Arunaway pacemaker is a malfunctioning pacemaker that paces the heart at rapid rates. A report from Australia 30 years ago1 described a patient with runaway pacemaker that paced the ventricles at 280 bpm. The patient survived only because one of the coauthors alertly cut the pacemaker wires to disconnect the high-frequency focal source from the myocardium. In this issue of Circulation, Thomas e...

In the framework of the Chandrasekhar-mass deflagration model for Type Ia supernovae (SNe Ia), a persisting free parameter is the initial morphology of the flame front, which is linked to the ignition process in the progenitor white dwarf. Previous analytical models indicate that the thermal runaway is driven by temperature perturbations (“bubbles”) that develop in the white dwarf’s convective ...

A new interpretation for the second peak of T Coronae Borealis (T CrB) outbursts is proposed based on a thermonuclear runaway (TNR) model. The system consists of a very massive white dwarf (WD) with a tilting accretion disk and a lobe-filling red-giant. The first peak of the visual light curve of T CrB outbursts is well reproduced by the TNR model on a WD close to the Chandrasekhar mass (MWD ∼>...

We propose a scenario for dynamical supersymmetry breaking in string compactifications based on geometric engineering of quiver gauge theories. In particular we show that the runaway behavior of fractional branes at del Pezzo singularities can be stabilized by a flux superpotential in compact models. Our construction relies on homological mirror symmetry for orientifolds. [email protected]...

realized that ‘sex sells’. At the biological level, their interplay goes much further back to the Cambrian explosion around 530 million years ago. During this period of rapid evolutionary expansion, multicellular organisms began to evolve elaborate sexual ornaments to advertise their genetic quality to the most important consumers of all in the great mating market of life: the opposite sex. Mai...

References ml#ref-list-1 http://rspa.royalsocietypublishing.org/content/466/2114/363.full.ht This article cites 18 articles, 1 of which can be accessed free Subject collections (8 articles) glaciology • Articles on similar topics can be found in the following collections Email alerting service here the box at the top right-hand corner of the article or click Receive free email alerts when new ...