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Weak Statistical Standards Implicated In Scientific Irreproducibility

upmufa Five Sigma or Bust (182 comments)

Five sigma is the standard of proof in Physics. The probability of a background fluctuation is a p-value of something like 0.0000006.

about a year ago

Dark Matter, WIMPS, and NASA's Alpha Magnetic Spectrometer Data

upmufa Old News With Smaller Error Bars (44 comments)

The really silly thing about the dust-up with AMS is that the PAMELA experiment (later confirmed by Fermi) made the exact same measurement and is credited with the discovery. AMS just re-did it with smaller error bars. Here's the original PAMELA paper from 2009: http://www.nature.com/nature/journal/v458/n7238/full/nature07942.html (preprint here: http://arxiv.org/abs/0810.4995 ) The dark matter interpretation isn't even new. All AMS has brought is smaller error bars.

about a year and a half ago

Fuel Cell Marvel "Bloom Box" Gaining Momentum

upmufa CO2 Emissions (562 comments)

It takes in hydrocarbons and oxygen and puts out energy? Am I a skeptic for thinking that this thing must be releasing lots of CO2? I cannot find any description of how it works. I have no doubt that it produces energy, but if it is producing gaseous CO2, it won't really help with the fundamental problem.

more than 4 years ago

Call For Scientific Research Code To Be Released

upmufa Re:Seems reasonable (505 comments)

In the case of publicly-funded research, I'd first like to compel scientists to publish their work in a free-to-read format. Many journals do not make the articles available to the public. It seems a little wrong that public money goes to pay for research and then the results of the research -- the journal articles -- aren't available to the public.

more than 4 years ago

Revenge of the Sith Easter Eggs

upmufa Re:huh? (569 comments)

When doing some physics (like quantum field theory) it is useful to adopt unit conventions where c=1. Using this convention, space and time would have same dimension. How long a time is 12 parsecs? It's the amount of time it takes light to travel 12 parsecs. In this unit system, speeds are dimensionless which might explain: "She'll make .5 past light speed."

more than 9 years ago



Progress in the Study of Galactic Cosmic Rays

upmufa upmufa writes  |  more than 6 years ago

upmufa (702569) writes "As we approach the 100-year anniversary of the discovery of cosmic rays, the origin of cosmic rays is still not known. Two remarkable results in the study of cosmic ray origin came out recently. The ATIC experiment, conducted on a balloon over Antarctica, has reported an excess of 300 — 850 GeV electrons which is not understood. Possible explanations include dark matter or a nearby cosmic-ray accelerator. Also the Milagro experiment in New Mexico has reported on two cosmic ray hot spots at 10 TeV which could be due to a nearby accelerator or some unknown magnetic effect. Both observations are distinct from the Auger AGN report because they are at lower energy and are probing Galactic cosmic rays. Interestingly, the Geminga pulsar has been floated as the source of both observations."
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