Zobrazeno 1 - 10
of 70
pro vyhledávání: '"J. Lyytinen"'
Publikováno v:
Information Systems Research. 34(2):463-486
As of late, the use of ‘digital’ as a qualifier to established research concepts has been increasing. However, we have yet to clearly establish what makes a ‘digital x’ concept distinct from an ‘IT x’ concept, where ‘x’ stands for wel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3dbebcd6bb7bed5717a84225e0775df5
https://research.cbs.dk/en/publications/0833f63c-3a82-4c95-83d2-eca7042c3c07
https://research.cbs.dk/en/publications/0833f63c-3a82-4c95-83d2-eca7042c3c07
Akademický článek
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Autor:
J. Lehtinen, Lauri Jetsu, P. Kajatkari, J. Lyytinen, T. Markkanen, Jaana Toivari-Viitala, S. Porceddu
Publikováno v:
Open Astronomy, Vol 27, Iss 1, Pp 232-263 (2018)
An ancient Egyptian Calendar of Lucky and Unlucky Days, the Cairo Calendar (CC), assigns luck with the period of 2.850 days. Previous astronomical, astrophysical and statistical analyses of CC support the idea that this was the period of the eclipsin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dd135ae1a262e7bfac6293d3d209516
http://hdl.handle.net/10138/288723
http://hdl.handle.net/10138/288723
Akademický článek
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Publikováno v:
Astronomy & Astrophysics. 499:601-613
Aims. To determine the quantity and quality requirements for the terrestrial impact crater data which would allow reliable detection of real periodicity. Methods. Artificial impact crater data samples of different size and accuracy are simulated. Ero
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1deb2481416d2d051376de2daa4c1152
https://doi.org/10.1051/0004-6361/200811213
https://doi.org/10.1051/0004-6361/200811213
Autor:
Peter H. Johansson, S. Maisala, Asko Palviainen, Kyösti Ryynänen, Douglas S. Hall, Samuel Kontinen, Eero Esko, Gregory W. Henry, Lauri Jetsu, Thomas Hackman, Prisse Könönen, J. Lyytinen
Publikováno v:
Astronomy & Astrophysics. 383:197-201
Our time series analysis of sixteen BV light curves of the chromospherically active binary V511 Lyr confirmed the $2\fd7$ rotation period uniquely. The seasonal periodicity changes of 3.8% indicated the presence of detectable surface differential rot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9db778186295f013d6d42007ab579f
https://doi.org/10.1051/0004-6361:20011725
https://doi.org/10.1051/0004-6361:20011725
Autor:
Alice J. Walker, Kalle J. Lyytinen
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1db2e6b73c6585307475d9502986c7b
https://doi.org/10.2139/ssrn.2327875
https://doi.org/10.2139/ssrn.2327875
Autor:
S. Porceddu, T. Markkanen, P. Kajatkari, J. Lyytinen, J. Lehtinen, Jaana Toivari-Viitala, Lauri Jetsu
The eclipses in binary stars give precise information of orbital period changes. Goodricke discovered the 2.867 days period in the eclipses of Algol in the year 1783. The irregular orbital period changes of this longest known eclipsing binary continu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f671fe1dbf878167954171ad723d0322
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6eebd90a606d15bef34d470c97301cb1
https://doi.org/10.2139/ssrn.1657743
https://doi.org/10.2139/ssrn.1657743
Publikováno v:
EAS Publications Series. 64:403-404
Fabritius discovered the first variable star, Mira, in 1596. Holwarda determined the 11 months period of Mira in 1638. Montanari discovered the next variable star, Algol, in 1669. Its period, 2.867 days, was determined by Goodricke (178). Algol was a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaf0b84efdd10aa03119c1f83a807129
https://doi.org/10.1051/eas/1364066
https://doi.org/10.1051/eas/1364066