Results 31 to 40 of about 3,388,611 (277)
A Sensing Error Aware MAC Protocol for Cognitive Radio Networks [PDF]
, 2011 Cognitive radios (CR) are intelligent radio devices that can sense the radio environment and adapt to changes in the radio environment. Spectrum sensing and spectrum access are the two key CR functions.
Hu, Donglin, Mao, Shiwen
core +2 more sources
Annali di Matematica Pura ed Applicata (1923 -), 2022 AbstractWe improve results of Baouendi, Rothschild and Treves and of Hill and Nacinovich by finding a much weaker sufficient condition for a CR manifold of type (n, k) to admit a local CR embedding into a CR manifold of type $$(n+\ell ,k-\ell )$$ ( n + ℓ
Cowling, MG +3 more
openaire +4 more sources
International Journal of Mathematics, 2021 We say that a CR singular submanifold [Formula: see text] has a removable CR singularity if the CR structure at the CR points of [Formula: see text] extends through the singularity as an abstract CR structure on [Formula: see text]. We study such real-analytic submanifolds, in which case removability is equivalent to [Formula: see text] being the ...
Lebl, Jiří +2 more
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A Simple, Accurate and Highly Secure Method to Encrypt-Decrypt Digital Images
JOIV: International Journal on Informatics Visualization, 2020 The digital image may be important and has a secret character, which requires not understanding it when looking at the naked eye or not understanding the contents. So seeking a method of digital image encryption-decryption is a very important task.
Jamil Azzeh, Ziad Alqadi, Qazem Jaber
doaj +1 more source
Mineral Utilization in Rams Fed Ration Supplemented with Different Levels of Chromium, Calcium, and Cation-Anion Balances [PDF]
, 2011 Chromium (Cr) is an essential mineral for ruminants. Its metabolism and interactions with other minerals has not been widely known. This experiment was designed to evaluate the utilization of minerals and growth of Garut ram fed ration supplemented with ...
Amir, F. (F) +5 more
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On the Lichnerowicz conjecture for CR manifolds with mixed signature [PDF]
, 2018 We construct examples of nondegenerate CR manifolds with Levi form of signature $(p,q)$, $2\leq p\leq q$, which are compact, not locally CR flat, and admit essential CR vector fields. We also construct an example of a noncompact nondegenerate CR manifold
Chern +15 more
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Inflexible CR submanifolds [PDF]
Mathematische Zeitschrift, 2016 to appear in Math ...
Brinkschulte, Judith, Denson Hill, C.
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, 2015 Segregation, precipitation, and phase separation in Fe-Cr systems is investigated. Monte Carlo simulations using semiempirical interatomic potential, first-principles total energy calculations, and experimental spectroscopy are used. In order to obtain a
Dahl, J. +12 more
core +1 more source
Non locally trivializable $CR$ line bundles over compact Lorentzian $CR$ manifolds [PDF]
, 2017 We consider compact $CR$ manifolds of arbitrary $CR$ codimension that satisfy certain geometric conditions in terms of their Levi form. Over these compact $CR$ manifolds, we construct a deformation of the trivial $CR$ line bundle over $M$ which is ...
Brinkschulte, Judith, Hill, C. Denson
core +3 more sources