Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Ian Sammis"'
Publikováno v:
Journal of Computational Physics. 229:8259-8280
We describe the construction of a collection of quadrature formulae suitable for the efficient discretization of certain boundary integral equations on a very general class of two-dimensional domains with corner points. The resulting quadrature rules
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39e94a33369a56b11270cbb0eb26c074
https://doi.org/10.1016/j.jcp.2010.06.040
https://doi.org/10.1016/j.jcp.2010.06.040
Autor:
John Strain, Ian Sammis
Publikováno v:
Journal of Computational Physics. 228:7086-7108
An efficient algorithm is presented for the computation of Fourier coefficients of piecewise-polynomial densities on flat geometric objects in arbitrary dimension and codimension. Applications range from standard nonuniform FFTs of scattered point da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cea814537d8cdb943fc46ab8a24bc60f
https://doi.org/10.1016/j.jcp.2009.06.027
https://doi.org/10.1016/j.jcp.2009.06.027
Publikováno v:
The Astrophysical Journal. 540:583-587
We have studied 8 yr of active region observations from the United States Air Force/Mount Wilson data set, supplied by the NOAA World Data Center, to confirm the relation between δ spots and large flares. We found that after correcting some errors w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25005a82252df39fdbfd19b32a35faef
https://doi.org/10.1086/309303
https://doi.org/10.1086/309303
Autor:
Ian Sammis
Publikováno v:
Solar Physics. 189:173-179
The avalanche model of Lu and coworkers successfully reproduces important qualitative features of the flare-energy distribution. We test the prediction of the avalanche model that all active regions share a common power-law exponent by using it to de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06a06e423f1f34363d11ef8ec5b3e188
https://doi.org/10.1023/a:1005169602185
https://doi.org/10.1023/a:1005169602185
Autor:
Robert H. Cameron, Ian Sammis
Publikováno v:
The Astrophysical journal. 525(1)
We examine the great (solar) flare of 1990 May 24 that occurred in active region NOAA 6063. The Big Bear Solar Observatory videomagnetograph Stokes V and I images show a change in the longitudinal field before and after the flare. Since the flare occ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e129fa749f65e806b5b399dd0c3e9038
https://pubmed.ncbi.nlm.nih.gov/10511514
https://pubmed.ncbi.nlm.nih.gov/10511514
Autor:
J. M. Carlson, Ian Sammis
Publikováno v:
Physical Review Letters. 74:4357-4357
A Comment on the Letter by J. Rosendahl, M. Vekic, and J. E. Rutledge, Phys. Rev. Lett. 73, 537 (1994). The authors of the Letter offer a Reply.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04306ab285c449e851656deacf9320d3
https://doi.org/10.1103/physrevlett.74.4357
https://doi.org/10.1103/physrevlett.74.4357