Results 71 to 80 of about 613 (243)

Chelyabinsk Meteoroid Acoustic Effects [PDF]

Radio physics and radio astronomy, 2017
Purpose: The parameters (period, time delay, celerity, duration, and the rate of attenuation) of the acoustic signal which was generated during the Chelyabinsk meteoroid passage and explosion on February 15, 2013 are investigated along with atmospheric parameters.
openaire   +2 more sources

Stable Isotope Analysis as a Tool to Prevent Illicit Wildlife Trade of Songbirds in Brazil

Animal Conservation, EarlyView.
Feather isotopes provide clear differences between wild and captive songbirds in Brazil. Combining multiple isotopes improved classification accuracy and revealed individuals falsely declared as captive‐bred. These results demonstrate the potential of isotope analysis to detect wildlife laundering in the bird trade.
Luiza Brasileiro, Fábio J. V. Costa, Paulo R. R. Ramos, Vladimir E. Costa, Gabriela B. Nardoto   +4 more
wiley   +1 more source

Modeling the Meteoroid Environment Far from the Ecliptic Plane

The Planetary Science Journal
We describe a new version (numbered 3.1) of NASA’s Meteoroid Engineering Model, in which we extend the model to handle locations that lie more than a few degrees in latitude off the ecliptic plane.
Althea V. Moorhead, Petr Pokorný, Marcus A. Holden, William Kosmann   +3 more
doaj   +1 more source

Investigating relationships among strontium, barium, and seasonality in wild baboons

Archaeometry, EarlyView.
Abstract Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium‐normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O ...
Maya Bharatiya, Christine Austin, Manish Arora, Janaína N. Ávila, Esme K. Beamish, Wendy Dirks, Daniel R. Green, Nicole D. Leonard, W. Scott McGraw, Larissa Swedell, Ian S. Williams, Jian‐xin Zhao, Tanya M. Smith   +12 more
wiley   +1 more source

Mare versus highland lunar impact flash light curve dichotomy

Astronomy & Astrophysics
We performed a comprehensive analysis of lunar impact flash (LIF) light curve shapes and their dependence on the lunar terrain, using the large sample of LIFs detected by NELIOTA over the last 9 years. We classified 124 multi-frame light curves into mare,
Athanasopoulos D., Liakos A., Bonanos A. Z., Koschny D., Sykioti O., Devogèle M., Cano J. L., Moissl R.   +7 more
doaj   +1 more source

The mesospheric metal layer topside: a possible connection to meteoroids [PDF]

Atmospheric Chemistry and Physics, 2004
In the past, many studies have been carried out to demonstrate the influence of meteoroids on the atmospheric metal layer, observed roughly in the altitude range 80–105 km.
J. Höffner, J. S. Friedman
doaj  

Provisioning a Silk Road City: Herd Management Strategies at the Urban Site of Dzhankent, Kazakhstan

Archaeometry, EarlyView.
ABSTRACT This study presents evidence for herd management at the early medieval city of Dzhankent in southern Kazakhstan. Located along the Northern Silk Road, Dzhankent was a key trading node linking northern and southern areas between the 9th and 10th centuries ce.
Kara Larson, Iride Tomažič, A. Haruda, A. Tazhekeyev, S. Bilalov, H. Härke, I. Arzhantseva, Alicia R. Ventresca‐Miller   +7 more
wiley   +1 more source

Evaporation of high speed sporadic meteors [PDF]

Atmospheric Chemistry and Physics, 2004
Recent measurements conducted at the Arecibo Observatory report high-speed sporadic meteors having velocities near 50 km/s. The results seem to indicate a bimodal velocity distribution in the sporadic meteors (maxima at ~20 km/s and ~50 km/s).
E. Murad, C. Roth
doaj  

Metals from spacecraft reentry in stratospheric aerosol particles. [PDF]

Proc Natl Acad Sci U S A, 2023
Murphy DM, Abou-Ghanem M, Cziczo DJ, Froyd KD, Jacquot J, Lawler MJ, Maloney C, Plane JMC, Ross MN, Schill GP, Shen X.   +10 more
europepmc   +1 more source

Story2Board: A Training‐Free Approach for Expressive Visual Storytelling

Computer Graphics Forum, EarlyView.
Abstract We present Story2Board, a training‐free framework for expressive storyboard generation from natural language. Existing methods narrowly focus on subject identity, overlooking key aspects of visual storytelling such as spatial composition, background evolution, and narrative pacing.
D. Dinkevich, M. Levy, O. Avrahami, D. Samuel, D. Lischinski   +4 more
wiley   +1 more source