Results 221 to 230 of about 3,780,505 (270)

Low Prevalence and Abundance of <i>Akkermansia</i> in Older Japanese Adults: Inverse Association with a Noodle-Based Dietary Pattern but Not with Physical Function. [PDF]

Microorganisms
Naito Y, Kitae H, Mizushima K, Ouchi N, Adachi A, Kamitani T, Narumoto J, Kitani T, Matoba S, Inoue R, Takagi T.   +10 more
europepmc   +1 more source

Effects of CTCF on the regulatory landscape of the mouse Sox2 locus

Eder M, Moene CJ, Kaagman M, Braccioli L, de Wit E, van Steensel B.   +5 more
europepmc   +1 more source

Computer Games on the Development of Physical Motor Skills and Social Interaction in Preschool Children: Quasi-Experimental Study. [PDF]

JMIR Form Res
Chang IC, Yen CE.
europepmc   +1 more source

Identification and characterization of two new markers for differentiating fall armyworm strains across the Western Hemisphere. [PDF]

PLoS One
Nagoshi RN, Tessnow AE, Meagher RL.
europepmc   +1 more source

Sets of Optimal Frequency-Hopping Sequences

IEEE Transactions on Information Theory, 2008
In communication systems, frequency-hopping spread spectrum and direct-sequence spread spectrum are two main spread coding technologies. Frequency-hopping sequences are needed in FH-CDMA systems. In this correspondence, three algebraic constructions of sets of optimal frequency-hopping sequences are presented.
Jianxing Yin
exaly   +4 more sources

Algebraic Constructions of Optimal Frequency-Hopping Sequences

IEEE Transactions on Information Theory, 2007
Frequency-hopping (FH) spread spectrum and direct-sequence spread spectrum are two main spread-coding technologies. Frequency-hopping sequences are needed in FH code-division multiple-access (CDMA) systems. In this correspondence, three classes of optimal frequency-hopping sequences are constructed with algebraic methods. The three classes are based on
Cunsheng Ding, Marko J. Moisio, Jin Yuan
exaly   +5 more sources

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Chaotic frequency hopping sequences

IEEE Transactions on Communications, 1998
This letter describes a novel family of frequency hopping sequences generated by chaotic systems. The sequences give a uniform spread over the entire frequency bandwidth. In addition to having good Hamming correlation properties, they possess ideal linear span.
Ling Cong
exaly   +3 more sources

Optimal Frequency-Hopping Sequences Via Cyclotomy

IEEE Transactions on Information Theory, 2005
Using cyclotomic numbers, a simple construction is presented for frequency-hopping (FH) sequences having optimal autocorrelation with respect to the well-known Lempel-Greenberger bound. Some optimal families of FH sequences are constructed. The simplicity of this technique makes it attractive for practical use.
Wensong Chu, C J Colbourn
exaly   +3 more sources

Optimal Frequency-Hopping Sequences With New Parameters

IEEE Transactions on Information Theory, 2010
A frequency-hopping sequence (FHS) of length v and frequency set size M is called a (v,M,?)-FHS if its maximum out-of-phase Hamming autocorrelation is ?. Three new classes of optimal FHSs with respect to the Lempel-Greenberger bound are presented in this paper.
Kyeongcheol Yang
exaly   +3 more sources

New family of hopping sequences for time/frequency-hopping CDMA systems

IEEE Transactions on Wireless Communications, 2005
In this paper, a new family of hopping sequences with very large family size suitable for use in time/frequency-hopping (TH/FH) code-division multiple-access (CDMA) systems is proposed and investigated. The construction of the new hopping sequences is based upon the polynomial theory over the finite field, and the new hopping sequences are called the ...
Pingzhi Fan, Daiyuan Peng
exaly   +3 more sources