Results 41 to 50 of about 1,901,618 (330)
Forest cover estimation in Ireland using radar remote sensing: a comparative analysis of forest cover assessment methodologies [PDF]
, 2015 Quantification of spatial and temporal changes in forest cover is an essential component of forest monitoring programs. Due to its cloud free capability, Synthetic Aperture Radar (SAR) is an ideal source of information on forest dynamics in countries ...
Barrett, Brian +5 more
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An essential spectra mapping theorem
Journal of Mathematical Analysis and Applications, 1976 AbstractLet T be a closed operator on a Hilbert Space H, such that α ϵ p(T), the resolvent of T. Set A = (T − αI)−1. For μ ≠ 0, define λ such that (λ − α)μ = 1. It is shown that λ ϵ essential spectra of T iff μ ϵ essential spectra of A for various definitions of the essential spectra. A number of immediate corollaries are then derived.
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Essential Maps and Embeddings of Annuli in Nonorientable M 3 [PDF]
Proceedings of the American Mathematical Society, 1974 In this note we give an example which shows that the existence of an essential map of an annulus in a nonorientable 3 3 -manifold does not guarantee the existence of an essential embedding in that manifold.
R. J. Daigle, C. D. Feustel
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Nature Conservation, 2018 The flora in Xinjiang is unique. Decisions about biodiversity conservation and management based on seed plant diversity hotspots and conservation gaps in Xinjiang are essential to maintain this unique flora.
Jihong Huang +8 more
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Seismic risk quantification and GIS-based seismic risk maps for Dubai-UAE_Dataset
Data in Brief, 2021 The data provided in this article quantifies the potential seismic losses in multi-story buildings located in Dubai, UAE. Besides, it developed GIS-based seismic risk maps, which form essential inputs towards the seismic resilience of buildings.
Mohammad AlHamaydeh +3 more
doaj +1 more source
Enhanced visualisation of dance performance from automatically synchronised multimodal recordings [PDF]
, 2011 The Huawei/3DLife Grand Challenge Dataset provides multimodal recordings of Salsa dancing, consisting of audiovisual streams along with depth maps and inertial measurements.
Gowing, Marc +2 more
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On essential singularities of meromorphic mappings
Mathematische Annalen, 1989 The three notions ``essential singularity of the i-th kind, \(i=1,2,3''\) of a meromorphic mapping are introduced: A meromorphic mapping \(f: X\to Y\), where \(X^ *\), Y are normal complex spaces and \(X\subset X^ *\) is an open subset, is said to have an essential singularity of the i-th kind in a point P lying on the border of X if f doesn't admit ...
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Partially Isometric Immersions and Free Maps
, 2010 In this paper we investigate the existence of ``partially'' isometric immersions. These are maps f:M->R^q which, for a given Riemannian manifold M, are isometries on some sub-bundle H of TM.
D'Ambra, Giuseppina +2 more
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The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
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On ω-essential mappings onto manifolds [PDF]
Fundamenta Mathematicae, 1991 Essential mappings have played an important role in homotopy theory as well as in continua theory. A mapping \(f: X\to M\) from a compactum into a manifold is said to be essential provided every admissible deformation of \(f\) is surjective, while a mapping \(f: X\to M\) is said to be \(\omega\)- essential provided that \(f\times \hbox{id}_ k: X\times ...
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