3,243 research outputs found
Sun Position Identification in Sky Images for Nowcasting Application
Get PDFVery-short-term photovoltaic power forecast, namely nowcasting, is gaining increasing attention to face grid stability issues and to optimize microgrid energy management systems in the presence of large penetration of renewable energy sources. In order to identify local phenomena as sharp ramps in photovoltaic production, whole sky images can be used effectively. The first step in the implementation of new and effective nowcasting algorithms is the identification of Sun positions. In this paper, three different techniques (solar angle-based, image processing-based, and neural network-based techniques) are proposed, described, and compared. These techniques are tested on real images obtained with a camera installed at SolarTechLab at Politecnico di Milano, Milan, Italy. Finally, the three techniques are compared by introducing some performance parameters aiming to evaluate of their reliability, accuracy, and computational effort. The neural network-based technique obtains the best performance: in fact, this method is able to identify accurately the Sun position and to estimate it when the Sun is covered by clouds
A imagem de Alessandro Baricco no Brasil
Get PDFDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2013.Com a intenção de delinear o modo pelo qual o escritor italiano Alessandro Baricco se inseriu no sistema literário brasileiro e os caminhos percorridos pelos seus livros traduzidos, esta dissertação dá voz às experiências tradutórias de seus tradutores. A inserção de Bariccono Brasil tem seu início em 1997, através de uma proposição da Profa. Dra. Roberta Barni à editora Iluminuras da tradução de Oceano Mare. A partir daí, outras sete obras foram publicadas no Brasil, sendo três delas traduzidas por Roberta Barni e as outras quatro por quatro tradutores diferentes. De um lado, considera-se o tradutor como figura principal namediação entre culturas, e, de outro, se analisa a realidade desta figuradentro do sistema literário, sua invisibilidade, seus limites e o exercíciode sua profissão. A pesquisa conta, ainda, com críticas e resenhas referentes ao autor italiano publicadas em jornais consagrados no Brasil, considerando estas como parte constituinte da imagem de Baricco refletida em território nacional. Abstract : Intending to delineate the way the Italian writer Alessandro Baricco has been inserted in the Brazilian literary system and the paths his translated books have followed, this thesis gives voice to the translating experiences of his translators. Baricco's insertion in Brazil began in 1997, through a personal project of Dr. Roberta Barni, with her translation of Oceano Mare. Since then, seven other of his works have been published in Brazil, three of which were translated by Roberta Barni and the other four by four different translators. On the one hand,the translator is considered as the main figure in mediation betweencultures and, on the other, this figure's reality is analyzed within theliterary system: its invisibility, its limits and its professional practice. Criticisms and reviews of this Italian author published in well established Brazilian newspapers are also considered, with the understanding that they are part of Baricco's image reflected here
Functions of the haspin genes in the control of budding yeast cell cycle
No full textFunctions of the haspin genes in the control of budding yeast cell cycle Haspin is a serine/threonine kinase, originally identified in mouse and human cells. Haspin-like proteins have been found in all eukaryotic organisms, including yeast the Saccharomyces cerevisiae. In budding yeast there are two haspin-like homologues encoded by the genes ALK1 and ALK2, these two ORFs are previously uncharacterized. We identified Alk1 as an interactor of the DNA damage checkpoint protein Ddc1 in a two hybrid screening, also Alk2 interacts with Ddc1 in the same system. The first part of my thesis work consisted in the biochemical characterization of the Alk1 and Alk2 proteins and their cell cycle regulation. To gain some insight in the in vivo function of Alk1 and Alk2, we decided to use two classic genetic experimental approach: overexpression and deletion of ALK1 and ALK2 genes. While ALK1 overexpression does not affect cell cycle progression, the overexpression of ALK2 leads to accumulation of cells with a 2C DNA content and undivided nuclei. We found that cohesin cleavage induced by the TEV protease, bypasses these phenotypes. It is possible that Alk2 plays a direct action on the cohesin complex or, on the separase. Our results suggest, a role for Alk2 in the establishment of chromosomal cohesion, in the control of cohesin stability and in the regulation of separase. The second approach was based on a classical genetic analysis of deletion mutants. Dalk1 and Dalk2 strains did not show any sensitivity of single and double mutants to genotoxic agents, or defects in DNA damage checkpoint activation. Later, by analysing the phenotype of ALK2 overexpression, a mitotic role for Alk2 was emerged, and we thus decided to focus our attention on the role of Alk1 and Alk2 in mitosis. On plates Dalk1Dalk2 cells show sensitivity to benomyl treatment, this result orients our study on the role of haspins toward the spindle dynamics field. We first test the role of Alk1 and Alk2 in the regulation of the spindle checkpoint but our results seem to exclude a role for Alk1 and Alk2. We tested whether Dalk1Dalk2 cells are capable to re-assemble and re-orient the mitotic spindle correctly after microtubule depolymerization, in Dalk1Dalk2 cells this process seems to takes place with normal timing
La maturità di Alessandro Fei del Barbiere, in bilico tra Maniera e Riforma
No full textThis article studies the mature career of the Florentine painter Alessandro Fei del Barbiere (1537-1592), beginning with the rediscovery of the 'Ascension' altarpiece formerly in the Albizi Chapel in the destroyed church of San Pier Maggiore, Florence. Studying this painting and others recorded in 1584 by the biographer Raffaello Borghini, such as the two altarpieces for Santa Maria delle Grazie and the Madonna dell'Umiltà in Pistoia, the author reconstructs a body of works showing how in the 1580s Fei gradually went beyond the archaic style of his apprenticeship - he had been trained by Ridolfo del Ghirlandaio and Pierfrancesco Foschi, but was also marked by the Maniera of Vasari - evolving towards naturalism in both mimesis and pictorial handling. In Florence, his development partly parallels that of Santi di Tito and his circle, but Fei was also influenced by a probable sojourn during the early part of that decade in Rome, where he could have been inspired by Girolamo Muziano and the painters working for Pope Gregory XIII. Among other proposals, the author suggests that the artist was responsible for decorating the chancel of Fiesole Cathedral (c. 1584-1589), which consisted of an altarpiece, only rarely discussed by scholars, and a cycle of frescoes hitherto attributed to Nicodemo Ferrucci
Tra socialdemocrazie e Perestrojka. Le relazioni internazionali del Pci attraverso le carte di Alessandro Natta
No full textThis essay reconstructs the foreign policy of the Italian Communist Party during the four
years of Alessandro Natta’s secretariat (1984-1988) through largely original archival documentation,
from the Alessandro Natta Fonds of the Historical Archive of the Chamber of
Deputies. Natta’s papers are also cross-referenced with those kept in the PCI Archive at the
Gramsci Foundation. The author analyses the relationship that the PCI establishes with
Gorbachev’s Perestroika, Deng’s China, and European social democracies during the last
years of the Cold War
Deficit idiopatico di ormone somatotropo: valutazione auxoendocrinologica e composizione corporea al termine della terapia sostitutiva.
No full textA 16-years longitudinal study on childhood obesity progression in adulthood: role of dietary macronutrients
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