Lafia, Nigeria

Time filter

Source Type

Jimoh O.A.,Universiti Sains Malaysia | Ariffin K.S.,Universiti Sains Malaysia | Hussin H.B.,Universiti Sains Malaysia | Temitope A.E.,Federal University, Lafia
Carbonates and Evaporites | Year: 2017

The current high global demand for high-quality paper, paint, adhesive/sealant, and plastic, filler industries cannot survive without unique and high-quality precipitated calcium carbonate (PCC). They are used as fillers, additives, and reinforcements. PCC is a key constituent of the modern paper and plastic industry. This article reports the effect of various organic and inorganic additives used in the synthesis of the different polymorph of calcium carbonate. The use of precipitated calcium carbonate fillers is the recommended choice in enhancing optical properties, durability, smoothness and ink adsorption in papermaking and improving the mechanical properties of plastic. PCC can best be synthesized using solid–liquid route or the gas–solid–liquid carbonation route, which consists of bubbling gaseous CO2 through a concentrated calcium hydroxide (Ca(OH)2) and/or calcium magnesium hydroxide (Ca·Mg(OH)2) slurry with suitable organic additives. The use of several organic and synthetic additives in conjunction with different reaction parameters for the synthesis of the various polymorph of precipitated calcium carbonate is reported. Depending on the desired end use, PCC polymorphs such as aragonite, vaterite and calcite are vital in the plastic and rubber industries. © 2017 Springer-Verlag GmbH Germany

PubMed | Federal University, Lafia, Natural History Museum in London and National Institute of Parasitic Diseases
Type: | Journal: Parasites & vectors | Year: 2016

Oncomelania hupensis is the unique intermediate host of Schistosoma japonicum, which plays a crucial role in the transmission of schistosomiasis. The endemic area of S. japonicum is strictly consistent with the geographical distribution of O. hupensis.A total of 24 populations of O. hupensis from four ecological landscapes were selected for analysis of genetic diversity by screening eight microsatellite DNA polymorphic loci.The number of alleles per locus ranged from 29 to 70 with an average of 45.625 and that of effective alleles were 18.5 to 45.8 with an average of 27.4. The observed (Ho) and expected (He) heterozygosities varied from 0.331 to 0.57 and from 0.888 to 0.974, respectively. The mean of polymorphism information content (PIC) for all populations was 0.940, appearing polymorphic for all loci. For the fixation index of F-Statistics, Fit and Fst were 54.95 and 37.62%, respectively. Variation of O. hupensis chiefly exists among individuals, accounting for 60.58% of the total variation determined by Analysis of Molecular Variation (AMOVA). Variation among individuals within populations, among populations within groups and among groups only accounted for 26.60, 8.04 and 4.78%, respectively. This distribution of variation suggests that genetic differences principally originate from within-populations rather than among-populations. Moreover, UPGMA cluster analysis showed that the populations spreading within middle and lower reaches of the Yangtze River (HBWH, JSYZ, JXNC, HNHS, JXJJ, AHWW, HBJL, JXDC, HNNX, JSYZJZ, ZJJH, AHNG and AHWJ) clustered together first, then gathered with the populations in the high mountains (SCMS, SCYA, SCPJ, YNEY, SCLS, YNWS and SCXC), coastal hills (FJFQ and FJFZ) and Karst landform (GXBS and GXYZ) successively.This study provides novel insight into the theoretical source of genetic differentiation of Oncomelania hupensis in mainland China, which is critical for the epidemiological investigation and surveillance of S. japonicum.

