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FUTOSpace is the Federal University of Technology, Owerri open-access repository that collects, preserves and make available in digital format the intellectual output of the university's community:
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- This community features books, book chapters and books published by faculty members in the university
- This Community features the proceedings of conferences, seminars and workshops hosted by the FUTO or other bodies but had staff from FUTO attending and making presentations
- This community features research articles from FUTO staff published in journals hosted by FUTO
- A community of series of scholarly public lectures designed to commemorate a faculty member's appointment to a professorship
- Scholarly resources with relevant discussion points for use by faculty as teaching lectures, student reading content, and study guides
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- Published Research Outputs
- Theses and dissertations by students and staff from all the Schools in FUTO
Recent Submissions
Studies of mechanicl properties of watermelon ring/pawpaw peel reinforced polyethlene composites
(Federal University of Technology, Owerri, 2016-06) Ezeibekwe, Stephen Uzodinma
Some mechanical properties of water melon rind and pawpaw peel reinforced Low density polyethylene (LDPE) and Linear Low Density, (LLDPE) composites have been studied. Two sets of filler loaded LDPE and LLDPE composites were prepared using the injection moulding techniques at a processing temperature of 190 0C Dispersing agent, silicon oil, was added to the composite as a plasticizer to improve flow, processability and to reduce the brittleness of the product. A comprehensive range of mechanical properties: tensile strength, (modulus of elasticity, elongation at break, elongation at yield), impact energy test and hardness test were carried out. Tensile properties of the composite showed an increase in tensile modulus, impact energy test, hardness test, a decline, in elongation at yield and break with increasing filler loading. The tensile strength was enhanced with the incorporation of the two fillers up to 20% filler loading and then decreased with further addition of filler. The result obtained showed that pawpaw peel and water melon rind can be used as reinforcing fillers in thermoplastics and secondly, development of composites, enhances their mechanical properties.
Performance assessment of monocrystalline and polycrystalline solar panel types used in Owerri, South Eastern Nigeria
(Federal University of Technology, Owerri, 2017-01) Onuoha, Elizabeth
The performance assessment of monocrystalline and polycrystalline silicon solar panels was conducted in Owerri. The solar panels made in Germany were produced by Flames Company and rated 100W. Both solar panels were subjected to the same weather conditions. The solar panels were placed side by side on the roof top and the outdoor testing was carried out in both the raining and dry season for 28days. Each of the solar panel was connected to 12V, 15A charge controller and to a load of 40Ohms. The open-circuit voltage (VOC), short-circuit current (ISC), load voltage (VL) and load current IL were measured using a digital multimeter. The maximum power (PM) and load power (PL) were calculated from the VOC, ISC, VL and IL. The results indicated that VOC for monocrystalline silicon solar panel was high during the early and late hours of the day while VOC for polycrystalline silicon solar panel increased as the insolation increases for both season. The monocrystalline silicon solar panel produced more current than the polycrystalline silicon solar panel. It was observed that both panels had high performance between 10am and 3pm of the day in the rainy season. The polycrystalline silicon produced the highest maximum power output of 96.80W while the monocrystalline had a maximum power output of 94.24W. The solar panels had a low performance during the dry dusty harmattan season as low sunlight weather condition was observed. (maximum power of 52.06W for the monocrystalline silicon solar panel and 50.95W for the polycrystalline silicon solar panel). Cloudy weather conditions affected the solar panel performance as both the voltage and current dropped whenever it rained. The polycrystalline silicon solar panel also has a fairly constant voltage (between 16.06V to 17.98V) while voltage for the monocrystalline silicon fluctuates (between 15.01V to 17.99V). The study showed that the polycrystalline silicon solar panel is widely used and cheaper even when the users may not have known the advantage of higher power output than the monocrystalline silicon panel.
Studies on the physico-chemical and bacteriological qualities on Njaba River in Nnenasa in Isu Njaba L.G.A of Imo State
(Federal University of Technology, Owerri, 2010-11) Ezerioha, Ethelbert
A comprehension analysis of a river system such as that of Njaba river reveals so much about physical, chemical and biological characteristics of a typical lotic aquatic ecosystem. An analysis of this river system was conducted between February and October, 2010 and so much findings were discovered as regards its physicochemical as well as bacteriological properties. Because a lot of external factors interplay on the quality of the river system, attention was place on these anthropogenic activities and water utilization patterns to ascertain environmental indicators that influence the status of its quality. Frequent environmental reconnaissance surveys were conducted based on samples collected from the river. Results obtained from laboratory analysis showed the Njaba River had high conductivity due to the presence of free ion acid radical. The presents of a high level of copper concentration was attributed to this. This had a lot of determine the kind of microbial activities predominant in the river system. The results obtained showed a high level of total coliform bacteria. Some of the anthropogenic activities attributed for this results included defecation. Solid waste disposal, cassava fermentation, washing of entrails from animals etc. it is recommended that appropriate monitoring techniques and laws be applied by the government so as to conserved these aquatic resources.
