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Now showing items 1081-1089 of 1089
A point symmetry based method for transforming ODEs with three-dimensional symmetry algebras to their canonical forms
(
Elsevier Inc.
, 2016 , Article)
We provide an algorithmic approach to the construction of point transformations for scalar ordinary differential equations that admit three-dimensional symmetry algebras which lead to their respective canonical forms.
Melt processing and properties of linear low density polyethylene-graphene nanoplatelet composites
(
Elsevier Ltd
, 2016 , Article)
Composites of Linear Low Density Polyethylene (LLDPE) and Graphene Nanoplatelets (GNPs) were processed using a twin screw extruder under different extrusion conditions. The effects of screw speed, feeder speed and GNP ...
Inference in simple regression for the intercept utilizing prior information on the slope
(
Wayne State University
, 2011 , Article)
Shrinkage type estimators are developed for the intercept parameter of a simple linear regression model and the case when it is suspected a priori that the slope parameter is equal to some specific value is considered. ...
Microstructural investigation of gamma-irradiated ultra high molecular weight polyethylene in nitrogen atmosphere
(
Trans Tech Publications
, 2010 , Conference Paper)
In this paper the results of structural changes in ultra high molecular polyethylene (UHMWPE) upon gamma irradiation and storage in nitrogen environment are reported. Based on differential scanning calorimetry (DSC), wide ...
Effect of gamma irradiation on the microstructure and morphology of polyethylene oxide and polyvinyl alcohol blends
(
Trans Tech Publications
, 2010 , Conference Paper)
Thin films of a blend of 90, 75, 50 (wt/wt%) percentage of polyethylene oxide and polyvinyl alcohol were synthesized and irradiated with 5, 25, 50, 100 and 200 kGy. The presence of PVA leads to diffusion controlled mechanism ...
Pottery from Halat Aobeer and Hazem Al-Jasrah, Qatar
(
Elsevier
, 2013 , Article)
In this paper the results of investigations on six archaeological ceramic sherds of the most common Islamic earthenware from the site of Halat Aobeer and Hazam Al-Jasrah are presented. The data was obtained by using a ...
Determination of midodrine hydrochloride via Hantzsch condensation reaction: A factorial design based spectrophotometric approach
(
Royal Society of Chemistry
, 2015 , Article)
A set of experimental designs was executed to attain the optimal reaction parameters of chemical derivatization of midodrine hydrochloride (MD·HCl) in oral formulas via a Hantzsch condensation reaction. The process variables, ...
Date palm status and perspective in qatar
(
Springer Netherlands
, 2015 , Article)
Qatar ranks as the 16 largest date-producing country in the world. There are 581,336 date palm trees growing in an area of 2,469 ha with date production of 21,491 mt as of 2010. It is the major fruit tree grown in the ...
Genetic diversity of date palm genotypes in qatar as determined by SSR and ISSR markers
(
International Society for Horticultural Science
, 2010 , Conference Paper)
Date palm is the most important fruit tree in Qatar. Recently developed techniques, based on DNA markers, offer new tools for genetic analysis. The objectives of the present study are to analyze the genetic diversity among ...