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Search Results: 1 - 10 of 482621 matches for " M. O. Osilike "
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Common fixed points of a finite family of asymptotically pseudocontractive maps
M. O. Osilike,B. G. Akuchu
Fixed Point Theory and Applications , 2004, DOI: 10.1155/s1687182004312027
Abstract: Convergence theorems for approximation of common fixed points of a finite family of asymptotically pseudocontractive mappings are proved in Banach spaces using an averaging implicit iteration process.
Hybrid Iteration Method for Fixed Points of Nonexpansive Mappings in Arbitrary Banach Spaces
M. O. Osilike,F. O. Isiogugu,P. U. Nwokoro
Fixed Point Theory and Applications , 2008, DOI: 10.1155/2007/64306
Abstract: We prove that recent results of Wang (2007) concerning the iterative approximation of fixed points of nonexpansive mappings using a hybrid iteration method in Hilbert spaces can be extended to arbitrary Banach spaces without the strong monotonicity assumption imposed on the hybrid operator.
Common fixed points of a finite family of asymptotically pseudocontractive maps
Osilike MO,Akuchu BG
Fixed Point Theory and Applications , 2004,
Abstract: Convergence theorems for approximation of common fixed points of a finite family of asymptotically pseudocontractive mappings are proved in Banach spaces using an averaging implicit iteration process.
Hybrid Iteration Method for Fixed Points of Nonexpansive Mappings in Arbitrary Banach Spaces
Osilike MO,Isiogugu FO,Nwokoro PU
Fixed Point Theory and Applications , 2007,
Abstract: We prove that recent results of Wang (2007) concerning the iterative approximation of fixed points of nonexpansive mappings using a hybrid iteration method in Hilbert spaces can be extended to arbitrary Banach spaces without the strong monotonicity assumption imposed on the hybrid operator.
Is Methanol Using Co2 From the Atmosphere a New Fuel to Replace Gasoline?  [PDF]
John OM. Bockris
Smart Grid and Renewable Energy (SGRE) , 2011, DOI: 10.4236/sgre.2011.22017
Abstract: The recent disaster in the Gulf has drawn attention to the longevity of the oil supply and what alternative to gasoline is the appropriate fuel to which we should turn. The suggestion of Methanol as a substitute for gasoline as been greatly strengthened by George Olah in his publication UBeyond Oil and Gas: The Methanol EconomyU. However, there remained the question of burning methanol without special attention to its method of synthesis which would not add to the CO2 content of the atmosphere. Hydrogen has often been suggested as an alternative fuel because it burns clean. A comparison is made of Hydrogen and Methanol synthesized with hydrogen and CO2 from the atmosphere or biomass. The cost of the methanol as prepared would be $28 to $31 per GJ. Development is needed in the method by which to obtain the CO2from the atmosphere Uin a streamU. Three possible methods are outlined. Only one has been subject to detailed system analysis. However, two independent calculations give highly similar costs. Water, air and wind to pro-duce hydrogen for electrolysis of water, are the only resources necessary to make the methanol required. Changing over to any alternative fuel will impact the Oil companies. However, a change to methanol could be a long term solu-tion for them; whereas a trend towards electricity as the overall medium of energy would not be.
Allelopathic Effects of Some Selected Tree Species on the Germination and Growth of Cowpea (Vigna unguiculata L. Walp.)  [PDF]
M. O. Aleem, L. O. Alamu, O. S. Olabode
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.44037
Abstract:
The allelopathic effect of three tree species (Azardiracta indica, Vitellaria paradoxa, and Parkia bi-globosa) on germination and growth of cowpea was investigated in the Southern Guinea Savannah agro ecological zone of Nigeria. The experiment was laid out in Randomized Complete Block Design (RCBD) with three (3) replicates. Data were collected on germination, plant height, stem diameter, number of leaves, number of branches, root length, the above grand biomass and the below grand biomass and were subjected to statistical analysis using Analysis of Variance (ANOVA) while the significant mean was separated using Duncan’s Multiple Range Test (DMRT) at 5% possibility level. Results showed that the tree species brought about considerable inhibition in the germination of cowpea seeds and in its growth parameters. The statistical germination value of the cowpea seeds under the tree species had decreased value thus indicating that growth inhibitions were seriously felt. It was apparent that Parkia biglobosa (53.33) and Vitellaria paradoxa (60.00) had more inhibitory effect on cowpea seeds germinability than that of Azardiracta indica. (63.33) while all the treatments are lower than that of control (100). The tree species had similar inhibition capability in the cowpea plant height, stem circumference, number of leaves, above grand biomass and below grand biomass. However, in all treatment, statistic showed that there is no significant difference (p < 0.05) among the means.
