Results 181 to 190 of about 288,189 (359)

Formation of the Leonid meteor stream and storm [PDF]

It is well known that some meteor showers display a very high level of activity at certain times, the most famous being the Leonid shower with very spectacular displays at roughly 33 year intervals.
Williams, I. P., Wu, Zidian
core   +1 more source

Gas Chromatography‐Mass Spectrometry Analysis, Genoprotective, and Antioxidant Potential of Curio radicans (L. f.) P.V. Heath

ChemistryOpen, EarlyView.
The ethyl acetate extract of Curio radicans is found to contain a higher proportion of bioactive compounds (55% vs 30% in the ethanolic extract) by gas chromatography‐mass spectrometry, and it exhibits stronger antioxidant activity in the DPPH assay (75% vs 65% inhibition) as well as clear genoprotective effects against H2O2‐induced DNA damage ...
Muhammad Naseer, Muhammad Adil, Sarir Ahmad, Mikhlid H. Almutairi, Abdulwahed Fahad Alrefaei, Sajid Ali, Fayaz Asad   +6 more
wiley   +1 more source

PHOTOGRAPHS OF HALLEY'S COMET MADE AT THE LICK OBSERVATORY [PDF]

, 1910
Heber D. Curtis
openalex   +1 more source

The study of comets, part 1 [PDF]

Papers are presented dealing with observations of comets. Topic discussed include: photometry, polarimetry, and astrometry of comets; detection of water and molecular transitions in comets; ion motions in comet tails; determination of comet brightness ...
Ahearn, M., Donn, B., Harrington, R., Jackson, W. M., Mumma, M. J.   +4 more
core   +1 more source

Systematic identification of existing core outcomes related to preterm birth and the development of a core outcome set for preterm birth in Aotearoa New Zealand

Pediatric Investigation, EarlyView.
We have used a systematic approach to determine a preterm birth core outcome set, informed by people with lived experience, perinatal healthcare professionals, and researchers. This will be recommended in preterm birth research and clinical care in Aotearoa New Zealand and for consideration internationally.
Briar Hunter, Lisa Dawes, Lynn Sadler, Jordon Wimsett, Sue Tutty, Matthew Moore, Malcolm R Battin, Katie M Groom   +7 more
wiley   +1 more source

Simultaneous Classification and Location of Volcanic Deformation in SAR Interferograms Using a Convolutional Neural Network

Earth and Space Science
With the evolution of interferometric synthetic aperture radar into a tool for active hazard monitoring, new methods are sought to quickly and automatically interpret the large number of interferograms that are created.
M. Gaddes, A. Hooper, F. Albino
doaj   +1 more source

XLVIII. Observations on the nature of the new celestial body discovered by Dr. Olbers; and of the comet which was expected to appear last January in its return from the Sun [PDF]

William Herschel
openalex   +1 more source

Detailed Opacity Calculations for Stellar Models

, 2018
Radiative opacity is an important quantity in the modeling of stellar structure and evolution. In the present work we recall the role of opacity in the interpretation of pulsations of different kinds of stars.
Comet, Maxime, Gilleron, Franck, Pain, Jean-Christophe   +2 more
core  

Carbon Fiber‐Reinforced Silicon Carbide (C/C‐SiC) Fabrication Derived From Polyetherketoneketone (PEKK) as an Alternative Thermoplastic Carbon Precursor

Journal of Polymer Science, EarlyView.
ABSTRACT This study shows the first successful fabrication of a carbon fiber‐reinforced silicon carbide (C/C‐SiC) via the liquid silicon infiltration process using two thermoplastic polyetherketoneketone (PEKK) powders as carbon precursors. Samples are analyzed after each processing step and compared to polyetheretherketone (PEEK)‐derived reference ...
Melissa Moos, Jalena Best, Stefan Flauder, Steve R. Nutt, Nico Langhof, Stefan Schafföner   +5 more
wiley   +1 more source

Observations of the Spectrum of Comet 1879 d (Palisa) [PDF]

, 1879
L. Lindsay
openalex   +1 more source