Post List

  • February 18, 2011
  • 08:43 AM

Ashtekar and the BKL conjecture

by Marco Frasca in The Gauge Connection

Abhay Ashtekar is a well-known Indian physicist working at Pennsylvania State University. He has produced a fundamental paper in general relativity that has been the cornerstone of all the field of research of loop quantum gravity. Beyond the possible value that loop quantum gravity may have, we will see in the future, this result of [...]... Read more »

Abhay Ashtekar, Adam Henderson, & David Sloan. (2011) A Hamiltonian Formulation of the BKL Conjecture. arxiv. arXiv: 1102.3474v1

Marco Frasca. (2005) Strong coupling expansion for general relativity. Int.J.Mod.Phys. D15 (2006) 1373-1386. arXiv: hep-th/0508246v3

  • February 18, 2011
  • 08:00 AM

Eating More Calories Increases Weight (In Some People - Sometimes - Maybe)

by Arya M. Sharma in Dr. Sharma's Obesity Notes

According to the laws of physics when [calories in] exceed [calories out] people gain weight.
Unfortunately, when you actually deal with people (read: biological systems), this simple law is anything but simple. This is because, thanks to complex biological feedback mechanisms, designed by nature to keep us alive and thriving, changing caloric intake in turn affects [...]... Read more »

  • February 18, 2011
  • 06:51 AM

The ‘anti-laser’

by Joerg Heber in All That Matters

I don’t have much time this week and next to blog, but yesterday Science published an interesting paper by Hui Cao and colleagues at Yale that is hard to ignore. It is the ‘anti-laser’. In short, this anti-laser does exactly the same what a laser does, just with time reversed. You can do that because the [...]... Read more »

Wan, W., Chong, Y., Ge, L., Noh, H., Stone, A., & Cao, H. (2011) Time-Reversed Lasing and Interferometric Control of Absorption. Science, 331(6019), 889-892. DOI: 10.1126/science.1200735  

  • February 18, 2011
  • 06:34 AM

Animals with MRSA – a health problem crossing the species barrier

by Jennifer Appleton in Elements Science

Animals can catch MRSA from people and is a serious problem in veterinary surgeries. Jen Appleton reports on this widespread but often overlooked issue

Related posts:Pensioners defend their health and welfare state
Europe: towards sharing skills of health systems?
... Read more »

  • February 18, 2011
  • 03:37 AM

Friday Weird Science: Rats in PANTS

by Scicurious in Neurotic Physiology

Today’s Friday Weird Science comes to us courtesy of ProfLike Substance, who passed on this truly GLORIOUS paper to Sci many weeks ago. I’ve been dying to blog it for ages, but other things (like whale penises) seemed to always come up (you see what I did there) and required immediate blogging before someone else [...]... Read more »

  • February 17, 2011
  • 10:15 PM

Super Flop: Why did Groupon’s joke fall short?

by PsychBusyBee in ionpsych

Right before, during, and after the Super Bowl, Groupon ran three different ads for their online coupon site.

Watch this one and see what you think.

Immediately after these aired, twitter and other news sites were abuzz with disdain for the tasteless nature of the ads.  Why did these ads fall short? Continue reading →... Read more »

  • February 17, 2011
  • 09:40 PM

When a standard candle flickers: What happened when the Crab Nebula had a fit?

by mithy in The Enlightenment Junkie

I’ve previously blogged about extreme particle acceleration producing gamma-rays in many different astrophysical contexts, including galactic binary systems & blazars, but I haven’t talked in any great depth about another source of extremely high energy particles: supernova remnants. The Crab Nebula: a typical supernova remnant (Image: NASA/STScI) A supernova remnant is the remains of a [...]... Read more »

Balbo, M., Walter, R., Ferrigno, C., & Bordas, P. (2011) Twelve-hour spikes from the Crab Pevatron. Astronomy . DOI: 10.1051/0004-6361/201015980  

  • February 17, 2011
  • 09:03 PM

Possible Mechanical Forces Underlying Cancer Metastasis

by Michael Long in Phased

Mechanical forces, e.g. by extracellular matrix remodeling, may be important to cancer metastasis.... Read more »

  • February 17, 2011
  • 08:04 PM

A Lab Murder Mystery

by Linda in the Node

“A researcher is found dead hunched over her lab bench, and seven suspects are in custody. Now it’s up to 30 high school students to determine who killed her.” To quote from the UBC Science newsletter. Don’t be alarmed, this isn’t tabloid fodder. It’s actually part of a high school out-reach program, organized by UBC’s grad student [...]... Read more »

Caylib Durand and Santiago Ramón-García. (2010) The Use of Popular Fiction to Present a Professional Scientific Career to High School Students. JOURNAL OF MICROBIOLOGY , 166-167. info:/10.1128/jmbe.v11i2.19

  • February 17, 2011
  • 06:26 PM

Blood coming out the wazoo

by PalMD in White Coat Underground

The ICU can be a terrifying place for an intern.  Of course, the patients are probably a bit more frightened, but then, many of them are unconscious.  Rounds are endless in the ICU; new admissions, work rounds, teaching rounds, evaluations for transfer, afternoon rounds, lasix rounds (don’t ask), all punctuated by CPR codes on the [...]... Read more »

  • February 17, 2011
  • 04:28 PM

Beta hydroxybutyrate might make you smarter

by Lucas Tafur in Ketotic

BHB and derivatives could enhance memory and learning... Read more »

Zou XH, Li HM, Wang S, Leski M, Yao YC, Yang XD, Huang QJ, & Chen GQ. (2009) The effect of 3-hydroxybutyrate methyl ester on learning and memory in mice. Biomaterials, 30(8), 1532-41. PMID: 19111894  

