Search results for " dissipazione"
showing 9 items of 9 documents
Il principio di gerarchia delle resistenze capacity design
2012
The devastating effects generated by earthquakes occurred in different parts of the world have attract at a major interest in Earthquake Engineering. This branch of Structural Engineering studies the response and capacity of structural systems subjected to seismic actions, and develops design and prediction methods aimed at achieving adequate safety standards in presence of seismic events. A strategy used for the seismic prediction of RC structures, based on the capacity design of structural elements is the "hierarchy of strengths" (HS) principle. The paper shows how a proper use of the HS capacity design method can be included within the seismic design of RC structures achieving high level…
Robust stationary entanglement of two coupled qubits in independent environments
2009
The dissipative dynamics of two interacting qubits coupled to independent reservoirs at nonzero temperatures is investigated, paying special attention to the entanglement evolution. The counter-rotating terms in the qubit-qubit interaction give rise to stationary entanglement, traceable back to the ground state structure. The robustness of this entanglement against thermal noise is thoroughly analyzed, establishing that it can be detected at reasonable experimental temperatures. Some effects linked to a possible reservoir asymmetry are brought to light.
Criteri di dimensionamento delle rampe in pietrame
2006
DUTTILITÀ STRUTTURALE DI OPERE IN CALCESTRUZZO ARMATO
2012
Based on the new national territory seismic classification and on the current antiseismic regulations, the study and implementation of seismic-resistant structures, with sufficient capacity to plastic deformation to dissipate the seismic energy incoming, is crucial nowaday. This paper therefore addresses the study of ductility property of structures which can be obtained through appropriate deformation capacity of materials, sections and structural elements.
Risposta sismica di edifici prefabbricati isolati con dispositivi elastomerici
2013
The paper concerns the seismic behavior of precast concrete industrial buildings with an elevation equipped with seismic isolators. It’s examined a building with rectangular plan of m 40x 50. The structure is constituted of columns of square cross-section of 0.6 m, with continuum beams foundation. The desk is made with T section beams for each frame connected by Gerber joints in the main direction and they support precast pre-tensioned tiles with shape. A plate of concrete is casted of the wing tiles for obtain a connected rigid deck. At the top of the pillars will be placed rubber bearings having high dissipation capacity (HDRB). The dynamic behavior of the structure under recorded real …
Studio e progettazione di un sistema di smaltimento statico del calore
2012
Nell’ambito di questa attività sono stati svolti lo studio e la progettazione di un sistema di smaltimento statico del calore da adottare in accoppiamento con sistemi solari termici per evitare il rischio di stagnazione dovuto al mancato utilizzo dell’energia termica prodotta (bassa richiesta di energia termica, assenza dell’alimentazione elettrica). I componenti idraulici comunemente installati negli impianti solari ovvero vaso di espansione, valvole di sicurezza, sfiati e valvole di scarico termico garantiscono l’incolumità degli utilizzatori dai possibili problemi che nascono dall’aumento incontrollato di pressione e temperatura all’interno dell’impianto, ma possono portare ad un parzial…
Dissipative effects on a scheme of generation of a W state in an array of coupled Josephson junctions
2011
The dynamics of an open quantum system, consisting of three superconducting qubits interacting with independent reservoirs, is investigated to elucidate the effects of the environment on a unitary generation scheme of W states (Migliore R et al 2006 Phys. Rev. B 74 104503). To this end a microscopic master equation is constructed and its exact resolution predicts the generation of a Werner-like state instead of the W state. A comparison between our model and a more intuitive phenomenological model is also considered, in order to find the limits of the latter approach in the case of structured reservoirs.
Nonclassical correlations in superconducting circuits
2009
A key step on the road map to solid-state quantum information processing (and to a deeper understanding of many counterintuitive aspects of quantum mechanics) is the generation and manipulation of nonclassical correlations between different quantum systems. Within this framework, we analyze the possibility of generating maximally entangled states in a system of two superconducting flux qubits, as well as the effect of their own environments on the entanglement dynamics. The analysis reported here confirms that the phenomena of sudden birth and sudden death of the entanglement do not depend on the particular measure of the entanglement adopted.
L'acciaio nel restauro del Convento di S. Agostino a Corleone (PA)
2007
The paper describes the techniques adopted for the static and seismic retrofitting of the S. Agostino Convent in Corleone (PA), which is classified as II category seismic zone in the Italian Code. In this work many maintenances have been conducted with the use of inox steel and carbon steel. The main works consist in new decks, built with steel - concrete system, a new stair, two elevators and interventions in the masonry active ties with the use of stainless steel ribbons. This last method is named C.A.M.. A lot of details of the verification criteria and of the constructive solutions are showed.