ABSTRACT This study utilised positive Lyapunov exponents' criteria to develop chaos diagram on the parameters space of &dimensional harmonically excited vibration absorber control Duffing's Oscillator. Relevant simulations were effected by choice combination of constant step Runge-Kutta methods and Grahm Schmidt Orthogonal rules. Simulations of 4-dimensional hyper-chaotic models of modified Lorenz and R&ler were used for validation purposes. Lyapunov's spectrums were obtained at (197 x 307) m...
ABSTRACT This research work investigated the corrosion resistance of nickel- plated medium carbon steel and 18/8 stainless steel in cassava fluid (i.e. containing hydrogen cyanide). It simulated the effect of continuous use of the materials in a cyanide environment where corrosion products are left in place. Low carbon steel sample was nickel electroplated at 4V for 35 minutes. The plated sample, the unplated and the 18/8 stainless steel were then subjected to a cassava fluid environment for ...
ABSTRACT This study investigated the characterisation of the dyamnic responses of 3 dimensional Lorenz md Rosler models by Lyapunov's exponents using popular but laborious to implement Grahm Schmidt orthogonal rules over wider range of models driven parameters. The study also verifies a new proposed model for the validation of Lyapunov's spectrum when the requisite matrix depends on position of the model attractor.
ABSTRACT This paper presents the description and thermodynamic analysis of a new hybrid system of solar powered water heater and adsorption ice maker. Mathematical models were generated based on heat transfer in the collector, heat and lpuass transfer within the adsorbent-adsorbate pair and the themodynamics of the adsorption process. The numerical models developed from finite difference transformation of the resulting equations were developed into a MATLAB computer code for easy implementat...
ABSTRACT In semiautomated orange fruits canning factories, the concept of bouncing ball seems applicable to the raw material transformation process in which fresh hits are passed through conveyors from the supply station (feed station) on factory floor to an elevated height where processed hits are translated, ready for sales to customers. The motion of these oranges is similar to a ball constrained to an accelerating lift tabletop. As the orange ball drops onto the surface of the upward carr...
ABSTRACT Engineering materials, mostly steel, are heat treated under controlled sequence of heating and cooling to alter their physical and mechanical properties to meet desired engineering applications. In this study, the effect of heat treatment (annealing, normalising, hardening, and tempering) on the microstructure and some selected mechanical properties of NST 37-2 steel were studied. Sample of steel was purchased from local market and the spectrometry analysis was carried out. The stee...
Abstract This study investigated the corrosion resistance of plated and unplated steels useful as ornamentals in saline environment. Nickel plating of carbon steel was done in watts solution for 25minutes with a current density of 3 Adm-3 at 60o C. The nickel plated carbon steel was later gold plated for 20 minutes with a current density of 0.2 Adm-3 at 50o C . The plated and unplated carbon steels were immersed in saline environment for 360 hours. Weight loss was taken every 24 hours in orde...
ABSTRACT The four stroke reciprocating internal combustion engine has been used as a case study, being that commonly utilized in most automobiles. General properties of ceramics were discussed while exposure was given to some high performance ceramics. theoretical deduction and analysis were then carried out to show improved engine performance using ceramic components. The engine performance parameters considered are (i) power output (ii) mean effective pressure (iii) speed of engine rotation...
ABSTRACT This paper discusses the development of unique software for the design of various cam profiles for she plate cam operating a flat face follower. The method employed in this work is that of generating geometrical cam coordinates using standard cam motions, thereby avoiding the problem of undercutting resulting from graphical layout methods for similar cam and follower types. Determination of critical designs output parameters were carried out by the developed software computational a...
This study utilized fractal disk dimension characterization to investigate the system response of a nonlinear, harmonically driven pendulum of mass, m (or weight. W) and length I over a well-defined parameter plane of excitation amplitude versus damping factor. The system response was simulated at three drive frequencies (symbol,*) of 1/3, 2/3 and 313. A Runge-Kutta fourth order algorithm, coded in FORTRAN programming language was used to simulate the System response over a 101 by 101 para...
In this work, modifications have been done on a prototype pneumatic separator to improve its efficiency. The effects of the modifications were studied by carrying out performance test analyses on the two blowers and reciprocating sieve mechanism which make up the critical components of the separating machine. The variations in the feed weights of the sieve were analysed to determine the best and most effective screening process. Also, the best and least tilt angles of the blowers were co...
ABSTRACT Maintenance is important to the success and continuity of firms, particularly in the changing society as ours. The effectiveness and the survival of organizations are largely enhanced by the ability of management to ensure that there is functional equipment, lands and buildings, infrastructure and fixtures. In the manufacturing setup, there is wear and tear of machines and equipment in the periods of usage that require sufficient maintenance to enhance their useful life. This ensure...
ABSTRACT This research investigated the performance of rural and urban petty traders in AfigyaKwabre District. A total of two hundred (200) questionnaires were administered in the study area but one hundred and ninety-three (193) responses were received. Descriptive statistics was employed to describe the demographic characteristics, social capital of petty traders and their customers, the roles they play and challenges associated with petty trading. The findings revealed that demographic c...
In certain parts of the country and the globe, a consistent and steady supply of power is still scarce and inaccessible. In such places, this work will support refrigeration of nourishments, food, medications, etc... The results of such empirical research to assess the efficiency of household refrigerators is discussed in this article where melted petroleum gas (LPG) which is locally accessible comprising of 24.4% propane, 56.4% butane, and 17.2% isobutene varying from company to comp...
PowerPoint presentation on modernization in railways