Results 1 to 10 of about 889,852 (360)

Increased Winter‐Mean Wave Height, Variability, and Periodicity in the Northeast Atlantic Over 1949–2017

Geophysical Research Letters, 2018
Gerd Masselink, Bruno Castelle, Guillaume Dodet   +2 more
exaly   +2 more sources

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

Changes in Flood Regime of the Upper Yangtze River

Frontiers in Earth Science, 2021
River flooding affects more people worldwide than other natural hazards. Thus, analysis of the changes in flood regime caused by global warming and increasing anthropogenic activities will help us make adaptive plans for future flood management.
Yu Zhang, Guohua Fang, Zhengyang Tang, Zhengyang Tang, Xin Wen, Hairong Zhang, Hairong Zhang, Ziyu Ding, Xin Li, Xinsheng Bian, Zengyun Hu   +10 more
doaj   +1 more source

A new approach to persistence and periodicity of logistic systems with jumps

AIMS Mathematics, 2021
This paper considers a class of logistic type differential system with jumps. Based on discontinuous control theory, a new approach is developed to guarantee the persistence and existence of a unique globally attractive positive periodic solution.
Kegang Zhao
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

(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

A Primer for Microbiome Time-Series Analysis

Frontiers in Genetics, 2020
Time-series can provide critical insights into the structure and function of microbial communities. The analysis of temporal data warrants statistical considerations, distinct from comparative microbiome studies, to address ecological questions.
Ashley R. Coenen, Sarah K. Hu, Elaine Luo, Daniel Muratore, Joshua S. Weitz, Joshua S. Weitz   +5 more
doaj   +1 more source

Quasi-Periodic Crystals—The Long Road from Discovery to Acceptance

Rambam Maimonides Medical Journal, 2013
[Extract] Three surprising discoveries on the nature of matter and its properties were published in the mid-1980s. All these discoveries led to Nobel prizes. The first discovery was in 1985, when fullerenes were discovered by Robert F.
Daniel Schechtman
doaj   +1 more source