163,606 research outputs found

    Experimental tests about the cooling/freezing of the molten salts in the receiver tubes of a solar power plant with parabolic trough

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    In 2003 ENEA realized the PCS experimental Facility at Casaccia Research Centre (Rome, Italy), in order to test in real operating conditions the components of a parabolic trough solar plant, and to evaluate the technical feasibility of using the solar molten salts mixture (60% NaNO3, 40% KNO3, melting point 220÷240°C) in such a type of plant. ENEA also had the need to assess the behaviour of the solar receiver tubes during abnormal operating situations (wrong operation, pump block, power failure, etc.), when a block of the circulation of the molten salts may occur and cause the cooling or, worse, the freezing of the salts mixture inside the pipes. Some experimental tests have been performed, aimed to examine what happens in such a cases. In fact, without quick maneuvers to restart the circulation of the molten salts or to readily empty the receiver tubes, the molten salts contained in them may cool down to temperatures near/below the solidification. In this report are shown the results of the experimental tests carried out on the receiver tubes of the PCS Facility by cooling the process fluid down to temperatures near or below its freezing point. The tests show that the solidification of the salts does not damage the components of the plant but it is manageable and reversible, provided you apply the correct procedures. © 2017 Author(s)

    Analysis of a helical coil once-through molten salt steam generator: Experimental results and heat transfer evaluation

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    A molten salt helical coil steam generator is an alternative to kettle- or drum-type evaporators which are currently used in commercial-scale solar thermal power plants. A 300 kW prototype was tested during the OPTS project at ENEA. The experimental results presented in this paper have been used to validate a detailed heat transfer analysis of the whole system. The heat transfer analysis deals with the study of both the overall heat transfer coefficient and the shell-side heat transfer coefficient. Due to the specific features of this type of system, no correlations were available in the literature. A new numerical model to predict the performance of large-scale systems is also presented. © 2016 Author(s)

    Prof. Th. W. Adorno and the author Hans Erich Nossack.

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    Prof. Th. W. Adorno and the author Hans Erich Nossack at a reception of Insel Verlag, Buchmesse Frankfurt 1966LB

    Review Journal (Rinaldi Virgas W / 130216383)

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    pemberdayaan sumber daya manusia di Indonesia dalam menghadapi revolusi industri 4.

    Nowe spojrzenie na planowanie architektury mieszkaniowej w afryce subsaharyjskiej

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    The author shares his reflections on state of art in housing and urban planning, deficiencies, expectations and possibilities in the Sahel region of Africa. He notices, that the housing problem in Africa is one of the challenges, which should be solved in order to recover life dignity of African people and secure their rights to traditional family life in acceptable conditions. The paper describes the studies on the typical dispersed urban structures and the need to foster this type of settlement structure and proposals of introduction of new on light steel frame housing system in the area of Sahel, combining the traditional way of building houses with modern technology. The particularly analysed case, is the housing problem in the Republic of Chad. The author presents the basic discussion on this topic and his architectural proposals. Unfortunately, the gap between the needs and the financial feasibility of housing construction in this area, makes this project already at the starting point extremely difficult to be realized without external subventions.Problem mieszkaniowy w Afryce jest jednym z wyzwań, które należy rozwiązać, aby Afrykanie mogli odzyskać godność życiową i zabezpieczyć swoje prawa do tradycyjnego życia rodzinnego w akceptowalnych warunkach. W artykule opisano badania nad typowymi rozproszonymi strukturami miejskimi i potrzebą wspierania tego typu struktur osadniczych oraz propozycji wprowadzenia nowego systemu konstrukcji domów, opartym na lekkim szkielecie stalowym, łączącym tradycyjny sposób budowania domów z nowoczesną technologią. Przypadkiem szczególnie analizowanym jest problem mieszkaniowy w Republice Czadu. Autor przedstawia podstawową dyskusję na ten temat i swoje propozycje architektoniczne. Niestety luka między potrzebami mieszkaniowymi w Czadzie a finansową wykonalnością budownictwa mieszkaniowego w tym obszarze sprawia, że projekt ten, już w punkcie wyjścia, jest niezwykle trudny do realizacji bez uzyskania zewnętrznych dotacji

    The child as citizen: holder of rights and competent. The Reggio Emilia educational experience

