Search results for " time"

showing 10 items of 3005 documents

Integrazione di celle fotovoltaiche ibride nel vetromattone

2012

L’invenzione riguarda l’integrazione del vetromattone con celle solari ibride (organiche/inorganiche), conosciute come Dye-sensitized Solar Cell (DSC). La combinazione del vetromattone con le DSC consente di migliorare le prestazioni del prodotto originario rendendolo in grado di produrre energia pulita. Le caratteristiche di trasparenza e isolamento termo-acustico del prodotto possono essere regolate agendo sulla configurazione delle DSC. Il prodotto può essere assemblato a formare pannelli fotovoltaici per la realizzazione di facciate traslucide energeticamente “attive” in varie condizioni luminose (condizioni di luce diffusa o artificiale) e indipendentemente dall’angolo di radiazione so…

The integration of Dye-sensitized Solar Cell (DSC) with the glassblock is disclosed. The combination of the two technological elements the glassblock and the DSC module enhance their own peculiarities. The final complete product is ready-made for installation owns the qualities of the glassblock and produces sustainable energy at the same time. The transparency and the thermo-acoustic insulation may be modulated according to the specific requirements of each case of installation. The product may be used for example to create PV panels for glazed and translucent façades that are able to perform efficiently in all light conditions (even in diffuse light also converting internal artificial light) that are not dependant on the angle of the solar radiation and do not suffer from the high operative temperatures of functioning due to the peculiarities of the DSCs. DSCs are made of economic and biocompatible materials and are produced with low-cost and highly productive printing methods on rigid or flexible substrates. With the integration of DSC modules with the glassblock PV panels coincide with the envelope itself so that they do not need any further structures to be installed on and allow the possibility of subtract from the price of the panel the price of the substituted building element allowing further economies. DSCs can be printed in different colours and with various patterns offering to designers and customers the possibility of intervening on the glassblock aesthetical aspect also taking advantage of the peculiar modularity of the glassblock for larger compositions of drawings on the building’s façade. Seven Hypotheses of integration are discussed in order to obtain DSC-integrated glassblock ready for the construction of a precast and dry-assembled PV panel which can use the horizontal and vertical cavities between the glassblocks to house plastic profiles where the electric interconnections and the steel bars -useful for improve the mechanical resistance of the panel- are integrated.Settore ICAR/10 - Architettura Tecnica
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Traducción y recepción: Rosalía de Castro en Italia

2020

El panorama de la recepción italiana contemporánea de los poetas españoles del siglo XIX, a través de las traducciones, no resulta especialmente satisfactorio, puesto que hay que esperar el siglo siguiente para encontrar los primeros estudios monográficos y ediciones de textos en traducción, aunque en forma antológica. Ello, no obstante, así como en el resto de Europa, el corpus de las publicaciones periódicas de las revistas ofrece un canal editorial muy proficuo para la recepción de textos literarios extranjeros. Este trabajo se centra en la presencia de la obra de Rosalía de Castro en la prensa italiana contemporánea. Al mismo tiempo, se ha intentado completar el estudio de la recepción …

The panorama of the contemporary Italian reception of the Spanish poets of the 19th century through translations is not particularly satisfactory since it is necessary to wait for the following century to find the first monographic studies and editions of texts in translation although in anthological form. However as in the rest of Europe the corpus of periodicals of magazines offers a very profitable editorial channel for receiving foreign literary texts. This work focuses on the presence of Rosalía de Castro's work in the contemporary Italian press. At the same time attempts have been made to complete the study of the reception of the Galician poet in Italy collecting traces in other editorial products such as the book. The consequent analytical focus will correspond to the transnational study of some proto and meta texts individualized by their special interest.
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Abitare nel reale. Dalla crisi della periferia alla tessitura di nuove relazioni contestuali

