The southern elephant seal, Mirounga leonina, is a textbook example of an extremely polygynous mammal. As the breeding season begins dominant males fight for control of dozens to hundreds of females on his section of beach real estate (Figure 1). Females within the harem, are monopolized by the dominant male (called a beach master). The beach master is believed to father the vast majority of offspring from his harem females. This system evolved because terrestrial birthing sites (beaches........ Read more »
de Bruyn, P., Tosh, C., Bester, M., Cameron, E., McIntyre, T., & Wilkinson, I. (2011) Sex at sea: alternative mating system in an extremely polygynous mammal. Animal Behaviour, 82(3), 445-451. DOI: 10.1016/j.anbehav.2011.06.006
If modern London was ancient Athens, London taxi drivers would be worshipped as the Gods of Navigation, appeased only by offerings of fluffy dice and pine-scented air fresheners. Because, before being able to drive one of the legendary black cabs, a wannabe taxi driver must pass a gruelling trial known as ‘The Knowledge’. This consists [...]... Read more »
Maguire, E. (2000) Navigation-related structural change in the hippocampi of taxi drivers. Proceedings of the National Academy of Sciences, 97(8), 4398-4403. DOI: 10.1073/pnas.070039597
Maguire, E., Spiers, H., Good, C., Hartley, T., Frackowiak, R., & Burgess, N. (2003) Navigation expertise and the human hippocampus: A structural brain imaging analysis. Hippocampus, 13(2), 250-259. DOI: 10.1002/hipo.10087
Woollett, K., & Maguire, E. (2010) The effect of navigational expertise on wayfinding in new environments. Journal of Environmental Psychology, 30(4), 565-573. DOI: 10.1016/j.jenvp.2010.03.003
Early intervention for language difficulties seems a good idea, but a recent randomised controlled trial shows the problem: many late-talking toddlers improve spontaneously... Read more »
Wake M, Tobin S, Girolametto L, Ukoumunne OC, Gold L, Levickis P, Sheehan J, Goldfeld S, & Reilly S. (2011) Outcomes of population based language promotion for slow to talk toddlers at ages 2 and 3 years: Let's Learn Language cluster randomised controlled trial. BMJ (Clinical research ed.). PMID: 21852344
The nuances of the economy are nothing compared with the nuances throughout biology, yet we don’t see our scientists screaming at each other on TV (instead we see researchers versus Jenny McCarthy…ugh!). Researchers take their arguments and evidence to respectable journals and state the facts, which aren’t always in black and white. Today’s stunning image is from a paper that clarifies how actin can prevent AND promote secretion.
Cells use regulated secretion to release certain materi........ Read more »
Nightingale, T., White, I., Doyle, E., Turmaine, M., Harrison-Lavoie, K., Webb, K., Cramer, L., & Cutler, D. (2011) Actomyosin II contractility expels von Willebrand factor from Weibel-Palade bodies during exocytosis. originally published in The Journal of Cell Biology, 194(4), 613-629. DOI: 10.1083/jcb.201011119
All EMS RSI patients had waveform capnography, which may explain why the results are so different from the results of the study by Davis on EMS RSI for TBI. This study raised a bunch of questions about those results, which showed worse outcomes for EMS RSI. One hypothesis was that the much higher incidence of hypocapnea contributed to the bad outcomes even though the EMS intubation success rates more than doubled for TBI patients. ... Read more »
Bernard SA, Nguyen V, Cameron P, Masci K, Fitzgerald M, Cooper DJ, Walker T, Std BP, Myles P, Murray L.... (2010) Prehospital rapid sequence intubation improves functional outcome for patients with severe traumatic brain injury: a randomized controlled trial. Annals of surgery, 252(6), 959-65. PMID: 21107105
In my previous post I have presented the ‘tentative’ reading of the Calatagan pot inscription by Guillermo and Paluga . In this post, I write the authors’ test that made them endorse their reading.
