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Two types of avalanche behaviour in model granular media

Barker, G.C; Mehta, Anita - In: Physica A: Statistical Mechanics and its Applications 283 (2000) 3, pp. 328-336

We have described a lattice model of a sandpile that includes a coupling between evolving granular structures and dynamic responses. The coupling manifests as a granular memory. We have illustrated the role of memory by observing avalanches in a (three)-dimensional model sandpile. There are two...

Persistent link: https://www.econbiz.de/10010591573

Vulnerabilities of networked energy infrastructure : a primer : Lifelines: the Resilient Infrastructure Opportunity : background paper

Schweikert, Amy; Nield, Lindsey; Otto, Erica; Klemun, … - 2019

Considerable work has been done to understand and improve the resilience of individual infrastructure components. However, systems of components, or even systems of systems, are far less well understood. Cascade effects, where the loss of one infrastructure affects others, is a major source of...

Persistent link: https://www.econbiz.de/10012052020

Robustness analysis of network controllability

Pu, Cun-Lai; Pei, Wen-Jiang; Michaelson, Andrew - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 18, pp. 4420-4425

Structural controllability, which is an interesting property of complex networks, attracts many researchers from various fields. The maximum matching algorithm was recently applied to explore the minimum number of driver nodes, where control signals are injected, for controlling the whole...

Persistent link: https://www.econbiz.de/10011057582

Analysis of cascading failure in complex power networks under the load local preferential redistribution rule

Wei, Du Qu; Luo, Xiao Shu; Zhang, Bo - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 8, pp. 2771-2777

In recent years several global blackouts have drawn a lot of attention to security problems in electric power transmission systems. Here we analyze the cascading failure in complex power networks based on the local preferential redistribution rule of the broken node’s load, where the weight of...

Persistent link: https://www.econbiz.de/10011061854

How Burial Time of Avalanche Victims is Influenced by Rescue Method: An Analysis of Search Reports from the Alps

Slotta-bachmayr, Leopold - In: Natural Hazards 34 (2005) 3, pp. 341-352

Two hundred and seventeen avalanche reports from Switzerland and the Tyrol were used to investigate the influence of … rescue method on the survival and burial time of avalanche victims. The probability of survival for victims rescued by their … significantly earlier and from a shallower burial depth than people who died in an avalanche. There is also a significant difference …

Persistent link: https://www.econbiz.de/10010846800

Temporal Trend and Spatial Distribution of Avalanche Activity during the Last 50 Years in Switzerland

Laternser, Martin; Schneebeli, Martin - In: Natural Hazards 27 (2002) 3, pp. 201-230

Avalanche observations are an important factor foroperational avalanche warningand the main parameter to carry out an … objectiveverification of the avalanche bulletinin retrospect. For the first time, a 50-year longseries of avalanche activity data of 84Swiss … avalanche observation stations is analysed anddiscussed. After careful datapreparation a regional avalanche activity index (RAAI …

Persistent link: https://www.econbiz.de/10010846929

AVALANCHE DYNAMICS OF THE FINANCIAL MARKET

ZHOU, PEI-LING; YANG, CHUN-XIA; ZHOU, TAO; XU, MIN; LIU, JUN - In: New Mathematics and Natural Computation (NMNC) 01 (2005) 02, pp. 275-283

A parsimonious percolation model for stock market is proposed, of which the avalanche dynamics agree with the real … about the formation of the bullish/bearish market and corresponding avalanche taking place in the market indicate that the … magnified "herd behavior" resulting from the evolution of p may be the origin of the observed avalanche phenomena. …

Persistent link: https://www.econbiz.de/10005080812

Scaling properties of avalanches from a collapsing granular pile

Jia, L.C; Lai, Pik-Yin; Chan, C.K - In: Physica A: Statistical Mechanics and its Applications 281 (2000) 1, pp. 404-412

Results of an experimental investigation of the scaling properties of a collapsing rice pile induced by reducing the length of the base support of the pile are reported. It is found that two angles of repose are needed to describe the shape of the collapsing granular pile. Corresponding to these...

Persistent link: https://www.econbiz.de/10010871720

Sandpile avalanche dynamics on scale-free networks

Lee, D.-S.; Goh, K.-I.; Kahng, B.; Kim, D. - In: Physica A: Statistical Mechanics and its Applications 338 (2004) 1, pp. 84-91

Avalanche dynamics is an indispensable feature of complex systems. Here, we study the self-organized critical dynamics …, we obtain the avalanche size and the duration distribution of sand toppling, which follow power-laws with exponents τ and …

Persistent link: https://www.econbiz.de/10011057737

Cascading toppling dynamics on scale-free networks

Goh, K.-I.; Lee, D.-S.; Kahng, B.; Kim, D. - In: Physica A: Statistical Mechanics and its Applications 346 (2005) 1, pp. 93-103

We study avalanche dynamics on scale-free networks, following a power-law degree distribution, pd(k)∼k-γ, through the … exponents for the avalanche size and the duration distributions analytically as a function of γ and η by using the branching … the static model and real-world networks. While numerical results of the avalanche size distribution for artificial …

Persistent link: https://www.econbiz.de/10011057771