Results 21 to 30 of about 284,852 (62)

Different styles of subglacial soft bed hydrology: Examples from Breiðamerkurjökull and Fjallsjökull, Iceland

Earth Surface Processes and Landforms, Volume 50, Issue 2, February 2025.
We use an innovative Smart tracker combined with remotely sensed velocity data to compare the velocity of two adjacent soft‐bedded Icelandic glaciers. They have distinct subglacial hydrologies due to differences in meltwater flux, subglacial transmissivity and the presence of a deep proglacial lagoon.
Jane K. Hart, Kirk Martinez, Nathaniel Baurley, Benjamin A. Robson, Amelia Andrews   +4 more
wiley   +1 more source

Effects of high‐intensity interval training on sleep disturbances associated with posttraumatic stress disorder

Journal of Sleep Research, Volume 34, Issue 1, February 2025.
Summary Sleep disturbances are common in individuals with posttraumatic stress disorder. Exercise interventions are a promising approach in the treatment of sleep disorders, but little is known about the efficacy of exercise interventions for sleep disturbances associated with posttraumatic stress disorder.
Anima Pieper, Felix Bermpohl, Kristina Meyer, Rouven Bathe‐Peters, Viola Trobisch, Antonia Schulte, Maximilian Grummt, Bernd Wolfarth, Andreas Ströhle, Nikola Schoofs, Kathlen Priebe   +10 more
wiley   +1 more source

Antarctic Wide Subglacial Hydrology Modeling

Geophysical Research Letters, Volume 52, Issue 1, 16 January 2025.
Abstract Global sea levels are rising due, in large part, to the increase in the rate of melting of ice sheets as a direct result of climate change. A large fraction of uncertainty in future sea level rise comes from limited understanding of basal conditions under ice sheets.
Shivani Ehrenfeucht, Christine Dow, Koi McArthur, Mathieu Morlighem, Felicity S. McCormack   +4 more
wiley   +1 more source

Predicting the Onset of Subglacial Drainage Channels

Journal of Geophysical Research: Earth Surface, Volume 129, Issue 12, December 2024.
Abstract The sliding speed of glaciers depends strongly on the water pressure at the ice‐sediment interface, which is controlled by the efficiency of water transport through a subglacial hydrological system. The least efficient component of the system consists of “distributed” flow everywhere beneath the ice, whereas the “channelized” drainage through ...
K. L. P. Warburton, C. R. Meyer, A. N. Sommers   +2 more
wiley   +1 more source

Association of Objectively Measured Sedentary Behavior With Arterial Stiffness: Findings From the Nijmegen Exercise Study

Scandinavian Journal of Medicine &Science in Sports, Volume 34, Issue 11, November 2024.
ABSTRACT Sedentary behavior (SB) may affect arterial stiffness, preceding the development of cardiovascular disease. We investigated the association of objectively measured SB with arterial stiffness. We also investigated factors that affected this association.
Koen M. van der Sluijs, Esmée A. Bakker, Thijs P. Kerstens, Niels A. Stens, Iris A. de Koning, Jos Thannhauser, Afrah E. F. Malik, Koen D. Reesink, P. M. Nabeel, Kiran V. Raj, Jayaraj Joseph, Nijmegen Exercise Study collaboration, Neeltje A.E. Allard, Kristian Berge, Coen C.W.G. Bongers, Calvin G. Brouwer, Yvonne A.W. Hartman, Lotte R. Hazeleger, Maria T.E. Hopman, Sylvan L.J.E. Janssen, Jules M. Janssen Daalen, Bregina T.P. Kersten, Lotte Koopmans, Sophie H. Kroesen, Thijs R.J. Landman, Tom T.J. Luiken, Isa H. Mast, Mandy A.G. Peggen, Merle C.A. Schoofs, Bibi A. Schreurs, Jenske J.M. Vermeulen, Janneke I.A. Vloet, Lisa Wanders, Thijs M. H. Eijsvogels, Dick H. J. Thijssen   +34 more
wiley   +1 more source

Computing Arakelov class groups [PDF]

arXiv, 2008
Shanks's infrastructure algorithm and Buchmann's algorithm for computing class groups and unit groups of rings of integers of algebraic number fields are most naturally viewed as computations inside Arakelov class groups. In this paper we discuss the basic properties of Arakelov class groups and of the set of reduced Arakelov divisors.
arxiv  

Exploring Topography Downscaling Methods for Hyper‐Resolution Land Surface Modeling

Journal of Geophysical Research: Atmospheres, Volume 129, Issue 20, 28 October 2024.
Abstract Hyper‐resolution land surface modeling provides an unprecedented opportunity to simulate locally relevant water and energy cycles. However, the available meteorological forcing data is often insufficient to fulfill the requirements of hyper‐resolution modeling.
Sisi Chen, Lu Li, Zhongwang Wei, Nan Wei, Yonggen Zhang, Shupeng Zhang, Hua Yuan, Wei Shangguan, Shulei Zhang, Qingliang Li, Yongjiu Dai   +10 more
wiley   +1 more source

Counting points on curves over families in polynomial time [PDF]

arXiv, 2005
This note concerns the theoretical algorithmic problem of counting rational points on curves over finite fields. It explicates how the algorithmic scheme introduced by Schoof and generalized by the author yields an algorithm whose running time is uniformly polynomial time for curves in families.
arxiv  

Counting points on abelian surfaces over finite fields with Elkies's method [PDF]

arXiv, 2022
We generalize Elkies's method, an essential ingredient in the SEA algorithm to count points on elliptic curves over finite fields of large characteristic, to the setting of p.p. abelian surfaces. Under reasonable assumptions related to the distribution of Elkies primes, we obtain improvements over Schoof's method in two cases.
arxiv  

Four primality testing algorithms [PDF]

arXiv, 2008
In this expository paper we describe four primality tests. The first test is very efficient, but is only capable of proving that a given number is either composite or 'very probably' prime. The second test is a deterministic polynomial time algorithm to prove that a given numer is either prime or composite.
arxiv