Jimoh O.A.,Universiti Sains Malaysia |
Jimoh O.A.,Federal University, Lokoja |
Okoye P.U.,Universiti Sains Malaysia |
Ariffin K.S.,Universiti Sains Malaysia |
And 2 more authors.
Journal of Cleaner Production | Year: 2017
Green templating agents for evolving new morphologies and shapes of precipitated calcium carbonate (PCC) with wide-ranging potential applications are desirable. In this study, aloe vera (Aloe barbadensis Miller) extract (0.5%–5%, v/v) was utilized as a green modifier for the synthesis of a PCC composite with a new crystalline structure. A continuous PCC synthesis was conducted using a tall and narrow tubular column reactor with a favorable height-to-diameter ratio (l/d = 150 cm/10 cm). The morphology, particle size, crystalline structure, and thermal characteristics of the synthesized PCC were studied by scanning electron microscopy, X-ray diffraction, particle size distribution, thermogravimetric analysis, differential thermal analysis, and Fourier transform infrared spectroscopy. Aloe vera extract concentrations above 0.5% (v/v) significantly influenced the particle size and morphology of the synthesized PCC but only marginally influenced the PCC yield. Under ambient temperature, and using aloe vera extract concentration above 0.5% (v/v), and 1 L/min CO2 flow rate, a rhombohedral calcite and aragonite composite with a polycrystalline dumbbell-like structure with radiating ends was produced. The morphology, particle size, and polymorphs of the CaCO3 crystals could be further tuned by varying the concentrations of the aloe vera extract. The synthesized PCC had a particle in the size range of 120–200 nm. © 2017 Elsevier Ltd
Oluwagbemi O.,Federal University, Lokoja |
Oluwagbemi F.,Covenant University |
Abimbola O.,Covenant University
Informatics in Medicine Unlocked | Year: 2016
Ebola Virus Disease (EVD) also known as the Ebola hemorrhagic fever is a very deadly infectious disease to humankind. Therefore, a safer and complementary method of diagnosis is to employ the use of an expert system in order to initiate a platform for pre-clinical treatments, thus acting as a precursor to comprehensive medical diagnosis and treatments. This work presents a design and implementation of informatics software and a knowledge-based expert system for the diagnosis, and provision of recommendations on the appropriate type of recommended treatment to the Ebola Virus Disease (EVD). In this research an Ebola fuzzy informatics system was developed for the purpose of diagnosing and providing useful recommendations to the management of the EVD in West Africa and other affected regions of the world. It also acts as a supplementary resource in providing medical advice to individuals in Ebola – ravaged countries. This aim was achieved through the following objectives: (i) gathering of facts through the conduct of a comprehensive continental survey to determine the knowledge and perception level of the public about factors responsible for the transmission of the Ebola Virus Disease (ii) develop an informatics software based on information collated from health institutions on basic diagnosis of the Ebola Virus Disease-related symptoms (iii) adopting and marrying the knowledge of fuzzy logic and expert systems in developing the informatics software. Necessary requirements were collated from the review of existing expert systems, consultation of journals and articles, and internet sources. Online survey was conducted to determine the level at which individuals are aware of the factors responsible for the transmission of the Ebola Virus Disease (EVD). The expert system developed, was designed to use fuzzy logic as its inference mechanism along with a set of rules. A knowledge base was created to help provide diagnosis on the Ebola Virus Disease (EVD). The Root Sum Square (RSS) was adopted as a fuzzy inference method. The degree of participation of each input parameter was shown using the triangular membership function and the defuzzification technique used is the Center of Gravity (CoG). The resulting software produced a user-friendly desktop-based, Windows-based, application and the tools used were explained in the results section in three (3) separate phases. First, a comprehensive online survey was conducted over a period of about 3–9 months. 