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Search Results: 1 - 10 of 447 matches for " Vitali "
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Information and communication technology in science learning as a tool for “scientific thinking” in engineering education  [PDF]
Eugeny Smirnov, Vitali Bogun
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.212171
Abstract: New methodologies in science (also mathemat- ics) learning process and scientific thinking in the classroom activity of engineer students with ICT (information and communication technology, including also graphic calculator) are presented: visual modelling with ICT, action research with graphic calculator, insight in classroom, com- munications and reflection of integrative ac- tions. How can we show our students the beauty of science (and mathematics) with ICT and the way scientists think and try to find the truth? Is it possible to create the motivation in science learning for students using ICT or graphic cal- culator? How can we organize the engineer training on such professional activity in class- room? In this paper we try to answer the ques- tions using methodology of visual modelling and technology of resource lessons in high en- gineering school.
Sonoluminescence as the PeTa Radiation, Part Three  [PDF]
Vitali A. Tatartchenko
Optics and Photonics Journal (OPJ) , 2018, DOI: 10.4236/opj.2018.86017
Abstract: This paper is the third in a series published in this journal during 2017-2018. These three papers present various stages in the development of the PeTa model for phenomena of the same physical nature: cavitational luminescence (CL), multi-bubble sonoluminescence (MBSL), single-bubble sonoluminescence (SBSL), and laser-induced bubble luminescence (LIBL). The basis of this model is the PeTa (Perel’man-Tatartchenko) effect—a nonequilibrium characteristic radiation under first-order phase transitions, for instance, vapour condensation. The third iteration of this model “Vapour bubble luminescence” (VBL) is presented in this paper. The essence of this model is as follows: with a local decrease of pressure or an increase of temperature in a tiny volume of the liquid, one or several bubbles filled with vapour will appear. Subsequently, a very rapid increase in pressure or a decrease in temperature of the bubble leads to super-saturation of the vapour inside the bubble, followed by its instantaneous condensation with the emission of condensation energy (this is the PeTa effect). A sharp decrease in pressure causes the collapse of the bubble accompanied by a shock wave in the liquid. VBL model is conveniently represented on the solid-liquid-vapour phase diagram. A better understanding of the physical nature of the phenomena under consideration could help to find their useful applications. To develop this idea further, we propose a design of a cavity-free pulsed laser on the basis of CL/MBSL/SBSL. An analysis of LIBL in cryogenic liquids is also given in this paper.
Immunopathologic differences of Sj?gren's syndrome versus sicca syndrome in HCV and HIV infection
Claudio Vitali
Arthritis Research & Therapy , 2011, DOI: 10.1186/ar3361
Abstract: Sj?gren's syndrome (SS) is a chronic systemic autoimmune disease mainly affecting the exocrine glands. For this reason, the definition of autoimmune exocrinopathy has been proposed in the past for this disorder [1]. Behind the involvement of exocrine glands (pre-dominantly the lachrymal and the salivary glands), other nonexocrine epithelial lesions may be observed in a large number of patients. Consequently, the disease has been alternatively termed as autoimmune epithelitis [2].Finally, autoantibody-mediated or immune-complex-mediated vasculitic lesions - compromising various organs or systems, such as the peripheral or central nervous system, skin, lung or kidney - may complicate the disease course, in a more limited number of patients. This justifies the inclusion of SS among the systemic autoimmune diseases [3]. Furthermore, SS has received the attribute primary (pSS) when it appears alone, or secondary when it is associated with another well-defined systemic autoimmune disease, such as systemic lupus, rheumatoid