Search results for "POSS"

showing 10 items of 345 documents

Viva voce: Voice and Voicelessness among Twelfth-Century Clerics

2015

Writing in his Summa on Gratian’s Decretum1 toward 1164, canonist Rufinus of Bologna2 evokes criminal prelates, saying, “vocem accusandi, reprehendi, docendi non habent” (they do not have a voice to accuse, punish, teach).3 Should this enumeration be understood as a commonplace statement about three possible functions of the voice, or should we suspect a set of deeper associations? Is Rufinus’s use of the word “voice” simply an alternative to other rhetorical or stylistic possibilities—such as the word “word” in particular—or is it truly a deliberate choice on the part of the canonist?

Moyen ÂgeHistory[ SHS.HIST ] Humanities and Social Sciences/HistoryStatement (logic)05 social sciences0507 social and economic geography06 humanities and the arts16. Peace & justice050701 cultural studiesLinguisticsfilm.subject060104 historyHistoirefilm[SHS.HIST] Humanities and Social Sciences/HistoryRhetorical questionPastoral careDemonic Possession0601 history and archaeologySuspectSet (psychology)[SHS.HIST]Humanities and Social Sciences/HistoryWord (computer architecture)VoicelessnessComputingMilieux_MISCELLANEOUS
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LA CHLAMYDIA PNEUMONIAE È CORRELABILE CON LA ROTTURA DELLA PLACCA ATEROSCLEROTICA? RUPTURE OF THE ATHEROSCLEROTIC PLAQUE: IS CHLAMYDIA PNEUMONIAE A P…

2006

Background. The natural history of atherosclerosis has not clearly been elucidated yet. Some works reported that flogosis plays a role in plaque instability. Why does this inflammatory process start? We investigated the correlation between Chlamydia pneumoniae acute infection and plaque rupture. Methods. We compared blood concentrations of IgM anti-Chlamydia pneumoniae in patients affected by acute myocardial infarction (AMI) and in patients affected by stable angina. Results. Our results showed a minimal statistical difference, with a more positive value in patients with AMI. Subsequently, the group affected by AMI was divided into two subgroups with and without plaque rupture: the subgrou…

Myocardial infarctionAtherosclerosiChlamydia pneumoniaeImmunoglobulinLA CHLAMYDIA PNEUMONIAE È CORRELABILE CON LA ROTTURA DELLA PLACCA ATEROSCLEROTICA? RUPTURE OF THE ATHEROSCLEROTIC PLAQUE: IS CHLAMYDIA PNEUMONIAE A POSSIBLE AGENT?Plaque rupture.
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UV-stabilisation of polystyrene-based nanocomposites provided by polyhedral oligomeric silsesquioxanes (POSS)

2012

Abstract The photo-ageing behaviour of Polyhedral Oligomeric SilSequioxane (POSS)-polystyrene (PS) nanocomposites has been investigated for the first time. POSS having different inorganic framework and pendant organic groups have been used in the PS nanocomposite preparation and the formulated films were subjected to accelerated weathering. Compared to pristine PS, the POSS-containing PS developed a lower level of carbonyl and hydroxyl groups as a function of the exposure time, indicating a significantly improved resistance of the nanocomposites to photo-degradation. The results suggest that all of the investigated POSS molecules play a protective role and may extend the in-use lifetime of …

NanocompositeMaterials scienceMorphology (linguistics)Polymers and PlasticsPolymeric matrixMolecular silicaPOSS nanofillerCondensed Matter Physicschemistry.chemical_compoundchemistryMechanics of MaterialsPolymer chemistryMaterials ChemistryPhoto-oxidationMoleculePolystyreneDispersion (chemistry)PolystyreneUV-stabilizersPolymer Degradation and Stability
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On the role of multi-functional polyhedral oligomeric silsesquioxane in polystyrene-zinc oxide nanocomposites

2014

Abstract Multi-functional trisilanol phenyl (TSPH) and trisilanol isobutyl (TSIB) polyhedral oligomeric silsesquioxane (POSS) have been used in the formulation of advanced polystyrene (PS)-zinc oxide (ZnO) nanocomposites. The neat matrix and PS/ZnO-based nanocomposites have been characterized through rheological, morphological, mechanical, and dynamic thermo-mechanical analysis. Both TSPH and TSIB are able to improve the dispersion of ZnO into the polystyrene matrix; furthermore, adding TSIB leads to better results because it facilitates better solubility into the PS matrix and interaction/reaction with the ZnO nanopowder. Finally, the optical properties and photo-oxidative resistance of th…

