Characteristics of Avalanche Disasters in Recent Years.

Avalanche Characteristics of Substitution-Permutation Encryption Networks

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...

Gain-Bandwidth Characteristics of Thin Avalanche Photodiodes

The frequency-response characteristics of avalanche photodiodes (APDs) with thin multiplication layers are investigated by means of a recurrence technique that incorporates the history dependence of ionization coefficients. In addition, to characterize the autocorrelation function of the impulse response, new recurrence equations are derived and solved using a parallel computer. The mean freque...

a synchronic and diachronic approach to the change route of address terms in the two recent centuries of persian language

terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...

Some recent advances in snow and avalanche science

The 2010 International Snow ScienceWorkshop (ISSW), was held in Squaw Valley, California, USA on 17–22 October. This biannual meeting of snow avalanche practitioners and scientists was the largest gathering to date, with over 920 participants, including 60 oral talks and 90 poster presentations, as compared to only 250 participants and 34 presentations when the meeting was last held in the Lake...

Lessons Learned from Remote Sensing Activities in Recent Natural Disasters