We consider here the Chern-Simons field theory with gauge group SU(N) in the presence of a gravitational background that describes a two-dimensional expanding “universe”. Two special cases are treated here in detail: the spatially flat Robertson-Walker space-time and the conformally static space-times having a general closed and orientable Riemann surface as spatial section. The propagator and ...

The cosmological evolution in Nonlinear Born-Infeld(hereafter NLBI) scalar field theory with negative potentials was investigated. The cosmological solutions in some important evolutive epoches were obtained. The different evolutional behaviors between NLBI and linear(canonical) scalar field theory have been presented. A notable characteristic is that NLBI scalar field behaves as ordinary matte...

Interest in the role of basophils in immune responses has been rejuvenated recently. Demonstration of their ability to promote humoral memory responses,1 drive IgEdependent dermatitis, 2 and shift an immune response toward TH-2– dominated inflammation3,4 are some of the many biologic activities described. In this issue, Ohnmacht and Voehringer address the development and lifespan of basophils a...

Flat-top oscillons in an expanding universe. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Oscillons are extremely long lived, oscillatory, spatially localized f...

We investigate the tachyon coupling in a static Robertson–Walker like metric background. For a tachyon and dilaton field which are only time dependent one can rewrite this model as a SU(2) Wess–Zumino–Witten model and a scalar Feigin– Fuchs theory. In this case the restriction to a real exponential tachyon field fixes the level k of the Wess–Zumino–Witten model. For a spatially dependent tachyo...

Prions cause fatal and transmissible neurodegenerative disease. These etiological infectious agents are formed in greater part from a misfolded cell-surface protein called PrP(C). Several mammalian species are affected by the diseases, and in the case of "mad cow disease" (BSE) the agent has a tropism for humans, with negative consequences for agribusiness and public health. Unfortunately, the ...

In the present investigation, the possible effects of the expansion of the Universe on systems bonded either by gravitational or electromagnetic forces, are reconsidered. It will be shown that the acceleration (positive or negative) of the expanding background, is the determinant factor affecting planetary orbits and atomic sizes. In the presently accepted cosmology (ΛCDM) all bonded systems ar...

The gravitational clustering of collisionless particles in an expanding universe is modelled using some simple physical ideas. I show that it is possible to understand the nonlinear clustering in terms of three well defined regimes: (1) linear regime; (2) quasilinear regime which is dominated by scale-invariant radial infall and (3) nonlinear regime dominated by nonradial motions and mergers. M...

This article asks why people are obsessed with Jane Austen’s stories and why her stories are spreading across the globe, across media forms, and across generations? In an attempt to analyse the Austenmania-phenomenon, this article examines various representations of Austen’s Sense and Sensibility in order to discuss what these representations contribute with to the understanding of the source t...

In one of the most famous classic papers in the annals of science, Edwin Hubble’s 1929 PNAS article on the observed relation between distance and recession velocity of galaxies—the Hubble Law—unveiled the expanding universe and forever changed our understanding of the cosmos. It inaugurated the field of observational cosmology that has uncovered an amazingly vast universe that has been expandin...