Okewu E.,University of Lagos | Okewu J.,Federal University, Lafia
Proceedings of the European Conference on e-Government, ECEG | Year: 2015

This paper presents figures to significantly gauge insecurity levels in Sub-Saharan Africa. A topic of growing debate globally is insecurity. And Sub-Saharan Africa has its fair share, ranging from the ebola virus disease (EVD), climate change vulnerability, environmental risk, food insecurity to terrorism. Insecurity has reputation for depleting socio-economic activities. The social contract between government and the governed makes it mandatory for any responsible and responsive government to avail its citizens socio-economic transformation. Researchers, practitioners and captains of industry have concurred that tackling insecurity requires a multi-prong approach spanning political, economic, technological and military solutions. Though the mechanics of insecurity may seem the same across climes, the same cannot be said of the ideology. Studies have shown that insecurity in Africa is hinged on poverty and ignorance. Using secondary data and modelling, this study applies Information and Communications Technologies (ICTs) in combating poverty and ignorance in Sub-Saharan Africa through e-Education, e-Health, e-Agriculture and e-Social Security. The research study provides empirical data for substantiating poverty-driven insecurity. It also outlines guidelines for designing and implementing ICTs policies, programmes and projects for sustained and sustainable development within the framework of Africa's economic status quo. The expectation is that these measures will engender social transformation and security. © The Authors, 2015.

Okewu E.,University of Lagos | Okewu J.,Federal University, Lafia
Proceedings of the European Conference on e-Government, ECEG | Year: 2015

There are growing concerns among development experts and researchers about Africa's transition from agrarian economy to industrial economy. They argue that the continent's ambition of being the new economic frontier and preferred destination for foreign direct investment is being threatened by faulty leadership predicated on corruption. In any case, this corruption postulation needs to be grounded in scientific evidence and data. What is clear in the literature is that investors, foreign or local, are not likely to play in an atmosphere of uncertainty. Among other variables, a stable democratic setting is a sine qua non for investment inflows. Apparently, democracy remains the best form of government as it guarantees inclusivity of the leaders and the led in the governance process. In recent memory, Information and Communication Technologies (ICTs) have been reshaping political development and democratization globally. And Africa has its slice of the pie. ICTs as a knowledge tool empowers the led with information about governance procedures for them to in turn hold their leaders accountable for actions and inactions with a view to reducing corruption-induced social tensions. Focusing on Nigeria as case study, this paper measures corruption using statistical model and discusses e-government, e-governance and e- Administration as a typology of managing corruption using ICTs. The expected research outcome is an information system blueprint for a democratic structure that promotes developmental politics and attracts foreign direct investments. This way, Africa's dream of being the next preferred global investment destination will scale up to reality. © The Authors, 2015.

Within the framework of restricted four-body problem, we study the motion of an infinitesimal mass by assuming that the primaries of the system are radiating-oblate spheroids surrounded by a circular cluster of material points. In our model, we assume that the two masses of the primaries m2 and m3 are equal to μ and the mass m1 is 1−2μ. By using numerical approach, we have obtained the equilibrium points and examined their linear stability. The effect of potential created by the circular cluster and oblateness coefficients for the more massive primary and the less massive primary, on the existence and linear stability of the libration point have been critically examine via numerical computation. The stability of these points examined shows that the collinear and the non-collinear equilibrium points are unstable. The result presented in this paper have practical application in astrophysics. © 2014, Springer-Verlag Wien.

Ikhdair S.M.,Bank of The West | Falaye B.J.,Federal University, Lafia | Hamzavi M.,University of Zanjan
Annals of Physics | Year: 2015

By using the wave function ansatz method, we study the energy eigenvalues and wave function for any arbitrary m-state in two-dimensional Schrödinger wave equation with various power interaction potentials in constant magnetic and Aharonov-Bohm (AB) flux fields perpendicular to the plane where the interacting particles are confined. We calculate the energy levels of some diatomic molecules in the presence and absence of external magnetic and AB flux fields using different potential models. We found that the effect of the Aharonov-Bohm field is much as it creates a wider shift for m≠. 0 and its influence on m=. 0 states is found to be greater than that of the magnetic field. To show the accuracy of the present model, a comparison is made with those ones obtained in the absence of external fields. An extension to 3-dimensional quantum system have also been presented. © 2014 Elsevier Inc.

