Abstract: This study investigates the Indoor Air Quality (lAQ) of a room apartment and focused on the number of occupants that a space or an apartment can accommodate as a result of increase in the concentration level of the CO2 contaminant present within the space. The law of mass action was applied to generate a relation between the concentration of CO2 produced and the concentration of the reactants (i.e., O2 and CO). A decay equation was also used to relate the variation in the number of...
ABSTRACT This work deals with the multi-faceted impact of gas flaring on a global scale and the different approach employed by researchers to measure gas flared and its resulting emissions. It gives an overview of methods employed by these researchers in the oil and gas industry, academia and governments in attempt to determine ways of measuring and reducing gas flaring and its emission drastically. This approach so far includes analytical studies, numerical studies, modeling, computer simul...
ABSTRACT In Nigeria, a satisfactory degree of reliability has not been attained in our power systems in recent times. The average duration of interruptions that customers experience is quite high and the degree varies from place to place. This is evident all around the nation, most especially in urban commercial cities. Previous researchers have focused on the assessment of power system reliability indices using different models. In this work, a computationally efficient modified linear con...
This paper will aim at shedding light on the efficiency of zif-8 nano-particles. It will show that zif-8 can be a leading tool in water treatment having a large surface area, high adsorption capacity and thermal stability. Zif-8 was also used to enhance characteristics of several materials such as MF-ZIF-8 sponge composite to enhance hydrophobicity for the selective sorption of oil. Also, its treatment was studied on electrospun nylon 6,6 NFM to enhance oil spill adsorption and we compared Ni...
Abstract: This paper presents the application offractal theory, especially fractal dimension to the formation of sawdust particles during operation with four detailed cases, which helps us to understand the distribution of the sawdust particles inhaled by sawmill workers and remove the effect of toxicity on their body quickly. Pattern of formation of sawdust in human lungs and other parts of the body (in fast branching rate) is described with a practical case study in a developing country. A...
ABSTRACT This study utilized correlation and distribution analyses to investigate the acceptability of application of two fractal dimension estimators to characterize the waveforms originating from excited nonlinear pendulum. Parameters selection sensitive simulation of the excited nonlinear pendulum waveforms was performed with the constant time step fourth order Runge-Kutta algorithm with codes developed in FORTRAN90. However, the waveforms validated by Gregory and Jerry (1990) and treate...
ABSTRACT The aim of this work is to determine the mechanical properties of cold drawn low carbon steel subjected to full annealing. The specimens were slowly heated up to a temperature of 9000C followed by soaking treatment of 60 minutes under this temperature in a muffle furnance. Tensile, charpy and Brinnel hardness tests were conducted to determine the yields strengths, tensile strengths, impact strengths and hardness of the annealed steel. The yield strength, tensile strength, hardness an...
Abstract For decade, thermal contact resistance (TCR) has been measured experimentally. Unfortunately, the database, which should regularly support decision-making on TCR coefficients, seems not to exist. Thus, companies result to using outdated or irrelevant data that limits lifespan of electronics devices, their performance and reliability. This paper mathematically models the problem of TCR between two media (plastic-metal interface) in semi conductors with reference to resistance and the ...
ABSTRACT The GP model was developed for production planning in a toothpaste factory. Two objectives were distinguished: minimization of processing cost, and maximization of the capacity utilization of production facilities. Two priority structures were used to explore the trade-off options. When processing cost minimization was assigned the first priority, the utilizations of Processing Plant 1 and Filling Machine 2 were 20.32% and 0.18% respectively. When capacity utilization was assigned fi...
Abstract Grinding is one of the most important fishing operations and it is very useful in our automobile industries. A grinding wheel is made of very small, sharp and hard abrasive particles or grits held together by strong porous bond. The paper presents, a control system for grinding process using neuro -fuzzy technique. The grinding parameters include circurmferentiaI speed of a grinding se ent workpiece velocity and work depth of cut. The maximum grinding temperature is very important ...
INTRODUCTION Excessive water production as result of coning and cresting has been a serious problem in the oil and gas industry. Coning or cresting are used to describe the mechanism underlying the upward movement of water and/or the downward movement of gas into the perforations of a producing well. Efforts have been directed at understanding the mechanism of water coning/cresting in vertical and horizontal wells. These efforts have led to the development of correlations for estimating cri...
ABSTRACT The traffic situation at many university campuses in developing countries has been a source of concern to both the school authority and the campus populace. This may be largely due to the increasing enrolment level for university admissions since most employers are certificate-biased instead of skill rewarding. The roads are often congested during the day thereby causing inconveniences to everyone. During the "peak period" when vehicular traffic is beyond what the road can contain co...
ABSTRACT Usage of ergonomically unsuitable classroom chairs and desks promotes bad posture while bad postures affect students’ learning, performance and health. Attention is rarely paid to ergonomic fitness of classroom chair and desk used by primary school pupils in Nigeria up till now. This study investigated classroom furniture status in the Staff School, University of Ibadan, Oyo State, Nigeria and developed an automated procedure for designing ergonomically suitable chair cum desk mode...
ABSTRACT An experimental study was undertaken to evaluate and compare the performances of a local barn and a platform, as storage structures for yam tubers (Dioscorea rotundata poir.) The criteria used for evaluation and comparison were the degree of weight loss during storage, tuber sprouting and rotting of yam tubers during a 17 week storage duration between March and Ju...
Abstract Simulation of reliable solutions of nonlinear engineering problems by means of stable numerical algorithms is a frequent and acceptable practice. This study focuses the development and investigation of Range-Kutta coefficients dependent stability polynomial for the second, third and fourth orders Runge-Kutta schemes. The development utilized matrix inversion operation procedure that involves determinant and cofactors computation of relevant matrix. The validation was made referencin...