Results 221 to 230 of about 1,527,991 (269)
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Spreads which are Not Dual Spreads
Canadian Mathematical Bulletin, 1969In this note we show the existence of a spread which is not a dual spread, thus answering a question in [1]. We also obtain some related results on spreads and partial spreads.Let ∑ = PG(2t-l, F) be a projective space of odd dimension (2t-l, ≥2) over the field F. In accordance with [1] we make the following definitions.
Bruen, A., Fisher, J. C.
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2019
Abstract This chapter deals with how parthenium weed (Parthenium hysterophorus), with a humble origin in the neotropics, has ended up as a global weed with a pantropical distribution spreading across about 48 countries in the last five to six decades.
Asad Shabbir +2 more
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Abstract This chapter deals with how parthenium weed (Parthenium hysterophorus), with a humble origin in the neotropics, has ended up as a global weed with a pantropical distribution spreading across about 48 countries in the last five to six decades.
Asad Shabbir +2 more
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Improving information spread by spreading groups
Online Information Review, 2019Purpose The purpose of this paper is to propose a novel method to enhance the spread of messages in social networks by “Spreading Groups.” These sub-structures of highly connected accounts intentionally echo messages between the members of the subgroup at the early stages of a spread.
Alon Sela +3 more
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To spread or not to spread in a wireless data network
GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2002Performance comparisons are provided for different receivers in a time-slotted mobile network designed to carry delay-insensitive traffic. We show that even with one user per timeslot, capacity gains are achieved from some degree of spreading and multiuser detection against no-spreading and also against spreading plus matched filtering.
John Leung, Stephen V. Hanly
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Archives of Insect Biochemistry and Physiology, 1999
In most Lepidoptera, plasmatocytes and granulocytes are the two hemocyte classes capable of adhering to foreign targets. Previously, we identified plasmatocyte spreading peptide (PSP1) from the moth Pseudoplusia includens and reported that it induced plasmatocytes to rapidly spread on foreign surfaces.
M R, Strand, K D, Clark
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In most Lepidoptera, plasmatocytes and granulocytes are the two hemocyte classes capable of adhering to foreign targets. Previously, we identified plasmatocyte spreading peptide (PSP1) from the moth Pseudoplusia includens and reported that it induced plasmatocytes to rapidly spread on foreign surfaces.
M R, Strand, K D, Clark
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To spread or not to spread, this is the question
Proceedings of IEEE Vehicular Technology Conference (VTC), 2002TDMA and DS-CDMA are two access methods proposed for digital cellular systems and given the status of standard in the U.S. It is shown in this paper that a capacity comparison between them is scenario specific. In the case of terrestrial cellular CDMA is the winner, whereas in the scenario of a single isolated cell, or for a satellite based cellular ...
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To Spread or Not to Spread – the Myths of Optical CDMA
Optical Fiber Communication Conference and International Conference on Quantum Information, 2001In a spread spectrum system, the signal is transmitted using a bandwidth much larger than that required for the transmitted data. By spreading the signal energy over a very broad bandwidth, one can obtain a multitude of benefits. Firstly, one can make the signal difficult to detect by lowering its spectral density and hiding it under noise.
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Journal of Mathematical Biology, 2004
Pattern organisation of cells and tissue are specified during embryonic development by gradients of morphogens, substances that assign different fates of cells at different concentrations. Morphogen gradients form by transport from a localized site. Whether this occurs by diffusion or some other more elaborate mechanism is controversial.
Merkin, J. H., Sleeman, B. D.
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Pattern organisation of cells and tissue are specified during embryonic development by gradients of morphogens, substances that assign different fates of cells at different concentrations. Morphogen gradients form by transport from a localized site. Whether this occurs by diffusion or some other more elaborate mechanism is controversial.
Merkin, J. H., Sleeman, B. D.
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The Journal of Business, 1988
This article does four things: it calls attention to an important phenomenon heretofore unmentioned in the literature, that is, the dividend spread; it presents open-interest and early-exercise d ata for in-the-money calls around ex dividend dates; it demonstrates that previous results concerning the efficiency of the options market around the ex ...
Castanias, Rick +2 more
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This article does four things: it calls attention to an important phenomenon heretofore unmentioned in the literature, that is, the dividend spread; it presents open-interest and early-exercise d ata for in-the-money calls around ex dividend dates; it demonstrates that previous results concerning the efficiency of the options market around the ex ...
Castanias, Rick +2 more
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Nature Medicine, 2011
The term spreading depolarization describes a wave in the gray matter of the central nervous system characterized by swelling of neurons, distortion of dendritic spines, a large change of the slow electrical potential and silencing of brain electrical activity (spreading depression).
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The term spreading depolarization describes a wave in the gray matter of the central nervous system characterized by swelling of neurons, distortion of dendritic spines, a large change of the slow electrical potential and silencing of brain electrical activity (spreading depression).
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