Browsing Mathematics, Statistics & Physics by Title

Now showing items 364-383 of 675

    • Location charts based on ranked set sampling for normal and non-normal processes 

      Abbasi S.A. ( John Wiley and Sons Ltd , 2019 , Article)
      Control charts, based on ranked set sampling schemes, had been proposed recently for efficient monitoring of process location. All the proposals in the literature are based on the ideal assumption of normally distributed ...

    • Logarithmic Bounds for Oscillatory Singular Integrals on Hardy Spaces 

      Al-Qassem, Hussain; Cheng, Leslie; Pan, Yibiao ( Hindawi Publishing Corporation , 2016 , Article)
      We establish a logarithmic bound for oscillatory singular integrals with quadratic phases on the Hardy space H 1 (R n). The logarithmic rate of growth is the best possible. 2016 Hussain Al-Qassem et al.

    • Long-term COVID-19 booster effectiveness by infection history and clinical vulnerability and immune imprinting: a retrospective population-based cohort study 

      Hiam, Chemaitelly; Ayoub, Houssein H; Tang, Patrick; Coyle, Peter; Yassine, Hadi M; ... more authors ( Elsevier , 2023 , Article)
      BackgroundLong-term effectiveness of COVID-19 mRNA boosters in populations with different previous infection histories and clinical vulnerability profiles is inadequately understood. We aimed to investigate the effectiveness ...

    • LQ (optimal) control of hyperbolic PDAEs 

      Moghadam, A.A.; Aksikas, I.; Dubljevic, S.; Forbes, J.F. ( Taylor and Francis Ltd. , 2014 , Article)
      The linear quadratic control synthesis for a set of coupled first-order hyperbolic partial differential and algebraic equations is presented by using the infinite-dimensional Hilbert state-space representation of the system ...

    • A Magnetic Transport Middle Eastern Positron Beam 

      Al-Qaradawi, I.Y.; Britton, D.T.; Rajaraman, R.; Abdulmalik, D. ( Elsevier , 2008 , Article)
      A magnetically guided slow positron beam is being constructed at Qatar University and is currently being optimised for regular operation. This is the first positron beam in the Middle East, as well as being the first Arabic ...

    • Majorana fermions in a box 

      Al-Hashimi, M.?H.; Shalaby, A.?M.; Wiese, U.-J. ( American Physical Society , 2017 , Article)
      Motivated by potential applications to ultracold matter, we perform a theoretical study of Majorana fermions confined to a finite volume, whose boundary conditions are characterized by self-adjoint extension parameters. ...

    • Mass problems and density 

      Binns, Stephen; Shore, Richard A.; Simpson, Stephen G. ( World Scientific Publishing Co. Pte Ltd , 2016 , Article)
      Recall that Ew is the lattice of Muchnik degrees of nonempty effectively compact sets in Euclidean space. We solve a long-standing open problem by proving that Ew is dense, i.e. satisfies {equation presented}. Our proof ...

    • Mathematical modeling of the SARSCoV-2 epidemic in Qatar and its impact on the national response to COVID-19 

      Ayoub, Houssein H.; Chemaitelly, Hiam; Seedat, Shaheen; Makhoul, Monia; Kanaani, Zaina Al; ... more authors ( University of Edinburgh , 2021 , Article)
      Background Mathematical modeling constitutes an important tool for planning robust responses to epidemics. This study was conducted to guide the Qatari national response to the severe acute respiratory syndrome coronavirus ...

    • The mathematical theory of finite and infinite dimensional topological spaces and its relevance to quantum gravity 

      Marek-Crnjac, L.; Iovane, G.; Nada, S.I.; Zhong, Ting ( Elsevier Ltd , 2009 , Article)
      The present work gives first a review of the mathematical theory of finite and infinite dimensional topological spaces. Subsequently we connect the discussion with E-infinity theory and the theory of partially ordered sets. ...

    • Maximum Likelihood Estimation in the Inverse Weibull Distribution with Type II Censored Data 

      Alshaikh, Fatima A.; Baklizi, Ayman ( Horizon Research Publishing , 2022 , Article)
      We consider maximum likelihood estimation for the parameters and certain functions of the parameters in the Inverse Weibull (IW) distribution based on type II censored data. The functions under consideration are the Mean ...