100 Participants participated in the survey on the perception and knowledge analysis of different individuals about Ebola Virus Disease (EVD) transmission factors. 31% of the participants didn't know that there is presently no cure for Ebola. 28% believed that there is presently a cure for Ebola. 43% agreed that Ebola is both air-borne and water-borne, while 33% disagreed, 24% do not know. 23% believed that insects and mosquitoes can help in transmitting the Ebola Virus Disease (EVD), while 30% were completely ignorant. We noticed that ignorance was a major limiting factor among some participants. Second, a test was conducted among 45 people. Results from a comprehensive testing of the Ebinformatics software by allowing users to operate and use the software, revealed that 60% of them were satisfied, while 16% were not satisfied with the software, while 24% were indifferent. 69% of the users were in agreement that Ebinformatics was supportive, 20% disagreed, while 11% were indifferent. 67% found the software easy to use, 13% disagreed, while 20% were indifferent. Third, the output of the software, showing the various diagnosis and recommendations interfaces were presented. Recommendations were also given with respect to how the system can be extended, and further improved upon. © 2016
Singh J.,Ahmadu Bello University |
Kalantonis V.S.,University of Patras |
Gyegwe J.M.,Federal University, Lokoja |
Perdiou A.E.,University of Patras
Astrophysical Journal, Supplement Series | Year: 2016
We consider a modification of the restricted three-body problem where the primary (more massive body) is a triaxial rigid body and the secondary (less massive body) is an oblate spheroid and study periodic motions around the collinear equilibrium points. The locations of these points are first determined for 10 combinations of the parameters of the problem. In all 10 cases, the collinear equilibrium points are found to be unstable, as in the classical problem, and the Lyapunov periodic orbits around them have been computed accurately by applying known corrector-predictor algorithms. An extensive study on the families of three-dimensional periodic orbits emanating from these points has also been done. To find suitable starting points, for all the computed families, semianalytical solutions have been obtained, for both two- and three-dimensional cases, around the collinear equilibrium points using the Lindstedt-Poincaré method. Finally, the stability of all computed periodic orbits has been studied. © 2016. The American Astronomical Society. All rights reserved.
Adang K.L.,Federal University, Lokoja |
Asher R.,Gombe State University |
Abba R.,Gombe State University
Asian Journal of Poultry Science | Year: 2014
A study was conducted to determine the prevalence of gastro-intestinal helminths in domestic chickens and ducks slaughtered at the Gombe main market, Gombe State, Nigeria. Faecal samples from 150 chickens and 150 ducks, comprising of 75 male and 75 female samples of each host species, were collected from the dressing unit of the market and examined in the laboratory for helminths, using the intestinal scrapping method. The overall prevalence of helminths was 81.0% in chickens and 4.7% in ducks. More infections with cestodeswere recorded in both host species. The helminths identified from chickens comprised Railleitina tetragona 52 (34.7%), R. cesticillus 32 (21.3%), R. echinobothrida 38 (25.3%), R.magninumida 5 (3.3%), Amoebotaenia cuneata 6(4.0%), Hymenolepis carioca 18 (12.0%) and Ascaridia galli 16 (10.7%), while helminths identified from ducks comprised R. cesticullus 4(2.7%), R. magninumida 5(3.3%), Hymenolepis carioca 2 (1.3%) and Ascaridia galli 1 (0.7%). The males of both host species 67 (89.3%) and 4(5.3%), respectively were more infectedthan the females 55 (73.3%) and 3 (4.0%), respectively. Chi square test revealed no significant difference (p>0.05) in the infection rates between the sexes. Eighty (53.3%) of the chickens had single infections, 38 (25.3%) had double infections and 4 (2.7%) had triple infections while in ducks, 3 (2.0%) had single infections, 3 (2.0%) had double infections and 1 (0.7%) had triple infection. The study revealed that helminths are common parasites of chickens and ducks in Gombe and could be an impediment to their production in the area. © Academic journals Inc.
