Compared to some of its later, gargantuan cousins, the 190-million-year-old sauropodomorph dinosaur Sarahsaurus aurifontanalis was a rather tiny herbivore. Only 14 feet long, this dinosaur lived in the early days of the Jurassic, and, according to a team of paleontologists led by Jackson School of Geosciences paleontologist Timothy Rowe, this newly-described dinosaur from Arizona does [...]... Read more »
Timothy B. Rowe, Hans-Dieter Sues, and Robert R. Reisz. (2010) Dispersal and diversity in the earliest North American sauropodomorph dinosaurs, with a description of a new taxon. Proceedings of the Royal Society B. info:/10.1098/rspb.2010.1867
When do liberals and conservatives veer away from their traditional styles of decision-making? How can you predict this and incorporate it into your case narrative strategy?... Read more »
Morgan GS, Mullen E, & Skitka LJ. (2010) When values and attributions collide: liberals' and conservatives' values motivate attributions for alleged misdeeds. Personality and social psychology bulletin, 36(9), 1241-54. PMID: 20699405
There is a potentially exciting new paper in Nature that challenges entrenched ideas about how adaptation proceeds. I say potentially, because I have some serious misgivings I'd like to share. But first, a brief overview of the Burke et al. paper.
Michael Rose's lab has had a long-term experimental evolution project with Drosophila melanogaster running for about 20 years. This is an amazing ... Read more »
Burke MK, Dunham JP, Shahrestani P, Thornton KR, Rose MR, & Long AD. (2010) Genome-wide analysis of a long-term evolution experiment with Drosophila. Nature, 467(7315), 587-90. PMID: 20844486
Fossil tracks – the clear imprints of living creatures – have often sparked the imagination of those who have found them. When, in 1802, a young boy found footprints in stone on his family’s South Hadley, Massachusetts farm some of the tracks wound up as a doorstop. Visitors joked that the family must have raised [...]... Read more »
PADIAN, K., LI, C., & PCHELNIKOVA, J. (2010) The trackmaker of (Late Triassic, North America): implications for the evolution of archosaur stance and gait . Palaeontology, 53(1), 175-189. DOI: 10.1111/j.1475-4983.2009.00924.x
An open or shut case for nanotechnology secrets Should nanotechnology R&D be more open to allow it to thrive in the commercial world, or should companies working in this field be more secretive? Paradoxically, the answer seems to be that keeping secrets stifles innovation and reduces patent success. According to Associate Professor of Management at [...]Unlocking nano secrets is a post from: Sciencebase Science Blog
... Read more »
G. Steven McMillan. (2010) Openness vs. secrecy in nanotechnology. International Journal of Technology Intelligence and Planning, 6(3), 205-209. info:/
Yesterday, on my flight to San Diego to attend the 28th Annual Scientific Meeting of The Obesity Society, I had the opportunity to catch up on some of my reading.
Two recent articles in the Journal of the American Medical Association (JAMA) caught my attention, as they related to topics that I have recently blogged about.
