All posts; Tags Include "Evolutionary Anthropology"
- September 4, 2013
- 06:36 AM
- 686 views
Penn Study: Shutting off Neurons Helps Bullied Mice Overcome Symptoms of Depression
by Perikis Livas in Chilon
Findings Point to New Potential Drug Target—GABA Neurons—to Treat Patients with Depression and Other Mood Disorders
(further reading and links at TK's page)... Read more »
Steve Graff. (2013) Penn Study: Shutting off Neurons Helps Bullied Mice Overcome Symptoms of Depression. Penn Medicine. DOI: 10.1523/JNEUROSCI.2383-13.2013
- September 3, 2013
- 12:24 PM
- 816 views
The reality of relations: the case from quantum physics
by Perikis Livas in Chilon
The view set out in this paper thus amounts to combining ontic structural realism with an ontology of objects that can be conceived as substances. This suggestion is illustrated by drawing on the ontology of quantum physics worked out by Bohm and Bell.... Read more »
Esfeld, Michael. (2013) The reality of relations: the case from quantum physics. PhilSci Archive. info:/
- September 3, 2013
- 11:10 AM
- 672 views
Associative account of self-cognition: extended forward model and multi-layer structure
by Perikis Livas in Chilon
The neural correlates of “self” identified by neuroimaging studies differ depending on which aspects of self are addressed. Here, three categories of self are proposed based on neuroimaging findings and an evaluation of the likely underlying cognitive processes.... Read more »
Motoaki Sugiura. (2013) Associative account of self-cognition: extended forward model and multi-layer structure. Frontiers in Neuroengineering. DOI: 10.3389/fnhum.2013.00535
- September 3, 2013
- 09:34 AM
- 913 views
Theoretical physics: The origins of space and time
by Perikis Livas in Chilon
Many researchers believe that physics will not be complete until it can explain not just the behaviour of space and time, but where these entities come from.... Read more »
Zeeya Merali. (2013) Theoretical physics: The origins of space and time. Nature. DOI: 10.1038/500516a
- September 3, 2013
- 03:57 AM
- 684 views
The blood-brain barrier: an engineering perspective
by Perikis Livas in Chilon
It has been more than 100 years since Paul Ehrlich reported that various water-soluble dyes injected into the circulation did not enter the brain. Since Ehrlich’s first experiments, only a small number of molecules, such as alcohol and caffeine have been found to cross the blood-brain barrier, and this selective permeability remains the major roadblock to treatment of many central nervous system diseases.... Read more »
Andrew D. Wong, Mao Ye, Amanda F. Levy, Jeffrey D. Rothstein, Dwight E. Bergles, & Peter C. Searson. (2013) The blood-brain barrier: an engineering perspective. Frontiers in Neuroengineering. DOI: 10.3389/fneng.2013.00007
- September 1, 2013
- 07:39 AM
- 938 views
Whales use distinct strategies to counteract solar ultraviolet radiation.
by Perikis Livas in Chilon
A current threat to the marine ecosystem is the high level of solar ultraviolet radiation (UV). Large whales have recently been shown to suffer sun-induced skin damage from continuous UV exposure. Genotoxic consequences of such exposure remain unknown for these long-lived marine species, as does their capacity to counteract UV-induced insults. We show that UV exposure induces mitochondrial DNA damage in the skin of seasonally sympatric fin, sperm, and blue whales and that this damage accumulates........ Read more »
Martinez-Levasseur LM, Birch-Machin MA, Bowman A, Gendron D, Weatherhead E, Knell RJ, & Acevedo-Whitehouse K. (2013) Whales use distinct strategies to counteract solar ultraviolet radiation. Scientific reports, 2386. PMID: 23989080
- August 31, 2013
- 05:06 PM
- 1,012 views
Milky Way Gas Cloud Causes Multiple Images of Distant Quasar
by Perikis Livas in Chilon
For the first time, astronomers have seen the image of a distant quasar split into multiple images by the effects of a cloud of ionized gas in our own Milky Way Galaxy. Such events were predicted as early as 1970, but the first evidence for one now has come from the National Science Foundation’s Very Long Baseline Array (VLBA) radio telescope system.... Read more »
A. B. Pushkarev, Y. Y. Kovalev, M. L. Lister, T. Hovatta, T. Savolainen, M. F. Aller, H. D. Aller, E. Ros, J. A. Zensus, J. L. Richards.... (2013) VLBA observations of a rare multiple quasar imaging event caused by refraction in the interstellar medium. Astronomy . arXiv: 1305.6005v1
- August 31, 2013
- 03:34 PM
- 782 views
Mega-canyon discovered beneath Greenland ice sheet
by Perikis Livas in Chilon
A previously unknown canyon hidden beneath two kilometres of ice covering Greenland has been discovered by a group of scientists, led by a team from the University of Bristol.
