A review of the latest measurements of the primordial abundances of the light nuclei D, He, He and Li is given. We discuss in particular the primordial abundance Yp of He as measured in blue compact dwarf galaxies. We argue that the best measurements now give a “high” value of Yp along with a “low” value of D/H, and that the two independent measurements are consistent within the framework of st...

We examine the string cosmology equations with a dilaton potential, contrasting the requirements that the equations and their solutions have the desired a → 1/a pre-big bang symmetry, and give a generic algorithm for obtaining solutions with desired evolutionary properties. This enables us to find pre-big bang type solutions that are regular at t = 0, and with suitable dilaton behaviour. Howeve...

W find that experienced poker players typically change their style of play after winning or losing a big pot—most notably, playing less cautiously after a big loss, evidently hoping for lucky cards that will erase their loss. This finding is consistent with Kahneman and Tversky’s (Kahneman, D., A. Tversky. 1979. Prospect theory: An analysis of decision under risk. Econometrica 47(2) 263–292) br...

The paper " Big Bang Nucleosynthesis and Active-Sterile Neutrino Mixing: Evidence for Maximal ν µ ↔ ν τ Mixing in Super Kamiokande? " by X. Shi and G. M. Fuller (astro-ph/9810075) discusses the cosmological implications of the ν µ → ν s solution to the atmospheric neutrino anomaly. It incorrectly concludes that a lower bound on the ν τ mass of 15 eV is needed in order for the ν µ → ν s oscillat...

Itzhak Bars, Paul J. Steinhardt, 3 and Neil Turok Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089-0484 USA California Institute of Technology, Pasadena, CA 91125 Department of Physics and Princeton Center for Theoretical Physics, Princeton University, Princeton, NJ 08544, USA Perimeter Institute for Theoretical Physics, Waterloo, ON N2L 2Y5, Canada ...

disease by 30%," which sits uneasily with the report's own acceptance that the Medical Research Council's hypertension trial found "no significant effect on heart disease" from the reduction of mild to moderate hypertension. To have maximum impact such reports should surely offer no unprotected flanks to their critics and should concentrate on limited and attainable targets for which unimpeacha...

I review standard big bang nucleosynthesis and some versions of nonstandard BBN. The abundances of the primordial isotopes D, He-3, and Li-7 produced in standard BBN can be calculated as a function of the baryon density with an accuracy of about 10%. For He-4 the accuracy is better than 1%. The calculated abundances agree fairly well with observations, but the baryon density of the universe can...

The first theoretical evidence for the Big Bang came from Alexander Friedmann in 1922, when he showed that Albert Einstein’s theory of general relativity predicted that the universe was either expanding or contracting. Einstein was so upset with this result that he introduced a cosmological constant into his theory which would make the universe static. Later he said that this was his biggest bl...

Big data refers to the enormous heterogeneous being produced at a brisk pace by large number of diverse generating sources. Since traditional processing technologies are unable process big efficiently, is processed using newer distributed storage and frameworks. view materialization technique queries efficiently on these It generates valuable information, which can be used take timely decisions...