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showing 10 items of 3756 documents

La Seconda Vita dell'Ambiente Costruito

2021

Il contributo inquadra i saggi, gli studi, le ricerche e progetti pubblicati sul numero 9 di AGATHÓN su ‘La Seconda Vita dell’Ambiente Costruito’, tema di interesse per il mondo accademico, delle professioni e dell’industria. Cambiamenti climatici, eccessivo consumo di suolo e di risorse non rinnovabili, produzione sempre crescente di rifiuti, emergenza pandemica e crisi socio-economica globale sono entrati di fatto nel nostro quotidiano: seppur drammatiche, per certi versi, tali questioni possono essere colte come un’opportunità per ripensare il modo e il mondo in cui viviamo. In questo contesto di ‘rivoluzione’(Floridi, 2020) e di ‘policrisi’ (Losasso, 2020), e con riferimento specifico a…

The contribution frames the essays studies research and projects published in issue 9 of AGATHÓN on ‘The SecondLife of the Built Environment’ an interesting topic for universities businesses and industry. Climate changes excessive use of soil renewable resources ever-increasing production of waste the current pandemic emergency and the global socio-economic crisis have in fact entered our daily life. Even if these are tragic issues they can be somehow seized as an opportunity to rethink the way we live and our world. In this ‘revolutionary’ (Floridi 2020) and ‘polycrisis’ (Losasso 2020) context specifically referring to the building industry the Academy the Research and Industry worlds are called to give answers – based on sustainability and the principles of the Green Deal but also and mostly of the new Bauhaus – that can encourage reconsiderations and re-orientations of processes and products new projects on places buildings objects and materials able to positively affect the governance of the global change that our planet and humanity need able to give a ‘new life’ to the built and/or transformed environment at any scaleSettore ICAR/12 - Tecnologia Dell'Architettura
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Non solo Platone. Il primato dell'oralità nel retore Alcidamante

2020

Il saggio è dedicato all’orazione Sugli autori dei discorsi scritti o sui sofisti, attribuita al retore Alcidamante, discepolo di Gorgia e attivo in Atene tra il 410 e il 365 a.C. Argomento dell’orazione è il serrato confronto tra due differenti modalità oratorie, l’autoschediazein (“parlare a braccio”) — cui Alcidamente accorda una netta superiorità — e il "gegrammena legein (“pronunciare discorsi scritti”). L’interesse di questo testo (databile con buona approssimazione intorno al 390 a. C) consiste essenzialmente nel rappresentare un punto di vista specificamente retorico sulla questione delle differenze tra scritto e parlato. Nonostante alcune significative convergenze con il ben più ce…

The essay focuses on the speech “Perì Sophiston” (Concerning Sophists) attributed to Alcidamas a rhetorician who was pupil of Gorgias and thought in Athens between 410 and 365 BC. In this speech Alcidamas stresses the superiority of extempore (though prepared) speeches over written one. The speech is particularly interesting because it represents the specifically rhetorical point of view on the issue of the differences between written and spoken word. The essay underlines the originality of Alcidamas (especially compared to Plato) and his interest also in the contemporary debate on the differences between written and spoken.Settore M-FIL/05 - Filosofia E Teoria Dei Linguaggi
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Rapid and eco-friendly synthesis of graphene oxide-silica nanohybrids

2014

The increasing interest in Graphene oxide (GO) is due to many issues: the presence of both sp2-conjugated atoms and oxygen-containing functional groups provides a strong hydrophilicity and the possibility to further functionalize it with other molecules (i.e. π-π interactions covalent attachment etc.) [1]. Furthermore since the GO is biocompatible and noncytotoxic many studies have been recently focused on the development of GO-based nanodevices for bioimaging DNA detection drug delivery. Due to their low cytotoxicity and large internal surface area silica nanoparticles have been taken into account as promising material for biolabeling and drug loading/delivery. Particular consideration has recently been demonstrated for GO-silica composites because of the potentialities for electrical applications their chemical inertia and stability toward ions exposure. The possibility to combine the extraordinary properties of GO and silica offers several advantages for the realization of nanoprobes for biological applications and of biosensor [12]. The strategy for the fabrication of GO-nanosilica nanohybrids can be schematized as follows: (i) synthesis of GO by oxidizing graphite powder with the method described by Marcano et al. [3] (ii) Preparation of oxygen-loaded silica nanoparticles by thermal treatments in controlled atmosphere in order to induce high NIR emission at 1272 nm from high purity silica nanoparticles. (iii) preparation of GrO-silica nanohybrid films via rapid solvent casting in water. The nanohybrids were tested by XPS FTIR Raman analysis UV photoluminescence analysis TGA Zeta potential measurements electrical tests AFM and SEM. Several nanohybrids were prepared by combining two different typologies of GO and two different samples of silica.
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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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Tommaso Maria Napoli Utriusque Architecturae Compendium Roma 1688 Breve trattato sulle fabbriche civili e militari e la conservazione delle architett…

