We consider a variant of the game of Cops and Robbers, called Lazy Cops and Robbers, where at most one cop can move in any round. We investigate the analogue of the cop number for this game, which we call the lazy cop number. Lazy Cops and Robbers was recently introduced by Offner and Ojakian, who provided asymptotic upper and lower bounds on the lazy cop number of the hypercube. By coupling th...

DSA and ECDSA are well established standards for digital signature based on the discrete logarithm problem. In this paper we survey known properties, certification issues regarding the public parameters, and security proofs. ECDSA also includes a standard certification scheme for elliptic curve which is assumed to guarantee that the elliptic curve was randomly selected, preventing from any pote...

In component-based software engineering, the response time of an entire application is often predicted from the execution durations of individual component services. However, these execution durations are specific for an execution platform (i.e. its resources such as CPU) and for a usage profile. Reusing an existing component on different execution platforms up to now required repeated measurem...

This work is devoted to the formulation and derivation of the κ − μ/gamma distribution which corresponds to A physical fading model. This distribution is composite and is based on the well known κ − μ generalized multipath model and the gamma shadowing model. A special case of the derived model constitutes the κ − μ Extreme/gamma model which accounts for severe multipath and shadowing effects. ...

The computation of robust H∞ performance of linear systems subject to polytopic parametric uncertainty is known to be a difficult problem in robust control. In this paper, quadratic parameter-dependent Lyapunov functions, with polynomial dependence on the uncertain parameters, are exploited to provide upper bounds to the robust H∞ performance. It is shown that such bounds can be computed via co...

Abstract: Existing control theory for linear parameter varying system uses a uniform upper bound on the induced-L2 norm for the varying parameters. In this paper, this constant is generalized as a function of parameters, the design provides varying induced-L2 performance in the presence of real-time variations and consequently gives rise to the superior robust performance of the local operating...

The NTRUSign signature scheme was introduced in [8]. The original presentation gave a theoretical description of the scheme and an analysis of its security, along with several parameter choices which claimed to yield an 80 bit security level. The paper [8] did not give a general recipe for generating parameter sets to a specific level of security. In line with recent research on NTRUEncrypt [9]...

Publications are increasingly (often wrongly) being used as research outputs. Furthermore, ‘impacts’ of such publications are often (wrongly as well) measured using ‘citations’. Popular metric, like the ‘Hirsch index’, or ‘h-index’ is used as yardstick for judging the quality of individual researchers. However, there are many controversies around it, whether it is a good yardstick, which could ...

This paper describes a robust set-membership-based Fault Detection and Isolation (FDI) technique for a particular class of nonlinear systems, the so-called flat systems. The proposed strategy consists in checking if the expected input value belongs to an estimated feasible set computed using the system model and the derivatives of the measured output vector. The output derivatives are computed ...