We generalize previous work on inhomogeneous pre-big bang cosmology by including the effect of non-trivial moduli and antisymmetric-tensor/axion fields. The general quasi-homogeneous asymptotic solution—as one approaches the big bang singularity from perturbative initial data—is given and its range of validity is discussed, allowing us to give a general quantitative estimate of the amount of in...

The recent search for a stochastic background of gravitational waves with LIGO interferometers has produced a new upper bound on the amplitude of this background in the 100 Hz region. We investigate the implications of the current and future LIGO results on pre-Big-Bang models of the early Universe, determining the exclusion regions in the parameter space of the minimal pre-Big Bang scenario. A...

We constrain proposed phenomenological models for a vacuum energy which decays with the expansion of the universe from considerations of standard big bang nucleosynthesis. Several models which are simple enough to be physically appealing are ruled out. Typeset using REVTEX

Introduction Since the late 1990s the evolution of center-periphery relationships in Russia became complicated by an additional factor that came into play as a result of the growth of capitalism and, more specifically, the territorial expansion of big businesses into the regions. Some of Russia’s major financial-industrial groups (FIGs) and the notorious oligarchs started to re-orient their act...

LIGO has completed a series of observations searching for evidence of a stochastic gravitational wave background. There has been no detection to date. However the sensitivity of the observations is approaching the Big Bang nucleosynthesis bound. Future observations will provide information that bounds a number of early Universe models of stochastic gravitational waves.

An upper limit on the masses of scalar superpartners in split supersymmetry is found by considering cosmological constraints on long-lived gluinos. Over most of parameter space, the most stringent constraint comes from big bang nucleosynthesis. A TeV mass gluino must have a lifetime of less than 100 seconds to avoid altering the abundances of D and Li. This sets an upper limit on the supersymme...

This study presents the design and real-time applications of an Interval Type-2 Fuzzy PID (IT2-FPID) control system on unmanned aerial vehicle (UAV) with a flexible cable-connected payload in comparison to Type-1 (T1-FPID) counterparts. The IT2-FPID has significant stability, disturbance rejection, response time advantages. To prove show these advantages, DJI Tello, commercial UAV, is used test...

Dynamic behaviour of a WMN imposes stringent constraints on the routing policy of the network. In the shortest path based routing the shortest paths needs to be evaluated within a given time frame allowed by the WMN dynamics. The exact reasoning based shortest path evaluation methods usually fail to meet this rigid requirement. Thus, requiring some soft computing based approaches which can repl...