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A Neuro-Fussy Based Model for Diagnosis of Monkeypox Diseases
Get PDFThe largest vertebrate viruses known, infecting humans, and other vertebrates are poxviruses including cowpox, vaccinia, variola (smallpox), and monkeypox viruses. Monkeypox was limited to the rain forests of central and western Africa until 2003. A smallpox-like viral infection caused by a virus of zoonotic origin, monkeypox belongs to the genus Orthopoxvirus, family Poxviridae, and sub-family Chordopoxvirinae. Monkeypox has a clinical presentation like ordinary forms of smallpox, including flulike symptoms, fever, malaise, back pain, headache, and characteristic rash. In view of the eradication of smallpox, such symptoms in a monkepox endemic region should be carefully diagnosed. The problem in diagnosing monkeypox lies in the fact that it is clinically indistinguishable from other pox-like illnesses making virus differentiation difficult. In this paper, we present a neuro-fuzzy based model for early diagnosis of monkeypox virus with a differentiation from other pox families
Discourse Pattern, Contexts and Pragmatic Strategies of Selected Fraud Spam
Get PDFThe thrust of this paper is the pragmatic investigation of fraud spam, the unwanted emails containing the
strategic use of language with the intention to swindle money from the recipients. Sixty (60) English medium email samples were collected from the author of the present paper’s email spam between July 2017 and February 2018 in Nigeria. These were analysed using Halliday and Hasan’s Generic Structure Potential and an aspect of Fetzer’s cognitive context model. The study identified six discourse patterns: salutation, discourse initiation, enticing information, mild conscription into business, request and subscription; orienting to contexts of business and religion; manifesting pragmatic strategies of adversatives, evocation of business idea, evocation of religious affinity and evocation of messianic figure. The study, therefore, concludes that cyber-fraudsters deploy similarly familiar patterns and contexts evincing strategic persuasive language to defraud their prospective victims. Significantly, the study complements existing literature on fraud discourse in linguistic scholarship
STRATEGIES FOR THE PRESERVATION OF ELECTRONIC RECORDS IN UNIVERSITY LIBRARY STAFF IN NIGERIA
Get PDFThis study attempts an empirical investigation of strategies for the preservation of electronic records in university libraries in Nigeria. The main objective of this study is to ascertain the strategies used by the University libraries in Nigeria to preserve electronic records. The study employed descriptive research design. The population comprises one hundred and sixty nine (169) librarians from university libraries in Nigeria. Simple random sampling technique was used and the instrument for data collection is semistructured closed and open-ended questionnaire. Data was analysed using descriptive statistics, charts with simple percentages. Statistical Package for Social Science version 22 are used for data analysis. The findings of the study revealed that (= 1.63±SD= 0.660) majority of university libraries in Nigeria do not have in place preservation strategies for electronic information records. 94.1% of librarians do not possess requites skills for preserving electronic information records. Lack of manpower and other infrastructure are identified as the major inhibiting factors (= 3.90±SD= 0.418). The study also found out that there is a significant relationship inhibiting factors of preservation and preservation strategies adopted by university library staff in Nigeria (r=-0.305, N= 169 and P< 0.01)
LIBRARIANS PERCEPTION OF BRING YOUR OWN DEVICE POLICIES: BENEFITS FOR UNIVERSITY LIBRARIES
Get PDFBring Your Own Device (BYOD) is an initiative that permits library staff to use a personally owned device to perform official tasks and access electronic library information. The most frequently used personally owned devices are mobile phones, tablets, iPad and laptops. The practice of encouraging personally owned computing devices within professional organizations is becoming more and more acceptable, as this practice enables the organisation to transfer the investment costs of desktop hardware into their employees (Pillay, 2013).
The university libraries are faced with difficult economic times and university budget cuts (Tenopir & Kaufman, 2010). Hence, BYOD encourages library staff to use their personal devices to carry out official tasks, this will reduce the cost of hardware purchase and maintenance. Despite the fact that university libraries are faced with budget cuts and BYOD has been reported in many organisations as one of the ways to reduce the cost of hardware purchase. It has been observed that university libraries in Nigeria have not yet fully adopt BYOD policies. It is on this background that this study investigates librarians perception of BYOD policies; identify perceived benefits and shortcomings of BYOD to University libraries in Nigeria.