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    The Convention on the Rights of the Child, approved by the General Assembly of the United Nations on 20 November 1989, states in Article 2 that “States Parties shall respect and ensure the rights set forth in the present Convention to each child within their jurisdiction without discrimination of any kind, irrespective of the child's or his or her parent's or legal guardian's race, colour, sex, language, religion, political or other opinion, national, ethnic or social origin, property, disability, birth or other status.” Therefore, the child becomes a citizen from birth and is competent to learn from birth. Competent in learning, asking questions, seeking answers, and generating a culture of their own. By affirming the right to be recognised as a citizen of the present, competent, culture-generating, we affirm the strength and extraordinary potential of the child and their right to express it. Infant-toddler centres and preschools are excellent educational places, where to build the paradigm of care and community for the child as citizen. Not all-encompassing places for education, but essential. They help to process, rework and update childhood data, to define childhood and to be defined by them and to define societies. It is not just the care of the child, it is the child’s culture, it is the child’s look at the world, their generative whys. The great cultural and political “revolution” of the last century – never completely accomplished – is making children active protagonists, leaving them their autonomy, considering them as holders of rights and culture. But now we know that society needs its childhood, [email protected] Reggio Children – Centro Loris Malaguzzi (The Reggio Children – Loris Malaguzzi Centre Foundation)Acemoglu D., Robinson J. 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Perspectives on a Reggio Emilia Diary, St. Paul 2008.Edwards C., Gandini L., Forman G., I cento linguaggi dei bambini, Parma 2017.Edwards C., Gandini L., Forman G., The Hundred Languages of Children. The Reggio Emilia Approach to Early Childhood Education, Norwood, NJ 1993.Freire P., Edução como prática da liberdade, Rio de Janeiro 1973.Freire P., Pedagogia do oprimido, São Paulo 1970.Gallese V., Dai neuroni specchio alla consonanza intenzionale. Meccanismo neurofisiologici dell’intersoggettività, “Rivista di Psicoanalisi” 2007 LII.Gandini L., Etheredge S., Hill L., Insights and Inspirations from Reggio Emilia, Worcester, MA 2009.Gandini L., Mantovani S., Edwards C., Il nido per una cultura dell’infanzia, Azzano S. Paolo 2003.Gardner H., Development and Education of the Mind, London 2005.Gardner H., Five Minds for the Future, Harvard 2006.Gardner H., Frames of Mind. The Theory of Multiple Intelligence, New York 1983.Gardner H., The APP Generation: How Today's Youth Navigate Identity, Intimacy, and Imagination in a Digital World, New Haven 2014.Giudici C., Vecchi V., Children, Art, Artists. The Expressive Languages of Children, the Artistic Language of Alberto Burri, Reggio Emilia 2004.Giudici. C., Krechevsky M., Rinaldi C., Making Learning Visibile, Reggio Emilia 2001.Giudici. C., Krechevsky M., Rinaldi C., Rendere visibile l’apprendimento, Reggio Emilia 2009.Godbout J.T., Caillé A., The World of the Gift, tr. Donald Winkler, Montreal 1998.Grieshaber S., Hatch J.A., Pedagogical documentation as an effect of globalization, “Journal of Curriculum Theorizing” 2003, 19, no. 1.Hall E. L., Rudkin J. K., Seen and Heard. 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    Seeing the world anew : the radical vision of Martin Waldseemüller's 1507 & 1516 world maps /

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    9781929154470 (ISBN). 192915447X (ISBN). First edition 2012. Accompanied by 2 foldeds map in front and back pockets: 1507 map -- 1516 map.; Includes bibliographical references: pages 98-107.; Maps from pockets also available online http://nla.gov.au/nla.map-vn6254227; Original version of the 1507 map: Universalis cosmographiae secundum Ptholomaei traditionem et Americi Vespucii alioru que lustrationes. [St. Dié, France? : s.n., 1507]; Original version of the 1516 map: Carta marina, navigatoria Portugallen, navigationes atque tocius cogniti orbis terre marisque formam naturamq[u]e situs et terminos nostris temporibus recognitos et ab antiquorum traditione differentes eciam quor[um] vetusti non meminerunt auctores hec generaliter indicat / consumatum est in oppido S. Deodati compositione et digestione Martini Waldseemuller Ilacomili. [St. Dié, France? : s.n., 1516]. Prologue: In a Renaissance Vision, a Glimpse of the Modern / John W. Hessler -- "An island surrounded on all sides by sea" : The World Map, 1507 / John W. Hessler -- "Land of Cuba, part of Asia" : The Carta marina, 1516 / Chet Van Duzer -- Epilogue: A Renaissance That Resonates Still / John W. Hessler -- Notes -- Afterword / Ralph E. Ehrenberg -- About the authors -- Acknowledgments -- The Maps: The 1507 World Map, 12 sheets, with commentary -- Composite: front pocket -- The 1516 Carta marina, 13 sheets, with commentary -- Composite: back pocket

    Klimat społeczny w szkole inkluzyjnej

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    Author presented in this paper theoretical approach to the building of social climate in an inclusive school. The publication indicatessome tendencies and directions of changes to improve the functioning of these institutions and to implement the idea of inclusive education.Autorka przedstawiła w artykule teoretyczne ujęcie zagadnienia związanego z budowaniem klimatu społecznego w szkole inkluzyjnej. W publikacji ukazano pewne dążenia i kierunki zmian, jakich należy dokonywać w masowych szkołach, aby poprawić jakość funkcjonowania tych placówek, tak by kierowały się one ideą edukacji włączającej

    Ewolucja programowa FDP w polityce wschodniej w latach 1949-1969 w świetle nowych zasobów Archiwum Niemieckiego Liberalizmu

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    Zasadniczym celem artykułu jest analiza działalności programowej FDP w polityce wschodniej Republiki Federalnej Niemiec w latach 1949-1969. Autor wykorzystał nowe zasoby Archiwum Niemieckiego Liberalizmu w Gummersbach, co umożliwiło przedstawienie nowej oceny wpływu FDP na politykę wschodnią Republiki Federalnej Niemiec.The main goal of the article is to analyze the FDP's program activities in the eastern policy of the Federal Republic of Germany in the years 1949-1969. Of great importance here is the fact that the author used in this work new archives from the Archives of German Liberalism in Gummersbach. This enabled him to present a new assessment of the FDP's impact on the eastern policy of the Federal Republic of Germany
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