School of Physical Sciences (SPS): Recent submissions

Now showing items 41-60 of 917

MEASUREMENT OF NATURAL RADIOACTIVITY OF SOILS FROM SELECTED CITIES IN OYO STATE, SOUTHWESTERN NIGERIA

IBIKUNLE, SUNDAY BABATUNDE (Federal University of Technology Akure, 2007-03-26)

The concentrations of some of the natural radionuclides in the uranium, actinium and thorium series and of 40K in soil samples collected from 9 major towns of Oyo State, Southwestern Nigeria have been determined by ...
MICROWAVE INTERFERENCE DUE TO RAIN SCATTER AT Ku AND Ka - BANDS IN AKURE, SOUTH WEST, NIGERIA

ALAO, OLUMUYIW A ADEMOLA (Federal University of Technology Akure, 2010-12-22)

The strong impact of rain on satellite-based telecommunication systems makes the prediction of rain induced propagation impairments (such as attenuation and interference) using the cumulative distribution of the point ...
MILLILITRE RADIOWAVE SCATTERING BY TROPICAL RAIN TYPES

ADEKOLA, ADEREMI SIKIRU (Federal University of Technology Akure, 2002-03-26)

This study presents the results of calculations of propagation impairments to millimetre wave signals by spherical raindrops in different types of tropical rainfall. The Mie scattering theory, for spherical raindrops, has ...
MICROWAVES ABSORPTION BY OXYGEN AND WATER VAPOUR AT . TROPICAL LATITUDES

ADENUGBA, DAVID (Federal University of Technology Akure, 1998-10)

The total atmospheric absorption due to oxygen and water vapour in the frequency range, 1O-350GHz was evaluated employing Liebe's empirical model. The basic data include monthly mean meteorological parameters of pressure, ...
PILOT STUDY OF NATURAL RADIOACTIVITV IN VEGETABLES IN SE,LECTEDLOCATIONS IN ONDO STATE, NIGERIA.

EYEBIOKIN, MOJISOLA RACHAEL (Federal University of Technology Akure, 2005-11-04)

The activity concentrations of 40K, 238U and 232Th in some vegetables commonly consumed in Jegele, Idanre and Agbabu have been measured using the gamma ray spectrometer consisting of a lead shielded 76mm by 76mm Nal (Tl) ...
PRECISION THERMOMETRIC SYSTEM USING RADIO TELEMETRY WITH COMPUTER INTERFACING

ODO, EKUNDARE AYODELE (Federal University of Technology Akure, 2002-05-06)

A precise temperature monitoring system in the range 50-1350uC using Radio Telemetry as a means of signal transmission has been designed and constructed. It consists of a sensitive thermocouple amplifier with active cold ...
RAIN DEPOLARIZATION OF LINEARLY POLARIZED CENTIMETRIC WAVES ON TERRESTRIAL AND SLANT PATHS IN NIGERIA

AFOLAYAN, B.OLUGBENGA (2024-05-22)

This work presents an investigation of the amount of signal depolarisation experienced by terrestrial and earth-space communication systems during the passage of linearly polarized (horizontal and vertical) radio waves ...
SEASONAL AND DIURNAL VARIATIONS OF SURFACE RADIO REFRACTIVITY IN AKURE, SOUTH-WESTERN NIGERIA

RAIMI, ADEYI ADEYEMI (1992-08-19)

The surface meteorological data recorded at Akure (lat. 07° 17' N, long. 05° 14'E), in South-Western Nigeria are used to study the seasonal and diurnal variations of surface radio refractivity, Ns in this 'geographic ...
SIMULATION OF THE PERFORMANCE AND OPTIMAL SIZE OF PHOTOVOLTAIC SYSTEM USING HELIOPHYSICAL VARIABLES

BOLAJI, OLAWASEGUN (Federal University of Technology Akure, 2007-09-10)

A method of simulating the performance and optimal size of photovoltaic (PV) systems based on the observed time series of some heliophysical variables was developed and explored in this research. The data used were the ...
SIMULATION OF THE STRUCTURE FACTOR OF LIQUID METALS

ADEKOYA, ADEBAYO ADEYEMI (Federal University of Technology Akure, 2008-03-31)

