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  • 1995-1999  (2)
  • 1
    ISSN: 1432-0495
    Keywords: Key words Soil samples ; Jordan ; Metal ions ; Multivariate analysis ; Principle component ; Dendogram
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  A Multivariate analysis and principal component analysis was performed on 37 samples gathered from different regions in north Jordan. Twenty-eight descriptors (variables) for each sample were used in these calculations, among them were metal ion concentration, such as Pb, Cr, Co, Zn, Ca, Mg, Fe, Na, K, Al, Cu, Ni, Ti, Si and Mn. Other descriptors were pH, electrical conductivity (EC), and grain sizes. It was found that the samples form three clusters, namely, agriculture, industrial and waste treatment plane regions. Statistical analysis showed that the samples are classified into seven classes, with the majority of the samples classified into three clusters. The first three principal components explained 99.2% of the variance. This method offers a method to classify geographical regions on a pollution bases and to determine the possible sources of pollution for such regions. This study showed that some of the agricultural farms were remote from the pollution sources clusters with polluted regions such as industrial or waste treatment complexes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 33 (1998), S. 4207-4212 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The plasma-spraying technique is used in this study. Two types of ceramic coating (Al2O3–13 wt% TiO2 and Cr2O3–5 wt% SiO2–3 wt% TiO2) with and without NiAl bonding coating are subjected to bonding strength and wear tests. Determining the most suitable coating and coating technique and solving an industrial problem are the main objectives of this study. © 1998 Kluwer Academic Publishers
    Type of Medium: Electronic Resource
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