Browsing by Subject "Distributed computer systems"

Now showing items 1-20 of 91

    • Conference Object  

      Analysing cancer genomics in the elastic cloud 

      Smowton, C.; Miller, C.; Xing, Wei; Balla, A.; Antoniades, Demetris; Pallis, George C.; Dikaiakos, Marios D. (Institute of Electrical and Electronics Engineers Inc., 2015)
      With the rapidly growing demand for DNA analysis, the need for storing and processing large-scale genome data has presented significant challenges. This paper describes how the Genome Analysis Toolkit (GATK) can be deployed ...
    • Conference Object  

      Applying trust mechanisms in an agent-based P2P network of service providers and requestors 

      Tamani, E.; Evripidou, Paraskevas (2006)
      Building an agent-based network of service providers and requestors requires the effective management of the interactions among peers. These interactions, as in real life, require the mutual trust of the peers participating ...
    • Article  

      Asynchronous timed multimedia environments based on the coordination paradigm 

      Papadopoulos, George Angelos (2003)
      This paper combines work done in the areas of Artificial Intelligence, Multimedia Systems and Coordination Programming to derive a framework for Distributed Multimedia Systems based on asynchronous timed computations ...
    • Conference Object  

      Brief Announcement: Optimally work-competitive scheduling for cooperative computing with merging groups 

      Georgiou, Chryssis; Russell, A.; Shvartsman, A. A. (2002)
      The development of algorithms with guaranteed work efficiency for any pattern of fragmentations and merges of the underlying network is addressed. Current results are discussed for the abstract setting where asynchronous ...
    • Article  

      Cloud computing: The new frontier of internet computing 

      Pallis, George C. (2010)
      Cloud computing is a new field in Internet computing that provides novel perspectives in internetworking technologies and raises issues in the architecture, design, and implementation of existing networks and data centers. ...
    • Conference Object  

      Communities: Concept-based querying for mobile services 

      Skouteli, C.; Panayiotou, Christoforos; Samaras, George S.; Pitoura, Evaggelia 1967- (2005)
      In this paper, we consider semantic service discovery in a global computing environment. We propose creating a dynamic overlay network by grouping together semantically related services. Each such group is termed a community. ...
    • Article  

      A comparative study of protocols for efficient data propagation in smart dust networks 

      Chatzigiannakis, Ioannis; Dimitriou, Tassos D.; Mavronicolas, Marios; Nikoletseas, Sotiris E.; Spirakis, Paul G. (2003)
      Smart Dust is comprised of a vast number of ultra-small fully autonomous computing and communication devices, with very restricted energy and computing capabilities, that co-operate to accomplish a large sensing task. Smart ...
    • Article  

      Competitive analysis of task scheduling algorithms on a fault-prone machine and the impact of resource augmentation 

      Fernández Anta, Antonio; Georgiou, Chryssis; Kowalski, D. R.; Zavou, Elli (2015)
      Reliable task execution on machines that are prone to unpredictable crashes and restarts is both important and challenging, but not much work exists on the analysis of such systems. We consider the online version of the ...
    • Article  

      The complexity of synchronous iterative do-all with crashes 

      Georgiou, Chryssis; Russell, A.; Shvartsman, A. A. (2001)
      Do-All is the problem of performing N tasks in a distributed system of P failure-prone processors [8]. Many distributed and parallel algorithms have been developed for this problem and several algorithm simulations have ...
    • Article  

      Component-based development of dynamic workflow systems using the coordination paradigm 

      Papadopoulos, George Angelos; Fakas, Georgios John (2003)
      We argue for the need to use control-based, event-driven and state-defined coordination models and associated languages in modelling and automating business processes (workflows). We propose a two-level architecture of a ...
    • Article  

      Computational assessment of distributed decomposition methods for stochastic linear programs 

      Vladimirou, Hercules (1998)
      Incorporating uncertainty in optimization models gives rise to large, structured mathematical programs. Decomposition procedures are well-suited for parallelization, thus providing a promising venue for solving large ...
    • Article  

      Computing on a partially eponymous ring 

      Mavronicolas, Marios; Michael, Loizos; Spirakis, Paul G. (2009)
      We study the partially eponymous model of distributed computation, which simultaneously generalizes the anonymous and the eponymous models. In this model, processors have identities, which are neither necessarily all ...
    • Article  

      Computing on a partially eponymous ring 

      Mavronicolas, Marios; Michael, Loizos; Spirakis, Paul G. (2006)
      We study the partially eponymous model of distributed computation, which simultaneously generalizes the anonymous and the eponymous models. In this model, processors have identities, which are neither necessarily all ...
    • Conference Object  

      Confidential gossip 

      Georgiou, Chryssis; Gilbert, S.; Kowalski, D. R. (2011)
      Epidemic gossip has proven a reliable and efficient technique for sharing information in a distributed network. Much of the reliability and efficiency derives from processes collaborating, sharing the work of distributing ...
    • Conference Object  

      Context management and its applications to distributed transactions 

      Samaras, George S.; Kshemkalyani, Ajay D.; Citron, Andrew (IEEE, 1996)
      An emerging paradigm that handles multiple locii of control in a system allows multiple program threads to work on the same task, each thread to work on a different task, or a thread to work on multiple tasks for greater ...
    • Article  

      A control theoretical approach to self-optimizing block transfer in Web service grids 

      Gounaris, A.; Yfoulis, C.; Sakellariou, R.; Dikaiakos, Marios D. (2008)
      Nowadays, Web Services (WS) play an important role in the dissemination and distributed processing of large amounts of data that become available on the Web. In many cases, it is essential to retrieve and process such data ...
    • Conference Object  

      Control-driven coordination based assembling of components 

      Chimaris, Avraam N.; Papadopoulos, George Angelos (2002)
      The coordination paradigm has been used extensively as a mechanism for software composition and integration. Consequently, a number of associated models and languages have been proposed which address issues of CBSE from ...
    • Conference Object  

      Coordination of systems with real-time properties in manifold 

      Papadopoulos, George Angelos; Arbab, Farhad (IEEE, 1996)
      This paper combines work done in the areas of asynchronous timed computations and coordination models in order to derive a framework able to express real-time coordination without adhering to special architectures or ...
    • Conference Object  

      A core grid ontology for the semantic grid 

      Wei, X.; Dikaiakos, Marios D.; Sakellariou, R. (2006)
      In this paper, we propose a Core Grid Ontology (CGO) that define s fundamental Grid-specific concepts, and the relationships between them. One of the key goals is to make this Core Grid Ontology general enough and easily ...
    • Article  

      The cost of concurrent, low-contention Read&Modify&Write 

      Busch, Costas; Mavronicolas, Marios; Spirakis, Paul G. (2005)
      The possibility or impossibility and the corresponding costs of devising concurrent, low-contention implementations of atomic Read&Modify&Write (or RMW) operations in a distributed system were addressed. A natural class ...