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Women played a key role in developing the first nuclear weapons. Their stories show how much science has to gain by recruiting from the whole population. AS THE LARGE-SCALE mobilization […]

Several letters to the editor are presented in response to articles in previous issues including one by Anil Ananthaswamy on a mechanical element to brain physiology in the August 31, 2013 issue, one on the use of algorithms to solve crimes in the September 7, 2013 issue, and one on the environmental impact of hydraulic fracturing (fracking) in the August 10, 2013 issue.

Several letters to the editor are presented in response to articles in previous issues including one on quantum wave-particle duality by Anil Ananthaswamy in the January 5, 2013 issue, "Sno myth: Eskimos really do have at least 50 words for snow," by David Robson in the December 22/29, 2012 issue, and one on wind power by Reg Platt in the January 19, 2013 issue.

Several letters to the editor are presented in response to articles from previous issues, including an article about synesthesia from the December 22/29, 2012 issue, a report on the effect of the enteric nervous system on the brain from the December 15, 2012 issue, and an article about the risks of global warming on the coffee supply from the January 5, 2013 issue,

Several letters to the editor are presented in response to articles in previous issues including one on the role of climate change in extreme weather, one on the fear of death by Shelly Kagan, and one on brain-death testing by Dick Teresi, all in the October 20, 2012 issue.

Several letters to the editor are presented in response to articles in previous issues including one on sex-testing rules for female athletes by Katrina Karkazis and Rebecca Jordan-Young in the July 21, 2012 issue, one on sports engineering by Steve Haake in the July 7, 2012 issue, and one on ocean iron fertilization in the July 21, 2012 issue.

Several letters to the editor are presented in response to articles in previous issues including one on the assassination of an Iranian scientist, "Forbidden reactions," by Philip Ball, which discusses chemistry, and one on the evolution of mammals, all in the January 21, 2012 issue.

Letters to the editor are presented in response to articles from previous issues including an article including a reference to "honest bankers" by Ian Stewart in the November 19, 2011 issue, an article discussing experiments measuring the speed of neutrinos against the speed of light in the October 1, 2011 issue, and a report on cognitive-enhancing drugs by Susan Watt in the November 19, 2011 issue.

This paper brings into focus the instrumentation needs of future demonstration-scale coal conversion and combustion plants which may be met with new instrumentation based on neutron-induced gamma techniques. Progress in automated multielement analysis of coal process streams is described, and the application of activation flowmetering to mass flow measurements in coal slurries is discussed.