Results 41 to 50 of about 2,358,795 (324)

Development of an improved acm scheme for mitigating earth-to-space propagation effects

open access: yesArid Zone Journal of Engineering, Technology and Environment, 2021
Satellite communication is a promising technology due to its ability to serve very large number of users with high data rate services. The communication link experiences propagation losses such as: Path loss, atmospheric losses, rain fading, ionosphere ...
A. M. S. Tekanyi   +4 more
doaj  

Relay-Induced Error Propagation Reduction for Decode-and-Forward Cooperative Communications [PDF]

open access: yes, 2010
An attractive hybrid method of mitigating the effects of error propagation that may be imposed by the relay node (RN) on the destination node (DN) is proposed.
Hanzo, Lajos, Liang, Dandan, Ng, Soon
core   +1 more source

Synthetic Cell‐Based Tissues for Bottom‐Up Assembly of Artificial Lymphatic Organs

open access: yesAdvanced Healthcare Materials, EarlyView.
Synthetic cells have emerged as a novel biomimetic approach for fundamental research and therapeutic interventions. T cell activating synthetic cells are able to form 3D tissue‐like structures by self‐assembly into lymphatic bottom‐up tissues (lymphBUT) with tunable biochemical and biomechanical functionalities as well as metabolic activity are ...
Anna Burgstaller   +5 more
wiley   +1 more source

FTTH Network Expansion Modeling and Link Budget for Housing Locations

open access: yesInternational Journal of Electrical, Energy and Power System Engineering, 2019
The location of the research was carried out at Villa Melati Permai II Housing which is on the Melati Indah Street, Tampan District, Pekanbaru City.
Ery Safrianti, Widyantoro Tejo Mukti
doaj   +1 more source

BER of MRC for M-QAM with imperfect channel estimation over correlated Nakagami-m fading [PDF]

open access: yes, 2009
In this contribution, we provide an exact BER analysis for M-QAM transmission over arbitrarily correlated Nakagami-m fading channels with maximal-ratio combining (MRC) and imperfect channel estimation at the receiver.
Alexandropoulos, George C   +3 more
core   +1 more source

FWM-based wavelength conversion of 40 Gbaud PSK signals in a silicon germanium waveguide

open access: yes, 2013
We demonstrate four wave mixing (FWM) based wavelength conversion of 40 Gbaud differential phase shift keyed (DPSK) and quadrature phase shift keyed (QPSK) signals in a 2.5 cm long silicon germanium waveguide.
Bogris, Adonis   +10 more
core   +1 more source

Organic Bulk‐Heterojunction‐Integrated Flexible Perovskite Photodetection Arrays for High‐Speed Broadband Optical Communication

open access: yesAdvanced Science, EarlyView.
A flexible broadband photodetector is realized by integrating a perovskite with an organic bulk‐heterojunction. It achieves high external quantum efficiency (EQE) (>80% visible, >60% near‐infrared (NIR)), ultralow dark current, and fast response, enabling self‐powered, high‐detectivity operation.
Xin Hong   +9 more
wiley   +1 more source

Determination of Genome Size and Chromosome Number of a Ziziphus Species (Z. mauritiana Lam.) from Eastern Senegal

open access: yesHortTechnology, 2022
Ziziphus mauritiana Lam. is a widespread shrub or tree of the Sahel region, where it grows wild and is used for various purposes, including nutrition, medicine, and firewood.
Hamidou F. Sakhanokho   +2 more
doaj   +1 more source

ACSL5 Regulates Glucose Metabolism and Chemotherapy Sensitivity in Colorectal Cancer Cells under Glutamine Deficiency

open access: yesAdvanced Science, EarlyView.
Glutamine deprivation triggers ACSL5 upregulation in tumor cells, sustaining their viability via dual metabolic rewiring programs. ACSL5 enhances glycolysis by relieving p53's inhibition of PGAM1 while also sustaining mitochondrial respiration and TCA cycle flux through promoting IDH2 dimerization.
Shuai Tian   +11 more
wiley   +1 more source

BER of high-speed OFDM systems in the presence of offset mismatch of TI-ADCs [PDF]

open access: yes, 2015
Time-interleaved analog-to-digital converters (TI-ADCs) are widely used for multi-Gigabit orthogonal frequency division multiplexing (OFDM) systems because of their attractive high sampling rate and high resolution. However, in practice, offset mismatch,
Huynh, Vo Trung Dung   +2 more
core  

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