Previous timing data for PSR B1620−26 were consistent with a second companion mass m 2 anywhere in the range ∼ 10 −3 − 1 M ⊙ , i.e., from a Jupiter-type planet to a star. We present the latest timing parameters for the system, including a significant change in the projected semi-major axis of the inner binary, a marginal detection of the fourth time derivative of the pulse frequency, and the pu...

The paper investigates the structure of the reachable set of linear switched systems. The structure of the reachable set is determined using techniques from classical nonlinear systems theory, namely, the theory of orbits developed by H. Sussman and the realization theory for nonlinear systems developed by B. Jakubczyk.

Dealing with dialogues requires developing different levels of interpretation. An intention-based analysis must take into account discourse conventions and communication phenomena which shall result in coherent cooperative dialogues. The realisation of such a system is possible by distributing the tasks to independent agents. We show that the collaboration of these agents is possible by buildin...

Microtube implosions are a novel scheme to generate ultrahigh magnetic fields of the megatesla order. These driven by ultraintense and ultrashort laser pulses. Using two- three-dimensional particle simulations where megatesla-order can be achieved, we demonstrate scaling criteria in terms parameters, such as intensity energy, facilitate practical experiments toward realization extreme physical ...

Gauge fields are central in our modern understanding of physics at all scales. At the highest energy scales known, the microscopic universe is governed by particles interacting with each other through the exchange of gauge bosons. At the largest length scales, our Universe is ruled by gravity, whose gauge structure suggests the existence of a particle-the graviton-that mediates the gravitationa...

Cold atomic gases are perfect laboratories for realization of quantum simulators. In order to simulate solid state systems in the presence of magnetic fields special effort has to be made because atoms are charge neutral. There are different methods for realization of artificial magnetic fields, that is the creation of specific conditions so that the motion of neutral particles mimics the dynam...

Although the enterprise-wide benefits realization capability has been touted as the most robust way in which organisations can counter the still too common incidence of information systems failing to deliver their promised value, there has been no research to explore the validity of this claim. Consequently, the aim of this paper is to present the results of a three year, action research study,...

We consider a natural new inflationary model in broken supergravity based on an R symmetry. The model predicts a concrete relation between the amplitude of primordial density fluctuations and the scale of supersymmetry breaking. The observed value of the density fluctuations is obtained for the gravitino mass of order the weak scale along with a power-law spectral index considerably less than o...

Given a nonrational spectral density, minimality for square spectral factors with singularities in both the left and the right half planes is de ned. A parametrization of all minimal square spectral factors is then provided in terms of left inner divisors of a certain inner function depending only on the spectral density. Some results on matrix inner functions and minor complements on the Lindq...

In this paper we extend Kalman's concept of partial realization and deene generalized partial realizations of nite matrix sequences by descriptor systems. Our deenition is in agreement with the realization theory for deterministic boundary value descriptor systems 15]. The aim of this contribution is to prove a counterpart of Kalman's main theorem of realization theory for generalized partial r...