2019

I progetti redatti per “Palermo Sud-Est” sono il risultato di un Laboratorio di Laurea strutturatosi attraverso incontri, seminari, comunicazioni specialistiche, esposizioni critiche, che – in una strategia condivisa – ha visto ogni studente elaborare il proprio lavoro nel confronto con gli altri attori del Laboratorio stesso. La ricerca sui “progetti urbani” è stata impostata di modo che ogni laureando fosse messo a conoscenza dei progetti svolti nello stesso ambito territoriale dai colleghi che l’avevano preceduto, così da poter operare in continuità e contribuire a formulare un ragionamento unitario, nel quale ogni progetto costituisse continuazione, verifica o anche variante dei precede…

The projects prepared for "Palermo South-East" are the result of a Graduate Laboratory structured through meetings seminars specialist communications critical exhibitions which - in a shared strategy - saw each student elaborate their work in comparison with others actors of the same Laboratory. The research on "urban projects" was set so that each graduating student was made aware of the projects carried out in the same geographical area by the colleagues who had preceded it so as to be able to operate in continuity and contribute to formulating a unitary reasoning in which each project constituted continuation verification or even variant of the previous ones. These coordinated works have pursued two fundamental objectives: the strengthening of infrastructures and the establishment of specialized public buildings with superior functions aimed at requalifying and regenerating various critical situations with particular attention to the relationship between context and life scenarios. Thus each designer while dealing with a main functional program simultaneously deals with various issues such as the rationalization of the road system the redevelopment of existing buildings the design and refunctionalization of urban services (for example the transformed Central Station in the hotel or the project of a great Mosque)several degree theses have addressed as the main theme or as a question in the background the design of a new bed for the Oreto river and the relative establishment of a park facing it. In this desire to "patch up the wounds" in the different areas of "Palermo South-East" in close relationship with the vicissitudes of the place there is a continuous reference to architectures of all time and some questions involving the functional program are suggested - that identifies the character (or perhaps "type") of what is to be inserted in a given context - and the qualities of living reality as a pivotal material in the design process.Settore ICAR/14 - Composizione Architettonica E Urbana
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The Mathematicians’ Happy Hunting Ground: Einstein’s General Theory of Relativity

2004

There is hardly any doubt that for physics special relativity theory is of much greater consequence than the general theory. The reverse situation prevails with respect to mathematics: there special relativity theory had comparatively little, general relativity theory very considerable, influence, above all upon the development of a general scheme for differential geometry. —Hermann Weyl, “Relativity as a Stimulus to Mathematical Research,” pp. 536–537.

Theoretical physicsTheory of relativityHistory and Philosophy of ScienceStatic interpretation of timeDoubly special relativityGeneral MathematicsQuantum mechanicsAbsolute time and spaceFour-forceTest theories of special relativityEmission theorySpecial relativity (alternative formulations)MathematicsThe Mathematical Intelligencer
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A quantum model of Schwarzschild black hole evaporation

1996

We construct a one-loop effective metric describing the evaporation phase of a Schwarzschild black hole in a spherically symmetric null-dust model. This is achieved by quantising the Vaidya solution and by chosing a time dependent quantum state. This state describes a black hole which is initially in thermal equilibrium and then the equilibrium is switched off, so that the black hole starts to evaporate, shrinking to a zero radius in a finite proper time. The naked singularity appears, and the Hawking flux diverges at the end-point. However, a static metric can be imposed in the future of the end-point. Although this end-state metric cannot be determined within our construction, we show tha…

Thermal equilibriumPhysicsHigh Energy Physics - TheoryNuclear and High Energy PhysicsAstrophysics::High Energy Astrophysical PhenomenaNaked singularityFOS: Physical sciencesRadiusGeneral Relativity and Quantum Cosmology (gr-qc)General Relativity and Quantum CosmologyBlack holeGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theory (hep-th)Quantum stateQuantum mechanicsMetric (mathematics)Schwarzschild metricAstronomiaProper time
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Surface and bulk changes of a Pt 1%/Ce0.6Zr0.4O2 catalyst during CO oxidation in the absence of O2

