Table of Content

Design Parameters for the Bottom Plate of a 300kg Capacity Cupola

Furnace.

Apasi Adaokoma,  Zakari Ya’u Ladan  and Musa Dalil.                                  1-12

An Analysis of Solar Radiation Level in Maiduguri Town of Borno

State, Nigeria

E. W. Likta                                                                                                       13-23

Effect of Dynamic Geometry Software on Male and Female student’s Achievement in Geometry in Nasarawa State, Nigeria

Omotosho, Gabriel Akinlolu                                                                            24-36

Influence of Some Physico-Chemical Parameters of Soil on

Heavy Metal Accumulation

Yusuf I.Hassan, S. Abubakar, A.                                                                       37-47

An investigation on the electronic Structure and Magnetic

properties of CrAl Full Heusler Alloy

 J. Sambo M.A .Ahmadu A. Magaji                                                                  48-67

An investigation on the electronic Structure and Magnetic properties of 〖C0〗_2CrAl Full Heusler Alloy

 J.Sambo¹ M.A .Ahmadu² A. Magaji³

^1,2Department of Physics, Gombe State University Tudun Wada, Gombe

³Department of Physics, Hussaini Adamu Federal Polytechnic Kazaure

Email: ¹sambojamaludeen@gmail.com

ASTRACT

An electronic and magnetic properties of Al full heusler alloy was investigated in this paper Using the SPRKKR Greens function we investigated the detailed electronic structure of Cobalt based heusler alloys in  CrAl , of both ordered and disordered state. Density functional theory was used within PBE-GGA Approximation. L21 Ordered Al shows 100% spin polarization within all the approximations, the half metallicity is also observed in YZ disordered state and experimentally obtained values of the magnetic moments are obtained by reducing the symetry. The exchange coupling between Co and Cr causes the variation in structural and magnetic properties. Obtained half metallic properties are mainly because of hybridizations between Co and Cr elements

Keywords: Spin Polarized Relativistic Korringa Kohn Rostoker , Generalized Gradient Approximation, Local Density Approximation, Half Metallicity , Spin Polarization.

INFLUENCE OF SOME PHYSICO-CHEMICAL PARAMETERS OF SOIL ON HEAVY METAL ACCUMULATION

Yusuf I¹.Hassan, S. Abubakar, A.

Department of Chemistry

Umar Suleiman College of Education Gashua.

Emails address: ibrazuby@yahoo.com or ibratimah74@gmail.com.

ABSTRACT

Soil contaminated with heavy metals is poor in nutrients and contribute to sub-optimal plant biomass accumulation. Soil, whether in urban or rural areas, represent a major sink for metals released into the environment from a variety of activities. Some of the metals will persist because of their immobile nature; others will be more mobile migrating to either ground water or plants.  Samples were collected using stratified random sampling method. Each sampling area was divided into ten smaller units and from each unit; ten (10) samples were collected randomly at an average depth of 10-15 cm, the sample were mixed and homogenized. The following metals were analysed Cu, Cr, Cd,Pd, Co,Ni and Zn the result obtained showed that correlation is significant at 5% level.

Effect of Dynamic Geometry Software on Male and Female student’s Achievement in Geometry in Nasarawa State, Nigeria

Omotosho, Gabriel Akinlolu

Mathematics and Statistics Department,

Nasarawa State Polytechnics, Lafia

ABSTRACT

This paper reports on data taken from a gender study of senior secondary school one students in Nasarawa State on learning aspects of geometry using dynamic geometry software. Dynamic geometry software promises direct manipulation of geometrical objects and relations. This paper reports aspects of a research study deigned to examine the impact of using such software on male and female student conceptions. Analysis of the data from the study indicates that, while the use of dynamic geometry software can assist students in making progress towards more mathematical explanation (thereby provide a foundation on which to build further notions of deductive reasoning in mathematics), the ‘dynamic’ nature of the software influences the form and explanation, especially in the early stages. The focus for the analysis is the students’ evolving mathematical explanations as they tackle problems involving the construction of various quadrilaterals. The use of dynamic geometry software can assist students in making progress towards more mathematical explanation (and thereby provide a foundation on which to build further notions of deductive reasoning in mathematics), and the ‘dynamic’ nature of the software influences the form of explanation, especially in the early stages. This underlines the vital role of the teacher in ensuring that the students’ ability to devise explanations moves from reasoning to more general mathematical language.

AN ANALYSIS OF SOLAR RADIATION LEVEL IN MAIDUGURI TOWN OF BORNO STATE, NIGERIA

E. W. Likta

Department of Physics

University of Maiduguri, Maiduguri, Borno State. Nigeria.

E-Mail Address:emmalikta2014@gmail.com

ABSTRACT

In this paper the daily sunshine duration is used to estimate average global solar radiation for Maiduguri, Borno State, Nigeria. The daily sunshine hour were measured for five years from which the monthly mean values were determined. Angstrom model was then used to estimate the global solar radiation based on the monthly mean sunshine hour. The value of solar radiation for Maiduguri town vary from the range of  under the period of this research with the mean value of  .

DESIGN PARAMETERS FOR THE BOTTOM PLATE OF A 300KG CAPACITY CUPOLA FURNACE.

¹Apasi Adaokoma,  ²Zakari Ya’u Ladan  and ³Musa Dalil.

Department of Mechanical Engineering, Federal polytechnic, Kaduna.

Department of Works, Federal Polytechnic, Kaduna.

email:

ABSTRACT

The modification of microstructures to achieve desired properties is a fundamental approach in metallic materials development. Heat-treatment which is one of the primary routes of developing microstructures requires the use of well designed furnaces to be able to attain desired temperatures and a good designed furnace such as cupola must have bottom plate strong enough to withstand the heavy mass. Heat-treatment furnaces with effective temperature sensing, heat retaining capacity and controlled environment are necessary for heat-treatment operations to be successfully performed. Some of the parts of furnace considered during design is the bottom plate. This paper have discussed the design parameters for a furnace bottom plate. The plate was used when operating a design and fabricated cupola furnace, tested and the result shows that the design analysis can be adopted.