Featured Papers

done_all Engineering

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    IMPROVING HOME REQUEST SERVICES WITH WEB-BASED ANDROID APPLICATION

  • person_outlineAuthor(s): Nwobodo Nzeribe HN, Chibueze KI
  • subjectCategory: Engineering
  • access_time10 April, 2021
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    The challenges experienced domestically require immediate service responsiveness of various sub-professionals. These challenges and investigative landscapes draws awareness to epileptic services of this home demand services and tends to an increase of wears and tears of domestic appliances and equipment, hence decreasing their downtime and production. This outcome however is as a result of the hitches inaccessibility of these sub-professionals (artisans) to assist in their maintainability. This paper titled “Improving Home Request Services with Web-Based Android Application” is aimed at designing and implementing an improved home demand services using automated web-based android applications. This study was realized using object-oriented methodology in line with the necessary universal modeling diagrams for the system design and was implemented using Java programming language in android studio as the software development kit. The improved developed system was hosted locally and tested using furry investigative toolbox (instrument tool for testing mobile applications), and the result was recorded and compared with other services rendering systems. The result showed that the developed home request services with web-based android application alleviated the problem of moving about searching for sub-professional (artisans) to render domestic services.

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    Life Cycle Assessment of a Petroleum-Contaminated Soils Thermal Desorption Unit

  • person_outlineAuthor(s): Adeniran JA, Mustapha SI, Yusuf RO, Baruwa MO
  • subjectCategory: Engineering
  • access_time3 September, 2020
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    Environmental issues involving the oil and gas industry have been growing in awareness; therefore high priority is given to waste handling and disposal. Although the thermal desorption unit (TDU) is meant to reduce the environmental damage of the waste from oil industries, it may also contribute to the damage. A way of putting this to check is by taking the life cycle assessment of the operation. This study presents the environmental impact assessment using a gate-to-gate approach of a thermal desorption unit in Nigeria, analyzed following ISO 14040 standards. GaBi software obtained from PE international was used to carry out the analysis with the management of 46,541,880kg of the waste mix for a period of 365 days considering the worst-case scenario as the functional unit. The results showed that fossil depletion is about 2,516,253 kg of oil equivalent, water depletion is 0.883 m3, and particles to air is close to 35% of the particles generated. Weak point analysis to show the unit with the greatest impact on the environment was also estimated by GaBi. This study proves that the operation of a TDU can be certified as eco-friendly.

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    DETERMINATION OF PERFORMANCE OF MODELS IN EARLY FLOW PERIOD OF A HORIZONTAL OIL WELL USING WELLBORE RADIUS AS DETERMINANT

  • person_outlineAuthor(s): Oloro OJ
  • subjectCategory: Engineering
  • access_time3 September, 2020
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    There are some other two-phase IPR methods available in the literature that can be used to predict the performance of oil wells. Hence, in this study, the objective is to carry out a comparison using a wellbore radius as a determinant. The aim is to know how wellbore affects productivity and also to know which model is more reliable in predicting the future performance of a horizontal well. In this work, the IPR curve was developed and used to analyse wells deliverability by estimating the production rate for a given bottom-hole flowing pressure and wellbore radius were used as a determinant. The results show that Wiggin’s method has a higher performance. The results have exposed the inflow performance relationship (IPR) of a horizontal oil well at the early flow time. It was observed also that wellbore radius affects productivity and from this, we can convincingly say that Wiggin’s method is better in predicting the future performance of a horizontal well

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    DEVELOPMENT OF ARDUINO-BASED DOOR SURVEILLANCE SYSTEM: (A PILOT STUDY)

  • person_outlineAuthor(s): NwobodoNzeribe HN, Nwankwo IJ
  • subjectCategory: Engineering
  • access_time1 September, 2020
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    Everyone wants to feel safe within their home and work environment. Over the years, home and office securities were achieved by employing watchdogs and security personnel to safeguard lives and properties. These methods worked for the time being but failed in some aspects as both the watchdogs and security personnel could be overpowered, drugged, and even be hurt by these attackers. This pilot research work is aimed at developing a door surveillance system that will improve the security of homes and offices by capturing the image of the person at the door as well as triggering an alarm and then displaying the captured image in the television kept inside. The system was implemented using a Passive Infrared Sensor (PIR) sensor and an Arduino microcontroller with software assistance of Arduino IDE and processing development environment required for its control. The wiring of the system in veroboard was done using its circuit diagram drawn and simulated in Proteus 6.0 environment. After soldering and packaging, the system was tested and the operation efficiency was satisfactory. In conclusion, this system provided some solutions to security shortfall in our homes and offices as the image of the individual is captured and stored for future reference, without the person’s knowledge.

