Lagos, Nigeria
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Emetere M.E.,Covenant University
Journal of Thermophysics and Heat Transfer | Year: 2014

The equations of energy balance and heat conductivity are queried by introducing known parameters using virtual mathematical experimentation. Distribution of temperature by layers in depth for samples of superconducting material is obtained under different conditions. The structural defect at different state-liquid and solid was analyzed. The theoretical model generated was validated by experimental data. The temperature distribution under the irradiating laser intensity (0.45 W) shows an effective decay rate probability density function that is peculiar to the concept of photoluminescence. © 2014 by the American Institute of Aeronautics and Astronautics Inc. All rights reserved.


Oyedepo S.O.,Covenant University
Renewable and Sustainable Energy Reviews | Year: 2012

The fuel driving the engine of growth and sustainable development of any nation is the nation's access to reliable and adequate energy. Access to energy is a crucial enabling condition for achieving sustainable development. Prudent energy policies and research can play an important role in steering both industrialized and developing countries onto more sustainable energy development paths. Specifically, they can strengthen the three pillars of sustainable development: the economy, by boosting productivity; social welfare, by improving living standards and enhancing safety and security; and the environment, by reducing indoor and outdoor pollution and remediating environmental degradation. Many factors that need to be considered and appropriately addressed in moving towards energy sustainability in Nigeria are examined in this article. These include full exploitation and promotion of renewable energy resources and application of energy conservation measures in various sectors such as manufacturing industrial set-up, office and residential buildings and transportation. © 2012 Elsevier Ltd. All rights reserved.


Ajani O.O.,Covenant University
European Journal of Medicinal Chemistry | Year: 2014

Quinoxalines belong to a class of excellent heterocyclic scaffolds owing to their wide biological properties and diverse therapeutic applications in medicinal research. They are complementary in shapes and charges to numerous biomolecules they interact with, thereby resulting in increased binding affinity. The pharmacokinetic properties of drugs bearing quinoxaline cores have shown them to be relatively easy to administer either as intramuscular solutions, oral capsules or rectal suppositories. This work deals with recent advances in the synthesis and pharmacological diversities of quinoxaline motifs which might pave ways for novel drugs development. © 2014 Elsevier Masson SAS. All rights reserved.


Akinwumi I.I.,Covenant University
Indian Journal of Traditional Knowledge | Year: 2014

Villages in Oka, Use and Uselu were visited and interviews of earth constructors in these locations were conducted to determine their mud house construction techniques. Earth building materials were also taken from these villages and laboratory tests were conducted on the soil samples in order to classify them. Natural moisture content, sieve and hydrometer analyses, and Atterberg limits tests were performed in the laboratory. The interaction between the culture, tradition and earth construction technique of the Benin people was revealed from the interview sessions. The soil samples at the three locations were suitable for mud house construction, based on the results of laboratory tests. It was revealed from the interview sessions that the construction technique widely used in these locations is similar in procedure to that of cob construction, except that straws are not added. The soil samples from the three villages were classified as silty, clayey sand (SC-SM), according to Unified Soil Classification System. According to American Association of State Highway and Transportation Officials, soil samples from Use, Uselu and Oka were classified as A-4, A-6 and A-7, respectively. The soil samples taken from Use and Uselu were found to be more suitable for mud house construction than that from Oka, based on the results of laboratory tests. © 2014 National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.


Emetere M.E.,Covenant University
Plasma Science and Technology | Year: 2015

The functionality of the plasma antenna has been narrowed to types and brand names only. The physics of its operation has been neglected and has stagnated technological innovations. The magnetic field in the sheath and plasma were investigated. Notable specifications were worked out in the proposed improved cylindrical monopole plasma antenna. The occurrence of femto spin demagnetization was discovered between the duration of switch on and switch off of the antenna. This phenomenon seems transient because magnetization is highest at the switch on/off point.


Ohunakin O.S.,Covenant University
Renewable Energy | Year: 2011

This paper presents an assessment of wind energy potentials of six selected high altitude locations within the North-West and North-East geopolitical regions, Nigeria, by using 36-year (1971-2007) wind speed data subjected to 2-parameter Weibull distribution functions. The results showed that the maximum mean wind speed is obtained in Katsina as 9.839 m/s while the minimum value of 3.397 m/s is got in Kaduna for all the locations considered. The annual wind power density and energy variation based on the Weibull analysis ranged from 368.92 W/m 2 and 3224.45 kWh/m 2/year to 103.14 W/m 2 and 901.75 kWh/m 2/year in Kano and Potiskum for the maximum and minimum values respectively. Furthermore, Katsina and Kano will be suitable for wind turbine installations while Gusau will only be appropriate for wind energy utilization using taller wind turbine towers whereas Kaduna, Bauchi and Potiskum will be considered marginal for wind power development based of their respective annual mean wind speeds and power densities. © 2011 Elsevier Ltd.


