Faculty of Natural Sciences

Permanent URI for this communityhttps://irepos.unijos.edu.ng/handle/123456789/11176

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Start date: 2010Has files: Yes

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    Efficient implementation of Some Block Extended Trapezoidal rule of first kind (ETRs) class of method Applied to First Order Initial Value Problems of Differential Equations
    (Global Journal of Mathematics, 2016) E.J.D. Garba2., M.G. Kumleng2 and Tsaku, N3.
    The numerical solution of first order ordinary differential equations is here approached by approximating a class of ,3k 5k and 7k step block extended trapezoidal rule of first kind respectively. The stability properties of the method discussed. Some numerical test, reported to show efficiency and accuracy of our newly developed method.
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    Noisiness and Perceived Noise Levels in Some Food Processing Industries in Jos
    (Advances in Physics Theories and Applications, 2013) Domtau, D.L1. Chagok, N.M.D. 2*, Gyang, B.N. 3, and Mado, S.D.
    Measurement of noise sound pressure levels in food processing industries, a social survey to determine the extent to which the workers were disturbed by the noise in the same industries, in Jos, were carried out. In all the industries, only one had equivalent continuous noise level below 85dBA. The results of the physical measurements showed that the noise was predominantly broad-band, continuous and steady state. Noisiness and perceived noise levels were obtained from the results of the physical measurements. The result showed that perceived noise levels were not more than 2dB higher than their corresponding equivalent continuous noise levels implying that the human ear perceives noise (2 dB maximally) higher than that measured by a sound level meter on A-weighting scale. For noise levels at 90dB and above small increase would result to higher noisiness increase. However, noise level and perceived noise level have continuous and steady dependence at all values. The correlation coefficient for noise rating and perceived noise level ϒ1=0.8599, and the correlation coefficient for noise annoyance and perceived noise levels ϒ1=0.8892, both showing strong positive correlations between objective and subjective assessment of noise.
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    Preliminary Report on HIV-1 Vaccine Preparedness in Nigeria: Advantages of Recruiting University Students
    (viruses, 2010) Abigail Edubio 1,†, Simon Agwale 1,‡, Marc Bulterys 2,§, Dadik Jelpe 3,||, John Idoko 4,¶, Chris Isichei 5, Ruth Guyit 6 and Alash’le Abimiku 7,*
    The national HIV seroprevalence in Nigeria has risen steeply from about 3% in 1993 to 5-8% in 2001 and now stands at 4.4%. HIV epidemic continues to be a serious threat to the most populous country in Africa with a population of 140 million, with limited use of antiviral drugs that is taken for life since it only suppresses the virus without completely eliminating the virus or leading to cure. Only a change in social behavior and an affordable vaccine can halt the epidemic in Africa. We report here results of a pilot study on the recruitment strategies, sociodemographic aspects and HIV risk behavior of a cohort of normal volunteers recruited at the University of Jos, Nigeria. Our study recorded a high degree of interest and zeal to participate in HIV vaccine studies by volunteers, and demonstrated the superiority of snowballing over invitation by mail, as a recruitment strategy. A cohort of university students may be particularly suitable for conducting HIV vaccine trials because of the assurance of prospective follow-up for up to four years (time to graduation), and a good understanding of the risks and benefits of participation as outlined in the informed consent. We had 100% retention during a follow-up period of two years. Most importantly, the cohort reflected a relatively low HIV seroprevalence, which gives preventive programs the potential to blunt or halt the epidemic.
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    State of the Art in Biometric Key Binding and Key Generation Schemes
    (International Journal of Communication Networks and Information Security, 2017-12) Abayomi Jegede1,2, Nur Izura Udzir1, Azizol Abdullah1, Ramlan Mahmod
    Direct storage of biometric templates in databases exposes the authentication system and legitimate users to numerous security and privacy challenges. Biometric cryptosystems or template protection schemes are used to overcome the security and privacy challenges associated with the use of biometrics as a means of authentication. This paper presents a review of previous works in biometric key binding and key generation schemes. The review focuses on key binding techniques such as biometric encryption, fuzzy commitment scheme, fuzzy vault and shielding function. Two categories of key generation schemes considered are private template and quantization schemes. The paper also discusses the modes of operations, strengths and weaknesses of various kinds of key-based template protection schemes. The goal is to provide the reader with a clear understanding of the current and emerging trends in key-based biometric cryptosystems.
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    A Virtual-Community-Centric Architecture to Support Coordination in a Large Scale Distributed Environment: A Case Study of the South African Public Sector
    (International Journal of Innovative Science, Engineering & Technology,, 2018-07) Godwin A. Thomas1, Reinhardt A. Botha2 and Darrell van Greunen 3
    Coordination in a distributed environment is customarily a difficult endeavour. The work pattern that emerges owing to the complexities associated with size, autonomy, structure and geographical dispersal of the participants provides unique coordination challenges, as evidenced in the South African Public Sector. To take advantage of opportunities and maximise the utilisation of limited resources, entities are required to periodically collaborate. This denotes that the need for effective coordination and cooperative collaboration among role players is crucial, to ensure that the ineffective use of resources does not occur, through incoherence, fragmentation and the duplication of efforts. This paper presents an overview of Virtual community-centric architecture that has the potential to support and promote sustainable coordination within the South African public sector. The architecture looks to support the operations of a context aware collaboration life cycle model geared to streamline coordination in a distributed environment from a collaborative stand point.