arthritis or systemic sclerosis [4].The presence of focal lymphomonocytic infiltrates in the target organs, particularly in the salivary and lachrymal glands, has been considered the hallmark of the disease. The focus consists of an agglomerate of inflammatory cells, mainly lymphocytes, which are located around the acinar and ductal structures of the glands. The presence of at least 50 mononuclear cells is the conventionally accepted definition for the focus [5]. Because of the difficulty in obtaining lachrymal gland tissue, and the fear of causing facial nerve palsy or parotid fistulae in performing parotid gland biopsy, obtaining glandular tissue from minor salivary glands (MSGs) has been proposed as a more easily and less invasive approach for the histologic analysis of the target tissue [5]. The biopsy of sublingual glands has been alternatively suggested, but it seems to be a more complicated surgical way to take a sample of gland salivary tissue [
L’evoluzione del diritto ecclesiastico nella giurisprudenza della Corte costituzionale
Enrico Vitali
Stato, Chiese e Pluralismo Confessionale , 2011,
Abstract: Testo dell’intervento alla Tavola rotonda sul tema “Il diritto ecclesiastico e la formazione del diritto vivente nella giurisprudenza della Corte costituzionale” (Roma, 15 novembre 2007), svoltasi in occasione della presentazione del volume, a cura di R. Botta, Diritto ecclesiastico e Corte costituzionale, ed. ESI, Napoli, 2006, destinato alla pubblicazione sul prossimo numero de Il diritto ecclesiastico. SOMMARIO: 1. Tre grandi periodi – 2. L’ultimo triennio – 3. Verso un punto di equilibrio.
Laicità e dimensione pubblica del fattore religioso Stato attuale e prospettive Relazione di sintesi
Enrico Vitali
Stato, Chiese e Pluralismo Confessionale , 2011,
Abstract: Nei giorni 17 e 18 settembre 2009 si è tenuto a Bari il Convegno Nazionale dell’ADEC sul tema “Laicità e dimensione pubblica del fattore religioso. Stato attuale e prospettive”. Gli atti sono in corso di stampa. Riteniamo di far cosa gradita agli studiosi anticipando qui la relazione di sintesi della prima giornata del Convegno tenuta dal Presidente dell’ADEC Prof. Enrico Vitali SOMMARIO: 1. Introduzione ai temi del Convegno (Giovanni Varnier) – 2. Profili costituzionali - 2.a) Il sistema di accordi con la Chiesa cattolica e l’incidenza delle fonti unilaterali statuali (Giuseppe Dalla Torre) - 2.b) Laicità e prevalenza delle fonti di diritto unilaterale sugli accordi con la Chiesa Cattolica (Nicola Colaianni) – 3. La situazione delle minoranze religiose tra autonomia e immobilismo del legislatore - 3.a) Le minoranze religiose tra autonomia e immobilismo del legislatore (Mario Tedeschi) - 3.b) Le minoranze religiose (Silvio Ferrari) - 4. – Il diritto regionale e il diritto locale - 4.a) Laicità e collaborazione a livello locale. Gli equilibri tra fonti centrali e periferiche nella disciplina del fenomeno religioso (Pierangela Floris) - 4.b) Laicità e spazi urbani. Il fenomeno religioso tra governo municipale e giustizia amministrativa (Roberto Mazzola) - 5. La giurisdizione - 5.a) Il diritto “vivente” nella giurisprudenza della Corte di Cassazione (Raffaele Botta) - 5.b) Le ultime tendenze giurisprudenziali del Consiglio di Stato (Paolo Moneta).
La bibliothèque de Shéhérazade en voyage. Reprises et réécritures d’un livre-édifice dans la littérature algérienne contemporaine
Ilaria Vitali
Voix Plurielles , 2010,
Abstract: Au carrefour de l’Orient et de l’Occident, la littérature algérienne de langue fran aise a su s’approprier la bibliothèque du recueil des Mille et une Nuits pour en faire un espace scripturaire complexe. Véritable livre-édifice riche en symboles, le célèbre recueil a construit par sa structure un ensemble foisonnant de textes qui ont enchanté le lecteur et ont fait l’objet d’innombrables remaniements et emprunts. Il suffit de penser aux romans d’Assia Djebar, de Le la Sebbar et plus récemment à ceux de Salim Bachi et de Mourad Djebel. Nous proposons d’explorer l’étoilement de cette bibliothèque dans la littérature algérienne contemporaine, qui a su exploiter les étagères des Mille et une Nuits comme un véritable espace à habiter et à réinventer.