Adang K.L.,Federal University, Lokoja |
Ayuba J.,Gombe State University |
Yoriyo K.P.,Gombe State University
Pakistan Journal of Biological Sciences | Year: 2015
A study was conducted in order to determine the prevalence of ectoparasites of sheep and goats in Gombe between March and June 2011. A total of 312 animals comprising of 155 sheep and 157 goats were examined and using the hand picking and hair brushing methods, ectoparasites present on the animals were collected. Of the 312 animals examined, 30 sheep representing 19.4% and 22 goats representing 14.0% were infested. The ectoparasites identified on sheep were Lice: Damalinia ovis 6 (3.9%), Ticks: Rhipicephalus sp. 5 (3.2%), Amblyomma sp. 9 (5.8%), Boophilus sp. 10 (6.5%) and Fleas: Ctenocephalides felis 8 (5.2%). The ectoparasites identified on goats were Lice: Damalinia ovis 6 (3.8%), Ticks: Rhipicephalus sp. 8 (5.1%), Amblyomma sp. 2 (1.3%), Boophilus sp. 5 (3.2%), Ixodes ricinus 3 (1.9%), Hyalomma sp. 4 (2.5%) and Mites: Sarcoptes scabiei 3 (1.3%). Ectoparasite infestations were higher in young animals; 11 (19.6%) in sheep and 15 (22.7%) in goats than in adult animals; 19 (19.2%) in sheep and 7 (7.7%) in goats. Female animals of 21 (24.1%) sheep and 17 (22.4%) goats were more infested than male animals of 9 (13.2%) sheep and 5 (6.2%) goats. Single infestations recorded in 22 (14.2%) sheep and 13 (8.3%) goats were higher than double infestations recorded in 8 (5.2%) sheep and 9 (5.7%) goats. The highest mean ectoparasite burden was 14.0±1.2 per host and the lowest mean ectoparasite burden was 1.6±1.9 per host in both sheep and goats. Chi square test revealed no statistically significant differences in the prevalence of ectoparasite infestations between sheep and goats, in age of sheep and goats, in sex and age of sheep, in single and double infestations of sheep and goats (p>0.05) but revealed statistically significant differences in sex of sheep and goats, in sex and age of goats (p<0.05). The study concludes that ectoparasites are common to both sheep and goats in Gombe and could affect their health and productivity as well as their economic and market value. © 2015 Asian Network for Scientific Information.
Musa O.K.,Federal University, Lokoja |
Kurowska E.E.A.,University of Silesia |
Schoeneich K.,Ahmadu Bello University |
Alagbe S.A.,Ahmadu Bello University
Environmental Earth Sciences | Year: 2015
Mud volcanoes grouped into 14 fields are found in southern Gombe, part of the Cretaceous Upper Benue Trough filled with Early Cretaceous continental deposits and Late Cretaceous marine deposits, having a history of magmatism dating from Albian to Pleistocene. They are mostly of small sizes, having cones not exceeding one and half metres in height and diameters ranging from 0.5 to 8 m at base, as well as pools with muddy water and mudflows were encountered. Results of the study show that the cationic and anionic concentration varies as follows: Ca2+ (8.26–46.4 mg/l), Mg2+ (1.16–20 mg/l), Na+(18.6–4789 mg/l), K+ (9.4–134 mg/l), Fe (0.02–5.74 mg/l), HC3 − (126–3111 mg/l), Cl– (5–2625 mg/l), SO4 2– (12.5–16.9 mg/l), CO3 2– (3–2040 mg/l) and SiO2 (7–45.6 mg/l). The study also reveals that the water issuing from the mud volcanoes, in most cases, is highly alkaline (pH ranges from 7.94 to 8.99), saline (TDS varies from 140 to 1620 mg/l), very hard (TH varies from 102 to 1180 mg/l) and belongs to five hydrochemical facies, namely: Na–HCO3, Na–HCO3–Cl, Na–Ca–HCO3, Na–Cl–CO3–HCO3 and Ca–Na–HCO3. The dominant hydrochemical facies is Na–HCO3 while Ca–Na–HCO3 is the minor water type. Statistical correlation reveals positive correlation between most of the parameters. With the exception of Ca2+, Mg2+ and SO4 2−, all other parameters are far above the World Health Organisation standards for drinking water. These waters are mineralised and are not considered to be suitable for drinking and domestic purposes, but may be considered for therapeutic purposes. © 2015, Springer-Verlag Berlin Heidelberg.
Ahwinahwi U.S.,Delta State University, Abraka |
Ahwinahwi U.S.,Federal University, Lokoja |
Chukwudi K.,Delta State University, Abraka |
Chukwudi K.,Federal University, Lokoja
Journal of Applied Pharmaceutical Science | Year: 2016
Objectives: This study was designed to evaluate the Perception and Use of Complementary and Alternative Medicines (CAM) among the undergraduate Students of Delta State University (DELSU), Abraka.-Nigeria. Methods: Self- administered questionnaires were distributed randomly to the participants. Result: Out of 450 students that voluntarily participated in the study, 368 (81.78%) had used or were currently using at least one of the various CAM modalities; Family members (282, 37.15%) appeared to be the most common source of information and knowledge about CAM while Herbal medicine (250, 37.71%) was the most commonly used and perceived to be the most effective CAM method, and the most popular ailment effectively treated with CAM was Malaria (142, 34.22%). Pharmacists (98, 45.80%) played a major role in influencing their perceptions towards CAM use and the major reason for CAM use was that CAM is Cheaper (159, 27.09%) than Conventional medicine, however, lack of scientific evidence to support CAM practices (340, 31.66%) was obtained as the most prevailing barrier to CAM use. Conclusion: Majority of undergraduate Students of DELSU used CAM and possessed positive perceptions of Complementary and Alternative medicine. Concerted efforts should therefore be made by members of the healthcare team to ensure the safety of these modalities. © 2016 Ufuoma Shalom Ahwinahwi and Kingsley Chukwudi.
