bluuebunny/crossref_metadata_2025_split huggingface dataset:
Electrochemical evaluation of the corrosion inhibition effect of essential oil extracts on mild steel in acidic environments
Authors: Loto Roland T. , Olukeye Tiwa , Okorie Eugene 
Published: December 2019

Abstract
The corrosion inhibition property of the combined admixture of neem leaf and basil oil extracts (NB) on mild steel in in 1M H2SO4 and HCl solution was studied with weight loss measurement, potentiodynamic polarization and optical microscopy analysis. Results shows NB performed effectively at all concentration studied in HCl solution with average inhibition efficiency above 94% and 91% (weight loss and polarization test) whereas the compound performed poorly in H2SO4 solution at all concentrations (excluding highest concentration, 2.5%) with average inhibition efficiency of 17% and 31%. At 2.5% concentration in H2SO4, the inhibition efficiency is 98.34% and 85.36%. NB exhibited mixed type inhibition property from the polarization plots. This observation was further confirmed from optical characterization of the steel surfaces where the morphology of the inhibited steel was relatively smooth while the non-inhibited morphology was badly corroded with visible corrosion pits.
Universal Design Of Selected Secondary Schools In Akwa Ibom State, Nigeria: Students’ Perception Of Accessibility Provisions In Meeting Their Needs
Authors: Sholanke A. B , Opoko A. P , Akpan O. S , Adigun T. F 
Published: December 2019

Abstract
A building or environment is usually expected to be designed to meet the accessibility and usability needs of its potential user, which include both able-bodied persons and physically challenged. Universal design (UD) is a development strategy for planning and developing buildings and environments to be easily comprehended, accessible and usable to the highest degree possible by all individuals regardless of their age, size, ability or inability. It is however observed that the physically challenged are often sidelined with inadequate or inappropriate accessibility provisions in public environments, including schools in Nigeria. To this end, the study examined the effectiveness of accessibility provisions in meeting users’ needs in selected secondary schools in Akwa Ibom State, Nigeria, with a view to making contributions on how to improve access to use such environments for users, irrespective of their mobility status in conformity with the ambition of UD ideology. The study was conducted in other to identify areas for further improvements based on users’ perception, towards enhancing social inclusion in academic environments in Nigeria. The study was designed as a cross sectional survey research that spans across three selected secondary schools in the study area. The study employed quantitative research methods, using structured questionnaire to gather data from a sample size of 136 students across the three secondary schools. The data was analysed with the 2016 version of Microsoft Excel software. Descriptive approach with the use of tables was used to present the findings. The result indicates that the only accessibility provisions considered not effective in meeting users’ needs are ramps. Among the key recommendations of the study is for locations where ramps are necessary, but not provided for in the schools, to be retrofitted with accessible ramps for the benefit of physically challenged users, towards improving social inclusion in the schools. The outcome of the study will be useful for providing direction to building professionals and policy makers towards making adequate and appropriate provisions for accessibility components that are effective for encouraging social inclusion in the development of educational environments.
Effect of Superplasticizer on Workability and Properties of Self-Compacting Concrete
Authors: Olowofoyeku A.M. , Ofuyatan O.M. , Oluwafemi J. , Ajao A. , David O. 
Published: December 2019

Abstract
From recent issues of stability, particle suspension, particle segregation, flow characteristics and cohesiveness in concrete, Superplasticizer has played an important role in this part. This research examined the effect of superplasticizer on workability and properties of self-compacting concrete (SCC). Three types of superplasticizers Conplast SP 561, Conplast SP 430 and Conplast SP 264 at different percentages (0, 10, 20 and 30%) with the same water cement ratio of 0.3, with M30 grade of concrete. The workability slump, v-funnel and l-box the test carried out on fresh concrete. Compressive strength test was carried out on the hardened concrete. All mix were satisfactory but the mix with conplast SP 430 had better workability and strength.
Insurance Receivables and Economic Growth: The Case of Nigeria
Authors: Nwani A.T. , Omankhanlen A. E. 
Published: December 2019

