Results 41 to 50 of about 3,080 (302)
Meteor stream identification: a new approach. Application to 3675 radio meteors [PDF]
, 1999 The new criterion DN for meteoroid streams identification, based on variables directly linked to observations, was applied to a set of radio meteors observed in Adelaide. 28 streams, combinning 28% of the 3675 orbits have been detected.
Valsecchi, G.B. +2 more
core
Autonomous spectrographic system to analyse the main elements of fireballs and meteors
Earth, Planets and Space, 2018 We present a meteor observation system based on imaging CCD cameras, wide-field optics and a diffraction grating. This system is composed of two independent spectrographs with different configurations, which allows us to capture images of fireballs and ...
Francisco Ángel Espartero +4 more
doaj +1 more source
The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory
Astronomische Nachrichten, EarlyView.ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth +20 more
wiley +1 more source
Meteors in Australian Aboriginal dreamings [PDF]
, 2010 We present a comprehensive analysis of Australian Aboriginal accounts of meteors. The data used were taken from anthropological and ethnographic literature describing oral traditions, ceremonies, and Dreamings of 97 Aboriginal groups representing all ...
Hamacher, Duane W. +1 more
core
Cheek tooth extraction in geriatric versus non‐geriatric horses
Equine Veterinary Journal, EarlyView.Abstract Background Age‐related dental changes are major contributors to dental disorders in older horses, and cheek tooth extractions are often required to maintain masticatory function and oral comfort. However, limited information is available on clinical and treatment characteristics in this older patient population.
Elias Mair +4 more
wiley +1 more source
Orbits of photographic meteors [PDF]
, 1967 Photographic observations of meteors and orbit ...
Mc Crosky, R. E.
core +1 more source
Nuevo mundo - Mundos Nuevos, 2021 During the 1820s and 1830s in the River Plate, a series of newspapers named after atmospheric phenomenons came to light: El Pampero (1822 y 1829), El Aguacero (1823), El Rayo (1826, 1831, 1833), El Granizo (1827), El Relámpago (1831, 1833), El Trueno ...
María Laura Romano
doaj +1 more source
Geological Journal, EarlyView.Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley +1 more source
Journal of International Development, EarlyView.ABSTRACT This study examines why some evaluation agencies and departments of bilateral aid donors report more unintended effects than others. It does so by analysing Belgian, Dutch and German evaluation practices. Using a comparative political economy approach, it evaluates the rigour and independence vis‐à‐vis implementers of their systems.
Dirk‐Jan Koch +2 more
wiley +1 more source