Results 31 to 40 of about 284,852 (62)

The Counting function for Elkies primes [PDF]

arXiv, 2023
Let $E$ be an elliptic curve over a finite field $\mathbb{F}_q$ where $q$ is a prime power. The Schoof--Elkies--Atkin (SEA) algorithm is a standard method for counting the number of $\mathbb{F}_q$-points on $E$. The asymptotic complexity of the SEA algorithm depends on the distribution of the so-called Elkies primes.
arxiv  

The 3D Crustal Structure of the Wilkes Subglacial Basin, East Antarctica, Using Variation of Information Joint Inversion of Gravity and Magnetic Data

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 10, October 2024.
Abstract Direct geological information in Antarctica is limited to ice free regions along the coast, high mountain ranges, or isolated nunataks. Therefore, indirect methods are required to reveal subglacial geology and heterogeneities in crustal properties, which are critical steps toward interpreting geological history.
Maximilian Lowe, Tom Jordan, Max Moorkamp, Jörg Ebbing, Chris Green, Mareen Lösing, Teal Riley, Robert Larter   +7 more
wiley   +1 more source

Glacier Surges Controlled by the Close Interplay Between Subglacial Friction and Drainage

Journal of Geophysical Research: Earth Surface, Volume 129, Issue 10, October 2024.
Abstract The flow of glaciers and ice sheets is largely influenced by friction at the ice‐bed interface that can trigger rapid changes in glacier motion ranging from seasonal velocity variations to cyclic surge instabilities or even devastating glacier collapse.
Kjetil Thøgersen, Adrien Gilbert, Coline Bouchayer, Thomas Vikhamar Schuler   +3 more
wiley   +1 more source

Influence of the Phase Fractions on the Formation of Eutectic Colonies: A Large‐Scale Phase‐Field Study

Advanced Engineering Materials, Volume 26, Issue 17, September 2024.
The influence of different melt composition and hence of the adjusting phase fractions on the growth of eutectic colonies is investigated in two‐ and three‐dimensional (3D) large‐scale simulations with up to 3 × 109 cells for a specially designed model systems N‐xA‐yC, which is generated on the basis of the high performance material NiAl‐34Cr.
Michael Kellner, Henrik Hierl, Britta Nestler   +2 more
wiley   +1 more source

Using zeta functions to factor polynomials over finite fields [PDF]

arXiv, 2017
In 2005, Kayal suggested that Schoof's algorithm for counting points on elliptic curves over finite fields might yield an approach to factor polynomials over finite fields in deterministic polynomial time. We present an exposition of his idea and then explain details of a generalization involving Pila's algorithm for abelian varieties.
arxiv  

A 3.3‐Million‐Year Record of Antarctic Iceberg Rafted Debris and Ice Sheet Evolution Quantified by Machine Learning

Paleoceanography and Paleoclimatology, Volume 39, Issue 9, September 2024.
Abstract Over the last 3.3 million years, the Antarctic Ice Sheet (AIS) has undergone phases of ice sheet growth and decay, impacting sea level and climate globally. Presently, the largely marine‐terminating AIS loses mass primarily by iceberg calving and basal melt of ice shelves. Quantifying past rates and timing of AIS melt is vital to understanding
Claire E. Jasper, Blake Dyer, Brendan T. Reilly, Trevor Williams, Sidney Hemming, Maureen E. Raymo   +5 more
wiley   +1 more source

Future Climate Projections for South Florida: Improving the Accuracy of Air Temperature and Precipitation Extremes With a Hybrid Statistical Bias Correction Technique

Earth's Future, Volume 12, Issue 8, August 2024.
Abstract Projecting future climate variables is essential for comprehending the potential impacts on hydroclimatic hazards like floods and droughts. Evaluating these impacts is challenging due to the coarse spatial resolution of global climate models (GCMs); therefore, bias correction is widely used.
Leila Rahimi, Mushfiqul Hoque, Ebrahim Ahmadisharaf, Nasrin Alamdari, Vasubandhu Misra, Ana Carolina Maran, Shih‐Chieh Kao, Amir AghaKouchak, Rocky Talchabhadel   +8 more
wiley   +1 more source

Isogenies for point counting on genus two hyperelliptic curves with maximal real multiplication [PDF]

arXiv, 2017
Schoof's classic algorithm allows point-counting for elliptic curves over finite fields in polynomial time. This algorithm was subsequently improved by Atkin, using factorizations of modular polynomials, and by Elkies, using a theory of explicit isogenies.
arxiv  

Salmonella‐driven intestinal edema in mice is characterized by tensed fibronectin fibers

The FEBS Journal, Volume 291, Issue 14, Page 3104-3127, July 2024.
Salmonella‐induced intestinal inflammation elicits diverse tissue morphology alterations, notably submucosal edema formation through fluid accumulation in the interstitial space. Our study underscores the significance of extracellular matrix components in preserving tissue integrity during acute inflammation.
Ronja Rappold, Konstantinos Kalogeropoulos, Ulrich auf dem Keller, Viola Vogel, Emma Slack   +4 more
wiley   +1 more source

Acute psychosocial stress modulates neural and behavioral substrates of cognitive control

Human Brain Mapping, Volume 45, Issue 8, June 1, 2024.
We showed enhancements in performance on a cognitive control task following exposure to an acute psychosocial stressor. Additionally, using multivariate pattern analysis of fMRI data, we showed stress‐related differences in activation patterns within regions associated with visuomotor coordination—a skill central to successful cognitive control ...
Chrystal Spencer, Ravi D. Mill, Jamil P. Bhanji, Mauricio R. Delgado, Michael W. Cole, Elizabeth Tricomi   +5 more
wiley   +1 more source