Metals used in everyday life are produced from ores occurring in the Earth’s crust. Geological processes are known to concentrate minerals to form ores of economic value. Mineral processing engineers concentrate these ores by mechanical and physico-chemical methods while the extractive metallurgist extracts the metals by chemical means.

The structures of three xGeO(2)-(1- x)P(2)O(5) glasses, where x = 0.98,0.88, and 0.81, have been studied by neutron and x-ray diffraction experiments that yield well resolved P-O and Ge-O bond distances. The Ge-O coordination number (N(GeO)) increased from 4.0 ± 0.2 to 4.5 ± 0.2 with the decrease in x from 0.98 to 0.81. The increase in N(GeO) is consistent with a structural model that assumes t...

Suicide bombing is a very complex phenomenon. It has been a focus of research in recent times. However inherent biases of researchers muddle the picture: researchers from western countries focus the issue around political liberty and notion of democracy, while those from Islamic countries tend to take the afterlife-reward notion as an incentive for suicide bombing. However in order to understan...

One of the problems confronting the Nigerian nation is unemployment and regional imbalance in employment has now become a pressing national issue. The aim of this study is to find out whether or not the current pattern of employment in the federal civil Service reflects the six geopolitical zones of Nigeria. Secondary data on the number of persons employed in the Federal Civil Service from 2008...

In this paper a real example of a globally distributed collaborative design project is analyzed. Some of the problems identified as a result of this analysis include: 1the lack of a complete design environment prior to the modeling stage, and 2the need for a flexible and intuitive collaborative environment. To address these problems we propose some preliminary research results of task ontology,...

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identifying the change trends in forms of land surface is one of the main topics in geomorphic system. in this view, we try to assess the stability level of geo systems, boundary changes, instability and prediction of surface forms and processes response. this paper tries to conduct a comparative analysis on the geomorphic equilibrium paradigms, critical thresholds, environmental and natural ha...