Search results for "Teoria"
showing 10 items of 2647 documents
Response calculations based on an independent particle system with the exact one-particle density matrix: Excitation energies
2012
Adiabatic response time-dependent density functional theory (TDDFT) suffers from the restriction to basically an occupied → virtual single excitation formulation. Adiabatic time-dependent density matrix functional theory allows to break away from this restriction. Problematic excitations for TDDFT, viz. bonding-antibonding, double, charge transfer, and higher excitations, are calculated along the bond-dissociation coordinate of the prototype molecules H2 and HeH+ using the recently developed adiabatic linear response phase-including (PI) natural orbital theory (PINO). The possibility to systematically increase the scope of the calculation from excitations out of (strongly) occupied into wea…
Oscillator Strengths of Electronic Excitations with Response Theory using Phase Including Natural Orbital Functionals
2013
The key characteristics of electronic excitations of many-electron systems, the excitation energies ωα and the oscillator strengths fα, can be obtained from linear response theory. In one-electron models and within the adiabatic approximation, the zeros of the inverse response matrix, which occur at the excitation energies, can be obtained from a simple diagonalization. Particular cases are the eigenvalue equations of time-dependent density functional theory (TDDFT), time-dependent density matrix functional theory, and the recently developed phase-including natural orbital (PINO) functional theory. In this paper, an expression for the oscillator strengths fα of the electronic excitations is…
Exergy analysis of electrodialysis for water desalination: Influence of irreversibility sources
2022
The increasing freshwater demand is pushing the development and adoption of desalination technologies. In this framework, electrodialysis has a consolidated role in brackish water desalination, but to make it competitive with other technologies for the desalination of more concentrated solutions (e.g., seawater), the specific energy consumption should be reduced. Exergy analysis provides a useful tool for determining the contribution of each thermodynamic inefficiencies on the process efficiency and the specific energy consumption. In this regard, this paper presents an exergy analysis of the electrodialysis process. A 1-D model is used for evaluating the performance of industrial-scale sys…
Exergy analysis and thermoeconomic cost accounting of a CHP steam cycle integrated with MED-TVC desalination
2016
In this paper exergy analysis and thermoeconomic cost accounting of a CHP steam cycle integrated with MED-TVC plant is performed; the purpose is to show how this methodology provides a rational criterion to allocate production costs on electricity and freshwater. After a brief overview on methodology and a description of reference plant, exergy analysis is carried out in order to calculate exergy flows and plant exergetic performance. A detailed description of the adopted thermoeconomic model is given. Cost accounting is performed considering two scenarios: in the first, the concentrated brine is disposed back to sea, thus being its exergy content definitively wasted; in the second, convers…
Seawater desalination : state of the art on conventional technologies
2009
Introduction
2019
The introduction gives a brief overview of some important developments in recent scholarship on René Descartes and Baruch Spinoza. It is argued that there has been a shift of focus, away from Descartes-the-dualist towards an interest in Descartes’ ethics and his conception of the human being as a union of mind and body. This turn has also given rise to new perspectives on the relations between Descartes and Spinoza. After having presented the area of research covered by the volume, the introduction offers short presentations of the individual chapters. These are divided into three parts: the first part focusing on different features of Cartesian persons; the second discussing different aspe…
Itinerari del senso
2022
Analysing the phenomena of desemantization/resemantization may reveal itself as a fertile crossroads around which issues relating to objects, media products (from cinema to TV series, from memes to parodies), spaces (urban arteries, buildings, museums, commercial places), artworks etc. intersect. From a linguistic point of view, desemantization and resemantization involve the loss and rediscovery of senses and meanings of words. Applied to other forms of language, similar phenomena can be found in the elimination/attribution of old and new uses to buildings, functionalities to objects, readings to texts. In other words, they imply the notion of value and investment or recognition of that va…
Quando è design
2020
Quando è design è il titolo di un convegno che, per iniziativa di Paolo Fabbri, si è svolto nel Centro Internazionale di Semiotica dell’Università di Urbino nel settembre del 2018, e che abbiamo organizzato insieme a Dario Mangano con la collaborazione di Projekt (EA 7447), Laboratorio di ricerca in innovazione sociale attraverso il design dell’Università di Nîmes (Francia). Gli articoli presenti in questo numero di Ocula sono il risultato dell’evoluzione delle riflessioni della maggioranza dei relatori presenti al convegno anche in seguito agli scambi iniziati proprio in quell’occasione When is Design, we find those characteristics and values of “design culture” that regard design processe…
La teoria dell’associazione-rinforzo differenziale di Robert L. Burgess e Ronald L. Akers
2017
Il saggio analizza gli sviluppi compiuti da Robert L. Burgess e Ronald L. Akers dell’associazione differenziale a partire dagli approcci psicologici dell’apprendimento maturati in ambito comportamentista.
Salvatore Di Piazza. 2011. Congetture e approssimazioni. Forme del sapere in Aristotele (Milano-Udine : Mimesis)
2013
Quel est le statut épistémologique d’une discipline qui, quelquefois, n’atteint pas à ses objectifs ? C’est la question que Di Piazza pose dans Congetture e approssimazioni. Elle concerne la rhétorique et, avec elle, toutes les disciplines qui ont un statut épistémologique comparable, à commencer par la médecine. Trois éléments - disons trois piliers - délimitent le chantier de Di Piazza : la rhétorique, la médecine et la philosophie d’Aristote.Le point de départ est la décision de ne pas se ...