Now showing items 19081-19100 of 44358

    • R-wave detection: A comparative analysis of four methods using newborn piglet ECG 

      Shiying, D.; Fangfei, X.; Lingwood, B.; Mesbah, M.; Boashash, B. ( IEEE , 2010 , Conference Paper)
      In the electrocardiograph (ECG), R-wave is the positive upward deflection in the QRS complex which represents the depolarization of both left and right ventricles. Accurate detection of the R-wave peaks in the ECG plays a ...
    • Race/ethnicity and challenges for optimal insulin therapy 

      Nayla Cristina, do Vale Moreira; Ceriello, Antonio; Basit, Abdul; Balde, Naby; Mohan, V.; ... more authors ( Elsevier , 2021 , Article)
      AimsWe aimed to review insulin dosing recommendations, insulin regulation and its determinants, glycaemic response to carbohydrates, and the efficacy and safety of insulin therapy in different races/ethnicities. MethodsWe ...
    • Racing for COVID-19 Vaccine and Cure: Lessons and Tragedies in Human Subject Research. 

      Salam, Amar M; Carr, Alison S ( Medknow Publications , 2020 , Article)
      Pressured by the enormous human and economic costs of the COVID-19 pandemic, certain countries and political figures have advocated the use of drugs and vaccines that did not go through the required regulatory stages of ...
    • Radar fall detection using principal component analysis 

      Jokanovic, Branka; Amin, Moeness; Ahmad, Fauzia; Boashash, B. ( SPIE , 2016 , Conference Paper)
      Falls are a major cause of fatal and nonfatal injuries in people aged 65 years and older. Radar has the potential to become one of the leading technologies for fall detection, thereby enabling the elderly to live independently. ...
    • Radar fall detectors: A comparison 

      Erol, Baris; Amin, Moeness; Ahmad, Fauzia; Boashash, B. ( SPIE , 2016 , Conference Paper)
      Falls are a major cause of accidents in elderly people. Even simple falls can lead to severe injuries, and sometimes result in death. Doppler fall detection has drawn much attention in recent years. Micro-Doppler signatures ...
    • Radially oriented mesoporous TiO2 microspheres with single-crystal–like anatase walls for high-efficiency optoelectronic devices 

      Liu, Yong; Che, Renchao; Chen, Gang; Fan, Jianwei; Sun, Zhenkun; ... more authors ( American Association for the Advancement of Science , 2015 , Article)
      Highly crystalline mesoporous materials with oriented configurations are in demand for high-performance energy conversion devices. We report a simple evaporation-driven oriented assembly method to synthesize three-dimensional ...
    • Radiation-free imaging for distal hole targeting in Intramedullary nailing 

      Abu-Gaoud, Monther Ghafel (2017 , Master Thesis)
      Orthopedic surgeons are routinely faced with long-bone fractures. Their preferred surgical procedure for dealing with such cases is Intra-Medullary Nailing (IMN). The aforementioned surgery usually involves alignment of ...
    • Radioactivity levels in the marine environment along the Exclusive Economic Zone (EEZ) of Qatar 

      Al-Qaradawi, Ilham; Abdel-Moati, Mohamed; Al-Yafei, Mohsin Al-Ansi; Al-Ansari, Ebrahim; Al-Maslamani, Ibrahim; ... more authors ( Elsevier , 2015 , Article)
      A study on 137Cs, 40K, 226Ra, 228Ra, and 238U was carried out along the EEZ of Qatar. Results serve as the first ever baseline data. The level of 137Cs (mean value 1.6 ± 0.4 Bq m 3) in water filters was found to be in the ...
    • Radiofrequency Ablation Versus Antiarrhythmic Drug Therapy for Atrial Fibrillation: Meta-analysis of Safety and Efficacy 

      Yi F.; Hou W.; Zhou C.; Yin Y.; Lu S.; ... more authors ( NLM (Medline) , 2019 , Article)
      BACKGROUND: Radiofrequency ablation (RFA) and antiarrhythmic drugs (AADs) are the main treatments used for atrial fibrillation (AF). In recent years, a number of articles comparing the 2 treatments have begun to emerge. ...
    • Radiographic assessment of endodontic mishaps in an undergraduate student clinic: a 2-year retrospective study 

