Dutse, Nigeria

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Miyim A.M.,Federal University, Dutse | Ismail M.,Federal University, Dutse | Nordin R.,National University of Malaysia
2016 International Conference on Advances in Electrical, Electronic and Systems Engineering, ICAEES 2016 | Year: 2017

The exciting moments for cellular networks is the currently on-going deployment of fourth generation (4G) networks offering services to customers worldwide. The key asset for users and operators alike is the support 5G networks continue to receive towards improved communication systems. This paper addresses issues of integrated resource scheduling within cellular networks and proposing an improvement of the proportional fairness algorithm (NIPFA) to examine the upcoming 5G networks. The impact of heterogeneity in cellular networks is being evaluated in a scenario combining macro and micro-coverage. Findings show how the versatility of heterogeneous networks help macrocells retain an edge for general-purpose downloading, while microcell produce an appealing solution for viral content. © 2016 IEEE.


Gumel A.M.,Federal University, Dutse | Gumel A.M.,University of Malaya | Annuar M.S.M.,University of Malaya
3 Biotech | Year: 2016

Enzymatic catalysis is considered to be among the most environmental friendly processes for the synthesis of fine chemicals. In this study, lipase from Thermomyces lanuginosus (Lecitase Ultra™) was used to catalyze the synthesis of flavor esters, i.e., methyl butanoate and methyl benzoate by esterification of the acids with methanol in a microfluidic system. Maximum reaction rates of 195 and 115 mM min−1 corresponding to catalytic efficiencies (kcat/KM) of 0.30 and 0.24 min−1 mM−1 as well as yield conversion of 54 and 41 % were observed in methyl butanoate and methyl benzoate synthesis, respectively. Catalytic turnover (kcat) was higher for methyl butanoate synthesis. Rate of synthesis and yield decreased with increasing flow rates. For both esters, increase in microfluidic flow rate resulted in increased advective transport over molecular diffusion and reaction rate, thus lower conversion. In microfluidic synthesis using T. lanuginosus lipase, the following reaction conditions were 40 °C, flow rate 0.1 mL min−1, and 123 U g−1 enzyme loading found to be the optimum operating limits. The work demonstrated the application of enzyme(s) in a microreactor system for the synthesis of industrially important esters. © 2016, The Author(s).


Taura L.S.,Bayero University | Ndikilar C.E.,Federal University, Dutse
African Review of Physics | Year: 2017

The estimation of global solar radiation at Nguru, latitude12°53'N, 10°28'E was carried out. The data was obtained from Nigeria Meteorological Agency (NIMET) for a period of five years (2004-2008).The minimum temperature, maximum temperature and relative humidity data within the Sudan savannah climatic zone of northern Nigeria were used to compute the correlation coefficients (a&b) of correlation equations as -0.143+1.183 (Tmin/Tmax) and 0.563-0.003( RH)for estimation of global solar radiation using ratio of minimum temperature to maximum temperature and relative humidity respectively, with the values of 26.02MJday-1and 25.85 MJday-1, as the peak values of the global solar radiation (H), corresponding to the months of April and October respectively in the station and hence its derivatives were also derived.


Inc M.,Firat University | Aliyu A.I.,Federal University, Dutse | Yusuf A.,Federal University, Dutse
Journal of Modern Optics | Year: 2017

In this work, we investigate the optical solitons to the non-linear Shrödinger’s equation with spatio-temporal dispersion. There are two types of non-linear media studied in this paper. They are Kerr law and parabolic law. By adopting a complex amplitude ansatz method composed of the addition of bright and dark optical solitons, we present the exact dark, bright and dark-bright or combined optical solitons to the model. Numerical results and discussions are also presented. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Njinga R.L.,North West University South Africa | Njinga R.L.,Federal University, Dutse | Tshivhase V.M.,North West University South Africa
Mine Water and the Environment | Year: 2017

