bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessment of road infrastructure using remote sensing and GIS methodology for monitoring the condition of paved and unpaved roads
Authors: Ojo S A , Olusina J O , Ngene B U , Busari A A , Adediran J , Eletu A 
Published: November 2019

Abstract
This research primarily aims to develop a method in which road distress can be identified at early stage so that it could be maintained and fixed early thus avoiding critical damage. The primary source of data for the project was obtained by field survey with the use of vehicle and a handheld GPS to obtain the coordinates of each distress and a digital camera was used to take the pictures of the distress. The secondary sources of data include the Google Earth Imagery and the Remote sensing data. The approach adopted in this work involves obtaining the Global Positioning System (GPS) and the photographs of each distress noticed on the road, and then attaching the photographs to the classified map. The study was conducted in Yewa South Local Government in Ogun State in Nigeria which cover an area of 656,54 sqkm with population of 168,850 at the 2006 census. The study area has a total road length of 893.017 km. Assessment of road infrastructure using remote sensing and ArcGIS Geodatabase methodology for monitoring the condition of paved and unpaved road is an efficient approach utilized in management, planning and subsequent development of the road network in the study area.
Integrated water resources management in Nigeria: Implications for sustainable national development
Authors: Ngene B U , Nwafor C O , Bamigboye G O , Ogbiye A S , Ogundare J O , Akpan V E 
Published: November 2019

Abstract
This research is aimed at reviewing the current position and implication of sustainable national development of Nigeria as it concerns holistic water resources management. A new model of integrated water resources management (IWRM) has been developed by researchers and theorists and supported by international organisations that emphasize the multifunctional nature of water. However, there has been much debate on the feasibility of IWRM especially in the African context. The approach adopted in this paper is the review of literature centred on the implementation of IWRM in developing countries and with particular reference to Africa and makes recommendations that would ensure continued progress in the management of water resources in Nigeria. Among the conclusions reached in this paper is the fact that although the process of implementing IWRM in Nigeria may be difficult, a progressive approach that prioritises capacity development, policy and institutional reforms, and transparency will go a long way towards ensuring that Nigeria’s vast water resources are managed and developed in a way that maximises benefit while maintaining the health of the natural environment.
The stability analysis of a highway embankment founded on lime-stabilized soft soils in Calabar, Southeast Nigeria
Authors: Okeke C A U , Ifediniru C , Adeyanju E , Ede A N 
Published: November 2019

Abstract
Highway embankment failures are common phenomena in Southern Nigeria. To this end,in situ geotechnical tests and laboratory analyses were used to characterize the underlying lithologic units along a highway alignment in Calabar, Nigeria. The engineering behaviour of the soils mixed with various lime contents was evaluated after a curing period of 28 days. Limit equilibrium analysis was used to determine the factor of safety (FS) for the most critical slip surface for the embankment with height in the range of 4 to 7 m. Undrained triaxial tests conducted on the unstabilized soil indicate an undrained shear strength of 10 to 17 kPa, while the undrained shear strength of the lime-stabilized soils varied from 87 to 198 kPa, as lime content increased from 3 to 12%. Stability analysis carried out on the unstabilized soil samples indicates that FS ranged from 0.88 to 1.33 for the various embankment heights and analysis methods, while FS for the shallow (1-5 m) stabilization varied from 1.09 to 5.02 for the various embankment heights, lime contents and analysis methods. The stability of the embankment was found to increase with an increase in lime content and depth of stabilization even for the most extreme loading condition.
Monitoring of riverbank stability and seepage undercutting mechanisms on the Iju (Atuwara) River, Southwest Nigeria
Authors: Okeke C A U , Ede A N , Kogure T 
Published: November 2019

Abstract
This paper presents the results of a monitoring programme designed to investigate the inherent factors contributing to channel instability and riverbank erosion on the Iju River, Southwest Nigeria. Detailed reconnaissance surveys and in situ measurements were used to determine the geomorphometric characteristics of the riverbanks at more than 15 locations along the river channel. Laboratory tests in combination with the Bank Stability and Toe Erosion Model (BSTEM) and Bank Erosion Hazard Index (BEHI) were conducted to determine the shear strength characteristics and erosion potential of the riverbanks. The BSTEM results indicate that the factor of safety (FS) decreased from the initial values of 2.64 and 4.42 to 1.09 and 0.51, respectively. Further correlation of FS with root depth and depth of tension crack showed that FS was positively correlated with root depth but decreased with an increase in the depth of tension crack. The high BEHI values of 26 and 32 gave credence to the assumptions regarding the high erosion potential of the Iju riverbanks. These research findings are essential for the development of a watershed-scale natural disaster mitigation plan for the Southwest region of Nigeria.
Investigating the near surface leachate movement in an open dumpsite using surficial ERT method
Authors: Oyeyemi K D , Aizebeokhia A P , Ede A N , Rotimi O J , Sanuade O A , Olofinnade O M , Ekhaguere O A , Attat O 
Published: November 2019

