Active Wheatstone Bridge — A solution of tight speed dc motor control,

K. M. Yanev; A. I. Litchev and P. Van Otten 

1

Abstract

Possible effects of botswana's telephone number change on design of telephone call charging systems,

J.S.J. Daka, D.D. Mbewe, I. Zibani

9

Abstract

Passive solar energy-efficient architectural building Design technique using archipak (n. Cyprus)

K. Rabah and Z. Tamakan

15

Abstract

Coffee husks: - A possible wood substitute in the particleboard industry,

W.O.Ogola, J.V.Tesha^*.and E.T.N.Bisanda

26

Abstract

A study of the environmental aerosol deposition on the plant leaves in Gaborone, Botswana,

T. S. Verma^*, J. Prakash^**, T. A.Thomas

34

Abstract

Secondary wastewater treatment by microalgae isolated from Gaborone oxidation ponds,

D. D Shushu and P. Chipeta

39

Abstract

A proposed flat roof variant for the low technology tropical environment.,

A. N. Aniekwu

44

Abstract

Unsteady free convection and mass transfer flow of a non-newtonian fluid with thermal diffusion effect,

A Ogulu; K D Alagoa and D D S Bawo

52

Abstract

Investigation of regional trends and seasonal shifts in the river flow regimes of Southern Africa,

B.F. Alemaw and T.R.Chaoka

57

Abstract