Electrical & Computer Engineering

Permanent URI for this collection


Recent Submissions

Now showing 1 - 6 of 6
  • Item
    Assessment of Heavy Metal Content of Drain Water within Cement Production Environment in Port Harcourt, Nigeria
    (2021) Iyama, W, Azuka; Edori, O, Simeon; Nwagbara, V, Uzoma
    This study was based on the assessment of heavy metal content of drain water within the vicinity of cement factory and other associated activities. Heavy metal concentration analysis was done using the atomic absorption spectrophotometer as described in APHA 3111B and ASTM D3651 The present research work deals with the study of seven (7) heavy metals (Cr, Mn, Fe, Cu, Zn, Cd, and Pb). The result showed ranges of Cr (0.25±0.01-0.29±0.01, Fe (<0.01-0.02±0.00), Mn (0.34±0.01-0.39±0.02), Cu (0.41±0.05-0.52±0.03), Zn (0.44±0.04-0.54±0.04), Cd (0.09±0.03-0.18±0.04), Pb (0.01±0.00-0.02±0.00). There was low concentration of Fe but Cu is gradually building up as its concentration is very close to the WHO limits even though below that of FEPA/ FMENV and SON. A one way ANOVA was used to compare the relationship of the three months (April, May and June) and the three stations (X, Y, Z). Temporal and spatial variation showed result not significant (p<0.05) as F-ratio were 0.1224 and 0.0121 respectively. Similarly, t-test was used to compare the mean values from the control values (p≤0.05). The result showed that for April and June there were statistical significance unlike in May compared to the control station results. The study also revealed that Cr, Mn, Zn, Cd exceeded the regulatory standards but Pb presence is a potential threat. The potential variation of heavy metals in the study was of the trend, Fe
  • Item
    Assessment of the Pollution Load of the Woji Creek Water Body, Port Harcourt, Rivers State, South-South, Nigeria
    (Advanced Research in Chemical Science, 2020) Iyama, William Azuka; Edori, Onisogen Simeon; Nwagbara, Victor Uzoma
    This study was aimed at assessing the pollution load of the Woji Creek River Water in Port Harcourt, Nigeria. This was based on eight water quality parameters of THC, PAHs, TOC, TOM, Oil/ Grease, DO, COD and BOD using three study stations in each area composed of the Woji, Akpajo and Rumuwoji River Water. The DO, BOD, COD were analyzed using Titrimetry, PAHs by the HPLC, TOC by the NDIR, while Oil/ Grease was analyzed by Partition Gravimetry. The result showed highest mean values of 0.68±0.028 (THC), 0.27±0.03 (PAHs), 5.94±0.023 (TOC), 10.24±0.016 (TOM), 10.78±0.02 (Oil/Grease), 5.51±0.00 (DO), 36.40±0.10 (BOD) and 104±1.00 (COD). The result showed that of partialregeneration but polluted when compared to known permissible limits and previous research studies. This may be attributed to the dilution effect of rainfall. There is an ardent need to monitor and control anthropogenic inputs into this strategically located water body which traverses the oil rich city of Port Harcourt, Nigeria.
  • Item
    Assessment of the Environmental Impact of Road Infrastructure in Countries: A study of the Namibia Scenario.
    (Scientific Research Publishing, 2019-12-17) Nwagbara, Victor, U; Iyama, William, A
    The assessment of the impact of road infrastructure in the developing countries using the Namibian case scenario was done based on the contemporary challenges of road use. This study employed a qualitative technique using a sample size of thirty (30) selected by the simple random sampling technique. The use of charts, tables and frequencies were done to explain certain trends in the study. A well-structured, valid and reliable questionnaire instrument was designed for the study based on the following research questions; what are the impacts ofroad transport on the Namibian environment and what are the possible measures that may be used to reduce environmental impact of road transport on the Namibian environment? Twenty-fiverespondents (83%) agreed that road transfer has drastically improved development and 26 (87%) respondents also accepted that it can improve Namibian economy. Similarly, it has also improved communication and technology greatly according to 27 (90%) respondents. To add more credence to the impact of road transport on the economy, all the 30 (100%) of the respondents agreed that road transport aids mobility within Namibia while 27 (90%) respondents supported the opinion that road transport aids in job search, 3(10%) disagreed. The result shows that car owners service are potential threats