Browsing by Subject "Problem solving"

Now showing items 41-60 of 159

    • Conference Object  

      Discrete-time stochastic minimax control of partially observable systems 

      Charalambous, Charalambos D. (2001)
      This paper presents a sample path optimization technique, as an alternative to the ensample average in formulating and solving stochastic minimax dynamic games. The stochastic games are nonlinear, discrete-time, and partially ...
    • Conference Object  

      Distributed spatio-temporal similarity search 

      Zeinalipour-Yazdi, Constantinos D.; Lin, S.; Gunopulos, Dimitrios (2006)
      In this paper we introduce the distributed spatio-temporal similarity search problem: given a query trajectory Q, we want to find the trajectories that follow a motion similar to Q, when each of the target trajectories is ...
    • Article  

      The Do-All problem with Byzantine processor failures 

      Fernández, A.; Georgiou, Chryssis; Russell, A.; Shvartsman, A. A. (2005)
      Do-All is the abstract problem of using n processors to cooperatively perform m independent tasks in the presence of failures. This problem and its derivatives have been a centerpiece in the study of trade-offs between ...
    • Article  

      A dynamic stochastic programming model for international portfolio management 

      Topaloglou, Nikolas; Vladimirou, Hercules; Zenios, Stavros A. (2008)
      We develop a multi-stage stochastic programming model for international portfolio management in a dynamic setting. We model uncertainty in asset prices and exchange rates in terms of scenario trees that reflect the empirical ...
    • Article  

      A dynamic stochastic programming model for international portfolio management 

      Topaloglou, Nikolas; Vladimirou, Hercules; Zenios, Stavros A. (2008)
      We develop a multi-stage stochastic programming model for international portfolio management in a dynamic setting. We model uncertainty in asset prices and exchange rates in terms of scenario trees that reflect the empirical ...
    • Report  

      The Effects of Different Modes of Representation on Mathematical Problem Solving 

      Gagatsis, Athanasios; Elia, Iliada (International Group for the Psychology of Mathematics Education, 2004)
      The main objective of this study is to investigate the role of four different modes of representation in mathematical problem solving (MPS), and more specifically to develop a model, which provides information about the ...
    • Article  

      Efficient gossip and robust distributed computation 

      Georgiou, Chryssis; Kowalski, D. R.; Shvartsman, A. A. (2005)
      This paper presents an efficient deterministic gossip algorithm for p synchronous, crash-prone, message-passing processors. The algorithm has time complexity T=O(log2p) and message complexity M=O(p1+ε), for any ε>0. This ...
    • Conference Object  

      Emotional web-based design: the concepts of emotional experience and emotional expression 

      Lekkas, Zacharias; Tsianos, Nikos; Germanakos, Panagiotis; Mourlas, Constantinos; Samaras, George S. (2011)
      For many years people have been trying to measure differences between individuals. Over the course of time, a combination of developments in statistical know-how and the evolution of thought within psychology enabled the ...
    • Conference Object  

      Employing virtual worlds for HCI education: A problem-based learning approach 

      Zaharias, Panagiotis; Belk, Marios; Samaras, George S. (2012)
      In this paper we describe our experience focused on teaching an introductory course in HCI by employing a 3D virtual world. Our main pedagogical philosophy is presented which claims that problem-based learning activities ...
    • Conference Object  Open Access

      Enquiry-based learning using pictures: the geograph project 

      Barker, Philip (University of Cyprus, 2010)
      This paper discusses the rationale underlying enquiry-based learning in terms of problem-solving activity and the technical infrastructure needed to support it. Some of the issues underlying the implementation of this ...
    • Conference Object  Open Access

      Evaluation of courseware and learning environments in an electromagnetics course enhanced by computer assisted instruction 

      Martín i Batlle, Cristina; de Bruijn, Imme; Mul de, Frits F.M. (Pedagogical Faculty of University of Ostrava, 2001)
      At the University of Twente the first year electromagnetism course has been restructured. A web-based course consisting of different exercises (most of them using a link with Maple) and PowerPoint presentations has been ...
    • Book Chapter  

      An exploratory study about the role of epistemological beliefs and dispositions on learners' thinking about an ill-defined issue in solo and duo problem-solving contexts 

      Valanides, Nicos; Angeli, Charoula (Springer Science + Business Media, 2008)
      This chapter examines the relationship between epistemological beliefs and dispositions and their role on ill-defined problem solving in solo and duo contexts. The results showed that different aspects of epistemological ...
    • Article  

      Facets of the fully mixed nash equilibrium conjecture 

      Feldmann, R.; Mavronicolas, Marios; Pieris, Andreas (2008)
      In this work, we continue the study of the many facets of the Fully Mixed Nash Equilibrium Conjecture, henceforth abbreviated as the FMNE Conjecture, in selfish routing for the special case of n identical users over two ...
    • Article  

      Failure management in Grids: The case of the EGEE infrastructure 

      Neocleous, Kyriacos; Dikaiakos, Marios D.; Fragopoulou, Paraskevi; Markatos, Evangelos P. (2007)
      The emergence of Grid infrastructures like EGEE has enabled the deployment of large-scale computational experiments that address challenging scientific problems in various fields. However, to realize their full potential, ...
    • Article  

      A fully conforming spectral collocation scheme for second- and fourth-order problems 

      Karageorghis, Andreas (1995)
      A spectral element scheme is presented for the solution of second- and fourth-order problems in two and three space dimensions. This scheme is based on a collocation formulation and, for a certain class of problems, results ...
    • Article  

      The Functions of Pictures in Problem Solving 

      Elia, Iliada; Philippou, George N. (International Group for the Psychology of Mathematics Education, 2004)
      In the present study, we assert that pictures serve four functions in problem solving: decorative, representational, organizational and informational. We, therefore, investigate the effects of pictures based on their ...
    • Conference Object  

      Fuzzy backward congestion notification (FBCN) congestion control in asynchronous transfer mode (ATM) networks 

      Pitsillides, Andreas; Sekercioglu, Y. Ahmet; Ramamurthy, Gopalakrishnan (IEEE, 1995)
      In this paper, we study the performance of a fuzzy control scheme as a first step to develop better control strategies for avoiding congestion and attaining high link utilisation in ATM based networks. Due to the complexity ...
    • Article  

      Graph theoretical structures in logic programs and default theories 

      Dimopoulos, Yannis; Torres, A. (1996)
      In this paper we present a graph representation of logic programs and default theories. We show that many of the semantics proposed for logic programs with negation can be expressed in terms of notions emerging from graph ...
    • Article  

      A graph-theoretic network security game 

      Mavronicolas, Marios; Lesta, Vicky Papadopoulou; Philippou, Anna; Spirakis, Paul G. (2005)
      Consider a network vulnerable to viral infection. The system security software can guarantee safety only to a limited part of the network. We model this practical network scenario as a non-cooperative multi-player game on ...
    • Conference Object  

      Graphical inference methods for fault diagnosis based on information from unreliable sensors 

      Le, T.; Hadjicostis, Christoforos N. (2006)
      In this paper, we study the application of decoding algorithms to the multiple fault diagnosis (MFD) problem. Prompted by the resemblance between graphical representations for MFD problems and parity check codes, we develop ...