نتایج جستجو برای: computational phantoms
تعداد نتایج: 274208 فیلتر نتایج به سال:
Introduction: The concept of Parallel Excitation or Transmit SENSE [1-6] has shown its potential to reduce several problems of single channel excitation, e. g. offresonance or transverse relaxation effects, due to its pulse shortening capabilities. However, despite the shorter pulse lengths these deficiencies cannot be compensated completely. In this study a convenient and very general approach...
A model for remote replication of DNA is proposed. The motivating experimental discoveries are phantom DNA, the evidence for remote gene activation by scattered laser light from similar genome, and the recent findings of Montagnier’s and Gariaev’s groups suggesting remote DNA
In this paper we explain on various examples the “phantom tracking” method, a method which can be used to stabilize nonlinear control systems modeled by ordinary differential equations or partial differential equations. We show how it can handle global controllability, homogeneity issues or fast stabilization.
We evaluate vacuum energy density of Schnabl’s solution using the level truncation calculation and the total action including interaction terms. The level truncated solution provides vacuum energy density expected both for tachyon vacuum and trivial pure gauge. We discuss the role of the phantom term to reproduce correct vacuum energy. ∗E-mail address: [email protected]
We study dynamics of a dark energy component nonminimally coupled to gravity on a moving domain wall. We use this setup to explain late-time accelerated expansion and crossing of the phantom divide line by the equation of state parameter of this non-minimally coupled dark energy component. By analyzing parameter space of the model, we show that this model accounts for accelerated expansion and ...
Dark energy models with a single scalar field cannot cross the equation of state divide set by a cosmological constant. More general models that allow crossing require additional degrees of freedom to ensure gravitational stability. We show that a parameterized post-Friedmann description of cosmic acceleration provides a simple but accurate description of multiple scalar field crossing models. ...
We carry out a Bayesian model selection analysis of different dark energy parametrizations using the recent luminosity distance data of high redshift supernovae from Riess et al. 2007 and from the new ESSENCE Supernova Survey. Including complementary cosmological datasets, we found substantial evidence (∆ ln(E) ∼ 1) against a time-varying dark energy equation of state parameter, and against pha...
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