Oyedepo S.O.,Covenant University
Renewable and Sustainable Energy Reviews | Year: 2014

The importance of energy availability in the economic growth, social and political development of every nation cannot be overemphasized. Affordable and reliable energy availability is the precondition for sustainable development. Sustainable development calls for an efficient, reliable and decentralized energy economy, based on local and clean energy sources, in which the price paid by the consumer will reflect the real cost of energy products to the economy. There is clear evidence that Nigeria is blessed with abundant resources of fossil fuels as well as renewable energy resources. The major challenge is inefficient utilization of energy in the country. There is no doubt that the present power crisis afflicting Nigeria will persist unless the government diversifies her energy sources and adopt new available technologies to reduce energy wastages and save cost. This study examines the perspective of energy efficiency and renewable energy in the making of strategies for a sustainable development in Nigeria. Such strategies involve energy savings on the demand side, efficiency improvements in the energy production, and replacement of fossil fuels by various sources of renewable energy. Factors that need to be considered in the shift to its sustainable energy future are examined in this article. © 2014 Elsevier Ltd.


Ajayi O.O.,Covenant University
Renewable and Sustainable Energy Reviews | Year: 2013

The study exposed the energy situation of ECOWAS member states with particular focus on Nigeria, Niger Republic, Togo, Benin Republic and Ghana. It highlighted the various indices that represent the state of energy production and distribution and surveyed the renewable energy potential of the countries. The factors responsible for the energy poverty experienced by the countries were discussed and some implications of the energy state of the countries were exposed. It was found that although the countries have very good potential for renewable energy application for power generation, they were however limited by certain factors. These factors include a lack of or not enough robust national renewable energy resource measurements and assessments, and also lack of economic incentives to favour renewable energy technology development. Some policy suggestions that will promote the development and growth of sustainable energy in the countries were proposed. © 2013 Elsevier Ltd.


Ohunakin O.S.,Covenant University
Renewable and Sustainable Energy Reviews | Year: 2011

This paper presents a statistical analysis of wind characteristics of five locations covering the North-Central (NC) geo-political zone, Nigeria, namely Bida, Minna, Makurdi, Ilorin and Lokoja using Weibull distribution functions on a 36-year (1971-2007) wind speed data at 10 m height collected by the meteorological stations of NIMET in the region. The monthly, seasonal and annual variations were examined while wind speeds at different hub heights were got by extrapolating the 10 m data using the power law. The results from this investigation showed that all the five sites will only be adequate for non-connected electrical and mechanical applications with consideration to their respective annual mean wind speeds of 2.747, 4.289, 4.570, 4.386 and 3.158 m/s and annual average power densities of 16.569, 94.113, 76.399, 71.823 and 26.089 W/m 2 for Bida, Minna, Makurdi, Ilorin and Lokoja in that order. Weibull parameters k and c together with the energies for the respective locations were computed while further observation revealed that Bida, Minna, Makurdi and Ilorin are windier in the morning than afternoon periods for many months in a year whereas Lokoja had a windy afternoon. Additionally, four wind turbines De wind 48 - 600 kW, De wind D6 - 1250 kW, De wind D7 - 1500 kW and De wind D8 - 2000 kW were technically assessed for electricity generation by calculating their respective yearly energy output and capacity factor in all the locations. © 2010 Elsevier Ltd. All rights reserved.


Ohunakin O.S.,Covenant University
Renewable and Sustainable Energy Reviews | Year: 2011

This paper evaluates wind speed data of 37 years, 1971-2007 periods measured at 10 m height for five meteorological stations in North-East geo-political zone, Nigeria, namely Bauchi, Nguru, Maiduguri, Yola and Potiskum that have been analyzed statistically to examine the monthly and seasonal variation of the wind characteristics. Wind data at 50 m hub height were obtained by extrapolating the 10 m data using the power law. The results proved Bauchi and Maiduguri to be the best sites among the five locations with monthly mean wind speeds ranging from 3.96 to 7.04 m/s and 4.49 to 6.10 m/s respectively while monthly average power density varies between 61.33-299.88 W/m 2 and 63.80-173.70 W/m 2 in that order, followed by Potiskum recording monthly mean wind speed ranging from 3.92 to 5.68 m/s coupled with an average power density between 53.82 and 150.84 W/m 2 in April and June. A Weibull distribution also gave a better fit than actual data while further investigations revealed higher wind speeds in the morning hours for Nguru, Maiduguri and Potiskum together with equal monthly periods of rainy and wet seasons whereas Bauchi and Yola are windier in the afternoon than morning periods with almost comparable months of rainy and dry seasons. Furthermore, wind availability shows that Maiduguri has wind speed above 4 m/s, 100% of the time in the two seasons while Bauchi, Nguru, Potiskum and Yola have approximately 80 and 100%, 50 and 50%, 75 and 75%, 50 and 50% periods of wind availability above 4 m/s in the dry and rainy seasons respectively. © 2010 Elsevier Ltd. All rights reserved.

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