scholarly journals Нестационарный электрохимический отклик на прерывистую деформацию Портевена-Ле Шателье алюминий-магниевого сплава

2019 ◽  
Vol 61 (2) ◽  
pp. 296
Author(s):  
А.А. Шибков ◽  
А.А. Денисов ◽  
М.Ф. Гасанов ◽  
А.Е. Золотов ◽  
М.А. Желтов
Keyword(s):  
Electrode Potential ◽  
Deformation Curve ◽  
Deformation Bands ◽  
Self Organized ◽  
Electrochemical Response ◽  
Fractal Analyses ◽  
Self Organized Criticality ◽  
Chatelier Effect ◽  
Aluminum Magnesium Alloy

AbstractIt has been established that the Portevin–Le Chatelier effect in the AlMg6 aluminum–magnesium alloy deformed in an aqueous medium is accompanied by an intermittent electrochemical response, such as the negative jumps of the electrode potential of the sample, which occur simultaneously with the jumps of the mechanical stress on the deformation curve. Statistical and fractal analyses of the stepwise component of the electrode potential indicate the presence of long-term correlations in the structure of the electrochemical response, which are typical for the state of self-organized criticality. A possible mechanism of the appearance of jumps of the electrode potential, which is associated with the dynamics of deformation bands, is discussed.

scholarly journals Fractal analysis for the ULF data during the 1993 Guam earthquake to study prefracture criticality

2006 ◽  
Vol 13 (4) ◽  
pp. 409-412 ◽  
Author(s):  
Y. Ida ◽  
M. Hayakawa
Keyword(s):  
Fractal Analysis ◽  
Main Shock ◽  
Epicentral Distance ◽  
Sense Of Self ◽  
Low Frequency ◽  
Large Earthquake ◽  
Self Organized ◽  
Self Organized Criticality ◽  
Electromagnetic Signature

Abstract. An extremely large earthquake (with magnitude of 8.2) happened on 8 August 1993 near the Guam island, and ultra-low-frequency (ULF) (frequency less than 1 Hz) electromagnetic fields were measured by 3-axis induction magnetometers at an observing station (with the epicentral distance of 65 km) with sampling frequency of 1 Hz. In order to study electromagnetic signature of prefracture criticality, we have undertaken the fractal (mono-fractal) analysis by means of the Higuchi's method for the ULF data during the 1993 Guam earthquake. Then, it is found that the fractal dimension exhibits five maxima 99, 75, 52, 21, and 9–4 days before the earthquake main shock, which suggests the ULF electromagnetic signature of nonlinear evolution (in the sense of self-organized criticality) taking place in the lithosphere just before the 1993 large Guam earthquake. That is, there take place step-like changes in the lithosphere during the long-term of the order of several months before the main shock.

Energetics as Self-Organized System: Methodological Aspects

2002 ◽  
Vol 7 (2) ◽  
pp. 123-137
Author(s):  
R. Šiugždaitė ◽  
S. Norvaišas
Keyword(s):  
Urban System ◽  
Real Data ◽  
System Modelling ◽  
Decision Support Tools ◽  
Self Organized ◽  
Support Tools ◽  
Self Organized Criticality ◽  
Methodological Aspects ◽  
Best Fit

In the article we propose new decision support tools for region energetics development. The method is based on analysing complex system’s state and comparing it with the self-organized criticality (SOC) class that characterize the long-term system’s stability. We start with urban system modelling using cellular automata (CA) with the best fit to real data and then we raise hypothesis about adequacy of urban and energetics system elements distribution. The urban data analysis shows that it is in SOC state for wide rank of countries. We calculate required parameters for energetics system, which are used in decision making for the system long-term development.

scholarly journals Landslides, sandpiles, and self-organized criticality

2003 ◽  
Vol 3 (6) ◽  
pp. 505-514 ◽  
Author(s):  
S. Hergarten
Keyword(s):  
Time Dependent ◽  
Mass Movements ◽  
Size Distributions ◽  
Triggering Mechanism ◽  
Self Organized ◽  
Long Time ◽  
Self Organized Criticality ◽  
Relationship Of ◽  
Power Law Distributions

