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Search Results: 1 - 10 of 563154 matches for " E. A. Areo "
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One-Stage Implicit Rational Runge-Kutta Schemes for Treatment of Discontinous Initial Value Problems
P.O. Babatola,R.A. Ademiluyi,E.A. Areo
Journal of Engineering and Applied Sciences , 2012,
Abstract: This study describes one-stage Implicit Rational Runge-Kutta scheme for treatment of discontinuous ordinary differential equations. Its development adopts power series expansion method (Taylor and Binomial). The analysis of its basic properties uses Dalhquist model test equation. The results show that the schemes are consistent, convergent and A-stable. Numerical computations and comparative analysis with some standard methods show that the new schemes are efficient and accurate.
Generalized Rational Runge-Kutta Method for Integration of Stiff System of Ordinary Differential Equations
P.O. Babatola,R.A. Ademiluyi,E.A. Areo
Journal of Modern Mathematics and Statistics , 2012,
Abstract: This study describes the development, analysis and implementation of generalized implicit rational runge-kutta schemes for integration of stiff system of ordinary differential equations. Its development adopted Taylor and binomial series expansion techniques to generate its parameters. The analysis of its basic properties adopted Dalhquist, A-stability model test equation and the results show that the scheme is, consistent, convergent and A-stable. Numerical results show that the method is accurate and effective.
Accurate Collocation Multistep Method for Integration of First Order Ordinary Differential Equations
E. A. Areo,R.A. Ademiluyi,P.O. Babatola
Journal of Modern Mathematics and Statistics , 2012,
Abstract: In this study we present a collocation multistep method for Integration of first order ordinary differential equations. It is consistent (order seven) zero stable and convergent. When compared with existing multistep method, it is found to be more accurate.
A New One-Twelfth Step Continuous Block Method for the Solution of Modeled Problems of Ordinary Differential Equations  [PDF]
Emmanuel Adegbemiro Areo, Micheal Temitope Omojola
American Journal of Computational Mathematics (AJCM) , 2015, DOI: 10.4236/ajcm.2015.54039
Abstract:

In this paper, we developed a new continuous block method by the method of interpolation and collocation to derive new scheme. We adopted the use of power series as a basis function for approximate solution. We evaluated at off grid points to get a continuous hybrid multistep method. The continuous hybrid multistep method is solved for the independent solution to yield a continuous block method which is evaluated at selected points to yield a discrete block method. The basic properties of the block method were investigated and found to be consistent, zero stable and convergent. The results were found to compete favorably with the existing methods in terms of accuracy and error bound. In particular, the scheme was found to have a large region of absolute stability. The new method was tested on real life problem namely: Dynamic model.

