In this work, a class of information theoretic secrecy problems is addressed where the eavesdropper channel states are completely unknown to the legitimate parties. In particular, MIMO wiretap channel models are considered where the channel of the eavesdropper is arbitrarily varying over time. Assuming that the number of antennas of the eavesdropper is limited, the secrecy rate of the MIMO wire...

The multiterminal hypothesis testing for arbitrarily varying sources (AVS) is considered. This is an extension of Han’s [1] and Ahlswede-Csiszár [2] schemes for a more general class of sources. In part, the solutions can be easily specialized for earlier known particular cases.

Random coding theorems are proved for discrete memoryless arbitrarily varying channels (AVCs) with constraints on the transmitted codewords and channel state sequences. We consider two types of constraints peak (i.e., required for eacb n-length sequence almost d y ) and average (over the message set or over an ensemble). For peak constraints on the c o d e d and on the channel state sequences, ...

Diffusion-based microfluidic devices can generate steady, arbitrarily shaped chemical gradients without requiring fluid flow and are ideal for studying chemotaxis of free-swimming cells such as bacteria. However, if microfluidic gradient generators are to be used to systematically study bacterial chemotaxis, it is critical to evaluate their performance with actual quantitative chemotaxis tests....