The [...]... Read more »
Kindig D, & Mullahy J. (2010) Comparative effectiveness--of what?: evaluating strategies to improve population health. JAMA : the journal of the American Medical Association, 304(8), 901-2. PMID: 20736476
Kraemer HC, & Frank E. (2010) Evaluation of comparative treatment trials: assessing clinical benefits and risks for patients, rather than statistical effects on measures. JAMA : the journal of the American Medical Association, 304(6), 683-4. PMID: 20699462
Other scientists out there! Hi. Can we agree that Fst, as wonderful as it's been, has run its course? It was a good idea - a great first crack at population genetics. When Wright came up with it, it was a wonderful idea. And for some applications - those where heterozygosity is generally low (I'm looking at you allozymes) - it works quite nicely. But once you're outside the Hs of .4 to .6, your ... Read more »
GERLACH, G., JUETERBOCK, A., KRAEMER, P., DEPPERMANN, J., & HARMAND, P. (2010) Calculations of population differentiation based on GST and D: forget GST but not all of statistics!. Molecular Ecology, 19(18), 3845-3852. DOI: 10.1111/j.1365-294X.2010.04784.x
While we were playing “cite the oldest paper“, Pam Silver suggested this paper (Srb, AM and Horowitz, NH, 1944. The ornithine cycle in Neurospora and its genetic control. J. Biol. Chem 154 129-139), as a distant antecedent of the field we now call systems biology. Published only three years after Beadle and Tatum used Neurospora [...]... Read more »
Srb, AM, & Horowitz, NH. (1944) The ornithine cycle in Neurospora and its genetic control. J. Biol. Chem , 129-139. info:/
Sibling differentiation, identity development, and the lateral dimension of psychic life From Journal of the American Psychoanalytic Association Last week in UK politics some commentators remarked how “brotherly love took a backseat to a lust for power” as the Miliband brothers competed against each other for the position of Labour party leader. Shortly after Ed [...]... Read more »
Vivona, J. (2007) Sibling Differentiation, Identity Development, and the Lateral Dimension of Psychic Life. Journal of the American Psychoanalytic Association, 55(4), 1191-1215. DOI: 10.1177/000306510705500405
To evolutionary psychologists, the noise made by gorillas, chimps and bonobos when you tickle their feet is no laughing matter. These distinctive vocalisations suggest that rather than evolving separately, laughter evolved in a shared common ancestor before becoming tailored in each primate species, including humans.
To find support for this idea, Diana Szameitat and her colleagues scanned the brains of 18 men and women whilst they listened to the sound of human tickle-induced laughter as well ........ Read more »
Szameitat, D., Kreifelts, B., Alter, K., Szameitat, A., Sterr, A., Grodd, W., & Wildgruber, D. (2010) It is not always tickling: Distinct cerebral responses during perception of different laughter types. NeuroImage, 53(4), 1264-1271. DOI: 10.1016/j.neuroimage.2010.06.028
Before this piece of research gets out of hand due to shoddy science journalism, it does not conclude that people should sleep longer to lose weight. The paper is titled "Insufficient sleep undermines dietary efforts to reduce adiposity", which means that if you are person dieting to lose fat then sleeping less will undermine your efforts.
The study compares a group of 10 who were dieting, 6 persons slept for 8.5 hours every night for two weeks and similarly, 4 persons slept for 5.5 hours every........ Read more »
Nedeltcheva AV, Kilkus JM, Imperial J, Schoeller DA, & Penev PD. (2010) Insufficient sleep undermines dietary efforts to reduce adiposity. Annals of internal medicine, 153(7), 435-41. PMID: 20921542
A number of news outlets have picked up on a new article in Environmental Research Letters by Andy Challinor and a team at the University at Leeds. The standard headline is "Crop Failures to Increase With Climate Change," but I think the much more interesting part of the research is the author's creation of a vulnerability index based on the historical crop data in China. Essentially, they looked at periods of drought in the past, and examined how well farmers were able to mitigate t........ Read more »
Challinor, A., Simelton, E., Fraser, E., Hemming, D., & Collins, M. (2010) Increased crop failure due to climate change: assessing adaptation options using models and socio-economic data for wheat in China. Environmental Research Letters, 5(3), 34012. DOI: 10.1088/1748-9326/5/3/034012
We live in a world that is full of risk, risks that we to a large degree have created ourselves, and where naturally occuring risk hardly exists anymore. That is a risk society.... Read more »
