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December 14, 2012

2:00 PM | Annotated Machine: How Robots Could Recycle Dead Satellites In Orbit

DARPA's plan to recycle the orbiting satellite graveyard Approximately 1,300 nonfunctional satellites sit in a graveyard orbit 22,000 miles above Earth-and Darpa has plans for them. Recycling dead satellite parts in space could be 10 times cheaper than building and sending up new satellites, says Darpa program manager Dave Barnhart. Earlier this year, the agency started the Phoenix project, which will use robots to salvage parts from decommissioned satellites as soon as 2015. First step: […]

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A deeper look at the geology of diamonds

The geology of diamonds is fascinating in itself, but they also give insights into wider geological processes and history. Up until 1725, diamonds were only known from India. That all changed when Brazilians panning river sediments for gold, instead found diamonds. Recent … Continue reading →

Harte, B. & Richardson, S. (2012). Mineral inclusions in diamonds track the evolution of a Mesozoic subducted slab beneath West Gondwanaland, Gondwana Research, 21 (1) 236-245. DOI: 10.1016/j.gr.2011.07.001

Harte, B. & Cayzer, N. (2007). Decompression and unmixing of crystals included in diamonds from the mantle transition zone, Physics and Chemistry of Minerals, 34 (9) 647-656. DOI: 10.1007/s00269-007-0178-2

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Shrinking Alligator Penises: Using Wildlife Models to Study How Chemical Contaminants May Affect Human Reproductive Systems (Guest Post)

Erin on the side of a river somewhere in western NC, hard at work study obviously. Erin Abernethy is a Master’s student in the Odum School of Ecology at the University of Georgia, where she is studying scavenging ecology in Hawaii. Before coming to Athens, Erin lived in North Carolina earning her BS in Biology at Appalachian State. For that degree,

Guillette Jr., L., Pickford, D., Crain, D., Rooney, A. & Percival, H. (1996). Reduction in Penis Size and Plasma Testosterone Concentrations in Juvenile Alligators Living in a Contaminated Environment, General and Comparative Endocrinology, 101 (1) 32-42. DOI: 10.1006/gcen.1996.0005

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The extinction of the Irish brown bear

A new study by Saoirse Leonard and co-authors from the Institute of Zoology, London and the University of Liverpool model the potential survival of brown bears in an Irish glacial refugium. The study has just been published in Biology Letters, and … Continue reading →

Leonard, S., Risley, C. & Turvey, S. (2013). Could brown bears (Ursus arctos) have survived in Ireland during the Last Glacial Maximum?, Biology Letters, 9 (4) 20130281-20130281. DOI: 10.1098/rsbl.2013.0281

Edwards, C., Suchard, M., Lemey, P., Welch, J., Barnes, I., Fulton, T., Barnett, R., O'Connell, T., Coxon, P., Monaghan, N. & Valdiosera, C. (2011). Ancient Hybridization and an Irish Origin for the Modern Polar Bear Matriline, Current Biology, 21 (15) 1251-1258. DOI: 10.1016/j.cub.2011.05.058

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Some Quantized Flux History

In 1961, William Fairbank and Bascomb Deaver experimentally verified that magnetic flux can be quantized. This week I read an excellent paper on the history of the experiment[1]. For those who aren't close to a library with access to the journal, (and for my own notes), here are a few of the highlights. For more info on the Fairbank/Deaver experiment see[4] .The Other ExperimentThe first interesting thing you should know is that there was a similar experiment […]

Einzel D. (2011). 50 Years of Fluxoid Quantization: 2e or Not 2e, Journal of Low Temperature Physics, 163 (5-6) 215-237. DOI: 10.1007/s10909-011-0349-x

Doll R. & Näbauer M. (1961). Experimental Proof of Magnetic Flux Quantization in a Superconducting Ring, Physical Review Letters, 7 (2) 51-52. DOI: 10.1103/PhysRevLett.7.51

Byers N. & Yang C. (1961). Theoretical Considerations Concerning Quantized Magnetic Flux in Superconducting Cylinders, Physical Review Letters, 7 (2) 46-49. DOI: 10.1103/PhysRevLett.7.46

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‘Is ‘cloning’ mad, bad and dangerous?’ – an argument revisited

Seven years ago, to mark the then tenth anniversary of the announcement of the birth of the folkloric Dolly the sheep, and in the still reverberating wake of the South Korean cloning scandal, I practiced my fledgling/intermittent/debatable/wanton science communication skills with the penning of an article on the issue of ‘cloning.’ It being an anniversary with a ’0′ on the end, combined with topical relevance, suggested I might be lucky enough to get it published. And I was thus very... […]

Tachibana, M., Amato, P., Sparman, M., Gutierrez, N., Tippner-Hedges, R., Ma, H., Kang, E., Fulati, A., Lee, H., Sritanaudomchai, H. & Masterson, K. (2013). Human Embryonic Stem Cells Derived by Somatic Cell Nuclear Transfer, Cell, DOI: 10.1016/j.cell.2013.05.006

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December 14, 2012

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