Adam S.U.,Federal University, Lokoja |
Shamsudin M.N.,University Putra Malaysia |
Sidique S.F.,University Putra Malaysia |
Rahim K.A.,University Putra Malaysia |
Radam A.,University Putra Malaysia
Resources, Conservation and Recycling | Year: 2015
Pollution concern has been established as an important predictor of economic value ascription related to solid waste service improvement, such as recycling. However, the variable is not directly observable and as such, its influence is captured by existing applied economics papers via "yes" or "no" discrete-nominal measure. Such measure assumes the variable has one dimension. This leads to loss of information, considering its multi-dimensional structure in theory. It thus implies that, if a respondent in an economic valuation study indicates a support for an improvement signified by a "yes" response to valuation question, a uni-dimensional dummy variable cannot tell what dimension of concern the respondent subscribes to. Despite this importance of understanding the variable's dimension, it has rarely been explored. This study investigates such dimensions and our findings support the existence of both the theoretically espoused dual and tripartite factor models. This implies a possible misspecification in existing solid waste related studies that have most often captured the variables via uni-dimensional nominal-discrete measure. © 2015 Published by Elsevier B.V.
Toyin A.,Federal University, Lokoja |
Adekeye O.A.,University Of Ilorin |
Bale R.B.,University Of Ilorin |
Sanni Z.J.,Federal University, Lokoja |
Jimoh O.A.,Federal University, Lokoja
Journal of African Earth Sciences | Year: 2016
The basal unit of the succession in the Illela borehole belongs to the Dange Formation comprising thick calcareous and variably coloured dark-greyish shale of 36.30 m thick which is overlain by a 31.44 m thick limestone of Kalambaina Formation with 1.7 m thick shaly-limestone inclusive. The uppermost part of the section belongs to the Gwandu Formation which has intercalation of silty-clay, muddy siltstones with well lithified ironstone capping the borehole section. The limestone/carbonate microfacie as deduced from their salient lithologic, sedimentologic and paleontologic features are comparable to standard microfacie (SMF) types 9 and 10, i.e. bioclastic wackestone/bioclastic micrite and packstone-wackestone respectively. Diagenetically, syndepositional and early diagenesis have taken place particularly cementation and replacement in the carbonate rocks and these have greatly affected the reservoir potential negatively. The matrix/grain relationships indicate a shallow marine environment of deposition. The borehole section is delineated into upper foraminifera and lower ostracod biostratigraphic units as no formal biostratigraphic zonation could be attempted due to low diversity of both benthic foraminifera, marine ostracods and the absence of planktonic foraminifera. The similarity of the ostracod assemblages between this study area, Illela borehole, West Africa, North Africa (Libya), Mali and Niger Republic) and South-Western Nigeria (West Africa) suggests that a marine connection exists between the Gulf of Guinea and the Sokoto Basin via the area occupied by the River Niger during the Paleocene. © 2016 Elsevier Ltd
Ekpenyong M.,University of Uyo |
Isabona J.,Federal University, Lokoja |
Isong E.,Akwa Ibom State University
Proceedings - 2015 International Conference on Computational Science and Computational Intelligence, CSCI 2015 | Year: 2015
A neural network (NN) approach is proposed in this paper to optimize the operation of cellular networks. First, we derive an analytical equation to establish the effect of essential handoff contributory factors. Data of these factors were then obtained from base stations of an operational network carrier, and trained on a backpropagation NN algorithm. Results obtained revealed that the network performance improved with big data and increase in number of neurons for SINR data, but, increasing the number of layers degraded the system performance. However, with relative signal strength data, improved performance was achieved for big data and increase in number of layers for normalized and un-normalized data. Finally, self organizing map was explored to visualize the existing system for the purpose of improving further, its performance. © 2015 IEEE.