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السجلات المعروضة 841 -- 850 من 910
Ultra-low Pt-decorated NiCu bimetallic alloys nanoparticles supported on reduced graphene oxide for electro-oxidation of methanol
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Cambridge University Press
, 2018 , Article)
The selectivity of catalyst is an essential factor in direct methanol fuel cells (DMFCs) and plays an important role to improve their performance. To this end, platinum (Pt)-based low-cost trimetallic catalysts have been ...
Short-term greenhouse emission lowering effect of biochars from solid organic municipal wastes
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Center for Environmental and Energy Research and Studies
, 2018 , Article)
Qatar economy has been growing rapidly during the last two decades during which waste generation and greenhouse gas emissions increased exponentially making them among the main environmental challenges facing the country. ...
A regularization approach to MSE analysis of OFDM under phase noise
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Elsevier
, 2018 , Article)
Orthogonal frequency division multiplexing (OFDM) is widely used in broadband wireless communications systems because of its high resilience to frequency-selective fading and its low implementation complexity. Phase noise ...
دور المساعي الحميدة والوساطة في تسوية الأزمة الخليجية 2017
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وزارة العدل-قطر
, 2018 , Article)
تلعب المساعي الحميدة والوساطة دوراً بارزاً في الوقت الراهن في تسوية العديد من المنازعات الدولية القائمة بالطرق السلمية، خاصة في ظل النزاعات القائمة بين العديد من الدول التي تجمعها تقارب جغرافي وديني وعرقي وأثني، كما هو ...
Secondary users selection and sparse narrow-band interference mitigation in cognitive radio networks
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Elsevier B.V.
, 2018 , Article)
Spectrum scarcity is a critical problem that may reduce the effectiveness of wireless technologies and services. To address this problem, different spectrum management techniques have been proposed in the literature such ...
Nanoflower-like Yttrium-doped ZnO Photocatalyst for the Degradation of Methylene Blue Dye
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Blackwell Publishing Inc.
, 2018 , Article)
Pure ZnO and Yttrium-doped (Y-doped) ZnO at various mol% with flower-like nanostructures are synthesized by a microwave-assisted sol�gel method, followed by investigating the morphologies, crystal structures, optical ...
Ordered porous metal oxide semiconductors for gas sensing
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Elsevier B.V.
, 2018 , Article)
Among various gas sensing materials, metal oxide semiconductors have shown great potential as resistive type sensors. The ordered porous structural metal oxide semiconductors with well-defined meso- or macro-pores chemically ...
Flexural behavior of basalt fiber reinforced concrete beams with recycled concrete coarse aggregates
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Elsevier Ltd
, 2018 , Article)
This study investigates the effect of using recycled concrete aggregates (RCA) from construction and demolition (C&D) waste combined with basalt macro-fibers (BMF) on the flexural behavior and ultimate capacity of reinforced ...
الموقف البريطاني من الخلافات وحالات الغزو عبر الحدود الأردنية - السعودية 1920-1933م.
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جامعة آل البيت
, 2018 , Article)
يهدف هذا البحثُ إلى تتبٍّع الموقف البريطاني تجاه الغاراتِ المتبادلة بين القبائل على الحدود الأردنية السعودية خلال الفترة 1920-1933م، وذلك من خلال تقييم الإجراءات والجهود التي اضطلعت بها بريطانيا بهدف وقف تلك الغارات،بصفتها ...
Rheological and controlled release properties of hydrogels based on mushroom hyperbranched polysaccharide and xanthan gum
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Elsevier B.V.
, 2018 , Article)
A hyperbranched polysaccharide, coded as TM3a, was extracted from the Pleurotus tuber-regium sclerotia. TM3a was hybridized with xanthan gum (XG) by chemical crosslinking using sodium trimetaphosphate (STMP) to obtain new ...