Applying the solution of the Percus- Yevick equation to a one component system and using a screened pseudopotential, a model is developed for simulating the structure factor of liquid metals at different temperatures and ...
SOLAR RADIATION MODELS FOR SOLAR ENERGY APPLICATIONS IN NIGERIA

FALAYI, ELIJAH OLUKAYODE (Federal University of Technology Akure, 2005-10-25)

A model for the prediction of average monthly global solar radiation on horizontal surface for some locations in the tropical climate zone is presented. Global solar radiation and sunshine duration data for five Nigeria ...
TERRAIN AND CLIMATOLOGICAL EFFECTS ON MICROWAVE SIGNALS: A CASE STUDY OF NTA AKURE, MICROWAVE LINK BETWEEN OBA-ILE AND IJU.

OJO, OLADOTUN AYOTUNDE (Federal University of Technology Akure, 2003-09)

This study presents the results of the path profile analysis of a microwave link hetween stations on the surface of the earth transmitting at a frequency of 7.7760Hz using the Nigerian Television Authority (NTA) transmitters ...
CHAOTIC DYNAMICS OF THE DRIVEN DAMPED PENDULUM

IWETAN, CAROLINE NIHINLOLAMIWA (Federal University of Technology Akure, 2007-01)

The study of non-linear dynamical systems has brought to the realization of scientists from all disciplines the power and beauty of geometrical and qualitative techniques. These techniques could be applied to a number ...
A COMPARATIVE STUDY OF PAPER HOLD DOWN SYSTEMS FOR X-V PLOTTING INSTRUMENTS

NWOSU, Edwin Ugochukwu (2010-10-08)

A comparative study of 'the vacuum hold-down system and the electrostatic hold-down system for X-Y plotter was carried out using fabricated prototype units. The vacuum hold-down system consists of a motor driven suction ...
characterization of stability conditions in the atmospheric surface layer of Obafemi Awolowo University, Ile-Ife, Nigeria

Ayoola, Awotuse (Federal University of Technology Akure, 2011-02-02)

Micrometeorological from the Nigerian Micrometeorological Experiment (NIMEX) conducted between 24th February and 10th March 2004, at a tropical agricultural field site in Ile-Ife (7.550N, 4560E), south-western Nigeria has ...
STUDIES OF THE FLOW CHARACTERISTICS OF A SHARP-EDGED CIRCULAR ORIFICE

EWETUMO, THEOPHILUS (Federal University of Technology Akure, 2001)

An equipment was designed and constructed to study the flow characteristics of a fluid through a sharp-edged circular orifice. These characteristics include the coefficients of discharge for different values of Reynolds ...
THE EFFECT OF SCREENING ON THE THER1\1AL RESISTIVITY OF METALS

ADESAKIN, GBENGA ELIJAH (Federal University of Technology Akure, 2008-01-13)

A model for calculating electron-electron interaction, compressibility ratio, screening parameter and thermal resistivity of metals was proposed by using an interaction potential. A FOTRAN 90 computer programme was ...
THEORETICAL STUDY OF RAIN INDUCED PROPAGATION EFFECTS ON SATELLITE TELECOMMUNICATION IN SOME TROPICAL LOCATIONS

OMOTOSHO, TEMIDAYO VICTOR (FederalL University Of Technology, Akure, Nigeria, 2004-01-04)
A MODEL PSEUDOPOTENTIAL TECHNIQUE FOR CALCULATING SOME PHYSICAL PROPERTIES OF METALS

UKPONG, ANIEKAN MAGNUS (2002-10)

A Wigner-Seitz cell dependent 'relaxed core' model pseudopotential is developed from first principles consideration of the stationary state perturbation theory and the free electron gas approximation. The Fourier transform ...
A COMPARATIVE STUDY OF PAPER HOLD DOWN SYSTEMS FOR X-V PLOTT~NGINSTRUMENTS

NWOSU, Edwin Ugochukwu (2010-10-08)

A comparative study of 'the vacuum hold-down system and the electrostatic hold-down system for X-Y plotter was carried out using fabricated prototype units. The vacuum hold-down system consists of a motor driven suction ...

Now showing items 41-60 of 917

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