Results 11 to 20 of about 397,713 (267)
STARS Enabled Integrated Sensing and Communications [PDF]
IEEE Transactions on Wireless Communications, 2022 A simultaneously transmitting and reflecting surface (STARS) enabled integrated sensing and communications (ISAC) framework is proposed, where the entire space is partitioned by STARS into a sensing space and a communication space.
Zhao-Jie Wang, Xidong Mu, Yuanwei Liu
semanticscholar +1 more source
EVOLUTION OF THE STARS AND GAS IN GALAXIES. [PDF]
, 2022 Essentially everything of astronomical interest is either part of a galaxy, or from a galaxy, or otherwise relevant to the origin or evolution of galaxies. Diverse examples are that the isotropic composition of meteorites provides clues to the history of
B. Tinsley
semanticscholar +1 more source
Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2 [PDF]
Astronomical Journal, 2018 For the vast majority of stars in the second Gaia data release, reliable distances cannot be obtained by inverting the parallax. A correct inference procedure must instead be used to account for the nonlinearity of the transformation and the asymmetry of
C. Bailer-Jones +4 more
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The single star path to Be stars [PDF]
Astronomy & Astrophysics, 2020 Context. Be stars are rapidly rotating B main sequence stars that show line emission due to an outflowing disc. By studying the evolution of rotating single star models, we can assess their contribution to the observed Be star populations. Aims. We identify the main effects that cause single stars to approach critical rotation as functions of initial ...
Ben Hastings, Chen Wang, Norbert Langer
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Seeing Stars: Exploiting Class Relationships for Sentiment Categorization with Respect to Rating Scales [PDF]
Annual Meeting of the Association for Computational Linguistics, 2005 We address the rating-inference problem, wherein rather than simply decide whether a review is "thumbs up" or "thumbs down", as in previous sentiment analysis work, one must determine an author's evaluation with respect to a multi-point scale (e.g., one ...
B. Pang, Lillian Lee
semanticscholar +1 more source
Binary Companions of Evolved Stars in APOGEE DR14: Search Method and Catalog of ∼5000 Companions [PDF]
Astronomical Journal, 2018 Multi-epoch radial velocity measurements of stars can be used to identify stellar, substellar, and planetary-mass companions. Even a small number of observation epochs can be informative about companions, though there can be multiple qualitatively ...
A. Price-Whelan +12 more
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MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS [PDF]
, 2013 We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar.
B. Paxton +10 more
semanticscholar +1 more source
Evidence for quark-matter cores in massive neutron stars [PDF]
Nature Physics, 2019 The theory governing the strong nuclear force—quantum chromodynamics—predicts that at sufficiently high energy densities, hadronic nuclear matter undergoes a deconfinement transition to a new phase of quarks and gluons1.
Eemeli Annala +4 more
semanticscholar +1 more source
INTRINSIC COLORS, TEMPERATURES, AND BOLOMETRIC CORRECTIONS OF PRE-MAIN-SEQUENCE STARS [PDF]
, 2013 We present an analysis of the intrinsic colors and temperatures of 5–30 Myr old pre-main-sequence (pre-MS) stars using the F0- through M9-type members of nearby, negligibly reddened groups: the η Cha cluster, the TW Hydra Association, the β Pic Moving ...
M. Pecaut, E. Mamajek
semanticscholar +1 more source
On stars and Steiner stars. II [PDF]
Proceedings of the Twentieth Annual ACM-SIAM Symposium on Discrete Algorithms, 2009 A {\em Steiner star} for a set $P$ of $n$ points in $\RR^d$ connects an arbitrary center point to all points of $P$, while a {\em star} connects a point $p\in P$ to the remaining $n-1$ points of $P$. All connections are realized by straight line segments. Fekete and Meijer showed that the minimum star is at most $\sqrt{2}$ times longer than the minimum
Adrian Dumitrescu +2 more
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