The authors think that the reading should be tested by the following: 1) lexical coherence and simplicty; 2) historical emplotment; and 3) sociological mapping or embeddedness.... Read more »
Guillermo, R., & Paluga, M. (2011) Barang king banga: A Visayan language reading of the Calatagan pot inscription (CPI). Journal of Southeast Asian Studies, 42(01), 121-159. DOI: 10.1017/S0022463410000561
Every now and again during interview coaching, I will stop and ask the client, “What do you think I’m looking for with that question?”. Having read an article by some organisational psychologists at the University of Zurich (Kleinmann et al., 2011), I’m going to ask that question a lot more. In various studies these researchers [...]... Read more »
Kleinmann, M., Ingold, P., Lievens, F., Jansen, A., Melchers, K., & Konig, C. (2011) A different look at why selection procedures work: The role of candidates' ability to identify criteria. Organizational Psychology Review, 1(2), 128-146. DOI: 10.1177/2041386610387000
Do men and women differ in their cognitive capacities? It's been a popular topic of conversation since as far back as we have records of what people were talking about.While it's now (almost) generally accepted that men and women are at most only very slightly different in average IQ, there are still a couple of lines of evidence in favor of a gender difference.First, there's the idea that men are more variable in their intelligence, so there are more very smart men, and also more very stupid on........ Read more »
Hoffman M, Gneezy U, & List JA. (2011) Nurture affects gender differences in spatial abilities. Proceedings of the National Academy of Sciences of the United States of America. PMID: 21876159
There is a piece of wisdom, an ‘is’ can not make an ‘ought’. But also the opposite is true, an ‘ought’ can not make an ‘is’. Just because we feel we ought to have a rational moral sense, does not mean we do have. Just because utilitarianism (least total harm/greatest total benefit) is considered by [...]... Read more »
Bartels, D., & Pizarro, D. (2011) The mismeasure of morals: Antisocial personality traits predict utilitarian responses to moral dilemmas. Cognition, 121(1), 154-161. DOI: 10.1016/j.cognition.2011.05.010
report of Manisha Gupta seminar at UGA... Read more »
Gupta, M., Goldsmith, C., Metcalfe, M., Spipopoulou, C., & Rollin, P. (2010) Reduced virus replication, proinflammatory cytokine production, and delayed macrophage cell death in human PBMCs infected with the newly discovered Bundibugyo ebolavirus relative to Zaire ebolavirus. Virology, 402(1), 203-208. DOI: 10.1016/j.virol.2010.03.024
If you happen to be a fossil cat, there are two main routes to get media attention. The first – be Smilodon. The celebrated sabercat is a media darling, and any major study about how this felid fed has a good chance of getting some play in the news.
Not every fossil cat had such formidable [...]... Read more »
ANTON, M., GALOBART, A., & TURNER, A. (2005) Co-existence of scimitar-toothed cats, lions and hominins in the European Pleistocene. Implications of the post-cranial anatomy of (Owen) for comparative palaeoecology. Quaternary Science Reviews, 24(10-11), 1287-1301. DOI: 10.1016/j.quascirev.2004.09.008
Hemmer, H., Kahlke, R., & Vekua, A. (2011) The cheetah Acinonyx pardinensis (Croizet et Jobert, 1828) s.l. at the hominin site of Dmanisi (Georgia) – A potential prime meat supplier in Early Pleistocene ecosystems. Quaternary Science Reviews, 30(19-20), 2703-2714. DOI: 10.1016/j.quascirev.2011.05.024
Lewis, M., Werdelin, L. (2010) Carnivoran Dispersal Out of Africa During the Early Pleistocene: Relevance for Hominins?. Out of Africa I: The First Hominin Colonization of Eurasia, Vertebrate Paleobiology and Paleoanthropology, 13-26. DOI: 10.1007/978-90-481-9036-2_2
Dietary fat activates the cholinergic antiinflammatory pathways and inhibits macrophage activation.... Read more »
Luyer MD, Greve JW, Hadfoune M, Jacobs JA, Dejong CH, & Buurman WA. (2005) Nutritional stimulation of cholecystokinin receptors inhibits inflammation via the vagus nerve. The Journal of experimental medicine, 202(8), 1023-9. PMID: 16216887
Discussion of the background that led to the sequencing of the genome of the green anole, Anolis carolinensis.... Read more »
Alföldi, J., Di Palma, F., Grabherr, M., Williams, C., Kong, L., Mauceli, E., Russell, P., Lowe, C., Glor, R., Jaffe, J.... (2011) The genome of the green anole lizard and a comparative analysis with birds and mammals. Nature, 477(7366), 587-591. DOI: 10.1038/nature10390
Two views of an Acheulian handaxe adorn the cover of this week's Nature (right). Always happy to see paleoanthropology stuff be classy, front-page news. The cover highlights Christopher Lepre's and colleagues' announcement of what may be the oldest Acheulian tools known.
