bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Systematic Mapping Study of Architectural Models for Achieving Utility in the Cloud
Authors: Odun-Ayo Isaac , Goddy-Worlu Rowland , Geteloma Victor , Okezie Fiona , Bishung Janet 
Published: October 2019

Abstract
Cloud computing is an important model that allows for information exchange between the various aspects of the Cloud using different service types and models. The issue of deciding a specific research scopemostly in terms of architectural models used in achieving utility in the Cloud, is usually a complex process for a researcher. However, a review or survey paper assists in easily identifying likely topics of research. The objective of this work is to carry out a systematic mapping study of architectural models for achieving utility in the Cloud. A systematic mapping research allows for categorization in a subject area using a scheme based on certain classification process. The scheme used in this paper was categorized into three facets namely: topic, research and contribution facets. The results showed for example that, 30.77% of the papers reviewed on architectural models for achieving utility in Cloud computing are related to evaluation research. The breakdown identified that 5.98% of the evaluation research dealt with design, 6.84% considered applications, 10.26% focused on performance models, 3.42% discussed implementation, 1.71% was on platforms and 2.56% dealt with component models. This study vividly identified gaps in the field of architectural models for achieving utility in the Cloud. This will stimulate interest for advanced studies by both researchers and industry practitioners.
Empirical Review of the Challenges of the Cashless Policy Implementation in Nigeria: A Cross-Sectional Research
Authors: Ejiobih Chukwuebuka , A.Oni Aderonke , Ayo Charles K. , Bishung Janet , Ajibade Adejoke , Koyejo Ooreofe , Olushola Austin 
Published: October 2019

Abstract
Since the implementation of the cashless policy on January 1st, 2012 in Lagos state which is aimed at reducing the high cost of cash production, circulation and distribution in Nigerian economy, the set-out goals have not been fully achieved due to several on-going challenges. This survey research was conducted to review challenges of the cashless policy implementation in Nigeria and to identify factors that influence the adoption of electronic payment for exchange of value. The Unified Theory of Acceptance and Usage of Technology (UTAUT) was employed to identify various challenges from data gathered through questionnaires distributed to different stakeholders in the economy. A total of 410 questionnaires were collected and the research work adopted used Partial Least Square (PLS) method and used SmartPLS software during the data analysis. The attendant findings were pivotal to understanding the challenges encountered in implementing cashless policy in Nigeria. Using UTAUT we measured the significance and impact of Social Influence, Facilitating Condition, Effort Expectancy, Performance Expectancy and Behavioural Intent to Use on Actual User Adoption. From the result, facilitating conditions has no direct effect on actual system use and trust has no positive effect on behavioural intention to adopt the system. This study shows that despite the implementation of this policy, a lot of users are still being faced with various challenges and more efforts are still being required to achieve an effective cashless society.
The prospects of adopting e-learning in the Nigerian education system: a case study of Covenant University
Authors: Ayomide Odegbesan Omobolaji , Ayo Charles , Atinuke Oni Aderonke , Adeoba Tomilayo F. , Chidinma Gift Okezie , Udenwagu Nnaemeka E. 
Published: October 2019

