Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Y. Tulunay"'
Publikováno v:
Annales Geophysicae, Vol 26, Pp 3945-3954 (2008)
Atmospheric processes are highly nonlinear. A small group at the METU in Ankara has been working on a fuzzy data driven generic model of nonlinear processes. The model developed is called the Middle East Technical University Fuzzy Neural Network M
Externí odkaz:
https://doaj.org/article/6ba0294a01114c059e93f97f2f26a40d
Autor:
Y. Tulunay, E. Tulunay
Publikováno v:
Advances in Geosciences, Vol 3, Pp 29-33 (2005)
Space weather is a new subject which has not yet become widely understood or appreciated. The University offers the unique opportunity to develop knowledge and understanding about space weather that can then be applied as graduates enter the mainstre
Externí odkaz:
https://doaj.org/article/553a3acf4e154d809dbef9dfbcb8d501
Publikováno v:
Annals of Geophysics, Vol 45, Iss 1 (2002)
The deviations of hourly f 0 F 2 from monthly medians for 20 stations in Europe during the period 1958-1998 are studied. Spectral analysis is used to show that, both for original data (for each hour) and for the deviations from monthly medians, the d
Externí odkaz:
https://doaj.org/article/210940be2a2240109c27aa600a66dea7
Publikováno v:
Annals of Geophysics, Vol 45, Iss 1 (2002)
The «prediction» and «forecast» of the critical frequency of the F 2 layer (f0 F2 ) is an important issue for frequency planning in short wave radio communications. In this context, «prediction» is used for the determination of monthly median v
Externí odkaz:
https://doaj.org/article/498aa9847b5340198fa6b49e15fbd343
Autor:
L. Altas, T. Atac, A. Özgüc, Z. Zbyszynski, A. Rokicki, I. Stanislawska, Y. G. Yigit, S. A. Baykal, Y. Tulunay, O. Barlas
Publikováno v:
Annals of Geophysics, Vol 39, Iss 4 (1996)
During the COST 238: PRIME project there was a campaign of 15-min intervals of the f0F2 soundings at Kandilli, Rome, Sofia, Poitiers and Lannion. The campaign took place for one month in June 1993. The spectral analysis of the data using a Fast Fouri
Externí odkaz:
https://doaj.org/article/fbe9fecf95034ab28ec460ab2d262772
Autor:
Y. Tulunay
Publikováno v:
Annals of Geophysics, Vol 39, Iss 4 (1996)
Using critical frequencies, f0F2 from the Lannion, Slough, Poitiers, Garchy, Dourbes, Rome, Juliusrud, Gibilmanna, Pruhonice, Uppsala, Kaliningrad, Miedzeszyn, Sofia, Athens and Kiev ionosonde stations, the possible effects of the orientation of the
Externí odkaz:
https://doaj.org/article/35ef488541a744dcadda3f535a90973b
Publikováno v:
Annals of Geophysics, Vol 39, Iss 4 (1996)
The structure of the Interplanetary Magnetic Field (IMF) is responsible for an essential part of the variability of the ionospheric plasma as demonstrated by investigations of the influence of IMF sector boundary crossings as well as of ?Bz-changes (
Externí odkaz:
https://doaj.org/article/e4edf87ba2384d458a6382e5f52c32d4
Publikováno v:
Advances in Radio Science, Vol 2, Pp 281-282 (2004)
Professor Karl Rawer encourages, stimulates researchers. He takes initiative and supports researchers in producing papers about new techniques and methods. As a typical case the authors here report their experience with Professor Rawer during the pub
Externí odkaz:
https://doaj.org/article/b5cea42fcb0047cc9c60551dbaff9bfa
Autor:
Y. Tulunay
Publikováno v:
Annals of Geophysics, Vol 37, Iss 2 (1994)
Using criticaI frequencies, f0F2 from the Uppsala, Lannion and Dourbes ionosonde stations, the possible effects of the orientation of the IMF on mid-latitude ionosphere are further investigated. For this purpose, the regular diurnal, seasonal and sol
Externí odkaz:
https://doaj.org/article/c4676adab4934ddca485df683e3ea435
Autor:
F. Erdoĝmuş, Y. Tulunay
Publikováno v:
Il Nuovo Cimento C. 15:107-110
Turkish radiosonde data obtained at the meteorological stations in Istanbul, Ankara and Izmir have further been analysed in order to study the steadiness of the upper winds for the seven pressure levels from 1000 hPa to 100 hPa between 1970 and 1984.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06e3ba42478917ed0790d44947e8202e
https://doi.org/10.1007/bf02507776
https://doi.org/10.1007/bf02507776