Mathematics, Statistics & Physics: Recent submissions
Now showing items 101-120 of 740
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Level sets of potential functions bisecting unbounded quadrilaterals
( Springer Nature , 2022 , Article)We study the mixed Dirichlet–Neumann problem for the Laplace equation in the complement of a bounded convex polygonal quadrilateral in the extended complex plane. The Dirichlet / Neumann conditions at opposite pairs of ... -
Conformal capacity and polycircular domains
( Elsevier , 2023 , Article)We study numerical conformal mapping of multiply connected planar domains with boundaries consisting of unions of finitely many circular arcs, so called polycircular domains. We compute the conformal capacities of condensers ... -
Polycircular domains, numerical conformal mappings, and moduli of quadrilaterals
( Springer Nature , 2022 , Article)We study numerical conformal mappings of planar Jordan domains with boundaries consisting of finitely many circular arcs, also called polycircular domains, and compute the moduli of quadrilaterals for these domains. ... -
A superconducting millimetre switch with multiple nano-bridges
( International Symposium on Space Terahertz Technology , 2014 , Conference Paper)In this paper, we describe the design of a planar superconducting on/off switch comprising a high normal resistance nano-bridge deposited across a slotline transmission line. We present preliminary experimental results ... -
Combined theoretical and experimental study of the transmission of tilted ion beams through macroscopic conical glass capillaries
( IOP Publishing , 2015 , Conference Paper)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 ... -
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 ... -
Ion-impact-induced interatomic Coulombic decay in neon and argon dimers
( American Physical Society , 2013 , Article)We investigate the contribution of interatomic Coulombic decay induced by ion impact in neon and argon dimers (Ne2 and Ar2) to the production of low-energy electrons. Our experiments cover a broad range of perturbation ... -
Orientation dependence in multiple ionization of He 2 and Ne 2 induced by fast, highly charged ions: Probing the impact-parameter-dependent ionization probability in 11.37-MeV/u S 14 + collisions with He and Ne
( American Physical Society , 2014 , Article)We investigate orientation effects in the fragmentation of He2 and Ne2 induced by S14+ projectiles at an impact energy of 11.37 MeV/u. Multiple ionization shows a strong dependence on the orientation of the dimer axis with ... -
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 ... -
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 ... -
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 ... -
Model for oscillations in the guidance of ions through insulating nanocapillaries
( 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 ... -
Ion impact induced ionization/fragmentation dynamics of rare gas Dimers
( IOP Publishing , 2013 , Conference Paper)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. © ... -
Robust adaptive learning control for different classes of dissipative vehicle systems
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference Paper)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 ... -
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, ... -
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 Paper)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 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 Paper)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 ...
