Now showing items 1074-1093 of 1727

    • [OA203] Assessment of radiation exposure in a newly formed nuclear medicine department 

      Hadjitheodorou, Panayiotis; Polycarpou, Irene; Fesas, Andreas; Pourkhessalian, Reza; Vrachimis, Alexis; Anagnostopoulos, Giorgos (2018-08-01)
      PurposeIn an oncology nuclear medicine department, radioisotopes are not only used for tumor detecting, staging, evaluation of therapy response but also for therapeutic purposes. This study documents the radiation exposure ...
    • Objects, entities, behaviors, and interactions: A typology of student-constructed computer-based models of physical phenomena 

      Louca, Loucas T.; Zacharia, Zacharias C.; Michael, Michalis; Constantinou, Constantinos P. (2011-01-01)
      The purpose of this study was to develop a framework for analyzing and evaluating student-constructed models of physical phenomena and monitoring the progress of these models. Moreover, we aimed to examine whether this ...
    • Observations and a model for the infrared continuum of Centaurus A 

      Alexander, David M.; Efstathiou, Andreas; James H. Hough, James; Aitken, David K.; Lutz, Dieter; Roche, Patrick F.; Sturm, Eckhard (1999-11-21)
      We present ISOSWS, ISOPHOT_S and 8-13 μm observations of Centaurus A which show prominent PAH and silicate features. These and other data are used to construct a model for the infrared continuum. We find that, in a small ...
    • Observations of hyperluminous infrared galaxies with the Infrared Space Observatory: Implications for the origin of their extreme luminosities 

      Verma, Aprajita; Rowan-Robinson, Michael; McMahon, R. G.; Efstathiou, Andreas (2002-09-21)
      We present 7-180 μm photometry of a sample of hyperluminous infrared galaxies (HyLIGs) obtained with the photometer and camera mounted on the Infrared Space Observatory. We have used radiative transfer models of obscured ...
    • Observations of the Hubble Deep Field South with the Infrared Space Observatory - I. Observations, data reduction and mid-infrared source counts 

      Oliver, Sebastian James; Robert Mann, Robert; Carballo, Ruth; Franceschini, Alberto; Rowan-Robinson, Michael; Kontizas, Maria; Dapergolas, Anastasios; Kontizas, Evanghelos; Verma, Aprajita; Elbaz, David; Granato, Gianluigi; Silva, Laura Da; Rigopoulou, Dimitra; González-Serrano, José Ignacio; Serjeant, Stephen B.G.; Efstathiou, Andreas; Van Der Werf, Paul P. (2002-05-21)
      We present results from a deep mid-infrared survey of the Hubble Deep Field South (HDF-S) region performed at 6.7 and 15 μm with the ISOCAM instrument on board the Infrared Space Observatory (ISO). The final map in each ...
    • Observations of the Hubble Deep Field South with the Infrared Space Observatory - II. Associations and star formation rates 

      Robert Mann, Robert; Oliver, Sebastian James; Carballo, Ruth; Franceschini, Alberto; Rowan-Robinson, Michael; Heavens, Alan F.; Kontizas, Maria; Elbaz, David; Dapergolas, Anastasios; Kontizas, Evanghelos; Granato, Gianluigi; Silva, Laura Da; Rigopoulou, Dimitra; González-Serrano, José Ignacio; Verma, Aprajita; Serjeant, Stephen B.G.; Efstathiou, Andreas; Van Der Werf, Paul P. (2002-05-21)
      We present results from a deep mid-infrared survey of the Hubble Deep Field South (HDF-S) region performed at 6.7 and 15 μm with the ISOCAM instrument on board the Infrared Space Observatory (ISO). We find reliable ...
    • Observations of the Hubble Deep Field with the Infrared Space Observatory - I. Data reduction, maps and sky coverage 

