Academic: Recent submissions
Now showing items 541-560 of 28030
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Superhydrophobic and corrosion behavior of electrospun PVDF-ZnO coating
( Electrochemical Society Inc. , 2014 , Conference Paper)Corrosion is of considerable concern whenever metals and alloys are used in constructions, petroleum and gas pipelines. The present article was undertaken to investigate the hydrophobicity and corrosion resistance of PVDF ... -
Iron--Based Catalysts for Fischer-Tropsch Synthesis for Light Olefins Production from Syngas
( CRC Press , 2024 , Book chapter)Catalytic conversion of syngas (a mixture of hydrogen and carbon monoxide) into valuable hydrocarbon products, particularly light olefins (C2=-C4=), holds significant importance in the realm of sustainable and clean energy ... -
Non-covalent functionalization of surfactant-assisted graphene oxide with silver nanocomposites for highly efficient photocatalysis and anti-biofilm applications
( Elsevier , 2024 , Article)This study presents a comprehensive investigation on the synthesis and characterization of surfactant-assisted graphene oxide non-covalent functionalized silver nanocomposites (rGS-AgNPs) for achieving remarkable photocatalytic ... -
Electrochemical Investigation of C-Steel Corrosion Inhibition, In Silico, and Sulfate-Reducing Bacteria Investigations Using Pyrazole Derivatives
( American Chemical Society , 2023 , Article)The inhibitory impact of the two synthesized pyrazole derivatives (3 and 4) toward metallic and microbial corrosion was investigated. Using open circuit potential, potentiodynamic polarization, and electrochemical impedance ... -
Failure analysis of 316L air cooler stainless steel tube in a natural gas production field
( Elsevier , 2015 , Article)In spite of the excellent resistance of stainless steel (SS) towards uniform corrosion, overcoming various localized corrosion could be a real challenge. This work presents an analysis of the failure behavior of 316L SS ... -
هُويَّة الذات الافتراضية وعلاقتها بتقدير الذات لدى طلاب الجامعةِ في ظل جائحةِ كورونا
( Qatar University Press , 2024 , Article)هدفت الدراسةُ إلى التحقُّق من البنية والمصداقية لمقياس هوية الذات الافتراضية في علاقتها بتقدير الذات لدى طلاب الجامعة في ظل جائحة كورونا في المجتمع العربي. اختيرت عينة متاحةٌ للدراسة، وتكونت من 243 طالبًا وطالبة من طلاب ... -
مستوى مشاركة أولياء أمور التلاميذ ذوي الإعاقةِ العقلية في إعداد البرنامج التربوي الفردي في المملكةِ العربية السعودية - دراسةٌ نوعية
( Qatar University Press , 2024 , Article)هدفت هذه الدراسةُ إلى التحقُّق من مستوى مشاركة أولياء أمور التلاميذ ذوي الإعاقة العقلية في البرنامج التربوي الفردي، ومعوقات هذه الشراكة. طَبَّقت هذه الدراسة المنهج الوصفيَّ النوعيَّ الذي يساعد الباحث في الوصول إلى مشكلة ... -
تصوُّراتُ المعلمين حول كفاءتِهم الذاتيةِ في التَّعليم عن بُعدٍ وعلاقتُها بممارساتِهم التدريسية في الفصولِ الافتراضية بسَلطنةِ عُمان
( Qatar University Press , 2024 , Article)هدفت الدراسةُ إلى التعرُّف على تصورات المعلمين حول كفاءتهم الذاتية في التعليم عن بعد، وعلاقتها بممارساتهم التدريسية في الفصول الافتراضية. ولتحقيق أهداف الدراسة أعدَّ الباحثون مقياسًا لتصورات المعلمين، وبطاقة ملاحظة للممارسات ... -
الكفاياتُ اللازمة في تكنولوجيا المعلومات والاتصالات لمعلم مراحلِ التعليمِ العام بمدارس دَولةِ قطر من وجهةِ نظر معلِّمِ الحاسوب
( Qatar University Press , 2024 , Article)هدفت الدراسةُ الاستطلاعية إلى التعرُّف على أهم الكفايات اللازمة في تكنولوجيا المعلومات والاتصالات ICT التي يجب أن تتوفر لدى معلم مراحل التعليم العام بمدارس دولة قطر من وجهة نظر معلمي الحاسوب بهذه المراحل، وعلى أثر المتغيرات ... -
Quality of experience for spatial cognitive systems within multiple antenna scenarios
( IEEE , 2013 , Article)Multiple Input Multiple Output (MIMO) adds a new dimension, the spatial one, to be optimized in Cognitive Radio (CR) by offering service simultaneously to more than one user. In this paper, statistical optimization techniques ... -
Power consumption in spatial cognition
( wiley , 2013 , Article)Multiple input multiple output adds a new dimension to be exploited in cognitive radio by simultaneously serving several users. The spatial domain that is added through multiple input multiple output is another system ... -
Energy optimization in multiuser quantized feedback systems
( Springer Nature , 2013 , Article)This article explores the effects of quantization of feedback information on energy consumption in multiuser wireless communication systems. In order to optimize the energy consumption of the system, the article concentrates ... -
A novel energy saving MIMO mechanism in LTE systems
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference Paper)Long Term Evolution (LTE) supports closed-loop MIMO techniques to improve its performance, but in order to exploit multiuser MIMO channel capabilities, the design of an efficient MAC scheme that supports Multiuser MIMO is ... -
Can dynamic pricing make femto users and service providers happy?
( IEEE Computer Society , 2013 , Conference Paper)Femtocell is a promising technology that will improve wireless resources efficiency through frequency spatial reuse however, its integration with the current cellular systems has been considered a fundamental challenge. ... -
Energy optimization in unsynchronized TDD systems for joint uplink downlink scheduling
( IEEE , 2013 , Conference Paper)Energy is an important resource in wireless communications systems that has to be optimized in order to guarantee low interference in the network as well as efficient use of the available resources. One of the prominent ... -
Energy efficient techniques for 802.11n multiuser MAC WLANs
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference Paper)In this paper we evaluate the energy efficiency of MIMO technologies introduced in the emerging IEEE 802.11n standard for infrastructure based WLANs. The main focus is on exploiting multiuser capabilities of MIMO technologies, ... -
Grassmannian beamforming for Coordinated Multipoint transmission in multicell systems
( IEEE Computer Society , 2013 , Conference Paper)Wireless communications suffer from the problem of interference, where undesired signals reach the destination and cause its performance to degrade. Several mechanisms have been proposed over the last years to mitigate the ... -
Green handover with a hybrid satisfaction mechanism
( IEEE Computer Society , 2013 , Conference Paper)Green communications have emerged as one of the most important trends in wireless communications because of its several advantages of interference reduction, battery life increase and electrical bill cut. Its application ... -
Enhanced service delivery for cognitive systems within multiple antenna scenarios
( IEEE Computer Society , 2013 , Conference Paper)Multiple Input Multiple Output (MIMO) is a well established technology that when jointly considered with Cognitive Radio (CR) it will create interactions that need to be optimized. The capability to provide service to more ... -
Opportunistic bi-directional scheduling under quality of experience demands
( Association for Computing Machinery , 2013 , Conference Paper)Quality of Experience (QoE) is a very important metric in wireless communication systems, where customers request strict QoE demands that translate into restrictions on both Uplink (UL) and Downlink (DL) connections. The ...
