Search results for "Ligne"
showing 10 items of 168 documents
Fonctionnement et dynamique des formes ligneuses au sein d'une exploitation agricole. Un raisonnement géo-agronomique
2004
International audience; Les changements dans les systèmes de production génèrent une réorganisation spatiale des pratiques au sein des exploitations agricoles. Celle-ci a un effet direct sur l’organisation du parcellaire. Face à cette dynamique se pose la question de l’évolution des formes ligneuses et aussi de leur rôle dans le fonctionnement d’exploitations modifiant leurs pratiques agricoles et leur système de production. À partir de l’étude d’une exploitation agricole, ce travail expose le double regard porté par le géographe et l’agronome sur la question de la place qu’occupe la végétation ligneuse et de son rôle sur le fonctionnement de l’exploitation.
Pulpiti lignei
2019
Questo catalogo nasce con l’intento di individuare, attraverso la circolazione di incisioni e di disegni, la fitta rete di relazioni che legano l’architettura prodotta tra Seicento e Settecento nel Val di Noto ad un contesto più ampio. Le incisioni costituirono per architetti e costruttori un apparato di forme da replicare o a cui ispirarsi, assumendo il ruolo ambasciatrici di un linguaggio destinato ad essere “condiviso” tra diverse aree culturali. Il catalogo ruota intorno a quarantuno materiali grafici (disegni e incisioni) provenienti da una collezione privata, integrati con riproduzioni e fotografie. L’organizzazione è suddivisa in nove sezioni tematiche diverse per scala e tipologie. …
Functional equations of the dilogarithm in motivic cohomology
2009
We prove relations between fractional linear cycles in Bloch's integral cubical higher Chow complex in codimension two of number fields, which correspond to functional equations of the dilogarithm. These relations suffice, as we shall demonstrate with a few examples, to write down enough relations in Bloch's integral higher Chow group CH^2(F,3) for certain number fields F to detect torsion cycles. Using the regulator map to Deligne cohomology, one can check the non-triviality of the torsion cycles thus obtained. Using this combination of methods, we obtain explicit higher Chow cycles generating the integral motivic cohomology groups of some number fields.
Hodge Theory and Algebraic Cycles
2006
Algebraic cycles and Hodge theory, in particular Chow groups, Deligne cohomology and the study of cycle class maps were some of the themes of the Schwerpunkt ”Globale Methoden in der Komplexen Geometrie”. In this survey we report about several projects around the structure of (higher) Chow groups CH(X,n) [3] which the author has studied with his coauthors during this time by using different methods. In my opinion there are two interesting view points: first the internal structure of higher Chow groups, i.e., the existence of interesting elements and nontriviality of parts of their Bloch-Beilinson filtrations. This case has arithmetic and geometric features, and the groups in question show d…
THE WOOD TRUSSES OF THE "RED HOUSE" IN PALERMO'S PARCO D'ORLEANS
2007
VEDI ARTICOLO COMPLETO
Rilassometria 1H-NMR per la caratterizzazione di legni integri e degradati
2006
La caratterizzazione del legno riveste un particolare ruolo negli studi volti alla conservazione di manufatti lignei di interesse storico-artistico-archeologico. Le proprietà meccaniche del legno dipendono dalla specie, dal contenuto d’acqua, dalla direzione delle fibre, dalla porosità, dalla distribuzione dei pori e, in generale, da un insieme di condizioni che non sempre sono facilmente misurabili e controllabili. Di particolare interesse sono i metodi di indagine non invasivi e non distruttivi; tra questi si sta affermando la Risonanza Magnetica Nucleare (NMR) [1,2]. In questo lavoro metodi di Rilassometria 1H-NMR, messi a punto per il tessuto osseo [3], sono stati applicati allo studio …
Developement of new techniques of Optimal Control in Quantum Dynamics : from nuclear magnetic resonance to molecular physics
2011
The goal of this thesis is to apply the optimal control theory to the dynamics of quantum systems.The first part aim at introducing the tools of optimal control in quantum control which were initially developedin mathematics. This approch has been applied on different kinds of quantum system with small and largedimensions. The first part of this manuscript introduces the optimal control tools which are used with a pointof view suited to a public of physicists. In the second part these techniques are used to control the dynamics ofspins in NMR and MRI. The third part deals with the development of new iterative algorithms applied to thecontrol by laser fields of the rotational dynamics of lin…
Info-communicationnal approach of medical cannabis self-medication : analysis of figures mobilized in knowledge legitimation within a community dedic…
2022
This thesis proposes an infocommunicational approach to self-medication with medical cannabis. We question the logic of knowledge legitimization in a context where the coercive power of the French state is exercised. We seek to understand how the use of cannabis is determined in a radically constrained legislative framework, for users in a recreational or self-medication approach, but also for doctors and patients in a medical approach. To do this, we analyze the processes of knowledge legitimization that allow the development of practical know-how allowing individuals to consume cannabis in a self-medication approach within clandestine health communities of practice, supported by participa…