Search results
- 1.0430279 - GFÚ 2015 RIV GB eng J - Journal Article
Valach, F. - Bochníček, Josef - Hejda, Pavel - Revallo, M.
Strong geomagnetic activity forecast by neural networks under dominant southern orientation of the interplanetary magnetic field.
Advances in Space Research. Roč. 53, č. 4 (2014), s. 589-598. ISSN 0273-1177. E-ISSN 1879-1948
R&D Projects: GA AV ČR(CZ) IAA300120608; GA MŠMT OC09070
Institutional support: RVO:67985530
Keywords : geomagnetic activity * interplanetary magnetic field * artificial neural network * ejection of coronal mass * X-ray flares
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 1.358, year: 2014
Permanent Link: http://hdl.handle.net/11104/0235237 - 2.0365304 - GFÚ 2012 RIV GB eng J - Journal Article
Valach, F. - Revallo, M. - Hejda, Pavel - Bochníček, Josef
Predictions of SEP events by means of a linear filter and layer-recurrent neural network.
Acta Astronautica. Roč. 69, č. 9-10 (2011), s. 758-766. ISSN 0094-5765. E-ISSN 1879-2030
R&D Projects: GA AV ČR(CZ) IAA300120608; GA MŠMT OC09070
Grant - others:VEGA(SK) 2/0015/11; VEGA(SK) 2/0022/11
Institutional research plan: CEZ:AV0Z30120515
Keywords : coronal mass ejection * X-ray flare * solar energetic particles * artificial neural network
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 0.614, year: 2011
Permanent Link: http://hdl.handle.net/11104/0200577 - 3.0330299 - GFÚ 2010 RIV US eng J - Journal Article
Valach, F. - Revallo, M. - Bochníček, Josef - Hejda, Pavel
Solar energetic particle flux enhancement as a predictor of geomagnetic activity in a neural network-based model.
Space Weather-the International Journal of Research and Applications. Roč. 7, April (2009), S04004/1-S04004/7. E-ISSN 1542-7390
R&D Projects: GA AV ČR(CZ) IAA300120608; GA AV ČR 1QS300120506
Institutional research plan: CEZ:AV0Z30120515
Keywords : neural networks * coronal mass ejections * energetic particles * flares * radio emissions * magnetic storms
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 1.845, year: 2009
Permanent Link: http://hdl.handle.net/11104/0176122 - 4.0330243 - GFÚ 2010 RIV PL eng J - Journal Article
Střeštík, Jaroslav
Variations in solar and geomagnetic activity with periods near to 1.3 year.
Central European Journal of Geosciences. Roč. 1, č. 2 (2009), s. 152-156. ISSN 2081-9900. E-ISSN 1896-1517
R&D Projects: GA AV ČR(CZ) IAA300120608
Institutional research plan: CEZ:AV0Z30120515
Keywords : transyear variation * geomagnetic activity * solar activity * wavelet analysis
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Permanent Link: http://hdl.handle.net/11104/0176074 - 5.0310845 - GFÚ 2009 RIV NL eng J - Journal Article
Charvátová, Ivanka
Long-term predictive assessments of solar and geomagnetic activities made on the basis of the close similarity between the solar inertial motions in the intervals 1840–1905 and 1980–2045.
[Dlouhodobé předpovědní odhady sluneční a geomagnetické aktivity vypracované na základě shodnosti pohybů Slunce v intervalech 1840-1905 a 1980-2045.]
New Astronomy. Roč. 14, č. 1 (2009), s. 25-30. ISSN 1384-1076. E-ISSN 1384-1092
R&D Projects: GA AV ČR(CZ) IAA300120608
Institutional research plan: CEZ:AV0Z30120515
Keywords : solar inertial motion * solar activity * geomagnetic activity * long-term predictive assessments
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 1.675, year: 2009
Permanent Link: http://hdl.handle.net/11104/0162599 - 6.0087275 - GFÚ 2008 RIV CZ eng J - Journal Article
Valach, F. - Hejda, Pavel - Bochníček, Josef
Geoeffectiveness of XRA events associated with RSP II and/or RSP IV estimated using the artificial neural network.
[Odhad geoefektivity rentgenových erupcí spojených s RSP II a/nebo RSP IV pomocí umělých neuronových sítí.]