2013

Il volume Tommaso Maria Napoli Utriusque Architecturae Compendium Roma 1688 Breve trattato sulle fabbriche civili e militari e la conservazione delle architetture del frate domenicano Tommaso Maria Napoli, vuole contribuire ad accrescere le nostre conoscenze sui principi che dovevano sottendere alla realizzazione dell’architettura civile e militare del periodo barocco e tardo barocco, così come espressi nel breve trattato scritto dal frate architetto, nato a Palermo, Tommaso Maria Napoli (1659-1725), e pubblicato a Roma alla fine del Seicento. Alla traduzione dal latino del trattato, redatta da esperti (Fabio Zarbo e Pietro Zarbo), è inclusa un’interessante ricerca, redatta congiuntamente c…

The volume Tommaso Maria Napoli Utriusque Architecturae Brief Compendium 1688 Rome treaty on civil and military factories and preservation of the architecture of the Dominican friar Tommaso Maria Napoli wants to help increase our understanding of the principles that should underpin the realization of civil and military baroque and late baroque period as expressed in the short treatise written by the monk architect born in Palermo Tommaso Maria Napoli (1659-1725) and published in Rome at the end of the seventeenth century. This translation from the Latin of the treaty drawn up by experts (Fabio Zarbo e Pietro Zarbo) included is an interesting research drafted jointly with Giuseppe Tantillo status of some of the architecture without realizing or attributed to the architect Tommaso Maria Napoli. In fact some cards are attached to the volume on the substance and state of preservation of the cathedral of the Assumption of Mary in Dubrovnik (Croatia) of the villas Valguarnera and Palagonia in Bagheria (near Palermo Italy) of the monument to the Immaculate and one of the towers of the church of San Domenico in Palermo (Italy). The volume is enriched by the presentation and afterword by Francesco Tomaselli that among other things starting from the definition of Restoration expressed by Tommaso Maria Napoli in his book presents a stimulating reflection on the meaning of Restoration. The essay Tommaso Maria Napoli Utriusque Architecturae Compendium 1688 ... is the first of the series Monument Document for the conservation of the architectural heritage and environment: Theory knowledge interventions publisher Aracne in Rome with director Francesco Tomaselli and with Comittee Scientific and editorial international.Settore ICAR/19 - Restauro
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Retail pricing decisions and product category competitive structure

2010

This study addresses the use of demand forecasting techniques by retailers to support their decision making. Specifically, the authors propose a pricing decision support model for retailers to estimate optimal prices, whose output depends on the configuration of a supporting measurement model. The measurement model is a demand function that relates sales and prices within the category; optimal prices are those whose effects on demand and retail margins maximize the category's profitability. This investigation focuses particularly on the role of competitive structure, such that the authors consider two types of price competition asymmetries for demand forecasting: those depending on the bran…

TheoryofComputation_MISCELLANEOUSProduct categoryDecision support systemInformation Systems and ManagementDemand forecastingManagement Information SystemsMicroeconomicsCompetition (economics)Arts and Humanities (miscellaneous)Demand curveCategory managementDevelopmental and Educational PsychologyEconomicsProfitability indexMarketingInformation SystemsOptimal decisionDecision Support Systems
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Characterization of thermoelectric and thermogravimetric properties of conductive PEDOT:PSS films blended with SWCNTs and PVA

2019

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was blended with polyvinyl alcohol (PVA) and single-walled carbon nanotube (SWCNT) filler to form composites with thermoelectric properties. Studied samples were obtained by drop coating and solution casting methods. Thermoelectric measurements of PEDOT:PSS demonstrated that the addition of 5 wt. % SWCNTs increased the Seebeck coefficient value from 8.0 μV/K to 23.6 μV/K, while in the case of PEDOT:PSS/PVA blended with 5 wt. % SWCNT Seebeck coefficient value of 20.3 μV/K was achieved. Thermogravimetric analysis showed slight SWCNT effect on thermal stability of the investigated systems.

