Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Olli V. Lounasmaa"'
Autor:
Heikki Seppä, Olli V. Lounasmaa
Publikováno v:
Lounasmaa, O V & Seppä, H 2004, ' SQUIDs in neuro-and cardiomagnetism ', Journal of Low Temperature Physics, vol. 135, no. 5-6, pp. 295-335 . https://doi.org/10.1023/B:JOLT.0000029500.95314.e9
In this paper, an adequate account of the theory and practice of SQUIDs and of magnetoencephalography (MEG) and magnetocardiography (MCG) is given. MEG and MCG are two completely non-invasive imaging techniques, suitable for basic and clinical studie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a185f575083ce9489e10bcdb7261eb0
https://doi.org/10.1023/B:JOLT.0000029500.95314.e9
https://doi.org/10.1023/B:JOLT.0000029500.95314.e9
Publikováno v:
Proceedings of the National Academy of Sciences. 97:10590-10594
We compared magnetoencephalographic responses for natural vowels and for sounds consisting of two pure tones that represent the two lowest formant frequencies of these vowels. Our aim was to determine whether spectral changes in successive stimuli ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a82372f3637710619eecf566adb3fec2
https://doi.org/10.1073/pnas.180317297
https://doi.org/10.1073/pnas.180317297
Publikováno v:
Journal of Low Temperature Physics. 120:121-150
A new cascade nuclear demagnetization cryostat has been designed and constructed. Our aim was to build a versatile, modular cryostat, with a large experimental space providing an excellent platform for various types of ultralow temperature measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d300311ae71e6dca218cf99ac28b6d66
https://doi.org/10.1023/a:1004665020659
https://doi.org/10.1023/a:1004665020659
Autor:
Olli V. Lounasmaa, Erkki Thuneberg
Publikováno v:
Proceedings of the National Academy of Sciences. 96:7760-7767
In this review we first present an introduction to 3 He and to the ROTA collaboration under which most of the knowledge on vortices in superfluid 3 He has been obtained. In the physics part, we start from the exceptional properties of helium at milli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a5f7149ea8e2bb6f9bf0b31d141d307
https://doi.org/10.1073/pnas.96.14.7760
https://doi.org/10.1073/pnas.96.14.7760
Autor:
Kurt Nørgaard Clausen, K. Lefmann, Juha Tuoriniemi, A. Metz, Olli V. Lounasmaa, F. B. Rasmussen, M. Steiner, R. T. Vuorinen, K. K. Nummila, K. Siemensmeyer
Publikováno v:
Physica B: Condensed Matter. :506-510
Nuclear magnetic order in copper and silver has been investigated by neutron diffraction. Antiferromagnetic order is observed in these simple, diamagnetic metals at temperatures below 50 nK and 560 pK, respectively. Both crystallize in the FCC-symmet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59301272d4e359f9a5d456cf8c14141f
https://doi.org/10.1016/s0921-4526(97)00630-3
https://doi.org/10.1016/s0921-4526(97)00630-3
Publikováno v:
Neuroscience. 77:49-55
Whole-head neuromagnetic responses were recorded from seven subjects to pictures of faces and to various control stimuli. Four subjects displayed signals specific to faces. The combination of functional information from magnetoencephalography and ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2373c5c923f9e010ce8f06f12e34277f
https://doi.org/10.1016/s0306-4522(96)00419-8
https://doi.org/10.1016/s0306-4522(96)00419-8
Autor:
A. S. Oja, Olli V. Lounasmaa
Publikováno v:
Reviews of Modern Physics. 69:1-136
This paper is a comprehensive review of almost twenty years of research on nuclear magnetic ordering, first in copper and later in silver and rhodium metals. The basic principles of nuclear magnetism and the measurement of positive and negative spin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2ca2d0dc98565f06c7823e3157eaf82
https://doi.org/10.1103/revmodphys.69.1
https://doi.org/10.1103/revmodphys.69.1
Autor:
Olli V. Lounasmaa
Publikováno v:
Physica Scripta. :70-79
Magnetoencephalography (MEG) and magnetocardiography (MCG) are two completely non-invasive imaging techniques, suitable for basic and clinical studies of human subjects. Large SQUID arrays, operating at liquid helium temperatures, are employed for de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::829b51d2d0c885c6874c94999462031a
https://doi.org/10.1088/0031-8949/1996/t66/009
https://doi.org/10.1088/0031-8949/1996/t66/009
Autor:
K. Siemensmeyer, Kurt Nørgaard Clausen, K. K. Nummila, Juha Tuoriniemi, M. Steiner, R. T. Vuorinen, A. Metz, K. Lefmann, F. B. Rasmussen, Olli V. Lounasmaa
Publikováno v:
University of Copenhagen
Spontaneous long-range nuclear antiferromagnetic order in the spin-\textonehalf{} system of silver nuclei was observed by neutron diffraction on a single crystal of $^{109}\mathrm{Ag}$. A structure with the ordering vector $k=(\frac{2\ensuremath{\pi}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fae0ef929e0328676bab4825550cf89
https://doi.org/10.1103/physrevlett.75.3744
https://doi.org/10.1103/physrevlett.75.3744
Autor:
Vladimir V. Dmitriev, Yu. M. Bunkov, J. S. Korhonen, J.H. Koivuniemi, P. I. Soininen, Matti Krusius, Ü. Parts, Mikael Fogelström, Olli V. Lounasmaa, Grigory Volovik, Y. Kondo, M. Huebner, V. M. H. Ruutu, N. B. Kopnin
Publikováno v:
Europhysics Letters (EPL). 31:449-454
Nucleation of vortices in units of one quantum has been observed with c.w. NMR in a rotating cylinder filled with 3He-B. During acceleration a new vortex is created each time the counterflow velocity at the perimeter reaches a critical value vc(T, p)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::237bcf7bd1c7ddd40cf376a9fb1c858b
https://doi.org/10.1209/0295-5075/31/8/005
https://doi.org/10.1209/0295-5075/31/8/005