Publications by Type: Conference Paper

Recently there has been increasing interest of scientists forthe performance of singing or reciting voices of the past inutilising analysis-synthesis methods. In the domain ofAncient Greek musicology indeed, where we find theroots of the occidental music, the main research has beendone mostly by scholars of classical Greek literature.However there is still is a vast territory for research inaudio performances to be carried out with the help of newdigital technologies.In this paper, we will present an attempt to decode arecited text of Ancient Greek tragedy and render it intosound. At the first paragraph of this article we underlinethe origin of music arising from the melodicity of speechin Ancient Greek tragedy. In the second paragraph, wedescribe the methodology we have used in order toanalyse the voice of S. Psaroudak&s, himself professor ofAncient Greek music, by an open source prosodic featureextraction tool based on Praat. We give a description ofthe prosodic analysis, implementation details and discussits feature extension capabilities as well. Last, we refer tothe difference between the Ancient and Modern Greekphonological system, the application of this research inmusic and further development.

We review recent progress in the realm of ultra-slow and stored light inside metamaterial waveguides. We elucidate a number of critical issues pertaining to the study of light propagation in various slowlight metamaterial structures. © 2008 Optical Society of America.

We review recent progress in the realm of ultra-slow and stored light inside metamaterial waveguides. We elucidate a number of critical issues pertaining to the study of light propagation in various slowlight metamaterial structures. © 2008 Optical Society of America.

We review recent progress in the realm of ultra-slow and stored light inside metamaterial waveguides. We elucidate a number of critical issues pertaining to the study of light propagation in various slow-light metamaterial structures. ©2008 Optical Society of America.

Recent observations as well as theoretical studies of YSO jets suggest the presence of two steady components: a disk wind type outflow needed to explain the observed high mass loss rates and a stellar wind type outflow probably accounting for the observed stellar spin down. In this framework, we construct numerical two-component jet models by properly mixing an analytical disk wind solution with a complementary analytically derived stellar outflow. Their combination is controlled by both spatial and temporal parameters, in order to address different physical conditions and time variable features. We study the temporal evolution and the interaction of the two jet components on both small and large scales. The simulations reach steady state configurations close to the initial solutions. Although time variability is not found to considerably affect the dynamics, flow fluctuations generate shocks, whose large scale structures have a strong resemblance to observed YSO jet knots.

Recently there has been a considerable interest in metamaterial waveguide structures capable of dramatically slowing down or, even, completely stopping light. Here, we shall explain in some detail the working principle behind the deceleration and/or stopping of light in metamaterial structures, and review the various, metamaterial-enabled, methods that have been proposed thus far towards achieving such a goal. Further, we will concisely describe how one can construct zero-loss metamaterials over a continuous and broad (but not infinite) range of frequencies, which is an essential prerequisite for any slow-light system. Moreover, it will be explained that inside such waveguide structures light can in principle be stopped (zero group velocity, νg = 0) even in the presence of losses. By nature, metamaterial-enabled schemes for stopping/storing light invoke solid-state materials and, as such, are not subject to low-temperature or atomic coherence limitations. Furthermore, these methods simultaneously allow for broad bandwidth operation, since they do not rely on group index resonances; large delay-bandwidth products, since a wave packet can, in principle, be completely stopped and buffered indefinitely; and (for the case, in particular, where a negative-index metamaterial is used) high, almost 100%, in/out-coupling efficiencies. Thus, we conclude that these methods for trapping photons, which can be realised using existing technology, could open the way to a multitude of hybrid optoelectronic devices to be used in 'quantum information' processing, communication networks and signal processors and may conceivably herald a new realm of combined metamaterials and slow light research. © 2009 SPIE.

We present results on the X-ray source populations of nearby spiral and star-forming galaxies. The sample of galaxies includes the nearby spiral galaxy M81 and star-forming galaxies with stellar populations in the 10-100Myr range. We use HST data in order to classify the X-ray sources to HMXBs, LMXBs and globular clusters, and identify any SNRs or background AGNs. We discuss the spectral and temporal characteristics of the different sub-populations in these galaxies, and their implications for the sources' nature. We present the X-ray luminosity functions (XLF) of the discrete sources from the individual as well as the co-added observations and we discuss the dependence of the XLF on the age of the stellar populations. In the case of M81 we find a population of sources in the 10^{36}-10^{37} erg s^{-1} luminosity range with early-type counterparts, while the HMXBs in the star-forming galaxies have generally higher luminosities. We also present results from Chandra observations of the SMC which extend the XLFs down to luminosities of 10^{32} erg s^{-1} and show evidence for the onset of the propeller effect at low luminosities.

One of the most important evolutions marking modern Greek culture is the ever increasing presence of women in the realms of both economics and politics. This phenomenon has given significant rise to new social concerns among which lies the issue of linguistic adaptation to the new roles of the female gender. The present research is an interdisciplinary one, related both to social sciences and linguistics and dealing with the analytical category of “social gender.”  Specifically, the research in question is interested in the field of politics, which is traditionally the last bulwark of Greek patriarchal society. In other words, this investigation raises the question of whether or not the female presence in the centers of authority and power is adequately reflected in the Greek language. Moreover, the following parameters are thoroughly investigated: firstly it is attempted to register the grammatical problems emerging after the end of the male monopoly concerning power, while at the same time the first linguistic approaches to the aforementioned problem are examined.  There is also mention of the ways in which the State and other official bodies deal with this issue as well as of the everyday use of gender demarcations of various offices in the Media. Lastly, the attitude of women, either individually or collectively, towards this issue is methodically examined.Full texthttps://dspace.flinders.edu.au/xmlui/bitstream/handle/2328/8106/449-466.pdf;jsessionid=9E4B03B46AD0B1B71C19C40869981F67?sequence=1

The present study investigates the principal morphological and sedimentological (textural) characteristics of the beach-zones along the Tigani and Mikalis Bays, which are located at the southeastern coast of Samos Island. It is also examined their retreat due to the expected sea level rise induced by the climatic change. The beach zones under investigation has been formed in front of alluvial coastal plains, while at their western end host the mouth of small (ephemeral) rivers. Their width varies between 12 and 25 m, becoming narrower towards their eastern ends; this shows that the longshore sediment transport, which is from W to E due to their coastline orientation relatively to incoming waves, has not been strong enough to move most of the sediment eastwards. The subaerial part of both beach zones consists of gravels, while their subaqueous part is covered by sand. The presence of low dunes at the backshore odf the Thiogani Bay in association with the lack of sand between the dunes and the shoreface indicate that the beach zone is under erosion. Furthermore, with respect to the expected sea-level rise the shoreline of Tigani bay may be retreat by 15-20 m, when the nearby shoreline of Mikalis bay could retreat 12-15 m.

WHEN CITING:   

1. Καμπερίδου, Ρένα (2008). Το 'Σκοτεινό' Κοινωνικό Κεφάλαιο του Αθλητισμού:  η γυάλινη οροφή και  'ο αγωγός διαρροής' .  Ημερίδα «Γυναίκες και Αθλητισμός», Πάντειο Πανεπιστήμιο Κοινωνικών και Πολιτικών Επιστημών του Διατμηματικού Προγράμματος Σπουδές Φύλου και Ισότητας στις Κοινωνικές και Πολιτικές Επιστήμες, αμφιθέατρο "Σάκη Καράγιωργα", Πάντειο Πανεπιστήμιο, Λ. Συγγρού 136, Νέο Κτήριο, 11 Ιουνίου 2008. DOI: 10.13140/RG.2.1.2277.3600 , ΒΙΒΛΙΟ ΠΡΑΚΤΙΚΩΝ Ι.2.1 in Apella Επίσης βλ. http://www.genderpanteion.gr/gr/2008pdf/imerida11062008.pdf    

•  Kamberidou, I. (2008). 'Dark' Social Capital in Sport: the glass ceiling and the leaky pipeline. Presentation [keynote speaker: http://www.genderpanteion.gr/gr/2008pdf/imerida11062008.pdf] at the “WOMEN AND SPORT” Seminar, Panteion University of Social and Political Sciences. Gender Studies Centre of Panteios University, Athens, Greece: http://www.genderpanteion.gr/gr/2008pdf/imerida11062008.pdf , http://www.genderpanteion.gr/gr/dialsem\_im.php [presentation in Greek].  I.2  in Apella. Also see I.2.2 in Apella), and Book of Abstracts in Ι.2.1

In this paper we are examining the state of Naxos Island as far as erosion is concerned, using precipitation indexes produced from daily precipitation totals and Geographical Information System (GIS) in order to develop an erosion risk model. Naxos Island belongs to the Cycladic area and is situated at the central Aegean Sea, in Greece. The relief of the island is mountainous, with a central mountain chain crossing it from north to south. The geology of Naxos is characterised by a migmatite irruption, metamorphic rocks (schist, gneiss, marble), and sedimentary rocks (Neogenic and Quaternary deposits). Tectonism of the area is low nowadays but in the past geological time has played a major role defining the present morphology. Although the mean annual precipitation appear to be low (~360.0 mm), the erosion processes of the area are very intense, because of the intensive character of precipitation, the high slope relief, the differential lithology and the absence of important land cover. The aforementioned factors are the major contributing to the formation of the present denudated morphology mainly because of the intense run off.

DOI: 10.13140/RG.2.1.2821.0725Full pdf (proceedings and article) in Research Gate (RG)--------------------------------------------------------------------------------------------------------- Gender-constrained educational choices, traditional-anachronistic perspectives, the life-work balance or rather imbalance, the lack of affordable child care facilities, the glass ceiling, the leaky pipeline, among other things, have contributed to the declining interest of Greek women in science and technology. This paper focuses on the factors that contribute to Greek women’s non-engagement or under-representation in ICT related fields, such as computing. It examines the gender-constrained institutions in Greece while providing an overview of the gender distribution in scientific research and in the Greek academia, where only about one third (27%) of the teaching staff in universities are women. Digital illiteracy has been detected amongst university students in Greece, over half of which are women, as well as amongst primary and secondary school teachers throughout the country who explicitly express a technophobic unwillingness to use computers in their classrooms, although they claim to agree on their significant educational value and usefulness. Although the Greek Ministry of Education had implemented the training of 76,000 teachers in ICTs, it seems to have failed to reach the aspired levels of effectiveness, in a society where the participation of women in the teaching profession—primary and secondary education—is over 50%. The majority of the respondents from rural, agricultural,  urban areas of Greece claim that they have not benefited by the technology classes or computer lessons they had received in high school, and not only. The gender variable plays a decisive role in the development of attitudes, i.e. the use of computers or the internet as a tool may be gender-neutral, however access to and motivation of use is gender-constrained. The Greek public school system’s inadequate technological infrastructures, deficiencies in the vocational orientation of students and the continuous techno-education of teachers, the lack of collaboration of the education system with the employment sector and the ICT industry— along with the family-career imbalance, namely the incompatibility of private life and career which is essentially a female problem— have made it impossible for the gender subject to keep up with the accelerated speed of technological developments. An ‘Education-Engagement-Retention Action Plan’ is required to change attitudes and promote women in science and technology, in the academia, etc.: (1) Child care facilities, flexi-hours, family support programmes, and a family-friendly working environment. (2) The establishment of an attractive open labour market that recruits and retains women in science and technology.

Gender-constrained educational choices, traditional-anachronistic perspectives, the life-work balance or rather imbalance, the lack of affordable child care facilities, the glass ceiling, the leaky pipeline, among other things, have contributed to the declining interest of Greek women in science and technology. This paper focuses on the factors that contribute to Greek women’s non-engagement or under-representation in ICT related fields, such as computing. It examines the gender-constrained institutions in Greece while providing an overview of the gender distribution in scientific research and in the Greek academia, where only about one third (27%) of the teaching staff in universities are women. Digital illiteracy has been detected amongst university students in Greece, over half of which are women, as well as amongst primary and secondary school teachers throughout the country who explicitly express a technophobic unwillingness to use computers in their classrooms, although they claim to agree on their significant educational value and usefulness. Although the Greek Ministry of Education had implemented the training of 76,000 teachers in ICTs, it seems to have failed to reach the aspired levels of effectiveness, in a society where the participation of women in the teaching profession—primary and secondary education—is over 50%. The majority of the respondents from rural, agricultural,  urban areas of Greece claim that they have not benefited by the technology classes or computer lessons they had received in high school, and not only. The gender variable plays a decisive role in the development of attitudes, i.e. the use of computers or the internet as a tool may be gender-neutral, however access to and motivation of use is gender-constrained. The Greek public school system’s inadequate technological infrastructures, deficiencies in the vocational orientation of students and the continuous techno-education of teachers, the lack of collaboration of the education system with the employment sector and the ICT industry— along with the family-career imbalance, namely the incompatibility of private life and career which is essentially a female problem— have made it impossible for the gender subject to keep up with the accelerated speed of technological developments. An ‘Education-Engagement-Retention Action Plan’ is required to change attitudes and promote women in science and technology, in the academia, etc.: (1) Child care facilities, flexi-hours, family support programmes, and a family-friendly working environment. (2) The establishment of an attractive open labour market that recruits and retains women in science and technology.

