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70 results for “volume change”
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Research ArticleOpen accessIn the abstractInvestigating the Role of Fly Ash and Silica Fume in the Cement Hydration ProcessLucas Suarez, Taher M. Abu-Lebdeh, Miguel Picornell, Sameer A. HamoushThis research work investigates the effect of fly ash and silica fume on cement paste hydration. Percentages of each additive were selected to replace the cement by volume to be studied at five different ages using water curing and vacuum curing. These percentages were compared alongside a controlled cement paste without additives. Testing was carried out on 350 samples. Analysis … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 1 · 12 Mar 2016 · 8,640 accessesView PDFCite
Research ArticleOpen accessIn the abstractInfiltration of Nanoparticles into Porous Binder Jet Printed PartsAmelia Elliott, Sarah AlSalihi, Abbey L. Merriman, Mufeed M. BastiThe densification of parts that are produced by binder jetting Additive Manufacturing (AM; a.k.a. “3D Printing”) is an essential step in making them mechanically useful. Increasing the packing factor of the powder bed by incorporating nanoparticles into the binder has potential to alleviate the amount of shrinkage needed for full densification of binder jet parts. In this study we present … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 1 · 11 Mar 2016 · 13,395 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessing of the Competitiveness Level in the Industry using the Correlation Analysis on the Example of Agriculture of the Republic of Tatarstan, Russian FederationSvetlana Fanilevna Khasanova, Aigyl Ilshatovna FazullinaThis study presents the results of evaluation of the competitiveness of farmers and the agricultural sector in the region as a whole. Traditional approach of estimating monopolization level uses Herfindahl-Hirshman and Lerner indexes. But this methods not applicable in case of inhomogeneity of product in industry or when firms manufacture different type of products. The evaluation was performed by using … …American Journal of Agricultural and Biological Sciences, Vol. 10, Issue 1 · 26 Mar 2015 · 7,467 accessesView PDFCite
Research ArticleOpen accessIn the abstractABSENCE OF VISIBLE TOXIC EFFECTS ACCOMPANYING THE SHORT-TERM ADMINISTRATION OF AN AQUEOUS EXTRACT OF ALLIUM SATIVA LINN. IN MALE SPRAGUE-DAWLEY RATSJ. Asiedu-Gyekye Isaac, Awortwe Charles, A. Antwi DanielAllium sativum is cultivated in the northern part of Ghana and has gained widespread use as chemoprotective, in curing hypertension, impotence and erectile dysfunction. The multipurpose use together with its aphrodisiac activity has resulted in the widespread use of this plant medicine both in meals and as herbal medications. Safety assessment of this plant however is rare. The present study … …American Journal of Pharmacology and Toxicology, Vol. 9, Issue 1 · 30 Jan 2014 · 7,577 accessesView PDFCite
Research ArticleOpen accessIn the abstractIntegrating Sustainability into Teaching and Research at the University of the South Pacific to Enhance Capacity for the Sustainable Development of Pacific Island CountriesKanayathu C. Koshy, Aliti Koroi, Neil Netaf, Cresantia Koya-Vaka'utaProblem statement: Pacific Island countries have been recognised globally as a ‘special case for environment and Sustainable Development (SD)’ because of their extreme vulnerability to a host of both external and internal development challenges such as: Narrow range of resources, high population density, limited export volume, impacts of climate change and natural disasters, trade, ICT and globalisation pressures. As part … …Journal of Social Sciences, Vol. 7, Issue 1 · 18 Dec 2010 · 9,235 accessesView PDFCite
Research ArticleOpen accessIn the abstractModified Center Interpolation Net for Classification of Composite Structures Tested Using Low Frequency Electronic TappingMahmoud Z. IskandaraniProblem statement: Most exhaustive NDT techniques require large capital equipment, are difficult to apply to complex geometric structures and, above all, are time-consuming to use and some take a considerable time to complete. As a solution to the problems associated with NDT applications, there is a need to establish an intelligent analysis system that supports a portable testing environment, which … …American Journal of Applied Sciences, Vol. 7, Issue 2 · 28 Feb 2010 · 7,108 accessesView PDFCite
Research ArticleOpen accessIn the abstractMeasurements and Model Calibration of Urban Traffic Noise PollutionN. Al-Mutairi, F. Al-Rukaibi, P. KoushkiProblem statement: The problem of urban traffic noise pollution is universal and in the past few decades it has grown to the point that it has become a major concern for both the public and the policy-makers. Approach: In a comprehensive 18 month research project, traffic-generated noise was monitored at 47 roadway locations in fourteen districts in metropolitan Kuwait in … …American Journal of Environmental Sciences, Vol. 5, Issue 5 · 31 Oct 2009 · 7,622 accessesView PDFCite
Research ArticleOpen accessIn the abstractAdsorption of Methylene Blue from Aqueous Solution onto a Low-Cost Natural Jordanian TripoliAtef S. ALzaydienProblem statement: It is well documented that lead is one of contaminants of industrial wastewaters and its pollution exists in the wastewater of many industries. As a result, recent research has focused on the development of cost effective alternatives using various natural sources and industrial wastes. In this setting, the use of low-cost agricultural materials, waste and residues for recovering … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 7,945 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Evaporator Section Lengths and Working Fluids on Operational Limit of Closed Loop Oscillating Heat Pipes with Check Valves (CLOHP/CV)P. Meena, S. Rittidech, P. TammasaengThis research aims to the effect of evaporator section lengths and working fluids on operational limit of closed loop oscillating heat pipes with check valves (CLOHP/CV) with R123 Ethanol and Water were used as the working fluids. A set of CLOHP/CV was made of copper tubes in combination of following dimension: 1.77 mm inside diameter: 10 turns: 5, 10 and … …American Journal of Applied Sciences, Vol. 6, Issue 1 · 31 Jan 2009 · 7,776 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of Heat Transport in a Proton Exchange Membrane (PEM) Fuel CellE. Afshari, S.A. JazayeriIn this study a two-phases, single-domain and non-isothermal model of a Proton Exchange Membrane (PEM) fuel cell has been studied to investigate thermal management effects on fuel cell performance. A set of governing equations, conservation of mass, momentum, species, energy and charge for gas diffusion layers, catalyst layers and the membrane regions are considered. These equations are solved numerically in … …American Journal of Applied Sciences, Vol. 6, Issue 1 · 31 Jan 2009 · 7,342 accessesView PDFCite