Results 51 to 60 of about 19,704 (219)

Investigation on the Coherent Component of SHARAD Surface Echo and Surface Roughness: Scaling Behavior and Influence of Hurst Exponent

Earth and Space Science
The radar surface echo can be separated into coherent and incoherent components by statistical approaches, and the coherent component can be described by a backscattering model related to the RMS height.
Tiansheng Hong, Yan Su, Elena Pettinelli, Roberto Orosei, Sebastian Emanuel Lauro, Zhibin Li, Chunyu Ding, Elisabetta Mattei, Barbara Cosciotti, Chunlai Li   +9 more
doaj   +1 more source

A self-organized critical model and multifractal analysis for earthquakes in Central Alborz, Iran

Scientific Reports, 2022
This paper is devoted to a phenomenological study of the earthquakes in central Alborz, Iran. Using three observational quantities, namely the weight function, the quality factor, and the velocity model in this region, we develop a modified dissipative ...
M. Rahimi-Majd, T. Shirzad, M. N. Najafi
doaj   +1 more source

Can One Make Any Crash Prediction in Finance Using the Local Hurst Exponent Idea?

, 2003
We apply the Hurst exponent idea for investigation of DJIA index time-series data. The behavior of the local Hurst exponent prior to drastic changes in financial series signal is analyzed.
Ausloos, Ausloos, Baillie, Baillie, Baviera, Buldyrev, D Grech, De Lima, Ding, Fama, Granger, Ivanova, Liu, Lux, Mandelbrot, Muller, Pagan, Peng, Peng, Plerou, Stanley, Stanley, Vandewalle, Vandewalle, Z Mazur   +24 more
core   +1 more source

Integrating multivariate resting‐state fMRI features to localize epileptic networks in common childhood epilepsy

Epilepsia, EarlyView.
Abstract Objective Accurate localization of epileptic activity remains challenging when interictal discharges are absent or sparse. Although resting‐state functional MRI (rs‐fMRI) is noninvasive, individual rs‐fMRI metrics provide inconsistent and incomplete localization.
Qirui Zhang, Zixuan Zhang, Yvzhuo Li, Yan He, Fang Yang, Jacqueline Kim, Joseph I. Tracy, Guangming Lu, Zhiqiang Zhang   +8 more
wiley   +1 more source

Ascertaining Time Series Predictability in Process Control – Case Study on Rainfall Prediction

MATEC Web of Conferences, 2018
Rainfall prediction is a challenging task due to its dependency on many natural phenomenon. Some authors used Hurst exponent as a predictability indicator to ensure predictability of the time series before prediction.
Sivapragasam Chandrasekaran, Saravanan Poomalai, Balamurali Saminathan, Muttil Nitin   +3 more
doaj   +1 more source

The Importance of Considering Personal Recovery for Eating Disorders

European Eating Disorders Review, EarlyView.
ABSTRACT Objective Definitions of recovery from eating disorders (EDs) have traditionally emphasised symptom reduction and functional restoration. However, growing research highlights the importance of integrating personal recovery, defined by self‐acceptance, autonomy, and psychological wellbeing.
Andrew Allen, Maddison Tunstall, Catherine Houlihan, Kay Pozzebon, Daniel B. Fassnacht, Kathina Ali   +5 more
wiley   +1 more source

Typical Algorithms for Estimating Hurst Exponent of Time Sequence: A Data Analyst’s Perspective

IEEE Access
The Hurst exponent is a significant metric for characterizing time sequences with long-term memory property and it arises in many fields such as physics, engineering, mathematics, statistics, economics, psychology, and so on.
Hong-Yan Zhang, Zhi-Qiang Feng, Si-Yu Feng, Yu Zhou   +3 more
doaj   +1 more source

Analysis of Solar Neutrino Data from Super-Kamiokande I and II

Entropy, 2014
We are going back to the roots of the original solar neutrino problem: the analysis of data from solar neutrino experiments. The application of standard deviation analysis (SDA) and diffusion entropy analysis (DEA) to the Super-Kamiokande I and II data ...
Hans J. Haubold, Arak M. Mathai, Ram K. Saxena   +2 more
doaj   +1 more source

Nonlinear complexity analysis of brain FMRI signals in schizophrenia. [PDF]

PLoS ONE, 2014
We investigated the differences in brain fMRI signal complexity in patients with schizophrenia while performing the Cyberball social exclusion task, using measures of Sample entropy and Hurst exponent (H).
Moses O Sokunbi, Victoria B Gradin, Gordon D Waiter, George G Cameron, Trevor S Ahearn, Alison D Murray, Douglas J Steele, Roger T Staff   +7 more
doaj   +1 more source

Normal Stress Distribution of Rough Surfaces in Contact

, 2000
We study numerically the stress distribution on the interface between two thick elastic media bounded by interfaces that include spatially correlated asperities.
Alex Hansen, Barabási, Bouchaud, Bouchaud, Bouchon, Brown, Brown, Brown, Dieterich, Dmowska, Feder, Fernando A. de Oliveira, G. George Batrouni, Hansen, Jean Schmittbuhl, Landau, Lòpez, Mehrabi, Mendelsohn, Måløy, Power, Sahimi, Sayles, Schmittbuhl, Scholz, Simonsen, Stanley   +26 more
core   +2 more sources