Results 11 to 20 of about 44,917 (242)
Mathematical modeling of the infiltration in a permeable pavement on the field scale
RBRH, 2020 Permeable pavement (PP) is an alternative for the management of urban rainwater that allows the reduction of effective precipitation through the infiltration process. In this study was evaluated the infiltration capacity of a PP of hollow concrete blocks
Marília Neves Marinho +5 more
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Exchange PF-rings and almost PP-rings
International Journal of Mathematics and Mathematical Sciences, 1989 Let R be a commutative ring with unity. In this paper, we prove that R is an almost PP–PM–ring if and only if R is an exchange PF–ring. Let X be a completely regular Hausdorff space, and let βX be the Stone Čech compactification of X.
H. Al-Ezeh
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On some properties of polynomials rings
International Journal of Mathematics and Mathematical Sciences, 1987 For a commutative ring with unity R, it is proved that R is a PF-ring if and only if the annihilator, annR(a), for each a ϵ R is a pure ideal in R, Also it is proved that the polynomial ring, R[X], is a PF-ring if and only if R is a PF-ring.
H. Al-Ezeh
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Perchloratobis[1-(1,10-phenanthrolin-2-yl)-2-pyridone]zinc(II) perchlorate
Acta Crystallographica Section E, 2009 In the title mononuclear complex, [Zn(ClO4)(C17H11N3O)2]ClO4, the ZnII ion is coordinated in a distorted octahedral geometry. The dihedral angles between the pyridine rings and the mean planes of the 1,10-phenanthroline ring system in each of the 1-(1,10-
Qing Ru Zhao, Qi Sheng Liu, Qing Yun Liu
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A GENERALIZATION OF PP-RINGS AND p.q.-BAER RINGS [PDF]
Glasgow Mathematical Journal, 2006 We introduce the concept of left APP-rings which is a generalization of left p.q.-Baer rings and right PP-rings, and investigate its properties. It is shown that the APP property is inherited by polynomial extensions and is a Morita invariant property.
LIU ZHONGKUI, ZHAO RENYU
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Mary Douglas. Thinking in Circles. An Essay on Ring Composition
Suomen Antropologi, 2008 MARY DOUGLAS. Thinking in Circles. An Essay on Ring Composition. New Haven: Yale University Press, 2007. Pp. 192. ISBN 978-0-300-11762-2 (cloth).
Janne Juhana Rantala
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Some Extensions of Generalized Morphic Rings and EM-rings
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2018 Let R be a commutative ring with unity. The main objective of this article is to study the relationships between PP-rings, generalized morphic rings and EM-rings. Although PP-rings are included in the later rings, the converse is not in general true.
Ghanem Manal, Abu Osba Emad
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Two properties of the power series ring
International Journal of Mathematics and Mathematical Sciences, 1988 For a commutative ring with unity, A, it is proved that the power series ring A〚X〛 is a PF-ring if and only if for any two countable subsets S and T of A such that S⫅annA(T), there exists c∈annA(T) such that bc=b for all b∈S.
H. Al-Ezeh
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Survival Rate of Cells Sent by a Low Mechanical Load Tube Pump: The “Ring Pump”
Micromachines, 2020 A ring pump (RP) is a useful tool for microchannels and automated cell culturing. We have been developing RPs (a full-press ring pump, FRP; and a mid-press ring pump, MRP).
Kaoru Uesugi +7 more
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Polypropylene-based graft copolymers via CuAAC click chemistry
eXPRESS Polymer Letters, 2018 Graft copolymers from commercial chlorinated polypropylene (PP-Cl) possessing either poly(ethylene glycol) (PEG) or poly(ε-caprolactone) (PCL) grafts are synthesized by copper (I)-catalyzed azide-alkyne cycloaddition ‘click’ reaction (CuAAC).
G. Acik, E. Sey, M. A. Tasdelen
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