Thermogravimetric analysisMaterials science02 engineering and technologyCarbon nanotube010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesPolyvinyl alcoholCasting0104 chemical scienceslaw.inventionchemistry.chemical_compoundchemistryPEDOT:PSSChemical engineeringlawSeebeck coefficientThermoelectric effectThermal stability0210 nano-technologyIOP Conference Series: Materials Science and Engineering
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Influence of the Preparation Method and Photo-Oxidation Treatment on the Thermal and Gas Transport Properties of Dense Films Based on a Poly(ether-bl…

2018

Dense films based on the hydrophobic Pebax&reg

Thermogravimetric analysisMaterials scienceCompression molding02 engineering and technology010402 general chemistryMass spectrometrylcsh:Technology01 natural sciencesArticleContact angleDifferential scanning calorimetryGeneral Materials Sciencelcsh:Microscopylcsh:QC120-168.85lcsh:QH201-278.5lcsh:TPermeation021001 nanoscience & nanotechnologyMicrostructureCastingphoto-oxidation0104 chemical sciencesChemical engineeringlcsh:TA1-2040poly(ether-block-amide) copolymerlcsh:Descriptive and experimental mechanicslcsh:Electrical engineering. Electronics. Nuclear engineeringlcsh:Engineering (General). Civil engineering (General)0210 nano-technologylcsh:TK1-9971gas transport propertiesMaterials
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Preparation, characterization and in vitro test of composites poly-lactic acid/hydroxyapatite scaffolds for bone tissue engineering.

2018

Abstract In this work, the possibility to produce composite Poly-L-lactic acid (PLLA)/Hydroxyapatite (HA) porous scaffolds via Thermally Induced Phase Separation (TIPS) for bone tissue engineering applications was investigated. Several PLLA/HA wt/wt ratios (95/5, 90/10, 70/30, 50/50, 34/66) were tested and the as-obtained scaffolds were characterized via Scanning Electron Microscopy, Wide Angle X-Ray Diffraction, Thermogravimetric analysis, Gas Pycnometry, Differential Scanning Calorimetry and mechanical compression test. Morphological analysis revealed an open structure with interconnected pores and HA particles embedded in the polymer matrix. Finally, cell cultures were carried out into t…

Thermogravimetric analysisMaterials scienceScanning electron microscopeCell SurvivalPolyestersComposite numberPolyesterBiocompatible Materials02 engineering and technologyMatrix (biology)010402 general chemistry01 natural sciencesBiochemistryBone and BonesHydroxyapatiteCell LineScaffoldMiceDifferential scanning calorimetryTissue ScaffoldTissue engineeringStructural BiologyMaterials TestingAnimalsMolecular BiologyMechanical PhenomenaBiocompatible Materialchemistry.chemical_classificationOsteoblastsCalorimetry Differential ScanningTissue EngineeringTissue ScaffoldsAnimalOsteoblastBiomarkerGeneral MedicinePolymer021001 nanoscience & nanotechnology0104 chemical sciencesPolyesterDurapatiteChemical engineeringchemistryThermogravimetry0210 nano-technologyPorosityBiomarkersBone and BoneInternational journal of biological macromolecules
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Pigment organization and energy transfer dynamics in isolated photosystem I (PSI) complexes from Arabidopsis thaliana depleted of the PSI-G, PSI-K, P…

2002

Abstract Green plant photosystem I (PSI) consists of at least 18 different protein subunits. The roles of some of these protein subunits are not well known, in particular those that do not occur in the well characterized PSI complexes from cyanobacteria. We investigated the spectroscopic properties and excited-state dynamics of isolated PSI-200 particles from wild-type and mutant Arabidopsis thaliana plants devoid of the PSI-G, PSI-K, PSI-L, or PSI-N subunit. Pigment analysis and a comparison of the 5K absorption spectra of the various particles suggests that the PSI-L and PSI-H subunits together bind approximately five chlorophyll a molecules with absorption maxima near 688 and 667nm, that…

Time FactorsAbsorption spectroscopyProtein subunitPhotosynthetic Reaction Center Complex ProteinsArabidopsisLight-Harvesting Protein ComplexesBiophysicsBiologyPhotosystem Ichemistry.chemical_compoundPhase (matter)MoleculePlant ProteinsQuantitative Biology::BiomoleculesPhotosystem I Protein ComplexTemperaturePigments Biologicalbeta CaroteneFluorescenceKineticsCrystallographySpectrometry FluorescenceEnergy TransferchemistryChlorophyllThermodynamicsHigh Energy Physics::ExperimentAbsorption (chemistry)Research Article
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