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Home  >  Volume 46 (May, 2018)

47. INVESTIGATION OF ROAD FAILURES USING VERTICAL ELECTRICAL SOUNDING METHOD FOR A TYPICAL COMPLEX BASEMENT: A CASE STUDY OF ADEYEMI COLLEGE OF EDUCATION, ONDO, NIGERIA. by Ijila Pauline O., Kolebaje Olusola T., Ojo Akintayo O., and Akinyemi P. Volume 46
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HYBRIDIZATION EFFECT ON THE GROUND STATE OF THE KONDO MODEL FOR TWO KONDO REGIMES UNDER THE APPLICATION OF MAGNETIC FIELD

Okunzuwa I.S. and Azi O.J.

Department of Physics, University of Benin, Benin City, Nigeria.

Department of Physics, Federal University of Petroleum Resources Effurun, Nigeria.

Abstract

In recent years, the Kondo Lattice Model (KLM) has attracted a lot of interest from both the experimental and theoretical points of view. In an effort to gain better understanding and clarify the behaviour of the ground state of this model, the antiferromagnetic and ferromagnetic regimes of the exchange coupling, J, under hybridization effect was considered under the application of the magnetic field, H. For the aniferromagnetic regime (J >0) the ground state was found to be greater than zero while that of the ferromagnetic regime (J<0) was found to be less than zero.

Keywords: Paramagnetism, Ferromagnetism, Ground State energy.

INVESTIGATION OF ROAD FAILURES USING VERTICAL ELECTRICAL SOUNDING METHOD FOR A TYPICAL COMPLEX BASEMENT: A CASE STUDY OF ADEYEMI COLLEGE OF EDUCATION, ONDO, NIGERIA.
Ijila Pauline O.1, Kolebaje Olusola T., Ojo Akintayo O., and Akinyemi P.
Department of Physics, Adeyemi College of Education, Ondo State, Nigeria.
Department of Science Laboratory Technology, D.S. Adegbenro ICT Polytechnic, Itori-Ewekoro, Ogun State.
Abstract
In this study, investigation of road failures on three roads within Adeyemi College of Education, Ondo State, southwestern Nigeria was carried out using Vertical Electrical Sounding (VES) method. Omega resistivity meter was used to acquire the apparent resistivity data, and a total of ten VES points were created with 50 m station intervals on each road, and 100 m spread for half-current electrode spacing. The data were subjected to a computer based iterative technique using IPI2WIN software (version 3.0) to generate sounding curves and geoelectric pseudo-sections. The results revealed varying degree of resistivity values with stable portions of the road having higher resistivity values compared with the unstable portions. The low resistivity values of the unstable zones were mainly due to the presence of massive clay contents in the subsurface as indicated in VESs 2, 3, 5, 7, 8, and 9. The stable portions VESs 1, 4, 6 and 10 revealed higher resistivity values in the subsurface. The linear fractures which indicated clay, sandy clay or lateritic clay enriched regions, and water bearing zones with characteristics of low resistivity value of less than 300 Ωm were observed on the unstable portions of the roads. Generally, the massive presence of clayey material in the subsurface of the roads was the major cause of failure along the roads.
Keywords: Road Failure, VES, Resistivity, Clay 
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