Abstract
The study was undertaken to establish the impact of insurance receivables on economic growth using life premium, non-life premium and insurance investment as the proxy for insurance receivables. The insurance industry is one which has strived in the face of economic crisis and is still striving to grow, with so many claims to settle, the insurance industry tends to invest their premium from life and non-life insurance policies so to offset claims, gain income and also contribute to the economy. This study hence conducted a research to know the extent to which these premiums and investment have impacted on the Nigerian economic growth. The study used the panel data between the periods of 2008-2017 among six insurance companies. The panel OLS was used to analyze the data and the hausman test was used to adopt the random effect result used to interpret the data. The result of the study showed that the life premium was positively insignificant to economic growth; the non-life premium was negatively insignificant to economic growth while the insurance investment was positively insignificant. This insinuates that the insurance industry has very little impact on the Nigerian economic growth. Further studies should be carried out by increasing the number of years for the data, the number of insurance companies and more variables can be added.
Design of a fluorescent tube antenna with defined copper wire coupling specifications
Authors: Alalade A M , Ndujiuba C , Adewale A A , Ekong E E , Etta M N 
Published: December 2019

Abstract
In this paper, the performance of a fluorescent tube antenna is analyzed with respect to the dimensions of copper wire utilized in RF coupling. The fluorescent tube antenna in the study is implemented using a 58.5cm long fluorescent tube with a diameter of 2.7cm and four different copper wires with provided dimensions, wound at specific chosen lengths. RF signals are generated and output power measured using a Handheld RF Signal generator and Spectrum Analyzer respectively. The performance index used to evaluate the improved functionality of the design presented is the Received Signal Strength (RSS) and the gain. A peak RSS value of -34 dBm is obtained using a 1mm thick copper wire wound at 50cm of the fluorescent tube length and the gain of the antenna is 14.37 dBi derived with the Friis Transmission Equation. Research findings are presented and compared to previous similarly conducted studies, and seen to perform favorably better.
Synthesis of biomedical Ti-25Ni-15Si-10HA alloy by mechanical alloying and spark plasma sintering
Authors: Bains P. S. , Mohal S. , Gill J. , Ohunakin O.S. , Adelekan D.S. 
Published: December 2019

Abstract
In this research approach, a β-phase titanium alloy was produced successfully employing mechanical alloying and consolidated with spark plasma sintering (SPS) process. Herein, Ni, Si and HA powders with varied weight percentage were used to fabricate the Ti alloy. The influence of HA addition on microstructure of the alloy was assessed using optical microscopy route and further amplified using field emission scanning electron microscopy (FESEM). The elemental composition and phase of Ti-alloy was investigated using x-ray diffractometer. Vicker hardness (HV) tester was employed to estimate the micro hardness of the specimen surface. During the FESEM analysis, it was observed that within the sintering process, alloy exhibits complex reactions with HA, which leads to the progress of bioactive compounds (CaO, TiO2, Ca3 (PO4)2, Ti2Ni, CaTiO3 and CaTiSiO5) enhancing the bioactivity of the Ti alloy. The fabricated Ti alloy (Ti-25Ni-15Si-10HA) exhibited superior microhardness (∼458HV) at 900°C, comparative to the other alloys of the native category. Based upon the current investigation, Ti-25Ni-15Si-10HA alloy could find applications as bioimplants in dental and orthopedic areas.
Mitigating Biodiversity Destruction of Infrastructural Projects through Environmental Impacts Assessment
Authors: Ugwu E.I. , Ekeleme A.C. , Okolie S.T.A. , Ibe O.P. , Chieke C.F. , Ibearugbulem H.O. , Omeje M. , Awoyera P.O. , Ede A.N. 
Published: December 2019

Abstract
The geometric rate of biodiversity loss in developing countries like igeria has been identified as a problem of major concern. The loss in biodiversity in modern times is evident in the extinction of many plants and animal species. In developing countries like Nigeria, more attention is given to aesthetics, functionality as well as the cost of proposed projects than the Environmental Impacts of the projects. During construction and rehabilitation of infrastructural projects, biodiversity is destroyed. Thus, this study was aimed at exploring the various ways by which infrastructural projects affect biodiversity, with a view to proffering ways of its restoration. The negative effects of infrastructural projects on biodiversity can be reduced through Environmental Impact Assessment (EIA). This will help in averting the detrimental effects on natural resources. In situations, where natural habitat loss is unavoidable, adequate mitigation measures such as provision of strict protection zones along the proposed projects should be adopted. In order to meet the Sustainable Development Goal, EIA should be carried out before projects that may have a negative impact on the environment are constructed.
Anti-mycobacterial and GC-MS Studies of Irvingia gabonensis Baill Ex. Lanen Stem Extracts
Authors: Olanrewaju I. O. , Mordi R. C. , Echeme J. O. , Owoeye T. F. , Ejilude O. , Aruwajoye A. O. 
Published: December 2019

