Search results for "LESS"
showing 10 items of 2452 documents
Efficient Steering Mechanism for Mobile Network-Enabled UAVs
2022
HTTP Adaptive Streaming (HAS) is becoming the de-facto video delivery technology over best-effort networks nowadays, thanks to the myriad advantages it brings. However, many studies have shown that HAS suffers from many Quality of Experience (QoE)-related issues in the presence of competing players. This is mainly caused by the selfishness of the players resulting from the decentralized intelligence given to the player. Another limitation is the bottleneck link that could happen at any time during the streaming session and anywhere in the network. These issues may result in wobbling bandwidth perception by the players and could lead to missing the deadline for chunk downloads, which result …
Priority Levels Based Multi-hop Broadcasting Method for Vehicular Ad hoc Networks
2015
International audience; This paper deals with broadcasting problem in vehicular ad hoc networks (VANETs). This communication mode is commonly used for sending safety messages and traffic information. However, designing an efficient broadcasting protocol is hard to achieve since it has to take into account some parameters related to the network environment, for example, the network density, in order to avoid causing radio interferences. In this paper, we propose a novel Autonomic Dissemination Method (ADM) which delivers messages in accordance with given priority and density levels. The proposed approach is based on two steps: an offline optimization process and an adaptation to the network …
Energy Efficiency Evaluation of Cellular Networks Based on Spatial Distributions of Traffic Load and Power Consumption
2013
Energy efficiency has gained its significance when service providers' operational costs burden with the rapidly growing data traffic demand in cellular networks. In this paper, we propose an energy efficiency model for Poisson-Voronoi tessellation (PVT) cellular networks considering spatial distributions of traffic load and power consumption. The spatial distributions of traffic load and power consumption are derived for a typical PVT cell, and can be directly extended to the whole PVT cellular network based on the Palm theory. Furthermore, the energy efficiency of PVT cellular networks is evaluated by taking into account traffic load characteristics, wireless channel effects and interferen…
Don’t Stress, It’s Under Control: Neural Correlates of Stressor Controllability in Humans
2021
AbstractAnimal research has repeatedly shown that experience of control over an aversive event can protect against the negative consequences of later uncontrollable stress. Neurobiologically, this effect is assumed to correspond to persistent changes in the pathway linking the ventromedial prefrontal cortex (vmPFC) and the dorsal raphe nucleus. However, it remains unclear to what extent these findings translate to humans. During functional magnetic resonance imaging, we subjected participants to controllable and uncontrollable aversive but non-painful electric stimuli, as well as to a control condition without aversive stimulation. In each trial, a symbol signalled whether participants coul…
Fjalor shpjegues i fjalëve të rralla të Ketës
2019
Nga pikëpamja gjuhësore dhe veçanërisht leksikore Keta është pa dyshim një autor i vështirë për t’u kuptuar nga lexuesi i sotëm. Vështirësia nuk rrjedh vetëm nga karakteri arkaik dhe tejet konservativ i arbërishtes së Sicilisë, që përbën gjithsesi bazën e gjuhës së këtij autori, por mbi të gjitha nga fakti se, sikurse e ka vënë re Matteo Mandalà në kreun VI të këtij vëllimi, Keta është autori i parë në historinë e shqipes së shkruar që u përpoq të kapërcejë kufijtë dialektorë me synimin për të krijuar një gjuhë letrare ndërdialektore që të përfshinte jo vetëm prurje nga të gjitha variantet lokale të shqipes së asokohshme, por njëherazi të ishte në gjendje të përmbushte nevojat shprehëse të …
Guest Editorial Introduction to the Special Issue on Dependable Wireless Vehicular Communications for Intelligent Transportation Systems (ITS)
2018
Over the past couple of decades, transportation systems have begun to receive widespread attention from the scientific community and emerged toward Intelligent Transportation Systems (ITS). Effective vehicular connectivity techniques can significantly enhance efficiency of travel, reduce traffic incidents and improve safety, and alleviate the impact of congestion; devising the ITS experience. Furthermore, during the past decades, the volume and density of vehicles increased significantly, especially the road traffic; this lead to a dramatic increase in the number of accidents and congestion, with negative impacts on the economy, environment, and quality of people’s lives. In particular, acc…
Doris Lessing’s Fiction: Literature as Commitment
2014
-Abstract in lingua inglese: The publication of The Grass Is Singing in 1950 inaugurated the beginning of the long and distinguished literary career of Doris Lessing (1919-2013), the 2007 Nobel laureate for literature. The novel proves to be highly anticipatory in many respects. Firstly, the “eclectic realism” characterizing its formal aspect paves the way to Lessing’s future aesthetic experimentalism and stylistic innovations. Moreover, it also displays several interconnected thematic correspondences with the main motifs informing its author’s entire production and testifies to the oppositional, if not subversive, nature of her works with respect to the normative symbolic foundations of so…
Doris Lessing
2008
Sensorless induction machine drive for fly-wheel generation unit based on a TLS-based non-linear observer
2016
This paper proposes a sensorless technique for an induction machine Flywheel Energy Storage System (FESS) based on a non-linear observer integrated with a total least-squares speed estimator taking into consideration the IM (Induction Machine) saturation effects. The nonlinear observer is based on an original formulation of the dynamic model of the IM including the magnetic saturation, rearranged in a space-state form, after assuming as state variables the stator current and the rotor magnetizing current space-vectors in the stator reference frame. The choice of the observer gain has been made by the use of Lyapunov's method. The speed signal needed by the non-linear observer for the flux e…
L’immagine dei Normanni di Sicilia nella letteratura latina del XII secolo
2016
La dominazione normanna della Sicilia e dell'Italia meridionale, fra XI e XII secolo, è stata letta e interpretata in vario modo dagli scrittori contemporanei, sia quelli di parte bizantina, sia quelli occidentali. In questo saggio, dopo una breve premessa concernente i principali fatti storici e le relative fonti bizantine, ci si concentra sulla disamina di alcuni fra i principali scrittori e poeti che, tra la fine dell'XI e tutto il XII secolo, si sono occupati della dominazione normanna di Sicilia, cercando di individuare e di illustrare, caso per caso, la visione che essi ebbero dei Normanni conquistatori. Si discorre qui, nell'ordine, di Amato da Montecassino, Goffredo Malaterra, Gugli…