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Constraints on an annihilation signal from a core of constant dark matter density around the Milky Way center with H.E.S.S.
(American Physical Society, 2015)
An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No ...
A comparison of the mathematical knowledge and skills of first-year student cohorts from a transmission and an outcomes-based curriculum
(Taylor & Francis, 2015)
The traditional transmission-based school curriculum in South Africa has been replaced by an outcomes-based school curriculum since 1998. In this article we report on a comparative study on the mathematical knowledge and ...
Simple forms and invariant subspaces of H-expansive matrices
(Elsevier, 2015)
In this paper we consider a simple form for pairs of matrices (A,H)(A,H), where H is a real symmetric invertible matrix, and A is a real H -expansive matrix, that is, ATHA−HATHA−H is positive semidefinite. For such pairs ...
Reaction of a fluorine atom with methanol: potential energy surface considerations
(American Chemical Society, 2015)
There are several experimental studies of the F + CH3OH reaction but very little in the way of reliable theory. Here reported are aug-cc-pVQZ CCSD(T) computations for two different reaction pathways. The more exothermic ...
Spectral, thermal stability and antibacterial studies of copper, nickel and cobalt complexes of N-methyl-N-phenyl dithiocarbamate
(Taylor & Francis, 2015)
Copper(II), cobalt(II) and nickel(II) bis(N-methyl-N-phenyl dithiocarbamate) complexes having the general
formula [M{S2CN(MePh)}2] (where M = Cu, Co and Ni) have been prepared and characterized
by spectral and thermal ...
Solving Parker’s transport equation with stochastic differential equations on GPUs
(Elsevier, 2015)
The numerical solution of transport equations for energetic charged particles in space is generally very costly in terms of time. Besides the use of multi-core CPUs and computer clusters in order to decrease the computation ...
Estimation of a copula when a covariate affects only marginal distributions
(Wiley, 2015)
This paper is concerned with studying the dependence structure between two random
variables Y1 and Y2 in the presence of a covariate X, which affects both marginal distributions
but not the dependence structure. This is ...
Bis diallyl dithiocarbamate Pt(II) complex: synthesis, characterization, thermal decomposition studies, and experimental and theoretical studies on its crystal structure
(Taylor & Francis, 2015)
Platinum dithiocarbamate (DTC) complex has been synthesized from the ligand diallyl DTC, and its structure was established from elemental analysis, IR, NMR, and single-crystal X-ray analyses to be Pt[S2CN(C3H5)2]2. The ...
A comparison of turbulence-reduced drift coefficients of importance for the modulation of galactic cosmic-ray protons in the supersonic solar wind
(Elsevier, 2015)
The study of the modulation of cosmic rays in the heliosphere relies heavily on a thorough understanding of the transport of these charged particles in the turbulent solar wind. Drift effects due to gradients and the ...
Modelling the effects of scattering parameters on particle-drift in the solar modulation of galactic cosmic rays
(Elsevier, 2015)
It is well known that particle drift motions are suppressed by diffusive scattering as established by direct numerical simulations. The effect of constant scattering on the drift velocities of charged particles has always ...