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    A SURVEY OF ORNAMENTAL PLANTS IN BAUCHI ROAD CAMPUS, UNIVERSITY OF JOS, NIGERIA.
    (Scientia Africana, 2011-06) Ochekwu, E.B, Nwadiaro, P.O, Mark, N and Yabrade, M.
    The survey of ornamental plant on the Bauchi road campus of the University of Jos was conducted. The research was carefully carried out on the field, and the various plants species were assessed thereafter, samples were collected and taken to international institute of tropical agriculture (IITA), herbarium for proper identification. Twenty three (23) ornamental plants, belonging to seventeen (17) families were identified in the course of this study. The family Liliaceae was most dominant and evenly distributed on the campus, while the family Piperaceae was list dominant. The ornamental plants identified are exotic species, while a few of the plants are native of Jos metropolis. Although, the basic reasons for the cultivation of ornamental plants on the campus is for beautification these species were observed to play other important roles such as spot of recreation and relaxation, as wind break and for research purpose.
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    Radioactivity in Some Food Crops from High Background Radiation Area on the Jos –Plateau, Nigeria
    (Journal of Natural Sciences Research, 2012) D.I.Jwanbot1*, M.M. Izam2 and G.G. Nyam
    The activity Concentration of 40K, 226Ra and 228Th were determined in the food crops on the Jos Plateau using γ-ray spectrometry. The activity concentration of the natural radionuclide in the food crops lied between 12.36 ± 0.82 and 56.92 ± 8.84Bq/Kg for 40K,(1.46 ± 0.05 to 10.42 ± 0.04) Bq/Kg for 226Ra and from (1.53 ± 0.08 to 6.85 ± 0.42) Bq/Kg for 228Th. These relativity high values for the activity concentrations maybe attributed to the series of tin mining activities that have taken place in these areas in the past decades. However, the values obtained suggest that the dose taken from intake of these radionuclides in the food crops is low and that harmful effects are not expected.
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    PREVALENCE AND IMMUNE STATUS OF HIV/HBV COINFECTED PREGNANT WOMEN
    (AFRICAN JOURNAL OF CLINICAL AND EXPERIMENTAL MICROBIOLOGY, 2013) Lar, 1P. M.,, Pam, 1V. K., Christopher, 1P. B., 2 Gwamzhi, L. & Mawak, 1 J. D.
    HIV/HBV coinfection places patients at high risk of liverrelated morbidity and mortality and the interaction of the two viruses can further complicate treatment. Pregnant women are especially at high risk for increased morbidity and mortality due to infection, and information about HIV/HBV coinfection in pregnant women is scanty. This study examined the occurrence of HBV antibodies in HIV1 positive pregnant women and the relationship to Anteretroviral therapy (ART) and other demographic characteristics. Blood samples were collected from 135 HIV pregnant positive women who were either on ART or Not, from May – June, 2008 at the Jos University Teaching Hospital (JUTH) and the Plateau State Specialist Hospital (PSSH). Presence of hepatitis B surface (HBsAg) antigen in serum was determined using Antec strips (Antec diagnostics UK) and their immunologic status were determined by measuring the CD4+ counts using SL_3 cyFlow counter (Partec, Germany) . Sixteen 16 (11.8%) of the women examined were seropositive for Hepatitis B virus. Occupation was significantly associated with the prevalence of the hepatitis coinfection in the population examined (8.8% of house wives and 5.5% of business women had coinfection, p<0.05). The immunologic status (CD4+ of most of the HIV/HBV coinfected pregnant women (81.5%) was low (below 300 cells/mm3) although all were on Anti retroviral therapy. The 11.8% prevalence rate reported in this study confirms the endemicity of HBV /HIV coinfection in Nigeria, and this supports the calls for screening for Hepatitis B as a routine in antenatal care.
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    The Increasing Cases of Lower Back Pain in Developed Nations: A Reciprocal Effect of Development
    (Academic Journal of Interdisciplinary Studies, 2014-07) 1M.Y. Mafuyai 2B. G. Babangida 3E.S. Mador 4D.D. Bakwa 5Y.Y. Jabil
    Lower back pain is a nonspecific health problem but a general complaint among people of all ages with severe effect and complain among the middle aged and the old. And, surprisingly, the complaint is more rampant in the developed nations than in the developing and underdeveloped nations of the world. The cause has generally been accepted by most researchers around the world to be mechanical than infectious. Our previous research indicated that some postures of the lumbar spine (lower back) are more susceptible to injury and can easily cause pain in the lumbar spine than others. This work has shown that this posture is common among the people in the developed nations due to he highly developed facets of life. The research therefore suggest that the rampant complaint is the result of this posture of the lumbar spine.
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    Evaluation of the Essential Oils Constituents from the Leaves, Seed Buds and Fruits of Eucalyptus torelliana F. Muel Plant by Gas Chromatography-Mass Spectral Analysis
    (IOSR Journal of Applied Chemistry (IOSR-JAC), 2016-10) Dashak, D. A.1, Daben, J. M.2, Olaoye, F.M.1, Agunbiade1, A.T, Ogbole, E
    Essential oils obtained from the leaves, seed buds and fruits of Eucalyptus torelliana F. Muel plant by hydro-distillation technique were evaluated using Gas Chromatography-Mass Spectrometry method. The major components of all the essential oils from the Gas Chromatography-Mass Spectral analysis are: 4-hexen2-one, phenol, 7-Azabicyclo[4.1.0] heptane, 2-isopropyl phenol, 2,5-dimethyl-3-methylene-1,5-Hexadiene, 1,8nonadiyn, 1-phenylmethanol, n-Hexanol, 2-phenylethanol, Methyl propanoate and haptanitrile. The presences of these compounds suggest potentials of the leaves, seed buds and fruits of Eucalyptus torelliana plant for possible uses as antiseptics, disinfectants and food additives