Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Ilkka Tuominen"'
Autor:
Paul Jeffrey Gillespie, Shingo Hayashibe, Kaustubh Ravindra Nagarkar, Hitoshi Ito, Christopher James Kapusta, Tadashi Arai, Risto Ilkka Tuominen, Arun Virupaksha Gowda, Donna Marie Sherman, Liang Yin, Tammy Johnson
Publikováno v:
2017 International Conference on Electronics Packaging (ICEP).
Wide band gap (WBG) semiconductor devices have demonstrated superior electrical and thermal performance, compared to their silicon-based counterparts. However, innovative power module packaging design and materials suitable to WBG devices are require
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e818e4bfb6273430460de50eb06c725f
https://doi.org/10.23919/icep.2017.7939335
https://doi.org/10.23919/icep.2017.7939335
Autor:
M. Lindborg, Oleg Kochukhov, Lauri Jetsu, Ilya Ilyin, Nikolai Piskunov, Thomas Hackman, Ilkka Tuominen, J. Lehtinen, Maarit J. Mantere, P. Kajatkari
Publikováno v:
Astronomische Nachrichten. 332:859-865
We have studied the long-term spot activity of the RS CVn star II Peg by means of Doppler imaging based on spectroscopy and time series analysis of photometry. We present 28 Doppler imaging temperature maps spanning the years 1994–2010, of which 14
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::492d74df436588967ab56b1baa42a450
https://doi.org/10.1002/asna.201111616
https://doi.org/10.1002/asna.201111616
Autor:
I. S. Savanov, S. Järvinen, Ilkka Tuominen, Svetlana V. Berdyugina, Heidi Korhonen, Marc Weber, Klaus G. Strassmeier, Ilya Ilyin
Publikováno v:
Astronomy & Astrophysics. 488:1047-1055
Aims. In this paper we analyse photometric and spectroscopic observations of the young active dwarf V889 Her. We present new surface temperature maps, and compare them to earlier published Doppler maps, as well as to the results obtained from long-te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73f0890453b49779894d10f96881931e
https://doi.org/10.1051/0004-6361:200809837
https://doi.org/10.1051/0004-6361:200809837
Autor:
Ilya Ilyin, Heidi Korhonen, Klaus G. Strassmeier, Thomas Hackman, Svetlana V. Berdyugina, Ilkka Tuominen
Publikováno v:
Astronomy & Astrophysics. 476:881-891
Aims. We investigate the spot evolution and the surface differential rotation of the single late-type giant FK Com. Methods. A total of 18 new surface temperature maps of FK Com are calculated with the Doppler imaging technique for the years 1993–2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::202f3cc7865006338e1ee09809d5cc42
https://doi.org/10.1051/0004-6361:20041806
https://doi.org/10.1051/0004-6361:20041806
Publikováno v:
Astronomy & Astrophysics. 472:887-895
Context. As a young solar analogue, EK Draconis provides an opportunity to study the magnetic activity of the infant Sun. Aims. We present three new surface temperature maps of EK Draconis and compare them with previous results obtained from long-ter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f1c68611d03277af3df2dbb3c782e00
https://doi.org/10.1051/0004-6361:20077551
https://doi.org/10.1051/0004-6361:20077551
Publikováno v:
2015 IEEE 17th Electronics Packaging and Technology Conference (EPTC).
While component embedding technologies have reached maturity and are used for high volume manufacturing, the industry is looking for new ways to exploit the possibilities it enables. Growing interest in embedding is introducing new challenges, requir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4e00fa65a8465b88c8026bc553d12da
https://doi.org/10.1109/eptc.2015.7412298
https://doi.org/10.1109/eptc.2015.7412298
Publikováno v:
Proceedings of the International Astronomical Union. 2:437-442
We study convective overshooting by means of local 3D convection calculations. Using a mixing length model of the solar convection zone (CZ) as a guide, we determine the Coriolis number (Co), which is the inverse of the Rossby number, to be of the or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a805e62928a728db22636c7013f4610f
https://doi.org/10.1017/s1743921307000865
https://doi.org/10.1017/s1743921307000865
Publikováno v:
Astronomy & Astrophysics. 448:433-438
Aims: The Strouhal number (St), which is a nondimensional measure of the correlation time, is determined from numerical models of convection. The Strouhal number arises in the mean-field theories of angular momentum transport and magnetic field gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aff6fb83b4c302d444a334b741c37cbb
https://doi.org/10.1051/0004-6361:20042245
https://doi.org/10.1051/0004-6361:20042245
Publikováno v:
Astronomische Nachrichten. 326:186-189
We determine the Strouhal number (hereafter St), which is essentially a nondimensional measure of the correlation time, from numerical calculations of convection. We use two independent methods to estimate St. Firstly, we apply the minimal tau-approx
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::470affb18f8386f5951ce76e6d6fb655
https://doi.org/10.1002/asna.200410374
https://doi.org/10.1002/asna.200410374
Publikováno v:
Astronomy & Astrophysics. 432:657-664
We analyse photometric observations of the young active dwarf AB Dor, spanning more than 20 years. Similar to the young solar analog LQ Hya, AB Dor shows long-lived, nonaxisymmetric spot distribution - active longitudes in opposite hemispheres. The a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f744280feed60afdce2df1beccd13691
https://doi.org/10.1051/0004-6361:20041998
https://doi.org/10.1051/0004-6361:20041998