Results 1 to 10 of about 1,231,611 (370)

Sub-second periodicity in a fast radio burst [PDF]

Nature, 2021
Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light years1. The nature of their progenitors and their emission mechanism remain open astrophysical questions2.
B. Andersen, K. Bandura, M. Bhardwaj, P. Boyle, C. Brar, D. Breitman, T. Cassanelli, S. Chatterjee, P. Chawla, J. Cliche, D. Cubranic, A. Curtin, M. Deng, M. Dobbs, F. Dong, E. Fonseca, B. Gaensler, U. Giri, D. Good, A. Hill, A. Josephy, J. Kaczmarek, Zarif Kader, Joseph W. Kania, V. Kaspi, C. Leung, D. Li, Hsiu-Hsien Lin, K. Masui, R. Mckinven, J. Mena-Parra, M. Merryfield, B. W. Meyers, D. Michilli, A. Naidu, L. Newburgh, C. Ng, A. Ordog, C. Patel, A. Pearlman, U. Pen, E. Petroff, Z. Pleunis, M. Rafiei-Ravandi, Mubdi Rahman, S. Ransom, A. Renard, Pranav Sanghavi, P. Scholz, J. Shaw, K. Shin, S. Siegel, Saurabh Singh, Kendrick M. Smith, I. Stairs, C. M. Tan, S. Tendulkar, K. Vanderlinde, D. Wiebe, D. Wulf, A. Zwaniga, D. Michilli   +61 more
semanticscholar   +1 more source

Repeating behaviour of FRB 121102: periodicity, waiting times, and energy distribution [PDF]

Monthly notices of the Royal Astronomical Society, 2020
Detections from the repeating fast radio burst FRB 121102 are clustered in time, noticeable even in the earliest repeat bursts. Recently, it was argued that the source activity is periodic, suggesting that the clustering reflected a not-yet-identified ...
M. Cruces, L. Spitler, P. Scholz, R. Lynch, A. Seymour, J. Hessels, J. Hessels, C. Gouiffès, G. H. Hilmarsson, M. Kramer, S. Munjal   +10 more
semanticscholar   +1 more source

Understanding Periodic and Non-periodic Chemistry in Periodic Tables [PDF]

Frontiers in Chemistry, 2021
The chemical elements are the “conserved principles” or “kernels” of chemistry that are retained when substances are altered. Comprehensive overviews of the chemistry of the elements and their compounds are needed in chemical science. To this end, a graphical display of the chemical properties of the elements, in the form of a Periodic Table, is the ...
Changsu Cao, René E. Vernon, W. H. Eugen Schwarz, W. H. Eugen Schwarz, Jun Li, Jun Li   +5 more
openaire   +3 more sources

Periodic Behaviors [PDF]

SIAM Journal on Control and Optimization, 2010
This paper studies behaviors that are defined on a torus, or equivalently, behaviors defined in spaces of periodic functions, and establishes their basic properties analogous to classical results of Malgrange, Palamodov, Oberst et al. for behaviors on R^n. These properties - in particular the Nullstellensatz describing the Willems closure - are closely
Napp, Diego, Put, Marius van der, Shankar, Shiva   +2 more
openaire   +2 more sources

Seasonality of COVID-19 incidence in the United States

Frontiers in Public Health, 2023
BackgroundThe surges of Coronavirus Disease 2019 (COVID-19) appeared to follow a repeating pattern of COVID-19 outbreaks regardless of social distancing, mask mandates, and vaccination campaigns.ObjectivesThis study aimed to investigate the seasonality ...
El Hussain Shamsa, El Hussain Shamsa, Ali Shamsa, Kezhong Zhang, Kezhong Zhang   +4 more
doaj   +1 more source

RiboNT: A Noise-Tolerant Predictor of Open Reading Frames from Ribosome-Protected Footprints

Life, 2021
Ribo-seq, also known as ribosome profiling, refers to the sequencing of ribosome-protected mRNA fragments (RPFs). This technique has greatly advanced our understanding of translation and facilitated the identification of novel open reading frames (ORFs ...
Bo Song, Mengyun Jiang, Lei Gao
doaj   +1 more source

Fast Radio Burst 121102 Pulse Detection and Periodicity: A Machine Learning Approach [PDF]

Astrophysical Journal, 2018
We report the detection of 72 new pulses from the repeating fast radio burst FRB 121102 in Breakthrough Listen C-band (4–8 GHz) observations at the Green Bank Telescope.
Y. Zhang, V. Gajjar, G. Foster, A. Siemion, J. Cordes, C. Law, Y. Wang   +6 more
semanticscholar   +1 more source

RobustPeriod: Robust Time-Frequency Mining for Multiple Periodicity Detection

SIGMOD Conference, 2020
Periodicity detection is a crucial step in time series tasks, including monitoring and forecasting of metrics in many areas, such as IoT applications and self-driving database management system. In many of these applications, multiple periodic components
Qingsong Wen, Kai He, Liang Sun, Yingying Zhang, Min Ke, Huan-min Xu   +5 more
semanticscholar   +1 more source

Low-Noise Synthetic Turbulence Tailored to Lateral Periodic Boundary Conditions

Fluids, 2021
The present work is dedicated to turbulence synthesis tailored to lateral periodic boundary conditions for direct noise computations through compressible large eddy simulations.
Tommy Rigall, Benjamin Cotté, Philippe Lafon   +2 more
doaj   +1 more source

(Quasi)Periodicity Quantification in Video Data, Using Topology [PDF]

SIAM Journal of Imaging Sciences, 2017
This work introduces a novel framework for quantifying the presence and strength of recurrent dynamics in video data. Specifically, we provide continuous measures of periodicity (perfect repetition) and quasiperiodicity (superposition of periodic modes ...
C. Tralie, Jose A. Perea
semanticscholar   +1 more source