To recap stone tools: The first good evidence of tool use by humans' ancestors are the Oldowan lithics from the 2.6 million year old site of Gona in Ethiopia (Semaw et al. 2003). McPherron and others (2010) reported 2 possibly-c........ Read more »
Ferring, R., Oms, O., Agusti, J., Berna, F., Nioradze, M., Shelia, T., Tappen, M., Vekua, A., Zhvania, D., & Lordkipanidze, D. (2011) From the Cover: Earliest human occupations at Dmanisi (Georgian Caucasus) dated to 1.85-1.78 Ma. Proceedings of the National Academy of Sciences, 108(26), 10432-10436. DOI: 10.1073/pnas.1106638108
Kimura, Y. (2002) Examining time trends in the Oldowan technology at Beds I and II, Olduvai Gorge. Journal of Human Evolution, 43(3), 291-321. DOI: 10.1006/jhev.2002.0576
Lepre, C., Roche, H., Kent, D., Harmand, S., Quinn, R., Brugal, J., Texier, P., Lenoble, A., & Feibel, C. (2011) An earlier origin for the Acheulian. Nature, 477(7362), 82-85. DOI: 10.1038/nature10372
McPherron, S., Alemseged, Z., Marean, C., Wynn, J., Reed, D., Geraads, D., Bobe, R., & Béarat, H. (2010) Evidence for stone-tool-assisted consumption of animal tissues before 3.39 million years ago at Dikika, Ethiopia. Nature, 466(7308), 857-860. DOI: 10.1038/nature09248
Mgeladze, A., Lordkipanidze, D., Moncel, M., Despriee, J., Chagelishvili, R., Nioradze, M., & Nioradze, G. (2011) Hominin occupations at the Dmanisi site, Georgia, Southern Caucasus: Raw materials and technical behaviours of Europe’s first hominins. Journal of Human Evolution, 60(5), 571-596. DOI: 10.1016/j.jhevol.2010.10.008
Rightmire, G., Lordkipanidze, D., & Vekua, A. (2006) Anatomical descriptions, comparative studies and evolutionary significance of the hominin skulls from Dmanisi, Republic of Georgia. Journal of Human Evolution, 50(2), 115-141. DOI: 10.1016/j.jhevol.2005.07.009
Semaw, S., Rogers, M., Quade, J., Renne, P., Butler, R., Dominguez-Rodrigo, M., Stout, D., Hart, W., Pickering, T., & Simpson, S. (2003) 2.6-Million-year-old stone tools and associated bones from OGS-6 and OGS-7, Gona, Afar, Ethiopia. Journal of Human Evolution, 45(2), 169-177. DOI: 10.1016/S0047-2484(03)00093-9
When I say that prions are one of the coolest biological phenomena in existence, I mean to say that they are one of the most sci-fi and potentially frightening things you could encounter. They are the causative agent behind mad cow disease, which you’ve probably heard of, and which might not seem too terrifying. But the way prions work, and the fact that there is a “human form” of mad cow disease, will be enough to give you the creeps.