  • library_books

    CHARACTERISTICS OF PRODUCTS FROM ANAEROBIC DIGESTION OF CASSAVA WASTE FOR BIOGAS PRODUCTION

  • person_outlineAuthor(s): Eboibi BE, Atikpo E, Ihueghian P, Ogiribo P
  • subjectCategory: Engineering
  • access_time26 August, 2020
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    This paper examines the characteristics of products from anaerobic digestion of cassava waste with and without starter culture. The anaerobic digestion experiment was conducted using a 20 litre anaerobic digester at mesophilic temperature for 41-day hydraulic retention time. In addition to experimental yields, maximum theoretical biogas yield and biomethane potential were estimated using Buswell and Neave model, while the Hashimoto model was used to determine the kinetic parameters. Digestate specie distribution was assessed using elemental analysis. The result of the study showed biogas yields of 0.1-0.25m3/kgVSadded for digester1 (D1), and 0.1-2.5m3/kgVSadded for digester2 (D2), with an average yield of ~0.2 and 1.0m3/kgVSadded for respective digesters. About 0.8m3/kgVSadded was the estimated maximum theoretical biogas yield, and 1.32m3/kgVSadded for CH4. The percentage of CH4 in produced biogas was approximately 60%. The correlation coefficient () was 0.91 (D1) and 0.96 (D2), while 0.06 (D1) and 0.32 (D2) was obtained for the decay constant (k) The elemental composition of digestates substantially reduce when compared with that of initial feedstock. About 40–68%C, 36.57%H2, 21.4–28.6%S, and up to 94%N was distributed to biogas phase, the remnant in the digestate.

  • library_books

    CO-LIQUEFACTION OF HYPERSALINE TETRASELMIS SP. MICROALGA AND COW MANURE FOR BIOCRUDE PRODUCTION AND AS MEANS FOR SOLID WASTE TREATMENT

  • person_outlineAuthor(s): Eboibi F.
  • subjectCategory: Engineering
  • access_time14 August, 2020
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    This paper investigated hydrothermal coliquefaction of the microalga Tetraselmis sp. and cow manure at different mix ratios and the characterisation of produced biocrude. The carbon and nitrogen balances across the reactor and energy recovery were also elucidated. The study was conducted using a 1L batch reactor at 300oC and 350oC at constant reaction time of 10min using ~16w/v% solids loading. The results showed that irrespective of reaction temperature, there were substantial influence on yield and properties of biocrude. Importantly, there were up to 60% reductions in nitrogen content of biocrude, which could be due to synergistic effect from interactions of feedstock molecules during liquefaction. These findings suggest blending of Tetraselmis sp. and cow manure could improve biocrude quality, while simultaneously treating waste.

  • library_books

    DESIGN AND IMPLEMENTATION OF MACHINE LEARNING-BASED SIGNATURE VERIFICATION SYSTEM (MLBSVS)

  • person_outlineAuthor(s): Nwobodo Nzeribe HN
  • subjectCategory: Engineering
  • access_time16 April, 2020
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    Handwritten signature is a behavioral trait in our societal and official life which can be used for human verification and authentication. Although a signature can be accepted only if it comes from an intended person, the possibility of more than one signature made by the same person being exactly the same is less. Some features of the signature may vary even when made by the same person, so detecting a falsified signature from an unauthorized person becomes a challenging task. This research work titled ‘Design and Implementation of Machine Learning-Based Signature Verification System (MLBSVS) is aimed at developing an effective and reliable model that detects feature extracts to recognize signature using machine learning tools. The model is trained with datasets of signatures and predictions are made whether a provided signature is from an intended person or forged. This model will enhance security in organizations for identification of unauthorized persons. MLBSVS was developed and implemented using MySQL and MATLAB as Software requirements and the hardware requirements which include HP Proliant Micro Server with 6GB Memory, Processor speed of 1.5GHz, 250GB HDD and 1Gbps NIC, Client computer with 2GB Memory, Processor speed of 2.5 GHz, 250GB HDD and 100Mbps NIC, Visual Display Unit, Keyboard, mouse, scanner or camera and Ethernet cables. In conclusion, a system that can learn from signatures and make predictions whether a signature is genuine or forged has been successfully implemented