The specific objectives of this study are to find out the knowledge of BYOD among librarians, establish the availability of BYOD policies and perceived benefit of BYOD to the university libraries in Nigeria.
A descriptive survey research design will be adopted for this study and a self-structured questionnaire will be used as the major instrument for data collection. The questionnaire will be distributed to the respondents during the Annual Nigerian Library Association Conference that will be held in July 2018 in Abeokuta, Ogun State Nigeria. The choice of administrating the questionnaire at this venue is due to the fact that this conference draws many participants from all the libraries in Nigeria. The target population of this study comprises all 152 and a simple random sampling technique will be used for sample size. The data collected for this study will be subjected to inferential and descriptive statistical analysis using percentage, frequency count, standard deviations and means. The data will be analyzed using SPSS version 22.Covenant Universit
Sequestration of Aqueous Lead(II) Using Modified and Unmodified Red Onion Skin
Get PDFStaff PublicationThe efficacy of onion skins, both unmodified and chemically modified with thioglycolic acid,
was investigated as alternative low-cost adsorbents for the sequestration of aqueous lead(II) ions
from aqueous solution. The adsorbents were characterised using Fourier transform infrared
spectroscopy and scanning electron microscopy – energy dispersive X-ray spectroscopy.
Adsorption experiments were performed using batch sorption processes. The effects of contact
time, pH, initial Pb(II) concentration, adsorbent dose, and temperature were investigated.
Optimum sorption conditions were found at pH 4 and a 150 min equilibrium time for the
modified onion skin and unmodified onion skin. The Langmuir, Freundlich, DubininRadushkevich and Temkin models were used to characterize the equilibrium experimental
results. The equilibrium process was best described by the Freundlich isotherm. The maximum
adsorption capacities of 4.878 and 6.173 mg/g were obtained for modified and unmodified
adsorbents, respectively, using the Langmuir model. Kinetic studies indicated that the sorption of
Pb(II) ions followed a pseudo-second-order model. Thermodynamic parameters such as standard
enthalpy change (ΔH°), entropy change (ΔS°), and free energy change (ΔG°) were evaluated
from the sorption experimental measurements. The results showed that the sorption process of
Pb(II) ions on unmodified and modified onion skins was feasible and exothermic under the
conditions used in this study. The sorption process followed the mechanism of physisorption
Investigating the occurrence of E. coli O157:H7 in the final effluents of two wastewater treatment plants.
Get PDFAIM: The final effluent of two wastewater plants located in the Eastern Cape of South Africa were
tested for the presence of Enterohaemorrhagic Escherichia coli O157:H7 (E. coli O157:H7) isolates,
and characteristics of the isolates obtained were determined.
METHODS AND RESULTS: A total of 23 wastewater samples were collected from the treatment
plants at the final effluent point after the disinfectant stages of wastewater processing. Altogether,
540 presumptive E. coli isolates were obtained by colony counting on the E. coli O157:H7
chromogenic agar base supplemented with cefixime tellurite and were sub-cultured onto
sorbitol-MacConkey agar and tested for agglutination using the Prolex E. coli O157 latex test
reagent kit. The results showed that the 149 suspected colonies from SMAC agar were all negative
for the antisera.
CONCLUSION: None of the isolates agglutinated with antisera against E. coli O157. Thus no
presence of the bacteria can be confirmed from the treated effluents
SIGNIFICANCE AND IMPACT OF STUDY: The likelihood of the receiving water body and the
environment being contaminated with E. coli O157:H7 is therefore minimal
Toxicity evaluation of waste effluent from cassava-processing factory in lagos state, nigeria using the Allium cepa assay
Get PDFMutagenic and genotoxic effects of cassava wastewater (CWW) were investigated by assay of Allium cepa root
meristematic cells. The physicochemical parameters of the wastewater samples showing cyanide content were
also determined. In Allium root growth inhibition test, experimental onion bulbs were cultivated in various
concentrations of the CWW and distilled water was used as a negative control. After 72 h, the root tips from the
treated bulb were processed for cytological studies by orcein squash technique. The mean lengths of root
bundles were obtained and effective concentration (EC) values calculated. The cytotoxic effects on the onion
root tips showed strong growth retardation at high concentrations of the effluent with EC value of 10%. The 50
mitotic index (MI) rapidly decreased with increasing effluent concentration compared to control. There was
significant increase in frequency of chromosome aberrations (sticky chromosome, c-mitosis, vagrant
chromosome, bridges fragment, binucleated cells, multipolar anaphase, attached chromosome and laggard
chromosome) in root tip meristem cells of Allium cepa at all tested concentrations. Further analysis using oneway ANOVA revealed that there was a statistically significant difference (p<0.05) in concentration-dependent
inhibition of onion root growth, mitotic index and induction of chromosomal aberration in the Allium cepa test.
