The Dawn of a New Epoch

A New Calculation of the Recombination Epoch

We have developed an improved recombination calculation of H, He i, and He ii in the early universe that involves a line-by-line treatment of each atomic level. We find two major differences compared with previous calculations. First, the ionization fraction xe is approximately 10% smaller for redshifts &800 because of nonequilibrium processes in the excited states of H. Second, He i recombinat...

The dawn of a new era.

This paper reviews the scientific events culminating in the fluoridation of communal water supplies. Dental and medical studies completed by 1942 had established the safety and benefits of exposure to drinking water naturally containing fluoride. Researchers and public health workers concluded that it was possible to test the hypothesis that the dental benefits attained where fluoride levels ar...

Dawn of a new era

The political, social and economic environment of the pharmaceutical industry is constantly changing, forcing it to prepare for a future that will embrace a more holistic vision of healthcare. A future outlook developed by Novo Nordisk, a pharmaceutical company specialising in diabetes care, for the year 2020 and beyond showed that knowledge management and networking will be the prime drivers o...

new semigroup compactifications via the enveloping semigroups of associated flows

this thesis deals with the construction of some function algebras whose corresponding semigroup compactification are universal with respect to some properies of their enveloping semigroups. the special properties are of beigan a left zero, a left simple, a group, an inflation of the right zero, and an inflation of the rectangular band.

Constraining the Astrophysics of the Cosmic Dawn and the Epoch of Reionization with the SKA