Though it is vital to estimate infiltration as one of the key factors in effective management of water resources, only few studies have been carried out either to determine the infiltration or to compare the performance of infiltration models for coarse textured soils. Thus, the present study was conducted to accomplish two objectives. First to estimate the Horton’s infiltration model parameter...

We use quivers and their representations to bring new perspectives on the subregular J-ring JC of a Coxeter system (W,S), subring Lusztig's J-ring. prove that is isomorphic suitable quotient path algebra double quiver (W,S). Up Morita equivalence, such quotients include group algebras all free products finite cyclic groups. then study category mod-AK dimensional right modules AK=K⊗ZJC over an a...

I would like to thank Mr J. R. Armstrong for permission to publish this case. References BROOKES, M. (1960) Sequelae of experimental partial ischaemia in long bones of the rabbit. J. Anat. (Lond.), 94, 552. BROWNE, D. (1936) Congenital deformities of mechanical origin. Proc. R. Soc. Med. 29, 1409. RING, P.A. (1959) Congenital shortening of the femur. J. Bone Jt Surg. 41 B, 73. RING, P.A. (1961)...

Let R be a ring with Jacobson ideal J and center C. McCoy and Montgomery introduced the concept of a p-ring (p prime) as a ring R of characteristic p such that xp = x for all x in R. Thus, Boolean rings are simply 2-rings (p = 2). It readily follows that a p-ring (p prime) is simply a ring R of prime characteristic p such that R ⊆ N + Ep, where N = {0} and Ep = {x ∈ R : xp = x}. With this as mo...

An element is known a strongly nil* clean if a=e1 - e1e2 + n , where e1,e2 are idempotents and nilpotent, that commute with one another. ideal I of ring R called each element. We investigate some its fundamental features, as well relationship to the nil ideal.

The rings considered in this article are commutative with identity. For an ideal $I$ of a ring $R$, we denote the annihilator $R$ by $Ann(I)$. An is said to be exact annihilating if there exists non-zero $J$ such that $Ann(I) = J$ and $Ann(J) I$. set all ideals $\mathbb{EA}(R)$ $\mathbb{EA}(R)\backslash \{(0)\}$ $\mathbb{EA}(R)^{*}$. Let $\mathbb{EA}(R)^{*}\neq \emptyset$. With [Exact Annihilat...

A convenient, efficient and practical procedure for the synthesis of 1-amidoalkyl 2-naphthols is described by condensation of aromatic aldehydes with amides and 2-naphthol in the presence of P2O5/SiO2 as an efficient catalyst. Moreover, in the present of this catalyst, the synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes is studied by co...

• I will use the usual Ulam-Harris labelling notation for GW trees. Namely the initial ancestor is labelled ∅. An individual u = (u1, ..., un) is understood to be the un-th descendend of .... of u1-th descendent of ∅. Such an individual has the property that |u| = n meaning that it belongs to the n-th generation. We say that u < v if individual v is a descendent of u and one may concatenate lab...

in this paper, we investigate various kinds of extensions of twin-good rings. moreover, we prove that every element of an abelian neat ring r is twin-good if and only if r has no factor ring isomorphic to z2  or z3. the main result of [24] states some conditions that any right self-injective ring r is twin-good. we extend this result to any regular baer ring r by proving that every element of a...

[1] Analysis of high resolution Moon Mineralogy Mapper (M) data reveals the presence of a prominent Mg‐spinel‐rich lithology in the central peaks of Theophilus crater on the lunar nearside. Other peak‐associated lithologies are comprised of plagioclase, olivine, and pyroxene‐bearingmaterials. A consistent spatial association of Mg‐spinel with mafic‐free anorthosite is recognized. Documentation ...