Results 301 to 310 of about 280,948 (347)
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Critical Arts. A Journal for Cultural Studies, 2018
This article attempts to theorise the various representations of Zimbabwe in the media. It does so by scanning the media landscape for significant events constituting what is commonly called the “Zimbabwean crisis”. Such representations centre around the
N. Mhiripiri, Oswelled Ureke
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This article attempts to theorise the various representations of Zimbabwe in the media. It does so by scanning the media landscape for significant events constituting what is commonly called the “Zimbabwean crisis”. Such representations centre around the
N. Mhiripiri, Oswelled Ureke
semanticscholar +1 more source
Cirugía Española (English Edition), 2011
Geographical barriers are a determining factor in the accessibility of Hospital health care, and structural changes to improve geographic accessibility must be introduced. The purpose of this study is to compare accessibility costs and the level of satisfaction obtained in an adapted Specialist Centre with a peripheral MAS (Major Ambulatory Surgery ...
Ricardo de Miguel, Ibáñez +6 more
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Geographical barriers are a determining factor in the accessibility of Hospital health care, and structural changes to improve geographic accessibility must be introduced. The purpose of this study is to compare accessibility costs and the level of satisfaction obtained in an adapted Specialist Centre with a peripheral MAS (Major Ambulatory Surgery ...
Ricardo de Miguel, Ibáñez +6 more
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Journal of Molecular Catalysis A: Chemical, 2001
Abstract Theoretical studies on ethene metathesis reaction proceeding on molybdenamethylidene centres of molybdena-alumina catalyst are reported. Calculations were carried out with the Gaussian 94 program, using density functional theory. Models of active sites containing MoVI and MoIV (both singlet and triplet state) have been developed.
Jarosław Handzlik, Jan Ogonowski
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Abstract Theoretical studies on ethene metathesis reaction proceeding on molybdenamethylidene centres of molybdena-alumina catalyst are reported. Calculations were carried out with the Gaussian 94 program, using density functional theory. Models of active sites containing MoVI and MoIV (both singlet and triplet state) have been developed.
Jarosław Handzlik, Jan Ogonowski
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Journal of Physics and Chemistry of Solids, 2015
Abstract The dependence of the EPR g-factors on the local structural parameter for a 4f11 configuration ion Er3+ in a trigonal crystal-field has been studied by diagonalizing the 364×364 complete energy matrices. Our studies indicate that the EPR spectra of the trigonal Er3+–VK centers in KMgF3 and KZnF3 may be attributed to the translation of the ...
Rui-Peng Chai +3 more
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Abstract The dependence of the EPR g-factors on the local structural parameter for a 4f11 configuration ion Er3+ in a trigonal crystal-field has been studied by diagonalizing the 364×364 complete energy matrices. Our studies indicate that the EPR spectra of the trigonal Er3+–VK centers in KMgF3 and KZnF3 may be attributed to the translation of the ...
Rui-Peng Chai +3 more
openaire +1 more source
The European Physical Journal D, 2014
Local structure and electron paramagnetic resonance (EPR) parameters (the g factors, g i , and the hyperfine structure constants A i , i = x, y, z) for the impurity Cu2+ centres in a (CH3)2NH2Al(SO4)2·6H2O (DMAAS) crystal are theoretically investigated ...
Hua-Ming Zhang, Wen-Bo Xiao, Xiong Wan
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Local structure and electron paramagnetic resonance (EPR) parameters (the g factors, g i , and the hyperfine structure constants A i , i = x, y, z) for the impurity Cu2+ centres in a (CH3)2NH2Al(SO4)2·6H2O (DMAAS) crystal are theoretically investigated ...
Hua-Ming Zhang, Wen-Bo Xiao, Xiong Wan
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Optics Communications, 1999
Abstract Temperature dependencies of the total effective trap density N eff were studied theoretically for two-centre and three-charge-state photorefractive crystals. The results show that N eff usually decreases with increasing temperature in three-charge-state crystals, while it shows more complicated behaviour in two-centre crystals.
Mingjun Chi, S.X Dou, Peixian Ye
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Abstract Temperature dependencies of the total effective trap density N eff were studied theoretically for two-centre and three-charge-state photorefractive crystals. The results show that N eff usually decreases with increasing temperature in three-charge-state crystals, while it shows more complicated behaviour in two-centre crystals.
Mingjun Chi, S.X Dou, Peixian Ye
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Theoretical studies and structural analysis of models of surface organometallic centres [PDF]
, 2000 Theoretical calculations utilizing the density functional theory (DFT) method are presented here from the point of view of their applicability in modelling catalytic rhodium gem dicarbonyl, Rh(CO)2, species on silica surface. The surface rhodium gem dicarbonyls were modelled by [Rh(CO)2(OSiH3)], [Rh(CO)2(OHSiH3)]+, [Rh(CO)2(ClSiH3)]+, [Rh(CO)2(Cl ...
openaire
Journal of Physics B: Atomic, Molecular and Optical Physics, 1994
State-to-state rotational transitions of planar structures forming regular polygons are studied within a simple spectator model, which for electron-diatomic molecule scattering has been found to be in excellent agreement with experiments. Selection rules in the state-to-state transition probabilities for the excitation from the ground state are ...
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State-to-state rotational transitions of planar structures forming regular polygons are studied within a simple spectator model, which for electron-diatomic molecule scattering has been found to be in excellent agreement with experiments. Selection rules in the state-to-state transition probabilities for the excitation from the ground state are ...
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IETE Journal of Research, 1975
Theoretical study of the centre fed non-planar diode antenna with transversely displaced feed points in plasma medium is presented. Mathematical expressions for the radiation patterns are developed and calculations are made to predict the effect of feed points displacement on the radiation patterns of the centre fed half-wave and full-wave non-planar ...
Prem Swarup Bhatnagar, P. K. Chaturvedi
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Theoretical study of the centre fed non-planar diode antenna with transversely displaced feed points in plasma medium is presented. Mathematical expressions for the radiation patterns are developed and calculations are made to predict the effect of feed points displacement on the radiation patterns of the centre fed half-wave and full-wave non-planar ...
Prem Swarup Bhatnagar, P. K. Chaturvedi
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Molecular Physics, 2008
A theoretical method for investigating the inter-relation between the EPR parameters and local structure has been established on the basis of the complete energy matrices for 3d3 configuration ions in both the trigonal and tetragonal ligand fields. By means of this method, the local structure of the octahedral Cr3+ centres in double molybdates series ...
Rui-Peng Chai +4 more
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A theoretical method for investigating the inter-relation between the EPR parameters and local structure has been established on the basis of the complete energy matrices for 3d3 configuration ions in both the trigonal and tetragonal ligand fields. By means of this method, the local structure of the octahedral Cr3+ centres in double molybdates series ...
Rui-Peng Chai +4 more
openaire +1 more source