état et société civile : une coopération conflictuelle
Rocco Vitali
Pyramides : Revue du Centre d'Etudes et de Recherches en Administration Publique , 2011,
Abstract: A partir des années 1970, l’étude des relations entre les instances organisées de la société civile et l’état a connu un développement important. Depuis les précurseurs s’inscrivant dans une démarche communautarienne , jusqu’à l’élaboration, plus récente, de cadres théoriques dit relationnels , le volume des propositions théoriques n’a pas cessé d’augmenter. Cet article propose une lecture critique des principales théories. L’accent est mis sur la dimension heuristique des différentes approches exposées. Celles-ci sont donc évaluées en fonction de leur capacité à rendre compte empiriquement des rapports existant entre organisations de la société civile et acteurs étatiques. Dans les conclusions, sont soulignés les avantages épistémologiques du cadre théorique relationnel .
System Reliability at the Crossroads
Vitali Volovoi
ISRN Applied Mathematics , 2012, DOI: 10.5402/2012/850686
Abstract:
System Reliability at the Crossroads
Vitali Volovoi
ISRN Applied Mathematics , 2012, DOI: 10.5402/2012/850686
Abstract: This paper surveys the current state of research related to the modeling and prediction of failures of engineering systems. It is argued that while greater understanding of the physics of failure has led to significant progress at the component level, there are significant challenges remaining at the system level. System reliability, a field of applied mathematics that addresses the latter challenges, is at a juncture where fundamental changes are likely. On the one hand, the traditional part of the field entered a phase of diminishing returns, largely having followed the trajectory of the Cold-War era technology development: golden years of rapid growth in the 1950s and 1960s, followed by maturation and slowing down in the ensuing decades. On the other hand, the convergence of several technologies related to data collection and processing, combined with important changes in engineering business and government priorities, has created the potential for a perfect storm that can revive and fundamentally transform the field; however, for this transformation to occur, some serious obstacles need to be overcome. The paper examines these obstacles along with several key areas of research that can provide enabling tools for this transformation. 1. Background 1.1. Introduction: Avoiding Failures as an Inherent Part of Engineering It can be argued that studying the failures of engineering systems is as old as engineering systems themselves. By its very definition, successful design implies that failures are avoided: the airplane designed by S. P. Langley failed, while that made by the Wright brothers did not. As a result, any engineering discipline relies on practices that avert failures. Aging and associated degradation of the system’s properties might introduce additional challenges, as it might take years before a technological flaw manifests itself. For example, the design of the I-35W bridge over the Mississippi river in Minneapolis would have ensured that the bridge would not collapse under normal operating conditions, if it were not for the design flaw related to the sizing of Gusset plates. The bridge, which was opened for traffic in 1967 and collapsed forty years later, was built using design principles specified in the construction codes of the time that should have been sufficient to prevent failures. In the case of I-35W bridge, the influence of corrosion on integrity of bridges is well known, so appropriate safety factors are used in construction, combined with the periodic inspections for estimation of the corrosion impact. Steel bridges have been
Formation of superheavy elements in heavy-ion collisions
Vitali Denisov
Physics , 2001,
Abstract: The cold fusion reactions related to 208Pb and 209Bi targets leading to superheavy elements (SHE) with Z=104-112 have been successfully considered in our model recently. Here we briefly discuss this model and extend our consideration to fusion reactions between similar target and projectile. The reactions between weakly deformed target close to Pb and 76Ge, 82Se projectiles are also studied. The available experimental cross-sections are well described. The nucleus-nucleus interaction potential for reactions leading to SHEs are shortly discussed.
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