The present research discusses a problem of seal damages in dam gates due to influence of water flow through sluices passage way. The low level sluices (L.L.S) of Merowe dam were taken as a research field to investigate the influence of flow on the gate seal. The core of the problem is that the rubbery seal of L.L.S gates is damaged and washed out during yearly operation in flooding season. In previous years there is many solutions has been tried in two ways: first way is by improvement ...
Recently, one of the major and serious worldly concerns is the limitation of energy resources. Sudan, in specific, confronts a critical crises relatingto fossil fuel resources, and mostly concerning the production of electricity energy from fired thermal power plants and hydropower. The primary energy supplies in the Sudan are 29% oil and gas, 71% hydropower. In this study, the potentials for renewable energy to generate electricity in the Sudan is analyzes. The results show that, they...
ABSTRACT Thousands of Base Station Antennas (BSA) have been installed in Nigeria to support the development of mobile telephony. At the same time there is a public concern about the electromagnetic fields radiated by these antennas, particularly there is a great fear by those living in the vicinity of these antennas, of being exposed to the harmful effects of this radiation. This fear has created the need to investigate and establish the level of radiation and also determine whether this lev...
ABSTRACT The study examined the state of health and safety risk management practices in the building sector of the construction industry and has the objectives to: evaluate the construction risks inherent in the building sector of the construction industry; examine the health and safety risk management processes adopted by the construction industry in Nigeria; validate the existence of identified factor(s) militating against the implementation of health and safety practices in the constructi...
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 In this work, the state of stress between adhesively bonded single lap-joints was determined. The state of stress between adhesively bonded single lap-joints was determined by using a linear elastic analysis and experimental testing. In the analysis part of this work, the shear and normal stresses in an adhesively bonded single lap –joints were predicted by subjecting the joint to tension; shear force, and bending moments. Differential equations were used to model the problem and ...
ABSTRACT In this work, the state of stress between adhesively bonded single lap-joints was determined. The state of stress between adhesively bonded single lap-joints was determined by using a linear elastic analysis and experimental testing. In the analysis part of this work, the shear and normal stresses in an adhesively bonded single lap –joints were predicted by subjecting the joint to tension; shear force, and bending moments. Differential equations were used to model the problem and ...
ABSTRACT The importance of Self-Excited Induction Generator (SEIG) cannot be neglected when it comes to low cost of maintenance requirement, low cost of operation, low operational cost, high reliability and availability. This dissertation presents a dynamic analysis of an autonomous Self-Excited Induction Generator (SEIG) showing dynamic loss of load performance. Analysis is carried out based of the d-q axis model, while considering the performance characteristics of the machine at constant ...
ABSTRACT The primary objective of this work is to form the foundation of a Road Management Maintenance System (RMMS) that Road Maintenance Agencies like FERMA can immediately implement to make better decisions pertaining to rehabilitation options. Further, this is to allow for appropriate decisions about the best type of maintenance and rehabilitation interventions to apply to the poor state of arterial roads taking into consideration various factors, least of which are the type and ext...
ABSTRACT A working inventory model is developed to incorporate the partial back ordering inventory with references to the back ordering inventory model by Jonah and Chukwu. The re-order point models of maximum expected cost and service level approach were also established. Data, covering the demand, set-up cost, and the Holding cost were obtained from the Champion Breweries Plc, other related data were estimated. These enabled the application of the models to obtain, the review period, ...
ABSTRACT Cardiotocogram based monitoring needs a reliable fuzzy logic system to reduce the incidence of unnecessary medical intervention and fetal injury during child labour, due to a high degree of uncertainty and imprecision. Presently, electronic fetal monitoring is based almost entirely on the Cardiotocogram (CTG), which is a continuous display of the fetal heart rate (FHR) pattern together with the contraction of the womb. Despite the widespread use of the Cardiotocogram, it has li...
Abstract Tolerancing in design stage and machining parameter optimization in manufacturing stage are related problems which have a great impact on overall production economics of a machining operation. Unfortunately, these problems have been viewed separately causing conflicts between design and manufacturing decisions. While a design decision is to attain a certain part tolerance in the manufacturing stage, the manufacturing decision may be more concerned about economical production and prod...
A temperature sensor is a device that reads the temperature of the surrounding and relays the temperature either in degrees Celsius or Kelvin. The LM335 temperature sensor (used in the experiment) gives out the temperature in degrees Celsius. It is calibrated to output the millivolt voltage reading in proportion to its units of measurement i.e. it outputs 10mV/0K. The main objective of the project was to build a temperature sensor circuit using a LM335. As part of the project, it was als...
ABSTRACT In this study, hydrodesulphurization (HDS), hydrodenitrogenation (HDN), hydrodemetallization (HDM), and micro carbon residue (MCR) renoval were investigated using residuum hydrocracking catalysts containing a zeolite component. It to well known that the strong Brønsted acid sites on the external surfaces of zeolite crystals increase the distillate yield and decrease the coke yield obtained when using fluid catalytic cracking (FCC) catalysts. However, comparatively few studies have b...
The purpose of this experiment was to obtain a basic knowledge on digital electronics and in turn set the stage to perform the analysis and design of complex digital electronics circuits. It also served as an opportunity to learn how the motion sensor worked by using it to turn the LED on/off. This was done by examining results that were brought forth after carrying out the experiment. The results were analyzed and observations made in order to draw accurate conclusions from the entire p...