Elastomer biaxial characterization using bubble inflation technique. I: Experimental investigations

Efficient Driving of Piezoelectric Transducers Using a Biaxial Driving Technique

Efficient driving of piezoelectric materials is desirable when operating transducers for biomedical applications such as high intensity focused ultrasound (HIFU) or ultrasound imaging. More efficient operation reduces the electric power required to produce the desired bioeffect or contrast. Our preliminary work [Cole et al. Journal of Physics: Condensed Matter. 2014;26(13):135901.] suggested th...

Bubble fluctuations in Ω < 1 inflation

In the context of the open inflationary universe, we calculate the amplitude of quantum fluctuations which deform the bubble shape. These give rise to scalar field fluctuations in the open Friedman-Robertson-Walker universe which is contained inside the bubble. One can transform to a new gauge in which matter looks perfectly smooth, and then the perturbations behave as tensor modes (gravitation...

Single-bubble Open Inflation: an Overview

The idea that the universe might be open is an old one, and the possibility of having an open universe arise form inflation is not new either. However, a concrete realization of a consistent single-bubble open inflation model is known only recently. There has been great progress in the last two years in the development of models of inflation consistent with observations in such an open universe...

Area I. Multiphase Reactors and Processes: Experimental and Modeling Bubble and Slurry Bubble Columns

Bubble Expansion at the End of Inflation

S.G.Rubin Moscow Engineering Physics Institute, Center for Cosmoparticle Physics ”Cosmion” ABSTRACT A dynamic of a false vacuum decay is investigated at the end of inflation. It is shown that a creation of a new phase is mainly stimulated by temperature fluctuations. Colliding walls of O(3) symmetrical bubbles interact weakly with surrounding that leads to large field fluctuations. INTRODUCTION...