نتایج جستجو برای: core velocity
تعداد نتایج: 352646 فیلتر نتایج به سال:
The universal criterion for ultrafast vortex-core switching between the up- and down-core bistates in soft magnetic nanodots is investigated by micromagnetic simulations along with vortex-core switching that occurs whenever the velocity of vortex-core motion reaches its critical velocity, upsilon cri = (1.66 +/- 0.18) gamma mean square root of Aex (e.g., upsilon cri = 330 +/- 37 m/s for Permall...
We analyze 9 open clusters with ages in the range 70Myr to 3.2Gyr using UCAC2 proper motion data and 2MASS photometry, which allows us to reach stellar masses down to ≈ 0.7M⊙. We employ in this work an approach in which the background proper motion contribution is statistically subtracted in order to obtain the cluster’s intrinsic proper motion distribution. For each cluster we consider the pro...
[1] We study seismic velocity and attenuation structures in the top 400 km of the Earth’s inner core based on modeling of differential traveltimes, amplitude ratios, and waveforms of the PKiKP-PKIKP phases observed at the epicentral distance range of 120 –141 and the PKPbc-PKIKP phases observed at the distance range of 146 –160 along equatorial paths. Our data are selected from the seismograms ...
Hexagonal close-packed iron (hcp-Fe) is a main component of Earth's inner core. The difference in density between hcp-Fe and the inner core in the Preliminary Reference Earth Model (PREM) shows a density deficit, which implies an existence of light elements in the core. Sound velocities then provide an important constraint on the amount and kind of light elements in the core. Although seismolog...
Water saturation determination is one of the most important tasks in reservoir studies to predict oil and gas in place needed to be calculated with more accuracy. The estimation of this important reservoir parameter is commonly determined by various well logs data and by applying some correlations that may not be so accurate in some real practical cases, especially for carbonate reservoirs. Sin...
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