      Matoug-Elwerfelli, Manal; Abdou, Ahmed; Almutairi, Wejdan; Alhuthayli, Malak; Aloyaynaa, Shaikhah; ... more authors ( PeerJ , 2022 , Article)
      Objectives. The aim of this study was to compare the occurrence of instrumentation and obturation related endodontic procedural mishaps following the use of either, stainless steel hand or engine-driven rotary instrumentation ...
    • Radiological Assessment of Prevalance and Quality of Periapical Status of Endodontic Treatments 

      Aysal, Zeynep; Kocasarac, Husniye Demirturk; Orhan, Kaan; Helvacioglu-Yigi, Dilek ( International Scientific Infromation, Inc. , 2022 , Article)
      Background: The aim of this study was to determine the current prevalence and quality of endodontic treatments and investigate the relationship of various factors with posttreatment endodontic disease (PTED) in a Turkish ...
    • Radiopacity evaluation of calcium silicate cements 

      Sen, Havva Gozde; Helvacioglu-Yigit, Dilek; Yilmaz, Ayca ( BioMed Central , 2023 , Article)
      Background: The aim of this study was to compare the radiopacity of calcium silicate cements using a digital imaging method. Methods: Four calcium silicate cements, NeoMTA 2, OrthoMTA, ProRoot MTA, and Biodentine, were ...
    • Radon concentration determination in some dwellings of Doha city of Qatar 

      Arafa, W.; El-Karadawi, E. ( Elsevier , 1997 , Article)
      Yearly average radon concentrations have not been reported yet in Qatar. Only few measurements on indoor radon concentrations have been conducted during the autumn season in 1992. To complete these measurements a determination ...
    • A radon wigner ville based image dissimilarity measure 

      Saleem, A.; Beghdadi, A.; Chetouani, A.; Boashash, B. ( IEEE , 2011 , Conference Paper)
      In this paper, we introduce a radon wigner ville based image dissimilarity measure. The proposed Image distortion measure aims to combine the useful properties of the wigner ville and the directionality of the finite Radon ...
    • Rail Robot for Rail Track Inspection 

      AlNaimi, Noora Rashid (2020 , Master Thesis)
      Railway transportation requires constant inspections and immediate maintenance to ensure public safety. Traditional manual inspections are not only time consuming, but also expensive. In addition, the accuracy of defect ...
    • Rainfall Change Projections under Different Climate Change Scenarios in UAE 

      Abuzwidah, Muamer; Elawady, Ahmed; Zeiada, Waleed; Al Ali, Rafeeah; Al Samahi, Soughah; ... more authors ( Qatar University Press , 2023 , Conference Paper)
      The increase of greenhouse gases in the atmosphere due to human activities is predicted to have significant and lasting effects on the global climate throughout the 21st century. The resulting warming over the past decades ...
    • Rainfall Characterization In An Arid Area 

      Bazaraa, A. S.; Ahmed, Shamim ( Qatar University , 1991 , Article)
      The objective of this work is to characterize the rainfall in Doha which lies in an arid region. The rainfall data included daily rainfall depth since 1962 and the hyetographs of the individual storms since 1976. The ...
    • Ramadan Fasting and Patients with Cancer: State-of-the-Art and Future Prospects 

      Bragazzi, Nicola Luigi; Briki, Walid; Khabbache, Hicham; Rammouz, Ismail; Chamari, Karim; ... more authors ( Frontiers Media , 2016 , Article)
      Ramadan fasting represents one of the five pillars of the Islam creed. Even though some subjects (among which patients) are exempted from observing this religious duty, they may be eager to share this particular moment of ...
    • Ramadan intermittent fasting induced poorer training practices during the COVID-19 lockdown: A global cross-sectional study with 5529 athletes from 110 countries 

      Washif, Jad; B. Pyne, David; Sandbakk, Oyvind; Trabelsi, Khaled; Aziz, Abdul Rashid; ... more authors ( Institute of Sport , 2022 , Article)
      Ramadan intermittent fasting during the COVID-19 lockdown (RIFL) may present unique demands. We investigated training practices (i.e., training load and training times) of athletes, using pre-defined survey criteria/questions, ...