AIMS AND SCOPE
International journal of engineering and technical mathematics is published Bi-annually by Development Universal Consortia. It seeks to expand knowledge in Engineering, Mathematics, Science, Architectural, Industrial, Technological and Environmental Issues, and provide information on these and other related issues. The journal is a referred publication which fosters the exchange of information and new ideas among, Engineers, Mathematicians, Scientists, Technologist, Environmentalists, Architects, Industrialists, Development Planners, Public Policy Makers, Professionals and Academics, Students, Staff Members of Research Institutions and International Agencies. The views expressed in this journal are entirely those of the authors. The publishers, editors and agents of Development Universal Consortia accept no responsibility for any error or misstatement contained herein or for consequences that may ensue from the use of information contained in this publication. Manuscripts to this journal are welcome. They should be written in English or any otherhere strictly to the

editorial guidelines. They may also be drawn from theory and practice, but may be edited for reasons of space and clarity.

 

 

 

EDITORIAL BOARD 

EDITORS

ADEKUNLE IFESANYA, Ph.D

Bauhaus University,
Weimar, Germany.

JAMES AKPABIO, M.Sc.

Development Universal Consortia
Ikot Ekpene, Nigeria.

 

CONSULTING EDITORS


PROF. H. FRIEDRICH-NEL
Central University of Tech.
Free State, South Africa.

UFOT A. PHENSON, Ph.D
Ritman University.
Ikot Ekpene, Nigeria.

 

CONTENTS

Predictive Effect Of Four Psychologicical Variables On Pre-service Teachers Achievement in Mathematics. 
Akinsola, M. K.
Olumuyiwa, S. A.
Oladele, A. O.


Fundamental Group Of Two Dimension Manifold 
Chinaka, A. I.
Achugamonu, P. C.
Onuoha, Desmond O.


Theoretical Modelling Of Modal Behaviour in Vertical Cavity Surface Emitting Lasers
Sumaila, Y. A.