Abbreviation: J. Eng. Technol. Res.
Start Year: 2009
Page 1 of 9, showing 20 records out of 173 total, starting on record 1, ending on 20
DOI: 10.5897/JETR2017.0616[Article Number: E63314566041]
In this study the manufacturing of graded PA6/PA12 blends by selective laser sintering (SLS) was investigated. Sintered blend specimens were analyzed by scanning electronic microscopy and flexural tests. The PA6/PA12 parts with functionally-graded composition in the Y and Z directions were built by SLS. Information on the pure component properties and the microstructure and mechanical properties of the sintered blend... Read more.
DOI: 10.5897/JETR2017.0622[Article Number: 4EA61AE65842]
This paper determines contaminant dispersivity in the coastal sand of River Mersey Outer Estuary using results of field measurement from dye solute injection. Dispersivity is an alternative parameter for describing the characteristic behaviour of porous media. In this case, 3-D plumes in 2-D Photo-images were taken from multiple injection zones across the foreshore. The colour images were calibrated, standardized and... Read more.
DOI: 10.5897/JETR2016.0592[Article Number: 6E3C31465457]
The aim of this study is to model screw feeder unit to handle granulated wet cassava to the flash dryer column. The knowledge of the flow behavior, physical and mechanical properties, rheology of the product and the geometrical characteristics of feeders unit were essential to evaluate the best conditions of handling granulated cassava based on the theory of virtual works. The effect of granular media strain on the... Read more.
DOI: 10.5897/JETR2015.0580[Article Number: F4996CC65461]
Global climate change resulting from increased greenhouse gas emission and environmental pollution remain a serious threat to the world. Food processing industries is one of the major contributors to global greenhouse gas emissions. Intergovernmental Panel on climate change (IPCC) reported that greenhouse gas emission should be reduced to avert the worst effects of climate change. One of the ways to reducing greenhouse... Read more.
DOI: 10.5897/JETR2016.0593[Article Number: E76F83E61699]
The study estimated the amount of energy required for grinding palm kernel shell and groundnut shell using laboratory hammer mill and also characterize their ground physical properties. The material type and hammer mill screen aperture significantly influenced the energy requirement for grinding the two materials. For a given screen aperture size, groundnut shell consumed more energy than palm kernel shell. The energy... Read more.
DOI: 10.5897/JETR2016.0596[Article Number: F5A4D0C60151]
Electrostatic oiler are made as the research object, the multiple field spray characteristics of air flow field, electric field and discrete fog field in the process of spraying were analyzed. The influence of electrostatic spray deposition characteristics has been studied by changing the electrostatic voltage and electrode gap. The experiment about electrostatic oil spray has been verified. The results show that... Read more.
DOI: 10.5897/JETR2015.0575[Article Number: 6E972E758250]
Acoustic emissions (AE) generated by a structure under stressed condition provide a passive method to understand the flaw growth phenomenon. In complex structures, such as composites, characterisation of AE signals generated by various failure mechanisms enhances such understanding. Sample level tests have been carried out on carbon epoxy unidirectional laminate in longitudinal direction of fiber to study the AE... Read more.
DOI: 10.5897/JETR2015.0579[Article Number: A3D58BF57892]
In the last years, the distribution of spatial and non-spatial data on the internet plays a crucial role in national development. It facilitates communication between administration, decision-makers and citizens for urban management. In order to encourage the sharing and disseminating of data, the present study aims to develop and implement WebGIS framework for urban management, which offer possibilities to access the... Read more.
DOI: 10.5897/JETR2016.0584[Article Number: 42C848E57619]
The study of catalysts enables the catalyst scientist to identify and understand the important steps such as active sites and stages in a catalysts’ lifetime. It is thus possible for scientists to design in more rational way, new and efficient catalysts. Therefore, the aim of this study was characterization of copper/micelle templated silica-3-aminopropyltrimethoxysilane (Cu/MTS-AMP) catalyst and study of kinetic... Read more.
DOI: 10.5897/JETR2014.0415[Article Number: BC81B7A54729]
In many engineering applications, either the suppression or the enhancement of dehumidification is desired. If so, the dehydration in air-conditioned space can be solved, less condensation water pollution can be achieved, or the dehumidification process can be more efficient. In this study, the effects of various surface treatments were explored to enhance or suppress the condensation. It was found that optical... Read more.
