Decentralized state estimation for the control of network systems     

Francesca Boem  Lorenzo Sabattini  Cristian Secchi 《Journal of The Franklin Institute》2019,356(2):860-882

The paper proposes a decentralized state estimation method for the control of network systems, where a cooperative objective has to be achieved. The nodes of the network are partitioned into independent nodes, providing the control inputs, and dependent nodes, controlled by local interaction laws. The proposed state estimation algorithm allows the independent nodes to estimate the state of the dependent nodes in a completely decentralized way. To do that, it is necessary for each independent node of the network to estimate the control input components computed by the other independent nodes, without requiring communication among the independent nodes. The decentralized state estimator, including an input estimator, is developed and the convergence properties are studied. Simulation results show the effectiveness of the proposed approach.  相似文献   

In the making: constructing in-school pregnancy in Mozambique     

Francesca Salvi 《Gender and education》2018,30(4):494-512

This article examines current in-school pregnancy policy in Mozambique, Decree 39/GM/2003, discussing how it discursively constructs in-school pregnancy as a problem, thereby raising the need to regulate its occurrence. Decree 39/GM/2003 indicates that pregnant schoolgirls should be transferred to night courses in order to complete their education. Although progressive in some respects, as it allows pregnant girls to remain in education, the Decree reflects a global tendency to see education and pregnancy as oppositional. As a consequence, the practical implications of transferring pregnant girls to night courses have the perverse effect of encouraging dropout. Stimulated by this contradiction, I reflect on how the policy text produces a deficit view of the pregnant schoolgirl. This Foucauldian process of subjectification results in a strengthening of the opposition between pregnancy and education. As a result, pregnant schoolgirls are ‘thrown out’ of their education, defeating the inclusive aims of the national policy.  相似文献   

Origins of individual differences in imitation: links with language, pretend play, and socially insightful behavior in two-year-old twins     

McEwen F  Happé F  Bolton P  Rijsdijk F  Ronald A  Dworzynski K  Plomin R 《Child development》2007,78(2):474-492

Imitation, vocabulary, pretend play, and socially insightful behavior were investigated in 5,206 same- and opposite-sex 2-year-old twin pairs in the United Kingdom. Individual differences in imitative ability were due to modest heritability (30%), while environmental factors shared between twins (42%) and unique to each twin (28%) also made significant contributions to the variance. Imitation correlated significantly, although modestly, with vocabulary, pretend play, and socially insightful behavior, and the strongest relationship was with vocabulary. A model that represented the covariance between the variables as being due to correlated latent genetic and environmental factors fitted the data well, with shared environmental factors influencing most of the covariance. Parents who encourage imitation may also tend to foster the development of language, pretence, and socially insightful behavior.  相似文献   

Bibliography,National Bibliography,and National Union Catalog in Italy*     

Francesca Nepori 《Cataloging & classification quarterly》2019,57(1):73-87

Abstract

This article analyzes the role of national bibliographies—with particular reference to the Italian National Bibliography—as relevant tools for national bibliographic control. In the first part of the article, the historical and scientific context of international standards is summarized. The second part describes the role played by the Central National Library of Florence (BNCF) in the realization of the bibliographic control of Italian publications. The limits and the potential of the Italian National Bibliography produced by BNCF are highlighted and compared with the Italian National Library Service (SBN), which is the most important national collective catalog among Italian libraries.  相似文献   

The white colour in Etruscan polychromes on terracotta: Spectroscopic identification of kaolin     

Francesca Bordignon  Paolo Postorino  Alessandro Nucara  Paolo Dore  Giorgio Trojsi  Vincenzo Bellelli 《Journal of Cultural Heritage》2008,9(1):23

The present work reports on a spectroscopic study of white colour samples collected from Etruscan polychromes on terracotta from the Cerveteri area. In particular, both white-on-red potsherds of the Orientalising period and high-value polychromes of the Archaic period were considered. The white pigment, a fundamental element in this class of artworks, was not clearly identified in previous archaeological and analytical studies, although the use of kaolin was tentatively proposed. Therefore, samples from the Monte Sughereto kaolin quarry in the Cerveteri area were also studied. The results of detailed analyses carried out using micro-Raman spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy first show that the quarry material is a high-purity kaolin containing quartz. Raman results strongly suggest that the same kind of kaolin was employed in the polychromes of the Archaic period. As to white-on red potsherds, infrared results have a key role in showing that the white pigment is a kaolin closely corresponding to the quarry material since a particular kaolin polytype (dickite) is dominant in both cases. The present work thus provides the first definitive identification of the white pigment used in Etruscan polychromes on terracotta from the Cerveteri area, and suggests that the source of kaolin might be the Monte Sughereto quarry.  相似文献   

A new collection of studies on Spinoza     

di Poppa  Francesca 《Metascience》2019,28(2):321-324

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Holistic face processing in newborns, 3-month-old infants, and adults: evidence from the composite face effect     

Turati C  Di Giorgio E  Bardi L  Simion F 《Child development》2010,81(6):1894-1905

Holistic face processing was investigated in newborns, 3-month-old infants, and adults through a modified version of the composite face paradigm and the recording of eye movements. After familiarization to the top portion of a face, participants (N = 70) were shown 2 aligned or misaligned faces, 1 of which comprised the familiar top part. In the aligned condition, no visual preference was found at any group age. In the misaligned condition, 3-month-olds preferred the face stimulus with the familiar top part, adults preferred the face stimulus with the novel one, and newborns did not manifest any visual preference. Results revealed that both infants' and adults' eye movements may be affected by holistic face information and demonstrated holistic face processing in 3-month-olds.  相似文献   

The Multi-faceted Idea of Chance in Darwin’s Writings     

Francesca Merlin 《Science & Education》2016,25(9-10):1159-1164

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Item Response Theory analysis and Differential Item Functioning across age,gender and country of a short form of the Advanced Progressive Matrices     

Francesca Chiesi  Matteo Ciancaleoni  Silvia Galli  Kinga Morsanyi  Caterina Primi 《Learning and individual differences》2012,22(3):390-396

Item Response Theory (IRT) models were applied to investigate the psychometric properties of the Arthur and Day's Advanced Progressive Matrices-Short Form (APM-SF; 1994) [Arthur and Day (1994). Development of a short form for the Raven Advanced Progressive Matrices test. Educational and Psychological Measurement, 54, 395–403] in order to test if the scale is a reliable and valid tool to assess general fluid ability in a short time frame. The APM-SF was administered to 2264 high-school and university students. Once attested the one-factor structure of the scale, unidimensional IRT analyses for dichotomous data were applied to investigate the increases in item difficulty levels, Test Information Function, and Differential Item Functioning across age, gender, and country (comparing Italian and British respondents). Additionally, validity measures were reported. Findings attest that the Arthur and Day's APM-SF is a sound instrument for assessing fluid ability within a short time frame.  相似文献   

Conservation Science 2007     

Francesca Cappitelli  Lucia Toniolo  Joyce Townsend 《Journal of Cultural Heritage》2007,8(4):445

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