Results 91 to 100 of about 19,552 (217)

Deep Neural Network Model for Hurst Exponent: Learning from R/S Analysis

open access: yesMathematics
This paper proposes a deep neural network (DNN) model to estimate the Hurst exponent, a crucial parameter in modelling stock market price movements driven by fractional geometric Brownian motion.
Luca Di Persio, Tamirat Temesgen Dufera
doaj   +1 more source

Ratios of Extinction Coefficient, Mass, and Surface Area to Backscatter Coefficient and Mass to Extinction Coefficient Derived From Balloon‐Borne Stratospheric Aerosol Size Distribution Measurements From 1989–2025

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract In situ measurements of stratospheric aerosol are the only measurements that provide sufficient detail to determine aerosol number, size, surface area, volume/mass, and effective radius; however, these measurements are limited in space and time.
Terry Deshler, Lars E. Kalnajs
wiley   +1 more source

Fractional Black–Scholes option pricing, volatility calibration and implied Hurst exponents in South African context

open access: yesSouth African Journal of Economic and Management Sciences, 2017
Background: Contingent claims on underlying assets are typically priced under a framework that assumes, inter alia, that the log returns of the underlying asset are normally distributed.
Emlyn Flint, Eben Maré
doaj   +1 more source

Liquid Phase TEM of Diffusing Emulsion Droplets

open access: yesSmall, Volume 22, Issue 13, 3 March 2026.
Motion of emulsion droplets was observed via in situ liquid phase transmission electron microscopy. Analysis revealed that the motion is self‐affine and influenced by multiple stochastic processes, as well as a fractal landscape created by the electron beam.
Maria A. Vratsanos   +4 more
wiley   +1 more source

Use of EIS and Electrochemical Noise Fractal Analysis to StudySalvia hispanica as Green Corrosion Inhibitor for Carbon Steel

open access: yesInternational Journal of Electrochemical Science, 2016
A study on the use of Salvia hispanica (Chia) as green corrosion inhibitor for 1018 carbon steel in 0.5 M H2SO4 has been carried out by using electrochemical impedance (EIS) and electrochemical noise measurements (EN). Parameters such as polarization and
I.A. Hermoso-Diaz   +2 more
doaj   +1 more source

Edge‐Oriented DoS/DDoS Intrusion Detection and Supervision Platform

open access: yesSECURITY AND PRIVACY, Volume 9, Issue 2, March/April 2026.
ABSTRACT This work presents an Edge Node‐Oriented DoS/DDoS Intrusion Detection and Monitoring Platform, a novel anomaly detection system based on temporal analysis with machine learning (ML) and deep learning (DL) algorithms, specifically designed to operate on edge servers with limited resources.
Geraldo Eufrazio Martins Júnior   +3 more
wiley   +1 more source

Snow metamorphism: a fractal approach

open access: yes, 2010
Snow is a porous disordered medium consisting of air and three water phases: ice, vapour and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton.
A. D. Frolov   +7 more
core   +1 more source

Integrating GNSS and Hydrological Data to Understand Seasonal Microseismicity at La Soufrière de Guadeloupe

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract La Soufrière de Guadeloupe volcano exhibits microseismic activity dominated by volcano‐tectonic repeaters, mainly occurring in swarms clustered in a sub‐vertical conduit beneath the Tarissan acid lake (TAS) at depths less than 800 m. Following the April 2018 earthquake (Mlv 4.1), which likely damaged the dome, swarms intensified and show ...
Laëtitia Pantobe   +4 more
wiley   +1 more source

Realization of SOC behavior in a dc glow discharge plasma

open access: yes, 2006
Experimental observations consistent with Self Organized Criticality (SOC) have been obtained in the electrostatic floating potential fluctuations of a dc glow discharge plasma. Power spectrum exhibits a power law which is compatible with the requirement
A.N. Sekar Iyengar   +22 more
core   +1 more source

Fault Roughness Controls Seismicity Front Migration During Fluid Injection

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract The increasing occurrence of injection‐induced earthquakes has raised public concern and highlighted the importance of understanding subsurface processes and mechanisms to assess induced seismic hazards and risks. We develop a simple physics‐based model to investigate how fault roughness controls the migration of seismicity during fluid ...
Hsiao‐Fan Lin   +2 more
wiley   +1 more source

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