DOI: 10.5897/JETR2015.0545[Article Number: 2229DA854095]
This paper deals with cement production optimization modeling using Particle Swarm Optimization (PSO) and the results was compared with Genetic Algorithm (GA) and Pattern Search (PS). This optimization modeling took into account mixtures of primary fuel (mineral coal, pet-coke and heavy oil) and its alternative fuel which is agricultural waste (rice husk, sugar waste and ground shell). The optimization simulation models... Read more.
DOI: 10.5897/JETR2014.0533[Article Number: 388AD2051679]
This manuscript studies the problem of the wastewater influence on groundwater chemistry, particularly the microbiological quality setting and risk to public health in an urban environment, in an arid climate. The study of the spatial and temporal variation in the chemical and microbiological composition of Béchar city groundwater identifies the impact intensity that directly affects its quality. Microbiological... Read more.
DOI: 10.5897/JETR2014.0531[Article Number: D33AE7050699]
Safe operation of elements of power systems plays a crucial role in maintaining the reliability and safety of the system. Transformers being a key element in power systems need to be maintained and monitored on a regular basis. Dissolved gas analysis has been used as a reliable tool in maintaining the safe operation of transformers for a long time. Analysis of dissolved gases is analytical and often interpreted... Read more.
[Article Number: 125088849699]
Considered a crucial industrial development in the 21st century, the Internet has had a marked effect in shaping modern society. The ongoing development of handheld mobile Internet devices has enabled services in the virtual world to be updated constantly, thereby providing numerous options regarding the virtual network interactions and activities of Internet users. Among the various virtual network activities, people... Read more.
[Article Number: E195CAA49702]
A detailed study of some physical properties of Polyimide films after exposing them to oxygen plasma is presented. The structure of the sample has been analyzed by X-ray diffraction technique (XRD) and is found to be semi crystalline. Thermogravimetric Analysis (TGA) studies revealed that the thermal stability of polyimide films have improved after being exposed to oxygen plasma, at different time intervals, ranging... Read more.
[Article Number: 08795B549703]
In this paper, characterizations of pure major catechins and method for determination of total catechins in green tea leaves have been reported using UV-visible spectrometer. Most research activities have been focused on chromatographic methods, however spectrophotometirc method is preferred because of its rapidity, high accuracy, and reproducibility. The optical transition properties of Epigallocatechin Gallate (EGCG)... Read more.
DOI: 10.5897/JETR2014.0524[Article Number: 839CF2948824]
Suspended sediment concentration estimation has a major influence on river basin planning and management. Prediction of such parameter with artificial neural network (ANN) has shown its performance, because of this, Back Propagation Neural Network model trained with particle swarm optimization (PSO) is used to forecast the daily sediment concentration for Ksob river, Tebessa using 22 years data set from Morsott gauging... Read more.
DOI: 10.5897/JETR2014.0369[Article Number: B1CA67748831]
Today, due to the development of distribution systems and increase of demand and load, the use of the source of scattered production has developed. The establishment of the installation place and the size of the source of scattered production decrease network loss, lead to best action of network as well as the recovery of the voltage profile. In this article, we use the genetic algorithm for relocating and finding the... Read more.
DOI: 10.5897/JETR2014.0526[Article Number: 0D215C748833]
The term Geothermal originates from two Greek words 'GEO' and 'THERM'. The Greek word ‘geo’ means the earth whilst their word for ‘therm’ means heat from the earth. Geothermal energy is energy derived from the heat of the earth. The earth’s centre is a distance of approximately 4000 miles and is so hot that it is molten. Temperatures are understood to be at least 5000°C.... Read more.
DOI: 10.5897/JETR2014.0382[Article Number: 887FD9648279]
Optimization of flux cored arc welding (FCAW) process parameters were carried out to obtain optimum weld bead geometry in mild steel plates of IS 2062 by using an alternate Taguchi method. Design of experiments based on multi-objective Taguchi approach was employed for development of mathematical model correlating important process parameters like welding voltage (V), welding current (I), stick out (N) and wire speed... Read more.
Page 1 of 9, showing 20 records out of 173 total, starting on record 1, ending on 20