Browsing NUP Academic Publications - Ακαδημαϊκές Δημοσιεύσεις ΠΝΠ by Title

Now showing items 64-83 of 1212

  • Can recessions be predicted? 

    Makridakis, Spyros; Bernand, Majani (Elsevier Ltd, 1977-04)
    Can recessions, or serious turning points in general, be predicted? Or do forecasters tend to assume that the future will continue as an extension of the near past. Theoretical evidence and practical observations tend to ...

  • Caracteres specifiques des incitations financieres au developpement regional en Grece (1982-1986) 

    Athanasopoulos, Constantinos GE.; Courteoux, Jean-Paul (Armand Colin, 1987)
    Les lois de développement qui ont été périodiquement mises en oeu v re en Grèce n'ont pas toujours comporté d'incitations fin a ncières. Cette absence pouvait s'expliquer de plusieurs manl eres, soi t que l'on ait préféré ...

  • CEDD: Color and Edge Directivity Descriptor: A Compact Descriptor for Image Indexing and Retrieval 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis (Springer-Verlag, 2008)
    This paper deals with a new low level feature that is extracted from the images and can be used for indexing and retrieval. This feature is called “Color and Edge Directivity Descriptor” and incorporates color and texture ...

  • Cellular Automata Ants 

    Bitsakidis, Nikolaos P.; Dourvas, Nikolaos I.; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch. (Springer, 2017)
    During the last decades much attention was given to bio-inspired techniques able to successfully handle really complex algorithmic problems. As such Ant Colony Optimization (ACO) algorithms have been introduced as a ...

  • Change Process, Supports and Barriers in Residential Treatment Program: A Qualitative Approach 

    Flora, Katerina (Open Access Library Journal, 2014)
    Various studies have employed quantitative and qualitative methods in order to explore the process of behavioral change emerging during a drug addiction treatment, i.e. the factors both encouraging and discouraging such ...

  • Chronology of the Last Six Recessions 

    Makridakis, Spyros (Pergamon press ltd, 1982)
    How successful have economists and other business forecasters been in predicting recessions? This question is of considerable practical value since the level of economic activity greatly influences budgets and other plans ...

  • The Classification of Urban Uses 

    Pissourios, Ioannis; Lagopoulos, Alexandros (MDPI, 2017)
    The classification of uses is one of the central issues of urban planning, since it is only by referring to groups of uses that we can achieve the simplification and, ultimately, the understanding of urban space. However, ...

  • CLT: An Interactive Approach for Illustrating the Central Limit Theorem 

    Makridakis, Spyros (Taylor & Francis, Ltd., 1979-05)
    In classical statistics, inferences about the popula- tion mean, confidence intervals, or testing of hypoth- eses are based on the sampling distribution of X. For the statistician or the mathematically sophisticated, there ...

  • Co.Vi.Wo.: Color Visual Words Based on Non-Predefined Size Codebooks 

    Chatzichristofis, Savvas A.; Iakovidou, Chryssanthi; Boutalis, Yiannis; Marques, Oge (IEEE, 2012)
    Due to the rapid development of information technology and the continuously increasing number of available multimedia data, the task of retrieving information based on visual content has become a popular subject of scientific ...

  • Coherent risk measures under filtered historical simulation 

    Giannopoulos, Kostas; Tunaru, Radu (Elsevier, 2005-04)
    Recent studies have strongly criticised conventional VaR models for not providing a coherent risk measure. Acerbi provides the intuition for an entire family of coherent measures of risk known as “spectral risk measures” ...

  • Color and Edge Directivity Descriptor on GPGPU 

    Iakovidou, Chrysanthi; Bampis, L.; Chatzichristofis, Savvas A.; Boutalis, Yiannis; Amanatiadis, A. (IEEE (Computer Society), 2015)
    Image indexing refers to describing the visual multimedia content of a medium, using high level textual information or/and low level descriptors. In most cases, images and videos are associated with noisy and incomplete ...

  • The Combination of Forecasts 

    Winkler, Robert L.; Makridakis, Spyros (Wiley, 1983)
    Aggregating information by combining forecasts from two or more forecasting methods is an alternative to using just a single method. In this paper we provide extensive empirical results showing that combined forecasts ...

  • Combining Color and Spatial Color Distribution Information in a Fuzzy Rule Based Compact Composite Descriptor 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis S.; Lux, Mathias (Springer, 2011)
    In this paper, a novel low level feature for content based image retrieval is presented. The proposed feature structure combines color and spatial color distribution information. The combination of these two features in ...

  • Combining Syntactic and Semantic Evidence for Improving Matching over Linked Data Sources 

    Christodoulou, Klitos; Fernandes, Alvaro A.A.; Paton, Norman W. (Springer Link, 2015-11)
    In the context of Linked Data (LD) sources, the ability to traverse links and retrieve further information can be exploited to harvest semantic annotations. Such annotations can, in turn, underpin the inference of semantic ...

  • A Comment on a John Geometres' Poem 

    Katsaros, Vasilis (Walter De Gruyter Inc., 2015)
    The epigram "Είς τόν εαυτού πατέρα" by John Geometres is considered a lyrical sepulchral poetic masterpiece, since it densely captures the poet's emotional state within 11 lines. The particular epigram has already been ...

  • Commentary on the Makridakis Time Series Competition (M-Competition) 

    Makridakis, Spyros (1983)
    In 1982, the Journal of Forecasting published the results of a forecasting competition organized by Spyros Makridakis (Makridakis et al., 1982). In this, the ex ante forecast errors of 21 methods were compared for forecasts ...

  • Commitment policy and optimal positive long-run inflation 

    Pontiggia, Dario (2008)
    This paper studies different types of commitment policy in an economy where the deterministic steady state is inefficient. We show how a policy suggested by the approach of policy design entails positive long-run inflation, ...

  • Communication, a managerial myth 

    Tsaklanganos, Angelos (1978-08)
    Comunication is onc of the most widely used and least understood concepts current among managerof modern corporations.

  • Communication: panacea or pain in the neck? 

    Tsaklanganos, Angelos (1978)
    This article analyzes whether communication can solve all management problems. With the rapid technological developments in methods of communication, corporate managers have become more increasingly dependent on electronic ...

  • CoMo: A Compact Composite Moment-Based Descriptor for Image Retrieval 

    Vassou, Sotiris A.; Anagnostopoulos, Nektarios; Amanatiadis, Angelos; Christodoulou, Klitos; Chatzichristofis, Savvas A. (ACM, 2017-06-19)
    Low level features play a vital role in image retrieval. Image moments can effectively represent global information of image content while being invariant under translation, rotation, and scaling. This paper briefly presents ...