全部文献期刊会议图书|学者科研项目
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作者:P. Nikkola , H.I. Reynolds
来源:[J].Journal of Volcanology and Geothermal Research(IF 2.193), 2017, Vol.340, pp.155-169
摘要:Abstract(#br)The 6-month long eruption at Holuhraun (August 2014–February 2015) in the Bárðarbunga-Veiðivötn volcanic system was the largest effusive eruption in Iceland since the 1783–1784 CE Laki eruption. The lava flow field covered ~ 84 km 2 and has an estimated bul...
作者:P. Nikkola , I. Mänttäri , O.T. Rämö
来源:[J].Bulletin of the Geological Society of Finland(IF 0.786), 2017, Vol.89 (1), pp.20-34
摘要:The Salittu Formation is one of the few metavolcanic successions in the U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine the age of the host rocks of the Juomasuo Au-Co-Cu deposit located in the late Archean Kuusamo supracrustal belt. Eve...
作者:O. Dumbrajs , P. Nikkola , B. Piosczyk
来源:[J].International Journal of Electronics(IF 0.509), 2001, Vol.88 (2), pp.215-224
摘要:Space-charge effects (so-called negative-mass instability) as the reason for electron energy spread arising in the region of the electron drift between the cathode and the cavity of a gyrotron are discussed. Theoretical calculations are compared with results of measurements perfo...
作者:P. Nikkola , C. Mahmed ...
来源:[J].International Journal of Refrigeration(IF 1.793), 2014, Vol.37, pp.43-50
摘要:Abstract(#br)The 1D active magnetic regenerator model developed at the University of Applied Sciences of Western Switzerland is described. The system of two partial differential equations is discretized with the finite differences method backward in time and solved with the tridi...
作者:... O. Sauter , R. Prater , P. Nikkola
来源:[J].2002, Vol.88 (20), pp.205001
摘要:Calculation of electron-cyclotron-current drive (ECCD) with the comprehensive CQL3D Fokker-Planck code for a TCV tokamak shot gives 550 kA of driven toroidal current, in marked disagreement with the 100-kA experimental value. Published ECCD efficiencies calculated with CQL3D in t...
作者:P. Nikkola , A. Pochelon
来源:[J].2004, Vol.93 (21), pp.215001
摘要:Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly (≃3  ms), during a slow (≃200  ms) self-inductive evolutio...
作者:... An. Martynov , P. Nikkola , C. Zucca
来源:[J].2005, Vol.94 (10), pp.105002
摘要:Improved electron energy confinement in tokamak plasmas, related to internal transport barriers, has been linked to nonmonotonic current density profiles. This is difficult to prove experimentally since usually the current profiles evolve continuously and current injection genera...
作者:... R. Putzu , O. Sari , P. Nikkola
来源:[J].International Journal of Energy Production and Management, 2017, (2), pp.153-164
摘要:This study presents the development of a real-scale latent heat thermal energy storage (TES) device based on an air-PCM (phase change material) heat exchanger. The device uses the outdoor ambient temperature difference between night and day to refresh the indoor air and shift or ...

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