Abstract Avalanches result from an interaction of weather and terrain, where past internal snow cover processes play important roles. So far, climatology was mainly based on data, as regional instability information, such avalanche activity, is scarce climatological time scales. We present a new approach to create simulations problem types reanalysis data cluster analysis. Analyzing the winters...

By molecular-dynamics simulations, we have studied the devitrification (or crystallization) of aged hard-sphere glasses. First, we find that the dynamics of the particles are intermittent: Quiescent periods, when the particles simply "rattle" in their nearest-neighbor cages, are interrupted by abrupt "avalanches," where a subset of particles undergo large rearrangements. Second, we find that cr...

If the characteristics of s-boxes of the SAFER family of ciphers are examined for the criteria of strict avalanche, bit independence, and XOR table distribution, experiments show that the “exponentiating” s-box has a weakness for an input difference of 128 (=100000002) and the “logarithm-taking” s-box has a weakness for an input difference of 253 (=111111012). However, since these experiments a...

We study the abelian avalanche model, an analogue of the abelian sandpile model with continuous heights, which allows for arbitrary small values of dissipation. We prove that for non-zero dissipation, the infinite volume limit of the stationary measures of the abelian avalanche model exists and can be obtained via a weighted spanning tree measure. Moreover we obtain exponential decay of spatial...

We study the avalanche dynamics in the data-packet transport on scale-free networks through a simple model. In the model, each vertex is assigned a capacity proportional to the load with the proportionality constant 1+a . When the system is perturbed by a single vertex removal, the load of each vertex is redistributed, followed by subsequent failures of overloaded vertices. The avalanche size d...

A block cipher or a message authentication code(MAC ) should behave as random mapping which can be evaluated during statistical tests. Statistical test suites typically used for evaluation of random mapping are NIST, Diehard, Dieharder and TestU01 which are not well-suited for block ciphers and MAC s. These test suites employ frequentist approach;thus, making it difficult to overall evaluate th...