  • February 17, 2011
  • 04:10 PM

The Functional Anatomy of Sitting: part 2

by potto in terrible puny rightness

In my last post on koalas I discussed how they evolved to fit into a very specific ecological niche and how they lost some brain in the process.  Here, I’d like to suggest that they might have also gained something perhaps more formidable than brain when it comes to survival these days:  Cuteness. Grand and [...]... Read more »

  • February 17, 2011
  • 04:08 PM

Long-term English language learners

by Ingrid Piller in Language on the Move

When I first started teaching in Australia, I had a Korean-Australian student in one of my undergraduate classes who sounded like most of the other students in my class, like a native speaker of Australian-English. The daughter of Korean immigrants, … Continue reading →... Read more »

  • February 17, 2011
  • 03:20 PM

XMRV infection of Rhesus macaques

by Vincent Racaniello in virology blog

The first detailed study of infection of nonhuman primates with the retrovirus XMRV reveals that the virus establishes a persistent infection characterized by infection of multiple tissues. Viremia (virus in the blood) is low and transient, with proviral DNA detectable in blood lymphocytes. The results show that the Rhesus macaque can be used to study [...]... Read more »

Onlamoon, N, DasGupta, J, Sharma, P, Rogers, K, Suppiah, S, Rhea, J, Molinaro, RJ, Gaughan, C, Dong, B, Klein, E.... (2011) Infection, viral dissemination and antibody responses of Rhesus macaques exposed to the human gammaretrovirus XMRV. Journal of Virology. info:/

  • February 17, 2011
  • 03:18 PM

A Decade of Penn Medicine Research Translates into a New Drug for Depression

by Kim Menard in Penn Medicine News Blog

Tucked away in two separate labs at the Department of Psychiatry at Penn Medicine, researchers have spent more than a decade researching and testing a new treatment for depression. The drug became the first new medicine to treat depression in more than a decade when it received FDA approval in January.... Read more »

  • February 17, 2011
  • 03:01 PM

Autism: Social Lives of Young Adults

by William Yates, M.D. in Brain Posts

One of the problems with understanding the natural history of autism is the lack of well-designed outcome studies in the disorder.  Outcome studies tend to be expensive and grant agencies commonly do not fund studies longer than a few years. However, given the increased interest and funding in autism, I suspect there will be more research in this area.An example of how outcome studies help in understanding the natural history of autism is a study published ahead of print by the Journal........ Read more »

  • February 17, 2011
  • 02:36 PM

Holifield needs your help

by nuclear.kelly in Miss Atomic Bomb

Below is the text of a letter in support of the continued operation of the Holifield Radioactive Ion Beam Facility at Oak Ridge National Lab. It currently has a dozen signatures attached to it, with more being added daily. If you agree with the letter, consider contacting your representatives and asking them to grant us a fair review.It would be a great tragedy to see the operating budget for the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory cut, as has been pr........ Read more »

Jones, K., Adekola, A., Bardayan, D., Blackmon, J., Chae, K., Chipps, K., Cizewski, J., Erikson, L., Harlin, C., Hatarik, R.... (2010) The magic nature of 132Sn explored through the single-particle states of 133Sn. Nature, 465(7297), 454-457. DOI: 10.1038/nature09048  

Beene, J., Bardayan, D., Galindo Uribarri, A., Gross, C., Jones, K., Liang, J., Nazarewicz, W., Stracener, D., Tatum, B., & Varner, R. (2011) ISOL science at the Holifield Radioactive Ion Beam Facility. Journal of Physics G: Nuclear and Particle Physics, 38(2), 24002. DOI: 10.1088/0954-3899/38/2/024002  

  • February 17, 2011
  • 12:49 PM

Clean water and education could outperform vaccines at reducing Haiti cholera epidemic

by Maria José Viñas in GeoSpace

Even though the deadly cholera epidemic in Haiti is now spreading more slowly, health officials are still working to prevent as many new cases as possible. Detailed models of the disease’s spread help those in charge of making public health decisions understand the effectiveness of control measures, from vaccines to investments in clean water supply and education.... Read more »

E. Bertuzzo, L. Mari, L. Righetto, M. Gatto, R. Casagrandi, M. Blokesch, I. Rodriguez-Iturbe, & A. Rinaldo. (2011) Prediction of the spatial evolution and effects of control measures for the unfolding Haiti cholera outbreak. Geophysical Research Letters. info:/10.1029

  • February 17, 2011
  • 12:17 PM

Chromothripsis and Cancer

by Daniel Koboldt in Massgenomics

The traditional cancer paradigm is one of progressive disease, in which cells gradually accumulate genomic rearrangements and point mutations over years (or decades), resulting in incremental progression through a series of increasingly malignant stages. New research has challenged that model. Using next-generation sequencing, Stephens et al have characterized a phenomenon in which tens to hundreds [...]... Read more »

Stephens PJ, Greenman CD, Fu B, Yang F, Bignell GR, Mudie LJ, Pleasance ED, Lau KW, Beare D, Stebbings LA.... (2011) Massive genomic rearrangement acquired in a single catastrophic event during cancer development. Cell, 144(1), 27-40. PMID: 21215367  

  • February 17, 2011
  • 12:00 PM

Can we count on journal metrics?

by sciencebase in Sciencebase Science Blog

How do you rank science, how do you rate scientists, what kudos do you give their papers and what metrics do you attach to the impact of a paper? They’re questions as old as the scientific literature itself. But, no one has resolved them. Independent organisations and publishers have attempted with the likes of the [...]Can we count on journal metrics? is a post from: Sciencebase Science Blog
... Read more »

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