      Serjeant, Stephen B.G.; Eaton, Nick; Oliver, Sebastian James; Efstathiou, Andreas; Goldschmidt, Pippa; Robert Mann, Robert; Mobasher, Bahram; Rowan-Robinson, Michael; Sumner, Timothy J.; Danese, Luigi; Elbaz, David; Franceschini, Alberto; Egami, Eiichi; Kontizas, Maria; Andy R. Lawrence, Andy; McMahon, R. G.; Nørgaard-Nielsen, Hans Ulrik; Pérez-Fournón, Ismaël; González-Serrano, José Ignacio (1997-01-01)
      We present deep imaging at 6.7 and 15 μm from the CAM instrument on the Infrared Space Observatory (ISO), centred on the Hubble Deep Field (HDF). These are the deepest integrations published to date at these wavelengths ...
    • Observations of the Hubble Deep Field with the Infrared Space Observatory - II. Source detection and photometry 

      Goldschmidt, Pippa; Oliver, Sebastian James; Serjeant, Stephen B.G.; Baker, Amanda C.; Eaton, Nick; Efstathiou, Andreas; Gruppioni, Carlotta; Robert Mann, Robert; Mobasher, Bahram; Rowan-Robinson, Michael; Sumner, Timothy J.; Danese, Luigi; Elbaz, David; Franceschini, Alberto; Egami, Eiichi; Kontizas, Maria; Andy R. Lawrence, Andy; McMahon, R. G.; Nørgaard-Nielsen, Hans Ulrik; Pérez-Fournón, Ismaël; González-Serrano, José Ignacio (1997-01-01)
      We present positions and fluxes of point sources found in the Infrared Space Observatory (ISO) images of the Hubble Deep Field (HDF) at 6.7 and 15 μm. We have constructed algorithmically selected 'complete' flux-limited ...
    • Observations of the Hubble Deep Field with the Infrared Space Observatory - III. Source counts and P(D) analysis 

      Oliver, Sebastian James; Goldschmidt, Pippa; Franceschini, Alberto; Serjeant, Stephen B.G.; Efstathiou, Andreas; Verma, Aprajita; Gruppioni, Carlotta; Eaton, Nick; Robert Mann, Robert; Mobasher, Bahram; Pearson, Chris P.; Rowan-Robinson, Michael; Sumner, Timothy J.; Danese, Luigi; Elbaz, David; Egami, Eiichi; Kontizas, Maria; Andy R. Lawrence, Andy; McMahon, R. G.; Nørgaard-Nielsen, Hans Ulrik; Pérez-Fournón, Ismaël; González-Serrano, José Ignacio (1997-01-01)
      We present source counts at 6.7 and 15 μm from our maps of the Hubble Deep Field (HDF) region, reaching 38.6 μJy at 6.7 μm and 255 μJy at 15 μm. These are the first ever extragalactic number counts to be presented at 6.7 ...
    • Observations of the Hubble Deep Field with the Infrared Space Observatory - IV. Association of sources with Hubble Deep Field galaxies 

      Robert Mann, Robert; Oliver, Sebastian James; Serjeant, Stephen B.G.; Rowan-Robinson, Michael; Baker, Amanda C.; Eaton, Nick; Efstathiou, Andreas; Goldschmidt, Pippa; Mobasher, Bahram; Sumner, Timothy J.; Danese, Luigi; Elbaz, David; Franceschini, Alberto; Egami, Eiichi; Kontizas, Maria; Andy R. Lawrence, Andy; McMahon, R. G.; Nørgaard-Nielsen, Hans Ulrik; Pérez-Fournón, Ismaël; González-Serrano, José Ignacio (1997-01-01)
      We discuss the identification of sources detected by the Infrared Space Observatory (ISO) at 6.7 and 15 μm in the Hubble Deep Field (HDF) region. We conservatively associate ISO sources with objects in existing optical and ...
    • Observations of the Hubble Deep Field with the Infrared Space Observatory - V. Spectral energy distributions, starburst models and star formation history 