... Read more »
University of Bristol. (2013) Mega-canyon discovered beneath Greenland ice sheet. University of Bristol - Press Releases. DOI: 10.1126/science.1239794
- August 31, 2013
- 01:50 PM
- 675 views
The ‘genetics of sand’ may shed new light on evolutionary process over millions of years
by Perikis Livas in Chilon
A new paper by Dr Ezard, published today (9 August 2013) in the journal Methods in Ecology & Evolution, opens the debate on the best way to understand how new species come into existence (speciation). The debate concerns whether fossil records such as those of the planktonic foraminifera, contain useful evidence of speciation over and above the molecular study of evolution. Molecular evolution traditionally uses evidence from species that are alive today to determine what their ancestors may hav........ Read more »
University of Southampton. (2013) The ‘genetics of sand’ may shed new light on evolutionary process over millions of years. University of Southampton. DOI: 10.1111/2041-210X.12089
- August 27, 2013
- 07:10 AM
- 771 views
Honeyguide birds destroy own species’ eggs to eliminate competition
by Perikis Livas in Chilon
Like cuckoos, honeyguides are parasitic birds that lay their eggs in other birds’ nests and dupe them into raising their young. Now scientists reveal that, unlike in cuckoos, the resemblance between honeyguide eggs and those of their bee-eater bird hosts hasn’t evolved to trick hosts into accepting the imposter egg as one of their own. Rather, it appears to have evolved to trick other honeyguides who would otherwise destroy the eggs because of fierce competition for host nests. The n........ Read more »
University of Cambridge. (2013) Honeyguide birds destroy own species’ eggs to eliminate competition. University of Cambridge Research News. DOI: 10.1098/rsbl.2013.0573
- August 26, 2013
- 05:06 AM
- 637 views
Electrical signatures of consciousness in the dying brain
by Perikis Livas in Chilon
A University of Michigan animal study shows high electrical activity in the brain after clinical death... Read more »
Shantell Kirkendoll. (2013) Electrical signatures of consciousness in the dying brain. University of Michigan Health system. info:/
- August 11, 2013
- 02:32 PM
- 844 views
The day before death: A new archaeological technique gives insight into the day before death
by Perikis Livas in Chilon
The day before the child’s death was not a pleasant one, because it was not a sudden injury that killed the 10-13 year old child who was buried in the medieval town of Ribe in Denmark 800 years ago. The day before death was full of suffering because the child had been given a large dose of mercury in an attempt to cure a severe illness.... Read more »
Birgitte Svennevig. (2013) The day before death: A new archaeological technique gives insight into the day before death. Eurekalert. info:/
- August 7, 2013
- 07:33 AM
- 739 views
Stanford scientist looks for a deeper understanding of hearing through the bones in our heads
by Perikis Livas in Chilon
Stanford mechanical engineer Sunil Puria is unraveling the mysteries of bone conduction hearing, which could lead to a better understanding of hearing – and some types of hearing loss.... Read more »
GLEN MARTIN. (2013) Stanford scientist looks for a deeper understanding of hearing through the bones in our heads. Stanford University . info:/
- August 5, 2013
- 02:20 PM
- 1,085 views
Under leaden skies – where heavy metal clouds the stars
by Perikis Livas in Chilon
In a paper shortly to be published in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society, a team of astronomers from the Armagh Observatory in Northern Ireland report the discovery of two unusual stars with extremely high concentrations of lead in their atmospheres.
