Browsing Academic by Title
Now showing items 5519-5538 of 25697
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Denial-of-service attack on iec 61850-based substation automation system: A crucial cyber threat towards smart substation pathways
( MDPI , 2021 , Article)The generation of the mix-based expansion of modern power grids has urged the utilization of digital infrastructures. The introduction of Substation Automation Systems (SAS), advanced networks and communication technologies ... -
Denoising different types of acoustic partial discharge signals using power spectral subtraction
( Institution of Engineering and Technology , 2018 , Article)Measuring acoustic emission (AE) of partial discharge (PD) phenomena can be adopted to estimate the condition of power transformers. However, the environmental noise encountered with AE of PD measurements negatively affects ... -
Denoising of acoustic partial discharge signals corrupted with random noise
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)Power transformers are one of the most important and expensive electrical equipment that require online condition monitoring. Partial discharge (PD) measurement is considered the most effective and non-destructive approach ... -
Density and diversity of the desert Arthropoda of Qatar
( Qatar University , 1997 , Article)Density and diversity of arthropods were studied at different habitats of the Qatari desert. Diurnal sampling was conducted at two seasons of the year, the end of the dry season, at the beginning of autumn (October) in ... -
Density Functional Theory Study of Dry Reforming of Methane
(2018 , Master Thesis)the recent years, the global warming effects are being catastrophic and they start hitting new areas. These effects have a direct relation with the amount of greenhouse gases emitted into the atmosphere. CO2 and other ... -
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 ... -
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 ...