Kamberidou, I. (2008). ‘Eliminating the Leaky Pipeline: Sustaining-Normalizing-Engendering Women's Careers as Academics, Researchers and Professionals in Engineering, Computers and the Sciences’. Presentation at the UNICAFE Dissemination Conference "Beyond the Glass Ceiling: Women Academics in Engineering, Technology and Life Sciences across Europe", November 12-13, 2008, venue: Istanbul Technical University, Faculty of Architecture. Sixth Research Framework Programme of the European Union SAS6-CT-2006-036695 (http://www.womenacademics2008org). ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- My presentation discusses the obstacles that female students face as they attempt to access higher education and achieve success and propose an action plan. Such an action plan requires  Innovative strategies that facilitate academic achievement;  teacher-training to learn innovative, practical and successful  strategies that can be implemented at their institutions  that will enable them to help women students  overcome obstacles on their  path towards a college degree; promoting institutional policies that support retention efforts; financial aid; developing corporate and community partnership; creating a campus atmosphere that promotes engagement and success, among other things  Focusing on the factors that contribute to Greek women’s non-engagement and under-representation in engineering and technology, and in particular the technological gender gap or digital divide in the knowledge economy, this presentation will examine the ‘gendered’ educational institutions in Greece while providing an overview of the gender distribution in the Greek academia.  Undeniably, the overall participation of women in engineering, science and technology is low. Women still comprise a minority in the Greek academia, and especially in the higher academic hierarchies. The ‘genderedness’ of educational institutions in Greece, traditional perspectives, the glass ceiling, the leaky pipeline, the life/work balance or rather imbalance, the lack of affordable child care facilities, among other things, have contributed to the declining interest of women for engineering and technology study programs. Irrefutably education is the place to start, given that socially inclusive educational systems and equity policies are key variables to responding to global change, however it is not enough. Promoting new pedagogical applications as well as recruiting or recognizing the largely untapped pool of talent  What is vital is retention. Retaining, women in their careers in engineering, in science and technology, and in R&D, in addition to increasing their participation in leadership— from decision-making to execution phases— in the light of demographic pressures, aging populations and the low levels of immigration tolerance around Europe. Retention requires the establishment of nurturing inclusive workplace cultures, supportive and socially inclusive working environments, the application of best practices, sustainable diversity efforts and ‘sensitivity’ training to raise awareness. Enhancing conditions for research and innovation in Europe calls for inclusive organizational cultures that allow women to function at their full potential for the benefit of their organization/institution, thereby reproducing female participation.    

Optically Stimulated Luminescence (OSL) dating techniques are extensivelly used in nowadays to provide chronological information of sediment material (Zacharias et al., in press) related to landscape evolution caused by natural phenomena or influenced by human activities. Within the present study, OSL was employed to provide the age profile of sand dune formations from Mainland Greece (Peloponnese) and the islands of Crete and Corfu. The application of OSL dating was practised on quartz samples extracted from the sedimentmaterial using a modified SAR protocol (Murray and Wintle 2000). The estimation of samples dosimetry was based on gamma- (Tzortzis and Tsertos, 2004) and alpha-spectrometry (Michael and Zacharias, 2000) to provide the U, Th and K concentrations. The so far dating results indicate for ages that fall within Late Holocene to modern periods (4,000 - 500 years). The study will report on the geomorphological, micromorphological and dating results in anattempt to form the environmental and chronological framework of the dune formations in Greece.

The geochemical characteristics of topsoil depend on many variables such as thelithological nature of the geological environment, climatic conditions and humaneffects. This paper focuses οn assessing the contribution of lithology to soilgeochemistry, through the process of erosion. For this purpose, extensive field workwas carried out, including lithologic recognition of formations, rock and soil samplingand finally definition of possible human impacts that affect the chemical status ofsoils. Supplementary information was adopted from the pre-existing literature for thearea, as well as from geomorphological characteristics, climatic conditions andchemical analyses of both rock and soil. Thus, a primary database has beendeveloped, in order to asses the correlation between susceptibility of outcroppinggeological formations and soil geochemical status. The area of Kopaida basin, incentral Greece, was chosen as a case study, and the final outcome was the developingof an erosion risk map for the prevailing geological formations, which may be used asuseful tool for developing appropriate strategies on environmental protection, hazardassessment and regional planning.

An alternative to TRO model of a W UMa-type star is presented in which the binary is past mass exchange with mass ratio reversal. The secondary is hydrogen depleted and both components are in thermal equilibrium. Evolution in contact is driven by orbital angular momentum loss and mass transfer from the secondary to primary component, similarly as it is observed in Algols. Temperature equalization of both components results from an assumed energy transfer by a large scale flow encircling the whole system in the common envelope.

Erosion represents a natural process, during which particles of geologicalformations are carried away by water, wind or by their combination. It is asignificant social and economic problem, which makes research on land and watermanagement necessary. Monitoring of erosion is needed in order to predict thedevelopment of the incident and moderate it.The selected study area is the Syros Island, a small Cycladic island. In order toassess erosion risk index, a number of effective factors were used. These factorswere used as input variables of the risk model, from which derived the outputvariable that lead to the production of the erosion risk map.

We consider the internal shock formation in magnetized outflows and we examine the plastic collision between such relativistic blobs taking into account a possible dissipation of magnetic flux. We find that after the collision a large amount of energy is released in thermal form and consequently we assume that this is transferred into protons which obtain a relativistic Maxwellian distribution. The relativistic thermal proton plasma is dense enough to suffer substantial energy losses through proton-proton interactions and thus to transfer its initial energy into photons, electron-positron pairs and neutrinos. We estimate the radiated spectrum by following the evolution of protons, electrons and photons as they interact with each other and with the magnetic field as well.

This study focuses on the phenomenon of erosion regarding the coastal dune system inNaxos island (Cyclades), Greece. In the western coastal zone of Naxos, several dunefields are observed. Despite the fact that erosion on the inland has become more intenseduring the last years, providing thus sufficient material for the development of new dunefields, the current dunes are retreating.Climate variability and prolonged human activities are the major components that lead tothe dunes’ modification, which is a sign of desertification that comes in accordance withthe recent climate change. The climatic factors that are probably involved in the dunes’erosion are the aeolian blow and the precipitation, which may act in counterbalance to thedunes formation. The climatic data that were used in the analysis include daily values ofprecipitation and wind speed, acquired from the Hellenic National Meteorological Service,for the period from 1955 to 2003.This study results in the main reasons for the retreat of the dune fields, namelyanthropogenic constructions, whose intensity increases because of the touristicdevelopment on the western coastal zone, climatic conditions and wave processes.

A geographical information system (GIS) is more than a sophisticated softwareprogram; it is a powerful tool that can be used effectively in geocultural landscape research. Geocultural landscape researchers analyze the historical content of a present landscape and its landscape evolution over time; they strive to reconstruct historical states of a landscape, using different sources, methods and techniques developed in various disciplines such as archaeology, geography, history, planning sciences as well as in related auxiliary sciences. The general interest of this study is the application of geoinformation technology in the geocultural landscape research.The introductory chapter overviews different functions of a GIS and demonstrates its role in a geocultural landscape analysis. The differences between methodology, science and GIS as a tool are presented, specifically dealing with research issues with a time and space component, as well as their representation in a computer-based system. The chapter concludes with a summary of research issues that may concern the interdisciplinary teams of both landscape researchers and geoinformation scientists.

We demonstrate the deceleration of guided electromagnetic waves propagating along an adiabatically tapered negative-refractive-index metamaterial heterostructure and show that light can ideally be brought to a complete halt. It is analytically shown that, in principle, this method simultaneously allows for broad bandwidth operation (since it does not rely on group index resonances), large delay-bandwidth products (since a wave packet can be completely stopped and buffered indefinitely) and high, almost 100 % in/out-coupling efficiencies. The halting of a monochromatic field component travelling along the heterostructure is demonstrated on the basis of a wave analysis and confirmed in a pertinent ray analysis, which unmistakably illustrates the trapping of the associated light-ray and the formation of a double light-ray cone (optical clepsydra) at the point where the ray is trapped. This method for trapping photons conceivably opens the way to a multitude of hybrid optoelectronic devices to be used in quantum information processing, communication networks and signal processors and may herald a new realm of combined metamaterials and slow light research © 2008 IEEE.

We show how guided electromagnetic waves propagating along an adiabatically tapered negative-refractive-index metamaterial heterostructure can be brought to a complete halt. It is analytically shown that, in principle, this method simultaneously allows for broad bandwidth operation (since it does not rely on group index resonances), large delaybandwidth products (since a wave packet can be completely stopped and buffered indefinitely) and high, almost 100%, in/out-coupling efficiencies. By nature, the presented scheme invokes solid-state materials and, as such, is not subject to low-temperature or atomic coherence limitations. A wave analysis, which demonstrates the halting of a monochromatic field component travelling along the heterostructure, is followed by a pertinent ray analysis, which unmistakably illustrates the trapping of the associated light-ray and the formation of a double light-ray cone ('optical clepsydra') at the point where the ray is trapped. This method for trapping photons conceivably opens the way to a multitude of hybrid optoelectronic devices to be used in 'quantum information' processing, communication networks and signal processors and may herald a new realm of combined metamaterials and slow light research.

A competent method for slowing and completely stopping light, based on wave propagation along an adiabatically tapered negative-refractive-index metamaterial heterostructure, is presented. It is analytically shown that, in principle, this method simultaneously allows for broad bandwidth operation (since it does not rely on group index resonances), large delay-bandwidth products (since a wave packet can be completely stopped and buffered indefinitely) and high, almost 100%, in/out-coupling efficiencies. Moreover, by nature, the presented scheme invokes solid-state materials and, as such, is not subject to low-temperature or atomic coherence limitations. A wave analysis, which demonstrates the halting of a monochromatic field component travelling along the heterostructure, is followed by a corresponding ray analysis that illustrates the trapping of the associated light-ray and the formation of a double light-ray cone ('optical clepsydra'). This method for trapping photons conceivably opens the way to a multitude of hybrid, optoelectronic devices to be used in 'quantum information' processing, communication networks and signal processors, and may herald a new realm of combined metamaterials and slow light research.

Lightwaves guided along an adiabatically tapered negative-index heterostructure can efficiently be brought to a complete halt. We prove this conclusion by means of, both, full-wave and pertinent ray-tracing analyses. © 2007 Optical Society of America.

Using Chandra, XMM-Newton and optical data (published photometric catalogs and our 2dF spectroscopic survey) we study the X-ray binary (XRB) populations of the Small Magellanic Cloud (SMC). We find that the number of Be/X-ray binaries (Be-XRBs) peaks at the age of maximum Be-star formation ~30-70 Myr ago. We also examine the ``overabundance'' of Be-XRBs in the SMC fields covered by Chandra, in comparison with the Milky Way. Even after taking into account the difference in the formation rate of OB stars, we estimate that Be-XRBs are ~2 times more common in the SMC when compared to the Milky Way and for luminosities down to ~1034 erg s-1. We explain this large number of SMC Be-XRBs as the result of both its low metallicity environment (~1/5 solar) and its high star-formation (SF) rate at the age of maximum formation of Be stars.

