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Journal of Geoscience and Environment Protection 2016年第1期4卷 84-92页

作者： abba aliyu kasim Abubakar Aminu Usman Department of Soil Water Land Engineering & Management Sam Higginbottom Institute of Agriculture Technology & Sciences Allahabad India

Soil surface wetness is indispensable land surface parameter in agriculture, hydrology and environmental engineering. This paper explores the relationship between surface radiant temperature and fractional vegetation cover derived from satellite imagery to estimate soil surface wetness (triangle method) in Allahabad district. The pixel distributions create triangular shapes because the range of surface radiant temperature decreases as the amount of vegetation cover increases and sufficient number of pixels exists. A very weak correlation is found between the simulated soil surface wetness and ground measured soil moisture at deeper soil layers (R2 < 0.15) on all the dates under investigation. This is because the drying rates at the surface discontinue to be linearly correlated to that at lower levels (depths). The standing water pixels distort the shape of the triangle especially at lower left edge of the triangle. This distortion is removable. The spatial and temporal inhomogeneity of soil surface wetness is examined.

关键词： Triangle Method Soil Surface Wetness Surface Radiant Temperature Fractional Vegetation Cover

An Approach to Energy Saving and Cost of Energy Reduction Using an Improved Efficient Technology

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Open Journal of Energy Efficiency 2015年第4期4卷 61-68页

作者： Abubakar Kabir aliyu abba Lawan Bukar Jamilu Garba Ringim Abubakar Musa Faculty of Electrical Engineering Centre of Electrical Energy System Johor Bahru Malaysia Department of Electrical Engineering Faculty of Engineering University of Maiduguri Maiduguri Nigeria Federal Airport Authority of Nigeria Katsina Nigeria Department of Electrical Engineering Faculty of Engineering Ahmadu Bello University Zaria Nigeria

The electricity consumption in commercial places like universities has tremendously increased recently. Modern and advanced energy efficient appliances are highly needed to substitute the conventional ones. Energy saving is of great important instead of its wastage, as utilizing the energy efficiently reduces the cost of energy. Energy consumption varies for commercial building due to several factors such as electrical appliance usage, electrical appliance type, management, etc. Due to the advancement in technology, there are new emergence appliances that are of high efficiency and have less energy consumption. A case study is conducted on selected five tutorial rooms, level 4 buildings in the Faculty of Electrical Engineering 19 A, Universiti Teknologi Malaysia. The paper proposes new emergence equipments with high efficiency and less power consumption to replace the existing ones. A survey is conducted on the number of electrical appliances used for each of the tutorial rooms, time table for each tutorial room and the Tenaga Nasional Berhad pricing and tariff are taken into consideration in the analysis of the energy consumption and the cost of energy. This paper aims at reducing the amount of energy consumption by replacing the existing electrical equipments with high efficient electrical equipments;it also tends to reduce the cost of energy paid to the utility. By observing the results, it shows that the proposed efficient electrical equipments are more efficient, less power consumption and less cost compared to the existing electrical equipments.

关键词： Energy Efficiency Payback Period Energy Saving Energy Auditing Energy Efficiency Measures

Estimation of Annual Effective Dose Due to Ingestion of Natural Radionuclides in Cattle in Tin Mining Areas of Jos Plateau, Nigeria: Are Large Mammals Really Affected?

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Natural Science 2015年第4期7卷 190-196页

作者： A. S. aliyu T. A. Mousseau N. N. Garba H. T. abba A. T. Ramli Department of Physics Nasarawa State University Keffi Nigeria Department of Physics Universiti Teknologi Malaysia Johor Malaysia Department of Biological Sciences University of South Carolina Columbia SC USA Department of Physics Ahmadu University Zaria Nigeria Department of Physics Yobe State University Damaturu Damaturu Nigeria

We have read with great interest the paper which was published in Natural Science, 2014 issue number 6 titled “Estimation of annual effective dose due to ingestion of natural radionuclides in cattle in tin mining area of Jos Plateau, Nigeria” [1]. The paper motivated us to use state-of-the-art computational technique to investigate the risks of the tin mining activity in Jos-Plateau, Nigeria on large mammals (e.g. cattle). The Tier 2 Erica Tool assessment was used to estimate the total dose rate and risk quotients of these reference terrestrial animals. Our investigation revealed that the expected and conservative risk quotients of large mammals due to internal and external exposure to enhanced level of radioactivity are 0.05 and 0.16, respectively. Since the risk quotients are less than unity, this indicates that there is less than 5% probability that the screen dose rate (10 μGy•h–1) is exceeded. The estimated total dose rate to large mammals is 0.52 μGy•h–1 which is not statistically significant. A critical analysis of [1] is presented in the introductory part of this paper.

关键词： Tin Mining Radioecology Biota Jos Dose Rate

Mathematical modeling and analysis of schistosomiasis transmission dynamics

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International Journal of Modeling, Simulation, and Scientific Computing 2021年第4期12卷 58-76页

作者： Umar T.Mustapha Salihu S.Musa Muhammad A.Lawan aliyu abba Evren Hincal Musa D.Mohammed Bashir D.Garba Rabiu B.Yunus Shehu A.Adamu Daihai He Department of Mathematics Near East University TRNC Mersin 10 Turkey Department of Mathematics Federal University Dutse Nigeria Department of Applied Mathematics The Hong Kong Polytechnic University Hong Kong Department of Mathematics Kano University of Science and Technology Wudil Nigeria Department of Statistics Jigawa State Polytechnic DutseNigeria Department of Computer Engineering Institute of Continuing Education Kano University of Science and Technology Wudil Nigeria Department of Mathematics and Statistics Kano State Polytechnic Nigeria

Schistosomiasis is a parasitic disease from the family of Schistosomatidae and genus Schistosoma,which is caused by blood *** disease is endemic in many countries and still a serious threat to global public health and *** this paper,a new deterministic model is designed and analyzed qualitatively to explore the dynamics of schistosomiasis transmission in human,cattle and snail *** from our mathematical analysis show that the model has a disease-free equilibrium(DFE)which is locally asymptotically stable(LAS)whenever a particular epidemiological threshold quantity,also known as basic reproduction number(R0)is less than *** analysis shows that the model has a unique endemic equilibrium(EE)which is globally asymptotically stable whenever R0>1 and unstable when R0<***,we adopt partial rank correlation coefficient for sensitivity analysis to reveal the most important parameters for effective control and mitigation of schistosomiasis disease in a ***,we obtain some numerical results by simulating the entire dynamics of the model,which show that the infections in the compartments of each population decrease with respect to *** further indicates that avoiding contact with infected human,cattle or infested water is vital to prevent the spread of schistosomiasis disease infection.

关键词： Schistosomiasis disease basic reproduction number stability analysis sensitivity analysis