NanocompositeMaterials sciencePolymers and PlasticsnanocompositeGeneral Chemical Engineeringdispersant agentMetals and Alloyschemistry.chemical_elementZincSilsesquioxanechemistry.chemical_compounddispersant agent; nanocomposites; photo-oxidative resistance; POSS; UV shielding; Chemical Engineering (all); Polymers and Plastics; Materials Chemistry; 2506; Metals and AlloysUV shieldingchemistryphoto-oxidative resistancePolymer chemistrynanocompositesMaterials ChemistryChemical Engineering (all)Polystyrene2506POSS
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Nanocompositi a base polimerica e molecole POSS: comportamento reologico e proprietà fisiche

2012

Nanocomposites based on PS, PE, or ethylene-acrylic acid (ESCOR 5001) and POSS (Polyhedral oligomeric SilseSquioxanes) molecules were prepared by melt mixing. The nanocomposites’s structure-property relationships were analyzed mainly by rheological investigations and the variations with respect to the matrices were highlighted. The results of the rheological analysis show that the POSS molecules affect the properties in the molten state and act as plasticizer that is contrasted by the hydrogen bonds. The inorganic cage’s structure and the organic nature of the vertex groups of the molecules POSS play an important role in modulating the dispersion and in determining the final properties of t…

Nanocomposites POSS molecules rheological behavior plasticizer antiplasticizer.
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Preparazione e caratterizzazione di compositi polimerici funzionali a base di nanostrutture carboniose

Obiettivo di questo lavoro è la realizzazione di materiali nanocompositi polimerici utilizzando come matrice la resina epossidica commerciale Epikote828 e come filler nanotubi di carbonio (CNT) e nanoplacchette di grafene (GNP) e la caratterizzazione funzionale per applicarli come schermi per interferenze elettromagnetiche. Per correlare le proprietà funzionali alle proprietà morfologico-strutturali, i materiali sono stati analizzati mediante microscopia acustica a scansione (SAM) per valutare la dispersione del filler, spettroscopia Raman e per verificare risonanza magnetica nucleare in stato solido (ss-NMR) per studiare le interazioni filler-matrice e test di nanoindentazione per studiare…

Nanocompositi; nanotubi di carbonio; nanoplacchette di grafene; proprietà strutturali; proprietà elettromagnetiche; schermatura elettromagnetica; resine epossidicheproprietà strutturalischermatura elettromagneticaNanocompositiresine epossidichenanotubi di carbonionanoplacchette di grafeneproprietà elettromagneticheSettore CHIM/02 - Chimica Fisica
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Créanciers munis de sûretés. Un banquier bénéficiaire d'un cautionnement et d'un nantissement sur le matériel et l'outillage commet une faute envers …

2005

International audience; (Cass. Ch. mixte, 10 juin 2005, Banque Hervet c/ Lemaitre , pourvoi n° 02-21.296, arrêt n° 233 FS-P+B+I, D. 2005.1773, obs. X. Delpech et 2020, note S. Piedelièvre)

Nantisement[SHS.DROIT]Humanities and Social Sciences/LawCaution[SHS.DROIT] Humanities and Social Sciences/LawSubrogation impossibleFait du créancierREDRESSEMENT ET LIQUIDATION JUDICIAIRESFait exclusifMainlevéeCAUTIONNEMENTExtinctionCréancier muni d'une sûreté
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Viaggi nell’immaginario: il turismo virtuale nel sito UNESCO di Tarragona

2023

Le nuove tecnologie hanno trasformato in modo radicale non solo la geografia come disciplina, ma anche le geografie del mondo. Il digitale ha assunto, infatti, un ruolo di mediazione sempre più pervasivo nella produzione dello spazio, come delle conoscenze e degli immaginari geografici. Le possibilità offerte dal virtuale, in particolare, offrono oggi un contributo decisivo nella comunicazione dei significati attribuiti ai luoghi e rispondono in modo sempre più efficace ai bisogni emergenti del settore turistico. Le esperienze di visita mediate dal digitale mirano a coinvolgere i sensi e risultano efficaci quando promuovono immersioni rigorosamente realistiche. Nel quadro di queste riflessi…

New technologies have radically transformed not only geography as a discipline but also the geographies of the world. Indeed the digital has assumed an increasingly pervasive mediating role in the production of space as of geographic knowledge and imaginaries. The possibilities offered by the virtual in particular now offer a decisive contribution in communicating the meanings attributed to places and respond increasingly effectively to the emerging needs of the tourism sector. Digitally mediated visitor experiences aim to engage the senses and are effective when they promote rigorously realistic immersions. Within the framework of these reflections the paper highlights the renewed relevance of authenticity both of the tourism experience and of cultural heritage in relation to its potential for attraction and proposes a contextualization of the theme in light of the unprecedented opportunities granted by technologies for the creation of virtual and augmented spaces. The proposed discussion is therefore also a journey aimed at exploring authenticity as a tool through which new technologies can effectively mediate a sense of place and foster brand communication of a destination. The case study is the UNESCO site of Tarragona whose most relevant image for urban policies is presented. This shared figuration spatially defined and rooted in a precise historical moment is reconstructed on the one hand through the analysis of functional documentation for the candidacy and on the other by means of a review of mobile applications developed for the promotion of the city's cultural heritage. The proposed journey and exploration of the place return in light of the research data and in conclusion the central role played by digital technologies in mediating the UNESCO imaginary. The forms of virtual tourism in Tarragona confirm that to travel is to experience a text enveloped in time and inscribed in space.Settore M-GGR/01 - Geografia
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A precise measurement of the Z resonance parameters through its hadronic decays

