Journal ArticleDOI
Where are they
Mario Livio,Joseph Silk +1 more
Reads0
Chats0
TLDR
The search for extraterrestrial life is increasingly informed by their knowledge of exoplanets, and within three decades, the authors may know whether extrasolar life is rare.Abstract:
The search for extraterrestrial life is increasingly informed by our knowledge of exoplanets. Within three decades, we may know whether extrasolar life is rare.read more
Citations
More filters
Journal ArticleDOI
Moving beyond Kučera and Francis: A critical evaluation of current word frequency norms and the introduction of a new and improved word frequency measure for American English
Marc Brysbaert,Boris New +1 more
TL;DR: The size of the corpus, the language register on which the corpus is based, and the definition of the frequency measure were investigated, finding that lemma frequencies are not superior to word form frequencies in English and that a measure of contextual diversity is better than a measure based on raw frequency of occurrence.
Proceedings ArticleDOI
A projection based approach for radar and telecommunication systems coexistence
TL;DR: By optimal choice of the number of antennas, the performance and target identification capabilities of radar in the method are competitive with that of traditional radar waveforms, while simultaneously guaranteeing coexistence between radar and communication systems.
Journal ArticleDOI
Meaning matters: Polysemy in Advertising
TL;DR: A cross-disciplinary perspective on advertising polysemy, with examples from research and practice, to explain the conditions that lead to the emergence of multiple interpretations for the same message is provided in this article.
Journal ArticleDOI
Chapter 2 Resisting Unlearning: Understanding Science Education’s Response to the United States’s National Accountability Movement:
TL;DR: The assessment head for the state Department of Education (DOE) travels across town to present a lecture to the university's science education faculty as discussed by the authors, and the room feels a bit uncomfortable because DOE staff and professors seldom speak formally or informally.
References
More filters
Journal ArticleDOI
A terrestrial planet candidate in a temperate orbit around Proxima Centauri
Guillem Anglada-Escudé,Pedro J. Amado,John R. Barnes,Z. M. Berdiñas,R. Paul Butler,Gavin A. L. Coleman,Ignacio de la Cueva,Stefan Dreizler,Michael Endl,Benjamin Giesers,Sandra V. Jeffers,James S. Jenkins,Hugh R. A. Jones,Marcin Kiraga,Martin Kürster,Marίa J. López-González,Christopher Marvin,Nicolás Morales,Julien Morin,Richard P. Nelson,Jose Luis Ortiz,Aviv Ofir,Sijme-Jan Paardekooper,Ansgar Reiners,E. Rodriguez,Cristina Rodrίguez-López,L. F. Sarmiento,J. B. P. Strachan,Yiannis Tsapras,Mikko Tuomi,Mathias Zechmeister +30 more
TL;DR: Observations reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units.
Journal ArticleDOI
The Occurrence of Potentially Habitable Planets Orbiting M Dwarfs Estimated from the Full Kepler Dataset and an Empirical Measurement of the Detection Sensitivity
TL;DR: In this article, the authors presented an improved estimate of the occurrence rate of small planets orbiting small stars by searching the full four-year Kepler data set for transiting planets using their own planet detection pipeline and conducting transit injection and recovery simulations to empirically measure the search completeness of their pipeline.
Journal ArticleDOI
Search for Artificial Stellar Sources of Infrared Radiation
TL;DR: It is proposed that a search for sources of infrared radiation should accompany the recently initiated search for interstellar radio communications.
Journal ArticleDOI
The life span of the biosphere revisited.
Ken Caldeira,James F. Kasting +1 more
TL;DR: A more elaborate model that includes a more accurate treatment of the greenhouse effect of CO2, a biologically mediated weathering parameterization, and the realization that C4 photosynthesis can persist to much lower concentrations of atmospheric CO2 is found to find that a C4-plant-based biosphere could survive for at least another 0.9 Gyr to 1.5 Gyr after the present time.