Abstract
Geoelectrical resistivity imaging technique was conducted at Abule-egba open dumpsite, Lagos with intentions to monitor the movement of the contaminant leachate within the near surface. The two survey traverses (T1 and T2) of 2D electrical resistivity tomography were conducted using Wenner array configuration with minimum electrode spacing of 1 metre and maximum data levels of seven. The inversion models revealed the two delineated geoelectrical layers which are sandy-clay and sand units. The leachate fluids has the resistivity values of 5.75 – 10.4 Ωm at depth range of 2.5 – 4.0 metres along T1 and T2 moving from NW to the SE section. The leachate fluids are capable of polluting shallow groundwater aquifer within the study area and the residents are advised to drill deeper in the subsurface for clean and portable groundwater resources.
Measurement of train-induced vibration for track parameter identification: Bayesian probabilistic approach
Authors: Alabi S A , Alabi T A 
Published: November 2019

Abstract
The train-induced vibration response is used to develop a comprehensive finite element model for the railway track, which considered rail-sleeper-ballast interaction. This model can be further use in the development of an operational monitoring system for railway track by following the Bayesian statistical system identification framework. However, it is believed that the uncertainties associated with the measured train-induced test data and model parameters are relatively high, therefore, the corresponding model updating problem will very likely to be in the category of unidentifiable case. Therefore, Markov chain Monte Carlo (MCMC) simulation was used in generating the samples for the approximation of the posterior uncertainties. The measurements also provide not only reference values suitable for model fitting, but also a good insight into the main features of the dynamic behaviour of the railway track system. Finally, the reliability and accuracy of the proposed method are demonstrated by numerically reproducing the system responses. Modelling assumptions are discussed, together with their implications on numerical results of the time-domain analysis, which were found to be in good agreement with experimental results.
He’s polynomials method for analytical solutions of telegraph equation
Authors: Edeki S O , Ofuyatan O M , Akinlabi G O 
Published: November 2019

Abstract
In this paper, He’s polynomials solution method (HPSM) is fully utilized for solving telegraph equation. The proposed HPSM is technically presented and applied to homogeneous linear form the telegraph equation. The results are expressed in closed form with good agreement compared to those in literature thereby attesting to the efficiency and reliability of the method as proposed. The HPSM remarked to be less time consuming with high level of accuracy. As such, it can serve as alternative to other methods.
Modified Almost Unbiased Two-Parameter Estimator in linear regression model
Authors: Lukman A F , Adewuyi E , Oladejo N , Olukayode A 
Published: November 2019

AbstractWu and Yang [1] proposed an almost unbiased two-parameter estimator as an alternative to the ordinary least squares estimator (OLSE) in a multicollinear regression model. We introduce modified almost unbiased two-parameter estimator by combining two ideas. The mean squared error matrix of the proposed estimator was derived and the performance compared with some existing estimators. The theoretical results were accompanied by a numerical example and a simulation study.
Infopreneurship in a developing country: Opportunities and Challenges
Authors: Aregbesola A , Van der Walt T , Owolabi S , Idiegbeyan-ose J , Okocha F , Eyiolorunshe T 
Published: November 2019

Abstract
The purpose of this paper was to discuss the opportunities and challenges of infopreneurship in a developing country. It started with the introduction of the concept; it further discussed the current state of infopreneurship in Nigeria. The paper further highlighted the benefits and challenges of the practice of infopreneurship in Nigeria. It also stated that developed nations have been able to checkmate unemployment, hooliganism, robbery, terrorism and several other national challenges by encouraging infopreneurship through support from government and corporate organizations. The practice has been challenged in Nigeria by lack of structure and coordination from several operators. The paper concluded that infopreneurship plays a strategic role in the economic sector of Nigeria. Therefore, government at all levels should support the success of infopreneurship in Nigeria as this will help to reduce the rate of employment and at the same time lead to the development of the nation.
Implications of occupational hazards on attainment of the Sustainable Development Goals in the Nigerian Construction Industry
Authors: Tunji-Olayeni P F , Afolabi A O , Olowookere E I , Okpalamoka O I , Oluwatobi A O 
Published: November 2019

