Search results for "wt"
showing 10 items of 5424 documents
Channel estimation and transmit power control in wireless body area networks
2015
Wireless body area networks have recently received much attention because of their application to assisted living and remote patient monitoring. For these applications, energy minimisation is a critical issue since, in many cases, batteries cannot be easily replaced or recharged. Reducing energy expenditure by avoiding unnecessary high transmission power and minimising frame retransmissions is therefore crucial. In this study, a transmit power control scheme suitable for IEEE 802.15.6 networks operating in beacon mode with superframe boundaries is proposed. The transmission power is modulated, frame-by-frame, according to a run-time estimation of the channel conditions. Power measurements u…
I diritti dei lavoratori nella globalizzazione. Che prezzo (se lo conosciamo) siamo disposti a pagare?
2015
L’articolo ha come obiettivo dimostrare l’inefficacia del diritto del lavoro in tempi di globalizzazione nel tutelare il lavoratore, quale contraente debole del rapporto di lavoro. Dopo una breve disamina del contesto storico-politico della globalizzazione, che ha portato ad un diritto del lavoro sempre più privatizzato, si insiste nell’assenza di una forma di protezione universale per i lavoratori dal punto di vista del diritto internazionale pubblico nei sistemi OIL-WTO-carte Onu; si individua infine come unica tutela transnazionale, e comunque orientata in senso favorevole al mercato, la giurisprudenza della Corte di Giustizia alla luce delle disposizioni della Carta europea dei diritti …
Vulnerability to Forced Labour and Trafficking: The case of Romanian women in the agricultural sector in Sicily
2015
This paper focuses on labour and sexual exploitation faced by Romanian female workers employed in the agricultural sector in Ragusa, Sicily, Italy. Drawing on fieldwork conducted in 2013 and 2014 with Romanian female farm workers in Ragusa, the paper identifies factors that contribute towards their vulnerability to exploitation. By paying specific attention to the experiences of women who are mothers with dependent children, we look at structural factors that increase their vulnerability and consider how this vulnerability ‘forces’ women into situations whereby they effectively accept and/or submit to abuse. We also highlight how European Union (EU) citizenship does not automatically protec…
Intersezioni. Percorsi attraverso i saperi. Scienza ed etica
2012
"Intersezioni. Percorsi attraverso i saperi" sono dei percorsi interdisciplinari inseriti nel "Nuovo manuale di letteratura" di Luperini, Cataldi, Marchiani, Marchese, che vengono introdotti per potenziare il lavoro di preparazione in vista dell'esame di Stato della Scuola Secondaria di 2° grado. Tali percorsi intrecciano testi letterari e non letterari (compresi documenti iconografici e fotografici) e forniscono dei laboratori di scrittura per la produzione del saggio breve, del tema storico o di ordine generale. In particolare, questo percorso è dedicato al rapporto fra scienza, filosofia e morale nel periodo compreso fra la Rivoluzione copernicana (e la nascita della scienza moderna nel …
Predictors and outcomes associated with the growth curves of self-efficacy beliefs in regard to anger and sadness regulation during adolescence: a lo…
2023
IntroductionThis longitudinal study examined unique and joint effects of parenting and negative emotionality in predicting the growth curves of adolescents’ self-efficacy beliefs about regulating two discrete negative emotions (anger and sadness) and the association of these growth curves with later maladjustment (i.e., internalizing and externalizing problems).MethodsParticipants were 285 children (T1: Mage = 10.57, SD = 0.68; 53.3% girls) and their parents (mothers N = 286; fathers N = 276) from Colombia and Italy. Parental warmth, harsh parenting, and internalizing and externalizing problems were measured in late childhood at T1, whereas early adolescents’ anger and sadness were measured…
Roma Youth
2021
This chapter highlights the importance of integrating research on positive youth development processes in the most disadvantaged youth groups. The authors focused on Roma youth, representing a prototypical low-status minority group. The first part of the chapter examines the demographics and the socially, politically, and ideologically challenging contexts in which Roma young people are embedded, taking into account the case of Italy, one European country with high anti-Roma sentiments. The second part summarizes the literature that deals with social-psychological factors underlying the developmental functioning and optimal well-being of Roma youth in spite of adversity. The third part focu…
Central polynomials of graded algebras: Capturing their exponential growth
2022
Let G be a finite abelian group and let A be an associative G-graded algebra over a field of characteristic zero. A central G-polynomial is a polynomial of the free associative G-graded algebra that takes central values for all graded substitutions of homogeneous elements of A. We prove the existence and the integrability of two limits called the central G-exponent and the proper central G-exponent that give a quantitative measure of the growth of the central G-polynomials and the proper central G-polynomials, respectively. Moreover, we compare them with the G-exponent of the algebra.
Superalgebras: Polynomial identities and asymptotics
2022
To any superalgebra A is attached a numerical sequence cnsup(A), n≥1, called the sequence of supercodimensions of A. In characteristic zero its asymptotics are an invariant of the superidentities satisfied by A. It is well-known that for a PI-superalgebra such sequence is exponentially bounded and expsup(A)=limn→∞cnsup(A)n is an integer that can be explicitly computed. Here we introduce a notion of fundamental superalgebra over a field of characteristic zero. We prove that if A is such an algebra, then C1ntexpsup(A)n≤cnsup(A)≤C2ntexpsup(A)n, where C1>0,C2,t are constants and t is a half integer that can be explicitly written as a linear function of the dimension of the even part of A an…
ON THE ASYMPTOTICS OF CAPELLI POLYNOMIALS
2021
Abstract. We present old and new results about Capelli polynomials, Z2-graded Capelli polynomials and Capelli polynomials with involution and their asymptotics. Let Capm = Pσ2Sm (sgnσ)tσ(1)x1tσ(2) · · · tσ(m−1)xm−1tσ(m) be the m-th Capelli polynomial of rank m. In the ordinary case (see [33]) it was proved the asymptotic equality between the codimensions of the T -ideal generated by the Capelli polynomial Capk2+1 and the codimensions of the matrix algebra Mk(F ). In [9] this result was extended to superalgebras proving that the Z2-graded codimensions of the T2-ideal generated by the Z2-graded Capelli polynomials Cap0 M+1 and Cap1 L+1 for some fixed M, L, are asymptotically equal to the Z2-g…
Trace Codimensions of Algebras and Their Exponential Growth
2022
The trace codimensions give a quantitative description of the identities satisfied by an algebra with trace. Here we study the asymptotic behaviour of the sequence of trace codimensions c tr n(A) and of pure trace codimensions c ptr n (A) of a finite-dimensional algebra A over a field of characteristic zero. We find an upper and lower bound of both codimensions and as a consequence we get that the limits limn→∞ctrn(A)√n and limn→∞cptrn(A) √n always exist and are integers. This result gives a positive answer to a conjecture of Amitsur in this setting. Finally we characterize the varieties of algebras whose exponential growth is bounded by 2