The article describes and analyses the conflicts over land, authority and natural resources among the non-governmental organisations (NGOs) and the ethnic groups in West Caprivi in Namibia. It also offers information on the tribalism, tradition and ethnicity in South Africa,… Read morePost-Apartheid ‘Tribalism’? Land, Ethnicity and Discourses on San Subversion in West Caprivi, Namibia.
Unlike normal chemical bonds, hydrogen bonds (H-bonds) characteristically feature binding energies and contact distances that do not simply depend on the donor (D) and acceptor (:A) nature. Instead, their chemical context can lead to large variations even for a same… Read morePredicting Hydrogen-Bond Strengths from Acid?Base Molecular Properties. The pKa Slide Rule: Toward the Solution of a Long-Lasting Problem
The purpose of this study was to examine the suitability of polystyrene-coated (PS-coated) microcapsules of drug-resin complex for achieving prolonged release of diltiazem-HCl, a highly water-soluble drug, in simulated gastric; intestinal fluid. The drug was bound to Indion 254, a… Read morePreparation; in vitro evaluation of polystyrene-coated diltiazem-resin complex by oil-in-water emulsion solvent evaporation method
The transformation of Al3Zr (L12) and Al3(Zr1?xTix) (L12) precipitates to their respective equilibrium D023 structures is investigated in conventionally solidified Al–0.1Zr and Al–0.1Zr–0.1Ti (at.%) alloys aged isothermally at 500 °C or aged isochronally in the range 300–600 °C. Titanium additions… Read morePrecipitation evolution in Al–Zr and Al–Zr–Ti alloys during aging at 450–600 °C
The fabrication of C/Si–B–C–N fiber–reinforced ceramic matrix composites (FRCs) is reported. The processing basically involves three individual steps: (i) vacuum-assisted infiltration of a liquid two-component Si–B–C–N precursor into stacked woven carbon fiber fabrics, (ii) stepwise thermal cross-linking and (iii) thermal… Read moreProcessing and properties of C/Si–B–C–N fiber–reinforced ceramic matrix composites prepared by precursor impregnation and pyrolysis
Analytical transmission electron microscopy was used to characterize precipitation processes in a model Al–4.0Cu–0.3Mg (wt.%) alloy aged at 200 °C. The evolution of microstructure was more complex than previously reported and involved processes common both to the binary Al–Cu and… Read morePrecipitation reactions in Al–4.0Cu–0.3Mg (wt.%) alloy
The Ghadames Basin contains important oil- and gas-producing reservoirs distributed across Algeria, Tunisia, and Libya. Regional two-dimensional (2-D) modeling, using data from more than 30 wells, has been undertaken to assess the timing and distribution of hydrocarbon generation in the… Read morePetroleum generation and migration in the Ghadames Basin, north Africa: A two-dimensional basin-modeling study
In addition to seismically mapped fault structures, a large number of faults below the limit of seismic resolution contribute to subsurface deformation. However, a correlation between large- and small-scale faults is difficult because of their strong variation in orientation. A… Read morePrediction of subseismic faults and fractures: Integration of three-dimensional seismic data, three-dimensional retrodeformation, and well data on an example of deformation around an inverted fault