2004

The reduction of a Pt 1%/Ce0.6Zr0.4O2 catalyst by CO in the absence of gaseous oxygen was studied by transient reactivity tests, temperature programmed surface reaction with CO, flow thermogravimetric tests and DRIFTS experiments, in order to obtain information generally on the OSC properties and, specifically, on the mechanism of CO oxidation over both, Pt catalyst and support-only sample (Ce0.6Zr0.4O2). The results of thermogravimetric experiments showed the presence of an induction time in the weight change % of the catalyst, depending on the CO concentration in the gas flow. This induction time could be related to the presence of two oxygen reactive sites. The first one leads to strongl…

Thermogravimetric analysisChemistryInorganic chemistryWeight changeAnalytical chemistrychemistry.chemical_elementInduction timeGeneral ChemistrySurface reactionOxygenCatalysisCatalysischemistry.chemical_compoundCarbonateReactivity (chemistry)
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Non-isothermal thermogravimetry as an accelerated tool for the shelf-life prediction of paracetamol formulations

2021

Abstract In this work, non-isothermal thermogravimetric studies have been carried out on several paracetamol formulations with the aim to predict their shelf-lives under variable storage conditions. Specifically, paracetamol tablets of different brands have been investigated allowing to estimate their pharmaceutical quality by considering the specific drug stability. The proposed protocol is based on the kinetic study of thermogravimetric data by the combination of isoconversional procedures (Friedman and Kissinger-Akahira-Sunose (KAS) methods) and “Master plot” analysis. Accordingly, the kinetics of the paracetamol degradation is totally explored in terms of activation energy, pre-exponent…

Thermogravimetric analysisMaterials scienceShelf-lifeThermodynamicsExpiration date02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsShelf life01 natural sciencesIsothermal process010406 physical chemistry0104 chemical sciencesThermogravimetryDecay timeParacetamolIsoconversional methodsThermogravimetryPhysical and Theoretical Chemistry0210 nano-technologyInstrumentationSettore CHIM/02 - Chimica Fisica
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Il lavoro etero-organizzato prima e dopo il caso Foodora Italia.

2019

l contributo ripropone la discussione sull’esegesi della fattispecie disciplinata dall’art. 1 comma 2 del d. lgs. n. 81 del 2015 (nel testo anteriore alla riforma del 2019) trattata dall’autore nei Colloqui Giuridici sul Lavoro del 2015 (a cura) di Antonio Vallebona per il Massimario di Giurisprudenza del Lavoro. Lo studio rigettava la tesi che il lavoro organizzato dal committente fosse la terza fattispecie e anzi con riferimento delle condizioni di applicazio­ne dimostrava la necessità di una lettura includente. La conclusione era che la nuova disciplina aveva natura antifraudolenta e determinava un allargamento (relativo) dell’area della subordi­nazione conseguente alla riduzione del cam…

This article republishes (after the Italian Supreme Court judgement n.166/2020 on the Foodora Italia case) the contribution to the exegesis of the case brought by art. 1 para­graph 2 of the d. lgs. n. 81 of 2015 (in the text before the 2019 reform) delivered by the author in the 2015's "Colloqui Giuridici sul Lavoro" (edited) by Antonio Vallebona for the "Massimario di Giurisprudenza del Lavoro". The study rejected the thesis that the job organ­ised by the client was an intermediate regulation between the employee and the self-employed ones. Indeed regarding the conditions for its application it showed the need for extensive reading. The conclusion was that the new discipline was (and is) an anti-fraudulent one. It led to a (relative) expansion of the area ofsubordination as a consequence of a reduction in the scope of coordinated self-employed work. A little more than four years after that article the Italian Supreme Court (with the judgement n.166/2020) on the Foodora Italia case addresses for the first time the issue of the hetero-organised work (by art. 1 paragraph 2 of the d. lgs. n. 81 of 2015). The Supreme Court fully adheres to the paper's thesis. So in terms of the "re­medial" function of the standardthe nature of the organisation's specific conditionand eventually reducing the legal frame for coordinated work. The fact that the procedural matter dealt with the riders was (then and now is) utterly irrelevant for the correct interpretation of such a new provision. Giving to riders of the employee status is not an effect of the peculiarit­ies of the work through digital platforms. It is a consequence of the remedial nature of such a case-law.
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Qualità della didattica universitaria e sviluppo della capacità decisionale. Il modello ADVP per garantire i passaggi da L-19 a LM-85bis.