1990

A measurement of the cross section for e+e-→ hadrons using 11 000 hadronic decays of the Z boson at ten different center-of-mass energies is presented. A three-parameter fit gives the following values for the Z mass MZ, the total width ΓZ, the product of the electronic and hadronic partial widths ΓeΓh, and the unfolded pole cross section σ0: MZ = 91.171 ± 0.030 (stat.) ± 0.030 (beam) GeV, ΓZ = 2.511 ± 0.065 GeV, ΓeΓh = 0.148 ± 0.006 (stat.) ± 0.004 (syst.) GeV2, σ0 = 41.6 ± 0.7 (stat.) ± 1.1 (syst.) nb, Good agreement with the predictions of the standard model is observed. From a two-parameter fit the number of massless neutrino generations is found to be Nv = 2.91 ± 0.26. Thus the hypothes…

Nuclear and High Energy PhysicsParticle physics[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]pragmatismtruthElectron–positron annihilationHadronfictionpossible worlds01 natural sciencesResonance (particle physics)webStandard ModelRDFNuclear physicsCross section (physics)semantic webesthetics0103 physical sciencesmemetic[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsNuclear Experimentmetalanguagemodal logicPhysicsInternet010308 nuclear & particles physicstrust3. Good healthMassless particlePhysique des particules élémentairesHigh Energy Physics::ExperimentFísica nuclearNeutrinoBeam (structure)Particle Physics - Experiment
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Cultural institutions as agents of urban and community regeneration in the (post-)pandemic city. The case of the «Laboratorio Zen Insieme» in Palermo

2022

Although all cities in the world have been affected by the COVID-19 pandemic, its impacts on the territories, yet to be understood, are unevenly distributed, revealing extremely varied imbalances depending on the places. However, it is clear that the virus and its variants have aggravated pre-existing socio-spatial inequalities, creating new ones and bringing attention back to those implications between space, planning, public health and citizenship that are at the origins of contemporary urbanism. In a reference framework in which the crisis is globalized but unequal and in the absence of a welfare system capable of responding to the urgencies of the most marginalized social contexts and g…

Olsen 2018Settore ICAR/21 - UrbanisticaSettore M-GGR/01 - GeografiaSacco and Blessi 2009). In the current (post-) pandemic context and through the lens of a southern European perspective the purpose of this article is to critically reflect about the role of culture as possible vehicle of urban and community regeneration. In particular we will focus on the activities of the no profit organization «Laboratorio Zen Insieme» in ZEN2 one of the last large popular and peripheral neighborhoods built in Palermo at the end of 80s in order to explore and understand how cultural practices work as agent of urban and social transformation capable of addressing emerging issues especially in the pandemic scenario we are experiencing. Thecasestudy has been conducted through analysis of documents participative observations (Honer and Hitzler 2015) and qualitative in-depth interviews with key actors involved in the conception organization and management of the activities carried out by Laboratorio Zen Insieme with representatives of local institutions and non-formal conversations with participants of the workshops heldin the neighborhood. The experience we narrate finds that cultural practices have re-conceptualized their design and functions as strategies of urban and community regeneration and at the same time have contributed to answer to emergent issues in developing proximity and local based strategies facing up to problems inherent civil rights educationalpoverty socio-spatial justice and have changed the image and identity of urban places they inhabit.In this sense the research provides a framework for development of strategies and legitimization for cultural practices and a point of discussionabouttheirrolein urban development.Although all cities in the world have been affected by the COVID-19 pandemic its impacts on the territories yet to be understood are unevenly distributed revealing extremely varied imbalances depending on the places. However it is clear that the virus and its variants have aggravated pre-existing socio-spatial inequalities creating new ones and bringing attention back to those implications between space planning public health and citizenship that are at the origins of contemporary urbanism. In a reference framework in which the crisis is globalized but unequal and in the absence of a welfare system capable of responding to the urgencies of the most marginalized social contexts and groups a response to the new social and individual needs has been offered by cultural institutions that play a role of territorial agency often independently or in the absence of political institutions. Far from the idea of entertainment and divertissement it is in fact increasingly clear how the practices of cultural innovation experimenting with various forms of action and participation can in some cases play a fundamental role in the processes of social cohesion and community building representing an antidote to the worsening of the phenomena of marginalization and socio-spatial inequalities within cities and territories (Colantonio and Dixon 2011
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