Search results for "Cni"
showing 10 items of 3680 documents
A marching-on in time meshless kernel based solver for full-wave electromagnetic simulation
2012
A meshless particle method based on an unconditionally stable time domain numerical scheme, oriented to electromagnetic transient simulations, is presented. The proposed scheme improves the smoothed particle electromagnetics method, already developed by the authors. The time stepping is approached by using the alternating directions implicit finite difference scheme, in a leapfrog way. The proposed formulation is used in order to efficiently overcome the stability relation constraint of explicit schemes. In fact, due to this constraint, large time steps cannot be used with small space steps and vice-versa. The same stability relation holds when the meshless formulation is applied together w…
Prove di coltivazione di Hypericum perforatum L. in ambiente mediterraneo
2014
La richiesta di Hypericum perforatum da parte dell'industria farmaceutica e cosmetica, sia come droga grezza che come derivati di prima trasformazione, in questi ultimi anni si sta incrementando mentre la sua disponibilità commerciale appare ancora piuttosto limitata. La possibilità di introduzione negli ordinamenti colturali mediterranei delle diverse specie di Hypericum è divenuta dunque potenzialmente assai interessante, ma richiede ancora la definizione di numerosi aspetti relativi alla risposta delle specie alla coltivazione, sia in pieno campo che in vaso, soprattutto quando questa viene condotta in ambienti diversi da quelli di vegetazione naturale. L'approfondimento di tali aspetti …
Templated growth of smart nanocomposite thin films: Hybrid aerosol assisted and atmospheric pressure chemical vapour deposition of vanadyl acetylacet…
2009
Hybrid aerosol assisted and atmospheric pressure chemical vapour deposition methodology has been utilised to produce nanocomposite thin films of gold nanoparticles and vanadium dioxide from vanadyl acetylacetonate and auric acid. The addition of tetraoctyl ammonium bromide (TOAB) to the precursor Solution gave control of the size and distribution of gold nanoparticles in the vanadium oxide matrix. These reactions led to vanadium dioxide films with reduced crystallite sizes and enhanced thermochromic properties. The films were analysed by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. Their optical and thermochromic behaviour was also determined, This h…
A procedure to calculate the I–V characteristics of thin-film photovoltaic modules using an explicit rational form
2015
Abstract Accurate models of the electrical behaviour of photovoltaic modules are effective tools for system design. One or two diode equivalent circuits have been widely used even though some mathematical difficulties were found dealing with implicit equations. In this paper, a new model based on a simple rational function, which does not contain any implicit exponential form, is presented. The model was conceived in order to be used with thin-film photovoltaic modules, whose current–voltage curves are characterised by very smooth shapes. The parameters of the model are evaluated by means of the derivatives of the issued characteristics in the short circuit and open circuit points at standa…
An accurate one-diode model suited to represent the current-voltage characteristics of crystalline and thin-film photovoltaic modules
2020
Abstract In this paper a new one-diode model, conceived in order to be used to represent the current-voltage curves of both crystalline and thin-film photovoltaic modules, is presented. The model parameters are calculated from the information contained in the datasheets issued by manufactures by means of simple iterative procedures that do not require the assumption of simplifying hypotheses. Some innovative relations describing the dependence of the parameters from the solar irradiance and cell temperature are adopted in order to permit the model to reliably simulate the electrical behaviour of photovoltaic devices operating in real conditions. The ability of the model to calculate the cur…
ECO-FRIENDLY MATERIALS FOR THE ENERGY RETROFIT OF EXISTING BUILDINGS
2015
Today is widely recognized that the main cause of CO2 production and of non-renewable energy consumptions in Europe is due to the building field. For this reason, to improve the energy performance of existing houses through an energy retrofit action (adapting their performances to those required by regulations) is an important strategy to reduce energy consumptions since they are much more than new ones, also representing an economic opportunity. In particular, an important approach in the reducing energy needs consists in the thermal insulation of the envelope, through the application of innovative technologies and materials. The paper will present the result of a research about the possib…
TECNICHE OTTICHE PER IL MONITORAGGIO DEI CORSI D’ACQUA: UNA PROCEDURA AUTOMATICA PER L’INDIVIDUAZIONE DELLA MIGLORE SEQUENZA VIDEO DA PROCESSARE CON …
Misurare con accuratezza le portate di un corso d’acqua è uno dei principali obiettivi dell’idrometria tecnica (Eltner et al., 2020) e rappresenta da decenni una vera e propria sfida per la comunità scientifica. Le osservazioni di deflusso nei corsi d’acqua sono di fondamentale importanza per qualsiasi applicazione idrologica e idraulica (Pizarro et al., 2020) e consentono di comprendere al meglio le dinamiche di processi complessi, come ad esempio le piene lampo (Perks et al., 2016). La portata è una grandezza fisica la cui stima è caratterizzata da considerevole incertezza. Gli approcci tradizionali prevedono una stima indiretta della grandezza, attraverso un metodo velocità-area, che con…
Textkritisches zu Agatharchides von Knidos und zu Markian von Heraklea
2020
Some new textual arrangements are proposed ad Agatarchide di Cnido (betrayed in Photius) and a Marciano di Eraclea.
specific inflammatory response of Anemonia sulcata (cnidaria) after bacterial injection cause tissue rejection and enzymatic activity alteration
2015
The evolution of multicellular organisms was marked by adaptation to protect against pathogens. The mechanisms for discriminating the ''self'' from ''non-self” have evolved into a long history of cellular and molecular strategies from damage repair to the co-evolution of host-pathogen interaction. The phylum of Cnidaria is one of the first branches in the tree of animal life to provide crucial insights on the evolution of immunity. Sea anemones (Anthozoa, Cnidaria) are benthic sessile species able to maintain the integrity of the tissues and allorecognition in colonial forms and to differentiate between symbionts and pathogenic intruders. We investigated the inflammatory response in sea ane…
Neuromodulación eléctrica y dolor raquídeo
2015
espanolEl dolor de origen raquideo es un cuadro patologico con una importante incidencia y prevalencia y un enorme impacto socio-sanitario. La incorporacion de las diferentes tecnicas de neuromodulacion electrica en el tratamiento de estos pacientes se ha mostrado como una alternativa terapeutica novedosa, segura y eficaz. El presente trabajo de revision pretende profundizar desde el punto de vista etiologico y fisiopatologico en el dolor raquideo, y sobre todo en el sindrome de cirugia fallida espinal. Se intentara acercar la tecnica quirurgica de implantacion, comentar las indicaciones y resultados obtenidos hasta la actualidad, y realizar una aproximacion critica a los posibles mecanismo…