Current researches have showed that N3, N5-diaryl-2, 6-dimethyl -1, 4-dihydropyrine-3, 5- dicarboxamide analogues demonstrate notable anti-tubercular activity. In this study, Hantzsch condensation was used to design and synthesize new analogues of dihydropyridine (DHP). Different diary carboxamides were inserted at positions 3 and 5 of the DHP ring. 4(5)-chloro-2-ethyl-5(4)-imidazolyl moiety wa...

In this paper, we study fuzzy substructures in connection withHv-structures. The original idea comes from geometry, especially from thetwo dimensional Euclidean vector space. Using parameters, we obtain a largenumber of hyperstructures of the group-like or ring-like types. We connect,also, the mentioned hyperstructures with the theta-operations to obtain morestrict hyperstructures, as Hv-groups...

Let G be a compact Lie group and kG a G spectrum (as defined in [3, Section I.2]). Greenlees and May ([2]) have defined an associated G-spectrum t(kG) called the Tate spectrum. They observe that if kG is a ring G-spectrum then there is an induced ring G-spectrum structure on t(kG), and that if kG is homotopy-commutative then t(kG) will also be homotopycommutative (see [2, Proposition 3.5]). It ...

The dichotomic physical quantities, also called propositions, can be naturally associated to maps of the set of states into the real interval [0,1]. We show that the structure of effect algebra associated to such maps can be represented by quasiring structures, which are a generalization of Boolean rings, in such a way that the ring operation of addition can be non-associative and the ring mult...

AAA+ proteins form large, ring-shaped complexes, which act as energy-dependent unfoldases of macromolecules. Many crystal structures of proteins in this superfamily have been determined, but mostly in monomeric or non-physiological oligomeric forms. The assembly of ring-shaped complexes from monomer coordinates is, therefore, of considerable interest. We have extracted structural features of co...

This paper discusses the basic concepts, and presents some preliminary results, of an approach towards the development of homogeneous arrays for massively parallel VLSI computation of Digital Signal Processing algorithms. The generation of such arrays is made possible by computing over finite rings, rather than weighted magnitude systems, such as binary, and by performing the computations at th...

We have fabricated three-quarter ring structures on silicon nitride membranes for magnetic domain imaging using Lorentz electron microscopy. The ring structures have linewidths of 100, 250, 350 and 700 nm, and outer diameters of 1.65mm. Using the Foucault imaging mode, we have observed the magnetic domain configurations in ring structures with an inter-ring separation of 100 nm. Head-to-head tr...

This paper studies the properties of single, double and N2R ring network structures during link errors. The structure of the network infrastructure must be redesigned in order to fulfil the requirements of services using the Internet in the future; hence, N2R structures have been suggested. N2R structures are found to be superior regarding network properties compared to the other more tradition...