In this blog I will derive the Einstein field equations starting from the Hilbert action.  Since there are only two terms in the Hilbert action, one of which is left alone, there is not that…

California faces an identity crisis.  The financial mismanagement is so well known that late-night talk show hosts make jokes about getting loans...from Greece.  Three years ago, third…

Well, not really a "true" queen sacrifice, but it is still a nice little combination the one I played against a strong 1st category player today at the "Baracchi Memorial" in Venice, a one-day rapid…

3) A scientific "paper" could be any file in the www2) The quotations should be always links: Not only to passages or texts, but also to images, audios, videos, blogs, sites, etc. - should be…

Helicopter parents rejoice - when you are not slathering on chemicals to make sure your cherubs never get any sunshine and scraping off deadly pathogens with antibacterial soap, you can further…

QUATERNIONS AND GROUP THEORY

A double-blind, placebo-controlled, crossover trial of sildenafil, brand name Viagra, showed improvement in echocardiogram measures of myocardial performance in children and young adults after Fontan…

It is very difficult to achieve this goal. Typically, fisheries undergo stocks permanently at different temporal and spatial scales of exploitation that exceeds the biological capacity and…

Anti-science hippies who invoke the precautionary principle to extremes (but only about their own causes) are not just an American cult phenomenon; Europe invented anti-science hysteria and the term…

What I didn't account for in my last blog post was that there is a first order energy shift due to classical physics.. to IS NOT relativitstic in nature.  This can be understood using E=hf and…

Don Ritchie earned the title of ‘the Angel of the Gap’ for his tireless attempts over the last 45 years, to dissuade people from jumping to their death from the high cliffs known as 'the Gap' at…

Environmental pollution is “the contamination of the physical and biological components of the earth/atmosphere system to such an extent that normal environmental processes are adversely affected”.…

This blog required programming.  The basic idea is to have four degrees of freedom for the four parameters living inside a four dimensional quaternion.  Four for loops did the trick. The…

In life, all good things come hard, but wisdom is the hardest to come by.Lucille Ball It's been coming, sure and steady. Dad's been promising for the last several years that at any time he could…

A little group theory a la QFT Demystified. David Tong's Procedure.  The Norm of the quaternion is --------------. The Norm of a biquaternion is --------------. Can I solve a problem is…

Derive SR from 1.Preservation of Causality and 2.The Constancy of the speed of light. with a focus on the spacetime interval. (like Brian Cox)

NEXT GENERATION BIOFUELS DEALING WITH ENVIRONMENT AND ENERGY   ＜Ashwani Kumar ＞ ＜  Department of Botany and Biotechnology, University of Rajasthan, Jaipur, 302004, India…

I recently found a physics book I've enjoyed so much I'd like to share it with others interested in physics. Because physics is a hobby for me and something I've studied in the past, I enjoy books…

As you may already know from the Science meets Society “interview” with me (from SMS’s published German version), Sascha Vongehr has finally left the postdoctoral limbo and entered some different…

HALOPHYTES AS POTENTIAL FOR BIOMASS YIELD IN COASTAL AREAS OF THE WORLD. . There's a limited amount of fresh water in the world and more demand for it than the supply can fill. India has several…