Abstract
The conventional method of education has shrunken adequate information access and acquisition capability. However, this as further widened the educational knowledge gap. This research study examined the prospect of adopting e-learning in the Nigerian educational system. The Unified Theory of acceptance and use of technology (UTAUT)modelwas utilized in other to properly investigate the adoption of e-learning for an improved educational system in Nigeria. Adescriptive survey design was employed, and a quantitative research method was used for data gathering and analysis. A total of 574 responses was obtainedfrom the research study respondents. The study analysis result showed that the Average variance extracted (AVE) for actual use, behavioural intention, experience, effort expectancy, facilitating condition, performance expectancy and social influence was o.738,0.790,0.670,0.804,0.749,0.861,0.514 respectively, and the discriminant value for actual use, behavioural intention, experience, effort expectancy, facilitating condition, performance expectancy and social influence were 0.859,0.889,0.897,0.819,0.865,0.928 and 0.717 respectively. This analysis result suggests that the research model convergent and discriminate validity were acceptable. Furthermore, approximately 59.7% of the variance of behavioural intention (BI) to adopt eLearning was illustrated by the PE (Performance Expectancy), EE (Effort Expectancy), and SI (Social Influence); Where R2 = 0.597. Furthermore, about 77.5% of the variance of actual adoption (AC) of eLearning was explained by behavioural intention (BI) to adopt eLearning Where R2 = 0.775. The result suggests that Performance expectancy (PE), Effort Expectancy (EE) and Social Influence (SI) have a positive effect of the behavioural intention to adopt e-Learning and the behavioral intention would lead to the actual adoption of eLearning. Additionally, Facilitating condition (FC) and Experience (E) have a positive effect on the actual adoption of e-Learning. The result of the research study suggests that the adoption of e-Learningin Nigeria educational system is influenced by the ease of use, performance gain, public sway, adequate support, and proficiency.
Understanding the interrelationship between electrical anisotropy and groundwater yield in a typical Basement Complex area
Authors: Adetola Sanuade Oluseun , David Oyeyemi Kehinde , Olayide Amosun Joel , Idowu Faloyo Jane , Sanmi Fagbemigun Tokunbo , Adesola Olaojo Abayomi 
Published: October 2019

Abstract
The rocks in the Basement Complexof southwestern Nigeria exhibit electrical anisotropy as a result of their heterogeneous nature caused by weathering, near-surface effects or presence of fractures. It is known that groundwater yield (Y) in a typical Basement Complex aquifers is related to its coefficient of anisotropy (λ). Therefore, it is essential to study the correlation between Y and λ in the basement complex. Ten (10) vertical electrical sounding (VES) points using Schlumberger array were studied in areas underlain by migmatite gneiss and quartzite rocks. The current electrode spacing (AB/2) varies from 1 m to a maximum spread length of 100 m. The quantitative interpretation of VES curves was done by using partial curve matching and computer assisted program called WinResist version 1.0 software. Dar Zarrouk parameters were estimated from the interpreted VES curves and thus coefficient of anisotropy (λ) was calculated from these parameters. Data on the groundwater yield at the VES points were also obtained. The results show that as λ increases, Y also increases with coefficient of correlation (R2) of 0.86 and 0.79 for migmatite gneiss and quartzite rocks respectively. To further investigate the relationship between Y andλ, a regression analysis was performed. The regression analysis that was performed on the dataset shows that λ contributes significantly to the regression models of the two rocks. The relationship between Y and λ reveals that groundwater yield could be predicted from the values of λ in a given locality.
Radiogenic Heat Model in the southern axis of Ogbomoso, SW Nigeria
Authors: Adagunodo T.A. , Bayowa O.G. , Ojoawo A.I. , Usikalu M.R. , Omeje M. 
Published: October 2019

Abstract
This study is aimed at estimating the radiogenic heat model in the southern part of Ogbomoso, Nigeria. In-situ measurements of activity concentrations of radioelements are randomly taken at seven locations. The individual data point is measured four times, while the average was recorded for accuracy. The results showed that the radiogenic heat produced per radionuclide varies from 28.71 to 143.55 ρW kg−1 for 238U; 89.60 to 217.60 ρW kg−1 for 232Th; 0.0010 to 0.0063 ρW kg−1 for 40K; with mean values of 73.83, 151.04 and 0.0033 ρW kg−1 for 238U, 232Th and 40K respectively. The total radiogenic heat production in the study area varies from 136.23 to 303.73 ρW kg−1, with mean value of 224.87 ρW kg−1. It is shown that thorium is the major contributor to the total heat generated in the study area. The study area is characterized by low heat production potential, which could be attributed to depletion of thorium and uranium in the geological rocks in the environs. Comprehensive radiometric survey to cover the entire city is recommended. This will help in characterization of the radiogenic heat produced per geological unit.
Investigating groundwater pollution at an open dumpsite using 2D geoelectrical resistivity imaging and vertical electrical sounding
Authors: Bakare K. M. , Aizebeokhai A. P. , Oyeyemi K. D. 
Published: October 2019