Abstract

Irvingia gabonensis baill ex. lanen (Bush mango) is an ethno-medicinal plant that has been used for traditional therapeutic purposes. With the increasing rate of drug resistance to various diseases in the society today, there is the need for alternative sources of drugs for the treatment of such disease. The Bush mango plant presents a potential candidate for such drugs discovery. Extracts from the plant stem were derived by cold maceration separately in methanol (MeOH) and Dichloromethane (DCM) for a period of 7 days. Phyto-constituents were also identified in extracts of stems by using hyphenated mass spectrometer and chromatographic technique, the Gas Chromatography - Mass Spectrometer (GC/MS) while the functional group of such phyto-constituents were identified with the aid of Nicolet 5700 Fourier Transform– Infra-Red spectrometer. Anti-tubercular screening was performed on extracts against clinically isolated drug-susceptible strains (DS-MTB-1 - DS-MTB-5), drug resistant strains (DR-MTB-1, DR-MTB-2) and a standard tubercular strain, H37Rv. This was controlled with drug standards, rifampicin and levofloxacin. Extracts revealed the presence of phyto-constituents such as saponins, tannin, alkaloids and phenol. It was observed that both extracts recorded high % alkaloid content at 10.37±0.02. Also, identified by FTIR as the principal part of the extracts are hydrocarbon groups such as carboxylic acid (1042), while the presence of the volatile components such as 9-Oxabicyclo [6.1.0] nonane (C8H14O) and 1-Chlorobutatriene (C4H3C) were reported by GC-MS. Extracts exhibited significant anti-tubercular activity against all organisms. Therefore, this study promotes the use of Irvingia gabonensis baill ex. lanen for phytotherapeutics purposes.
A reliable strategy for slug flow attenuation in pipeline-riser systems
Authors: Ehinmowo Adegboyega B , Evwierhoma E.T , Aliyu Aliyu M. , Baba Yahaya D. 
Published: December 2019

Abstract
Oil and gas activities across the globe now take place deep offshore. To operate in this harsh environment, there are numerous challenges. These can be in the form of high cost of production, space constraints, operational and technological demands. The co-transportation of oil and gas in same pipeline is one of the operational and technological approaches adopted in the industry to meet the transportation of produced crude. This approach comes with its attendant flow assurance difficulties. Slugging is one of such problems which can constitute operational hitches resulting in production reduction and sometimes eventual plant shutdown. Existing attenuation techniques are limited in various ways. Therefore, seeking a reliable solution to this problem is highly desired.In this study, an experimental study of multiple techniques for slug attenuation was attempted. A passive device-the intermittent slug absorber, topside choking and topside separator were investigated. The results show that a combination of the methods proves to be more effective compared to individual techniques. A significant reduction in riser- base pressure of up to 39% was achieved. This is advantageous and translates to an increase in oil recovery. Thus, the proposed strategy helps to achieve system stability and improved production at a lower cost.
Experimental Study on the Use of Waste Polyethylene Terephthalate (PET) and River Sand in Roof Tile Production
Authors: Bamigboye G. O. , Ngene B. U. , Ademola D. , Jolayemi J. K. 
Published: December 2019

Abstract
This study deals with the effects of using Polyethylene Terephthalate (PET) and river sand in roof tile production. This work is based on experimental study of roof tiles produced with river sand and recycled PET in varying proportion of 10%, 20%, 30%, 40%, 50%, 60% and 100% of PET combined with the corresponding fine aggregate percentage. The PET plastics used were derived from waste plastic bottles for soft drinks. The shredded plastic was subjected to heat and ensured that it does not lose it’s plasticity. The tests which were performed to evaluate the physical and mechanical performance of this material were sieve analysis, specific gravity, water absorption, density and compressive strength. The results show that recycled PET replacement gives better results for 40 and 50% of plastic composite tile than Ordinary Portland Cement (OPC) at 28 days. In conclusion, the plastic composite tiles have both good strength and absorptive property for roof tiling.
Construction and Study a Regression Model of Construction Accuracy of Dynamic Characteristics of Magnetization
Authors: Lankin A , Lankin I , Grechikhin V 
Published: December 2019

