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السجلات المعروضة 14214 -- 14233 من 49774
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Investigation of the Effect of The Temperature and Magnetization Pattern on Flux Density, Instantaneous Torque, Unbalanced Magnetic Forces of a Surface Inset PMM
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference Paper)Electrical machines utilized in domestic applications such as ceiling fans should have low losses and cost. Permanent magnets are used instead of rotor excitation to reduce losses. Therefore, not only the losses of the ... -
Investigation of the Fouling Mechanisms in the Heat Exchangers of a Hydrotreater
( Qatar University , 2005 , Article)The problem of fouling on heat exchanger surfaces has been one of the major unresolved problems of the hydrotreatment unit at the Homs oil refinery in Syria. In this unit, a feed stream of straight-run naphtha is preheated ... -
Investigation of the genetic structure of Kabyle and Chaouia Algerian populations through the polymorphism of Alu insertion markers
( Taylor and Francis Ltd , 2019 , Article)Background: In Algeria, as in all North Africa, Berbers constitute the old background of the population. Today, Berber speakers account for only ∼ 25% of Algerians. This decline is the product of a complex human settlement ... -
INVESTIGATION OF THE HUMORAL IMMUNE RESPONSES IN SARS-COV-2 INFECTED AND VACCINATED INDIVIDUALS
(06-2 , Master Thesis)Background: Protective and lasting immunity to viral infections or vaccines are usually achieved through the combined actions of both cellular and humoral immune responses. Although there exists clear evidence supporting ... -
Investigation of the hydrogen adsorbed density inside the pores of MOF-5 from path integral grand canonical Monte Carlo at supercritical and subcritical temperature
( Science in China Press , 2016 , Article)We examine the high density limit of the adsorption isotherms of hydrogen on MOF-5. The isotherms are calculated using quantum GCMC simulations over the pressure range: 0–150 atm (1 atm = 1.01325 × 105 Pa) in the subcritical ... -
AN INVESTIGATION OF THE IMPACT OF METACOGNITIVE PROMPTS, AS FACILATED BY THE EFAP-SRL MODEL, ON ACHIEVEMENT ON THE END |OF UNIT MATH TEST AMONG 8th GRADE GIRLS IN QATAR PREPARATORY SCHOOLS.
(2019 , Master Thesis)The aim of the present study is to investigate the impact of using metacognitive prompts as facilitated by the Enhanced Formative Assessment with Self-Regulated Learning (EFAP-SRL) model on students’ achievement on the end ... -
Investigation of the Learning Environment in Higher and Lower Performing "Education for a New Era" Schools
(2010 , Conference Paper)Recently, Qatar established key elements of educational reform including curriculum standards; emphasis on student-centered teaching; charter school establishment; standards-based assessment; English as the language of ... -
Investigation of the mechanical behavior of electroless Ni-P-Ti composite coatings
( American Society of Mechanical Engineers (ASME) , 2020 , Article)To improve the toughness of Ni-P coatings, NiTi superelastic particles were introduced into the Ni-P matrix through the electroless co-depositing of Ni-P and Ti particles and annealing Ni-P-Ti coatings. The mechanical ... -
Investigation of the morphology and properties of the polypropylene/low-density polyethylene/wood powder and the maleic anhydride grafted polypropylene/low-density polyethylene/wood powder polymer blend composites
( SAGE Publications Ltd , 2017 , Article)The properties of polypropylene/low-density polyethylene and maleic anhydride grafted polypropylene/low-density polyethylene blends, and their wood powder composites are compared in this study. The blends contained equal ... -
INVESTIGATION OF THE NUTRITIONAL REQUIREMENTS AND CORRESPONDING CODING GENES OF HYDROCARBON-DEGRADING BACTERIAL STRAINS FOR THE PRODUCTION OF BIOMASS USEFUL IN BIOREMEDIATION OF PETROLEUM POLLUTION
(2015 , Master Thesis)Petroleum-derived contamination events constitute one of the most dominant sources of environmental deterioration in the industrialized countries. Hydrocarbon compounds are recognized as toxic and carcinogenic organic ... -
Investigation of the performance of biocompatible gas hydrate inhibitors via combined experimental and DFT methods
( Academic Press , 2017 , Article)In this work, three ionic liquids (ILs) from the bio-compatible family of choline cations attached to anions of varying hydrophobicity namely: choline acetate (ChOAc), choline bistriflamide (ChNtf2), and choline chloride ... -
Investigation of the physico-mechanical properties of electrospun PVDF/cellulose nanofibers.
( Wiley , 2016 , Article)The electro-activity and mechanical properties of PVDF depends mainly on the b-phase content and degree of crystallinity. In this study, cellulose fibers were used to improve these characteristics. This could be achieved ... -
An investigation of the relationship between cyberbullying, cybervictimization and depression symptoms: A cross sectional study among university students in Qatar
( Public Library of Science , 2021 , Article)Background Cyberbullying is a modern form of bullying that could be practiced electronically or on the internet. It is related to different mental health issues such as depression, which can affect both the cyberbully and ... -
Investigation of the rheological properties of nanosilica-reinforced polyacrylamide/polyethyleneimine gels for wellbore strengthening at high reservoir temperatures
( American Chemical Society , 2019 , Article)Wellbore strengthening has been introduced recently to resolve lost circulation problems by improving the fracture gradient and hence extending the mud window. Polymeric cross-linkable solutions showed outstanding strength ... -
Investigation of the Role of Carbonic Anhydrase in Mineral Formation and Magnesium Incorporation by Bacteria from Qatari Sabkhas and Marine Sediments
(2020 , Master Thesis)Mineral-forming bacteria are of great interest in arid environments specifically. These environments are favorable for enhancing the microbial carbonate deposition that is thought to largely influence the sedimentary ... -
Investigation of the steps involved in the difference of susceptibility of Ephestia kuehniella and Spodoptera littoralis to the Bacillus thuringiensis Vip3Aa16 toxin
( Elsevier , 2011 , Article)BUPM95 is a Bacillus thuringiensis subsp. kurstaki strain producing the Vip3Aa16 toxin with an interesting insecticidal activity against the Lepidopteran larvae Ephestia kuehniella. Study of different steps in the mode of ... -
Investigation of the structural, optical and gas sensing properties of PANI coated Cu-ZnS microsphere composite
( Royal Society of Chemistry , 2020 , Article)Polyaniline (PANI)/Cu-ZnS composites with porous microspheres are prepared by a hydrothermal and in situ polymerization method. The structural, optical, and morphological properties are characterized by X-ray powder ... -
Investigation of the Suitability of the Vibration Acceptance Criteria for Process Pipework in Assessing the Vibration Levels of the Flow-Induced Fatigue Failure
(2021 , Master Thesis)Process pipework is essential to the oil and gas industries. Usually, pipework is designed to satisfy static requirements. Often, vibration problems in process pipework are treated on an Adhoc basis. Pipework vibration can ... -
Investigation of the temperature-relatedwear performance of hard nanostructured coatings deposited on a s600 high speed steel
( MDPI AG , 2019 , Article)Thin hard coatings are widely known as key elements in many industrial fields, from equipment for metal machining to dental implants and orthopedic prosthesis. When it comes to machining and cutting tools, thin hard coatings ... -
Investigation of the tribological and biomechanical properties of CrAlTiN and CrN/NbN coatings on SST 304
( Elsevier Ltd , 2017 , Article)This study examines the influence of thin layer coatings of CrAlTiN and CrN/NbN, deposited via physical vapor, on the biocompatibility, mechanical, tribological, and corrosion properties of stainless steel 304. The ...
