Results 21 to 30 of about 33,349,805 (332)
People and Nature, 2023 Adder ( Vipera berus ) populations are experiencing declines in many countries, including the United Kingdom. Perceptions of adders and other venomous snakes are generally negative, making conservation of these species a challenge, and persecution ...
Sam J. Kelly +5 more
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SOME FUNDAMENTAL PROPERTIES OF HEAPS
Barekeng, 2023 Heap is defined to be a non-empty set with ternary operation satisfying associativity, that is for every and satisfying Mal’cev identity, that is for all . There is a connection between heaps and groups.
Dwi Mifta Mahanani, Dewi Ismiarti
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An experimental evaluation of grouping definitions for moving entities
Journal of Spatial Information Science, 2022 One important pattern analysis task for trajectory data is to find a group: a set of entities that travel together over a period of time. In this paper, we compare four definitions of groups by conducting extensive experiments using various data sets ...
Lionov Wiratma +3 more
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Ultraluminous X-ray Sources and Their Nebulae [PDF]
, 2008 One of the interesting features of Ultraluminous X-ray sources is that many of them are surrounded by luminous nebulae exhibiting diverse observational properties. In different cases the nebulae are photoionized or shock-powered.
Magnus Axelsson, Pavel Abolmasov
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Test groups for Whitehead groups
Rocky Mountain Journal of Mathematics, 2012 We consider the question of when the dual of a Whitehead group is a test group for Whitehead groups. This turns out to be equivalent to the question of when the tensor product of two Whitehead groups is Whitehead. We investigate what happens in different models of set theory.
Eklof, Paul C. +2 more
openaire +3 more sources
Methylation of Eugenol Using Dimethyl Carbonate and Bentonite as Catalyst
Indonesian Journal of Chemistry, 2015 Eugenol is a compound with a variety of reactive functional groups such as allyl, hydroxy and methoxy. The presence of the functional groups brings eugenol possible to undertake the transformation into various derivative compounds with diverse activities.
Dina Asnawati +5 more
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Circular groups, planar groups, and the Euler class [PDF]
, 2004 We study groups of C^1 orientation-preserving homeomorphisms of the plane, and pursue analogies between such groups and circularly-orderable groups.
Calegari, Danny
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EURASIP Journal on Wireless Communications and Networking, 2020 Traditional rogue access-point (AP) detection mechanisms are employed in network administration to protect network infrastructure and organization; however, these mechanisms do not protect end users from connecting to a rogue-AP.
Songrit Kitisriworapan +2 more
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Which finite simple groups are unit groups? [PDF]
, 2014 We prove that if $G$ is a finite simple group which is the unit group of a ring, then $G$ is isomorphic to either (a) a cyclic group of order 2; (b) a cyclic group of prime order $2^k -1$ for some $k$; or (c) a projective special linear group $PSL_n ...
Davis, Christopher, Occhipinti, Tommy
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Education Sciences, 2022 Prior research has shown how incorporating group theory into upper secondary school or undergraduate mathematics education may positively impact learners’ conceptual understanding of mathematics in general and algebraic concepts in particular.
Joaquin Marc Veith +2 more
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