Results 31 to 40 of about 258,281 (280)
Comisión a la isla de Malpelo (fosfatos)
Boletín Geológico, 1953 Este informe trata de una exploración a la Isla de Malpelo con el objeto de buscar fosfatos de origen animal y su manera de explotación. Después de hacer una descripción litológica de las formaciones que se encontraron, que son de origen ígneo, se ...
Alberto Sarmiento Alarcón
doaj +1 more source
A relativistic Glauber approach to polarization transfer in 4He(\vec{e},e'\vec{p})
, 2005 Polarization-transfer components for 4He(\vec{e},e'\vec{p})3H are computed within the relativistic multiple-scattering Glauber approximation (RMSGA). The RMSGA framework adopts relativistic single-particle wave functions and electron-nucleon couplings ...
Arnold +10 more
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Catálogo de los volcanes activos en Colombia
Boletín Geológico, 1989 Por medio de este catálogo se tratará de consignar la mayor información posible de los volcanes activos existentes en el país. Consta de la recopilación de los diferentes trabajos realizados hasta el momento en los volcanes colombianos, complementados
Ricardo Arturo Méndez Fajury
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Icelandic analogs to Martian flood lavas [PDF]
, 2004 We report on new field observations from Icelandic lava flows that have the same surface morphology as many Martian flood lava flows. The Martian flood lavas are characterized by a platy-ridged surface morphology whose formation is not well understood ...
Guilbaud, M. N. +6 more
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Arthritis Care &Research, EarlyView.Objective Imaging evidence of active sacroiliitis is important for diagnosis, classification, and monitoring of axial spondyloarthritis (axSpA). However, there is no consistent guidance on whether patients should temporarily stop nonsteroidal anti‐inflammatory drugs (NSAIDs) before magnetic resonance imaging (MRI).
Gareth T. Jones +10 more
wiley +1 more source
Western Journal of Emergency Medicine, 2023 Introduction: While windlass-rod style tourniquets stop bleeding in limbs when used by skilled responders, they are less successful in the hands of the untrained or not recently trained public.
Craig Goolsby +6 more
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A lava attack on the recovery of sums of dense and sparse signals [PDF]
, 2015 Common high-dimensional methods for prediction rely on having either a sparse signal model, a model in which most parameters are zero and there are a small number of non-zero parameters that are large in magnitude, or a dense signal model, a model with ...
Chernozhukov, Victor +2 more
core +3 more sources
Chemically Driven Nano‐Elastic Heterogeneities Control Fragility in Volcanic Melts
Advanced Science, EarlyView.The study elucidates how nanoscale structural heterogeneity governs the mechanical behavior of volcanic glasses across compositions from basalt to rhyolite. Using a physicochemical framework, correlation length (ξ) and microscopic free volume (Vc) are derived from vibrational and physical properties, revealing systematic trends with silica content that
Michele Cassetta +13 more
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Comparison of Microbial Diversity of Two Typical Volcanic Soils in Wudalianchi, China
MicroorganismsVolcanic lava is an excellent model of primary succession, in which basalt-associated microorganisms drive the cycling of different elements such as nitrogen, carbon, and other nutrients. Microbial communities in volcanic soils are of particular interest
Qingyang Huang +7 more
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American Journal of Botany, EarlyView.Abstract Premise: While range expansion is hypothesized to be a mechanism for species persistence under climate change, many eco‐evolutionary models describe demographic and genetic processes during expansion that may increase genetic drift, decrease genetic variation, and ultimately decrease relative fitness at the leading edge.
Mackenzie Urquhart‐Cronish +5 more
wiley +1 more source