A new Schiff base has been synthesized from 3-(3-nitrophenyl)-1-phenyl-1H-pyrazole-4carbaldehyde and O-amino phenol. Metal complexes of the Schiff base have been synthesized from acetate salt of Cu (II), Co (II) and Ni (II) metal in the alcoholic medium. The newly prepared Schiff base ligand and metal complexes have been characterized by various physicochemical techniques such as Elemental anal...

We propose a simple fast spectral method for the Boltzmann collision operator with general collision kernels. In contrast to the direct spectral method [17, 27] which requires O(N) memory to store precomputed weights and has O(N) numerical complexity, the new method has complexity O(MN logN), where N is the number of discretization points in each of the three velocity dimensions and M is the to...

MIT Abstract. In this paper, we introduce a variant of spectral sparsification, called proba-bilistic (ε, δ)-spectral sparsification. Roughly speaking, it preserves the cut value of any cut (S, S c) with an 1 ± ε multiplicative error and a δ |S| additive error. We show how to produce a probabilistic (ε, δ)-spectral sparsifier with O(n log n/ε 2) edges in time˜O(n/ε 2 δ) time for unweighted undi...

We describe the synthesis and characterization of cobalt(II) and nickel(II) coordination compounds of 4[N-(furan-2'-aldimine)amino]antipyrine thiosemicarbazone (FFAAPTS) and 4[N-(4'-nitrobenzalidene) amino]antipyrine thiosemicarbazone (4'-NO(2)BAAPTS). All the isolated compounds have the general composition MX(2)(L)(H(2)O) (M = Co(2+) or Ni(2+); X = Cl, Br, NO(3), NCS or CH(3)COO; L = FFAAPTS o...

The northwestern part of the Kerman Cenozoic magmatic arc (KCMA) contains many areas with porphyry copper mineralization. In this research, we used the advanced space-borne thermal emission and reflection radiometer (ASTER) and Enhanced Thematic Mapper plus (ETM+) images of this region to map the distribution of hydrothermally altered rocks, based on their mineral assemblages. The spectral meas...

6 Friedrichs, K. O., Mathematical Aspects of the Quantum Theory of Fields (New York: Interscience, 1953). 7Friedrichs, K. O., Lectures, Summer Conference on Mathematics and Modern Physical Theories, Boulder (1960). 8 Schwartz, J., Mass Renormalization and Spectral Shifts, N.Y.U. Research Report (1960). 9 Friedrichs, K. O., "Spectral theory of operators in Hilbert space," N.Y.U. lecture notes (1...

We tested two hypotheses to determine whether dorsal cochlear nucleus (DCN) neurons are specialized to derive directionality from spectral notches: DCN neurons exhibit greater spectral-dependent directionality than ventral cochlear nucleus (VCN) neurons, and spectral-dependent directionality depends on response minima (nulls) produced by coincidence of best frequency (BF) and spectral-notch cen...

The behaviour o f monomers and trimers o f C-phycocyanin and allophycocyanin under high pressure is studied by UV-VIS absorption spectroscopy. It is found that fast variations o f pres­ sure (Ap > 500 bar) and/or temperature are accompanied by significant changes in the absorp­ tion spectra (intensity and/or spectral shift). The induced differences disappear, however, in part, when the samples ...

the lithologies of regions, which located near the collision zone, are very different from other geology setting. mapping in these areas needs extensive and exact studies and tools because of the variety of rocks, intensive tectonic uplift and complicated units. hyperspectral sensor is one of the most advanced tools with hundreds of bands that each measures a very narrow range of wavelengths an...