Results 41 to 50 of about 47,514 (302)

Integrating ZnO/Ag2O@g‐C3N4‐Based Nanocomposites Into a Carrageenan Matrix to Efficiently Remove Heavy Metals From Water

Advanced Materials Interfaces, EarlyView.
ABSTRACT This research focused on characterizing graphitic carbon nitride (g‐C3N4) nanocomposites incorporated with ZnO and Ag2O nanoparticles, and carrageenan to remove heavy metals. The ZnO/Ag2O@ g‐C3N4 and ZnO/Ag2O/g‐C3N4@Carr nanocomposites demonstrated thermal stability of 97.40% (108.81°C) and 82.80% (188.99°C) for TGA.
Feziwe B. Mamba, Bhekani S. Mbuli, James Ramontja   +2 more
wiley   +1 more source

The transmutation of dwarf galaxies : stellar populations [PDF]

, 2012
Transition-type dwarf (TTD) galaxies share characteristics of early-and late-type dwarfs. Thus, they are suspected to be the thread that connects them.
Bouchard, Antoine, De Rijcke, Sven, Koleva, Mina, Prugniel, Philippe, Vauglin, Isabelle   +4 more
core   +2 more sources

Infrared Mn i laboratory oscillator strengths for the study of late type stars and ultracool dwarfs [PDF]

Astronomy & Astrophysics, 2010
Aims. The aim of our new laboratory measurements is to measure accurate absolute oscillator strengths for neutral manganese transitions in the infrared needed for the study of late-type stars and ultracool dwarfs. Methods. Branching fractions have been measured by high resolution Fourier transform spectroscopy and combined with radiative level ...
R. Blackwell-Whitehead, Y. V. Pavlenko, G. Nave, J. C. Pickering, H. R. A. Jones, Y. Lyubchik, H. Nilsson   +6 more
openaire   +1 more source

The Future of Research in Cognitive Robotics: Foundation Models or Developmental Cognitive Models?

Advanced Robotics Research, EarlyView.
Research in cognitive robotics founded on principles of developmental psychology and enactive cognitive science would yield what we seek in autonomous robots: the ability to perceive its environment, learn from experience, anticipate the outcome of events, act to pursue goals, and adapt to changing circumstances without resorting to training with ...
David Vernon
wiley   +1 more source

X-Ray, UV, and Optical Observations of Proxima Centauri’s Stellar Cycle

The Astrophysical Journal
Proxima Cen (GJ 551; dM5.5e) is one of only about a dozen fully convective stars known to have a stellar cycle, and the only one to have long-term X-ray monitoring.
Bradford J. Wargelin, Steven H. Saar, Zackery A. Irving, Jonathan D. Slavin, Peter Ratzlaff, José-Dias do Nascimento Jr   +5 more
doaj   +1 more source

A spectral differential characterization of low-mass companions

EPJ Web of Conferences, 2013
We present a new approach with which the dynamical mass of low-mass companions around cool stars can be found. In order to discover companions to late-type stars the stellar spectrum is removed.
Lyubchik Y., Yakobchuk T., Kostogryz N., Kürster M., Kuznetsov M.   +4 more
doaj   +1 more source

The EUVE Optical Identification Campaign II: Late-Type and White Dwarf Stars

The Astronomical Journal, 1995
We present optical identifications of nine previously unidentified extreme ultraviolet (EUV) sources discovered during the Extreme Ultraviolet Explorer (EUVE) satellite surveys. The all-sky survey detected four of the sources and the more sensitive deep survey detected the other five sources.
N. Craig, A. Fruscione, J. Dupuis, M. Mathioudakis, J. J. Drake, M. Abbott, C. Christian, R. Green, T. Boroson, S. B. Howell   +9 more
openaire   +1 more source

AutomataGPT: Transformer‐Based Forecasting and Ruleset Inference for Two‐Dimensional Cellular Automata

Advanced Science, EarlyView.
We introduce AutomataGPT, a generative pretrained transformer (GPT) trained on synthetic spatiotemporal data from 2D cellular automata to learn symbolic rules. Demonstrating strong performance on both forward and inverse tasks, AutomataGPT establishes a scalable, domain‐agnostic framework for interpretable modeling, paving the way for future ...
Jaime A. Berkovich, Noah S. David, Markus J. Buehler   +2 more
wiley   +1 more source

On the Possibility of an Upper Limit on Magnetically Induced Radius Inflation in Low-mass Stars

The Astrophysical Journal
The radii of low-mass stars are observed to be inflated above standard model predictions, especially in magnetically active stars. Typically, the empirical relative radius inflations Δ R / R are ≤10% but in (rare) cases may be ≥20%.
J. MacDonald, D. J. Mullan
doaj   +1 more source

High Proper Motion Stars. III. Radial Velocities of 24 Late-Type Dwarfs

The Astronomical Journal, 1998
We report 27 radial velocity measurements for 24 stars, all with annual proper motions larger than 1''. For 17 of these, no velocities have previously been published. We identify a few stars that may be spectroscopic binaries and a sdK star of spectacularly high space velocity.
P. C. Dawson, M. M. De Robertis
openaire   +1 more source