DSpace Community:
http://repository.fuoye.edu.ng:80/handle/123456789/113
2024-03-25T06:00:48ZCOMPARISON OF CALCULATED WORK FUNCTION OF ELEMENTS EXPRESSED IN TERM OF FERMI ENERGY AND DENSITY OF FREE ELECTRON WITH OTHER METHODS
http://repository.fuoye.edu.ng:80/handle/123456789/1332
Title: COMPARISON OF CALCULATED WORK FUNCTION OF ELEMENTS EXPRESSED IN TERM OF FERMI ENERGY AND DENSITY OF FREE ELECTRON WITH OTHER METHODS
Authors: ADEBAYO SAMUEL, FADAHUNSI; Olubosede, O. Dr.
Abstract: The purpose of this project is to derive an expression for work function expressed
in terms of Fermi energy and electron density parameter. This approach is referred
to as the Metallic Plasma Model. After calculating the work function of metals
using this approach, the result gotten are then analyzed and compared to the
experimental values of work function for these metals. Also, the results gotten
from this approach for each metal is compared to that which was gotten using other
approaches such as SJM- Simple Jellium Model and Ab- initio method.2015-09-01T00:00:00ZCONSTRUCTION OF A 2KVA MODIFIED SINE WAVE INVERTER WITH AN IN-BUILT CHARGE CONTROLLER
http://repository.fuoye.edu.ng:80/handle/123456789/1296
Title: CONSTRUCTION OF A 2KVA MODIFIED SINE WAVE INVERTER WITH AN IN-BUILT CHARGE CONTROLLER
Authors: FAGITE, OLUWATOYIN OLUWAKEMI
Abstract: The purpose of this project is to design and construct a 1600W (2kVA), 220V
inverter at a frequency of 50Hz. This device is constructed with locally
sourced materials of regulated standards. The basic principle of its operation
is a simple conversion of 12V Direct Current (DC) from a battery using
semiconductors at a frequency of 50Hz, to a 220V Alternating Current (AC)
across the windings of a transformer. An additional power supply to the
public power supply having the same power output is thus provided at an
affordable price. This project is based on the design of 2kVA (1.6 kW) inverter
system and incorporate the use of switching scheme automatic voltage
regulator. The inverter is set to shut-down if the threshold voltage of 11.5V
(Min.) is reached and more 13.5V (Max.) during the charging. The switch
mode of a modified wave-switching scheme uses an astablemultivibrator to
switch on the semiconductor switches-Metal Oxide Semiconductor Field Effect
Transistor (MOSFET).2015-10-01T00:00:00ZA RADIOMETRIC MAPPING OF FEDERAL UNIVERSITY OYE - EKITI MAIN CAMPUS, SOUTHWESTERN NIGERIA
http://repository.fuoye.edu.ng:80/handle/123456789/1127
Title: A RADIOMETRIC MAPPING OF FEDERAL UNIVERSITY OYE - EKITI MAIN CAMPUS, SOUTHWESTERN NIGERIA
Authors: ADEJUGBAGBE, TAIWO
Abstract: The radiometric mapping of Federal University Oye-Ekiti Main Campus along Are-Afao
Locality was carried out in this study. For this purpose, measurement of the radiation
levels were done along 11 major traverses covering the entire developed area of the
Campus. The measurement were carried out by means of a very sensitive portable DSM-
500 Geiger Mueller Survey Meter, with serial number 10005. The results obtained
showed that the global average of radiation level for Federal University Oye-Ekiti Main
Campus was 0.055µSv/hr translating to an annual dose rate of 0.482mSv/yr which falls
below the world average dose limit of 2.4mSv/yr for environmental background radiation
as reported by UNSCEAR,
ICRP (2015-10-01T00:00:00ZProton induced X-ray emission analysis of soils with various length of fallow: The effect on soil total elemental composition
http://repository.fuoye.edu.ng:80/handle/123456789/1110
Title: Proton induced X-ray emission analysis of soils with various length of fallow: The effect on soil total elemental composition
Authors: Inyang, E.P.; Oketayo, O.O.; Obiajunwa, E.I.
Abstract: Fallowing of whatever kind is beneficial to elemental (nutrients) recovery. To what length (years) should
a land be left fallowed for optimum elemental recovery is of serious concern to stakeholders owing to the
limited availability of land. This work aimed at accessing the effect of fallow duration on soil total
elemental composition. Proton induced X-ray emission (PIXE) technique has been used to assess the
effect of relative longer length of fallowed land on soil total elemental composition using a 5SDH Tandem
Pelletron accelerator available at Centre for Energy Research and Development, Obafemi Awolowo
University Ile-Ife. The results at a 2.5 MeV energy revealed the presence of elements: Si, P, Ca, Ti, Mn, Fe,
Zn, Rb and Zr with the only sharp difference being the fact that elements Zn and Rb were only detected in
the soil of continuous cropping probably due to the agrochemical applications prevalent in the study
area. The inter-elemental correlation trend revealed a significant positive correlation of P to Ti and Cr
(.916 and .937) at P < 0.05 level of significance. A similar trend was obtained for Ca to Mn and Zr (.955
and .925). There was a very strong positive significant inter elemental correlation between Ti and Cr
(.994) at P < 0.01 level of significance. On the whole, leaving a land fallow for a relative longer period of
time is beneficial in nutrients replenishment.2015-10-16T00:00:00ZAssessment of Radiation Emission from Waste Dumpsites in Lagos State of Nigeria
http://repository.fuoye.edu.ng:80/handle/123456789/1073
Title: Assessment of Radiation Emission from Waste Dumpsites in Lagos State of Nigeria
Authors: Olubosede, olusayo; Akinnagbe, .O.B .; Adekoya, O
Abstract: This paper takes a look at the total radiation emanating from waste dumpsites in two cities of Lagos state Nigeria. This was
achieved using a radiation survey meter (RADALERT50) t
o measure the radiation exposure rate in micro sievert per hour
(μSvhr
-
1
). Readings were taken by placing the detector at gonad level i.e. about 1 meter above the ground level in five sampling
locations; this was done at an interval of 5meters away from th
e point of reference up to 30 meters. The results obtained revealed
that the annual absorbed dose rate measurements taken inside the five dumpsites are 29.80μSvhr
-
1
, 28.05μSvhr
-
1
, 19.29μSvhr
-
1
,
17.53μSvhr
-
1
and 15.78μSvhr
-
1
. This is far lower than the aver
age of 70μSvhr
-
1
recommended by UNESCO on effect of Atomic
Radiation2012-05-08T00:00:00Z