ABSTRACT This work improves upon the Potential Field Method (PFM) for the navigation of autonomous mobile robots, through the introduction of a new Hybrid Virtual Force Field (HVFF) concept. The HVFF concept integrates the virtual force field (VFF), which is based on the principles of artificial attractive and repulsive potentials, with the virtual obstacle concept (VOC) and the virtual goal concept (VGC). In particular, the specific challenges resolved by the HVFF include the local minimal p...
ABSTRACT Two Dimensional Laminar Free Convection in a fluid contained in a long horizontal right triangular enclosure has been investigated using numerical techniques and an experimental study. The geometry of the enclosure is such that the base is assumed horizontal while the vertical height is adiabatic. Motion in the region is set up by heating the hypotenuse while cooling the horizontal wall. This model simulates heat transfer problems associated with pitched-roofs with suspended ceilings...
Abstract In Zimbabwe television (ZTV) transmission coverage is approximately 55% nationwide and is mainly confined to urban areas. The dissertation overviews activities of the author’s design of a solar tv transmitter prototype which will act as gap filler in remote areas where there is no television coverage. Due to recent progress in the field of Wireless Sensor Networks (WSN) in industry particularly for control and data processing, the same goal can be achieved in television broadcastin...
ABSTRACT The internet has become a key resource at Midlands State University for research and communication. The institution is also experiencing high students‟ population which in turn has led to more demand for bandwidth. The high students‟ population makes the overall available bandwidth shrink leading to slow internet connection making internet an ineffective academic resource. The institution has been responding to slow internet connection by buying more bandwidth which is so unecono...
ABSTRACT An electrochemical sensor based on nickel tetraamine phthalocyanine and nitrogen doped grapheme oxide (NITAPC-NDGONS (mix)) nanoparticles was developed for the simultaneous electrocatalytic oxidation of vanillin and ascorbic acid. FTIR (Fourier Transimition Infrared), electrochemical impedance spectroscopy (EIS) and Bode plots were used in the characterization of the synthesized modifiers (NITAPC), (GONS-NITAPC) and NITAPC-NDGONS (mix)). Cyclic voltammetry, linear sweep, chronoampero...
ABSTRACT Azo dyes have become an immerging and difficult pollutant to the environment. Industrial activities have resulted in disposal of these toxic dyes in effluent and among them is methyl orange (MO) dye. Proper effluent treatment schemes have become a necessity so as to be able to reduce the potential toxicity issues regarding plant and animal life due to the rise in demand for clean and safe water. Several methods have been applied for the removal and degradation of MO dye but have prov...
ABSTRACT Monitoring is very important in Industrial Automation to bring out reliability and accuracy thus the use of a SCADA system. SCADA is an acronym for “Supervisory Control and Data Acquisition.” This systems are widely used in industry for supervisory control and data acquisition of industrial processes. A Android-enabled mobile phone can be used as a client in a SCADA application in order to display and supervise an industrial refrigeration system. The project presents an actual im...
ABSTRACT Carbon nanodots (CNDs), nitrogen doped carbon nanodots (n-CNDs) and their composites with cobalt tetra aminophenoxy phthalocyanine nanoparticles (CoTAPhPcNPs) were employed towards the simultaneous detection of aspirin (ASA), ibuprofen (IBU) and indomethacin (INDO). The nanomaterials were characterized by FTIR, UV-Vis, TEM, cyclic voltammetry, electrochemical impedance spectroscopy, linear sweep voltammetry, chronoamperometry and differential pulse voltammetry. CoTAPhPcNPs/n-CNDs-GCE...
Abstract The study assessed the challenges faced by students in using Information Communication Technology (ICT) at primary level. The research was carried out in Cluster five of Glenview Mufakose District in Harare. In order to get an insight on the challenges, different authorities were reviewed. The descriptive survey design was adopted in this study. Probability and non-probability sampling techniques were employed in order to select participants in this research. Five teachers, twenty pu...
ABSTRACT This work examined thermo-mechanical and metallurgical parameters (temperature and cooling rate) that give rise to substantial improvement in the basic functional strength characteristics of high-yield reinforcing steels produced in a conventional mill. A new process tagged Temperature Tracking-Jet Water Spray (TT-JEWAS) was developed to achieve requisite in-process control of thermal variations on one hand and fast undercooling by spray quenching on the other. The alternative micro...
SUMMARY Metal forming is a production technique which enhances economic use of engineering material by minimizing metal wastage that occurs in machining processes such as lathe turning and milling. This technique employs a press tool for mass production of parts that are dimensionally compatible. The press tool comprises the section that provides the force the press, and the tooling section the die. Investigation of stretch-forming conditions to produce a si dome in order to determine the opt...
ABSTRACT The quest for effective forecasting models to meet the ever growing electricity demand around the globe has heightened and taken a much challenging dimension that cuts across rural and urban communities in under-developed, developing and developed economies. Electric Load Forecasting which is the accurate prediction of both the magnitude and geographical distributions of electrical energy demand over the different periods of planning horizon has become a vital process in the planning...
ABSTRACT On the 27th June, 1995, the Engineering professionals, policy makers , representatives from various sectors and the Hon. Minister of Works and Housing - Major General Abdukarim Adisa gathered here to witness the launching of the NIGERIAN ASSOCIATION OF ENGINEERING CRAFTSMEN (NAEC). An Association that into existence in 1993 after the amended Decree 55/70 by 27/92 which empowered COREN to regulate engineering profession in Nigeria.