Nanoindentation Study on Tourmaline  [PDF]
M.O. Adeoye, O.O. Adewoye
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2006, DOI: 10.4236/jmmce.2006.51004
Abstract: Nanoindentation tests were performed on the basal (0001) and prismatic (10ī0) surfaces of tourmaline crystals. These results were used along with Vickers microhardness tests to investigate the hardness of the material on these surfaces at different load regimes. It was found that the (0001) surface indicated a higher hardness at ultra-low loads while (10ī0) becomes the harder plane at higher loads. Evidence of plastic deformation at room temperature in the otherwise very brittle (ceramic) material was also established, and the elastic modulus was determined.
Investigation Of Hardness Anisotropy In Tourmaline  [PDF]
M.O. Adeoye, O.O. Adewoye
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2004, DOI: 10.4236/jmmce.2004.32011
Abstract: Tourmaline is a ring silicate material with a hexagonal crystal structure. Tourmaline crystal is made use of as an electronic component, e.g, as a transducer, mainly because of the anisotropy it exhibits in its properties. Microindentation technique was employed in the research reported in this paper, using a Knoop indenter, to investigate the anisotropy in the hardness of the tourmaline crystal on its two major crystallographic planes: (0001) and {10 1 0}. The material was found to exhibit hardness anisotropy in conformity with its rotary symmetry elements. The material was identified and analysed using various x-ray techniques, and was found to contain some impurities as expected of natural crystals. Tourmaline was found to have a Si/Al ratio of 1.4. The orientations of the crystal samples were determined by obtaining and indexing the Laue x-ray back-reflection patterns of the crystal samples.
Monitoring Groundwater Contamination Using Surface Electrical Resistivity and Geochemical Methods  [PDF]
O. Akankpo, M. U. Igboekwe
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.35040
Abstract: Surface electrical resistivity has been used as a tool in the detection of groundwater contamination. In this work, five geoelectric soundings with two at waste dumpsites have been carried out in Uyo, Southwestern Nigeria to map the gross layered structure of the refuse as well as the extent of groundwater contamination. The geology of the area (Benin Formation) mainly consists of fine-medium-coarse grained sands. The data of five Schlumberger Vertical Electrical Soundings (VES), with a maximum of AB/2=500 m, were analyzed using Hemkler computer program. In general, there exists a common feature in the resistivity variation pattern of high-low-high-low-high in the area. The result shows a wide range of resistivity variation ranging from 2.0 to 60700 ?m. Based on the survey results, the resistivity values less than 75 ?m shows contamination due to waste at Eka street and Udo street. Also, the high resistivity value at mechanic village (60700 ?m) may be related to the waste oil deposit due to the automobile repair activities. A comparison of the resistivity values and the curve types at the dumpsites (Eka street and Udo street) and other locations show that the two dumpsites have an H curve type indicating contaminated zones, while other locations have a K curve type indicating non contaminated zones. Hydrochemical analysis of groundwater samples collected in the area was also carried out for some physico-chemical parameters. The results produced higher concentration of conductivity, total dissolved solids and chloride values for water collected at close locations to dumpsites than those far away from the dumpsites: an evidence for a quantitative assessment of groundwater contamination.
Structure and Curvatures of Trajectories of a 2D Log-Gas  [PDF]
M. P. Pato, O. Bohigas
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.25005
Abstract: A model is constructed to study the statistical properties of irregular trajectories of a log-gas whose positions are those of the complex eigenvalues of the unitary Ginibre ensemble. It is shown that statistically the trajectories form a structure that reveals the eigenvalue departure positions. It is also shown that the curvatures of the ensemble of trajectories are Cauchy distributed.
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