Physics: Recent submissions

Now showing items 141-160 of 182

INFLUENCE OF NANOCELLULOSE CONCENTRATION ON OPTOELECTRONIC PROPERTIES OF ELECTROPLATED CADMIUM TELLURIDE THIN FILMS

AKINBOYEWA, OLAKUNLE LAWRENCE (Federal University Of Technology, Akure., 2020-02)

Cadmium telluride (CdTe) doped nanocellulose thin films were successfully deposited on glass/fluorine doped tin-oxide (FTO) substrates from an aqueous electrolyte bath containing hydrated Cadmium sulphate (CdTe.8H2O) and ...
TROPOSPHERIC INFLUENCE ON DIGITAL TERRESTRIAL TELEVISION (DTTV) AND PATH LOSS MODELING OVER NIGERIA

AKINBOLATI, AKINSANMI (Federal University Of Technology, Akure., 2021-02)

This study investigates the influence of some tropospheric parameters; such as temperature, atmospheric pressure, relative humidity, elevation pattern and surface radio refractivity on the Received Signal Strength (RSS) ...
DEVELOPMENT OF SOIL INFILTRATION MEASURING DEVICE

UMUKORO, EDAFEWHUOTU (Fed University of Technology Akure, 2019-07)

The development of soil infiltration device is designed to measure the amount of water entering into the soil. The instrument comprises of six units namely the percolation material, pond unit, sensor unit, control unit, ...
SPATIAL AND TEMPORAL DISTRIBUTION OF MODIFIED RADIO REFRACTIVITY GRADIENT AT DIFFERENT PRESSURE LEVELS OVER NIGERIA

OVIANGBEDE, VICTOR OYAKHIRE (Fed University of Technology Akure, 2019-12)

The meteorological effects on radio wave signals propagating through the troposphere are of great concerns in the design and performance of radio communication systems. These effects which lead to anomalous propagation ...
EFFECT OF SCREENING ON POSITRON ANNIHILATION CHARACTERISTICS IN METALS

OSIELE, ONYEKACHUKWU MIKE (Fed University of Technology Akure, 2001-08)

A screening parameter was introduced into the enhancement factor used to calculate positron annihilation rates based on the perturbed hypernetted chain approximation model. The consequential effects of electron-positron ...
EFFECTS OF ANNEALING ON THE KINEMATICS OF NATURAL AND SYNTHETIC BARITE

ONUEGBU, SANTUS CHINONSO (Fed University of Technology Akure, 2018-04)

The increasing demand of natural barite over the synthetic barite for use in the industries has become a source of debate among researchers. Many research works have been set up to determine more fully the comparative ...
THEORETICAL STUDY OF RAIN INDUCED PROPAGATION EFFECTS ON SATELLITE TELECOMMUNICATION IN SOME TROPICAL LOCATIONS

OMOTOSHO, TEMIDAYO VICTOR (Fed University of Technology Akure, 2003-12)

The study investigates the scattering effect of oblate spheroidal raindrops on Earth-space wave communication in the frequency band 1-52 GHz in three tropical locations lle-Ife, Nigeria (4.34~, 7.33'N>" Douala, Cameroon ...
FIRST TO FOURTH ORDER ANGSTROM-PRESCOTT-TYPE MODELS AND THE PREDICTION OF GLOBAL SOLAR IRRADIANCE OVER NIGERIA

OLONIYO, OLUMUYIWA AYOTUNDE (Fed University of Technology Akure, 2019-04)

Daily re-analyzed data of global solar radiation and sunshine hour for ten years 2004-2013 were obtained from Era-Interim dataset at European Centre for Medium-Range Weather Forecast (ECMWF) based at Shinfield Park, ...
RADIATION MAPPING OF OYO STATE, SOUTHWESTERN NIGERIA

OLATUNJI, ADEMOLA SUNDAY (Fed University of Technology Akure, 2016-05)

Exposure of human beings to radiation cannot be measured or quantified by human senses. These radiations differ in their hardness and ability to penetrate materials. The implications of radiation on human body include ...
DEPENDENCE OF VARIABILITY OF GEOMAGNETIC HORIZONTAL FIELD ON EQUATORIAL RING CURRENT.

