Results 11 to 20 of about 113,373 (284)
Revisiting the statistical isotropy of GRB sky distribution [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The assumption of homogeneity and isotropy on large scales is one of the main hypotheses of the standard cosmology. In this paper, we test the hypothesis of isotropy from the two-point angular correlation function of 2626 gamma-ray bursts (GRB) of the ...
Alcaniz, Jailson S. +3 more
core +2 more sources
A robust measure of event isotropy at colliders [PDF]
Journal of High Energy Physics, 2020 We introduce a new event shape observable — event isotropy — that quantifies how close the radiation pattern of a collider event is to a uniform distribution.
Cari Cesarotti, Jesse Thaler
doaj +2 more sources
Update on Testing the Isotropy of the Properties of Gamma-Ray Bursts [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Previously we proposed a novel method to inspect the isotropy of the properties of gamma-ray bursts (GRBs) such as their duration, fluences and peak fluxes at various energy bands and different time scales, complementary to existing studies of spatial ...
Shafieloo, Arman, Řípa, Jakub
core +4 more sources
Non-isotropy Regularization for Proxy-based Deep Metric Learning [PDF]
Computer Vision and Pattern Recognition, 2022 Deep Metric Learning (DML) aims to learn representation spaces on which semantic relations can simply be expressed through predefined distance metrics. Best performing approaches commonly leverage class proxies as sample stand-ins for better convergence ...
Karsten Roth, O. Vinyals, Zeynep Akata
semanticscholar +1 more source
Emergence of Isotropy and Dynamic Scaling in 2D Wave Turbulence in a Homogeneous Bose Gas. [PDF]
Physical Review Letters, 2022 We realize a turbulent cascade of wave excitations in a homogeneous 2D Bose gas and probe on all relevant time and length scales how it builds up from small to large momenta, until the system reaches a steady state with matching energy injection and ...
M. Gałka +6 more
semanticscholar +1 more source
A Cluster-based Approach for Improving Isotropy in Contextual Embedding Space [PDF]
Annual Meeting of the Association for Computational Linguistics, 2021 The representation degeneration problem in Contextual Word Representations (CWRs) hurts the expressiveness of the embedding space by forming an anisotropic cone where even unrelated words have excessively positive correlations.
S. Rajaee, Mohammad Taher Pilehvar
semanticscholar +1 more source
An Isotropy Analysis in the Multilingual BERT Embedding Space [PDF]
Findings, 2021 Several studies have explored various advantages of multilingual pre-trained models (such as multilingual BERT) in capturing shared linguistic knowledge. However, less attention has been paid to their limitations.
S. Rajaee, Mohammad Taher Pilehvar
semanticscholar +1 more source
How Does Fine-tuning Affect the Geometry of Embedding Space: A Case Study on Isotropy [PDF]
Conference on Empirical Methods in Natural Language Processing, 2021 It is widely accepted that fine-tuning pre-trained language models usually brings about performance improvements in downstream tasks. However, there are limited studies on the reasons behind this effectiveness, particularly from the viewpoint of ...
S. Rajaee, Mohammad Taher Pilehvar
semanticscholar +1 more source
Probing cosmic isotropy with a new X-ray galaxy cluster sample through the LX–T scaling relation [PDF]
Astronomy & Astrophysics, 2020 The isotropy of the late Universe and consequently of the X-ray galaxy cluster scaling relations is an assumption greatly used in astronomy. However, within the last decade, many studies have reported deviations from isotropy when using various ...
K. Migkas +5 more
semanticscholar +1 more source
Nature Nanotechnology, 2021 Expansion microscopy (ExM) physically magnifies biological specimens to enable nanoscale-resolution imaging using conventional microscopes. Current ExM methods permeate specimens with free-radical-chain-growth-polymerized polyacrylate hydrogels, whose ...
Ruixuan Gao +7 more
semanticscholar +1 more source