Search results for "LESS"
showing 10 items of 2452 documents
HybridS: A Scheme for Secure Distributed Data Storage in WSNs
2008
In unattended wireless sensor networks (WSNs), data is stored locally or at designated nodes upon sensing, and users can access it on demand. This paradigm can improve energy efficiency by making use of the upcoming cheap and large flash memory, as well as system robustness. Nevertheless, the security and dependability of distributed storage are critical for the applicability of such WSNs. In this paper, we propose a secure and dependable data storage scheme by taking advantages of secret sharing and Reed-Solomon code, which has computational security and yet maintains optimal data size. The extensive analysis verifies our scheme can provide secure and dependable data storage in WSNs in the…
A resilient distributed measurement system for smart grid application
2020
Since the production of energy from renewable energy sources is strongly increasing, the migration from the classical electric grid toward the smart grid is becoming a reality. Distribution System Operators, along with the control of the entire network and its stability, need to address the security and the reliability of the communication channels and the data itself. In this paper a solution is proposed to address these issues. It is based on a distributed measurement system that relies on a wireless network as well as a redundant Power Line communication system in order to transfer the electrical measures to a centralized SCADA server. The collected data are used to run a power flow algo…
Le parole della musica nella Divina Commedia
2018
L'Autrice analizza un ampio corpus delle parole legate alla musica nella Divina Commedia, esaminando le differenze nelle occorrenze delle tre cantiche e giustificando le differenze stesse. Dei lessemi viene presentata un'analisi condotta secondo gli approcci propri della linguistica cognitiva, nello specifico quello semasiologico e quello onomasiologico. Mentre la parola 'musica ' non è attesta, molto diffuso è il termine 'canto' nel valore proprio e in quello metaforico. La rete di relazioni semantiche mostra una notevole ambiguità, come è dimostrato per quanto riguarda il canto di Casella, il secondo del Purgatorio. Il lavoro intende entrare in qualche modo nel laboratorio di scrittura de…
La pratica riflessiva nella formazione degli insegnanti
2021
All’inizio del XX secolo, John Dewey introdusse il concetto di riflessione in campo pedagogico e, da allora, il suo lavoro ha rappresentato un punto fermo per gli studi successivi sulla professionalità docente. Nella società della conoscenza è, infatti, riconosciuta una relazione circolare nel processo d’insegnamento tra la progettazione didattica e la formazione dei docenti, sia iniziale che in servizio. La società della conoscenza richiede, pertanto, di aggiungere a un sapere prettamente teorico o tecnico, un sapere prassico, capace di analizzare e comprendere le esperienze singolari che si stanno vivendo e di decidere quali azioni mettere in atto.
Asimmetrie di genere e di razza in The Grass is Singing di Doris Lessing
2011
Published in the early 1950s, The Grass is Singing (1950), the first work by Doris Lessing (who was awarded the Nobel Prize for Literature in 2007), through the deconstruction of certain normative characters traditionally attributed to Englishness, anticipates in its narrative plot some of those founding issues that, in the decades to come, would be explored both by the theoretical-critical writings of Second Wave Feminism and within that complex study field which became known over the Seventies, such as (post-) colonial studies. In the novel, the body of the white colonial woman living in the colonies is depicted as the site of opposite tensions and the traditional homogeneity of the group…
The White Woman’s Haunted Body in Doris Lessing’s The Grass Is Singing
2012
Underpinned by an interpretative grid where the analytic categories of gender and race are interwoven, the paper contends that Doris Lessing’s first novel, The Grass Is Singing (1950), unveils and dismantles culturally-constructed inscriptions of the white female body as elaborated within the nineteenth- and early twentieth-century British colonial discourses and largely reproduced at folk level. Exploring Lessing’s robust delineation of the entanglements of gendered sexuality and race-biased social constraints as active in the colonial context, the paper also suggests that the novel problematizes and recasts traditional British identity configurations from an authorial perspective which po…
Recensione a G. Alfano, A. Cortellessa, D. Dalmas, M. Di Gesù, S. Jossa, D. Scarpa: Dove siamo? Nuove posizioni della critica :duepunti Edizioni, Pal…
2011
G. Alfano, A. Cortellessa, D. Dalmas, M. Di Gesù, S. Jossa, D. Scarpa: Dove siamo? Nuove posizioni della critica :duepunti Edizioni, Palermo 2011. Collana Posizioni (0.1); pagine 128; prezzo € 15,00
A Novel Energy Model for MANETs based on Graphs with Activation Windows
2005
Energy usage optimization is still an important issue and a critical design factor for mobile ad hoc networks (MANETs). Only recently a few proposals appeared that consider energy-aware optimizations for routing protocols. In this paper we describe an analytical model for MANETs which is based on graphs with activation windows. The activation windows allow to model the on-off status of the network devices. Moreover, we propose an algorithm with pseudo-polynomial complexity, called STP algorithm (STPA), that based on the current position and state of the nodes determines the shortest time path between the source node and the destination node.
Lifespan-Aware Routing for Wireless Sensor Networks
2010
Wireless Sensor Networks (WSNs) have the capability to become the eyes and ears for the future networked society allowing monitoring of any habitat or object's properties remotely and independently of an energy source. Services based on this technology may change the way we monitor and control remote areas and objects. In this paper we propose a different approach to routing data across Wireless Sensor Networks. We argue that a distance-vector protocol using a lifespan-aware metric is a plausible solution to the task of routing information in WSN in a manner that both saves energy of the individual node and manages summarized energy of the system equally and fairly. The concept is designed …
Stability Analysis of Routing Strategies for the Maximum Lifetime Problem in One-Dimensional Ad-Hoc Wireless Networks
2017
In the paper we discuss solutions of the maximum network lifetime problem in one-dimensional, regular ad-hoc wireless networks. For the problem, nodes of the network generate given amount of data and send it possibly via other nodes to the data collector. To extend the network lifetime the data should be transmitted in such a way, that the energy utilized by the most overloaded node is minimized. We assume, that the nodes use the point-to-point data transmission scheme and the cost of transmission of one unit of data is arbitrary superadditive function of a distance between transmitter and receiver. We show that for the one-dimensional network in which the nodes are evenly distributed on th…