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[null,"1.","Record Nr.",null,"UNINA9910705084203321"]
[null,null,"Autore",null,"Bouche Karl"]
[null,null,"Titolo",null,"Les habitats carolingiens de Montours et La Chapelle-Saint-Aubert (Ille-et-Vilaine) / / Isabelle Catteddu"]
[null,null,"Pubbl/distr/stampa",null,"Paris, : Éditions de la Maison des sciences de l’homme, 2021"]
[null,null,"ISBN",null,"2-7351-2637-4"]
[null,null,"Descrizione fisica",null,"1 online resource (235 p.)"]
[null,null,"Soggetti",null,"Archaeology"]
[{"$nulls":4},"habitat rural"]
[{"$nulls":4},"zone humide"]
[{"$nulls":4},"gué"]
[{"$nulls":4},"four"]
[{"$nulls":4},"parcellaire"]
[{"$nulls":4},"silo"]
[{"$nulls":4},"haut Moyen Âge"]
[{"$nulls":4},"avoine"]
[{"$nulls":4},"sablière"]
[{"$nulls":4},"solin"]
[null,null,"Lingua di pubblicazione",null,"Francese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Sommario/riassunto","Quatre sites ruraux du haut Moyen Âge ont été fouillés dans la région de Fougères lors des opérations d’archéologie préventive conduites de 1995 à 1997 sur le tracé de l’autoroute des Estuaires (A84).  La contemporanéité de ces gisements a conduit, d’emblée, à harmoniser les problématiques et à accorder une part importante à l’approche paléoenvironnementale ainsi qu’à l’analyse du mobilier céramique. L’étude des trois ensembles d’habitats et d’un gué carolingiens laisse entrevoir une gestion organisée et dynamique des terroirs environnants (parcellaire, réseaux fossoyés, chemins, aménagement d’un fond de vallon tourbeux...) qui ont été structurés et exploités entre le XIIe et le Xe s.  Parallèlement à la contribution que cette synthèse apporte à la connaissance de l’habitat et du mode de vie dans les campagnes bretonnes au haut Moyen Âge, domaine encore peu abordé par l’archéologie, les données bioarchéologiques précisent l’impact des "]
[{"$nulls":4},"activités agro-pastorales sur l’évolution du milieu végétal et du paysage.  From 1995 to 1997, four early medieval sites were excavated in the Fougères region as part of archaeological research work carried out prior to the construction of the A84 motarway. As the sites all date from the same period, a comprehensive research plan was implemented from the outset, with special emphasis on paleo-environmental analysis and examination of pottery finds.  Examination of the three Carolingian settlement sites, as well as a ford from the same period, reveals an organised, interactive approach to environmental management of the surrounding lands (land division, ditch Systems. tracks, development of a peatcovered valley floor), which were developed and systematically exploited from the 7th to 10th century.  The present volume provides a significant contribution to our understanding of early medieval rural settlements in Brittany, an area of study which has hitherto received little attention from archaeologists The research is enhanced by an…"]
[null,"2.","Record Nr.",null,"UNINA9910137375403321"]
[null,null,"Autore",null,"Strocchi Franco"]
[null,null,"Titolo",null,"Gauge Invariance and Weyl-polymer Quantization / / by Franco Strocchi"]
[null,null,"Pubbl/distr/stampa",null,"Cham : , : Springer International Publishing : , : Imprint : Springer, , 2016"]
[null,null,"ISBN",null,"3-319-17695-1"]
[null,null,"Edizione",null,"[1st ed. 2016.]"]
[null,null,"Descrizione fisica",null,"1 online resource (X, 97 p.)"]
[null,null,"Collana",null,"Lecture Notes in Physics, , 0075-8450 ; ; 904"]
[null,null,"Disciplina",null,"530.143"]
[null,null,"Soggetti",null,"Quantum theory"]
[{"$nulls":4},"Mathematical physics"]
[{"$nulls":4},"Quantum field theory"]
[{"$nulls":4},"String models"]
[{"$nulls":4},"Particles (Nuclear physics)"]
[{"$nulls":4},"Quantum Physics"]
[{"$nulls":4},"Mathematical Physics"]
[{"$nulls":4},"Quantum Field Theories, String Theory"]
[{"$nulls":4},"Elementary Particles, Quantum Field Theory"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Bibliographic Level Mode of Issuance: Monograph"]
[null,null,null,"Nota di bibliografia","Includes bibliographical references and index."]
[null,null,"Nota di contenuto",null,"Introduction -- Heisenberg quantization and Weyl quantization -- Delocalization, gauge invariance and non-regular representations -- Quantum mechanical gauge models -- Non-regular representations in quantum field theory -- Diffeomorphism invariance and Weyl polymer quantization -- A generalization of Stone-von Neumann theorem.-  Bibliography -- Index."]
[null,null,null,"Sommario/riassunto","The book gives an introduction to Weyl non-regular quantization suitable for the description of physically interesting quantum systems, where the traditional Dirac-Heisenberg quantization is not applicable.  The latter implicitly assumes that the canonical variables describe observables, entailing necessarily the regularity of their exponentials (Weyl operators). However, in physically interesting cases -- typically in the presence of a gauge symmetry -- non-observable canonical variables are introduced for the description of the states, namely of the relevant representations of the observable algebra. In general, a gauge invariant ground state defines a non-regular representation of the gauge dependent Weyl operators, providing a "]
[{"$nulls":4},"mathematically consistent treatment of familiar quantum systems -- such as the electron in a periodic potential (Bloch electron), the Quantum Hall electron, or the quantum particle on a circle -- where the gauge transformations are, respectively, the lattice translations, the magnetic translations and the rotations of 2π. Relevant examples are also provided by quantum gauge field theory models, in particular by the temporal gauge of Quantum Electrodynamics, avoiding the conflict between the Gauss law constraint and the Dirac-Heisenberg canonical quantization. The same applies to Quantum Chromodynamics, where the non-regular quantization of the temporal gauge provides a simple solution of the U(1) problem and a simple link between the vacuum structure and the topology of the gauge group. Last but not least, Weyl non-regular quantization is briefly discussed from the perspective of the so-called polymer representations proposed for Loop Quantum Gravity in connection with diffeomorphism invariant vacuum states."]