Results 61 to 70 of about 9,504 (208)

A Protocol for Messaging to Extraterrestrial Intelligence

, 2011
Messaging to extraterrestrial intelligence (METI) is a branch of study concerned with constructing and broadcasting a message toward habitable planets.
Ball, Baum, Baum, Baxter, Benford, Bostrom, Cocconi, Denning, Des Marais, Devito, Dimitra Atri, Drake, Drake, Goldsmith, Grinspoon, Haqq-Misra, Hart, Jacob Haqq-Misra, Julia DeMarines, Kaplan, Lemarchand, Lomberg, Michaud, Sagan, Scheffer, Shuch, Sless, Tarter, Vakoch, Vakoch, Vakoch, von Hoerner, Ward, Webb, Zaitsev   +34 more
core   +1 more source

Prebiotic Organic Chemistry of Diketopiperazines

Asian Journal of Organic Chemistry, Volume 15, Issue 4, April 2026.
Diketopiperazines (DKPs) are considered essential in many life forms, but their prebiotic importance has not been fully understood. This review aims to discuss prebiotic organic chemistry for experimentally and computationally simulated reactions involving DKPs. ABSTRACT Even though the significance of amino acids and polypeptides is well recognized in
Jun Ohata
wiley   +1 more source

A Proposal for Enhancing Technosignature Search toward the Galactic Center

The Astrophysical Journal
We discuss the possibility of enhancing intelligent life searches toward the Galactic center. From the clockwork orbital motions of stars around the Sgr A* black hole, we can determine the distance to the Galactic center at an exceptional accuracy ...
Naoki Seto
doaj   +1 more source

The SETI observational plan [PDF]

The SETI (Search for Extraterrestrial Intelligence) Project's primary thrust is to search the microwave region of the spectrum for signals of extraterrestrial intelligent origin.
Berman, A. L.
core   +1 more source

Optical SETI Observations of the Anomalous Star KIC 8462852

, 2015
To explore the hypothesis that KIC 8462852's aperiodic dimming is caused by artificial megastructures in orbit (Wright et al. 2015), rather than a natural cause such as cometary fragments in a highly elliptical orbit (Marengo et al.
Richards, Jon, Schuetz, Marlin, Shostak, Seth, Vakoch, Douglas A.   +3 more
core   +1 more source

Regularization via f‐Divergence: An Application to Multi‐Oxide Spectroscopic Analysis

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract In this paper, we explore the application of convolutional neural networks (CNNs) for predicting the chemical composition of complex geologic samples in a simulated Martian atmospheric environment. Specifically, we aim to characterize oxide weight percentages (wt.%) of rock samples analyzed by remote Laser‐Induced Breakdown Spectroscopy (LIBS),
Weizhi Li, Natalie Klein, Brendan Gifford, Elizabeth Sklute, Carey Legett, Samuel M. Clegg   +5 more
wiley   +1 more source

Exo–IPM Scattering as a Hidden Gatekeeper of Narrowband Technosignatures

The Astrophysical Journal
Narrowband radio technosignatures can be significantly modulated by the host star’s exoplanetary interplanetary medium (Exo-IPM), where turbulence in stellar winds and coronal mass ejections (CMEs) imprint spectral broadening.
Vishal Gajjar, Grayce C. Brown
doaj   +1 more source

A Numerical Testbed for Hypotheses of Extraterrestrial Life and Intelligence

, 2008
The search for extraterrestrial intelligence (SETI) has been heavily influenced by solutions to the Drake Equation, which returns an integer value for the number of communicating civilisations resident in the Milky Way, and by the Fermi Paradox, glibly ...
Annis, Cirkovic, D.H. Forgan, Hou, Mayor, Prialnik, Rocha-Pinto, Scalo, Ward   +8 more
core   +2 more sources

Characterizing Patterns of Drought Synchronicity in the Contiguous United States

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract Drought synchronicity, defined as the co‐occurrence of droughts across multiple regions within a specified temporal window, poses significant risks to agriculture, infrastructure, and ecosystems. Here, we investigate the regional and temporal dynamics of drought synchronicity across the contiguous United States (CONUS) from 1980 to 2021, using
Lisa Nguyen, Mohammed Ombadi
wiley   +1 more source

A Comprehensive Calibration Framework for the Northwest River Forecast Center

JAWRA Journal of the American Water Resources Association, Volume 62, Issue 2, April 2026.
ABSTRACT We present a comprehensive framework developed by the Northwest River Forecast Center for calibrating hydrologically diverse basins. The framework includes models for snow, soil moisture, routing, channel loss, and consumptive use. Data inputs include a wide range of open‐access datasets for meteorology, land use, topography, and land cover ...
Geoffrey Walters, Cameron Bracken, Brad Gillies, Leah Pope, Henry Pai, Sonali Chokshi, Victor Stegemiller, Stephen King, Julie Bracken, Taylor Dixon, Joe Intermill   +10 more
wiley   +1 more source