Comparative analysis of rice husk ash and saw dust ash on tensile strengths of concrete
(Federal University of Technology, Owerri, 2015-12) Ezenkwa, Chidiebere Sampson
This study focuses on the comparative analysis of rice husk ash (RHA) and saw dust ash (SDA) on tensile strengths of concrete. RHA and SDA were obtained from open burning. The physical properties and chemical composition of the ashes were investigated. Ordinary Portland cement (OPC) was replaced with RHA, SDA, and RHA-SDA at 5%, 10%, and 15%. Concrete mix design was done using SCALE149 (Structural Calculations Ensemble) Software. Nine concrete cylinders of dimension 150×300mm with 100% OPC or 0% replacement with pozzolan were produced. Eighty one concrete cylinders were also produced for each of the percentage replacement of OPC with RHA, SDA, RHA-SDA, making a total of 252 concrete cylinders. The concrete cylinders were cured by immersion and tested for split tensile strength at 28, 90, and 150 days. The results showed that RHA is a better pozzolana with combined (SiO2 + Al2O3 + Fe203) of 87.67% compared to SDA which was 50.03% . The Split tensile strength decreased with increasing RHA, SDA, and RHA-SDA OPC percentage replacement. Laboratory values of 0.86N/mm2 and 0.78N/mm2 were obtained at 5% and 10% RHA-OPC replacement, 0.77N/mm2 and 0.58N/mm2 were obtained at 5% and 10% SDA-OPC replacement. Similarly, 0.82N/mm2 and 0.64N/mm2 were obtained at 5% and 10% RHA-SDA-OPC replacement. Split tensile strength of concrete with RHA, SDA, and RHA-SDA were lower at early age of curing but improved at later ages of curing. For example, at 5% RHA-OPC replacement, 1.42N/mm2 and 1.85N/mm2 were obtained at 90 and 150 days of curing. At 5% SDA-OPC replacement, 1.28N/mm2 and 1.65N/mm2 were obtained at 90 and 150 days of curing. Similarly, at 5% RHA-SDA-OPC replacement, 1.35N/mm2 and 1.66N/mm2 were obtained at 90 and 150 days of curing, as against 1.34N/mm2 and1.61N/mm2 attained by the control at 90 and 150 days of curing. Models were developed to predict the tensile strengths of concrete containing RHA and SDA as binary and ternary blend with OPC at varying percentage replacements and curing ages. The models were tested and found to be adequate.
Online book sales application
(Federal University of Technology, Owerri, 2018-09) Jibiri, Janefrances Ebere
An online book store is an electronic medium in which books can be bought by customers at their own comfort. The online business transaction can be business to business, business to consumer, consumer to consumer or consumer to business. It also pertains to any form of business transaction in which the parties interact electronically rather than by physical exchanges or direct physical contact. The application provides the user with a catalog of different books available for purchase. The primary goal of this study buys and sells goods and services online. The problem of the study is that customers are not satisfied with the mode of payments, customers do not know the preferable web site to purchase book and they are not safe because of faceless sellers. This work aim at developing an application for Online Book Sales, which will solve the problems by getting the aggregate percentage of customers who preferred online stores and the best book site to buy books, to know the most preferred product purchase and also provide a satisfied mode of payment for customers. The research methodology used is explorative study which includes primary data and secondary data. The sample size chosen are 50 customers of Powell’s Books, Ebay, Abe Books, Amazon, Book Scouter and Cash4Books. The survey is based on questionnaire method. A Comparative Analysis on customer’s Preferences towards online book sales such as Powell’s Books, Ebay, Abe Books, Amazon, Book Scouter, and Cash4Books. In order to develop an application for online book sale, using a backend database, a middle tier of Microsoft Internet Information Services (IIS), a web browser as the front end client, Cascading Style Sheet (CSS), Active Server Pages (ASP).NET, Visual Basic (VB).NET as the programming language, Structural Query Language (SQL) Server Database and WAMP (Windows/Apache/MySQL/PHP) as the local server. The development of this work results are most of the customers are satisfied with the mode of payment, easy return facilities are enjoyed by most of the customers, due to privacy policies provided, almost all the customers feel safe while shopping online, customers feel that products are delivered to them on time and customers most frequently purchase academy books than other categories of books. The benefit of this work if implemented will improve cost control, improve high rate of success, security and quick delivery.