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Published in 2021 at "Mathematische Nachrichten"
DOI: 10.1002/mana.201900273
Abstract: In this paper, we consider the following fractional Kirchhoff equation with critical nonlinearity a+b∫R3(−Δ)s2u2dx(−Δ)su+V(x)u=Q(x)f(u)+|u|2s∗−2u,x∈R3,where a,b>0 , (−Δ)s is the fractional Laplace operator with s∈(34,1) , V vanishes at infinity and 2s∗=63−2s . Under appropriate assumptions…
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Keywords:
kirchhoff equation;
existence positive;
fractional kirchhoff;
infinity ... See more keywords
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Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2021)031
Abstract: Abstract We investigate the asymptotic structure of the free Rarita-Schwinger theory in four spacetime dimensions at spatial infinity in the Hamiltonian formalism. We impose boundary conditions for the spin-3/2 field that are invariant under an…
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Keywords:
rarita schwinger;
structure;
theory;
infinity ... See more keywords
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Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2022)019
Abstract: Abstract Combinatorial quantum gravity is governed by a discrete Einstein-Hilbert action formulated on an ensemble of random graphs. There is strong evidence for a second-order quantum phase transition separating a random phase at strong coupling…
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Keywords:
time;
infinity;
curvature;
dimension ... See more keywords
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Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep09(2018)123
Abstract: A bstractWe give new definitions of null infinity and black hole in terms of causal boundaries, applicable to any strongly causal spacetime (M, g). These are meant to extend the standard ones given in terms…
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Keywords:
notion null;
null infinity;
novel notion;
black hole ... See more keywords
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Published in 2021 at "Foundations of Physics"
DOI: 10.1007/s10701-021-00486-1
Abstract: We study in detail the electromagnetic fields and the Poynting flux in the case of a uniformly accelerated charge, in order to examine whether such a charge does `emit' radiation, especially in view of the…
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Keywords:
poynting flux;
energy;
charge;
accelerated charge ... See more keywords
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Published in 2018 at "International Journal of Dynamics and Control"
DOI: 10.1007/s40435-017-0348-0
Abstract: The article applies nonlinear optimal (H-infinity) control to underactuated robotic systems using as a case study Furuta’s pendulum. The pendulum’s dynamic model is first transformed to an equivalent form after applying partial feedback linearization. The…
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Keywords:
control;
nonlinear infinity;
infinity control;
furuta pendulum ... See more keywords
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Published in 2021 at "International Journal of Dynamics and Control"
DOI: 10.1007/s40435-021-00846-9
Abstract: This paper proposes a novel robust adaptive controller for uncertain nonlinear systems subject to external disturbances. The robust part of the controller is designed by coupling the H-infinity and guaranteed-cost control theories. Besides, the adaptive…
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Keywords:
control;
model reference;
controller;
guaranteed cost ... See more keywords
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Published in 2021 at "Advances in Mathematics"
DOI: 10.1016/j.aim.2020.107526
Abstract: We study the streamlines of $\infty$-harmonic functions in planar convex rings. We include convex polygons. The points where streamlines can meet are characterized: they lie on certain curves. The gradient has constant norm along streamlines…
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Keywords:
infinity;
flow infinity;
gradient flow;
harmonic potentials ... See more keywords
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Published in 2018 at "Physica Medica"
DOI: 10.1016/j.ejmp.2018.06.520
Abstract: Purpose To analyze the total treatment time and waiting time for the patients in our radiation oncology department. Method Patient treatment and waiting times were analyzed for a total of 3937 appointments during the last…
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Keywords:
treatment;
time;
treatment time;
total time ... See more keywords
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Published in 2021 at "Journal of Mathematical Analysis and Applications"
DOI: 10.1016/j.jmaa.2020.124576
Abstract: Abstract We discuss uniqueness of positive radial solutions for a class of singular p-Laplacian problem on the exterior of a ball where the reaction term has infinite semipositone structure and decays to 0 at infinity.…
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Keywords:
class laplacian;
infinity;
class;
reaction term ... See more keywords
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Published in 2017 at "Mechatronics"
DOI: 10.1016/j.mechatronics.2017.04.003
Abstract: ABSTRACT This paper deals with design, performances comparison and experimental validation of H-infinity (H∞) and discrete time RST position controllers for a Traveling Wave Ultrasonic Motor (TWUM) which is dedicated to robotic applications. The proposed…
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Keywords:
wave ultrasonic;
time;
motor;
infinity ... See more keywords