Hovden, J. (2004) Public policy and administration in a vulnerable society: regulatory reforms initiated by a Norwegian commission. Journal of Risk Research, 7(6), 629-641. DOI: 10.1080/1366987042000192228
As a general rule, the cells of your body ought only grow, survive and proliferate when so directed by upstream messages, hormonal or otherwise. In light of the supreme importance of proper and well-timed growth, it is these messaging systems that have recently become the stars of the show. One area of particular importance is [...]... Read more »
Cordeira, J., Frank, L., Sena-Esteves, M., Pothos, E., & Rios, M. (2010) Brain-Derived Neurotrophic Factor Regulates Hedonic Feeding by Acting on the Mesolimbic Dopamine System. Journal of Neuroscience, 30(7), 2533-2541. DOI: 10.1523/JNEUROSCI.5768-09.2010
Barbara Bramanti (Johannes Gutenberg University, Germany) and coworkers present conclusive biochemical (DNA and protein) evidence that Yersinia pestis, of multiple and possibly extinct lineages, was responsible for the Black Death of medieval Europe. This news feature was written on October 7, 2010.... Read more »
Haensch, S., Bianucci, R., Signoli, M., Rajerison, M., Schultz, M., Kacki, S., Vermunt, M., Weston, D. A., Hurst, D., Achtman, M.... (2010) Distinct Clones of Yersinia pestis Caused the Black Death. PLoS Pathogens, 6(10). DOI: 10.1371/journal.ppat.1001134
In case you haven't noticed, the concept of internal forward models -- an internal prediction about a future event or state -- are all the rage. The concept comes out of the motor control literature where one can find pretty solid evidence that motor control makes use of forward predictions of the sensory consequences of motor commands (e.g., check out the seminal paper by Wolpert, Ghahramani, & Jordan, 1995). These concepts have been extended to speech (e.g., Tourville et al. 2008; van Wassen........ Read more »
There’s a new paper in this week’s issue of Science that suggests that growing a landscape mixed with genetically modified (GM) Bt corn and non-GM hybrid varieties of corn can be mutually beneficial to all corn farmers.
Why? They argue that the populations of GM corn knock down the populations of insect herbivores enough that, on [...]... Read more »
Hutchison, W., Burkness, E., Mitchell, P., Moon, R., Leslie, T., Fleischer, S., Abrahamson, M., Hamilton, K., Steffey, K., Gray, M.... (2010) Areawide Suppression of European Corn Borer with Bt Maize Reaps Savings to Non-Bt Maize Growers. Science, 330(6001), 222-225. DOI: 10.1126/science.1190242
by Kevin in We Beasties
Now the damn biofilms let the bacteria get up and walk. We're doomed!... Read more »
Gibiansky, M., Conrad, J., Jin, F., Gordon, V., Motto, D., Mathewson, M., Stopka, W., Zelasko, D., Shrout, J., & Wong, G. (2010) Bacteria Use Type IV Pili to Walk Upright and Detach from Surfaces. Science, 330(6001), 197-197. DOI: 10.1126/science.1194238
[Wherein our hero, sleepy from all his blogging, decides to take a nap. But is a siesta such a good idea?]
Here in Australia it's just getting into Summer. And the trick with 'getting into summer' is enduring the brief but painful transition from cool to hot. It usually only last a few weeks, but it's a few weeks characterised by sleeplessness, crankiness and trying to get u; (read more)
Source: Rift - Discipline: Psychology... Read more »
HORNE, J., ANDERSON, C., & PLATTEN, C. (2008) Sleep extension versus nap or coffee, within the context of ‘sleep debt’. Journal of Sleep Research, 17(4), 432-436. DOI: 10.1111/j.1365-2869.2008.00680.x
Milner CE, & Cote KA. (2009) Benefits of napping in healthy adults: impact of nap length, time of day, age, and experience with napping. Journal of sleep research, 18(2), 272-81. PMID: 19645971
Zhao D, Zhang Q, Fu M, Tang Y, & Zhao Y. (2010) Effects of physical positions on sleep architectures and post-nap functions among habitual nappers. Biological psychology, 83(3), 207-13. PMID: 20064578
Hello folks. Things are pretty busy over here and I might be having to review a lot of papers soon, so there's a possibility that entries here will get shorter and a bit more technical. But we'll...
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... Read more »
ANDREWS, J., BEN-SHACHAR, M., YEATMAN, J., FLOM, L., LUNA, B., & FELDMAN, H. (2009) Reading performance correlates with white-matter properties in preterm and term children. Developmental Medicine , 52(6). DOI: 10.1111/j.1469-8749.2009.03456.x
Rimrodt, S., Peterson, D., Denckla, M., Kaufmann, W., & Cutting, L. (2010) White matter microstructural differences linked to left perisylvian language network in children with dyslexia. Cortex, 46(6), 739-749. DOI: 10.1016/j.cortex.2009.07.008
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