Abstract
Geoelectrical resistivity survey has been conducted within the Kurata dump site in Ota, south-western Nigeria. This present study focuses on the use of 2D resistivity imaging and Vertical Electrical Sounding to delineate conductive leachate point and degree of movement within the subsurface for conceivable groundwater pollution. The 2D resistivity survey was carried out using the ABEM Terrameter (SAS 1000/4000) System with multiple-gradient array electrode configuration. The Vertical Electrical Sounding was conducted using the schlumberger electrode configuration. One 2-D imaging profile of length 100m and one Vertical Electrical Sounding of length 200m were acquired on the established traverse. The resistivity data was inverted utilizing RES2DINV and WinResist to obtain the inverse model resistivity distribution. The 2D inverse resistivity models of the subsurface showed that the study site has a multi-layered aquifer system, four geoelectrical layers were inferred from the resistivity imaging and they are lateritic clay, clayey sand, sandy clay and coarse sand units. There is one aquifer system about 13 m which is highly polluted. The unpolluted aquifer system is localized around 19 m with inverted resistivity range 498Ωm – 685Ωm in the traverse. Also there might be conceivable sullying of deep groundwater system in the long term if appropriate moderation procedures are not thought about at the area.
Experimental evaluation of soil petrophysical attributes: Implications for sustainable agriculture
Authors: Oyeyemi K. D. , Aizebeokhia A. P. , Anake W. U. , Sanuade O. A. , Akinsiku A.A. , Olofinnade O. M. , Jonathan H.O. , Ayara W.A , Falade A. J. 
Published: October 2019

Abstract
Agriculture is man’s major supplier of his needs, particularly his primary need which is food. Soil is a major component for sustainable agriculture production needs to be studied and understood. Soil’s characteristics determine the type of crop that would grow and the nature of the yield of the crop. The area of study is Covenant University farmland, where twenty soil samples from the farm were collected and petrophysical parameters such as conductivity and salinity were analysed on each soil sample.
Radon Monitoring: Pathway to Environmental Sustainability
Authors: Usikalu M. R. , Achuka J. A. , Onumejor C. A. , Akinpelu A. , Omeje M. 
Published: October 2019

Abstract
One important dimension of environmental sustainability is the need to maintain ecosystem services critical to the human population. These services include providing food, shelter, and construction materials. It has been discovered that construction materials contain certain amount of radon. So humans are most susceptible to radon related problems because we spend at least one third of the day indoor. Maintaining environmental sustainability is crucial to attaining the Sustainable Development Goals (SDGs). Radon monitoring is essential in determining the actual level of exposure in buildings. The indoor radon concentration in Covenant University Centre for Research Innovation and Development (CUCRID) has been studied using RAD7 radon detector machine. The result fro the study revealed that the average cumulative radon concentration for the building is 16.15 Bqm−3
which is lower than the permissible recommended level. Hence, it can be concluded that the radon level in CUCRID building does not pose any risk level to the occupants therefore the environment is safe for workers.
Effect of low BAP Levels on Multiple Shoots Induction in Indigenous Nigerian Pumpkin (Cucurbita pepo Linn.)
Authors: Samuel Aworunse Oluwadurotimi , Voke Omasoro Regina , Soneye Bukola , Odun Obembe Olawole 
Published: October 2019

Abstract
Indigenous Nigerian pumpkin is a cucurbitaceous plant primarily grown in Southwestern Nigeria for its young leaves, which are relished as pleasant-tasting vegetable. In spite of its nutritional value, the plant is scarcely available compared to other vegetables. As a result, development of a rapid in vitro regeneration procedure is imperative to ensure all year round availability. The influence of 6-Benzylaminopurine (BAP) and 2,4-dichlorophenoxyacetic acid on multiple shoots induction from cotyledonary node explant of indigenous Nigerian pumpkin has been previously reported. However, the concentrations of BAP used may have been high, hence the inhibition of shoots formation on medium amended with plant growth regulators (PGRs). Can low concentrations of BAP alone elicit multiple shoots from cotyledonary node explant of indigenous Nigerian pumpkin? To ascertain this, we cultured cotyledonary node explants derived from 3-week-old in vitro grown seedlings for 8 weeks on Murashige and Skoog (MS) basal medium fortified with 0.35, 0.45 and 0.55 mg/L BAP. Medium without BAP (0.00 mg/L) was used as control. Mean number of shoots per explant was not statistically significant (P≤0.05) among the BAP concentrations employed except for control and medium augmented with 0.45 mg/L BAP. Medium fortified with 0.45 mg/L of BAP gave 3.25±0.921 shoots per explant and was therefore most effective for multiple shoots induction. The result showed that low levels of BAP were capable of inducing shoots formation from cotyledonary node explant of indigenous Nigerian pumpkin. Nevertheless, much lower BAP concentration than used in the present study should be investigated for the likelihood to elicit higher shoot responses.
Assessment of Particulate Matter (PM2.5) in Residential Staff Quarters of Covenant University, Nigeria
Authors: Oghenovo Itebimien , Benson Nsikak , Adedapo Adebusayo , Fred-Ahmadu Omowunmi 
Published: October 2019