      Rowan-Robinson, Michael; Robert Mann, Robert; Oliver, Sebastian James; Efstathiou, Andreas; Eaton, Nick; Goldschmidt, Pippa; Mobasher, Bahram; Serjeant, Stephen B.G.; Sumner, Timothy J.; Danese, Luigi; Elbaz, David; Franceschini, Alberto; Egami, Eiichi; Kontizas, Maria; Andy R. Lawrence, Andy; McMahon, R. G.; Nørgaard-Nielsen, Hans Ulrik; Pérez-Fournón, Ismaël; González-Serrano, José Ignacio (1997-01-01)
      We have modelled the spectral energy distributions of the 13 Hubble Deep Field (HDF) galaxies reliably detected by the Infrared Space Observatoiy (ISO). For two galaxies the emission detected by ISO is consistent with being ...
    • Obstetrical brachial plexus palsy: Lessons in functional neuroanatomy 

      Johnson, Elizabeth O.; Troupis, Theodore G.; Michalinos, Adamantios; Dimovelis, John; Soucacos, Panayotis N. (2013-01-24)
      Obstetrical branchial plexus paralysis is a serious and possibly disabling disorder. While thoroughly described as a clinical entity, much concerning its pathogenesis is still unknown. Basic science studies alongside with ...
    • Occupational health and safety management in the context of an ageing workforce 

      Varianou-Mikellidou, Cleo; Boustras, Georgios; Dimopoulos, Christos; Wybo, Jean Luc; Guldenmund, Frank W.; Nicolaidou, Olga; Anyfantis, Ioannis (2019-07-01)
      During the last decades, humanity experiences an increasing demographic change. The relative percentage of older people is growing, while fewer young employees are entering the labour force. This phenomenon is directly ...
    • Old and new policies in dialogue: Greek-Cypriot teachers' interpretations of a peace-related initiative through existing policy discourses 

      Charalambous, Panayiota; Charalambous, Constadina; Zembylas, Michalinos (2014-02-01)
      This paper looks at teachers' interpretations of a recent and controversial Greek-Cypriot policy initiative, which aimed to promote 'peaceful coexistence' between the two rival communities in conflict-ridden Cyprus. ...
    • Olympic legacy and cultural tourism: Exploring the facets of Athens' Olympic heritage 

      Boukas, Nikolaos; Ziakas, Vassilios; Boustras, Georgios (2013-04-29)
      This study examines the effects of the Olympic Games on Athens' cultural tourism and the city's potential to leverage the Olympic legacy in synergy with its rich heritage in order to enhance its tourism product during the ...
    • On radiocoloring hierarchically specified planar graphs: PSPACE-completeness and approximations 

      Andreou, Maria I.; Fotakis, Dimitris A.; Lesta, Vicky Papadopoulou; Nikoletseas., Sotiris E.; Spirakis, Paul G. (2015-01-01)
      Hierarchical specifications of graphs have been widely used in many important applications, such as VLSI design, parallel programming and software engineering. A well known hierarchical specification model, considered in ...
    • On radiocoloring hierarchically specified planar graphs: PSPACE-completeness and approximations 

      Andreou, Maria I.; Fotakis, Dimitris A.; Nikoletseas., Sotiris E.; Lesta, Vicky Papadopoulou; Spirakis, Paul G. (2002-01-01)
      Hierarchical specifications of graphs have been widely used in many important applications, such as VLSI design, parallel programming and software engineering. A well known hierarchical specification model, considered in ...
    • On super-strong wilf equivalence classes of permutations 

      Hadjiloucas, Demetris; Michos, Ioannis C.; Savvidou, Christina (2018-06-22)
      Super-strong Wilf equivalence is a type of Wilf equivalence on words that was originally introduced as strong Wilf equivalence by Kitaev et al. [Electron. J. Combin. 16(2)] in 2009. We provide a necessary and sufficient ...
    • On the average Cartier-Foata height of traces 

      Krob, Daniel; Mairesse, Jean; Michos, Ioannis C. (2001-01-01)
      The height of a trace is the height of the corresponding heap of pieces in X.G. Viennot's formalism, or equivalently the number of components in its Cartier-Foata decomposition. Let h(t) and |t| be, respectively, the height ...
    • On the average parallelism in trace monoids 

      Michos, Ioannis C.; Mairesse, Jean; Michos, Ioannis C. (2002-01-01)