Abstract
The purpose of the research is to build a regression model of the approximation error dynamic characteristic of magnetization, where we take the maximum total error as the dependent variable, the degree of the polynomial and the number of points as independent. This model will optimize, in terms of accuracy, the choice of the number of points of the dynamic characteristic of magnetization and the degree of approximating polynomial. This model was obtained using the software Statistica, which allows for factor experiments to obtain and further analyze the regression models of synergetic systems. Synergetic systems are complex open non-equilibrium self-organizing systems that are capable of responding to external influence by self-organizing structures.
Study of Sensing Unit of Bionic Robotic Arm Based on Regression Model in Software Package Statistica
Authors: Lankin A , Lankin I , Grechikhin V 
Published: December 2019

Abstract
Nowadays, more and more automation tools are used in production and in industry. An important development of this direction are the elements of bionics, which allow replacing human labor with robotic devices. Despite the fact that robots are used in many places, their functionality is limited to small flexibility. It is proposed to use a bionic robotic arm, imitating a human hand and allowing you to feel the force of compression. Such a robotic mechanism will allow replacing human labor in the places where a greater accuracy is required and ordinary robotic arms are not acceptable. This manipulator will allow one operator to control two machines at the same time (earlier, when all operations were performed manually, this was not possible), which significantly reduces costs. In the paper a scheme of such a bionic robotic arm was developed and studied.
The quality monitoring of outdoor lightning using IoT technologies
Authors: Bachurin A A , Jamous N , Slivnitsin P A 
Published: December 2019

Abstract
This paper discusses the various aspects of the instrumental quality monitoring of city outdoor lighting using IoT technologies on the example of the central area of Perm city, such as selection of the monitored parameter and its measurement methods, methods of processing measured data, the applicability of the results of measurements for various applications using Big Data.
Techniquesof Oil Well Equipment Diagnostics Using Dynamomemter Card
Authors: Shmidt I A 
Published: December 2019

Abstract
Currently, the most widely used equipment to oil extraction is a sucker rod pump. More than 70% of oil wells are equipped with this mechanism. The advantages a sucker rod pump are usage simplicity and high efficiency, but the main drawback is difficulties with diagnostics and repairing. So providing continuous operation of oil well equipment is the key issue in oil well maintain process. Nowadays, the most efficient method of oil well equipment diagnostics is building and an analysis of dynamometer card, namely dependency of load on rod string on polished rod displacement. This diagnostic method is widely used due to simplicity of its implementation, as well as clarity and easy interpretation of the results. If there are any problems in sucker rod pump operation, shape of dynamometer card changes. Moreover each specific fault in operation has unique characteristic shape of dynamometer card. In this article author proposes techniques overview of oil well equipment diagnostic using dynamometer card, the use of which is a big step in “Industry 4.0” model implementation in the oil production field.
A modern way of outdoor lighting maintenance
Authors: Slivnitsin P A , Bachurin A A 
Published: December 2019

Abstract
This paper considers the existing method of outdoor lighting maintenance, its disadvantages and advantages of well-known modern, but not used methods. Modern service methods using a new connector are introduced. The requirements for the connector are defined, its structural and parametric synthesis is made and for this an integrated digital model is developed. The economic justification for using the new service method is presented.
Semi-natural simulation system of a sucker-rod pump
Authors: Solodkiy E M , Efimov N A , Dadenkov D A , Yudin R Y 
Published: December 2019

Abstract
This article describes the development of a semi-natural torque load simulation system on an induction motor shaft that simulates the operation of a sucker-rod pump (SRP). For semi-natural simulation, a laboratory bench with an induction motor (IM) and direct current motor located on the same shaft is used. The four-link mechanism kinematic scheme of a sucker-rod pump and the implementation of software modules for calculating load torque are presented. The main results of simulation tests are given.
Iterative Procedural Internet Search
Authors: Trusov A , Gashkov A 
Published: December 2019

