Results 41 to 50 of about 5,204 (224)

On Rational Minkowski Pythagorean Hodograph Curves [PDF]

open access: yes, 2009
Minkowski Pythagorean hodograph curves are polynomial curves with polynomial speed, measured with respect to Minkowski norm. Curves of this special class are particularly well suited for representing medial axis transforms of planar domains.
Kosinka, Jiri   +3 more
core   +1 more source

On Minkowski’s singular function [PDF]

open access: yesProceedings of the American Mathematical Society, 1987
The function f on the closed unit interval I to be considered here was introduced by Minkowski. It maps the algebraic irrationalities of degree at most 2 continuously to the rationals in I. If z = a/b and z' = c/d are (reduced) fractions, then we write z * z' for the mediant (a + c)/(b + d) and z z' for the arithmetic mean. Let Q denote the (dense) set
openaire   +1 more source

Are non-vacuum states much relevant for retrieving shock wave memory of spacetime?

open access: yesPhysics Letters B, 2020
Shock wave gives back reaction to spacetime and the information is stored in the memory of background. Quantum memory effect of localised shock wave on Minkowski metric is investigated here.
Bibhas Ranjan Majhi
doaj   +1 more source

An integer basis for celestial amplitudes

open access: yesJournal of High Energy Physics, 2023
We present a discrete basis of solutions of the massless Klein-Gordon equation in 3 + 1 Minkowski space which transform as 𝔰𝔩(2, ℂ) Lorentz/conformal primaries and descendants, and whose elements all have integer conformal dimension.
Jordan Cotler   +2 more
doaj   +1 more source

Loop corrections in Minkowski spacetime away from equilibrium. Part II. Finite-time results

open access: yesJournal of High Energy Physics, 2023
Loop corrections to finite-time correlation functions in quantum field theories away from equilibrium can be calculated using the in-in path integral approach.
Spasen Chaykov   +3 more
doaj   +1 more source

Curves in the Minkowski plane and Lorentzian surfaces [PDF]

open access: yes, 2012
We investigate in this thesis the generic properties of curves in the Minkowski plane R2 1 and of smooth Lorentzian surfaces. The generic properties of curves in R2 1 are obtained by studying the contacts of curves in R2 1 with lines and pseudo-circles ...
SALOOM, AMANI
core  

Waveguide Photoactuators: Materials, Fabrication, and Applications

open access: yesAdvanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi   +4 more
wiley   +1 more source

Risk‐aware safe reinforcement learning for control of stochastic linear systems

open access: yesAsian Journal of Control, EarlyView.
Abstract This paper presents a risk‐aware safe reinforcement learning (RL) control design for stochastic discrete‐time linear systems. Rather than using a safety certifier to myopically intervene with the RL controller, a risk‐informed safe controller is also learned besides the RL controller, and the RL and safe controllers are combined together ...
Babak Esmaeili   +2 more
wiley   +1 more source

Promoting the Mathematization of Physics: Hermann Minkowski's Draft Presentations of His 1908 “Grundgleichungen” Paper

open access: yesBerichte zur Wissenschaftsgeschichte, EarlyView.
I present and discuss two drafts of remarks prepared by the mathematician Hermann Minkowski (1864–1909). They were composed in December 1907 while preparing his paper on the “Basic Equations of Electromagnetic Processes in Moving Bodies” for publication in the Proceedings of the Göttingen Academy of Sciences.
Tilman Sauer
wiley   +1 more source

Corrections to “A Hybrid Minkowski-Log-Cosh Loss Function for Robust LSTM-Based Time Series Forecasting”

open access: yesIEEE Access
Presents corrections to the paper, (A Hybrid Minkowski-Log-Cosh Loss Function for Robust LSTM-Based Time Series Forecasting).
Kouyakou-Abalo Simsoba   +2 more
doaj   +1 more source

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