68 research outputs found
'Les Perses de l'Occident' de Sotiris Skipis: Une invasion barbare en Europe dans les années 1920
No full textThe study examines the contribution of Sotiris Skipis (1881-1952) to theatrical art, an aspect which has been neglected by contemporary research. It focuses on an almost unknown three-act drama of Skipis, which the present research retrieved from the rare collections of Greek libraries: Les Perses de l' Occident (The Persians of the West). The author published the work in Paris in 1917, before the bloodshed of World War I was beginning to wane, to openly condemn pan-Germanism and racism, even before the latter term prevailed. The paper explores the ideological, aesthetic, and dramaturgical substratum of the text reflecting the spread of racial theories in Europe is explored. It also interprets the reasons that did not allow for the stage realization of the play on Parisian stages at the time of publication, despite the warm praise from Parisian scholarship, and that it took more than a century to pull the play out of oblivion
Corresponding Author
No full textAll rights reserved. No part of this paper may be reprinted or reproduced or utilised in any form or by any electronic, mechanical or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieve system, without permission in writing from the publishers. British Library Cataloguing in Publication Data. A catalogue record for this publication is available from the British Library ISBN [978-0-85328-465-9
Control of a DC Microgrid
No full textThe growth of distributed Renewable Energy share in the total electricity production as wells as technological advancements in power electronics and increase of DC loads, point towards the development of the DC microgrid (DCMG) concept as a valid model for future energy systems especially for operations and locations where the existing grid cannot satisfy.A DC microgrid consist of distributed sources, load and storage connected to a DC bus through converters. The two main issues in a DCMG operation is the power balance between supply and demand and its implementation through the interfacing converters, who in turn must be able to facilitate these operations. Many grid control strategies can be used but whatever the strategy may be, control is achieved through regulation of the DC bus voltage.In this thesis a decentralized primary controller is selected, analyzed and modelled for power balance operations in an islanded 48V-LVDC microgrid, consisting of a renewable energy source, an electronic load and storage capability. Control is achieved through dc bus voltage monitoring and control operations on the interfacing converters, based on predefined voltage set points. As an interfacing converter, a cascaded half bridge buck and boost converter is used and controlled. Two different control modes are implemented: buck operation for the start-up of the grid and a special constant frequency modulation for soft switching and increased efficiency of the converter.Furthermore, its use as multi-purpose converter, its low level control schemes and the co-operation with the high-grid level control are studied. Physical switching models are used to account for the real operation of the converter, when operating under higher level control, aiming at grid stability and optimal power flow.Electrical Engineering | Sustainable Energy Technolog
Children’s Perspectives on Robotics and the Relevance to Educational Robotics Competitions
No full textRobotics is a challenging but also exciting scientific field which provides a framework for STEM (Science, Technology, Engineering, and Mathematics) education. An interview as part of a series of podcasts, called “Science Talks – Kids Edition”, produced by the University of Cyprus, allowed to identify the children’s perceptions and questions on robotics (elementary school and kindergarten ages)
A Survey on Existence Results for Boundary Value Problems of Hilfer Fractional Differential Equations and Inclusions
No full textThis paper is a survey of the recent results of the author for various classes of boundary value problems for Hilfer fractional differential equations and inclusions of fractional order in (1,2] supplemented with different kinds of nonlocal boundary conditions
Establishment of a framework for the design of robotic photovoltaic cleaning systems
No full textGiven the prominent role of solar energy among the other clean energy sources, the increase of
photovoltaic (PV) systems efficiency becomes crucial. A problem that was recognized to degrade
the performance of photovoltaic panels is related to the accumulation of dust (soiling) on their
surface. In general, the common practice of manual cleaning of PV systems is not efficient. For
this reason, it has emerged the need for automatic cleaning procedures. Automated solutions
include integrated cleaning systems and robotized solutions.
From a robot design perspective there exist a plethora of issues to be considered, including its
energy autonomy but also the employment of appropriate path planning and control
methodologies. The available cleaning methods have to be assessed in regard to their suitability
for a robotized solution and the corresponding operation parameters have to be optimized.
