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   Functionally graded metal matrix composite by centrifugal casting technique mathematical correlation

   Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Williams S. Ebhota --- Discipline of Mechanical Engineering, South Africa Freddie L. Inambao --- Discipline of Mechanical Engineering, South Africa

   The functionally graded materials (FGMs) solidification process has complicated movement phenomena of fluid, solute and heat. These phenomena control the segregation of particles in a molten matrix, interactions of particles with a solidification front and the integration of particles in...

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2. 

   Double-brooding in Southern Yellow-billed Hornbills Tockus leucomelas

   Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mark Stanback --- , United States David Millican --- , United States William Versfeld --- , Namibia Matti Nghikembua --- , Namibia Laurie Marker --- , Namibia John Mendelsohn --- , Namibia

   Double-brooding is an avian breeding strategy where birds produce at least two successful nests in a single season. Double-brooding is seen most frequently in small passerines for which the breeding season is lengthy enough that they can easily fit in...

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