We present preliminary results from a study of the X-ray source population and the star formation history (SFH) of the nearby galaxy M81, based on archival Chandra data and our HST/ACS survey. These data provide the deepest and most detailed picture of the stellar populations in this prototypical spiral galaxy. The preliminary analysis of the ACS data shows variations of the SFH across the galaxy. The Chandra observations allow us to classify the X-ray sources and study their link with the SFH. In combination with the ACS data we can identify their optical counterparts and classify them, based on their photometric properties. We can classify 80% of the detected X-ray sources as OB stars, globular clusters, giant/supergiant stars, and background AGNs, demonstrating the diagnostic power of combining high spatial resolution optical and X-ray observations.

Cette étude porte sur l’évolution de la question de la parité linguistique dans quatre régions de la francophonie à partir des années 1970 : la France, le Québec, la Communauté française de Belgique et la Suisse romande. Elle examine le degré d’adaptation de la langue française aux conquêtes professionnelles et politiques du sexe féminin. Sont pris en considération les paramètres suivants :1. Les prises de position divergentes des linguistes. À la fin du XXe siècle deux sont les camps formés au sein des communautés francophones (notamment en Europe) : d’une part, les linguistes traditionnels prônent le caractère inaltérable d’une langue qui ne peut en conséquence devenir, en aucun cas, objet de revendications féministes ; d’autre part, les thèses des linguistes féministes qui mettent en valeur la dimension sociale de la question : à leur sens, la langue n’est pas neutre, mais constitue, au contraire, un vecteur privilégié de culture, d’idéologie.2. Les politiques en la matière mises en oeuvre par les pouvoirs publics dans les quatre pays de la francophonie considérés. Le Québec fut le premier à prendre des mesures en faveur de la féminisation linguistique ; suivent les autres pays, à partir des années 1990 notamment.3. La mise en application de la réforme linguistique dans le secteur administratif, dans le domaine de la lexicographie et des médias également. En ce qui concerne le secteur public, les enquêtes effectuées ont enregistré des résultats encourageants : utilisation des formes féminines des noms de métier, grade, fonction et titre dans les documents émanant des administrations ou des partis politiques. Presse et télévision ont largement contribué à la diffusion de la question en médiatisant le débat ; en adoptant également, dans la majorité des cas, les règles de la féminisation linguistique. La lexicographie, enfin, suit, bien que plus lentement, les évolutions dans ce domaine.

The description of coastal recession is a difficult asset that is characterized by highuncertainty. This uncertainty stems from the nature of the different factors that constitute the coastal systems. Physical features such as the different geological formations, the tectonic state of the coastal area and the sea level are all factors that complicate the efforts to describe the situation. In addition, any GIS software is lacking the tools to explain or map the uncertainty factors. Therefore, it is necessary to introduce a tool that may handle the natural factors in a GIS interface. In this paper we present an algorithm that works on a GIS interface and uses grid modelingtechniques. Taking into account factors such as the geology of the areas that are examined, the drainage system, the coastal type etc., the system applies a set of user defined empirical rules, to estimate the evolution of the recession process in the affected areas. For this paper we have tested the algorithm at the island of Samos (Eastern Aegean, Greece). In the last 20 years, huge problems of coastal erosion have been observed at the northeastern part of the island near the town of Karlovassi and at the southwestern part near the Castle of Pythagorion.The algorithm may prove to be of great assistance as a decision support tool for the municipalities in these areas, since the measures that have been taken so far are temporary and do not envision the future development of the coastline.

We discuss the results from the optical study of the X-ray sources detected in our Chandra survey of the central region of the Small Magellanic Cloud. Based on the OGLE-II and MCPS optical photometric catalogs we propose the most likely counterpart for 113 X-ray sources, 32 of which are identified with early type counterparts (of OB spectral type based on their position in color-magnitude diagrams). Optical spectroscopy of these counterparts with the 2dF spectrograph (AAT) reveals 13 new Be-XRBs in the SMC "bar". We estimate that these Be-XRBs have an age of 15-85 Myr, consistent with the typical age of Be stars. We also examine the "overabudance" of Be-XRBs in the SMC fields covered by Chandra, in comparison to the Milky Way, and we show that there is residual excess, even after accounting for the higher star formation rate of the SMC. This excess can be attributed to the lower metallicity of the SMC. Finally, we present a preliminary study of the parent stellar populations of these X-ray binaries based on deep IMACS observations. This work was supported by NASA LTSA grant NAG5-13056, and NASA grant G02-3117X.

The scope of the present research is to examine the spatial consequences of the predicted future sea-level rise upon the active area of the delta of the River Acheloos, which forms part of the NW coast of the Gulf of Patras (Ionian Sea). The growth of the Acheloos River deltaic plain, prior to the construction of dams and channelization of the lower part of the river, took place through the progradation of four main distributaries which transported 5-6 million tones of sediments annually.Following the construction of the dams, the hydraulic regime of Acheloos has changed and its propagation has ceased. The present investigation aims to quantify coastal changes on the deltaic plain of the Acheloos river due to the combined effect of (i) the process of inundation induced by a future sea level rise of 0.5 and 1 m and (ii) coastal erosion caused by the increased exposure to wave action due to sea-level rise and subsequent coastline retreat. The results of our analysis show severe shoreline recession (up to 1900m), extensive submergence of the active deltaic plain (~ 2586⋅103 m2 or 61.4 %) and elimination of most of the lagoonal areas. The substantial loss of deltaic land, accompanied by salinisation of the groundwater table, will cause severe damage to the agricultural economy of the area. Furthermore, we show that the consequences of a future sea-level rise on a low-relief fluviallydominated delta cannot be predicted accurately by simple conceptual models; instead, a holistic approach incorporating topographic, geomorphological, sedimentological, morphodynamic and hydrodynamic analyses is required.

We examine the intersubband transition dynamics of a single semiconductor quantum well when the ground and the first excited subbands are coupled by strong electromagnetic fields, with emphasis given to controlled intersubband population inversion. The system dynamics is described by the nonlinear density matrix equations that include the effects of electron‐electron interactions. We present analytical results for the electromagnetic field that can lead to high‐efficiency population inversion in the system. The validity of the analytical results is tested with numerical solutions of the density matrix equations for various values of the electron sheet density for a realistic GaAs/AlGaAs quantum well.

As evidenced by the development of tools that enable proper analysis of river systems, floodplain modeling is more important than ever before. Current legislative and socioeconomic aspects of integrated water resource management often require a hydraulic analysis prior to development or construction in a floodplain. To aid in accurate floodplain modeling, scientists use computer models in planning and analyzing floodplain hydraulic situations while having difficult modeling problems depending on data needs and data availability. On the one hand, floodplain models are successful in dealing with time variation, and models with hundreds or even thousands of time steps are common. On the other hand, spatial disaggregating of the study area has been relatively simple, assuming, in many cases, uniform spatial properties or allow for small numbers of spatial subunits within which properties are uniform. Geographical Information Systems (GIS) offer the potential to increase the degree of definition of spatial subunits, in number and in descriptive detail. This paper focuses in integrating GIS and floodplain modeling in order to produce fast, accurate and easy to understand, through thematic and animated maps, results, through the development of an integrated Decision Support System (DSS). The system was applied in Prasianos watershed, Rethimnon, Crete isl., to enable prediction of spatial runoff distribution, calculate flood hydrographs and simulate the flooding following an earthen dam breach.

The Karlovassi Basin is an area that has suffered many catastrophic events such as fires or floods within the last 10 years. These intense phenomena, that take place mostly at its northern part, along with the human activities, have significantly accelerated the evolution rate of the local landforms. The result is the noticeable alteration of the geomorphological landscape within these last ten years.When dealing with landscape evolution, the time is a basic factor since it determines the intensity of the morphologic development. For this paper we used an algorithm for the temporal analysis of the changes in the landscape, because of the erosional processes. The software that has been developed to apply the algorithm is GIS based and uses the concept of the cellular automata for the geospatial calculations. For each grid cell it calculates the altitude and soil thickness of the area, based on the continuity equation, which involves parameters of different natural processes such as the weathering of rocks, the river and slope sediment yield, etc. Since time is an important factor in this equation, each parameter is characterized as timeconstant or time dependent. The temporal variation of the physical process parameters is expressed by simple mathematical expressions, which may represent time constant values, as well as abrupt, smooth or periodical variations with time.This algorithm may support the local authorities in decision making issues, since it may identify the areas that require protection against the intense physical phenomena of the last years. Moreover, it may be useful in geomorphological and environmental research, concerning the way that some landforms evolve.

In the present paper we develop a software in order to describe, in quantitative terms, the time variation of the shape and dimensions of a landform. The software is based on an iterative cellular automata algorithm. In each step, the algorithm calculates the altitude and soil thickness of each cell, which represents a piece of land. The calculations are based on the continuity equation. Parameters which express the intensity of weathering of rock masses, soil transport along slopes and fluvial transport of sediments by rivers (physical processes parameters), are incorporated in the continuity equation, using empirical relations. These parameters may be time constant or time dependent. The physical meaning of a time dependent parameter is that the rate of a geomorphological process may change with time, as a result of human activities or changes in the climate. The temporal variation of the physical processes parameters are expressed by simple mathematical expressions, which may represent smooth, rapid or periodical changes.This software may be useful in geomorphological and environmental research, inorder to estimate the future development of a landform, as a result of physicalprocesses and human activities.

The Paros Island (Cyclades Islands, Aegean Sea, Greece) is characterized by a Mediterranean type of climate, while the Tihany Peninsula (Trans Danubian Middle Range Mountains, Lake Balaton, Hungary) is characterized by a Sub-Mediterranean type of climate. The Paros Island has abrupt rainfalls and lower temperatures during winters and long term sunshine accompanied by dry periods during the summer. The situation is similar in the Tihany Peninsula, except that there is snowfall in the winter and very intensive but short rainfalls in the summertime. These circumstances constitute a tough environment for the land. The low or sparse vegetation and steep slopes of the investigated areas leaves the ground exposed and very vulnerable to erosion. The recent change to the activities of the local people from agricultural to touristic ones and especially the abandonment of the agricultural terraces during the last 50 years has influenced the soil cover of the island, leading to total soil lossand exposure of the bedrock in many areas. The increase of tourist activities caused the same results however the agricultural activities have not ceased but increased a little. The slopes of the examined areas are high in general terms thus making soil regeneration almost impossible. The soil that is transferred is either moving towards the small alluvial plains of the island and inside the peninsula in Hungary. We try to compare the situation of the investigated Greek island and Hungarian peninsula bypointing out the areas that still appear to be in a high risk for erosion and to estimate the average amount of soil loss. For the later the Universal Soil Loss Equation (USLE) was tested on the data of the island. The application of the USLE took place with the use of MapInfo and ArcGIS Tools. We wish to give some details about the experiences of using the USLE model on these two territories.

In this paper we investigate the relations between the landforms and thediscontinuous tectonism. A multistep methodology has been adopted. Thus, first westudy the topography of a given area and by proper procedures we classify thegeoforms. We next examine the geological formations of the area, the drainagesystem, the landuse, the vegetation and the human impact.Finally, we study the tectonic zones of this area (faults and fractures zones). Datahas also been obtained by airphotos and satellite images. All the above information is analyzed in a G.I.S platform using expert system methodology. This procedure has been applied to some selected places of the Greek territory.

New BVRI CCD observations of the contact binary system HV~Aqr are presented. The new light curves are analyzed with the WD code and new geometric and photometric elements are derived. These elements are combined with the available spectroscopic data to yield the physical parameters of the system. The agreement between the spectroscopically and photometrically determined mass ratios of eclipsing binaries is also discussed.

We present the initial results from a deep HST survey of the nearby spiral galaxy M81 with the HST Advanced Camera for Surveys. The survey consists of B and V band observations of 29 ACS fields, totaling to 38 orbits. These observations, together with archival I-band ACS data, provide complete, deep coverage of the D25 area of the galaxy, down to 26-27 mag. This detection limit probes the bulk of early-type (O,B) stars and the population of star-clusters. The main goal of this survey is to characterize the X-ray source population of M81 in the context of its stellar populations and star-formation history. We discuss the analysis of the ACS data (mosaicing, astrometric registration, photometric analysis) and we present high quality images of the galaxy. We also discuss the initial results from the identification of optical counterparts to the X-ray sources detected in deep Chandra observations of M81, and the preliminary study of the stellar populations in individual fields of the galaxy. This work is supported by HST grant HST-GO-10584.01-A and NASA LTSA grant NAG-5-13056.