Abstract
The present study investigates the problem of sorting search result by relevance. The new algorithm based on iterative procedural Internet search is developed. The aim of the study was to improve the existing algorithm. Results show that applying the improved algorithm approximately doubles Normalized Discounted Cumulative Gain at k and therefore greatly decrease average time to find relevant documents in search results list.
Isolation of inulin oligomer from white yam tuber (Dioscorea rotundata) for preparation of curcumin-inulin nanoparticles
Authors: Nurdila  , Imran  , Kadidae L.O. , Kadir L.A. , Ramadhan L.O.A.N. 
Published: December 2019

Abstract
Research on the isolation of inulin oligomers from white tuber yam (Dioscorea rotundata) for the manufacture of curcumin-inulin nanoparticles has been conducted. The purpose of this study is to find out the results of inulin isolation from white yam (Dioscorea rotundata) as an ingredient in making curcumin-inulin nanoparticles. Based on the results of the isolation, the rendement of inulin obtained was 10.2%. The solubility tests revealed that inulin had 89% solubility and for curcumin-inulin particles, either with 1:2 or 1:3 ratio had the same solubility, i.e., 92 g/mL. The functional groups of inulin were analyzed by FTIR spectrophotometer. The IR spectrum of inulin showed the availability of OH bonds, CH bending, C=C bonds, C-O-C bonds, and C-OH bonds. The IR spectra of curcumin-inulin of 1:2 and 1:3 ratio, on the other hand, indicated the existence of OH bonds, CH bending, carbonyl strain, C-O strain, C-O-C strain, CH3 bending, and H-C=O bond. The morphologies of inulin and curcumin-inulin particles were analyzed using SEM. The surface shape of inulin was semi-spherical, which are different from the morphology of curcumin-inulin particles spreading over a size range of 169-283 nm. With this particle size, the curcumin-inulin particles tend to form nanoparticles.
A novel plasma reduction for the preparation of AuPd bimetallic nanocatalyst and its application in selective oxidation of benzyl alcohols
Authors: Zhou Jun , Cao Xiaoqing , Zhang Yue , Chen Jing , Li Song 
Published: December 2019

Abstract
In this work, a low temperature plasma reduction technology is developed for the preparation of AuPd alloy nanocatalyst. The HAuCl4 and PdCl2 mixture as catalyst precursor was directly decomposed on MgO support by plasma to form AuPd nanoalloy. Results demonstrated that the final particles states of nanoalloys prepared by this technique including size, morphology, and chemical valence are highly dependent on temperature of plasma treatment. The catalytic performance of AuPd/MgO in the selective oxidation of benzyl alcohols can be tailored by optimizing the synthesis parameter. A relative low temperature in plasma process prevents particles migration and helps to maintain the small size that favors high activity. The AuPd nanoparticles with diameter about 3.5 nm by optimizing the plasma treatment condition exhibit superior conversion and TOF compared to catalyst prepared by the traditional high temperature H2 reduction method. It is believed that the low temperature plasma technology has a unique advantage for the preparation of high-quality alloy nanocatalyst and could be extended for fabricating the other alloy nanocatalysts.
High-temperature corrosion resistance of nickel-base alloy 617 in supercritical carbon dioxide environment
Authors: Liang Zhiyuan , Gui Yong , Zhao Qinxin 
Published: December 2019

Abstract
Corrosion behavior of Inconel 617 in supercritical carbon dioxide at 650 °C and 15 MPa for 1000 h was investigated. X-ray diffraction, high-resolution transmission microscopy, and Raman spectrum were used to observe and analyze the corrosion products formed on Inconel 617. The results showed that the corrosion products formed on Inconel 617 were composed of a thick Cr2O3 layer, a thin Al2O3 layer and a carbon-penetrated zone from the interface between carbon dioxide and the oxide scale to the substrate. Carbon was deposited on the surface of the oxide scales, which was verified by Raman results. The oxidation of Inconel 617 suffered in supercritical carbon dioxide was more serious than the carburization of Inconel 617.