2020

Il presente contributo intende offrire una riflessione sulle competenze attese individuate attraverso la formulazione dei descrittori di Dublino dei CdS in Scienze dell’Educazione (L-19) e Scienze della Formazione Primaria (LM-85bis) istituiti presso l’Ateneo di Palermo e nello stesso tempo proporre un modello per lo sviluppo della maturità professional e necessaria a garantire scelte consapevoli, mature e responsabili. L’analisi condotta ci ha permesso, in una seconda fase di individuare gli obiettivi formativi finali scelti seguendo il modello proposto dalle Linee Guida dell ’Anvur, e di scegliere il modello dell’Activaction du Developpement Vocationnel et Personnel quale strumento per lo…

This paper offers a reflection on the expected competencies identified through the formulation of the Dublin descriptors of the CdS in Education Sciences (L-19) and Primary Education Sciences (LM-85bis) established at the University of Palermo and in the same time to propose a model for the development of professional maturity necessary to ensure informed mature and responsible choices. The analysis carried out allowed us in a second phase to identify the final training objectives chosen following the model proposed by the ANVUR Guidelines and to select the model of the Activaction du Developpement Vocationnel et Personnel for developing decision-making capacity that allows a conscious and responsible passage of students from course L-19 to course LM-85bis safeguarding the specific professional skills that young people wishing to dedicate themselves to teaching in primary and kindergarten must acquire.Settore M-PED/03 - Didattica E Pedagogia Speciale
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Why laparoscopists may opt for three-dimensional view: a summary of the full HTA report on 3D versus 2D laparoscopy by S.I.C.E. (Società Italiana di …

2018

Background Three-dimensional view in laparoscopic general, gynaecologic and urologic surgery is an efficient, safe and sustainable innovation. The present paper is an extract taken from a full health technology assessment report on three-dimensional vision technology compared with standard two-dimensional laparoscopic systems. Methods A health technology assessment approach was implemented in order to investigate all the economic, social, ethical and organisational implications related to the adoption of the innovative three-dimensional view. With the support of a multi-disciplinary team, composed of eight experts working in Italian hospitals and Universities, qualitative and quantitative d…

Three Dimensional Vision . Laparoscopy. Surgery- Health Technology assessment. Systemic ReviewTechnology Assessment BiomedicalHealth technology assessment Laparoscopy; Surgery Systematic review Three-dimensional visionOperative TimeSustainable innovationEndoscopic surgeryThree-dimensional vision03 medical and health sciencesImaging Three-DimensionalPostoperative Complications0302 clinical medicineEconomicaHumansUrologic surgeryMedicineHealth technology assessmentLaparoscopyDepth PerceptionMedical educationmedicine.diagnostic_testbusiness.industryHealth technologyMultiple-criteria decision analysisNew TechnologyHealth technology assessment; Laparoscopy; Surgery; Systematic review; Three-dimensional vision; SurgeryItaly030220 oncology & carcinogenesisCosts and Cost AnalysisSystematic review030211 gastroenterology & hepatologyHealth technology assessment; Laparoscopy; Surgery; Systematic review; Three-dimensional vision;LaparoscopySurgeryPatient SafetybusinessHealthcare providersPsychomotor PerformanceSystematic search
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