منابع مشابه
Turbulence Spectra from Doppler-shifted Spectral Lines
Turbulence is a key element of the dynamics of astrophysical fluids, including those of interstellar medium, clusters of galaxies and circumstellar regions. Turbulent motions induce Doppler shifts of observable emission and absorption lines. In the review we discuss new techniques that relate the spectra of underlying velocity turbulence and spectra of Doppler-shifted lines. In particular, the ...
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Three-dimensional classification of urban features is one of the important tools for urban management and the basis of many analyzes in photogrammetry and remote sensing. Therefore, it is applied in many applications such as planning, urban management and disaster management. In this study, dense point clouds extracted from dense image matching is applied for classification in urban areas. Appl...
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As is well known, it is our manifest destiny as 21st century algebraic topologists to compute homotopy groups of spheres. This noble venture began even before the notion of homotopy was around. In 1931, Hopf was thinking about a map he had encountered in geometry from S to S and wondered whether or not it was essential. He proved that it was by considering the linking of the fibers. After Hurew...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1959
ISSN: 0004-6280,1538-3873
DOI: 10.1086/127421