Abstract
The Sustainable Development Goals (SDGs) were framed to provide solutions to challenges confronting humanity. The SDGs are interconnected and will require the efforts of individuals and different sectors of the economy for attainment. One of the goals of the SDGs is to ensure good health and promote well-being for all by 2030. Sectors such as construction have high incidence of occupational hazards which affect the wellbeing of operatives in the industry. This paper reports the findings from a survey of 100 craftsmen in Lagos, Nigeria. Data obtained through the survey were evaluated by means of frequencies and charts. The study showed that majority of the craftsmen surveyed suffered one form of health challenge or the other. Occupational hazards drain the resources of workers. It also leads to absenteeism, low productivity and poor project performance. On a national scale, occupational hazards increase disease burden which is an additional cost to government spending on health care. The findings have negative implications on the attainment of goals 1 (no poverty), goal 3 (health and wellbeing) and goal 8 (decent work). Findings from the research can be used to create policies on occupational safety and compliance on construction sites.
Electric power quality control in electro-technical complexes of oil processing plant
Authors: Gulkov Y V , Turysheva A V , Gurkin P B 
Published: November 2019

Abstract
The paper deals with electric power quality research, in the load buses of the electrical networks of oil processing plant (“Production Association “Kirishinefteorgsintez”, LLC). Measurements were carried out under conditions of operating equipment at the distribution substations of the enterprise and at the division boundary of inventory responsibility with the power-supply system at the points of power transmission from the power-supply system to the industrial consumer. Assessment of the allowed contribution to the deterioration of electric power quality showed that at the increase in the rated capacity of drives based on frequency converters over 12% of the total installed capacity of electricity receivers of oil processing plant, the maximum allowed voltage waveform distortion coefficient values at the points of power transmission will be exceeded. To implement normalizing the electromagnetic environment and lowering non-sinusoidality of voltage, proposed is a system of measures, that allows controlling electric power quality indicators within the limits, stipulated by regulatory documents, resulting to reducing the risk of penalties by the power-supply authority and large scale undersupply of products under conditions of continuous technological cycle.
Numerical simulation of electromagnetic and thermal processes in high-speed electric machines
Authors: Pisarevsky Yu V , Burkovsky V L , Yu Pisarevsky A , Fursov V B , Borisova A I , Yu Gusev K 
Published: November 2019

Abstract
In this paper high-speed electric motors are considered, allowing one to obtain the necessary weight and dimensions for modern equipment. The creation of high-speed machines is directly related to the study of factors limiting their range of rotational speeds with the choice of electrical steel with lower specific losses and sheets of smaller thickness and modeling the magnetic field in the magnetic system of the machine.
Modernization of the energy system of an enterprise
Authors: Sklyar A V , Marinchenko T E 
Published: November 2019

Abstract
Energy saving in any enterprise is an actual problem associated with the rising cost of energy. In this case, the cost of electricity is among the most expensive components. One of the most effective ways to save electricity is to use energy-saving technologies and modernize energy systems, including using “small” energy systems. The task was to modernize the energy system of the Cherepovets poultry farm in order to reduce energy costs. After completing the cycle of work on a comprehensive assessment of possible options, production verification and implementation, the most effective way to reduce the cost of electricity was the method of upgrading the energy system based on “small generation” means using traditional fuels. The modernization allowed the Cherepovets poultry farm to annually generate up to one-third of its own electricity through a mini-combined heat and power station (mini-CHP) and keep the cost of the kWh generated three times lower than that in the grid. It confirmed the possibility of sharing the poultry farm and grids of its 6 (10) kV transmission lines and transformer substation on the territory of the farm.
Electromagnetic safety in points of overhead power lines and electrified railroads crossing
Authors: Buyakova N V , Zakaryukin V P , Kryukov A V 
Published: November 2019

Abstract
Traction networks of alternating current electrified railroads generate large electromagnetic fields with 50 Hz frequency. In points of overhead power lines (OPL) and electrified railroads crossing, traction network electromagnetic fields and overhead power lines interfere with each other, which can result in increase in intensities and appearance of the field complex spatial structure. To determine intensities of electrical and magnetic fields which are created in points of crossing, a procedure for intensities summing has been developed, which is based on fields intensities calculation with Fazonord software application, the fields corresponding to traction network and overhead power line mode. Modeling results indicated that intensities of traction network magnetic field are increased up to 13% by interference of 220 kV intensities power lines magnetic field, while at a regulated height of 1.8 m, magnetic field amplitude equals to 82 A/m. At the same time, OPL can increase traction field electrical field strength in the point of crossing by 66% while reaching 5.5 kV/m at 1.8 m height.
Problems of diagnostics of asynchronous motor powered by an autonomous voltage inverter
Authors: Korolev N A , Solovev S V , Zhukovskiy Y L 
Published: November 2019

Abstract
The article considers the most modern and most informative methods for diagnosing faults in squirrel-cage induction motors with a short-circuited rotor. The methods are based on the evaluation of vibrations and electrical parameters, as well as coordinates during operation and are normalized when powered from a sinusoidal voltage with frequency of 50 Hz. The main advantages and disadvantages of these methods, as well as the main indicators characterizing the general technical condition of the electric motor, are described. The application of these methods when powered from a non-sinusoidal voltage is impossible due to the complex harmonic composition of current and voltage. The consequence of this composition are the ripple moment and additional power loss. The interaction of the harmonics of the inverter and subharmonics, caused by faults, leads to the occurrence of a resonance phenomenon, and therefore to a decrease in the stability of the electric drive.
Diagnostics of inter-turn short-circuit in the stator winding of the induction motor
Authors: Smirnov A I , Voytyuk I N 
Published: November 2019

