نتایج جستجو برای: submillimetre wave spectrum
تعداد نتایج: 432776 فیلتر نتایج به سال:
We study the spin-wave spectrum of the Heisenberg antiferromagnet on a bipartite lattice. The spin-wave spectrum on a Néel-ordered ground state is bounded as ε(k) ≤ c|k|, where c gives an upper bound for the spin-wave velocity. In the large-S limit, the upper bound c coincides with the result of the spin-wave theory.
The Effect of Breaking Waves on a Coupled Model of Wind and Ocean Surface Waves. Part I: Mature Seas
This is the first of a two-part investigation of a coupled wind and wave model that includes the enhanced form drag of breaking waves. In Part I here the model is developed and applied to mature seas. Part II explores the solutions in a wide range of wind and wave conditions, including growing seas. Breaking and nonbreaking waves induce air-side fluxes of momentum and energy above the air–sea i...
We present the first results of a deep unbiased submillimetre survey carried out at 450 and 850μm. We detected 12 sources at 850 μm, giving a surface density of sources with S850μm > 2.8 mJy of 0.49± 0.16 arcmin . The sources constitute 20-30% of the background radiation at 850μm and thus a significant fraction of the entire background radiation produced by stars. This implies, through the conn...
X-ray absorption near-edge spectroscopy (XANES) at the Mn K-edge was used to investigate the environment of Mn in situ within the growth increments of the long-lived freshwater bivalve species Diplodon chilensis patagonicus. Single XANES spectra and Mn Kalpha fluorescence distributions were acquired at submillimetre resolution (up to 100 microm x 50 microm), at Mn concentrations below the weigh...
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