Abstract
Over the years, the quality of outdoor air has received more attention than indoor air quality because people generally assume that only ambient air is polluted. Studies have shown that humans spend 70-80% of their time indoors, ranging from workplaces to homes. Based on the findings of these studies, outdoor exposure measurement is insufficient to estimate the total exposure of humans to particulate matter, PM2.5 pollution. The increasing interest of researchers and international bodies in indoor air quality evidenced in the study of different indoor pollutants, placing PM at the forefront. The air quality in the residential staff quarters of Covenant University was examined by taking continuous measurements from the indoor environment for three (3) days using standard sampling and analytical methods Air Ae Steward, an air quality monitoring device. The concentrations of PM2.5 in eleven (11) residential apartments were determined. The results indicate substantial indoor levels of PM2.5 with the highest and least mean values of 91.0±5.0 and 34.0±4.0 µg/m3 respectively.PM2.5 indoor concentration was found to be higher than the World Health Organisation guideline value of 25 µg/m3.Considering that inhabitants of these facilities spend more time indoors, appropriate ventilation systems would reduce health related risksassociated with PM2.5.
Background Radiation Dose in Selected X-Ray Facilities in Southwest Nigeria
Authors: Achuka J. A. , Usikalu M. R. , Aweda M. A. , Onumejor C. A. , Babarimisa I. O. 
Published: October 2019

Abstract
Radiation exposure monitoring is essential to ensure that dose limits are not exceeded. The goal of this study is to assess the level of radiation exposure from radiography facilities in the study environment in order to promote radiation safety. Digilert 200 was used to determine the level of exposure in and around radiography facilities in five X-ray diagnostic centres in southwest Nigeria. The mean background exposure in centres A, B, C, D and E were 0.137 µSv/h, 0.170 µSv/h, 0.164 µSv/h, 0.183 µSv/h and 0.148 µSv/h respectively. The cumulative mean exposure in a year for centres A, B, C, D and E were 0.961 mSv/y, 1.193 mSv/y, 1.146 mSv/y, 1.281 mSv/y and 1.034 mSv/y respectively. The background radiation dose from the exposure level in all the centres exceeded the recommended limit but for centre A. High quality standard lead shielding and periodic radiation protection monitoring should be employed in centres with high radiation exposure.
Design of a joint angle measurement system for the rotary joint of a robotic arm using an Incremental Rotary Encoder
Authors: Oguntosin Victoria , Akindele Ayoola 
Published: October 2019

Abstract
The design of a prototype system that measures the joint angles of the rotary joint of a robotic exoskeleton is presented in this work. An incremental rotary encoder is a sensor that can be connected to any rotary joint to measure the angle of rotation, speed of rotation, direction of rotation (clockwise or counter-clockwise motion) as well as the acceleration of a joint. The measurement system using a rotary encoder which generates an electrical signal either analog or digital according to the rotation movement was designed in this work. A prototype rotary joint having a 270° range of motion was fabricated with ABS plastic using 3D printing and then connected to an incremental rotary encoder to measure its speed and angle of motion. A robotic exoskeleton was then proposed to be used with the tested and developed measurement system.
Trends of Sputtering Parameters in Monte Carlo Simulations of Rare Gas Impingement of GaSb, AlSb and InSb
Authors: Oyewande Oluwole E , Babalola Israel B , Aizebeokhai A. P. 
Published: October 2019

