Results 31 to 40 of about 30,812 (255)
Annals of the New York Academy of Sciences, Volume 1519, Issue 1, Page 7-19, January 2023., 2023 We review the long‐term climate variations during the last 540 million years (Phanerozoic Eon). We first summarize the geological and geochemical datasets available for reconstruction of long‐term climate variations. We then explore the main drivers of climate that appear to explain a large fraction of these climatic oscillations. The first is the long‐
Nir J. Shaviv +2 more
wiley +1 more source
Journal of Biogeography, Volume 49, Issue 8, Page 1420-1442, August 2022., 2022 Abstract Aim Climate change is expected to impact mountain biodiversity by shifting species ranges and the biomes they shape. The extent and regional variation in these impacts are still poorly understood, particularly in the highly biodiverse Andes. Regional syntheses of climate change impacts on vegetation are pivotal to identify and guide research ...
Carolina Tovar +24 more
wiley +1 more source
GASS High Velocity Clouds in the Region of the Magellanic Leading Arm [PDF]
, 2012 We present a catalog of high-velocity clouds in the region of the Magellanic Leading Arm. The catalog is based on neutral hydrogen (\HI) observations from the Parkes Galactic All-Sky Survey (GASS).
Begum +31 more
core +1 more source
Guanaco colonisation of Tierra del Fuego Island from mainland Patagonia: Walked, swam, or by canoe?
Geo: Geography and Environment, Volume 9, Issue 2, July‐December 2022., 2022 A geographical and biological puzzle that has perplexed scientists since the late 1800s working in southern South America: why are there so few vertebrates on the island of Tierra del Fuego compared to the adjacent Patagonia mainland, including the absence of the ubiquitous Guanaco (Lama guanicoe), wild camelid of the south? An interdisciplinary search
William L. Franklin
wiley +1 more source
Diversity and Distributions, Volume 27, Issue 11, Page 2277-2296, November 2021., 2021 Abstract Aim Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories.
María José Frugone +20 more
wiley +1 more source
Comparison of Rutherford's atomic model with the Standard Model of particle physics and other models
Journal of the Royal Society of New Zealand, Volume 51, Issue 3-4, Page 538-556, September ‐ December 2021., 2021 ABSTRACT Ernest Rutherford is known almost universally as the discoverer of the structure of the atom. He is less well known for his discovery of the proton. Even less well known is a set of hypotheses on the structure of matter that was proposed by Newton 300 years ago.
Philip Yock
wiley +1 more source
Odessa Astronomical Publications, 2014 A thorough study of the correlation between P1=P0 ratio, fundamental period, and chemical composition (abundances of metals that compose Z) was conducted to investigate the significance of the iron-peak elements on the ratio. The results suggested a more
F. A. Chekhonadskikh +2 more
doaj +1 more source
An efficient way to use MS‐CLEAN associated with Shannon's entropy
IET Image Processing, Volume 15, Issue 10, Page 2319-2331, August 2021., 2021 Abstract This article covers deconvolution methods in the context of radio astronomical images. A new formulation is proposed to deal with negative brightness, deconvoluting separately the positive and negative brightness of the sky. The positive brightness is physically possible, but negative brightness is a degradation product.
Ramon G. Campos, Evandro O. T. Salles
wiley +1 more source
New 20-cm radio-continuum study of the small Magellanic cloud: Part I. Images [PDF]
Serbian Astronomical Journal, 2011 We present and discuss new high-sensitivity and resolution radiocontinuum images of the Small Magellanic Cloud (SMC) at λ=20 cm (ν=1.4 GHz). The new images were created by merging 20-cm radio-continuum archival data, from the Australian ...
Wong G.F. +6 more
doaj +3 more sources
Identification of the OGLE Blazars behind the Large and Small Magellanic Clouds
Galaxies, 2017 We report the selection of blazar candidates behind the Large and Small Magellanic Clouds. Both flat spectrum radio quasar and BL Lacreate objects were selected based on the long-term, multi-colour Optical Gravitational Lensing Experiment photometric ...
Natalia Żywucka +6 more
doaj +1 more source