نتایج جستجو برای: avalanche dynamics

تعداد نتایج: 444605  

2001
Ian McCammon

Avalanche education has become widely available in the United States, and yet trained recreationists continue to comprise over a third of avalanche victims. Does avalanche education really make a difference? This study investigated the relationship between avalanche education and victim behavior in 344 recreational U.S. accidents, and found that victims with more avalanche training did in fact ...

2009
Jozef Černák

A non-Abelian and stochastic self organized criticality model has been proposed in which each avalanche contains one stochastic site and all remaining sites in the avalanche are deterministic. Studies of avalanche structures, waves and size moments showed the shell-like avalanche structures, correlated waves within avalanches and complex size moments. We may assert that the model shows multifra...

2013
L. de Arcangelis

Spontaneous brain activity has been recently characterized by avalanche dynamics with critical features for systems in vitro and in vivo. In this contribution we overview the experimental results and discuss a modelling approach implementing several physiological properties of living neurons which is able to reproduce experimental results for avalanche statistics. The temporal organization of a...

2014
H J Herrmann

Spontaneous brain activity has been recently characterized by avalanche dynamics with critical features for systems in vitro and in vivo. In this contribution we present a review of experimental results on neuronal avalanches in cortex slices, together with numerical results from a neuronal model implementing several physiological properties of living neurons. Numerical data reproduce experimen...

Journal: :IEEE Trans. Computers 1995
Howard M. Heys Stafford E. Tavares

Abstract — This paper develops analytical models for the avalanche characteristics of a class of block ciphers usually referred to as substitution-permutation encryption networks or SPNs. An SPN is considered to display good avalanche characteristics if a one bit change in the plaintext input is expected to result in close to half the ciphertext output bits changing. Good avalanche characterist...

2009
E. Muntán

A regional study of snow avalanche processes was undertaken in the SE Pyrenees. Dendrogeomorphology was used to date and reconstruct large-scale snow avalanche events that occurred in the last four decades. Dendrochronological analyses yielded the dates of nine winters when avalanches occurred in the recent past in six studied avalanche paths. Some of these avalanches were already known, but ot...

2001
M. Gassner

This paper presents two avalanche forecasting applications NXD2000 and NXD-REG which were developed at the Swiss Federal Institute for Snow and Avalanche Research (SLF). Even both are based on the nearest neighbour method they are targeted to different scales. NXD2000 is used to forecast avalanches on a local scale. It is operated by avalanche forecasters responsible for snow safety at snow spo...

2003
M. Bründl W. J. Ammann

After the avalanche winter of 1999 in Switzerland, which caused 17 deaths and damage of over CHF 600 mill. in buildings and on roads, the project IFKIS, aimed at improving the basics of organizational measures (closure of roads, evacuation etc.) in avalanche risk management, was initiated. The three main parts of the project were the development of a compulsory checklist for avalanche safety se...

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