Mathematics, Statistics & Physics: Recent submissions
Now showing items 181-200 of 814
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Atomic-scale and optical investigation of nanostructured Er disilicates in silica
( Elsevier , 2022 , Article)The optical and structural properties of Er-doped Silicon oxide based thin films elaborated by RF magnetron sputtering were investigated as a function of annealing treatment. Atom Probe Tomography and Transmission electron ... -
Ion impact induced ionization/fragmentation dynamics of rare gas Dimers
( IOP Publishing , 2013 , Conference)We have measured the ionization and fragmentation of Helium, Neon and Argon Dimers induced by ion impact and observed two different pathways, the sequential ionization on each atom and the interatomic Cou-lombic decay. © ... -
Model for oscillations in the guidance of ions through insulating nanocapillaries
( IOP Publishing , 2011 , Conference)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 ... -
Comprehensive investigation of Er2O3 thin films grown with different ALD approaches
( Elsevier , 2022 , Article)The effect of Er precursor nature (Er(CpMe)3 or Er(tmhd)3) and annealing treatment at 500–1100 °C on the structural and optical properties of Er2O3 films grown on Si substrates by thermal or O2-plasma-assisted atomic layer ... -
Dynamics of charge evolution in glass capillaries for 230-keV Xe23 + ions
( American Physical Society , 2012 , Article)We have measured the transmission of 230-keV (10-keV/q) Xe23+ ions through insulating tapered glass capillaries of microscopic dimensions. The dynamics of charging and discharging processes have been investigated, evidencing ... -
Combined theoretical and experimental study of the transmission of tilted ion beams through macroscopic conical glass capillaries
( IOP Publishing , 2015 , Conference)The transmission as a function of the tilt angle of a 3 keV Ar+ ion beam through a conical macroscopic glass capillary is studied theoretically and experimentally. It was found that the charge patches which are responsible ... -
Frequency conversion layers for Si solar cell efficiency improvement
( Springer Nature , 2017 , Book chapter)SiNx and SiNx: Tb3+ thin layers deposited by reactive magnetron co-sputtering have been studied with the aim of optimizing the light management in Si solar cells. Those Si-based layers are developed to be compatible with ... -
Estimating protection afforded by prior infection in preventing reinfection: Applying the test-negative study design.
( Oxford University Press , 2023 , Article)The COVID-19 pandemic has highlighted the need to use infection testing databases to rapidly estimate effectiveness of prior infection in preventing reinfection ($P{E}_S$) by novel SARS-CoV-2 variants. Mathematical modeling ... -
OCTUNE: Optimal Control Tuning Using Real-Time Data with Algorithm and Experimental Results
( MDPI , 2022 , Article)Autonomous robots require control tuning to optimize their performance, such as optimal trajectory tracking. Controllers, such as the Proportional–Integral–Derivative (PID) controller, which are commonly used in robots, ... -
Robust stabilization of LTI negative imaginary systems using the nearest negative imaginary controller
( John Wiley and Sons Inc , 2023 , Article)This paper considers the problem of robust stabilization of linear time-invariant systems with respect to unmodelled dynamics and structure uncertainties. To that end, a methodology to find the nearest negative imaginary ... -
Large-Scale Swarm Control in Cluttered Environments
( Springer Science and Business Media Deutschland GmbH , 2024 , Conference)In the evolving era of social robots, managing a swarm of autonomous agents to perform particular tasks has become essential for numerous industries. The task becomes more challenging for large-scale swarms and complex ... -
Koopman Operator Approximation Under Negative Imaginary Constraints
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Article)Nonlinear Negative Imaginary (NI) systems arise in various engineering applications, such as controlling flexible structures and air vehicles. However, unlike linear NI systems, their theory is not well-developed. In this ... -
Finding the Nearest Negative Imaginary System with Application to Near-Optimal Controller Design
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Conference)In this paper, we consider the problem of robust stabilization of linear time-invariant systems with respect to unmodeled dynamics and structure uncertainties. To that end, we first present a methodology to find the nearest ... -
Robust adaptive learning control for different classes of dissipative vehicle systems
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference)This paper presents a methodology that leverages learning techniques and robust control theory to design an adaptive controller for a wide class of linear dynamical dissipative vehicle systems. In particular, learning ... -
On rough maximal operators and Marcinkiewicz integrals along submanifolds
(2009 , Article)We investigate the LP boundedness for a class of parametric Marcinkiewicz integral operators associated to submanifolds and a class of related maximal operators under the L(log L)α(Sn-1) condition on the kernel functions. ... -
On certain estimates for marcinkiewicz integrals and extrapolation
( Universidad de Barcelona , 2009 , Article)We obtain Lp estimates for parametric Marcinkiewicz integrals associated to polynomial mappings and with rough kernels on the unit sphere as well as on the radial direction. These estimates will allow us to use an extrapolation ... -
On certain rough maximal operators and singular integrals
(2007 , Article)We study the L p mapping properties of a class of singular integral operators T p,Ω,h related to polynomial mappings. We prove that this class of singular operators and some of its related maximal operators are bounded on ... -
On the Lp boundedness of rough parametric Marcinkiewicz functions
( Victoria University of Technology , 2007 , Article)In this paper, we study the Lp boundedness of a class of parametric Marcinkiewicz integral operators with rough kernels in L(log + L)(Sn-1). Our result in this paper solves an open problem left by the authors of ([6]). © ... -
Certain estimates of oscillatory integrals and extrapolation
(2010 , Article)In this paper we study the boundedness properties of certain oscillatory integrals with polynomial phase. We obtain sharp estimates for these oscillatory integrals. By the virtue of these estimates and extrapolation we ... -
On certain rough integral operators and extrapolation
( Victoria university , 2009 , Article)In this paper, we obtain sharp Lp estimates of two classes of maximal operators related to rough singular integrals and Marcinkiewicz integrals. These estimates will be used to obtain similar estimates for the related ...
