Search results for "ESA"
showing 10 items of 11914 documents
L’autonomia di spesa delle Regioni fra Stato ed Unione europea dalla l. cost. 3/2001 alle condizionalità europee sulla ripresa e la resilienza
2021
L'articolo ricostruisce la tendenza all’accentramento nel governo delle finanze pubbliche e l’eccessiva distanza fra testo costituzionale e diritto costituzionale vivente per analizzare l'attuazione del Recovery Plan (PNRR) rilevando un ulteriore tendenza all’accentramento del governo della spesa. Si indagano dunque le ragioni della compressione dell’autonomia finanziaria di spesa per effetto del principio di indifferenza e del “doppio intreccio federale”. Si mira a inquadrare il tema alla luce della leale collaborazione e dellala resilienza istituzionale per accorciare la “distanza” fra testo costituzionale ed attuazione costituzionale in tema di autonomia di spesa delle Regioni. Si prospe…
Fasti seicenteschi nella scrittura di Gesualdo Bufalino
2009
Il saggio esamina le peculiarità del barocco dissonante di Gesualdo Bufalino. In Bufalino l’artificio dello stile sottende una tensione ideologica. L’intensità espressiva e l’eccesso verbale cercano di compensare un vuoto e costituiscono, nel sentire dello scrittore, un formidabile mezzo «per contrastare l’ossificazione del mondo». Bufalino rivendica quindi il valore strutturale della propria scelta barocca, dichiarando che la sua scrittura è sorretta da un «barocco borrominiano» in cui «l’ornato è funzione», in mancanza del quale «l’architettura cadrebbe».
A first-principles DFT study of UN bulk and (001) surface: comparative LCAO and PW calculations.
2008
LCAO and PW DFT calculations of the lattice constant, bulk modulus, cohesive energy, charge distribu- tion, band structure, and DOS for UN single crystal are analyzed. It is demonstrated that a choice of the uranium atom relativistic effective core potentials considerably affects the band structure and magnetic structure at low tem- peratures. All calculations indicate mixed metallic-covalent chemical bonding in UN crystal with U5f states near the Fermi level. On the basis of the experience accumulated in UN bulk simulations, we compare the atomic and elec- tronic structure as well as the formation energy for UN(001) surface calculated on slabs of different thickness using both DFT approach…
Empirical molecular dynamics study of structural, elastic and thermodynamic properties of zinc-blende-like SiGe compound
2004
Abstract A three-body potential coupled with a molecular-dynamics method is used to calculate structural and thermodynamic properties of the hypothetical IV–IV compound SiGe in zinc-blende phase. A good agreement between the calculated and theoretical values of the lattice constant, the bulk modulus and its derivative, and the cohesive energy is obtained. We also compute the elastic constants, Debye temperature, lattice thermal expansion, and the specific heat. We investigate also, the structural properties of SiGe when rock-salt phase appears.
Lattice dynamics of wurtzite and rocksalt AlN under high pressure: Effect of compression on the crystal anisotropy of wurtzite-type semiconductors
2008
Raman spectra of aluminum nitride (AlN) under pressure have been measured up to $25\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$, i.e., beyond the onset of the wurtzite-to-rocksalt phase transition around $20\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The experimental pressure coefficients for all the Raman-active modes of the wurtzite phase are reported and compared to those obtained from ab initio lattice dynamical calculations, as well as to previous experimental and theoretical results. The pressure coefficients of all the Raman-active modes in wurtzite-type semiconductors (AlN, GaN, InN, ZnO, and BeO), as well as the relatively low bulk modulus and phase transition pressure in wurtzite AlN, a…
Influence of the Richardson number on EM force driven flow structures in square-shaped crucible
2014
Abstract This study is devoted to the experimental investigation of the turbulent melt motion in a square crucible where the flow is created by Lorentz forces generated by an external AC magnetic field. As a strong vertical thermal gradient is present in melt during a directional solidification process, a stratification effect takes place and motion in the vertical direction is damped by buoyancy forces. Such a situation arises if density of fluid layers decreases with height. Experimental velocity and temperature measurements are conducted. Transient effects, like collapse of stratification, are observed experimentally. The significance of stratification in the directional solidification m…
La cruzada antifrancesa
2003
A Study into the Integration of ICT into a Business Management Course: Challenges and Achievements
2012
Nowadays, the Information and Communications Technologies (ICT) play an increasingly important role in education. Indeed, ICT are considered as very useful pedagogic tools, and multimedia resources are constantly being created, updated and shared by university members worldwide. This paper deals with a case of study exploring the way in which the integration of ICT impacts learning in the context of a business management course at the Universitat de València (UV), in Spain. The results of the study point out the need for academic staff and students to acquire the appropriate knowledge and to develop the skills required for an efficient and effective use of ICT in higher education. Keywords:…
Efectos del desarrollo sostenible percibido por el consumidor. Una propuesta de modelo de hipermercados en Ecuador
2020
Resumen El objetivo de este trabajo fue analizar la incidencia del desarrollo sostenible sobre la cadena de efectos: valor percibido - capital de marca - lealtad. Para ello, se propone un modelo teórico de relaciones que se contrasta a partir de una muestra de 317 clientes de hiper mercados en Ecuador. Los resultados, aplicando una metodología exploratoria y confirmatoria, combinada con regresión por mínimos cuadrados parciales, mostraron que tanto las acciones de desarrollo sostenible como el valor percibido son pilares maestros sobre los que se puede apoyar la estrategia minorista. Ambas se muestran como variables clave por su naturaleza, en cuanto son multidimensio nales, y por su alcanc…
Supply chain management impact on competitiveness of business organizations
2014
Šī promocijas darba mērķis ir izpētīt, kā uzņēmumiem būtu jānosaka darbības joma, jāizstrādā un sekmīgi jāīsteno piegādes ķēdes vadība, lai sasniegtu augstu konkurētspēju, kā arī, kādi kritiski faktori nosaka to, lai piegādes ķēdes vadība nodrošinātu konkurētspēju. Parametri PĶV ietekmes novērtēšanai tika noteikti, balstoties literatūras un esošo pētījumu, kā arī situācijas izpētes analīzē, kuras rezultāti apkopoti visaptverošā konceptuālā modelī, kas sasaista īpašības, kas raksturīgas orientācijai uz klientu, piegādes ķēdes vadības briedumam (stratēģisks skatījums uz piegādes ķēdes vadību un operatīvs skatījums uz piegādes ķēdes vadību), līderībai un piegādes ķēdes rezultativitātei (to rak…