A monitoring system can assist in targeted cleaning beyond the scheduled routine cleaning
operations. Towards that direction a suitable concept may integrate intelligent monitoring of a
solar photovoltaic power plant using autonomous drones. An effective robotic cleaning solution
can be further enhanced using other modern technologies including advanced image processing,
artificial intelligence (AI), machine learning and internet of things (IoT).
The objective of this work is to provide a general perspective of the problem. The motivation for
the development of robotized PV cleaning solutions is justified and the application requirements
are identified. A general framework for the design of PV cleaning robots is established. Relevant
works are reviewed, already proposed systems are categorized and research challenges are
identified
Metal Forming Process Efficiency Improvement Based on AI Services
No full textPublisher Copyright: © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.In this work, the application of Artificial Intelligence (AI) and Machine Learning (ML) techniques in the field of metal forming processes in Shear Forming and Spinning machines are explored. The main objective is to improve the quality of the parts produced and the efficiency of these processes through the implementation of predictive models and online value-added services. Firstly, different methods for the analysis and evaluation of the quality of manufactured parts are presented. Additionally, predictive models for online failure detection are developed, based on historical and real-time data, which helps prevent failures and reduce production costs. Furthermore, the challenge of detecting changes in the input material, which can have a significant impact on process outcomes, is addressed. Lastly, the implementation of an algorithm towards “zero defects” is proposed to achieve optimal conditions in the metal forming process. The described approaches enable customers of the incremental forming machine manufacturer to access a diverse range of services associated with the implemented methods. ...Peer reviewe
Rebels with a Cause: The December 2008 Greek Youth Movement as the Condensation of Deeper Social and Political Contradictions
No full textThe events of December 2008 in Greece represent a turning point in social movements against neoliberalism and capitalist restructuring. They were the result of worsening employment prospects for young people, the aggressive restructuring of the educational system and concern about the effects of the current economic crisis. The originality of the movement lies in its unique scale, in the expression of a new unity of youth in struggle, in the demand for radical change and in its anti-systemic character. It can be viewed as further evidence of the crisis of neoliberal hegemony and as a sign of growing hegemonic instability in European capitalist social formations. For this reason it poses both a theoretical and a political challenge. Copyright (c) 2010 The Author. Journal Compilation (c) 2010 Joint Editors and Blackwell Publishing Ltd.
Retail Building Cycles: Evidence from Great Britain
Full text linkThis study examines the cyclical pattern of retail property development in Great Britain. It develops and estimates an econometric model of the volume of new development starts for retail buildings. Within the theoretical framework proposed, a dynamic specification based on changes in real retail rents and total consumer spending appears to adequately capture the cyclical variation in retail development. Changes in the values of these variables induce new retail construction within two years and an Almon polynomial lag scheme best describes the dynamic distribution of their lagged effects. Investment market influences on retail building development at the national level are not established in this study. There is also some indication of a changing economic relationship between new retail development and retail rents after mid-1995, but this can only be confirmed by appropriate tests when additional observations become available.
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Μεταφράζοντας την μεταγλωσσικότητα στη λογοτεχνία της μετανάστευσης: Θανάσης Βαλτινός και Σωτήρης Δημητρίου
No full textIncreasingly literature asks how to translate the foreign accents and multilingual idioms of the migrant. Two Greek fictional works – one about Greeks in the United States, the other about Greek Albanians in Greece – address this question by developing translingual practices that are themselves translational. Using creoles that blend languages through transliteration and homophony, these works imagine translation solutions that challenge the hegemony of standardized national languages. How might attention to translational poetics in the source text enable translators to be more experimental? How might comparative studies of translingualism in literature and literary translation offer new categories for understanding migration?
Keywords: migration, translation, translingualism, transliteration, homophony
Alternative forms of the author Van Dyck's name: Κάρεν Βαν Ντάυκ, Κάρεν Βαν Ντάικ
Transliterated title: Metafrazontas ti metaglossikotita sti logotehnia tis metanastefsis Thanasis Valtinos kai Sotiris Dimitrio
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