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Now showing items 6644-6663 of 48376
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Density functional theory study on the catalytic dehydrogenation of methane on MoO3 (010) surface
( Elsevier , 2022 , Article)Methane conversion offers hydrocarbon building blocks of high market value, which are easier to transport than natural gas. Under non-oxidative conditions, the process can also produce clean hydrogen fuel. In this study, ... -
Density manifolds, geometric measures and high-energy physics in transfinite dimensions
( Elsevier B.V. , 2009 , Article)We discuss certain manifolds with density. Furthermore, we outline natural connections leading to E-infinity theory and high-energy physics from a geometric measure and transfinite dimensional theoretical viewpoints. -
Density-Functional Theory Investigation of Barite Scale Inhibition Using Phosphonate and Carboxyl-Based Inhibitors
( American Chemical Society , 2020 , Article)Scale deposition is a critical issue in oil and gas exploration and production processes, causing significant blocking in tubing and consequently flow assurance and economic losses. Most studies addressing the scale formation ... -
Dental caries detection using a semi-supervised learning approach
( Nature Research , 2023 , Article)Early diagnosis of dental caries progression can prevent invasive treatment and enable preventive treatment. In this regard, dental radiography is a widely used tool to capture dental visuals that are used for the detection ... -
Dental floss ties for rubber dam isolation: A proposed classification and a new technique.
( Wiley , 2022 , Article)Rubber dam (RD) application has become an essential part of restorative dentistry. In late 2019, dentistry faced a new challenge with the COVID-19 pandemic and therefore, the implementation of extra isolation methods became ... -
Dental implant placement with immersive technologies: A preliminary clinical report of augmented and mixed reality applications
( Elsevier , 2024 , Report)A preliminary clinical report of implant placements with 2 immersive reality technologies is described: augmented reality with head mounted display and mixed reality with a tablet PC. Both immersive realities are promising ... -
Dental students' self-reported confidence level in restorative crown and bridge procedures: A UK quantitative study
( Wiley , 2022 , Article)Introduction: Graduating confident students who can flourish and develop in their future career is an important outcome of dental education. The aim of the study was to gain an insight into students' self-reported level ... -
Dentistry in a multicultural society: the impact of animal-based products on person-centred care
( British Dental Association , 2022 , Article)Cultural competence of healthcare professionals requires a combination of awareness, knowledge and skills to provide healthcare services to culturally and lingually diverse populations. The aim of this paper is to raise ... -
Deoxygenation of pyrolysis vapour derived from durian shell using catalysts prepared from industrial wastes rich in Ca, Fe, Si and Al
( Elsevier B.V. , 2020 , Article)Catalysts prepared from industrial wastes rich in Fe, Ca, Si, and Al were used in catalytic upgrading of pyrolysis vapour derived from durian shell and their effect on product yield and properties were compared. With same ... -
Department of Management and Marketing Research Seminar College of Business and Economics كلية الإدارة
( جامعة قطر , 2015 , Image) -
Department of Special Needs | قسم ذوي الإحتياجات الخاصة
( جامعة قطر , 2013 , Video) -
Dependence of wear behavior on sintering mechanism for Iron-Alumina Metal Matrix Nanocomposites
( Elsevier Ltd , 2018 , Article)The present paper reports the dependence of wear behavior on sintering mechanism for iron (Fe) alumina (Al2O3) metal matrix nanocomposites fabricated via Powder Metallurgy (P/M) technique. Nanocomposite composition was ... -
Deploying partial least squares to investigate the influence of managerial assumptions on corporate social responsibility in the hotel industry
( Emerald Group Publishing Ltd. , 2018 , Article)Purpose: This paper aims to investigate the interplay between managerial assumptions and institutional corporate social responsibility, and determines how such fit affects performance. Design/methodology/approach: The ... -
Depression in migrant workers and nationals of Qatar: An exploratory cross-cultural study
( SAGE Publications , 2019 , Article)Background: The aim of this study was to compare the prevalence of depressive symptoms among migrants and non-migrants living in Qatar and identify variables associated with depressive symptomology in these groups, including ... -
Depression in patients with spinal injury in Qatar: a mixed-methods study
( Qatar University Press , 2021 , Poster)Background: There is a high prevalence of depression in people with spinal injury. It has a major negative influence on health and performance of daily living activities following the injury. Social support plays an important ... -
DEPRESSION SCREENING RATES AND PATTERNS OF MANAGEMENT IN PRIMARY CARE IN QATAR: A CROSS-SECTIONAL STUDY
(06-2 , Master Thesis)Background: Depression is one of the main public health problems and a leading cause of disability. It was estimated in 2019 that depression affects more than 279 million people worldwide. According to World Health ... -
Depression-anxiety in the Adult Population of Qatar during the First Year of COVID-19
( Qatar University Press , 2021 , Poster)There is limited data from Arabic-speaking countries on risk factors for depression and anxiety during the COVID-19 pandemic. Country-specific data is necessary given differences in culture, demographics, and COVID-19 ... -
Deregulation of cell growth and apoptosis in UV-induced melanomagenesis
( Frontiers in Bioscience , 2020 , Article Review)We have previously characterized the role of p16/Rb in coordinating the early events in UVB-irradiated skin. As an extension to this work, normal melanocytes and mutant p16-inducible melanoma cell models were employed to ... -
Derivation of a new Merton's optimal problem presented by fractional stochastic stock price and its applications
( Elsevier Ltd , 2017 , Article)In this article, a new model of Merton's optimal problem is derived. This derivation is based on stock price presented by fractional order stochastic differential equation. An extension of Hamilton-Jacobi-Bellman is used ...