Results 21 to 30 of about 123,498 (227)

Synthesis‐free backscatter directional modulation communication using Van‐Atta arrays

open access: yesIET Microwaves, Antennas & Propagation, 2022
Backscatter communication, an emerging ultra‐low‐power wireless communication paradigm, has been studied as a promising solution for wireless communications in some Internet‐of‐Things (IoT) applications.
Gaojian Huang   +4 more
doaj   +1 more source

Investigating the impact of image content on the energy efficiency of hardware-accelerated digital spatial filters [PDF]

open access: yes, 2019
Battery-operated low-power portable computing devices are becoming an inseparable part of human daily life. One of the major goals is to achieve the longest battery life in such a device.
Badii, Atta, Raval, Rajkumar K.
core   +1 more source

Learning through the waste: olfactory cues from the colony refuse influence plant preferences in foraging leaf-cutting ants [PDF]

open access: yes, 2016
Leaf-cutting ants learn to avoid plants initially harvested if they proved to be harmful for their symbiotic fungus once incorporated into the nest.
Arenas, Andres, Roces, Flavio
core   +1 more source

Getting creative in the languages classroom [PDF]

open access: yes, 2020
The following principles are central to the work of ‘Linguistic Creativity in Language Learning’, a research strand of Creative Multilingualism: We create language every day. Language diversity facilitates creative diversity.
Fisher, Linda   +3 more
core   +1 more source

Structure of unsteady stably stratified turbulence with mean shear. [PDF]

open access: yes, 2004
The statistics of unsteady turbulence with uniform stratification N (Brunt–Väisälä frequency) and shear α(=dU1/dx3) are analysed over the entire time range (00 and \it Ri>0.25 respectively, oscillatory momentum and positive and negative density fluxes ...
Hanazaki, H, Hunt, JCR
core   +1 more source

Multidimensional reconciliation for continuous-variable quantum key distribution [PDF]

open access: yes, 2008
We propose a method for extracting an errorless secret key in a continuous-variable quantum key distribution protocol, which is based on Gaussian modulation of coherent states and homodyne detection.
A. D. Wyner   +9 more
core   +7 more sources

Tracer Applications of Noble Gas Radionuclides in the Geosciences

open access: yes, 2013
The noble gas radionuclides, including 81Kr (half-life = 229,000 yr), 85Kr (11 yr), and 39Ar (269 yr), possess nearly ideal chemical and physical properties for studies of earth and environmental processes.
Fischer, T. P.   +10 more
core   +3 more sources

A complementary view on the growth of directory trees [PDF]

open access: yes, 2009
Trees are a special sub-class of networks with unique properties, such as the level distribution which has often been overlooked. We analyse a general tree growth model proposed by Klemm {\em et.
A. Rokas   +23 more
core   +2 more sources

A spectroscopic study of the cycling transition 4s[3/2]_2-4p[5/2]_3 at 811.8 nm in Ar-39: Hyperfine structure and isotope shift [PDF]

open access: yes, 2010
Doppler-free saturated absorption spectroscopy is performed on an enriched radioactive Ar-39 sample. The spectrum of the 3s^2 3p^5 4s [3/2]_2 - 3s^2 3p^5 4p [5/2]_3 cycling transition at 811.8 nm is recorded, and its isotope shift between Ar-39 and Ar-40
Lu, Z. -T.   +5 more
core   +3 more sources

A New Method of Measuring 81Kr and 85Kr Abundances in Environmental Samples

open access: yes, 2003
We demonstrate a new method for determining the 81Kr/Kr ratio in environmental samples based upon two measurements: the 85Kr/81Kr ratio measured by Atom Trap Trace Analysis (ATTA) and the 85Kr/Kr ratio measured by Low-Level Counting (LLC).
B. E. Lehmann   +12 more
core   +1 more source

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