Results 81 to 90 of about 172,919 (265)

Multi‐scale maternal behavioral responses by white‐tailed deer to coyote predation risk

The Journal of Wildlife Management, EarlyView.
In the piedmont region of the southeastern US, white‐tailed deer adjust maternal care strategies in response to variation in risk of encountering coyotes. In areas frequented by coyotes, adult female deer (i.e., does) increase their use of space, likely to avoid drawing coyotes to the location where a fawn is hidden.
Michael S. Muthersbaugh, Wesley W. Boone, Elizabeth A. Saldo, Alex J. Jensen, Charles Ruth, Jay Cantrell, John C. Kilgo, David S. Jachowski   +7 more
wiley   +1 more source

X-ray Pulsar Signal Denoising Based on Variational Mode Decomposition

Entropy, 2021
Pulsars, especially X-ray pulsars detectable for small-size detectors, are highly accurate natural clocks suggesting potential applications such as interplanetary navigation control.
Qiang Chen, Yong Zhao, Lixia Yan
doaj   +1 more source

LOFAR Discovery of a 23.5 s Radio Pulsar [PDF]

Astrophysical Journal, 2018
We present the discovery of PSR J0250+5854, a radio pulsar with a spin period of 23.5 s. This is the slowest-spinning radio pulsar known. PSR J0250+5854 was discovered by the LOFAR Tied-Array All-Sky Survey (LOTAAS), an all-northern-sky survey for ...
C. Tan, C. Bassa, S. Cooper, T. J. Dijkema, P. Esposito, J. Hessels, V. Kondratiev, M. Kramer, D. Michilli, S. Sanidas, T. Shimwell, B. Stappers, J. V. Leeuwen, I. Cognard, J. Grießmeier, A. Karastergiou, E. Keane, C. Sobey, P. W. J. B. C. F. Astrophysics, S. O. Physics, Astronomy, U. Manchester, Manchester, Uk, Astron, The Netherlands Institute for Radio Astronomy, The Netherlands., A. S. M. F. Astronomy, U. Amsterdam, Amsterdam, I. D. F. Cosmica, Milano, Italy, A. Centre, L. Institute, R. A. O. Sciences, Moscow, Russia., Max Planck Institut fur Radioastronomie, Germany, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace, Universit'e d'Orl'eansCNRS, France, Station de radioastronomie de Nanccay, O. Paris, Cnrsinsu, O. Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, Department of Applied Physics, U. W. Cape, S. Africa, Electronics, Rhodes University, Ska Organisation, Jodrell Bank Observatory, I. C. F. R. A. R. -. C. University, Australia., C. Astronomy, S. Science   +60 more
semanticscholar   +1 more source

X-ray emission from PSR J1809-1917 and its pulsar wind nebula, possibly associated with the TeV gamma-ray source HESS J1809-193

, 2007
We detected X-ray emission from the 50-kyr-old pulsar J1809-1917 and resolved its pulsar wind nebula (PWN) with Chandra. The pulsar spectrum fits PL+BB model with the photon index of 1.2 and the BB temperature of 2 MK for n_{H}=0.7\times 10^{22} cm^{-2}.
G. G. Pavlov, Kargaltsev O., O. Kargaltsev, Sanwal D., Teter M. A.   +4 more
core   +1 more source

A Perspective of Multi‐Reflecting TOF MS

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Time‐of‐flight mass spectrometry (TOF MS) excels in rapid and high‐sensitivity analysis, making it a cornerstone of analytical chemistry. But as sample complexity explodes in omics studies, so does the need for higher resolving power to ensure accurate results.
A. N. Verenchikov, V. V. Makarov, A. V. Vorobyev, S. N. Kirillov   +3 more
wiley   +1 more source

Predicting Pulsars from Imbalanced Dataset with Hybrid Resampling Approach

Advances in Astronomy, 2021
Pulsar stars, usually neutron stars, are spherical and compact objects containing a large quantity of mass. Each pulsar star possesses a magnetic field and emits a slightly different pattern of electromagnetic radiation which is used to identify the ...
Ernesto Lee, Furqan Rustam, Wajdi Aljedaani, Abid Ishaq, Vaibhav Rupapara, Imran Ashraf   +5 more
doaj   +1 more source

Searching for gravitational waves from the Crab pulsar - the problem of timing noise [PDF]

, 2003
Of the current known pulsars, the Crab pulsar (B0531+21) is one of the most promising sources of gravitational waves. The relatively large timing noise of the Crab causes its phase evolution to depart from a simple spin-down model.
, Abbott B (The LIGO Scientific Collaboration), Dupuis R Woan G, Graham Woan, Jaranowski P, Jones D I, Lyne A, Matthew Pitkin   +7 more
core   +3 more sources

Massenbegriffe auf dem Prüfstand: Die drei Facetten der Masse

Physik in unserer Zeit, EarlyView.
Masse ist die primäre Eigenschaft, die man physikalischen Körpern zuordnet. Da die Masse verschiedene Rollen übernimmt – so reagiert sie nicht nur auf ein Gravitationsfeld, sie erzeugt auch eines –, müssen diese verschiedenen Rollen und darauf aufbauend die verschiedenen Massenbegriffe genauer analysiert werden.
Eva Hackmann, Claus Lämmerzahl
wiley   +1 more source

Pulsar Signal Adaptive Surrogate Modeling

Aerospace
As the number of spacecraft heading beyond Earth’s orbit increased in recent years, autonomous navigation solutions have become increasingly important. One such solution is pulsar-based navigation.
Tomáš Kašpárek, Peter Chudý
doaj   +1 more source

European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background [PDF]

, 2015
We present new limits on an isotropic stochastic gravitational-wave background (GWB) using a six pulsar dataset spanning 18 yr of observations from the 2015 European Pulsar Timing Array data release.
L. Lentati, Stephen R. Taylor, C. Mingarelli, A. Sesana, S. Sanidas, A. Vecchio, R. N. Caballero, K. J. Lee, R. V. Haasteren, S. Babak, C. Bassa, P. Brem, M. Burgay, D. Champion, I. Cognard, G. Desvignes, J. Gair, L. Guillemot, J. Hessels, Gemma H. Janssen, R. Karuppusamy, Michael Kramer, A. Lassus, P. Lazarus, Kuo Liu, S. Osłowski, D. Perrodin, A. Petiteau, A. Possenti, M. Purver, P. Rosado, R. Smits, B. Stappers, G. Theureau, C. Tiburzi, J. Verbiest   +35 more
semanticscholar   +1 more source