Benchtop studies are often used to evaluate cardiac ablation techniques, and commonly utilize ex-vivo animal tissues. While widely available, tissues do not consistently replicate live atrial tissue physical properties, adding variability. Tissue mimicking phantoms have been in non-cardiac studies, but their mechanical electrical properties may mimic tissue. Furthermore, analysis of lesions has...

This meta-analysis examines the effects of sorting secondary students into different tracks (“between-school” tracking) or classrooms (“within-school” on efficiency and inequality levels an educational system. Efficiency is related to overall learning achievement students, whereas can refer “inequality achievement” (i.e., dispersion outcomes) opportunity” strength influence family background st...

R. G. Canti [1916] bas used the hypobromite method for obtaining approximate values for the amount of urea in the cerebro-spinal fluid of patients suffering from a variety of diseases. Being desirous of controlling this method by others more reliable he asked R. L. M. Wallis to determine the urea by the urease method in some cases, and G. Graham by the Folin method in others, and the writer to ...

A nearly-massless, slowly-rolling scalar field φmay provide most of the energy density of the current universe. One potential difficulty with this idea is that couplings to ordinary matter, even if suppressed by the Planck scale, should lead to observable long-range forces and time dependence of the constants of nature. I explore the possibility that an approximate global symmetry serves to sup...

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