Ojugo A.A.,Federal University of Petroleum Resources
Proceedings - 2015 2nd International Conference on Mathematics and Computers in Sciences and in Industry, MCSI 2015 | Year: 2015
Diabetes Mellitus (silent killer or sugar disease) is a metabolic disease characterized by high glucose levels, either in a body with insufficient insulin to breakdown glucose, or body that is resistant to effects of insulin. To improve early diagnosis, data-mining tools are used to help physicians effectively classify the disease. Study presents a hybrid fuzzy, genetic algorithm trained neural network model as a decision support system for diabetes classification. Adopted data is split into: training, cross validation and testing to aid model validation with appropriate weights and biases set for each variables. Results indicate that age, obesity and family relations (in first and second degree), environmental conditions are critical factors to be watched, While in gestational diabetes, mothers with or without a previous case of GDM is confirmed if there is: (a) history of babies with weight > 4.5kg at birth, (b) resistant to insulin showing polycystic ovary syndrome, and (c) have abnormal tolerance to insulin. © 2015 IEEE.
Asibor G.I.,Federal University of Petroleum Resources
Journal of Sustainable Development | Year: 2015
The benthic macro-invertebrate fauna of Asejire Reservoir, Southwest Nigeria were investigated for two years (2004-2006) covering both the rainy and dry seasons. The major objective of the study was to provide baseline information on aspects of the biology (taxonomic composition, occurrence, distribution and abundance) of the benthic macro-invertebrates, characteristics of the reservoir sediment. A total of twenty sampling stations were established to represent the various sections and regime of the lake. Sediment samples were collected from each station at bimonthly intervals using an improvised Van-veen grab. Altogether a total of three hundred and twenty composite samples were collected and analysed and assessed. The benthic macro-invertebrates comprised twenty-eight species in the class Insecta (13 taxa), Gastropoda (9 taxa), Bivalvia (2 taxa) while Arachnida, Malacostraca, Hirudinea and Gordiadea were made of one species each. Altogether a total abundance of 364,351 individual macro-invertebratess species were collected from the bottom sediment. The dominant species were Potadomamoerch, P. freethi and Melanoidestubaculata with a population of 119,985, 66,660 and 32,768 individual taxawhile the least occurring taxa were Sphaeriumsp and Hydracarinasp with a population of 550 and 1,350 individual. Considerable close association (p < 0.05) were found among many of the macro-invertebrates species. Species abundance was higher in the dry season (46 ±6.5 organism m-2) than in the rainy season (36 ± 6.0 organism m-2) but the difference between the two seasons was not significant (p > 0.05). More species were found in the littoral than in the open water region of the reservoir and the difference between the two regions was significant (p < 0.05). The differences in the abundance of species in the three reaches were also significant (p < 0.05). In conclusion, on the basis of benthic macro-invertebrate taxa composition and abundance, Asejire Reservoir can be inferred to be rich in fauna composition and therefore fairly clean and unpolluted. © by the authors.
Agbalagba E.O.,Federal University of Petroleum Resources |
Avwiri G.O.,University of Port Harcourt |
Chad-Umoreh Y.E.,University of Port Harcourt
Journal of Environmental Radioactivity | Year: 2012
The analysis of naturally occurring radionuclides ( 226Ra, 232Th and 40K) has been carried out in soil samples collected from oil and gas field environment of Delta state, using gamma spectroscopy operated on a Canberra vertical high purity 2'×2' NaI(TI) detector. The activity concentration of the samples ranges from 19.2 ± 5.6Bqkg -1 to 94.2 ± 7.7Bqkg -1 with mean value of 41.0 ± 5.0Bqkg -1 for 226Ra, 17.1 ± 3.0Bqkg -1 to 47.5 ± 5.3Bqkg -1 with mean value of 29.7 ± 4Bqkg -1 for 232Th and 107.0 ± 10.2Bqkg -1 to 712.4 ± 38.9Bqkg -1 with a mean value of 412.5 ± 20.0Bqkg -1 for 40K. These values obtained are well within the world range and values reported elsewhere in other countries, but are little above some countries reported average values and some part of Nigeria. The study also examined some radiation hazard indices, the mean values obtained are, 98.5 ± 12.3Bq.kg -1, 0.8Bqkg -1, 54.6ηGyh -1, 0.07μSvy -1, 0.3 and 0.4 for Radium equivalent activity (Ra eq), Representative level index (Iγ), Absorbed Dose rates (D), Annual Effective Dose Rates (E ff Dose), External Hazard Index (H ex) and Internal Hazard Index (H in) respectively. These calculated hazard indices to estimate the potential radiological health risk in soil and the dose rate associated with it are well below their permissible limit. The soil and sediments from the study area provide no excessive exposures for inhabitants and can be use as construction materials without posing any immediate radiological threat to the public. However, oil workers in the fields and host communities are cautioned against excess exposure to avoid future accumulative dose of these radiations from sludge and sediment of this area. © 2011 Elsevier Ltd.
Gregory A.O.,University of Port Harcourt |
Agbalagba E.O.,Federal University of Petroleum Resources
Environmental Earth Sciences | Year: 2014
Concentration of natural radionuclides in three major staple food crops cultivated around a fertilizer plant in Onne, Rivers State Nigeria and the cultivated soil samples were determined using gamma spectroscopy operated on a Canberra vertical high purity 3″ × 3″ NaI(TI) detector. The average activity concentration of 238U, 232Th and 40K was determined, for cassava flour (U 19.3 ± 5.0, Th 11.4 ± 3.3, K 426.9 ± 33.8) Bq kg-1, for yam flour (U 6.3 ± 1.8, Th 8.4 ± 2.6, K 227.0.9 ± 27.3) Bq kg-1 while for cocoyam flour (U 7.5 ± 2.7, Th 7.1 ± 2.3, K 195.8 ± 25.83) Bq kg-1. The mean activity concentration for soil samples is 18.7 ± 3.7 Bq kg-1, 18.0 ± 3.8 Bq kg-1 and 308.4 ± 22.4 Bq kg-1 for 238U, 232Th and 40K, respectively. These values obtained show enhanced 40K concentration which is attributed to the effluent discharge from a fertilizer plant and its applications to farmlands, but 238U, 232Th values are well within the global average and values reported in some regions and countries of the world. Radiation hazard indices obtained to estimate potential radiological health risk in both foodstuffs and soil samples are well below their permissible limit as set by UNSCEAR [Sources and effects of ionizing radiation (Report to the General Assembly), 2000]. The rate of radionuclides transfer from soil to crops was moderate with mean transfer factors of 232Th < 238U < 40K. © 2013 Springer-Verlag Berlin Heidelberg.
Okedoye A.M.,Federal University of Petroleum Resources
Journal of Naval Architecture and Marine Engineering | Year: 2014
This paper study unsteady MHD mixed convection flow past an infinite vertical oscillating plate through porous medium, taking account of the presence of free/forced convection and mass transfer. Using similarity transformation, the coupled non – linear governing equations are solved numerically by applying the combination of the base scheme sub-methods – midpoint, and a method enhancement scheme Richardson extrapolation technique together with Fehlberg fourth-fifth order Runge-Kutta shooting iteration method with degree four interpolant. The results are obtained for velocity, temperature, concentration. The effects of various material parameters are discussed on flow variables and presented by graphs. © 2014 ANAME Publication. All rights reserved.