Observations of collimated outflows in young stellar objects indicate that several features of the jets can be understood by adopting the picture of a two-component outflow wherein a central stellar component around the jet axis is surrounded by an extended disk-wind. The precise contribution of each component may depend on the intrinsic physical properties of the YSO and also its evolutionary stage. In this context, we study a numerical model based on such a two-component outflow by using as an initial condition a combination of two prototypical models, each describing a meridionally self-similar and a radially self-similar exact solution of the steady-state, ideal hydromagnetic equations. These two classes of radially and meridionally self-similar solutions, have already been well studied and have been found to be related to the properties of disk- and stellar-wind, respectively. By properly mixing the two solutions, a variety of models is constructed with different contribution weights for each component in the initial set-up. The models are evolved in time by using the PLUTO code and the interaction and co-existence of the two components in the jet is investigated. It is found that a steady-state is always reached, independently of the mixing parameters of the two model ingredients. Moreover, the final outcome of the time evolution stays rather close to the initial analytical solutions. The results are compared and discussed along the lines of recent observational data.

Encouraged by the latest experimental developments as well as by the theoretical interest on the near‐field (NF) optics of semiconductor quantum dots (QDs), we present our most recent theoretical results on the NF optical absorption and photoluminescence (PL) of single and coupled III‐V QDs subjected additionally to an external magnetic field of variable orientation and magnitude. The zero‐magnetic‐field “structural” QD symmetry can be destroyed varying the magnetic field orientation. The asymmetry induced by the magnetic field ‐except for specific orientations along symmetry axes‐ can be uncovered in the near‐field but not in the far‐field spectra. Hence, we predict that NF magnetoabsorption experiments, of realistic spatial resolution, will be in the position to bring to light the QD symmetry.

The nuclear magnetic moment of the ground state of 57 Cu(I? = 3/2-, T1/2 = 196.3 ms) has been measured to be ?(57Cu) = (2.00 ± 0.05) ?N using the ?-NMR technique. Together with the known magnetic moment of the mirror partner 57Ni, the spin expectation value was extracted as ?? ?z? = -0.78 ± 0.13. Discrepancy between present results and shell model calculations in the full fp shell implies significant shell breaking at 56Ni with the neutron number N = 28. © EDP Sciences/Societe? Italiana di Fisica/Springer-Verlag 2007.

Intermediate-energy heavy-ion collisions can produce a spin polarization of the projectile-like species. Spin polarization has been observed for both nucleon removal and nucleon pickup processes. Qualitative agreement with measured spin polarization as a function of the momentum of the projectile-like fragment is found in a kinematical model that considers conservation of linear and angular momentum and assumes peripheral interactions between the fast projectile and target. Improvements to the kinematical model are discussed that aim to achieve quantitative agreement with spin polarization data from both the nucleon removal and pickup processes. © 2007 American Institute of Physics.

Sárvíz Valley is approximately 100km long, situated SW from capital of Hungary (Budapest). The total examined area of the valley is 60561.85ha. The soil cover is very mosaic, but the larger spots belong to Chernozems. We prepared the soil map of the valley, based on former soil maps, core samplings and aerial photographs. Based on the soil map we prepared the erosion map on the territory of the Sárvíz Valley Small Region Association. Erosion modeling was done by the USLE (Universal Soil Loss Equation) model. We marked areas where different amount of special attention and soil protection measures are needed. One of the basic aims of this study is the application of soil mapping and modeling for the calculation of erosion. With the help of these tools we are able to outline the areas which, as far as erosion is concerned, are in need of protection, as well as the less useful areas for agricultural production.

In the following essay we are going to analyse therelationship between sound and image in computermusic. We will be examining sound visualisationsoftware, and its evolution over the thirty-five yeartimespan in which it has existed. How we judge software,is based on aesthetic criteria, the way they were handeddown to us from theories of abstract painting (20thcentury avant-garde) , the theory of montage by SergeiEisenstein, of neurophysiology (synesthesia, muscularimages) and of the successful correspondence of thetwo media (pixel and music) in the works and theoryof James Whitney.

We introduce an efficient method for slowing and stopping/storing light, which is based on wave propagation along a slowly axially varying, adiabatically tapered, negative refractive index metamaterial heterostructure. We analytically show that the present method can, in principle, simultaneously allow for broad bandwidth operation (since it does not rely on group index resonances), large delay-bandwidth products (since a wave packet can be completely stopped and buffered indefinitely) and high, almost 100%, in/out-coupling efficiencies. Moreover, by nature, the presented scheme invokes solid-state materials and, as such, is not subject to low-temperature or atomic coherence limitations. This method for trapping photons conceivably opens the way to a multitude of hybrid, optoelectronic devices to be used in 'quantum information' processing, communication networks and signal processors, and may herald a new realm of combined metamaterials and slow light research.

We analytically demonstrate that a lightwave propagating along an adiabatically tapered waveguide with a core of negative refractive index (NRI) material can efficiently be brought to a complete standstill, while allowing for more than 90% in-coupling from an ordinary dielectric waveguide. © 2007 Optical Society of America.

Paros Island is part of the complex of Cyclades Islands, situated in the central Aegean Sea, Greece. It is characterized by the Mediterranean type of climate, with abrupt rainfalls and lower temperatures during winters and long term sunshine accompanied by dry periods during the summer, which constitutes a tough environment for the land. The low vegetation of the island leaves the ground exposed and very vulnerable to erosion. Also the recent change to the activities of the local people from agricultural to touristic ones and especially the abandonment of the agricultural terraces during the last 50 years has influenced the soil cover of the island in an unfavorable way, leading to total soil loss and exposure of the bedrock in many areas. Aggravating this fact, the slopes of the island are high in general terms thus making soil regeneration almost impossible. The soil that is transferred is either moving towards the small alluvial plains or, in most cases, is lost directly to the sea. In this paper there is an effort to depict the situation that currently exists on the island by pointing out the areas that still appear to be in a high risk for erosion and to estimate the average amount of soil loss. For the later the Universal Soil Loss Equation (USLE) was tested on the data of the island. The application of the USLE took place with the use of MapInfo and ArcGIS Tools.

In parallel to the development of numerical simulations, analytical solutions for modelling the acceleration and the collimation of winds and jets have been proposed. We present here how meridionally self-similar solutions can be used to model the solar wind using Ulysses data at solar minimum. Such solutions may also be adapted to explain the formation core or spine jets in classical and weak TTauri stars (class II and III young stellar jets) as well as relativistic jet cores from AGN. The criterion for collimation explains how the jet evolves towards a wind as the star approaches the main sequence. A similar scenario could explain the winds from Seyfert galaxies by opposition to the powerful jets from Fanaroff Riley sources.

In parallel to the development of numerical simulations, analytical solutions for modelling the acceleration and the collimation of winds and jets have been proposed. We present here how meridionally self-similar solutions can be used to model the solar wind using Ulysses data at solar minimum. Such solutions may also be adapted to explain the formation core or spine jets in classical and weak TTauri stars (class II and III young stellar jets) as well as relativistic jet cores from AGN. The criterion for collimation explains how the jet evolves towards a wind as the star approaches the main sequence. A similar scenario could explain the winds from Seyfert galaxies by opposition to the powerful jets from Fanaroff Riley sources.

Patsantaras, N.; Kamperidou, I.; Panagiotopoulos, P. (2007). “Social Inclusion or Xenophobia?" Presentation at the 13th IASL Congress Sports Justice, Present and Future, Mexico City, November 13 - 16, 2007. Organised by the International Association of Sports Law (I.A.S.L.), the Comision de Juventud Y Deporte, Senado de la Republica, Estados unidos Mexicanos. DOI: 10.13140/RG.2.1.4661.6806    ----------------------------------------------------------------------------------------------ABSTRACT:    Developments in new technologies of mass communication have created unprecedented global audiences for ‘mega’ sports events. The positive social impact of these events, such as the social construction and redefinition of identity based on ethnic, racial and gender equity and equality has been overestimated. The alarming impact of globalization on racism and xenophobia has generated international discourse concerning the mainstreaming of cross-cultural understanding and dialogue, especially through sports. Contemporary critical theories have distinguished sport as a site through which non-inclusive practices of social exclusion, such racism and violence, can be identified. As an international expression, is sport a means to social inclusion and integration, or a social-conflict space closely linked to social inequality? A structural functional approach directs attention to the ways sports help society operate. However, a social-conflict analysis focuses on the inequalities in sports. Olympic sports were institutionalized as a social space with no boundaries, encompassing in their value system, respect for cultural and ethnic identities. The Olympic movement advocates ethnic self-definition and the peaceful coexistence of ethnic diversity in the international scene. However, the exploitation, or rather misuse of athletic activity has always been common practice in the history of the athletic phenomenon. Current discussions characterize sports as a means that serves the globalization process, namely the western model of cultural-societal globalization. What role can Olympic sports play today to preserve and safeguard cultural and ethnic diversity, namely to promote the empowerment of self-definition, multiethnic understanding, respect for ethnic identity and cross-cultural cooperation? Key words: sport as a cultural ‘topos’, broader identities, respect for ethnic, racial and gender diversity, racism and xenophobia, non-inclusive practices of social exclusion, racial inclusion, sport identity, the gendered body, cultural diversity vs. ‘difference’, multi-dimensional and proactive strategies. 

Μια συχνή καλλιτεχνική δραστηριότητα των Ελλήνων στην Αμερική στα τέλη του 19ου αι. ήταν να απαγγέλλουν αρχαία ποιητικά κείμενα, ντυμένοι με χλαμύδες και με τη συνοδεία άρπας. Παράλληλα δρούσαν και οι περιοδεύοντες «τραγικοί ραψωδοί», όπου επιδίδονταν συχνά σε αυτή τη συνήθεια. Ήδη από τα τέλη του 19ου αι. γεννήθηκαν οι πρώτοι ερασιτεχνικοί θίασοι με μόνιμη, σταθερή παρουσία και πολυετή διάρκεια ζωής. Πολλοί από τους ηθοποιούς αυτών των ερασιτεχνικών σκηνών εργάστηκαν για το ελληνοαμερικανικό θέατρο πάνω από είκοσι χρόνια δίνοντας παραστάσεις αδιαλείπτως. Ημερομηνία σταθμός είναι η 25η Μαρτίου του 1895, όπου πραγματοποιήθηκε πραγματοποιείται η πρώτη παράσταση Ελλήνων μεταναστών στις Η.Π.Α. Ο σύλλογος «Λυκούργος» στο Chicago ανέβασε την κωμωδία του Δημητρίου Βυζάντιου «Βαβυλωνία» με ερασιτέχνες ηθοποιούς οι οποίοι διέμεναν στην πόλη. Τα έσοδα την παράστασης προορίζονταν για την κάλυψη των εξόδων του εορτασμού της Εθνικής Εορτής. Αυτή η πρωτοφανής παράσταση πυροδότησε το φαινόμενο του ελληνικού μεταναστευτικού θεάτρου στις Η.Π.Α.

The optical properties of ultra thin anodic silicon layers containing silicon nanocrystals were investigated by photoluminescence spectroscopy and Fourier transform infrared absorption spectroscopy. The films were grown by electrochemical dissolution of bulk crystalline silicon at the early stages of anodization using short monopulses of anodic currents ranging from the regime of porous silicon formation to the transition regime between porosification and electropolishing. The conditions for obtaining light emitting films and the origin of light emission will be discussed. © 2007 American Institute of Physics.

We review our results on the structural and light-emitting properties of ultra-thin anodic silicon films grown by the electrochemical dissolution of bulk monocrystalline silicon at early stages of anodization. The films were grown using monopulses of anodization current covering the range from the regime of porous silicon formation to electropolishing. The samples were characterized by high resolution transmission electron microscopy, Fourier transform infrared absorption spectroscopy and photoluminescence.