Abstract. Power-law distributions of landslides and rockfalls observed under various conditions suggest a relationship of mass movements to self-organized criticality (SOC). The exponents of the distributions show a considerable variability, but neither a unique correlation to the geological or climatic situation nor to the triggering mechanism has been found. Comparing the observed size distributions with models of SOC may help to understand the origin of the variation in the exponent and finally help to distinguish the governing components in long-term landslide dynamics. However, the three most widespread SOC models either overestimate the number of large events drastically or cannot be consistently related to the physics of mass movements. Introducing the process of time-dependent weakening on a long time scale brings the results closer to the observed statistics, so that time-dependent weakening may play a major part in the long-term dynamics of mass movements.

scholarly journals Self-Organized Criticality of Rainfall in Central China

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Zhiliang Wang ◽  
Chunyan Huang
Keyword(s):  
Central China ◽  
Scale Invariant ◽  
Drought Duration ◽  
Climate Zones ◽  
Self Organized ◽  
Self Organized Criticality ◽  
Rain Events ◽  
Term Rain ◽  
Dynamics Process

Rainfall is a complexity dynamics process. In this paper, our objective is to find the evidence of self-organized criticality (SOC) for rain datasets in China by employing the theory and method of SOC. For this reason, we analyzed the long-term rain records of five meteorological stations in Henan, a central province of China. Three concepts, that is, rain duration, drought duration, accumulated rain amount, are proposed to characterize these rain events processes. We investigate their dynamics property by using scale invariant and found that the long-term rain processes in central China indeed exhibit the feature of self-organized criticality. The proposed theory and method may be suitable to analyze other datasets from different climate zones in China.

scholarly journals Long-term seismogenesis and self-organized criticality

2004 ◽  
Vol 56 (8) ◽  
pp. 749-760 ◽  
Author(s):  
Frank Evison ◽  
David Rhoades
Keyword(s):  
Self Organized ◽  
Self Organized Criticality

scholarly journals Emergence of Lagrangian Field Theory from Self-Organized Criticality

2020 ◽  
Author(s):  
Ervin Goldfain
Keyword(s):  
Field Theory ◽  
Critical Behavior ◽  
Large Scale ◽  
Complex Dynamics ◽  
Large Scale Systems ◽  
Self Organized ◽  
Lagrangian Field Theory ◽  
Self Organized Criticality ◽  
Universal Mechanism

Self-organized criticality (SOC) is a universal mechanism for self-sustained critical behavior in large-scale systems evolving outside equilibrium. Our report explores a tentative link between SOC and Lagrangian field theory, with the long-term goal of bridging the gap between complex dynamics and the non-perturbative behavior of quantum fields.

Possible self-organized criticality in the Portevin–Le Chatelier effect during decomposition of solid solution alloys

2011 ◽  
Vol 2 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Nguyen Q. Chinh ◽  
Tivadar Győri ◽  
Jenő Gubicza ◽  
János Lendvai ◽  
Terence G. Langdon
Keyword(s):  
Solid Solution ◽  
Self Organized ◽  
Decomposition Of Solid Solution ◽  
Self Organized Criticality ◽  
Chatelier Effect ◽  
Image Position

Abstract

Problem behavior in autism spectrum disorders: A paradigmatic self-organized perspective of network structures

2019 ◽  
Vol 42 ◽  
Author(s):  
Lucio Tonello ◽  
Luca Giacobbi ◽  
Alberto Pettenon ◽  
Alessandro Scuotto ◽  
Massimo Cocchi ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Problem Behaviors ◽  
Autism Spectrum ◽  
The Self ◽  
Network Structures ◽  
Self Organized ◽  
Critical Equilibrium ◽  
Self Organized Criticality ◽  
Acute Agitation ◽  
Spectrum Disorders

AbstractAutism spectrum disorder (ASD) subjects can present temporary behaviors of acute agitation and aggressiveness, named problem behaviors. They have been shown to be consistent with the self-organized criticality (SOC), a model wherein occasionally occurring “catastrophic events” are necessary in order to maintain a self-organized “critical equilibrium.” The SOC can represent the psychopathology network structures and additionally suggests that they can be considered as self-organized systems.

Self-Organized Criticality in the Autowave Model of Speciation

2020 ◽  
Vol 75 (5) ◽  
pp. 398-408
Author(s):  
A. Y. Garaeva ◽  
A. E. Sidorova ◽  
N. T. Levashova ◽  
V. A. Tverdislov
Keyword(s):  
Self Organized ◽  
Self Organized Criticality
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