasks ...

    J. Blazewicz, K. Ecker in Real-Time Systems (1994)

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    Chapter and Conference Paper

    Algorithmic Methods for Real-Time Scheduling

    Task scheduling is a wide research area whose results gained increasing interest during the last decades. A great variety of different algorithmic methods has been developed. Though these methods are very ofte...

    K. Ecker in Real Time Computing (1994)

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    Chapter and Conference Paper

    Elektromyographische Funktion des coloanalen Pouches

    Nach Rektumresektion im distalen Drittel ist die Stuhlfrequenz oft stark erhöht. Die Konstruktion des coioanalen J-Pouches führt im Vergleich zur direkten coioanalen Anastomose zur signifikanten Reduktion der ...

    U. Hildebrandt, T. Zuther, W. Lindemann in Chirurgisches Forum ’93 für experimentelle… (1993)

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    Chapter and Conference Paper

    Task scheduling with restricted preemptions

    One of the basic problems in time sharing systems and multiprocessing operating systems is to find an optimal schedule for a given set of tasks. In this paper we analyze the complexity of a restricted version ...

    K. Ecker, R. Hirschberg in PARLE '93 Parallel Architectures and Languages Europe (1993)

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    Chapter and Conference Paper

    CHARM II An Alternative Approach for Geometric Modeling

    An essential issue in engineering applications such as CAD or, more general, CIM is a powerful representation model that allows adequate modeling of objects those systems have to deal with. Well-known methods ...

    K. Ecker, J. Göers, R. Hirschberg in CAD ’92 (1992)

  13. No Access

    Chapter

    Multiprocessor Task Scheduling with Single Resource Constraints

    An important problem arising in a multiprocessor system context is that of task allocation (scheduling) among a set of processors working in parallel. One of the assumptions commonly imposed on the processor s...

    J. Blazewicz, M. Drabowski, K. Ecker in Parallel Processing Techniques for Simulat… (1986)

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    Chapter and Conference Paper

    Kritischer Vergleich von Algorithmen für ein Scheduling-Problem

    In this paper we are concerned with algorithms producing schedules for processes which consist of a finite set of tasks and a precedence relation between them. For executing tasks a system of m identical proce...

    K. Ecker in GI — 5. Jahrestagung (1975)

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    Article

    Eigenschaften der von linearen Automaten erkennbaren Worte

    The paper investigates the set of words accepted by a linear sequential machine M and the algebraic structure of this set. If M is nonsingular a strong relationship exists between this set and the transition grou...

    K. Ecker, H. Ratschek in Acta Informatica (1974)

  16. No Access

    Chapter and Conference Paper

    Das Transitionsmonoid bei der Parallelkompositipn von Endlichen Automaten

    Von grundlegender Bedeutung für die algebraische Automatentheorie ist die Realisierung von Automaten durch Kaskadenprodukte. KROHN und EHODES ([4]) haben in diesem Zusammenhang sich ausführlich mit Zerlegungse...

    K. Ecker in GI. Gesellschaft für Informatik e.V. 2. Jahrestagung (1973)