    • Measurements of the talus in the assessment of population affinity 

      Bidmos, M.; Bidmos, Mubarak A.; Dayal, Manisha R.; Adegboye, Oyelola A. ( Elsevier Ltd , 2018 , Article)
      © 2018 Elsevier B.V. As part of their routine work, forensic anthropologists are expected to report population affinity as part of the biological profile of an individual. The skull is the most widely used bone for the ...

    • Measuring skewness: We do not assume much 

      Khan, A.A.; Cheema, S.A.; Hussain, Z.; Abdel-Salam, G.A. ( Sharif University of Technology , 2021 , Article)
      Since skewness plays a vital role in different engineering phenomena, its accurate measurement gains significance. Several measures have been taken to quantify the extent of skewness in distributions over the years, but ...

    • Measuring the fall of antihydrogen: The AEGIS experiment at CERN 

      Doser, M.; Allkofer, Y.; Amsler, C.; Belov, A. S.; Bonomi, G.; ... more authors ( Elsevier B.V. , 2011 , Conference Paper)
      Considerable efforts have been made and are still being made to verify the validity of the principle of the equivalence of gravitational and inertial mass, one of the cornerstones of the classical theory of general relativity. ...

    • Metal/Metal-Oxide Nanoclusters for Gas Sensor Applications 

      Ayesh, Ahmad I. ( Hindawi Publishing Corporation , 2016 , Article Review)
      The development of gas sensors that are based on metal/metal-oxide nanoclusters has attracted intensive research interest in the last years. Nanoclusters are suitable candidates for gas sensor applications because of their ...

    • Microscale Thermal Energy Transfer Over a Combined System of Thin Films: Analytical Approach 

      Yilbas B.S.; Alassar R.S.M.; Mansoor S.B.; Al-Dweik A.Y. ( Taylor and Francis Inc. , 2019 , Article)
      An analytical approach for the solution of the equation for phonon transport is presented for the combination thin films system. The transient phonon radiative transport model is considered and the combination of the silicon ...

    • Microstructure of heat-treated steel probed by positron annihilation 

      Al-Qaradawi, I. Y.; Abdel-Hady, E. E.; Megahed, H. (2001 , Conference Paper)
      Positron annihilation lifetime technique has been applied to study the microstructure change in steel after heat treatment. For this purpose, the specimens are heat treated in various manners; normalizing, annealing, ...

    • Mixed EWMA-CUSUM and mixed CUSUM-EWMA modified control charts for monitoring first order autoregressive processes 

      Osei-Aning, Richard; Abbasi, Saddam Akber; Riaz, Muhammad ( Taylor and Francis Ltd. , 2017 , Article)
      In practice most processes are known to produce autocorrelated observations. Autocorrelation degrades the performance of control charts by producing frequent false alarms when the process is stable or makes the charts ...

    • Model for oscillations in the guidance of ions through insulating nanocapillaries 

      Pokhil, G.; Merabet, H.; Stolterfoht, N. ( IOP Publishing , 2011 , Conference Paper)
      The pre-equilibrium period of the ion guiding through insulating nanocapillaries is characterized by the production of temporary charge patches inside the capillaries. The dynamics of the charge patch creation is revealed ...

    • Model predictive control of selective catalytic reduction in diesel-powered vehicles 

      Pakravesh, Hallas; Dubljevic, Stevan; Hayes, Robert E.; Forbes, J. Fraser; Aksikas, Ilyasse ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)
      This paper proposes a method to synthesize an optimal controller for the SCR section of the diesel exhaust after-treatment system, which is based on a system model consisting of coupled hyperbolic and parabolic partial ...

    • Model robust profile monitoring for the generalized linear mixed model for Phase I analysis 

      Bandara, Keerthi; Abdel-Salam, Abdel-Salam G.; Birch, Jeffrey B. ( John Wiley and Sons Ltd , 2020 , Conference Paper)
      The generalized linear mixed model (GLMM) becomes very popular in profile monitoring, especially when the production processes follow nonnormal distribution. In most of the real-life applications in industry, medicine, ...