The Snakes of Osun Grove: a World Heritage Site in Osogbo, Nigeria
Akinpelu,Akinsola I; Areo,Adebowale;
Revista de Biología Tropical , 2007,
Abstract: the osun grove, osogbo, nigeria, is a protected area covered by riparian forest, dry high forest and derived savanna. in january and june 2000 a total of 25 of snake species were recorded with afronatrix anoscopus and calabaria reinhardti being prominent. the incidence of philothamnus semivariegatus, a savanna species, may be the result of the invasive savanna produced by farming activities around the grove. nine species, led by a. anoscopus, accounted for 69.7 % of the snake community. the dominant species are either aquatic or terrestrial, with the exception of boiga blandingi and dendroaspis viridis that can be both arboreal and terrestrial, and c. reinhardti that is fossorial. arboreal species mostly preyed on tree frogs and birds including eggs and nestlings, and the aquatic forms preyed on fish and frogs. mammals, reptiles and toads constitute the prey items of terrestrial species while fossorial species feed on annelids, molluscs, arachnids, myriapods, hexapods, amphibians, reptiles and mammals. rev. biol. trop. 55 (2): 717-721. epub 2007 june, 29.
The Snakes of Osun Grove: a World Heritage Site in Osogbo, Nigeria
Akinsola I Akinpelu,Adebowale Areo
Revista de Biología Tropical , 2007,
Abstract: The Osun Grove, Osogbo, Nigeria, is a protected area covered by riparian forest, dry high forest and derived savanna. In January and June 2000 a total of 25 of snake species were recorded with Afronatrix anoscopus and Calabaria reinhardti being prominent. The incidence of Philothamnus semivariegatus, a savanna species, may be the result of the invasive savanna produced by farming activities around the grove. Nine species, led by A. anoscopus, accounted for 69.7 % of the snake community. The dominant species are either aquatic or terrestrial, with the exception of Boiga blandingi and Dendroaspis viridis that can be both arboreal and terrestrial, and C. reinhardti that is fossorial. Arboreal species mostly preyed on tree frogs and birds including eggs and nestlings, and the aquatic forms preyed on fish and frogs. Mammals, reptiles and toads constitute the prey items of terrestrial species while fossorial species feed on annelids, molluscs, arachnids, myriapods, hexapods, amphibians, reptiles and mammals. Rev. Biol. Trop. 55 (2): 717-721. Epub 2007 June, 29. Se registró un total de 25 especies de serpientes en la arboleda de Osun en Osogbo, Nigeria, incluyendo prominentemente dos especies consideradas escasas en el sudoeste de Nigeria: Afronatrix anoscopus y Calabaria reinhardti; Philothamnus semivariegatus, una especie de la sabana, es común posiblemente debido a las actividades de cultivo fuera de la reserva. Junto con las ocho especies abundantes siguientes, A. anoscopus, representó el 69.7 % de la comunidad de serpientes. Las especies dominantes son acuáticas o terrestres, con excepción de Boiga blandingi y Dendroaspis viridis que son arborícolas y terrestres, y C. reinhardti que es fosorial. Las especies fosoriales tienen mayor diversidad trófica.
Aerobic decolourization of two reactive azo dyes under varying carbon and nitrogen source by Bacillus cereus
IO Ola, AK Akintokun, I Akpan, IO Omomowo, VO Areo
African Journal of Biotechnology , 2010,
Abstract: Bacillus cereus isolated from dye industrial waste, that is, effluent and soil samples was screened for its ability to decolourize two reactive azo dye – cibacron black PSG and cibacron red P4B under aerobic conditions at pH 7 and incubated at 35°C over a five day period. Different carbon and nitrogen sources were used for the decolourization study. B. cereus was able to decolourize cibacron red P4B by (81%) using the combination of ammonium nitrate and sucrose, while it decolourizes cibacron black PSG by (75%) using yeast extract and lactose.
On chromospheric variations modeling for main-sequence stars of G and K spectral classes  [PDF]
E. A Bruevich
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.38087
Abstract: We present a method of 13 late-type main-sequence stars chromospheric flux observation data calculations. These Sun-like stars have well-determined cyclic flux variations similar to the 11-year solar activity cycle. Our flux prediction is based on chromospheric HK emission time series measurements from the Mount Wilson Observatory and comparable solar data. We show that solar three - component modeling explains well the stellar observations. We find that the 10 - 20% of K - stars disc’s surfaces are occupied by bright active regions.
Chronic effect of olive oil on some neurotransmitter contents in different brain regions and physiological, histological structure of liver and kidney of male albino rats  [PDF]
A. E. Bawazir
World Journal of Neuroscience (WJNS) , 2011, DOI: 10.4236/wjns.2011.13005
Abstract: Olive oil is an important source of mono-unsaturated fat and a prime component of the Mediterranean diet. The beneficial health effects of olive oil are due to both its high content of mono-unsaturated fatty acids and its high content of anti-oxidative substances. The objective of this study was to investigate the basis for the epidemiological information relating to the health benefits associated with the consumption of ex-tra-virgin olive oil (EVOO). The effect of olive oil on norepinephrine (NE), dopamine (DA), serotonin (5-HT) and gamm-aminobutyric acid (GABA) con-tents in different brain regions and histological structure of liver and kindey of male albino rats was studied. The chronic administration of olive oil (7.5 mg/kg body wt.) caused a significant increase in norepinephrine (NE), dopamine (DA) , serotonin (5-HT) and gamm-aminobutyric acid (GABA) con-tent in different brain regions (Cerebellum, striatum, cerebral cortex, hypothalamus, brain steam and hip-pocampus) of male albino rats. The increase in NE, DA, 5-HT, and GABA content in the different CNS areas of male albino rat may be due to the inhibition of Ca2+/calmodulin binding which plays an important role in the release of these neurotransmitters. The results, also, revealed that urea and creatinne con-centrations in rats with oral administration with olive oil were decreased. Meanwhile, the activities of the enzymes AsT, AlT and ALP were elevated. The pre-sent results indicated that there is no change in tis-sues of kidney after treated with virgin olive oil. Olive oil may potentially be safe for use as a sedative drug. improvement also led to the reductions in risk of Alzheimer’s and Parkinson’s diseases.
Impact on Water Resources in a Mountainous Basin under the Climate Change Transient Scenario (UKTR)  [PDF]
E. A. Baltas
American Journal of Climate Change (AJCC) , 2014, DOI: 10.4236/ajcc.2014.31010
Abstract:

The impact of climate change on the hydrological regime and water resources in the basin of Venetikos river, in Greece is assessed. A monthly conceptual water balance model was calibrated in this basin using historical hydro meteorological data. This calibrated model was used to estimate runoff under a transient scenario (UKTR) referring to year 2080. The results show that the mean annual runoff, mean winter and summer runoff values, annual maximum and minimum values, as well as, monthly maximum and minimum, will be reduced. Additionally, an increase of potential and actual evapotranspiration was noticed due to temperature increase.

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