T-@npi: A twitter-based safety confirmation system

Utsu, Keisuke; Manaka, Ayami; Abe, Rie; Akio, Ogata; Yamamoto, Yoshiro; Ishii, Hiroshi; Uchida, Osamu

doi:10.1109/tencon.2016.7848427

Cited by 8 publications

(7 citation statements)

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“…(1) holds both regionally and globally). It is also well known that EQs are clustered in time and the Omori (power) law describes the temporal decay of aftershock activity 19 (see also Ref. 17):…”

mentioning

confidence: 99%

Minima of the fluctuations of the order parameter of global seismicity

Sarlis

Christopoulos

Skordas

2015

Chaos: An Interdisciplinary Journal of Nonlinear Science

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Minima of the fluctuations of the order parameter of global seismicity. Chaos, volume 25 (Article number 063110) and may be found at http://dx.doi.org/10.1063/1.4922300 . Copyright © and MoralRights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. Furthermore, the present results strengthen the view that the solid Earth crust behaves as a single complex system. CURVE is the Institutional Repository for Coventry University

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confidence: 99%

Minima of the fluctuations of the order parameter of global seismicity

Sarlis

Christopoulos

Skordas

2015

Chaos: An Interdisciplinary Journal of Nonlinear Science

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“…Long back in 1895, Fusakichi Omori of the Tokyo University suggested that the rate of the aftershock counts decreases inversely with time elapsed since the main shock at any epicentre [44]. Utsu later modified that law saying that the rate of aftershocks decrease inversely with a power of the time plus an adjustable constant and the power is close to unity [45] and varies in the range 0.7-1.5. Beno Gutenberg and Charles Francis Richter, both from Caltech, in 1956 proposed a law saying that the logarithm of the number of earthquakes of a particular magnitude or more, occurring in a given region and time period decreases linearly with that particular magnitude.…”

Section: Statistical Physics Of Earthquakes: Omori and Gutenberg-rimentioning

confidence: 99%

Story of the Developments in Statistical Physics of Fracture, Breakdown and Earthquake: A Personal Account

Chakrabarti

2017

Rep. Adv. Phys. Sci.

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We review the developments of the statistical physics of fracture and earthquake over the last four decades. We argue that major progress has been made in this¯eld and that the key concepts should now become integral part of the (under-) graduate level text books in condensed matter physics. For arguing in favor of this, we compare the development (citations) with the same for some other related topics in condensed matter, for which Nobel prizes have already been awarded.

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“…The distribution of calm time has been found to be power law in many AE measurements (e.g., tensile failure experiment of paper sheets [16] and volcanic rocks at Stromboli [17]). For the eventoccurrence density, the power-law decay of aftershock activity is known as Omori-Utsu (OU) law in seismology [18,19]. OU-like behavior is also observed in various AE measurements (e.g., microfracturing in a compressed rock [20,21]).…”

Section: Introductionmentioning

confidence: 99%

Temporal analysis of acoustic emission from a plunged granular bed

Tsuji

Katsuragi

2015

Phys. Rev. E

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The statistical property of acoustic emission (AE) events from a plunged granular bed is analyzed by means of actual time and natural time analyses. These temporal analysis methods allow us to investigate the details of AE events that follow a power-law distribution. In the actual time analysis, the calm time distribution and the decay of the event-occurrence density after the largest event (i.e., Omori-Utsu law) are measured. Although the former always shows a power-law form, the latter does not always obey a power law. Markovianity of the event-occurrence process is also verified using a scaling law by assuming that both of them exhibit power laws. We find that the effective shear strain rate is a key parameter to classify the emergence rate of power-law nature and Markovianity in the granular AE events. For the natural time analysis, the existence of self organized critical (SOC) states is revealed by calculating the variance of natural time χ k , where kth natural time of N events is defined as χ k = k/N . In addition, the energy difference distribution can be fitted by a q-Gaussian form, which is also consistent with the criticality of the system.

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T-@npi: A twitter-based safety confirmation system

Cited by 8 publications

References 0 publications

Minima of the fluctuations of the order parameter of global seismicity

Minima of the fluctuations of the order parameter of global seismicity

Story of the Developments in Statistical Physics of Fracture, Breakdown and Earthquake: A Personal Account

Temporal analysis of acoustic emission from a plunged granular bed

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