Results 51 to 60 of about 1,188,877 (313)

A Double-Threshold Based Spectrum Allocation Algorithm in Cognitive Radio System

open access: yesDianxin kexue, 2013
Based on the spectrum allocation of Underlay model in cognitive radio systems,a double-threshold based spectrum allocation algorithm was proposed.Two signal-to-noise radio(SNR)thresholds were also given.If SNR is less than the small threshold,aiming to ...
Jiongtao Wang   +3 more
doaj   +2 more sources

Ultra-high energy cosmic rays: 40 years retrospective of continuous observations at the Yakutsk array: Part 1. Cosmic ray spectrum in the energy range 1015–1018 eV and its interpretation

open access: yesEPJ Web of Conferences, 2015
The experimental data on the cosmic ray energy spectrum obtained from the Small Cherenkov Array in Yakutsk on the measurement of Cherenkov radiation in showers with energy 1015–1018 eV are discussed.
Knurenko Stanislav   +3 more
doaj   +1 more source

XXXIX. On the second spectrum of hydrogen [PDF]

open access: yesThe London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1884
n ...
openaire   +2 more sources

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

World radiocommunication conference 12 : implications for the spectrum eco-system

open access: yes, 2012
Spectrum allocation is once more a key issue facing the global telecommunications industry. Largely overlooked in current debates, however, is the World Radiocommunication Conference (WRC).
Irvine, James   +2 more
core   +1 more source

On Airy Solutions of the Second Painleve Equation [PDF]

open access: yes, 2016
In this paper, we discuss Airy solutions of the second Painleve equation and two related equations, the Painleve XXXIV equation and the Jimbo-Miwa-Okamoto sigma form of second Painleve equation, are discussed.
Clarkson, Peter
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

Force-Feeding: Consumption and Sexuality in Frank G. Paci\u27s Black Madonna

open access: yes, 2023
Informed by calls to re-evaluate the relationship between Canadian literature and power in the wake of Canada’s sesquicentennial, this paper examines Frank G.
Paulgaard, Shelby
core   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

open access: yesFEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto   +3 more
wiley   +1 more source

Ocean Surface Cross Section for Bistatic HF Radar Incorporating a Six DOF Oscillation Motion Model

open access: yesRemote Sensing, 2019
To investigate the characteristics of sea clutter, based on ocean surface electromagnetic scattering theory, the first- and second-order ocean surface scattering cross sections for bistatic high-frequency (HF) radar incorporating a multi-frequency six ...
Guowei Yao, Junhao Xie, Weimin Huang
doaj   +1 more source

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