Search results for "ESA"
showing 10 items of 11914 documents
Topological polarization, dual invariants, and surface flat band in crystalline insulators
2020
We describe a three-dimensional crystalline topological insulator (TI) phase of matter that exhibits spontaneous polarization. This polarization results from the presence of (approximately) flat bands on the surface of such TIs. These flat bands are a consequence of the bulk-boundary correspondence of polarized topological media, and contrary to related nodal line semimetal phases also containing surface flat bands, they span the entire surface Brillouin zone. We also present an example Hamiltonian exhibiting a Lifshitz transition from the nodal line phase to the TI phase with polarization. Utilizing elasticity tetrads, we show a complete classification of 3D crystalline TI phases and invar…
Comany establishment and Entrepreneurship Presentations Teoria
2020
Presentacions de l'assignatura Emprenedoria i Creació d'empreses, codi 35822, del Grau en ADE i Doble Grau en Turisme-ADE. Presentations to be employed in the lectures of the subject company establishment and entrepreneurship, code 35822. Degree in business administration and, double Degree in tourism and business administration.
Institutional arrangements for sustainable development: Cases from the Navarra Province (Spain).
2015
After more than 20 years of the Earth Summit, Sustainable development is still recognized as one of the main challenges of the XXIst century. World leaders are putting new emphasis on the need to resolve urgent environmental challenges underlining their link with the wellbeing of humankind and the very conditions that made life possible on the planet. We are immersed in complex socio-ecological systems where sectoral or simplified responses are not adequate. A more systemic vision is imperative to effectively address the challenges faced. New approaches are being developed to integrate social, environmental and economic concerns in all human activities. Particular attention is given to deco…
Planeamiento territorial sostenible: un reto para el futuro de nuestras sociedades; criterios aplicados
2016
Resumen En buena parte de los 17 objetivos de desarrollo sostenible marcados como metas de la humanidad por la ONU se deja entrever la sostenibilidad. Debido al modelo socioproductivo dominante, el único modo de avanzar hacia territorios más sostenibles que permitan alcanzar y mantener el bienestar de la población mundial, es tener presente la necesidad de planificar adecuadamente el desarrollo territorial. Este trabajo reflexiona sobre esta necesidad y avanza en la definición de los principales criterios para alcanzar la sostenibilidad territorial en las escalas regionales y locales.
Studio di fattibilità per la definizione di azioni ed interventi per il sistema turistico e per lo sviluppo delle filiere produttive dell'ambito terr…
2007
Lo studio individua le attività manifatturiere e del commercio distinte in principali e secondarie. Si passa poi all’individuazione e localizzazione dei prodotti tipici e locali collegabili al sistema ospitale. Nella parte II viene effettuata un’analisi della domanda turistica. Nella parte III, infine, si passa all’analisi strategica del territorio sviluppando una Swot Analysis strettamente centrata su un turismo escursionistico con prevalente connotazione eno-gastronomica. Da tutto ciò, scaturiscono le possibili azioni strategiche per lo sviluppo del sistema turistico e delle filiere produttive collegabili alla domanda turistica. L’analisi volta ad accertare le principali caratteristiche r…
"Il Parco della Valle dei Templi di Agrigento"
2009
La Valle dei Templi di Agrigento, sito UNESCO e Patrimonio dell’Umanità, non è riuscita finora a spingere in maniera significativa lo sviluppo locale. Questo obiettivo potrebbe essere raggiunto attraverso l’attuazione del Piano del Parco, che propone un processo capillare di valorizzazione multifunzionale del territorio attraverso la partecipazione e la crescita culturale della comunità.
Towards Robust Adaptive Least-Squares Parameter Estimation with Internal Feedback
1998
Abstract The new concepts of the ‘covariance matrix normalization’ and the ‘cascade’ structure of the adaptive least-squares estimator are shown to generalize and extend the use of internal information feedback in various robustness/alertness-oriented modifications to the standard ALS estimation algorithm. In the cascade estimation structure it is possible to ‘naturally’ stabilize, rather than maximize, the information matrix so that the covariance windup and blowup are effectively eliminated and the celebrated square root update of the covariance matrix is no longer needed Consequently, a new, ‘single-loop/cascade’ ALS MIMO estimation algorithm, enabling to effectively track both slow and …
The Jäntti approach to adsorption with increasing gas pressure
2002
Jäntti introduced a method of calculating equilibrium adsorption from measurements where the pressure of the gas was varied in a stepwise manner. His aim was to shorten the time necessary for a given measurement. The method was applied to gas/solid systems in which simple adsorption processes occurred and where the number of adsorption sites was infinite. The present paper discusses the case where no adsorption is possible on an already occupied site (Langmuir isotherm) while the number of positions available for adsorption is considered limited. The advantages of using a gas pressure that increases linearly with time are evident for studies with this limitation. It is shown that such meas…
Hysteretic Systems Subjected to Delta Correlated Input
1994
The paper deals with the evaluation of the probabilistic response of a single degree of freedom elastic-perfectly plastic system subjected to a delta correlated input process. The probabilistic characterisation of the response is here obtained by considering the accumulated plastic deformations as a compound homogeneous Poisson process independent of the external input. In this case the former can be considered as an external noise acting on the linear system. A closed form solution is also obtained and the analytic expression is compared with the customary Monte-Carlo method.
Emmy Noether in Bryn Mawr
2020
In the annals of higher education for women, two elite colleges were particularly important for mathematics: Girton College, in Cambridge, England and Bryn Mawr College, near Philadelphia, Pennsylvania.