Recent observations of jets in young stellar objects suggest that although both disk- and stellar-outflows seem to be present, each one of these two components may dominate at the various stages of the YSO. Over the past several years the only analytical solutions of the steady-state MHD equations which have been studied, correspond to the radially (magneto-centrifugally driven disk winds) and meridionally (thermally accelerated stellar outflows) self-similar models. In this context, we study through time dependent numerical simulations, using the PLUTO code, one prototypical case of each of these two classes examining many of their physical and numerical properties. We find that the solutions are structurally stable and robust, maintaining all their well defined features, despite several modifications they have been subject to. Therefore, their proper matching could explain a two-component jet.

Cyprus is experiencing negative impacts from flooding due to rainstorms in its urbanenvironment. There are no official figures on the extent of urban flood damage.However, the information from insurance companies is that, although Cyprus lies in a seismic region and its climate is semi-arid, the extent of the urban flood damage ismore than the extent of earthquake damage. Main causes of such damages are thelack of storm water drainage systems, the disruption of pre-existing naturalwatercourses by urbanisation, the blockage of man-made watercourses, the everchanging land use. The main effects/ impacts of these damages are the flooding of basements and low lying floors, where could me caused damages to parked cars, central heating systems, stored goods. Some consequential damage is the loss of productive time, loss of guarantees/ warranties of electrical/ mechanical equipment.This paper presents an institutional analysis, highlighting the gaps in planning,implementation, maintenance of urban flood management systems. It includes a case study of flooding caused due to institutional gaps and proposes measures to reduce the risk of urban flood damage.

We present the design of two continuous tunable CW coaxial cavity gyrotron oscillators, one of 330 GHz - 200 W with a bandwidth of 3 GHz for scientific applications and one of 30 GHz-150 kW with a bandwidth 0.4 GHz for industrial applications. The tuning of both gyrotrons is achieved by moving the tapered inner conductor in the axial direction and by adjusting the operating magnetic field.

We present the first results from a study of the X-ray source populations in M81 in the context of their local star-formation histories. We use deep Chandra observations and our multi-band HST maps of M81 in order to detect and classify the X-ray sources, based on their X-ray and optical properties. We compare the different X-ray source populations (Luminosity functions and relative numbers of different source types) for the different regions of the galaxy and for stellar populations in different age ranges (derived from the HST data). This way we can identify High-mass X-ray binaries with Main Sequence and supergiant donors, and we find that their luminosity functions are distinctly different. We also construct the luminosity functions of the X-ray sources associated with globular clusters. Finally we present our results from the spatially resolved star-formation history of M81, based on the study of the color-magnitude diagrams in different regions of the galaxy. We discuss these results in the context of similar studies of star-forming galaxies spanning a wide range of starburst ages.

The evolution of landscapes as natural phenomena is rarely seen in a generation,but in volcanic regions the landscape is transformed at a tremendously fast rate.These places are physical bounded and marked by natural phenomena as well asimbued with cultural meaning. In regions where volcanic activity is dormant, it isargued that a different cultural association is formed; in this paper thepalaeoenvironmental and volcanic evolution of the sites are analysed in thevolcanically active Mývatn region (NE Iceland) and on the island of Thera (AegeanSea, Greece).The island of Thera consists of a basement of recrystallized limestones andmetamorphosed rocks. This basement is covered by a sequence of volcanicformations. The volcanic activity, which started about 1.6 million years ago, isstill active and it is the predominant natural feature of the island’s topography.The Mývatn region is a volcanically active area, straddling the American andEuropean plates along the North Atlantic ridge. The most recent lava eruptiontook place in the 1983 and land areas are constantly changing in response to newactivities. Few of the questions that the research will approach are:

• In what way have volcanoes evolved during the last millenniums and what dramatic changes have they brought to Natural resources?
• To which extent is an active long-term natural disaster a constant threat for human presence? How is human – nature balance attained?
• Is cultural meaning projected on such a natural landmark? Which aspects of human life are directly influenced (e.g. settlement patterns, land boundaries, resources and economic activities) and which aspects are more implicitly affected (e.g. mental images, religious perspective, spiritual perceptions)?

The first VRI CCD photometric observations of the newly discovered ROTSE-1 eclipsing variable GSC 2534:1121 are presented. Our new times of minima are used along with those of the last two years to calculate a new ephemeris of the system. The observed light curves are analyzed with the Wilson-Devinney program in order to derive the geometric and photometric elements of the system. The moderate O'Connell effect is explained by assuming a cool spot on the primary component.

AGN jets are collimated, relativistic flows that emanate from accretion disks around supermassive black holes. Electromagnetic stresses are the most plausible candidate for extracting energy at the source and converting it into outflow kinetic energy. Among the questions that need to be answered in order for these processes to be well understood are: How the conditions near the disk are related to the terminal Lorentz factor of the jet? What is the asymptotic value of the Poynting-to-matter energy flux ratio? Can we explain the apparent kinematics of the observed jet components? I present exact solutions as well as a general analysis of the ideal magnetohydrodynamic equations that help to shed light on these questions.

The post-Alpine sedimentation history in Greece is mainly characterized by thedevelopment of terrestrial, marine and lacustrine successions. During the UpperMiocene salinity crisis marine evaporites, mainly gypsum, were formed in severalbasins across Greece (i.e. Ionian Islands, Crete Island). These evaporites present simple mineralogy and they are almost insoluble. As a result, they appeared to be quite resistant in weathering process and they are easily identified in the field.On the contrary, Upper Miocene evaporites of lacustrine origin have a morecomplicated mineralogy and they are rare in field outcrops in a worldwide scale, since they are commonly easily weathered. Even though, the adjacent to Aegean Sea, Western Anatolia volcanic terrain hosts a series of lacustrine evaporites, the only similar deposit in Greece is that of Karlovassi Basin, in Samos Island.The aim of the present paper is to study the erosion risk of the Upper Mioceneevaporate - bearing formations of Karlovassi basin developing a GIS model based on Boolean logic. Some of the affecting parameters that were input into the model are: the vulnerability of the lithological formations, the run off model, the morphological slopes and the aspect, the tectonic discontinuities, the land use – land cover of the wider area and the man made intervention. The geographical distribution of the aforementioned parameters, along with their modelisation, resulted to an erosion risk map of the Karlovassi basin.

During the last years the major threat for the deforested areas of the Crete island,especially the area of Moussouron municipality, is the quick wash out of soil material. The wash out of soil material, due to logging activities or fire events, obstracts efforts for reforestation and natural reconstruction of the site. For the needs of our research, the field experiments were applied at a high slope area situated at Moussouron municipality (Crete island - South Greece), where majorfire events recently took place and caused serious damages at the vegetation. Inspecific, neighboring areas of approximately 2.6km2 and 3.2km2 have been burnt in2003 and 2004, respectively. This case study area is mainly characterized by the Mediterranean climate, having extended dry periods during summer (5% of total rainfall) and periods with intensive rainfall during winter (95% of total rainfall). The area presents high relief alterations with intense slopes (~65% of the area has slopes over 20 degrees) and lithologically is mainly characterized by two basic formations; carbonate rocks at higher and schists at the lower altitudes. The aforementioned characteristics have caused the soil to intensively wash out just after the fires occurred. The main purpose of this research is to evaluate the correspondence between the amount of eroded material and the rain intensity, at conditions of recently burnt areas. In order to approach the problem, tree trunks in a parallel to the contour lines arrangement, were installed. This way the study area was split in numerous plots with predefined dimensions and precisely measured slopes. Just after each intense rainfall, thickness measurements of accumulated material were performed at each one of the tree trunks, while the runoff material was also estimated at the lowest parts of each plot. Αt the same time, using a rain gauge, rain intensity was also measured, in order to correlate this factor to the overall soilwashout. The research, performed within a period of 20 months with a total of 18 intense rain events, concludes to the rates of denudation and soil washout at non protected deforested areas and at the same time at areas were tree trunks were put as a prevention method. Particular preservation strategies and research methodologies adjusted to the needs of specific areas, may indeed act in favour of natural resources and retain ecological balance.

Patsantaras, N., Tsopani, D., Dallas, G., Kamberidou, I., & Mitsi, T. (2006). "Gender Issues in Rhythmic Gymnastics".  In proceedings of the Convegno Internazionale Ginnastica Ritmica CSAM: Identita e propelmatiche di questo sport, (1st international Rhythmic Gymnastics Congress), 6-7 April 2006, Torino Italy. DOI: 10.13140/RG.2.1.3940.0164   --------------------------------------------------------------------------------------------ABSTRACT:  Rhythmic Gymnastics (RG) is exclusively a woman’s sport, in other words, men are explicitly excluded access.  However, the characteristically ‘female-dominated nature’ of this sport (RG) is not without cause. The sport has been formulated according to predominating and prevailing social views and social values, including gender stereotyping, and thus is considered inappropriate and unacceptable for the ‘masculine’ nature or image of ‘masculinity’, including the male body aesthetic.  On the contrary, it is considered the ideal means for the construction, the structure, the constitution and the expression of ‘femaleness’,  ‘femininity’, and ‘womanhood’, as defined when this sport emerged. Today, although women are not denied access to sports, men are excluded. Namely, they are denied access to rhythmic gymnastics on the competition level. Discrimination, due to biological gender, is an element of social exclusion and social elimination that is actively present—a factor that is inconsistent with prevailing social and sport values, such as gender equality and gender equity. The purpose of this study is to convey and examine the current gender views of rhythmic gymnasts, judges, trainers, members of the technical committees, the audience and journalists, regarding the potential or imminent entrance of men in this sport (RG).  Methodology: two hundred and ninety-nine (299) participants— rhythmic gymnasts, trainers, judges, journalists, members of the technical committee, parents and spectators (audience)— responded to a closed questionnaire. The statistical evaluation of the data was prepared with the SPSS v. 13 statistical package-program. Results:  In all the above-mentioned categories, the majority supports the entrance and participation of men in the sport of Rhythmic Gymnastics. A small differentiation is displayed in the responses concerning the proposed competition programs, whereas enormous and conflicting differences of opinion are indicated, concerning probable-imminent higher ratings due to the entrance and participation of men in the sport.  The trainers, the judges, the rhythmic gymnasts, the administrative and technical members favor the participation of men in RG., in contrast to the parents, the audience and the journalists. Conclusions: The results of this study indicate that the gender issue concerning men’s access to RG must be examined, unreservedly by the members of the International Federation of Gymnasts. Today, social exclusions and social elimination based on biological gender, as observed in sports and sports competitions, are outdated and anachronistic, not only in relation to wider-broader social values, but also to the value system of sports. Key words: ‘female-dominated’ sport, gender stereotyping, the male body aesthetic, men’s access/inclusion in RG.

We present self-similar semi-analytical solutions obtained in the framework of general relativistic magnetohydrodynamics (GRMHD) which describe steady and axisymmetric outflows from the system of a hot coronal magnetosphere of a Schwarzschild black hole and its surrounding accretion disk. The model allows to extend previous non relativistic MHD studies for coronal winds from young stars to spine jets from Active Galactic Nuclei surrounded by disk-driven outflows, The collimation depends critically on an energetic integral measuring the efficiency of the magnetic rotator, similarly to the non relativistic case. The outflows are thermally driven and magnetically (thermally) collimated if the magnetic rotator is efficient (inefficient). It is also shown that relativistic effects affect quantitatively the depth of the gravitational well and the coronal temperature distribution in the launching region of the outflow. Similarly to previous analytical and numerical studies, relativistic effects tend to increase the efficiency of the thermal driving but reduce the effect of magnetic self-collimation.

We present self-similar semi-analytical solutions obtained in the framework of general relativistic magnetohydrodynamics (GRMHD) which describe steady and axisymmetric outflows from the system of a hot coronal magnetosphere of a Schwarzschild black hole and its surrounding accretion disk. The model allows to extend previous non relativistic MHD studies for coronal winds from young stars to spine jets from Active Galactic Nuclei surrounded by disk-driven outflows, The collimation depends critically on an energetic integral measuring the efficiency of the magnetic rotator, similarly to the non relativistic case. The outflows are thermally driven and magnetically (thermally) collimated if the magnetic rotator is efficient (inefficient). It is also shown that relativistic effects affect quantitatively the depth of the gravitational well and the coronal temperature distribution in the launching region of the outflow. Similarly to previous analytical and numerical studies, relativistic effects tend to increase the efficiency of the thermal driving but reduce the effect of magnetic self-collimation.