Abstract
Binary alloys of Group III-V metals and metalloids, such as GaSb, InSb and AlSb, were recently found to be very promising spintronic materials. For such potentially innovative materials, the quantum spin properties of constituent electrons can be exploited, for better enhanced high-tech applications, than the particulate dynamics of the electrons as in current electronic device applications. Ion beam surface sputtering is a versatile tool for crystal and thin film growth in materials science and characterisation. Consequently, trends of some sputtering parameters were investigated through Monte Carlo simulations of the bombardment of the binary compounds GaSb, InSb and AlSb using Argon, Helium and Krypton ions. The sputtering parameters for the binary compounds were found to be inconsistent as the angle of incidence increased, which occurred for different ion and energy combinations. Also, the maximum sputtering yield did not occur at a particular angle but within a range of values, 65° -85° and 75°- 85° for ion energies 1keV and 10keV respectively. The sputtering yield was also found to increase with an increase in the ion energy.
Dimethylformamide-mediated synthesis and characterization of novel pyrazole- and pyrimidine-based 3,4-dihydropyrimidine-2(1H)-thione derivatives
Authors: Ajani Olayinka O. , Jolayemi Emmanuel G. , Owolabi Fisayo E. , Aderohunmu Damilola V. , Akinsiku Anuoluwa A. , Owoeye Felicia T. 
Published: October 2019

Abstract
Pyrimidine, an essential component of nucleic acid is currently reported for its potential application in Acquired Immune Deficiency Syndrome (AIDS) chemotherapy. Also, pyrazole nucleus, a versatile heterocyclic compound is gaining more attention in drug designs owing to its pharmacological therapeutic potentials. Hence, this present study deals with cost effective synthesis of 6-methyl-4-phenyl-5-(substituted-5-phenyl-4H-pyrazol-3-yl)-3,4-dihydropyrimidine-2(1H)-thione derivatives which are concisely known as pyrazole-based pyrimidine scaffolds. The multicomponent reaction of benzaldehyde, acetyl acetone and thiourea in the presence of catalytic amount of hydrochloric acid (HCl)ab initio produced 5-aceto-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine, 1. Later, room temperature Claisen-Schmidt condensation of precursor 1 with diverse aromatic aldehydes which were benzaldehyde derivatives led to the formation of α,β-unsaturated carbonyl side chain, 2a-h. Finally, the thermal annellation through synthetic cyclization furnished crude products which were purified by recrystallization to afford 6-methyl-4-phenyl-5-(substituted-5-phenyl-4H-pyrazol-3-yl)-3,4-dihydropyrimidine-2(1H)-thione derivatives 3a-h in a cheap condition. The chemical structures were authenticated using IR, UV, 1H-NMR and 13C-NMR as well as analytical data. The final products 3a-h possessed good candidature for further investigation regarding their biological activities and pharmacological potential for new drug discovery.
Adsorption of lead ion from aqueous solution unto cellulose nanocrystal from cassava peel
Authors: Vivian Abiaziem Chioma , Bassey Williams Akan , Ibijoke Inegbenebor Adedayo , Theresa Onwordi Chionyedua , Osereme Ehi-Eromosele Cyril , Felicia Petrik Leslie 
Published: October 2019

Abstract
Acid hydrolysis was used for the synthesis of cellulose nanocrystal (CNC) from cassava peel (CP). The process was carried out at 450C for 45 min using 64% concentrated sulphuric acid, Pb2+ was removed from aqueous solution using the synthesized CNC adsorbent. Cassava peel cellulose nanocrystal (CPCNC) was characterised using FT-IR and X-Ray diffraction techniques. The different operational factors were examined to enhance the conditions for optimum adsorption of Pb2+. The equilibrium adsorption figures fitted well into both the Freundlich and Langmuir isotherm models, indicating that adsorption was due to the formation of a monolayer adsorption unto a homogenous surface and showed a good relationship between the Pb2+ and the CPCNC. The separation factor, RL, which is a dimensionless constant ranged between 0.02 and 0.248 and indicated that the adsorption was feasible and favourable. The optimum adsorption capacity was 6.4 mg Pb2+/g CNC at 25°C and pH 6. This study revealed that this novel nanomaterial has an unlimited prospect for effective removal of lead ion from aqueous solution.