The gross alpha and beta activity in treated water from one of the numerous gold mines in Gauteng province averaged 1.15 ± 0.13 and 0.87 ± 0.11 Bq L−1, respectively. The average readings of the fissure water from the same mine were 0.56 ± 0.10 and 0.52 ± 0.11 Bq L−1, respectively. Water samples collected at the foot of the Princess gold mine tailings dump in Gauteng province and from downstream, before the drainage joins other water sources, also had high average gross alpha and beta activity and high average concentrations of radionuclides. The hazard quotient value evaluated, based on 238U of the water sample types in these vicinities, was far above one, indicating that it may pose serious health risks to the inhabitants. © 2017 Springer-Verlag GmbH Germany


Usman S.,Federal University, Dutse | Kundiri A.M.,Federal University, Dutse
International Journal of Soil Science | Year: 2016

The Sub-Saharan Africa needs urgent sustainable crop production for economic development. Poverty and hunger, soil degradation and decline soil quality are increasingly alarming in the region. Soil science is the mainstay of the economic development for the Sub-Saharan African region. Soil science provides support to crop production, raw materials to million industries, water quality for biota, animal and human survival, recycling of abundant dead materials, landscaping for engineering and research purposes, foreign exchange for national income and accommodation for animal and human interactions. This study outlined and discussed these functional services of soil science as an answer to sustainability and renewability of crop production for economic development in Sub-Saharan Africa. © 2016 S. Usman and A.M. Kundiri.


Lawal I.A.,University of South Africa | Abdulkarim S.A.,Federal University, Dutse
South African Computer Journal | Year: 2017

In this paper, we address the problem of learning an adaptive classifier for the classification of continuous streams of data. We present a solution based on incremental extensions of the Support Vector Machine (SVM) learning paradigm that updates an existing SVM whenever new training data are acquired. To ensure that the SVM effectiveness is guaranteed while exploiting the newly gathered data, we introduce an on-line model selection approach in the incremental learning process. We evaluated the proposed method on real world applications including on-line spam email filtering and human action classification from videos. Experimental results show the effectiveness and the potential of the proposed approach. © the author(s).


Inc M.,Firat University | Aliyu A.I.,Firat University | Aliyu A.I.,Federal University, Dutse | Yusuf A.,Firat University | Yusuf A.,Federal University, Dutse
European Physical Journal Plus | Year: 2017

In this paper, the Riccati-Bernoulli sub-ODE method is used to find the soliton solutions of two different fifth-order nonlinear partial differential equations (NPDEs). The efficiency of this method for finding exact and traveling wave solutions has been demonstrated. The solitons appear with all necessary constraint conditions which guarantee their existence. The conservation laws (Cls) for the underlying equations are constructed using the Ibragimov's Cls theorem. The obtained solutions have been demonstrated by some figures. © 2017, Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg.


Inc M.,Firat University | Aliyu A.I.,Firat University | Aliyu A.I.,Federal University, Dutse | Yusuf A.,Firat University | Yusuf A.,Federal University, Dutse
Modern Physics Letters B | Year: 2017

This paper studies the dynamics of solitons to the nonlinear Schrödinger's equation (NLSE) with spatio-temporal dispersion (STD). The integration algorithm that is employed in this paper is the Riccati-Bernoulli sub-ODE method. This leads to dark and singular soliton solutions that are important in the field of optoelectronics and fiber optics. The soliton solutions appear with all necessary constraint conditions that are necessary for them to exist. There are four types of nonlinear media studied in this paper. They are Kerr law, power law, parabolic law and dual law. The conservation laws (Cls) for the Kerr law and parabolic law nonlinear media are constructed using the conservation theorem presented by Ibragimov. © 2017 World Scientific Publishing Company.


Alhassan M.A.,Federal University, Dutse | Jawawi D.N.A.,University of Technology Malaysia
2014 8th Malaysian Software Engineering Conference, MySEC 2014 | Year: 2014

Effective measurement for successful Statistical Process Control (SPC) implementations across any level of Capability Maturity Model (CMM) is not a very straightforward activity. Based on CMM standard, SPC is only applicable to its higher maturity levels so as to tackle quantitative process management issues like out-of-control process and to point out further areas of process improvements. This study reveals that; SPC can be used at CMM level 2 to repeatedly control process but with some difficulties. The difficulty of accurate process measurement for successful SPC implementation is addressed by proposing a Sequential Strategy for Process Measurement (SSPM). This strategy can support software organization's process measurement activities for process control and management. © 2014 IEEE.

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