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Now showing items 11-20 of 3265
A new experimental device and inverse method to characterize thermal properties of composite phase change materials
(
Elsevier BV
, 2015 , Article)
A new experimental device has been developed in order to characterize the phase change material (PCM) thermal properties (thermal conductivity k, sensible and latent heat thermal energy storage, cp and Lf) in the solid ...
Poreless Separator and Electrolyte Additive for Lithium-Sulfur Batteries with High Areal Energy Densities
(
WILEY-VCH Verlag
, 2015 , Article)
Despite the attractive theoretical capacity of sulfur over 1600 mA h g−1, lithium–sulfur (Li–S) batteries suffer from insufficient cycle lives mainly due to fatal polysulfide dissolution. This chronic drawback becomes ...
Thermochemical treatment of fly ash for synthesis of mesoporous activated carbon
(
Springer Netherlands
, 2015 , Article)
A mesoporous activated carbon is produced from oil fly ash (OFA) using chemical and thermal treatments at different activation conditions. The ash samples were refluxed with a range of compositions of sulfuric, nitric, and ...
Social Capital and Citizens’ Attitudes towards Migrant Workers
(
Cogitatio Press
, 2017 , Article)
This study examines Qatari citizens’ attitudes toward migrant workers. While much research has been conducted on citizens’ attitudes toward the abolition, tightening, or loosening of the Kafāla system in the Gulf Cooperation ...
Molecular characterization of extended spectrum β -lactamases enterobacteriaceae causing lower urinary tract infection among pediatric population.
(
BioMed Central
, 2018 , Article)
The β-lactam antibiotics have traditionally been the main treatment of Enterobacteriaceae infections, nonetheless, the emergence of species producing β- Lactamases has rendered this class of antibiotics largely ineffective. ...
Antibiotic Resistance Profile of Commensal Escherichia coli Isolated from Broiler Chickens in Qatar.
(
International Association for Food Protection
, 2018 , Article)
Antibiotic resistance (AR) is a growing public health concern worldwide, and it is a top health challenge in the 21st century. AR among Enterobacteriaceae is rapidly increasing, especially in third-generation cephalosporins ...
USE OF EPORTFOLIOS IN K-12 TEACHER HIRING IN NORTH CAROLINA: PERSPECTIVES OF SCHOOL PRINCIPALS
(
Association for Supervision and Curriculum Development
, 2012 , Article)
This study explored the perceptions of principals involved in the hiring process of K–12 teachers in 11 counties in southeastern North Carolina. Forty-nine principals responded to a survey on ePortfolio use in the hiring ...
Interface modification of compatibilized polyethylene terephthalate/polypropylene blends: Effect of compatibilization on thermomechanical properties and thermal stability
(
WILEY-VCH Verlag
, 2015 , Article)
Polyethylene terephthalate (PET) and polypropylene (PP) are incompatible thermoplastics because of differences in chemical structure and polarity, hence their blends possess inferior mechanical and thermal properties. ...
The effect of expanded graphite on the physical properties of conductive EVA/wax phase change blends for thermal energy storage
(
John Wiley & Sons, Ltd.
, 2015 , Article)
A study of the morphology, dynamic mechanical, impact, and tensile properties of ethylene vinyl acetate copolymer (EVA)/expanded graphite (EG) and EVA/wax/EG composites is presented. The composites were prepared by melt ...
Influence of surface modification of carbon nanotubes on interactions with polystyrene-b-polyisoprene-b-polystyrene matrix and its photo-actuation properties
(
John Wiley & Sons, Ltd.
, 2014 , Article)
The influence of various surface modification of multiwalled carbon nanotubes (MWCNT) on preferential interactions with individual phases of the linear triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) and ...