During recent observations it was possible to increase the field of view for the Cassegrain telescope at the Kryoneri Astronomical Station of the National Observatory of Athens. The very small area of sky observable with the existing CCD, is a problem when larger fields need to be observed. A focal reducer was installed on the telescope thus increasing the observed area by a factor of about 4. The advantage is faster photometry and detection of very faint stars (>20 mag). A permanent focal reducer should be mounted on the telescope for the benefit of all observers.

Jets in active galactic nuclei are collimated, relativistic flows that emanate from accretion disks around supermassive black holes. Electromagnetic stresses are the most plausible candidate for extracting energy at the source and converting it into outflow kinetic energy. Questions that need to be answered in order for these processes to be well understood are: Can we explain parsec-scale accelerations that the observations infer? How the conditions near the disk are related to the terminal Lorentz factor of the jet and what is the asymptotic value of the Poynting-to-matter energy flux ratio? Can we model the apparent kinematics of the observed jet components? I present solutions of the ideal magnetohydrodynamic equations that help to shed light on these questions.

Jets in active galactic nuclei are collimated, relativistic flows that emanate from accretion disks around supermassive black holes. Electromagnetic stresses are the most plausible candidate for extracting energy at the source and converting it into outflow kinetic energy. Questions that need to be answered in order for these processes to be well understood are: Can we explain parsec-scale accelerations that the observations infer? How the conditions near the disk are related to the terminal Lorentz factor of the jet and what is the asymptotic value of the Poynting-to-matter energy flux ratio? Can we model the apparent kinematics of the observed jet components? I present solutions of the ideal magnetohydrodynamic equations that help to shed light on these questions.

Development of accurate and efficient models on erosion risk mapping are difficult to be applied on different environmental parameters, mainly due to the complexity of the integrated parameters. In this study the developed GIS model is based on the theory of Boolean logic. The rules integrate the main parameters for erosion, e.g. vulnerability, slope, drainage density, although it is easy for more parameters to be added. As case study area Penteli mountain (North-East Attiki) was selected, that suffers from intense erosion, mainly due to the last severe fire events. With the aim of restraining erosional processes, combinatory strategies, such as assignment of tree trunks parallel to contours, have been applied. The results of this study include a model for erosion, deposition and material transfer. Complementary, a GIS based model was developed so as to define the movement of eroded material within the different drainage basins of the area. The model defines the erosional and depositional sites and the results are confirmed by the measurements on the tree trunks.

We report on the results of a series of photometric observations of the low-amplitude δ Scuti star GSC 4778:0324, in the course of a multi-site campaign aiming at monitoring V1162 Ori. The two dominant frequencies, found in the previous analyses based on the 2000-2002 data, are confirmed and their amplitudes are found to be stable on a time-scale of a few years.

The first complete CCD light curves of the eclipsing binary systems AX Virginis and V1034 Cygni have been obtained in the B, V, R, I and V, R, I filters, respectively, during the spring and summer of 2004 with the 40-cm telescope of the University of Athens Observatory. The light curves were analyzed with the W-D program in order to determine the geometrical and physical parameters of the systems.

Tsopani, D., Dallas, G., Patsantaras, N., Kamberidou, I., Tinto, A., & Louka, A. (2006). "Physical Appearance in Rhythmic Gymnastics: code of point and current perceptions". Announcement in Proceedings of the Convegno Internazionale Ginnastia Ritmica: Identita e propelmatiche di questo sport, (1st international Rhythmic Gymnastics Congress), 6-7 April 2006, Torino Italy.  DOI: 10.13140/RG.2.1.1482.4161  Physical Appearance in Rhythmic Gymnastics, April 2006, Torino Italy.pdf     [K.6 in Apella]

There is a wide range of alternative approaches to study erosion processes. In this paper the construction of a model based in the interaction of Geographical Information System (GIS) and Artificial Neural Networks (ANN) is described. The neural model uses supervised competitive learning process. The whole procedure starts with the digitization of the data and the definition of the input variables: such as slope form and gradient, lithology and vegetation - landuse. The neural modeltransforms the input variables into the erosion risk output variable. Thus, the last stage regarded the creation of an erosion risk zones map. For case study was chosen the island of Corfu (Greece). The island consists of lithologies very vulnerable to erosion and receives considerable amounts of rainfall, especially if compared to the rest of the Greek territory. Finally, the whole model was tested and the proper function of the model was confirmed by field data observations.

AGN are associated with relativistic winds and jets. We discuss the application of meridionally self-similar models to winds and jets from hot relativistic coronae, in particular in the central region of accretion disks. We try to understand the respective role of the disk and the central super massive black hole in the source of the jet as well as the classification of those jets. If the orientation of the jet respectively to the observer is one of the key to understand the standard classification, another parameter is the energy distribution of the magnetic rotator which efficiency should increase between jets from Seyferts and jets from Fanaroff Riley (FR) objects. Moreover the thermal confinement in FRI jets may turn out to be more important than in the magnetically confined FRII jets whose environment is clearly poorer. This scenario deduced from analytical modeling needs further investigation trough numerical simulations.

AGN are associated with relativistic winds and jets. We discuss the application of meridionally self-similar models to winds and jets from hot relativistic coronae, in particular in the central region of accretion disks. We try to understand the respective role of the disk and the central super massive black hole in the source of the jet as well as the classification of those jets. If the orientation of the jet respectively to the observer is one of the key to understand the standard classification, another parameter is the energy distribution of the magnetic rotator which efficiency should increase between jets from Seyferts and jets from Fanaroff Riley (FR) objects. Moreover the thermal confinement in FRI jets may turn out to be more important than in the magnetically confined FRII jets whose environment is clearly poorer. This scenario deduced from analytical modeling needs further investigation trough numerical simulations.

Kamberidou, I., & Patsantaras, N. (2006). "Social Capital and Gender Equity in Sports". Presentation at the International Conference on Social Capital and Sport Governance in Europe: Trust and the Use of Social Ties, 4-5/12/2006, Universitat. International Conference on Social Capital and Sport Governance in Europe: Trust and the Use of Social Ties, 4-5/12/2006, Milano, Italy. DOI: 10.13140/RG.2.1.3468.4642  K.3 in Apella ***Conference organized by the Universitat Commerciale Luigi Bocconi and IPAS-Institute of Public Administration and Health. Universitat Commerciale Luigi Bocconi and IPAS-Institute of Public Administration and Health Care Management ‘Carlo Masini’ in collaboration with the European Commission, Milano Italy.

Presented by Irene Kamberidou  5/12/2006:Patsantaras, N., & Kamberidou, I. (2006). "Social Capital Dimensions and Civil Society: Inclusive vs. Exclusionary Social Capital in Sport Governance". Presentation at the international conference “Social Capital and Sport Governance in Europe: Trust and the Use of Social Ties”,4-5/12/2006, organized by the Universitat Commerciale Luigi Bocconi and IPAS-Institute of Public Administration and Health. Universitat Commerciale Luigi Bocconi and IPAS-Institute of Public Administration and Health Care Management ‘Carlo Masini’ in collaboration with the European Commission, Milano Italy.  DOI: 10.13140/RG.2.1.2700.4644 [ K.5 in Apella  and  K.5.1 in Apella ]

Kamberidou, I. (2006). "The Social Gender and Sport Identity- SOCIO-CULTURAL GLOBALIZATION: a bio-socio-cultural interpretation". Presentation at the XIth International CESH Congress, Sport and the Construction of Identities. Session 18: National Comparisons and Globalisation, Sept. 18, 2006. 17-20 September 2006 ,Vienna Austria.  CESH Congress Sport and the Construction of Identities, Vienna. Organized by the European Committee for Sports History (CESH) . sport_identity-powerpoint_22.11.2006.ppt  K4 in Apella    

The first BVRI CCD photometric observations of PY Lyrae were obtained at the Kryoneri Observatory in the summer of 2004. Five new times of minima and a new ephemeris were calculated. The light curves were analyzed with the Wilson-Devinney program, in order to derive the geometric and photometric elements of the system. A spot model was assumed in order to explain the pronounced O'Connell effect.

We show that, with judicious choice of opto-geometrical parameters, oscillatory waves guided by generalized left-handed slab waveguides can attain zero group velocity. Advantages compared to previous methods of slowing or stopping light are concisely discussed. © 2006 Optical Society of America.

Tsopani, D., Patsantaras, N., Dallas, G., & Kamberidou, I. (2006). "Stuctural Trends and Prospects of Male Participation in Rhythmic Gymnastics". Proceedings of the 1st International Congress in Rhythmic Gymnastics, Convegno Internazionale Ginnastica Ritmica CSAM, Torino Italy, 6-7 April, pp. 35–39. DOI: 10.13140/RG.2.1.4529.8405   K.8 in Apella

The aim at this paper is to study the historical allouviation of the area ofThessaloniki using mainly archeological data. Such data has been found in manyplaces in this area. These findings (buildings, castles, road traces, fortifications) dateback from Neolithic up to Ottoman period. We have approached this problem bystudying the geomorphologic processes of this area and by mapping in detail theallouviation of the ancient monuments. A spatial database has been created attributing geological, geomorphological, hydrological, other environmental and archaeological data along with all the measurements undertaken during fieldwork. Apart from contemporary data, older topographical maps of the area have also been input and analysed in the GIS together with the rest datasets. A specific methodology was applied in view of recording and studying the erosion-deposition rates. The derivative results have indicated that deposition rates vary within diverse temporal and spatial conditions. This is due to the topography, the lithology and the climate changes of this area. The study, also, reported that in some places vertical depositions rates at about 0, 5 cm/year. The applied model tracing erosional processes and deposition rates can be implemented in any other location irrespective of the environmental, spatial, or archaeological data characterizing the area.

We present a test-study of the ``seeing'' at the Kryonerion Station of the National Observatory of Athens. We used a Differential Image Motion Monitor (DIMM) during July and October 2002 and found a median ``seeing'' of 0.68 arcseconds and 1.42 arcseconds, respectively. We also compared the technique against the Hartmann-version of the ESO-type DIMM method and found similar results within 0.05 arcseconds. For some reason, which is under investigation by international teams, the measurements of our ESO-type DIMM are underestimated by ~ 10% compared to ESO-standard DIMM measurements. Simultaneous ESO-type DIMM measurements and standard gauss-fitting-technique measurements, taken with the Kryonerion 1.2m telescope (inside the dome) indicate that the ``seeing'', as measured by the telescope is by 1 arcsecond larger. The above tests were performed in order to calibrate, test and make a brief sampling of the ``seeing'' at the Kryonerion Station with the aim to move eventually the equipment to the Emilios Harlaftis Astronomical Station the site of the new 2.3m ARISTARCHOS telescope - for a long-term ``seeing'' monitoring. As a by-product of this project, a new DIMM Station became operational at Mt. Holomon, in the premises of the University of Thessaloniki, in 2004.

The creation of “the bodiless society”– a gender-neutral society of services that is gradually replacing industrial society– is the result of accelerated technological developments in combination with the globalization of the economy. The products of this technological revolution are in reality services, a factor that has foundational consequences on society. The creation of thousands of specialized employment positions in the distribution and use of new technologies, whose hard nucleus is made up of specific knowledge and technological know-how is currently denied to the less-privileged gender subjects, the citizens who have particular difficulties in adapting and comprehending this transitional stage of the postmodernist period. Will our future society be a globalized technological ‘paradise’ of an abundance of information, products and services, achieved through the marginalization of the vulnerable gender subject, specifically that of non-mainstream social groups, and women in particular? The paper argues that policy measures at EU level, are needed to maintain a high level of gender-inclusion in the Information Society. In this context, the EU is examining the present state of affairs – mainstreaming and promoting equality — working towards establishing an action plan for a better integration of women and non-mainstream social groups in the Information Society. The crucial issue of equality in Information Society must be dealt with and confronted, not only as a question of how to increase the number of consumers or the production of goods and services, but rather as an opportunity for all citizens to become active agents or active members in society, regardless of gender, race, colour, religion, etc. To fight digital illiteracy and future social exclusions the paper suggests three areas of action: Firstly, educational reforms, notably, the institutionalization of mandatory ‘techno-education’: compulsory technological training as an integral part of the curricula of EU public schools, beginning from kindergarten and extending to vocational training. Secondly, international, inter-cultural interdisciplinary research must be progressively and systematically promoted. The new realities of a technological society must be clearly defined and described through interdisciplinary collaborations. We need to look into the present state of affairs before working towards establishing strategies and an action plan for the better integration of women and other vulnerable groups into Information Society. And thirdly, a techno-ethical code to ensure that Europe’s achievements in past are transposed into the Information Society and the virtual environment. Keywords: “the bodiless society”, digital illiteracy and technophobia, gender-inclusion in the Information Society, action plan, a techno-ethical code (technoethos)

Kernel discriminants are greatly appreciated because 1) they may express nonlinear boundaries between classes and 2) they permit to visualize graphically the data points belonging to di®erent classes. One such method is called GDA (Generalized Discriminant Analysis), however it operates on a kernel matrix of size NxN and is for large N prohibitive. We illustrate how this method works in a real situation when dealing with relatively large data. We consider a set of predictors of erosion risk in the Kefallinia island categorized into 5 classes of erosion risk (together N=3422 data items). We argue that a proper preparation of appropriate learning samples can greatly speed up the evaluations and result in good generalization properties. Our concern is to ¯nd appropriate data for learning. This is done by a kind of sieve algorithm.

