• Article  

      Directed Information on Abstract Spaces: Properties and Variational Equalities 

      Charalambous, Charalambos D.; Stavrou, P. (2016)
      Directed information or its variants are utilized extensively in the characterization of the capacity of channels with memory and feedback, nonanticipative lossy data compression, and their generalizations to networks. In ...
    • Conference Object  

      Efficient exploration of telco big data with compression and decaying 

      Costa, Constantinos; Chatzimilioudis, Georgios; Zeinalipour-Yazdi, Constantinos D.; Mokbel, M. F. (IEEE Computer Society, 2017)
      In the realm of smart cities, telecommunication companies (telcos) are expected to play a protagonistic role as these can capture a variety of natural phenomena on an ongoing basis, e.g., traffic in a city, mobility patterns ...
    • Article  

      Implementing the MPEG-21 adaptation quality of service in dynamic environments 

      Angelides, Marios C.; Sofokleous, Anastasis A.; Schizas, Christos N. (2006)
      MPEG-21 embeds the AQoS schema tool which describes and associates conceptually major utilities required during the adaptation process, for example, adaptation operators, constraints and qualities. Defining an AQoS model, ...
    • Article  

      Medical imaging fusion applications: An overview 

      Pattichis, Constantinos S.; Pattichis, Marios S.; Micheli-Tzanakou, Litsa Evangelia (2001)
      Computer aided fusion of multi modality medical images provides a very promising diagnostic tool with numerous clinical applications. The objective of this paper is to present an overview of medical imaging fusion techniques ...
    • Conference Object  

      Performance and power optimization through data compression in Network-on-Chip architectures 

      Das, R.; Mishra, A. K.; Nicopoulos, Chrysostomos A.; Park, D.; Narayanan, V.; Iyer, R.; Yousif, M. S.; Das, C. R. (2008)
    • Article  

      A process-calculus analysis of concurrent operations on B-trees 

      Philippou, Anna; Walker, D. (2001)
      A general theory of interactive systems with changing structure, the π-calculus, is used to study concurrent operations on a variant of the B-tree. An improved algorithm for compression of the data structure is given. Some ...
    • Conference Object  

      Rate distortion function with causal decoding 

      Charalambous, Charalambos D.; Kourtellaris, C. K.; Stavrou, P. A. (2010)
      This paper considers source coding of general sources with memory, when causal feedback is available at the decoder. The rate distortion function is defined as the infimum of the so-called directed information over causal ...