DLOG
2011
13 years 2 months ago
2011
We prove co-N2ExpTime-hardness for conjunctive query entailment in the description logic ALCOIF , thus improving the previously known 2ExpTime lower bound. The result transfers to ...
DLOG
2011
13 years 2 months ago
2011
We analyze the complexity of subsumption in probabilistic variants of the description logic EL. In the case where probabilities apply only to concepts, we map out the borderline be...
CORR
2011
Springer
13 years 2 months ago
2011
Springer
Complementation of finite automata on infinite words is not only a fundamental problem in automata theory, but also serves as a cornerstone for solving numerous decision problem...
TWC
2010
13 years 5 months ago
2010
A linear precoder is designed to minimize an upper bound of the pairwise error probability (PEP) when using arbitrary space-time block codes (STBC) over correlated Ricean fading c...
TWC
2010
13 years 5 months ago
2010
Abstract--We develop a new metric for quantifying end-toend throughput in multihop wireless networks, which we term random access transport capacity, since the interference model p...
TIT
2010
13 years 5 months ago
2010
This is the first part of a two-part paper on information-theoretically secure secret key agreement. In this part, we study the secrecy problem under the widely studied source mod...
SIAMDM
2010
13 years 5 months ago
2010
In this paper we consider the problem of computing the expected hitting time to a vertex for random walks on graphs. We give a method for computing an upper bound on the expected ...
IJNSEC
2010
13 years 5 months ago
2010
Lagged Fibonacci Generators (LFG) are used as a building block of key-streamgenerator in stream cipher cryptography. In this note we have used the self-shrinkingconcept in LFG and ...
CORR
2010
Springer
13 years 5 months ago
2010
Springer
We investigate the problem of secure communication over parallel relay channel in the presence of a passive eavesdropper. We consider a four terminal relay-eavesdropper channel wh...
TIT
2011
13 years 5 months ago
2011
Abstract—The following network computing problem is considered. Source nodes in a directed acyclic network generate independent messages and a single receiver node computes a tar...