which can affect pollution levels as was supported by 97% to cause environmental pollution as well as 100% when combined with energy consumption. Similarly, all the respondents indicated the potential of increased accident rate from poor road safety. Felling of trees poses great danger (97% response) due to the degradation of the environment. Most respondents (77 and 83%) agreed that road transport can lead to land encroachment and loss of aesthetic and farming. This research has shown that eventually death rate may increase from mere ill-health to from the degraded ecosystem,24 respondents (80%).So many policies to protect the environment but the practical measures are to encourage impact assessment studies for road projects, land use control and human safety precautions on road use.
  • Item
    An investigation on the effects of feeder outages and non-linear loads on 11kV ring distribution network efficiency.
    (NUST, 2011) Kapali, David; Gope, Gideon
    This study investigates the impact of power quality problems on the efficiency of a ring distribution network. The paper focuses on the effects of outage and harmonics on the distribution network efficiency and the practical implications on power system economics and reliability. An 11 kV ring distribution network was modeled and simulated in DigSilent PowerFactory (Demo version) 14.0.512 software package. Five case studies were conducted on the network for normal operation conditions and abnormal conditions (outage and harmonics). A methodology to estimate the technical losses (economic losses) in the distribution system was developed and used as a basis for determining the network efficiency. A load flow based analysis was carried out on the distribution system to determine the voltage and current profiles under normal and abnormal conditions. It emerged that the loss of feeder cables or lines in the network has an adverse impact on the efficiency of the network. This raises the question on the existence and the need of an optimum supply configuration. It also puts an increased focus on the need of improved reliability engineering in distribution systems as the costs of failures could be high. The authors conclude that the efficiency of a ring distribution network is affected adversely during contingency (outage and harmonics). The degree to which the efficiency is affected depends on the initial optimal design configuration and the nature of the disturbance or contingency condition. Preventative steps that can be taken to “harden” equipment and systems to PQ problems are also suggested.
  • Item
    Optimising learning outcome via project-baased learning in the production of technicians.
    (Session M3G, 2006) Oyedokun, Zacchaeus
    The Department of Electrical Engineering runs a multi-exit level programs where student can obtain a National Diploma or the Bachelor of Technology. One of the requirements of the program is for graduates to be industry-ready and globally marketable. Project-based learning was adopted in the Department to produce graduates that are nationally relevant, industry compliant and globally marketable. Design Project 3 is one such course that gives the graduates an apex outcome and a cutting edge advantage in the market place. This was designed to improve employability of the graduates.
  • Item
    Can mouse and keyboard chase out chalk and blackboard in engineering education?
    (Namibia Open Learning Network Trust (NOLNET), 2005) Oyedokun, Zacchaeus; Oyedokun, Comfort
    The face-to-face method of instruction has dominated the teaching arena from time immemorial. However the rapid advances in information, computer and communication technology is rapidly changing the mode of knowledge transfer from teacher to learner. Remote classrooms and the virtual environment has seen the distribution of learning in time and space. However, there are challenges that must be faced in order for this mode of teaching to permeate all corners of knowledge transfer. There has been some resistance to adopting virtual classroom in practical-intensive, equation-laden courses. This paper discusses strategies that may be employed to surmount the hurdles. It shows that developing a digital learning suite is a prerequisite to successful floating of laboratory and/or equation intensive courses. The digital learning suite is a prerequisite to floating engineering courses in a virtual learning platform where the chalk and blackboard has been replaced by mouse and keyboard.