(further reading and links at TK's page)... Read more »
Royal Astronomical Society. (2013) Under leaden skies - where heavy metal clouds the stars. RAS News. info:/
- August 4, 2013
- 04:58 PM
- 708 views
Company’s profile : Hydro Infra Technologies
by Perikis Livas in Chilon
Hydro Infra Technologies STC AB is based in Stockholm, Sweden.
HIT is a Green-Tech innovation company.
HIT has created a gas called Hydro Nano Gas ( HNG) that safely & effectively neutralizes carbon fuel pollution emissions.... Read more »
Tracing Knowledge. (2013) Company's profile : Hydro Infra Technologies. Tracing Knowledge. info:/
- August 2, 2013
- 07:52 AM
- 949 views
Arctic methane and global economy
by Perikis Livas in Chilon
Ice melting releases methane stored in the form of hydrates in glaciers.
It has been estimated that there is a 50 gigatonne reservoir of methane on the East Siberian Arctic Shelf.
Researchers have for the first time calculated the potential economic impact of a scenario some scientists consider increasingly likely: that the methane below the East Siberian Sea will be emitted, either steadily over the next 30 years or suddenly and it will aggravate global economy as the estimated cost of miti........ Read more »
Tom Kirk. (2013) Cost of Arctic methane release could be ‘size of global economy’ warn experts. The University of Cambridge. info:/
- August 1, 2013
- 04:05 PM
- 859 views
A NEW BABY PICTURE OF THE UNIVERSE
by Perikis Livas in Chilon
On July 31, three leading members of the Planck research team — George Efstathiou and Anthony Lasenby of the Kavli Institute for Cosmology at the University of Cambridge, and Krzysztof Gorski, Senior Research Scientist at the Jet Propulsion Laboratory in Pasadena, CA, and faculty member at the Warsaw University Observatory in Poland — answered your questions about what was found and what this means to our understanding of the universe.... Read more »
The Kavli Foundation. (2013) A NEW BABY PICTURE OF THE UNIVERSE. The Kavli Foundation. info:/
- July 28, 2013
- 08:14 AM
- 805 views
The Oxford Questions on the foundations of quantum physics
by Perikis Livas in Chilon
The twentieth century saw two fundamental revolutions in physics—relativity and quantum. Daily use of these theories can numb the sense of wonder at their immense empirical success. Does their instrumental effectiveness stand on the rock of secure concepts or the sand of unresolved fundamentals? Does measuring a quantum system probe, or even create, reality or merely change belief? Must relativity and quantum theory just coexist or might we find a new theory which unifies the two? To bring........ Read more »
G. A. D. Briggs, J. N. Butterfield, & A. Zeilinger. (2013) The Oxford Questions on the foundations of quantum physics. Proceedings of the Royal Society A. DOI: 10.1098/rspa.2013.0299
- July 28, 2013
- 06:00 AM
- 844 views
R-parity violation
by Perikis Livas in Chilon
If nature is supersymmetric, then for each type of matter particle, there would be a corresponding supersymmetric force, and for each of the four forces, there would be a corresponding particle of supersymmetric matter. No evidence of supersymmetry has yet been found, despite the fervent searches, so you might be wondering why scientists are still looking for it.... Read more »
Jim Pivarski. (2013) R-parity violation. Fermilab. info:/
- July 27, 2013
- 02:34 PM
- 826 views
Wood-Boring Gribbles Intrigue Researchers
by Perikis Livas in Chilon
Gribbles (scientific name: Limnoria quadripunctata) are 1 to 3 millimeters long and have an organ called the hepatopancreas that extends almost the entire length of their bodies. This organ is where gribbles make their own enzymes. In other words, they don’t rely, as termites, cows, and humans do, on the organisms that find their way into their stomachs to aid in digesting the food they eat.
The gribble enzymes also hold promise of tolerating salts better than other enzymes, likely due ........ Read more »
Bill Scanlon. (2013) Wood-Boring Gribbles Intrigue Researchers. NREL Newsroom. info:/
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