The results indicate that the effluent samples collected were highly mutagenic. The results of physicochemical
analysis revealed that the concentrations of some parameters (conductivity, total suspended solid (TSS), total
dissolved solid (TDS), biological oxygen demand (BOD), nitrate, cyanide, chloride and metals-magnesium,
aluminum, chromium, cadmium, manganese and iron) were above the maximum permissible limit set by world
health organization (WHO) and could partly be correlated with the toxicity of wastewater. The findings indicate
that the substances contained in the cassava effluents may be toxic to living organisms and may pollute the
environment if untreated
yesola , oses
No full textThe study focuses on the long run corporate tax avoidance of listed firms in Nigeria with a view to examine the ability of listed firms to pay low amount of cash taxes in naira of pre-tax earnings over a long run period of twelve years. A sample of 19 listed firms were selected based on purposive sampling technique from the list of NSE 30 listed firms on the Nigeria stock exchange. The long-run cash effective tax rate developed by Dyreng, Hanlon, and Maydew (2008) to measure long run tax avoidance was adopted. The study finds that there is variation across the firms in tax avoidance at long run with some firms achieving a lower amount of cash taxes in naira of pre-tax earnings compared to others. The study concludes that firms in the consumer sector pay more taxes than financial service sector though financial service sector firms declare more profit before tax than the consumer sector firms. The study recommends than financial service sector firms should contribute more to education tax in Nigeria
Spin-hall-active platinum thin films grown via atomic layer deposition
Get PDFWe study the magnetoresistance of yttrium iron garnet/Pt heterostructures in which the Pt layer was grown via atomic layer deposition (ALD). Magnetotransport experiments in three orthogonal rotation planes reveal the hallmark features of spin Hall magnetoresistance. To estimate the spin transport parameters, we compare the magnitude of the magnetoresistance in samples with different Pt thicknesses. We check the spin Hall angle and the spin diffusion length of the ALD Pt layers against the values reported for high-quality sputter-deposited Pt films. The spin diffusion length of 1.5 nm agrees well with that of platinum thin films reported in the literature, whereas the spin Hall magnetoresistance Δρ/ρ=2.2×10−5 is approximately a factor of 20 smaller compared to that of our sputter-deposited films. Our results demonstrate that ALD allows fabricating spin-Hall-active Pt films of suitable quality for use in spin transport structures. This work provides the basis to establish conformal ALD coatings for arbitrary surface geometries with spin-Hall-active metals and could lead to 3D spintronic devices in the future.Deutsche Forschungsgemeinschaf
Microbial community structure of a low sulfate oil producing facility indicate dominance of oil degrading/nitrate reducing bacteria and Methanogens
Get PDFAnalysis of microbial community structure of a low sulfate oil producing
facility in Nigeria using 16S rRNA gene sequencing technique revealed
dominance of oil degrading and nitrate reducing bacteria and methanogenic
archaea in produced waters and oil samples namely, Marinobacter (37%),
Azovibrio (21%), Thauera (10–28%), and Methanolobus (22%). On the contrary,
the associated oil pipeline samples revealed massive dominance of potentially
corrosive Methanolobus (60%) and Methanobacterium (25-27%). Further
experimentation shows that the methanogens implicated in oil pipelines are
corrosive moderate halophile that utilizes H2/CO2 and methanol as substrates.
More emphasis should therefore be on methanogenic archaea as opposed
to sulfate reducing bacteria (SRBs) during mitigation plans for microbially
induced corrosion (MIC) in a low sulfate oil producing facilit