Search results for "Fig"
showing 10 items of 1359 documents
Dalla figura all'interpretazione: scoli a Optaziano Porfirio.
2012
Planar metamaterial analogue of electromagnetically induced transparency for plasmonic sensing.
2009
We experimentally demonstrate a planar metamaterial analogue of electromagnetically induced transparency at optical frequencies. The structure consists of an optically bright dipole antenna and an optically dark quadrupole antenna, which are cut-out structures in a thin gold film. A pronounced coupling-induced reflectance peak is observed within a broad resonance spectrum. A metamaterial sensor based on these coupling effects is experimentally demonstrated and yields a sensitivity of 588 nm/RIU and a figure of merit of 3.8.
Increasing efficiency of photovoltaic systems under non-homogeneous solar irradiation using improved Dynamic Programming methods
2017
Abstract The paper presents a complete technique, based on the combination of algorithms, devoted to minimize losses and increase efficiency of Total Cross Tied (TCT) connected photovoltaic (PV) systems under non-homogeneous solar irradiation, based on irradiance equalization criterion. Irradiance equalization is achieved by changing the connections of the solar panels adaptively by a dynamic switching matrix so that total solar radiation on parallel circuits is the most equalized. In this paper, the authors introduce two algorithms. The first one is SmartChoice (SC) algorithm, which is combined with Dynamic Programming (DP) in order to create a hybrid method and obtain better results as co…
AN OBJECT ORIENTED MODEL FOR SCHEDULING IN AGILE MANUFACTURING
2002
Agility represents a key factor in industry to handle the continuous market changes. Companies must re-organize their activities to be agile and competitive in such a dynamic environment. In particular, production planning and control tools are very important to optimize the manufacturing process responsiveness to sudden changes in customer demand. In this paper, an attempt has been made to develop an object-oriented software architecture that allows the optimal line organization to be determined once a set of parts to be produced has been ordered. An optimization module represented by a simulated annealing algorithm has been interfaced with an object oriented architecture to build up a fr…
A hierarchical architecture for increasing efficiency of large photovoltaic plants under non-homogeneous solar irradiation
2019
Abstract Under non-homogeneous solar irradiation, photovoltaic (PV) panels receive different solar irradiance, resulting in a decrease in efficiency of the PV generation system. There are a few technical options to fix this issue that goes under the name of mismatch. One of these is the reconfiguration of the PV generation system, namely changing the connections of the PV panels from the initial configuration to the optimal one. Such technique has been widely considered for small systems, due to the excessive number of required switches. In this paper, the authors propose a new method for increasing the efficiency of large PV systems under non-homogeneous solar irradiation using Series-Para…
Authentic leadership and team climate: testing cross-lagged relationships
2016
Purpose – The purpose of this paper is to examine the relationships between authentic leadership and team climate across 22 months. More specifically, three alternative causation models (normal, reversed, reciprocal) were tested. Design/methodology/approach – The longitudinal study was conducted among 265 Finnish municipal employees (87.5 per cent women, mean age 48.4 years). The participants completed a questionnaire three times: at baseline (T1), about 14 months after baseline (T2) and about eight months after the second questionnaire (T3). Findings – The cross-lagged analyses based on structural equation modelling lent support to the reversed causation model more than the normal causati…
Lower Rydberg series of methane: a combined coupled cluster linear response and molecular quantum defect orbital calculation.
2006
Vertical excitation energies as well as related absolute photoabsorption oscillator strength data are very scarce in the literature for methane. In this study, we have characterized the three existing series of low-lying Rydberg states of CH4 by computing coupled cluster linear response (CCLR) vertical excitation energies together with oscillator strengths in the molecular-adapted quantum defect orbital formalism from a distorted Cs geometry selected on the basis of outer valence green function calculations. The present work provides a wide range of data of excitation energies and absolute oscillator strengths which correspond to the Rydberg series converging to the three lower ionization p…
Sputtered cuprous oxide thin films and nitrogen doping by ion implantation
2016
Abstract The structural, optical and electrical properties of sputtered cuprous oxide thin films have been optimized through post-deposition thermal treatments. Moreover we have studied the effects of nitrogen doping introduced by ion implantation followed by the optimized oxidant thermal annealing. Three concentrations have been used, 0.6 N%, 1.2 N%, and 2.5 N%. Along with the preservation of the Cu 2 O phase, a slight optical band gap narrowing and a significant conductivity enhancement has been observed with respect to the undoped samples. These results can be justified by the absence of further oxygen vacancies promoted by dopant introduction and by the substitution of O atoms by N ones…
Pittura del XIX e del XX secolo nel segno del collezionismo siciliano
2020
Il volume offre una ricognizione sul collezionismo in Sicilia e prende in esame, per la prima volta nella sua interezza, una collezione privata proponendo la riscoperta di opere di autori rappresentativi della cultura figurativa italiana del XIX e del XX secolo, tra cui Michele Catti, Ettore De Maria Bergler, Onofrio Tomaselli, Pippo Rizzo, Alfonso Amorelli e Pina Calì. La collezione privilegia la pittura dell’isola ma include anche il pittore non siciliano Giuseppe Amisani e la coppia di bronzi di Antonio Ugo e trova nelle opere "Costumi" di Salvatore Lo Forte del 1839 e "Sogno del carabiniere" di Pippo Rizzo degli anni ’50 i propri limiti cronologici. Questa raccolta privata, per lo più i…
Actuality of Art Education at the Beginning of XX Century in East Europe. Graphic Constructions Through Gestaltung and Formenlehre in Figurative Crea…
2018
The great innovations in the field of the elaboration of forms and figures in the last century have often sometimes accompanied the amazement and optimism of the discovery, a methodological uncertainty shared with other fields of Knowledge. It is undeniable that the advent of information technology and representation—together with the socio-economic changes that have taken place—has laid the foundations for an irreversible ontological leap in the process of form processing, and yet very often there are references historians that can somehow inspire current theories and practices. In this sense, some interpretations considered to be classical, from Valery to Benjamin, from Arnheim to Waburg,…