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  • 1
    Electronic Resource
    Electronic Resource
    Phase transitions and hysteresis in nonlocal and order-parameter models (1995)
    Springer
    Meccanica 30 (1995), S. 541-565 
    Details
    ISSN: 1572-9648
    Keywords: Phase transitions ; Hysteresis ; Order-parameter ; Nonlocal equations ; Phase transformations ; Solid mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Sommario Il lavoro descrive due tipi di regolarizzazione del problema quasistatico per un potenziale con due minimi in una dimensione. Un modello evidenzia caratteri di non località spaziale, mentre l'altro conduce ad una teoria con parametro d'ordine. Si derivano alcuni risultati di esistenza e regolarità e si presentano alcuni studi numerici che mostrano l'isteresi e il moto delle frontiere tra le fasi.
    Notes: Abstract The paper describes two types of regularization to the basic quasistatic double-well potential problem in one space dimension. One model features a spatially nonlocal term while the other incorporates the use of an order parameter. Some basic existence and regularity results for these modified models are derived and some numerical calculations that show hysteresis and motion of phase boundaries are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557084
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Intersession replicability of dipole parameters from three components of the auditory evoked magnetic field (1990)
    Springer
    Brain topography 3 (1990), S. 311-319 
    Details
    ISSN: 1573-6792
    Keywords: Magnetoencephalography ; Auditory evoked fields ; Current dipoles ; Magnetic resonance imaging ; Source localization ; Replicability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The replicability of dipole localizations between sessions in an unselected group of subjects was studied. Auditory evoked magnetic fields (AEMFs) in response to contralaterally and ipsilaterally presented 1 kHz tone bursts were recorded from the right hemisphere of 12 subjects with normal hearing in two replicate sessions several days apart. Three long-latency components of the AEMF were studied, occurring at latencies near 50 msec (P1m), near 100 msec (N1m) and near 165 msec (P2m). A spherical model of the head was used to fit equivalent-current dipoles to the data. Statistical analysis of dipole parameters revealed virtually no differences between the two testing sessions. The variability between sessions had a mean absolute difference of 3 to 10 mm for the spatial parameters. Comparison of dipole parameters between components showed that there was a replicable, but nonsignificant, trend for a difference in the location of the N1m from contralateral vs. ipsilateral stimulation, and a statistically significant confirmation that the P2m is located anterior to the N1m for contralateral stimulation. Magnetic resonance images from each subject were used to locate the dipoles near the primary auditory cortex in the Sylvian fissure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01135440
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    Paper (German National Licenses)
    Fulltext
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