Using 24 overlapping XMM-Newton observations of the Local Group spiral galaxy M 33, we have detected 447 sources in each individual pointing and in deep combined images. A total of 61 sources exhibit significant flux variations by a factor of up to 144, on time scales of hours to months or years. The detected variability, together with the hardness ratio (HR) method and optical identification (when available), is used to classify the sources as X-ray binaries (XRBs), supernova remnants (SNRs) and super-soft sources (SSS) in M 33, as well as background AGN and foreground stars in the field of view. The majority of sources can only be classified as ‘hard’, according to their HRs. We find that the luminosity distribution of the detected SNRs and SNR candidates in M 33 is similar to M 31, and slightly steeper than that of the LMC.

As shown in our first poster, in a recent survey of M33 with XMM-Newton we detected the X-ray source population of this nearby spiral galaxy down to the (0.2-4.5) keV luminosity of 1035 erg s-1, a factor of 10 deeper than in previous observations. The majority of the detected sources was classified using, in many cases, only their X-ray properties. In particular, 8 new X-ray binary (XRB) candidates were selected, based on their long-term X-ray light curves. We also classified supernova remnants (SNRs), super-soft sources (SSS), AGN, foreground stars and a population of ‘hard’ sources using the hardness ratio (HR) method. A detailed spectral and timing analysis of the brightest sources is in progress. We present a few examples of spectra for particular source classes. We find that bright ‘hard’ sources can be divided into two broad families: one best modelled by a powerlaw with photon index in the range of 1.0-2.0, and the other displaying disk blackbody spectra with kT of 0.8 to 1.5 keV.

PDAs and other handheld devices are commonly used for processing private or otherwise secret information. Their increased usage along with their networking capabilities raises security considerations for the protection of the sensitive information they contain and their communications.

In this paper we attempt to classify drainage sub-basins according to their erosion risk. We have adopted a multi-step procedure to face this problem. The input variables were introduced into a GIS – platform. These variables are the vulnerability of the surface rocks to erosion, topographic variations, vegetation cover and land use and drainage basin characteristics. We then constructed a fuzzy inferencemechanism to pre-process the input variables. Next we used neural-network technology to process the input variables. The above system was trained to ‘learn’ and classify the input data. The output of this procedure was a classification of the sub-drainage basins related to their risk of erosion. This neuro-fuzzy system was applied to the island of Lefkas (Greece).

Καμπερίδου Ει. & Πατσαντάρας Ν. (2005). Ο Προβληματισμός περί έμφυλου υποκειμένου στον Ολυμπιακό Αθλητισμό. Άθληση & Κοινωνία, Περιοδικό Αθλητικής Επιστήμης, 20-22, Μαίου 2005. ΤΕΦΑΑ του Δημοκρίτειου Πανεπιστημίου Θράκης, Κομοτηνή: 55-56. [L. 3 in Apella]****Kamberidou, I., & Patsantaras, N. (2005). The Gender Subject in Olympic Sports . In Announcement at the "13th International Conference on Physical Education and Sport" of the Democritus University of Thrace, May 20-22, 2005, Komotini, Greece, published in SPORT & SOCIETY, Sport Science Journal, pp. 55-56. (in Greek) [L. 3 in Apella]

We present and discuss the Scargle periodograms of fast-speed B-band optical photometry of the eclipsing dwarf nova EX Draconis during quiescence and outburst, obtained with the 1.2m telescope of the National Observatory of Athens (NOA) in July 2000. We report on the discovery of a 143 s periodicity which most likely is related to the spin period of the white dwarf. We also find periodicities near 115 and 123 seconds during outburst which may be caused by pulsations of the accreting white dwarf in response to the enhanced mass transfer rate.

Καμπερίδου, Ειρήνη (2005). «Αρχέτυπων νέον: Η αθλήτρια ως κοινωνικό είδωλο» Εισήγηση στο Μεταπτυχιακό σεμινάριο ΑΓΩΝ-ΛΟΓΟΣ ΓΥΜΝΑΣΤΙΚΗ-ΑΘΛΗΤΙΚΗ-ΑΓΩΝΙΣΤΙΚΗ: ΕΠΙΣΤΗΜΗ, Στενή Ευβοίας (Δίρφυς), 11-12  Ιουνίου, 2005. Οργάνωση: Σπουδαστήρια Φιλοσοφίας, Αθλητικού Δικαίου και Στατιστικής του Τ.Ε.Φ.Α.Α. (ΕΚΠΑ) σε συνεργασία με το ΕΚΕΑΔ  και το ΕΛΕΕΑ.--------------------------------------------------------- Στη σημερινή μετανεωτερική πραγματικότητα, αναχρονιστικές ‘βιολογιστικές’ θεωρήσεις ή βιολογικά ‘δεδομένα’  που θεσμοθέτησαν και δόμησαν τις έμφυλες ιεραρχίες στον αθλητισμό αμφισβητούνται και επαναπροσδιορίζονται. Χρησιμοποιώντας τα εργαλεία των κοινωνικών επιστημών, θεωρητικές-μεθοδολογικές προσεγγίσεις που επεξεργάζονται την κοινωνική δόμηση του φύλου στις σύγχρονες δυτικές κοινωνίες, διερευνούνται ζητήματα που αναφέρονται στην συγκρότηση της κοινωνικής ταυτότητας ανδρών και γυναικών, και κατ’ επέκταση στην συγκρότηση της αθλητικής ταυτότητας. Επισημαίνεται, εντούτοις, ότι οι διαφορές μεταξύ γυναικών και ανδρών δεν είναι τόσο μεγάλες όσο είναι οι διαφορές μεταξύ των ίδιων των γυναικών ή μεταξύ των ίδιων των ανδρών, οι οποίες είναι δομημένες σύμφωνα με την κοινωνικο-οικονομική τάξη, την εθνική ταυτότητα, την κουλτούρα, την ηλικία, το χρώμα του δέρματος, τη θρησκεία, το σεξουαλικό προσανατολισμό, την επαγγελματική ιδιότητα, τις σωματικές αναπηρίες, κ.α. Πολλές διαφορές που παρατηρούνται βασίζονται λιγότερο στο βιολογικό φύλο (sex) και περισσότερο στο κοινωνικό φύλο (gender). Σύγχρονες συζητήσεις για το φύλο, την έμφυλη ταυτότητα και το ανθρώπινο σώμα (Kimmel 2004, Evans & Penney 2002, Macdonald 2002, McNay 2000) δεν βασίζονται πλέον αποκλειστικά στο βιολογικό φύλο (sex) ως αναλυτική κατηγορία, αλλά στο κοινωνικό φύλο (gender) το οποίο διαμορφώνει, προσδιορίζει και επαναπροσδιορίζει την ταυτότητα σύμφωνα με  κοινωνικο-πολιτισμικές ερμηνείες και εξελίξεις. Σε αυτά τα νέα θεωρητικά πλαίσια, το σώμα και το φύλο ‘ξανά ανακαλύπτονται’, ανοικοδομούνται, και επαναπροσδιορίζονται, δηλαδή γίνονται αντιληπτά ως μεταβαλλόμενες γλωσσικές συλλήψεις και έννοιες,  κοινωνικό-ιστορικές εκδηλώσεις, και εξελισσόμενα κοινωνικά στοιχεία. Σήμερα, η έννοια του φύλου σταδιακά μεταβάλλεται από μία στατική βιολογική αντίληψη, σε μία δυναμική κοινωνική κατηγορία (το κοινωνικό φύλο)— κοινωνική ομάδα δράσης, κοινωνικός φορέας, κοινωνική ιδιότητα  και κοινωνικό-πολιτισμικό σύμβολο—επηρεάζοντας και αλλάζοντας ως αποτέλεσμα τις προσδοκίες του κοινωνικού περιβάλλοντος.  Σε αυτά τα θεωρητικά πλαίσια το βιολογικό φύλο χάνει την προκαθεδρία του ως αναλυτική κατηγορία. στο σύγχρονο λόγο περί gender (κοινωνικού φύλου) και οι άνδρες, όπως και οι γυναίκες προσδιορίζονται, γίνονται αντιληπτοί ως έμφυλα υποκείμενα (gender subjects). Το gender, που ως σύλληψη (concept) και έννοια, οδηγεί στην ουδετεροποίηση ή απενεργοποίηση της ‘διαφοράς’ (difference) ως αναλυτική κατηγορία, (η οποία παράγει ανισότητα) στοχεύει στο σεβασμού της ποικιλότητας (diversity). Εν ολίγοις, η εισαγωγή  του κοινωνικού φύλου (gender), ως αναλυτική κατηγορία επιχειρεί να απενεργοποιήσει-ουδετεροποιήσει τον παράγοντα του βιολογικού φύλου (sex ή biological gender), της ‘διαφοράς’ ως στοιχείο κοινωνικής κατηγοριοποίησης και κοινωνικού αποκλεισμού, δηλαδή να εξαλείψει τις κοινωνικές διακρίσεις που πραγματοποιούνται σε πολλούς κοινωνικούς θεσμούς, όπως στην κοινωνική περιοχή του Αθλητισμού. Οι αλλαγές στις αντιλήψεις περί έμφυλων ρόλων παράγουν νέες αθλητικές ταυτότητες και νέες μορφές αυτονομίας και κοινωνικής πρόσβασης. Εντούτοις, εντοπίζονται και νέες μορφές κοινωνικής περιθωριοποίησης-κατηγοριοποίησης. Λόγου χάρη,  ‘ίσες ευκαιρίες’ και ‘ισότητα’ στην εμπορευματοποίηση- εκμετάλλευση του σώματος, το έμφυλο σώμα, η μοντελοποίηση των αθλητών-αθλητριών, και η σταδιακή εμφάνιση των άφυλων αθλητών (genderless athletes) στα ΜΜΕ.  

