| The authors propose a very eeective and exible peak power reduction scheme for Orthogonal Frequency Division Multiplexing OFDM with almost vanishing redundancy. This new method works with arbitrary numbers of subcarriers and unconstrained signal sets. The core of the proposal is to combine partial transmit sequences PTS to minimize the peakktoo average… (More)
We demonstrate that a practical concurrent language can be extended in a natural way with information security mechanisms that provably enforce strong information security guarantees. We extend the X10 concurrent programming language with coarse-grained information-flow control. Central to X10 concurrency abstractions is the notion of a place: a container… (More)
Visual biofeedback with information about the patients' degree of activity is a valuable adjunct to robot-assisted gait training as means of increasing the motivation and participation of the patients during highly repetitive training sessions. In the driven gait orthosis (DGO) Lokomat, an estimation of the patient's activity level was based on man-machine… (More)
A class of stored energy densities that includes functions of the form W (F) = a j F j p + g (F ; adj F) + h (det F) with a > 0, g and h convex and smooth, and 2 < p < 3 is considered. The main result shows that for each such W in this class there is a k > 0 such that, if a 3 b y 3 matrix F 0 satises h 0 (det F 0)jF 0 j 3p k, then W is W 1;p-quasiconvex at… (More)
There is currently no standardized approach for parsing output that the numerous bioinformatical tools generate. Because the framework approach of the Bio-toolkits has some shortcomings, we searched for alternative approaches. To this end, we evaluated scanner generators for various programming languages with respect to their potential of standalone, small… (More)
Chemical reaction networks with generalized mass-action kinetics lead to power-law dynamical systems. As a simple example, we consider the Lotka reactions and the resulting planar ODE. We characterize the parameters (positive coefficients and real exponents) for which the unique positive equilibrium is a center.
Chemical reaction networks with generalized mass-action kinetics lead to power-law dynamical systems. As a simple example, we consider the Lotka reactions with two chemical species and arbitrary power-law kinetics. We study existence, uniqueness, and stability of the positive equilibrium, in particular, we characterize its global asymptotic stability in… (More)