• Conference Object  

      Anyplace: A Crowdsourced Indoor Information Service 

      Georgiou, K.; Constambeys, T.; Laoudias, Christos; Petrou, L.; Chatzimilioudis, Georgios; Zeinalipour-Yazdi, Constantinos D. (Institute of Electrical and Electronics Engineers Inc., 2015)
      People do most of their activities, business, commerce, entertainment and socializing indoors. As all of these are increasingly aided by online services and indoor spaces are becoming bigger and more complex, there is a ...
    • Article  

      A comparison study of heuristics for mapping parallel algorithms to message-passing multiprocessors 

      Dikaiakos, Marios D.; Rogers, A.; Steiglitz, K. (1995)
      This paper presents a comparison study of popular clustering and mapping heuristics which are used to map task-flow graphs to message-passing multiprocessors. To this end, we use task-graphs which arc representative of ...
    • Article  

      Exploring the potential of user modeling based on mind maps 

      Beel, J.; Langer, S.; Kapitsaki, Georgia M.; Breitinger, C.; Gipp, B. (2015)
      Mind maps have not received much attention in the user modeling and recommender system community, although mind maps contain rich information that could be valuable for user-modeling and recommender systems. In this paper, ...
    • Article  

      Feature mapping through maximization of the atomic interclass distances 

      Karatsiolis, Savvas; Schizas, Christos N. (2015)
      We discuss a way of implementing feature mapping for classification problems by expressing the given data through a set of functions comprising of a mixture of convex functions. In this way, a certain pattern’s potential ...
    • Article  

      High thermoelectric figure of merit of Mg2Si 0.55Sn0.4Ge0.05 materials doped with Bi and Sb 

      Khan, A. U.; Vlachos, N.; Kyratsi, Theodora (2013)
      Thermoelectric properties of new Bi- and Sb-doped Mg2Si 0.55Sn0.4Ge0.05 compounds prepared by powder methods were studied in the temperature range 300-823 K. The materials exhibited compositional inhomogeneites consisting ...
    • Conference Object  

      Identification and control of aircraft dynamics using radial basis function networks 

      Ahmed-Zaid, F.; Ioannou, Petros A.; Polycarpou, Marios M.; Youssef, H. M. (Publ by IEEE, 1993)
      In this paper, we investigate one type of neural networks, namely the Radial Basis Functions (RBF) networks, and apply them to the identification and control problems of an aircraft system. The RBF network is used as an ...
    • Conference Object  

      Interactive local tone mapping operator with the support of graphics hardware 

      Roch, B.; Artusi, A.; Michael, D.; Chrysanthou, Yiorgos L.; Chalmers, A. (Association for Computing Machinery, Inc, 2007)
      The flexibility of current graphics hardware is still not enough to ensure the full implementation of an original complex algorithm such as a local tone mapping operator, which maintains the same quality performances as ...
    • Article  

      Isolating stock prices variation with neural networks 

      Draganova, C.; Lanitis, A.; Christodoulou, Chris C. (2009)
      In this study we aim to define a mapping function that relates the general index value among a set of shares to the prices of individual shares. In more general terms this is problem of defining the relationship between ...
    • Article  

      Linearisation and potential symmetries of certain systems of diffusion equations 

      Sophocleous, Christodoulos; Wiltshire, R. J. (2006)
      We consider systems of two pure one-dimensional diffusion equations that have considerable interest in Soil Science and Mathematical Biology. We construct non-local symmetries for these systems. These are determined by ...
    • Conference Object  

      Mapping of data obtained on driving simulator to reality based on simulator validation results (WIP) 

      Butakov, V.; Ioannou, Petros A. (The Society for Modeling and Simulation International, 2014)
      The use of a driving simulator can be preferable to on-road experiments for cost-efficient rapid prototype testing or dangerous driving scenario evaluations. However, the mismatch of the simulator and the actual driving ...
    • Article  

      Neural network methods for one-to-many multi-valued mapping problems 

      Jayne, C.; Lanitis, A.; Christodoulou, Chris C. (2011)
      An investigation of the applicability of neural network-based methods in predicting the values of multiple parameters, given the value of a single parameter within a particular problem domain is presented. In this context, ...
    • Article  

      Nonconcurrent error detection and correction in fault-tolerant discrete-time LTI dynamic systems 

      Hadjicostis, Christoforos N. (2003)
      This paper develops resource-efficient alternatives to modular redundancy for fault-tolerant discrete-time (DT) linear time-invariant (LTI) dynamic systems. The proposed method extends previous approaches that are based ...
    • Article  

      On the group classification of variable-coefficient nonlinear diffusion-convection equations 

      Ivanova, Nataliya M.; Sophocleous, Christodoulos (2006)
      We consider the variable coefficient diffusion-convection equation of the form f (x) ut = [g (x) D (u) ux]x + h (x) K (u) ux which has considerable interest in mathematical physics, biology and chemistry. We present a ...
    • Conference Object  

      A selective approach for tone mapping High Dynamic Range content 

      Artusi, A.; Michael, D.; Roch, B.; Chrysanthou, Yiorgos L.; Chalmers, A. (2011)
      Large resolution High Dynamic Range (HDR) textures/images are becoming common in computer graphics applications. However, it is still a prohibitive task to perform on them a filtering step such as tone mapping in real-time. ...
    • Conference Object  

      Selective local tone mapping 

      Artusi, A.; Akyüz, A. O.; Roch, B.; Michael, D.; Chrysanthou, Yiorgos L.; Chalmers, A. (2013)
      When preparing high dynamic range images (HDR) for display on standard monitors, it is often necessary to make a choice between global and local tone mapping. While the former is simple and efficient, it may fail to reproduce ...