Studia geophysica et geodaetica. Roč. 51, č. 4 (2007), s. 551-562. ISSN 0039-3169. E-ISSN 1573-1626
R&D Projects: GA AV ČR(CZ) IAA300120608; GA AV ČR 1QS300120506; GA MŠMT 1P05OC031
Grant - others:Grantová agentura SR(SK) VEGA 2/5121/25; EC(XE) COST 724
Institutional research plan: CEZ:AV0Z30120515
Source of funding: V - Other public resources ; R - Framework programmes of European Commission
Keywords : solar energetic events * solar radio bursts * geomagnetic activity * artificial neural network
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 0.733, year: 2007
Permanent Link: http://hdl.handle.net/11104/0149171 - 7.0086638 - GFÚ 2008 RIV GB eng J - Journal Article
Charvátová, Ivanka - Střeštík, Jaroslav
Relations between the solar inertial motion, solar activity and geomagnetic index aa since the year 1844.
[Vztahy mezi inerciálním pohybem Slunce, sluneční aktivitou a geomagnetickým indexem aa od roku 1844.]
Advances in Space Research. Roč. 40, - (2007), s. 1026-1031. ISSN 0273-1177. E-ISSN 1879-1948
R&D Projects: GA AV ČR(CZ) IAA300120608
Institutional research plan: CEZ:AV0Z30120515
Keywords : solar motion * solar activity * geomagnetic activity
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 0.774, year: 2007
Permanent Link: http://hdl.handle.net/11104/0148846 - 8.0085308 - GFÚ 2008 RIV CZ eng J - Journal Article
Bochníček, Josef - Hejda, Pavel - Valach, F.
Solar energetic events in the years 1996-2004. The analysis of their geoeffectiveness.
[Sluneční energetické jevy v letech 1996-2004. Analýza jejich geoefektivity.]
Studia geophysica et geodaetica. Roč. 51, č. 3 (2007), s. 439-447. ISSN 0039-3169. E-ISSN 1573-1626
R&D Projects: GA MŠMT 1P05OC031; GA AV ČR(CZ) IAA300120608
Grant - others:Grantová agentura SR(SK) VEGA 2/5121/25; EC(XE) COST 724
Institutional research plan: CEZ:AV0Z30120515
Source of funding: V - Other public resources ; R - Framework programmes of European Commission
Keywords : solar energetic events * solar radio bursts * geomagnetic activity
Subject RIV: DE - Earth Magnetism, Geodesy, Geography
Impact factor: 0.733, year: 2007
Permanent Link: http://hdl.handle.net/11104/0147856 - 9.0085240 - GFÚ 2008 RIV DE eng J - Journal Article
Charvátová, Ivanka
The prominent 1.6-year periodicity in solar motion due to the inner planets.
[Dominantní perioda 1.6 let v pohybu Slunce vlivem vnitřních planet.]
Annales Geophysicae. Roč. 25, č. 5 (2007), s. 1227-1232. ISSN 0992-7689. E-ISSN 1432-0576
R&D Projects: GA AV ČR(CZ) IAA300120608
Institutional research plan: CEZ:AV0Z30120515
Keywords : solar-planetary relationships * solar physics * celestial mechanis
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 1.427, year: 2007
Permanent Link: http://hdl.handle.net/11104/0147796 - 10.0081370 - ÚI 2007 RIV NL eng J - Journal Article
Paluš, Milan - Kurths, J. - Schwarz, U. - Seehafer, N. - Novotná, Dagmar - Charvátová, Ivanka
The Solar Activity Cycle is Weakly Synchronized with the Solar Inertial Motion.
[Cyklus sluneční aktivity je slabě synchronizován s inerciálním pohybem slunce.]
Physics Letters. A. Roč. 365, č. 5-6 (2007), s. 421-428. ISSN 0375-9601. E-ISSN 1873-2429
R&D Projects: GA AV ČR IAA3042401; GA AV ČR(CZ) IAA300120608
Institutional research plan: CEZ:AV0Z10300504; CEZ:AV0Z30420517; CEZ:AV0Z30120515
Keywords : sunspot cycle * phase synchronization * solar inertial motion * hypothesis testing * surrogate data
Subject RIV: DG - Athmosphere Sciences, Meteorology
Impact factor: 1.711, year: 2007
Permanent Link: http://hdl.handle.net/11104/0145257File Download Size Commentary Version Access 0081370.pdf 0 439.4 KB Author´s preprint open-access