Results 11 to 20 of about 14,449 (221)
New species in the Old World: Europe as a frontier in biodiversity exploration, a test bed for 21st century taxonomy. [PDF]
PLoS ONE, 2012 The number of described species on the planet is about 1.9 million, with ca. 17,000 new species described annually, mostly from the tropics. However, taxonomy is usually described as a science in crisis, lacking manpower and funding, a politically ...
Benoît Fontaine +50 more
doaj +1 more source
HIGH-PRECISION MICROWAVE SPECTROMETER WITH SUB-DOPPLER SPECTRAL RESOLUTION
Radio Physics and Radio Astronomy, 2014 Results of improvement of the automated millimeter-wave spectrometer of the Institute of Radio Astronomy NAS–Ukraine aimed at reaching a sub-Doppler resolution on the basis of the Lamb-dip observation are presented.
E. A. Alekseev +2 more
doaj +1 more source
Annales Geophysicae, 1999 Two aspects of solar MHD are discussed in relation to the work of the MHD simulation group at KIS. Photospheric magneto-convection, the nonlinear interaction of magnetic field and convection in a strongly stratified, radiating fluid, is a key process ...
M. Schüssler, M. Schüssler
doaj +1 more source
Bessel’s method in study of solar eclipse influence on the ionosphere
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023 Relevance. A solar eclipse is a global disturbing factor that significantly changes the characteristics of the ionosphere. As is known, the ionosphere affects the propagation of radio waves of all ranges, that is, it affects the operation of navigation ...
Yu. B. Mylovanov, V. L. Dorokhov
doaj +1 more source
Primary gamma ray selection in a hybrid timing/imaging Cherenkov array
EPJ Web of Conferences, 2017 This work is a methodical study on hybrid reconstruction techniques for hybrid imaging/timing Cherenkov observations. This type of hybrid array is to be realized at the gamma-observatory TAIGA intended for very high energy gamma-ray astronomy (> 30 TeV).
Postnikov E.B. +3 more
doaj +2 more sources
Synergies between exoplanet surveys and variable star research
EPJ Web of Conferences, 2017 With the discovery of the first transiting extrasolar planetary system back in 1999, a great number of projects started to hunt for other similar systems. Because the incidence rate of such systems was unknown and the length of the shallow transit events
Kovacs Geza
doaj +1 more source
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023 Urgency. The ionosphere remains the main channel used by radar, radio astronomy, radio navigation, communication links, and remote radio sounding. The parameters of this channel significantly depend on the influence of high-energy sources that take place
L. F. Chernogor +4 more
doaj +1 more source
Precisely determining photon-number in real time [PDF]
QuantumSuperconducting transition-edge sensors (TES) are extremely sensitive microcalorimeters used as photon detectors with unparalleled energy resolution.
Leonardo Assis Morais +9 more
doaj +1 more source
Cover Your Basis: Comprehensive Data-driven Characterization of the Binary Black Hole Population
The Astrophysical Journal, 2023 We introduce the first complete nonparametric model for the astrophysical distribution of the binary black hole (BBH) population. Constructed from basis splines, we use these models to conduct the most comprehensive data-driven investigation of the BBH ...
Bruce Edelman, Ben Farr, Zoheyr Doctor
doaj +1 more source
EXERCÍCIOS ENVOLVENDO A MAGNITUDE LIMITE NO ENSINO DE ASTRONOMIA
Ensaio Pesquisa em Educação em CiênciasNeste trabalho são apresentados alguns exercícios e atividades, elaborados para disciplinas de Astronomia Básica e inspirados na propos ta de exploração multicontextual de Ausubel, relacionando o conceito de magnitude limite ao poder de captação de luz ...
Lev Vertchenko +1 more
doaj +1 more source