Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Jonsson, B Lars G"'
Publikováno v:
Nonlinearity 2007, 20, 1031-1075
We study solutions close to solitary waves of the pseudo-relativistic Hartree equation describing boson stars under the influence of an external gravitational field. In particular, we analyze the long-time effective dynamics of such solutions. In ess
Externí odkaz:
http://arxiv.org/abs/math-ph/0605053
Publikováno v:
Commun.Math.Phys.274:1-30,2007
We study the nonlinear equation $i \partial_t \psi = (\sqrt{-\Delta + m^2} - m) \psi - ( |x|^{-1} \ast |\psi|^2 ) \psi$ on $\RR^3$, which is known to describe the dynamics of pseudo-relativistic boson stars in the mean-field limit. For positive mass
Externí odkaz:
http://arxiv.org/abs/math-ph/0512040
Determining Direction‐of‐Arrival Accuracy for Installed Antennas by Postprocessing of Far‐Field Data
Direction‐of‐arrival (DoA) estimation accuracy can be degraded due to installation effects, such as platform reflections, diffraction from metal edges, and reflections and refraction in the radome. To analyze these effects, this paper starts with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a39c9456fe5a66878962cb999a63faf5
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267555
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267555
The accuracy of two equivalent antenna representations, near-field sources and far-field sources, are evaluated for an antenna installed on a simplified platform in a series of case studies using different configurations of equivalent antenna represe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::285234d5fe41080386620bf6529ac632
Autor:
Jonsson, B. Lars G.1,2,3 ljonsson@math.toronto.edu, Gustafsson, Mats4 mats@es.lth.se, Weston, Vaughan H.5 vhw2222crby@worldnet.att.net, De Hoop, Maarten V.6 mdehoop@mines.edu
Publikováno v:
SIAM Journal on Applied Mathematics. 2004, Vol. 64 Issue 6, p1954-1986. 33p.
Akademický článek
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Autor:
Jonsson, B. Lars G., Gustafsson, Mats
Publikováno v:
Technical Report LUTEDX/(TEAT-7243)/1-32/(2016); (2016)
Electric and magnetic current densities are an essential part of electromagnetic theory. The goal of the present paper is to define and investigate stored energies that are valid for structures that can support both electric and magnetic current dens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______1110::3a2eb5dd34c67694b74da919d9c4d021
https://lup.lub.lu.se/record/ba2e2a34-0124-4c0e-8295-72fef17ab6ae
https://lup.lub.lu.se/record/ba2e2a34-0124-4c0e-8295-72fef17ab6ae
Autor:
Gustafsson, Mats, Jonsson, B. Lars G.
Decomposition of the electromagnetic energy into its stored and radiated parts is instrumental in the evaluation of antenna Q and the corresponding fundamental limitations on antennas. This decomposition is not unique and there are several proposals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::cabdae0fb45165b551b412cf932140f4
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117929
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117929
Publikováno v:
Technical Report LUTEDX/(TEAT-7115)/1-36/(2003); (2003)
In the present paper an iterative time-reversal algorithm, that retrofocuses an acoustic wave field to its controllable part is established. For a fixed temporal support, i.e., transducer excitation time, the algorithm generates an optimal retrofoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::5308779c84013048a819021eff2c2ff3
http://lup.lub.lu.se/record/530517/file/624940.pdf
http://lup.lub.lu.se/record/530517/file/624940.pdf
Directional Decomposition in Anisotropic Heterogeneous Media for Acoustic and Electromagnetic Fields
Autor:
Jonsson, B. Lars G.
Directional wave-field decomposition for heterogeneousanisotropic media with in-stantaneous response is establishedfor both the acoustic and the electromagnetic equations.We derive a sufficient condition for ellipticity of thesystem's matrix in the L
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3099