OLAJIDE, OWOYOMI FEMI (Fed University of Technology Akure, 2019-11)

The study of the dependence of variability of geomagnetic horizontal field on equatorial ring current has been carried out using 14 African observatories. This study examined the diurnal, monthly and seasonal variations ...
EVALUATION OF PRECIPITABLE WATER VAPOUR OVER SOME STATIONS IN NIGERIA USING ERA-INTERIM AND SURFACE DATA

OLADUMIYE, SAMUEL OLUWATOBI (Fed University of Technology Akure, 2019-05)

In this research work, precipitable water vapour was investigated using air temperature and relative humidity data for the years 2000 to 2005 retrieved from ERA-interim. Eight selected weather stations which were grouped ...
DISTRIBUTION OFRAINF ALL RATES OF SHORT INTEGRA TION TIME AND THEIR APPLICATIONS TO MICROWAVE PROPAGATION OVER NIGERIA

OJO, JOSEPH SUNDAY (Fed University of Technology Akure, 2009-06)

In this study, measurement of long-term point and line rainfall rates carried out over a period of 30 years (1975 to 2004) in some locations in Nigeria, namely: Calabar, lkeja. Akure, Minna and Kano (representing different ...
EVALUATIONOF SPECIFIC HUMIDITY OVER NIGERIA USING ARTIFICIAL NEURAL NETWORK

OGIDAN, IDOWU RAPHAEL (Fed University of Technology Akure, 2015-09)

In this research, neural network–based autoregressive moving average with exogenous inputs (NNARMAX) and autoregressive moving average with exogenous inputs (ARMAX) models were used to analyse specific humidity (q) data ...
ASSESSMENT OF ENTRANCE SKIN DOSE FOR PATIENTS AND STAFF EXPOSURE DURING X-RAY RADIOGRAPHY

OFIWE, COLLINS UCHE (Fed University of Technology Akure, 2017-05)

In this study, the entrance skin dose (ESD) for patients and staff exposure during X-ray examinations were determined at the General Hospital, Alade-Idanre and the State Specialist Hospital, Akure, both hospitals in Ondo ...
PRECISION THERMOMETRIC SYSTEM USING RADIO TELEMETRY WITH COMPUTER INTERFACING

ODO, EKUNDARE AYODELE (Fed University of Technology Akure, 2002-03)

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 ...
A COMPARATIVE STUDY OF PAPER HOLD DOWN SYSTEMS FOR X-V PLOTT~NGINSTRUMENTS

NWOSU, Edwin Ugochukwu (Fed University of Technology Akure, 2010-06)

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 ...
SCATTERING AND ATTENUATION OF CENTIMETRE AND MILLIMETRE RADIO SIGNALS BY TROPICAL RAINFALL.

AJEWOLE, Moses Oludare (Fed University of Technology Akure, 1997-03)

The theoretical investigation of impairment to millimetre and microwave signals by tropical rainfall is reported. Various numerical techniques such as the point matching, perturbation, coupled azimuthal potentials, least ...
THE EFFECT OF RAIN ON SURFACE RADIO REFRACTIVITY OVER NIGERIA

MAJEBI, SUSAN (Fed University of Technology Akure, 2019-10)

The presence of liquid water in the troposphere not only attenuates radio signal but sometimes cancels out the radio link (fading) and this is too great an impact to be ignored by designers of radio communication systems.Hence; ...
MEASUR_EMENT OF NATURAL RADIOACTIVITY OF SOILS FROM SELECTED CITIES IN OYO STATE, SOUTHWESTERN NIGERIA

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

The concentrations of some of the natural radionuclides in the uranium, actinium and thorium series and of4oK in soil samples collected from 9 major towns of Oyo State, Southwestern Nigeria have been determined by gamma ...
TRANSIENT VARIATIONS OF IONOSPHERIC SCINTILLATIONS AND TOTAL ELECTRON CONTENT OVER A TERRESTRIAL POINT WITHIN EQUATORIAL ANOMALY REGION

FAYOSE, Rufus Sola (Fed University of Technology Akure, 2011-03)

The monitoring of Ionospheric Scintillation and variability of Total Electron Content TEC over a terrestrial point within equatorial anomaly region has been achieved by using the NovAtel GSV 4000B GPS-SCINDA system at ...

Now showing items 141-160 of 182

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