Results 81 to 90 of about 141,576 (218)

QoSatAr: a cross-layer architecture for E2E QoS provisioning over DVB-S2 broadband satellite systems [PDF]

open access: yes, 2012
This article presents QoSatAr, a cross-layer architecture developed to provide end-to-end quality of service (QoS) guarantees for Internet protocol (IP) traffic over the Digital Video Broadcasting-Second generation (DVB-S2) satellite systems.
C Caini   +21 more
core   +1 more source

Sol–Gel Derived Polymer Precursors for Stereolithography of ZrC

open access: yesAdvanced Engineering Materials, EarlyView.
ZrC is a critical material target for extreme temperature conditions. This report describes a protocol for preparing ZrC ceramics via stereolithography and examines the impact of the polymer matrix on carbothermal reduction and mechanical stability of 3D printed ZrC.
Charles J. Rafalko   +2 more
wiley   +1 more source

Battery Degradation Maps for Power System Optimization and as a Benchmark Reference

open access: yes, 2017
This paper presents a novel method to describe battery degradation. We use the concept of degradation maps to model the incremental charge capacity loss as a function of discrete battery control actions and state of charge.
Andersson, Göran, Fortenbacher, Philipp
core   +1 more source

Atomic cobalt as an efficient electrocatalyst in sulfur cathodes for superior room-temperature sodium-sulfur batteries

open access: yesNature Communications, 2018
Room-temperature sodium-sulfur batteries hold promise, but are hindered by low reversible capacity and fast capacity fade. Here the authors construct a multifunctional sulfur host comprised of cobalt-decorated carbon nanospheres that impart attractive ...
Bin-Wei Zhang   +11 more
doaj   +1 more source

A novel approach for battery longevity through controlled surface lithium concentration gradient

open access: yesNext Energy
One of the key challenges in battery degradation is mechanical failure, such as cracks and delamination, caused by stress from lithium concentration gradients inside active particles.
Kasim (Kaz) A. Adewuyi
doaj   +1 more source

NiH2 capacity fade during early cycling [PDF]

open access: yes
Tests were conducted on nickel hydrogen batteries to determine the charge efficiency of the nickel electrode as a function of rate and temperature, cell discharge capacity, and capacity fade.
Zagrodnik, Jeffrey P.
core   +1 more source

Next Generation High Throughput Satellite System [PDF]

open access: yes, 2012
This paper aims at presenting an overview of the state-of-the-art in High Throughput Satellite (HTS) systems for Fixed Satellite Services (FSS) and High Density-FSS.
Alberty, Eric   +5 more
core   +1 more source

Capacity of fading channelwith no side information

open access: yesElectronics Letters, 1997
A supremum to the Shannon capacity of a Rayleigh fading channel without side information (SI) is computed using variational methods and is shown to be asymptotically achievable for signal-to-noise ratios (SNRs) approaching either zero or infinity.
G. Taricco, M. Elia
openaire   +1 more source

Remaining Useful Life Prediction for Lithium-Ion Batteries Based on Hybrid Ensembles Allied with Data-Driven Approach

open access: yesEnergies
Capacity fade in lithium-ion batteries (LIBs) poses challenges for various industries. Predicting and preventing this fade is crucial, and hybrid methods for estimating remaining useful life (RUL) have become prevalent and achieved significant ...
Shuai Zhao   +3 more
doaj   +1 more source

Future transmitter/receiver diversity schemes in broadcast wireless networks [PDF]

open access: yes, 2006
An open diversity architecture for a cooperating broadcast wireless network is presented that exploits the strengths of the existing digital broadcast standards.
Bard, M, Cosmas, J, Song, Y H, Zhang, Y
core   +1 more source

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