Results 51 to 60 of about 1,880,861 (238)

THE SQUARE OF WHITE NOISE AS A JACOBI FIELD [PDF]

Infinite Dimensional Analysis, Quantum Probability and Related Topics, 2004
We identify the representation of the square of white noise obtained by Accardi, Franz and Skeide in [Comm. Math. Phys.228 (2002) 123–150] with the Jacobi field of a Lévy process of Meixner's type.
openaire   +2 more sources

Optimal Homogeneous ℒp$$ {\boldsymbol{\mathcal{L}}}_{\boldsymbol{p}} $$‐Gain Controller

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Nonlinear ℋ∞$$ {\mathscr{H}}_{\infty } $$‐controllers are designed for arbitrarily weighted, continuous homogeneous systems with a focus on systems affine in the control input. Based on the homogeneous ℒp$$ {\mathcal{L}}_p $$‐norm, the input–output behavior is quantified in terms of the homogeneous ℒp$$ {\mathcal{L}}_p $$‐gain as a ...
Daipeng Zhang, Benjamin Calmbach, Jaime A. Moreno, Johann Reger   +3 more
wiley   +1 more source

A (3 + 1)-dimensional nonlinear extended Zakharov–Kuznetsov dynamical equation: Bifurcation and traveling wave solutions

AIP Advances, 2020
This paper studies the (3 + 1) extended Zakharov–Kuznetsov (EZK) dynamical equation that is utilized to describe nonlinear three-dimensional dust-ion-acoustic solitary waves in a magnetized two-ion-temperature dusty plasma.
M. M. Arab
doaj   +1 more source

Fertilizer Sustainability: A Conceptual Framework for Assessing Equitable and Sustainable Soil Inputs

Sustainable Development, EarlyView.
ABSTRACT Modern industrial agriculture is predicated largely on the production and utilization of chemical fertilizers. Although this approach has played an integral role in increasing food security in many parts of the world, the long‐term sustainability of this resource‐intensive approach is questionable.
Benjamin Wilde, Roman Hüppi, Gina Garland, Rafaela Feola Konz, Kenza Benabderrazik, William Thompson, Martin Hartmann, Bernard Vanlauwe, Kokou Kintche, Leonhard Späth, Matieyedou Konlambigue, Johanna Jacobi, Johan Six   +12 more
wiley   +1 more source

GPU-ACCELERATED SOLUTION OF THE 2D POISSON EQUATION: A COMPARATIVE STUDY OF JACOBI AND RED-BLACK GAUSS–SEIDEL METHODS WITH GLOBAL AND SHARED MEMORY

Journal of Problems in Computer Science and Information Technologies
The Poisson equation is a canonical elliptic partial differential equation (PDE) that arises in diverse fields such as electrostatics, fluid dynamics, and heat transfer.
Erlan Makhmut, Beiimbet Sansyzbay, Aidarov Kanat   +2 more
doaj   +1 more source

Historical Development of Zoo Tapir (Tapirus ssp.) Survivorship

Zoo Biology, EarlyView.
The survivorship of tapirs in zoos has improved significantly over historical time. ABSTRACT Tapirs (Tapirus spp.) are large, long‐lived herbivores native to Central and South America and Southeast Asia. All species are currently classified as Vulnerable (T. terrestris) or Endangered (other species) in the IUCN SSC Red List.
Johanna E. Wittenberg, Laurie Bingaman Lackey, Jörg Beckmann, Marco Roller, Dennis W. H. Müller, Jan Pluháček, Marcus Clauss, João Pedro Meireles   +7 more
wiley   +1 more source

Polynomial‐shaped electrodes for adaptive X‐ray optics

Journal of Synchrotron Radiation, EarlyView.
A shaped electrode design for lithium niobate adaptive X‐ray mirrors connects actuator degrees of freedom to specific polynomial orders, enabling general shape control and the correction of defocus, coma and fourth‐order aberrations with a limited number of inputs.For adaptive mirrors on X‐ray beamlines and optical systems, we describe a strategy for ...
Kenneth A. Goldberg, Francesco Marzari, Grant D. Cutler   +2 more
wiley   +1 more source

An approximation method for the stabilizing solution of the Hamilton-Jacobi equation for integrable systems using Hamiltonian perturbation theory [PDF]

, 2006
In this report, a method for approximating the stabilizing solution of the Hamilton-Jacobi equation for integrable systems is proposed using symplectic geometry and a Hamiltonian perturbation technique.
Sakamoto, Noboru, Sakamoto, N., Sakamoto, Noboru,, van der Schaft, Arjan, Schaft, Arjan J. van der, Noboru Sakamoto, Schaft, Arjan J. van der,, Schaft, Arjan J. van der; id_orcid, van der Schaft, AJ; id_orcid, Arjan J. van der Schaft, van der Schaft, AJ   +10 more
core   +4 more sources

125 years of exploration and research at Gough's Cave (Somerset, UK) 125 ans d'exploration et de recherches à Gough's Cave (Somerset, Royaume‐Uni)

Journal of the Royal Anthropological Institute, EarlyView.
Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello, Mark D. Lewis, Simon A. Parfitt   +2 more
wiley   +1 more source

Hamiltonian approach to GR – Part 1: covariant theory of classical gravity

European Physical Journal C: Particles and Fields, 2017
A challenging issue in General Relativity concerns the determination of the manifestly covariant continuum Hamiltonian structure underlying the Einstein field equations and the related formulation of the corresponding covariant Hamilton–Jacobi theory ...
Claudio Cremaschini, Massimo Tessarotto
doaj   +1 more source