• Kamberidou, I. (2005).  “The female athlete as a social idol:  gender, physical education & sport. Presentation (12/6/2005) at the Graduate seminars “Agon-Logos, Gymnastics-Athletics-Agonistiki”, organized by the Laboratories of Philosophy, Sports Law and Statistics of the Faculty of Physical Education and Sport Science of the University of Athens in collaboration with the Hellenic Sport Science Association and the Hellenic Sports Law Research Centre, Euboea, Greece 11-12 June 2005. [official language Greek] L. 5 in Apella  

Καμπερίδου, Ειρήνη (2005).  «Ο Έμφυλος Ηρωισμός του Αθλητισμού». Εισήγηση στην διημερίδα με θέμα: «Μεσογειακή Κουλτούρα-Γυναίκες και Σπόρ» της Πανελλήνιας Ένωσης για την Προώθηση των Γυναικών στον Αθλητισμό και τα Σπόρ (ΠΕΠΓΑΣ), 4-5 Νοεμβρίου, Θεσσαλονίκη.   -------------------------------------------------------------------------------------------------------------Δεν γεννιόμαστε με μία βιολογική προδιάθεση για μια έμφυλη ανισότητα. Οι έμφυλες διαφορές και ομοιότητες, η κυριαρχία ή η ‘υπεροχή’, δεν είναι γνωρίσματα των χρωμοσωμάτων μας. Είναι αποτέλεσμα της διαφορετικής πολιτιστικής και κοινωνικής αξιολόγησης των εμπειριών των ανδρών και των γυναικών. Γινόμαστε έμφυλα άτομα μέσα σε μία έμφυλη κοινωνία, δηλαδή σε μία κοινωνία που οι οργανισμοί και θεσμοί της αναπαράγουν τις ‘διαφορές’ μεταξύ γυναικών και ανδρών.  Η έννοια ή το νόημα του φύλου διαφέρει από πολιτισμό σε πολιτισμό, από κοινωνία σε κοινωνία, από κουλτούρα σε κουλτούρα. Το κοινωνικό φύλο σε αντίθεση με το βιολογικό φύλο διαφέρει και μεταβάλλεται, ακόμα και μέσα σε μία συγκεκριμένη κοινωνία, σε μία κουλτούρα ή σε ένα πολιτισμό, όχι μόνο μακροπρόθεσμα, ανάλογα με την ιστορική περίοδο, αλλά και κατά την διάρκεια της ζωής μας. Αντιλήψεις και στάσεις περί έμφυλων ρόλων και έμφυλων στερεότυπων εξελίσσονται, μεταλλάσσονται και αλλάζουν. Οι αθλήτριες της καινούργιας χιλιετηρίδας καταρρίπτουν τα ‘φυσικά εμπόδια’ του παρελθόντος και παράγουν νέες κουλτούρες και νέες αθλητικές ταυτότητες. Εντούτοις, πολλές συζητήσεις και διερευνητικά ερωτήματα προκαλούνται σχετικά με τη διαφορετική μεταχείριση ανδρών και γυναικών στους αθλητικούς θεσμούς, στον αγωνι9στικό αθλητισμό και την προβολή του στα ΜΜΕ. Αναμφίβολα, ο Αθλητισμός συνεχώς δημιουργεί, κατασκευάζει και αναπαράγει ‘ήρωες’ και 'ηρωίδες’, έμφυλα υποκείμενα που προβάλλονται με ιδιαίτερους τρόπους. Επισημαίνουμε ότι και ο άνδρας είναι ένα έμφύλο υποκείμενο ( gender subject), και όχι μόνο η γυναίκα. Αναδεικνύεται, ωστόσο ότι οι αθλήτριες που πετυχαίνουν αντιμετωπίζουν τη διφορούμενη ανταπόκριση του κοινού και των ΜΜΕ. Η αθλήτρια-ηρωίδα, σε αντίθεση με τον ήρωα-αθλητή, προσδιορίζεται διαφορικά και υπό-όρους. Επιπροσθέτως, παρατηρείται ότι η δημιουργία και η προβολή των ‘ηρωίδων’ του αθλητισμού αποσύρει την προσοχή από την γενική θέση της πλειοψηφίας των γυναικών στον αθλητισμό και αποκρύπτει τις διαφορές μεταξύ τους. Δηλαδή, αγνοούνται κοινωνική παράμετροι και μεταβλητές, όπως η πολυπλοκότητα, η πολλαπλότητα ή οι κατηγορίες της ‘διαφοράς’ του έμφυλου υποκειμένου σε σχέση με την κοινωνικο-οικονομική τάξη, την κοινωνική στρωμάτωση, την κουλτούρα, το έθνος, την φυλή, το χρώμα του δέρματος, τη θρησκεία, τις σωματικές αναπηρίες και το σεξουαλικό προσανατολισμό

The scope of this article is to present the diachronic value of Xenakis’ technological thought in computer musicresearch and creation of our days within a comparative and critical approach. On the one hand, we will refer to the maindomains of Xenakis’ contributions to Music Technology: the conquest of the computer as a tool for logicaltransformations of symbols into music and a laboratory of automation for certain compositional tasks on meta-musicaland compositional design issues; his pedagogical and compositional approach by the sound-design system UPIC as aninterface between musician and machine; his granular approaches of sound synthesis as a link between algorithms andthe creation of new sounds; the multi-sensoring approach of the conception of Polytopes where he combines varioustechnological tools in order to achieve a kind of a total art work.On the other hand, we will exalt the impact of his research in current music technology (use of the granular model inmodern synthesizers, the marriage between sound and light in modern interactive performances, the design of new userfriendlytools for the music education, etc).At the same time, we will discuss in which way many of the headmasters of computer music research have beenprofoundly affected by Xenakis’ technological and epistemological approach.

We present a small polaron hopping model to interpret the high-temperature electrical conductivity measured along the DNA molecules. The model takes into account the one-dimensional character of the system and the presence of disorder in the DNA double helix. The experimental data for the lambda phage DNA (λ-DNA) and the poly(dA)-poly(dT) DNA follow nicely the theoretically predicted behavior leading to realistic values of the maximum hopping distances supporting the idea of multiphonon-assisted hopping of small polarons between next nearest neighbors of the DNA molecular "wire".

Naxos is the biggest island of the Cyclades. It is composed primarily of mica-shists, gneiss and marbles and granodiorites in the western part. The latter extend along parts of the studied area. Detailed coastal geomorphological study and GIS analysis made possible the determination of coastal evolution of this area during Late Quaternary. A number of shallow drillings and archaeological evidence helped in the determination of the sequence of the coastal evolution of the study area. Two sets of coastal dunes were mapped reaching elevation of 4 and 8 m respectively, plus older well preserved dune fields reaching elevations up to 18m located in the south. It was found that three granodiorite capes were small islands at the end of the last transgression in Mid Holocene. Since then, parts of the coastline, prograded joining them and forming coastal dunes, beachrocks and wetlands in several locations.

New CCD observations of the pulsating star SZ Lyn are analyzed and a new ephemeris is proposed. The photometric data collected over the last 43 years are used to determine and update the pulsational and orbital elements, based on the light-time effect detected in the O-C diagram.

Titan's vertical atmospheric temperature profile, atmospheric chemical composition and haze structure are controlled by many processes. In this work we present a self-consistent 1D simulation of radiation transfer, photochemistry and haze microphysics that determine Titan's atmosphere and haze. The atmospheric model extends from the surface up to the lower thermosphere and incorporates: high resolution radiation transfer codes for solar and thermal radiation, complete neutral species photochemical evolution and a detailed Eulerian description of the microphysical haze particle growth. Chemical analysis of the laboratory produced haze analogs, suggests that the most probable photochemical pathways leading to haze formation, include copolymers of acetylene, hydrogen cyanide, aromatics and others. Although these pathways produce a Haze monomers mass production rate of the correct magnitude to fit the geometric albedo, their production profiles are significantly different from the simplified ones used in previous simulations. The photochemical part of the model produces the vertical profile of all the important hydrocarbons and nitriles in Titan's atmosphere including the polymerisation of organic species for Haze production. This interaction of the Haze precursors with the chemistry is considered to take place until the precursors reach a typical mass of ∼1000 amu, after which the polymers chemical growth ceases and the conglomeration of the Haze particles commences. The resulting distribution of different size particles, along with the rest of the species interacting with the radiation field are included in the radiative/convective part of the model for the calculation of the thermal structure. The model iterates between these processes until a steady state is reached. The results presented are validated against observed data (geometric albedo, chemical composition, thermal structure, etc.) in order to understand better the physical processes that control: Titan's methane abundance; the production, structure and radiative properties of the haze; and the radiative properties of Titan's atmosphere and surface.

The main research aim of this paper is to examine the slope-stream erosionalprocess in the Korinthos drainage basin located in the north – eastern part ofPeloponnese, Greece, by means of applying the fuzzy set theory on a GIS platform.The main steps of this procedure are: the definition of the input variables (erodibilityof rocks, slope angle, slope morphology), the construction of a fuzzy inference system based on theoretical and empirical knowledge for transforming the input to output variables (erosion – deposition) and the visualization of the output variables (Spatial distribution of the erosion-deposition processes). The earth’s surface is the result of endogenous (weathering) and exogenous (erosion) processes. Weathering destroys chemically, biologically and mechanically the structure and the cohesion of the rock. The erosional mechanism transports the sediment and depends on many factors such as: frequency and magnitude of precipitation, surface and subsurface waters, slope elements (geometry, length and angle), rocks’ susceptibility to erosion, vegetation cover, human actions and land use. The study of the erosional process demands a series of steps in order to obtain the final output maps. These steps include: 1) field-work, air-photos and satellite images interpretation, map digitization (geological, topographical, drainage), 2) definition of input and output variables, 3) formulation of the proper logical rules (Boolean or fuzzy) for the transformation of input variables to output variables, 4) analysis and visualization of the output results.The input variables used in this research are: erodibility of rocks, slope angle andslope morphology. The erodibility of rocks depends on many variables which showspatial and time variation. Firstly, it depends on physical and chemical characteristics of the rocks and the rocks’ structure and discontinuities. Secondly, it depends on the existence of a protective vegetative cover which contributes in the increase of the infiltration capacity and limits the runoff flow. Thirdly, it depends on the characteristics of the involved processes: the intensity and duration of precipitation and also its spatial and time distribution and its raindrop size.The input variables are inserted into a fuzzy inference system, constructed in orderto transform them to output variables (erosion-deposition variable). This is achievedby the formulation of the proper ‘if…then’ rules based on theoretical as well asempirical knowledge of the erosional processes.The output variable (erosion) expresses the degree of erosion and deposition ofthe various parts of the drainage basin and is presented through erosion risk maps of the area that is studied.

The outburst and eclipse characteristics of the eclipsing dwarf nova EX Dra prompted us to monitor it during the months July-August 2000 with the 1.2m telescope of the National Observatory of Athens (NOA). Here, we present an eclipse mapping study of the July 2000 light curves. B-band of the August 2000 data have been presented by Harlaftis et al. (2002).

The physical parameters of ten eclipsing binaries (eight contact and two semi-detached) are derived by using ground-based photometric observations and Hipparcos/Tycho photometric data, which mimic the photometric observations that are expected to be obtained by Gaia. The results are compared and the achievable precision of the basic stellar parameters derived by Gaia photometry is discussed.

We report the growth of single-phase, stoichiometric polycrystalline thin films of the half-Heusler ferromagnet NiMnSb, predicted to be half-metallic, on single crystal (100) InSb substrates heated at 200 °C by pulsed laser deposition (PLD). The NiMnSb target used for the PLD deposition was synthesized by arc melting and had a saturation magnetization, MS (5K) ≤ 4μB/formula unit. The films exhibited saturation magnetization, MS (5K) ≤ 4μB/formula unit and coercive fields of 2 Oe at 300 K, indicating good structural quality. The temperature dependence of the saturation magnetization shows that at low temperature (T < 200 K) the system behaves like a Heisenberg ferromagnet as expected for a half-metal, while at T > 200 K behaves like an itinerant ferromagnet. © 2005 IOP Publishing Ltd.

In this paper the study of geomorphological characteristics, developed because of the run off, in the Cyclades area and especially in Tinos, Mykonos and Naxos islands, has taken place. In order to explain their development, the geomorphological characteristics were correlated with the lithological, tectonical and hydrological characteristics of the study area. The study area is characterized by a wide variety of different lithological and hydrogeological factors. To achieve this study’s targets, GIS and GPS technology was used in order to geographicallyand statistically analyse the morphological, hydrological, lithological and tectonic factors of this area. The main sources were the pre-existent maps and the literature, aerial photos and satellite images, while the extensive field work resulted to the geomorphological mapping of the area. The results of this study are related to the analysis of the current morphology and are presented on maps and rodograms.

The Cycladic islands are located in the central Aegean Sea (Greece) in a relatively low seismicity area and are composed mainly of metamorphic and plutonic rocks. Although the Cycladic plateau is believed to be an entity, a closer morphologic study of the islands through GIS, separates them into two parts: the eastern shallower one (Andros, Tinos, Mykonos, Naxos, Paros, Syros, Ios, Sikinos, Folegandros) which formed one big island (6.978Km2) at the end of the last glacial period; the western islands (Kea, Kythnos, Serifos, Sifnos, Milos) remained separated during the same period. It is concluded that the eastern islands constitute an erosional plateau which is a product of a Neogene palaeosurface that is partially submerged due to thinning of the crust during the Quaternary.