  • library_books

    A MODIFIED UNIFIED THEORY OF ACCEPTANCE AND USE OF TECHNOLOGY (UTAUT) MODEL FOR E-HEALTH SERVICES

  • person_outlineAuthor(s): Osifeko MO, Emuoyibofarhe JO, Oladosu JB
  • subjectCategory: Engineering
  • access_time16 April, 2020
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    E-health is a technological tool with the capability of mitigating the myriads of challenges facing the healthcare sector in Nigeria if properly accepted, adopted and deployed. The evaluation of technological tools is usually carried out using a Technology Acceptance Model to improve the usage of these tools. One of such, is the Unified Theory of Acceptance and Use of Technology (UTAUT) model. However, the different economic, social and political environments underscore the need to modify these models to account for the peculiarities of the environment of study. In this study, a modified UTAUT model is developed for evaluating the use and acceptance of E-health services in Lagos, Nigeria. The study develops a modified UTAUT model from factors identified in a focus group discussion and existing literature. The developed model was validated using data describing E-health services usage that was collected using a questionnaire from ten healthcare facilities in Lagos State. 210 responses were received from users of E-health services in the ten healthcare facilities. The questionnaire measured ten identified factors influencing E-health services usage and acceptance. The results of regression analysis revealed that the Social Influence variable had an R-squared value of 0.729. The corresponding values for facilitating condition, Anxiety, Policy, Effort Expectancy, Awareness, Attitude, Self-Efficacy, ICT Infrastructure and Performance Expectancy are 0.550, 0.544, 0.534, 0.494, 0.489, 0.486, 0.449, 0.359 and 0.343 respectively. The result suggests that the strongest impact factor in E-health technology adoption in Nigeria is social influence which meant that most users would use the system if encouraged by their colleagues or superiors

  • library_books

    RENEWABLE ENERGY MANAGEMENT USING PERIPHERAL INTERFACE CONTROLLER BASED POWER METER

  • person_outlineAuthor(s): Onaifo N, Ezekiel SO.
  • subjectCategory: Engineering
  • access_time16 April, 2020
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    The paper is aimed at designing a management system that monitors renewable energy battery charging system. It incorporates a locally designed Power meter using microcontroller programmed using C language and a liquid crystal display. The microcontroller uses the processing speed of a computer to initiate and execute instructions. The microcontroller is connected to the wind and solar renewable system through the ACS 712, a current sensor that measures current and voltage divider network for the voltage measurement. The analogue current and voltage readings are processed by the PIC18F452microcontroller displaying the voltage, current and power readings. The load currents connected to the input port of the Peripheral Interface Controller are fed to the battery banks to charge the batteries. The switching arrangement of relays or contactors is connected through transistors to the output port of the microcontroller. This initiates switching from one battery bank to another. This it does by measuring the load current of the two renewable energies supply and switches the larger battery banks to be charged with the higher generated load current and smaller battery bank with lower load current. This ensures the power level of the battery bank is kept fairly constant during usage. This study shows the use of a locally designed PIC based power meter using two sources of renewable energy. This is not possible using the solar charge controller which is another form of a renewable management system and only accommodate solar energy. It also has no switching system which is an important feature of the locally designed PIC based Power meter. This study also shows that the PIC base power metering is cost-effective as it can manage different renewable energy sources compared to other renewable energy management system which can manage only one kind of renewable energy source.

  • library_books

    INVESTIGATION OF THE EFFECT OF SUGAR ON THE HARDENING OF DANGOTE PORTLAND CEMENT

  • person_outlineAuthor(s): Momoh O.R, Abdulmalik, F.O, Otuoze H.S, Ibrahim A.O. Bala E.
  • subjectCategory: Engineering
  • access_time24 September, 2019
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    The need to provide an alternative to other set time retarders, preventing cold joints in concreting, eliminating the need for constant vibration which might lead to loss of consistency and also offset the effect of high down hole temperature motivated this research. Therefore, the aim of this work is to investigate the effect of sugar on the set time on ordinary Portland cement (OPC) concrete considering the fact that sugar is readily available and at lower cost compared to other known retarders. The effects of sugar at concentrations of 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.07, 0.09. 0.25, 0.30, 0.40, 0.45, 0.50 and 1.0 % by weight of cement on cement paste and its strength at 28 days was investigated.  The setting time of the cement was found to increase from 121, 154, 220, 262, 282, 309, 342, 328, 128, 78, 68, 53, 40 minutes when the sugar content was varied from 0 % sugar content to 0.5 % sugar content respectively. Peak time was attained at 0.07% sugar content where a time of 342 minutes delay in set was recorded. Steady decline starts at 0.09 % sugar content and flash setting comes in between 0.25 and 0.5 %. The compressive strength test also showed slight strength gains with peaks at 0.02 % and 0.07 % where its load bearing capacity was determined to be 533 and 470 kN respectively. Thus, sugar can be used as a setting time retarder since its action does not amount to a loss in strength of the tested samples.

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