Ezugwu A.E.,Federal University, Lafia | Frincu M.E.,University of Southern California | Junaidu S.B.,Ahmadu Bello University
IEEE International Conference on Adaptive Science and Technology, ICAST | Year: 2015

While distributed computing systems which generally involve the aggregation of geographically distributed heterogeneous resources can in principle be used as computing platform, in practice, the discovery and selection of quality resources that satisfy user's application requirements remain an issue that is difficult to address. In this paper, we represent the performance of a computational cluster as a regression model that can be used to fine-tune the selection of suitable cluster resources. A study on the performance of distributed systems with respect to particular variations in parameters is presented. Our objective is to use a measurement-based evaluation technique to characterize the specific performance contribution of the individual cluster resource configurations. In the process we identify the key primary parameters (or factors) that should be considered when selecting and allocating a computational node for user application execution. © 2014 IEEE.

Falaye B.J.,Federal University, Lafia | Ikhdair S.M.,Bank of The West | Hamzavi M.,University of Zanjan
Few-Body Systems | Year: 2014

We present a simple formula for finding bound state solution of any quantum wave equation which can be simplified to the form of (Formula Presented.). The two cases where k3 = 0 and (Formula Presented.) are studied. We derive an expression for the energy spectrum and the wave function in terms of generalized hypergeometric functions (Formula Presented.). In order to show the accuracy of this proposed formula, we resort to obtaining bound state solutions for some existing eigenvalue problems in a rather more simplified way. This method has shown to be accurate, efficient, reliable and very easy to use particularly when applied to vast number of quantum potential models. © 2014, Springer-Verlag Wien.

Falaye B.J.,Federal University, Lafia | Ikhdair S.M.,Near East University | Hamzavi M.,University of Zanjan
Journal of Mathematical Chemistry | Year: 2015

Spectroscopic techniques are very essential tools in studying electronic structures, spectroscopic constants and energetic properties of diatomic molecules. These techniques are also required for parametrization of new method based on theoretical analysis and computational calculations. In this research, we apply the proper quantization rule in spectroscopic study of some diatomic molecules by solving the Schrödinger equation with two solvable quantum molecular potentials; Tietz-Wei and shifted Deng-Fan potential models for their approximate nonrelativistic energy states via an appropriate approximation to the centrifugal term. We show that the energy levels can be determined from its ground state energy. The beauty and simplicity of the method applied in this study is that, it can be applied to any exactly as well as approximately solvable models. The validity and accuracy of the method is tested with previous techniques via numerical computation for $$\hbox {H}_2$$H2 and CO diatomic molecules. Our result also include energy spectrum of five different electronic states of NO and two different electronic state of ICl. © 2015, Springer International Publishing Switzerland.

Falaye B.J.,Federal University, Lafia | Oyewumi K.J.,University Of Ilorin | Ikhdair S.M.,Bank of The West | Hamzavi M.,University of Zanjan
Physica Scripta | Year: 2014

In this study, the approximate analytical solutions of Schrödinger, Klein-Gordon and Dirac equations under the Tietz-Wei (TW) diatomic molecular potential are represented by using an approximation for the centrifugal term. We have applied three types of eigensolution techniques: the functional analysis approach, supersymmetry quantum mechanics and the asymptotic iteration method to solve the Klein-Gordon, Dirac and Schrödinger equations, respectively. The energy eigenvalues and the corresponding eigenfunctions for these three wave equations are obtained, and some numerical results and figures are reported. It has been shown that these techniques yielded exactly the same results. some expectation values of the TW diatomic molecular potential within the framework of the Hellmann-Feynman theorem have been presented. The probability distributions that characterize the quantum mechanical states of TW diatomic molecular potential are analyzed by means of complementary information measures of a probability distribution called Fishers information entropy. This distribution has been described in terms of Jacobi polynomials, whose characteristics are controlled by quantum numbers. © 2014 The Royal Swedish Academy of Sciences.

Loading Federal University, Lafia collaborators
Loading Federal University, Lafia collaborators