Abstract
A stator malfunction occurs due to insulation damage, which means that the stator is directly connected to the power supply, and a direct connection is the direct cause of a major accident. For this reason, a lot of research is being done to identify faults. In recent years, studies on Motor Electrical Signature Analysis are being performed, sensorless methods for fault diagnosis of the stator of an induction motor. However, it has problems with it, it has the difficulty in interpreting multi-faults and in detecting an inter-turn short circuit of a stator. This paper suggested a tool that can diagnose 2-turn short circuit, through the relationship between self-inductance and mutual inductance in the synchronous reference frame of a D-Q transformation.
Bearing diagnostics of slow speed industrial rotating equipment by shock pulses
Authors: Barkova N A , Barkov A V , Fedorishchev V V , Grishchenko D V 
Published: November 2019

Abstract
Fifty years have passed since the world’s first patent for a widely used method of the rolling element bearings condition monitoring by ultrasonic pulse vibration (SPM-method) was registered. The method is widely used in the power industry and in other industries. During these years, several technical realizations of this method were implemented. These methods are based both on the form of the recorded single pulses analysis and on the spectral analysis of the envelope of periodic pulses. But in all implementations, there remains a problem of establishing the relationship of controlled vibration parameters with the defect severity. The paper analyses the possibility of detecting and assessing the risk of rolling element bearing defects in low-speed rotating units by vibration excited by shock pulses, the sources of which can be both the bearings and the tooth wheels. In the production of electricity such units include rotary heat exchange equipment, among the major consumers - rotary steel furnaces for different purposes The proposed solution - a synchronous analysis of the pulse vibration of all bearings of low-speed units at medium, high and ultrasonic frequencies.
Analysis of research and area of application of self-resetting liquid metal fuse
Authors: Kuznetsov A V , Yurenkov Y P 
Published: November 2019

Abstract
The article shows that the level of research to date, both in Russia and abroad, does not yet allow the development of industrial samples of liquid metal self-resetting fuses. However, the high speed and current-limiting properties of the self-resetting liquid metal fuse are of interest in continuing research. The use of the self-resetting liquid metal fuse as a current limiter competitive with current-limiting reactors received a more complete scientific substantiation and development. It has been found that a common disadvantage of all structures of self-resetting liquid metal fuses is that during the switching process the channel of the dielectric bushing of the self-resetting liquid metal fuse is subjected to arc erosion with each triggering, which reduces its switching resource. There are proposals to increase the switching resource through the use of materials more resistant to the effects of an electric arc, constructive and circuit solutions. From the point of view of speed and current-limiting properties, it is preferable to use fusible alkali metal inserts in the self-resetting liquid metal fuse. It is noted that the amount of research that has been conducted makes it possible to create a current-limiting device based on a competitive self-resetting liquid metal fuse with current-limiting reactors. To do this, it is necessary to combine the efforts of all interested industrial and scientific organizations, to create and explore a mock-up sample.
Stability analysis of piecewise defined nonlinear ambiguous system by direct Lyapunov method
Authors: Bruslinovskiy B V , Dobroskok N A , Lavrinovskiy V S , Galiullin R I , Mokhova O V 
Published: November 2019

Abstract
In this paper the piecewise defined nonlinear ambiguous system is considered. The stability of such objects is investigated using separately excited DC generator with two excitation windings with relay control system taking into account magnetic hysteresis phenomenon. The Lyapunov function for this system is designed by direct Lyapunov method and its generalization through Dini derivatives that allows approving the stability of generator with nonlinearities.
Simulation modeling of DC electric drive for mine hoist
Authors: Pogorelov A V 
Published: November 2019

Abstract
The article describes the adjustable electric drive of skip hoisting installations of the mining enterprise. A simulation model of this object has been developed in the MatLab software package using the Simulink environment. The lift cycle was simulated using a five-period motion tachogram and graphs of dependencies of the following variables on time were obtained: the movement speed of the skip, the armature current and the motor torque. The simulation results showed that this simulation model corresponds to the actual technological process and allows further research on the operation of skip hoists.
Differential equations of synchronous generator with active-inductive load
Authors: Tokarev L N 
Published: November 2019

Abstract
This article presents differential equations of the synchronous machine transformed by Park in line with the theory of two reactions, i.e. in axes d-q. These equations were transformed, in turn, by the author. Using the equations transformed by the author it is possible to create programs of transients analysis in ships’ electric power plants. Generator voltage values are output ones–like in physical systems–in computer programs developed with the help of the given equations.