Did I mention that prion infection is t........ Read more »
Trevitt CR, & Singh PN. (2003) Variant Creutzfeldt-Jakob disease: pathology, epidemiology, and public health implications. The American journal of clinical nutrition, 78(3 Suppl). PMID: 12936961
Edgeworth JA, Gros N, Alden J, Joiner S, Wadsworth JD, Linehan J, Brandner S, Jackson GS, Weissmann C, & Collinge J. (2010) Spontaneous generation of mammalian prions. Proceedings of the National Academy of Sciences of the United States of America, 107(32), 14402-6. PMID: 20660771
We're waging an increasingly desperate war on drug-resistant bacteria. Thanks to their adaptability--and our own fondness for strewing antibiotics everywhere, like inept military commanders who let the enemy borrow and examine our only weapons before we attack--the bugs are gaining ground. Previously life-saving drugs are now useless, and previously beatable infections now have strains that seem immortal.To find new antibiotics that can help us, why not turn to animals that are still doing a goo........ Read more »
Wang, J., Wong, E., Whitley, J., Li, J., Stringer, J., Short, K., Renfree, M., Belov, K., & Cocks, B. (2011) Ancient Antimicrobial Peptides Kill Antibiotic-Resistant Pathogens: Australian Mammals Provide New Options. PLoS ONE, 6(8). DOI: 10.1371/journal.pone.0024030
by Vincent Racaniello in virology blog
This article was written for extra credit by a student in my virology course. by Bethany DiPrete Human papillomavirus (HPV) infection is the most common sexually transmitted disease in the United States, and as of yet, there is no cure. However, there is a vaccine to prevent infection by certain strains. Recent research may encourage not [...]... Read more »
Hocking JS, Stein A, Conway EL, Regan D, Grulich A, Law M, & Brotherton JM. (2011) Head and neck cancer in Australia between 1982 and 2005 show increasing incidence of potentially HPV-associated oropharyngeal cancers. British journal of cancer, 104(5), 886-91. PMID: 21285981
Between 800 and 200 BCE, a remarkable series of sages, mystics, and thinkers gave rise to the transcendental traditions that are known today as “world religions.” In 1949, the German philosopher Karl Jaspers identified several themes common to these traditions and described this six hundred year period as the Axial Age: “These movements were ‘axial’ [...]... Read more »
Jacobsen, Thorkild. (1963) Ancient Mesopotamian Religion: The Central Concerns. Proceedings of the American Philosophical Society, 107(6), 473-484. info:/
by Bruce Lieberman in Beaker
Dr. Stuart Lipton and collaborators reprogram human skin cells directly into functioning neurons—a first step in re-creating personalized models of Alzheimer’s disease and other neurological disorders.... Read more »
Ambasudhan R, Talantova M, Coleman R, Yuan X, Zhu S, Lipton SA, & Ding S. (2011) Direct Reprogramming of Adult Human Fibroblasts to Functional Neurons under Defined Conditions. Cell stem cell, 9(2), 113-8. PMID: 21802386
Today I present you only one chapter of a great book by Wu and Blackhurst: “Managing Supply Chain Risk and Vulnerability” (which can be bought on amazon.com here).
I especially like the third chapter by Professors Sodhi and Tang on a new approach to managing disruptions: Time-based Risk Management.
The whole book features a more practitioner oriented approach so don’t expect too much focus on the methodological parts.
Reason for risk management
Supply chain disrupti........ Read more »
Sodhi, M.S., & Tang, C.S. (2009) Managing Supply Chain Disruptions via Time-Based Risk Management. Managing Supply Chain Risk and Vulnerability: Tools and Methods for Supply Chain Decision Makers., 29-40. info:/
Do you write about peer-reviewed research in your blog? Use ResearchBlogging.org to make it easy for your readers — and others from around the world — to find your serious posts about academic research.
If you don't have a blog, you can still use our site to learn about fascinating developments in cutting-edge research from around the world.
Research Blogging is powered by SMG Technology.
To learn more, visit seedmediagroup.com.