Zobrazeno 1 - 10
of 1 707
pro vyhledávání: '"Clark, Alexander"'
Autor:
Clark, Alexander, Fijalkow, Nathanaël
Publikováno v:
Transactions of the Association for Computational Linguistics, Vol 8, Pp 409-422 (2020)
Learning probabilistic context-free grammars (PCFGs) from strings is a classic problem in computational linguistics since Horning ( 1969 ). Here we present an algorithm based on distributional learning that is a consistent estimator for a large class
Externí odkaz:
https://doaj.org/article/f645b702e3034ad29b0546213cc4b985
Our work examines $t$-structures in derived categories related to Noetherian schemes, establishing both classification and nonexistence results for compactly generated $t$-structures that satisfy a tensor compatibility condition. First, we classify w
Externí odkaz:
http://arxiv.org/abs/2404.08578
We build on the simplified spectral deferred corrections (SDC) coupling of hydrodynamics and reactions to handle the case of nuclear statistical equilibrium (NSE) and electron/positron captures/decays in the cores of massive stars. Our approach blend
Externí odkaz:
http://arxiv.org/abs/2403.14786
Autor:
Chen, Zhi, Johnson, Eric T., Katz, Max, Clark, Alexander Smith, Boyd, Brendan, Zingale, Michael
We describe the AMReX-Astrophysics framework for exploring the sensitivity of astrophysical simulations to the details of a nuclear reaction network, including the number of nuclei, choice of reaction rates, and approximations used. This is explored
Externí odkaz:
http://arxiv.org/abs/2312.02836
Publikováno v:
J. Phys.: Conf. Ser. 2742 (2024)
A proposed setting for thermonuclear (Type Ia) supernovae is a white dwarf that has gained mass from a companion to the point of carbon ignition in the core. There is a simmering phase in the early stages of burning that involves the formation and gr
Externí odkaz:
http://arxiv.org/abs/2311.07743
Autor:
Zingale, Michael, Chen, Zhi, Rasmussen, Melissa, Polin, Abigail, Katz, Max, Clark, Alexander Smith, Johnson, Eric T.
We study the coupling of hydrodynamics and reactions in simulations of the double detonation model for Type Ia supernovae. When assessing the convergence of simulations, the focus is usually on spatial resolution; however, the method of coupling the
Externí odkaz:
http://arxiv.org/abs/2309.01802
Autor:
Victor D. Thompson, Matthew Sanger, Karen Y. Smith, Carey J. Garland, Matthew D. Howland, C. Fred T. Andrus, Isabelle Holland-Lulewicz, Carla Hadden, Clark Alexander, Rachel Cajigas, Elliot Blair, Anna Semon, David Hurst Thomas
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract Shell ring archaeological sites are one of the most visible site types along the lower South Atlantic Coast of the United States. These cultural sites are large, circular to arcuate piles of mollusk shells with some reaching over three meter
Externí odkaz:
https://doaj.org/article/fe7a12ec68f64696854f493af020c764
Autor:
Clark, Alexander D.1,2 (AUTHOR) adclark@uchicago.edu, Atterholt, Jessie3 (AUTHOR), Scannella, John B.4 (AUTHOR), Carroll, Nathan5 (AUTHOR), O'Connor, Jingmai K.2 (AUTHOR)
Publikováno v:
PLoS ONE. 10/9/2024, Vol. 19 Issue 10, p1-25. 25p.
Autor:
Clark, Alexander Smith, Johnson, Eric T., Chen, Zhi, Eiden, Kiran, Willcox, Donald E., Boyd, Brendan, Cao, Lyra, DeGrendele, Christopher J., Zingale, Michael
We describe pynucastro 2.0, an open source library for interactively creating and exploring astrophysical nuclear reaction networks. We demonstrate new methods for approximating rates and using detailed balance to create reverse rates, show how to bu
Externí odkaz:
http://arxiv.org/abs/2210.09965