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DTSTART;TZID=America/Los_Angeles:20170403T000000
DTEND;TZID=America/Los_Angeles:20170403T000000
DTSTAMP:20260510T080507
CREATED:20200922T220730Z
LAST-MODIFIED:20201013T005121Z
UID:4357-1491177600-1491177600@bec.ucla.edu
SUMMARY:Jeffrey Schank - The Evolution of Fairness
DESCRIPTION:Jeffrey Schank: UC DavisThere are many theoretical approaches to explaining fairness\, but explaining fairness without leverage (e.g.\, genetic relatedness\, punishment\, or retaliation) is especially challenging. The dictator game (DG) is a fairness game without leverage. One player\, the dictator\, is given a divisible quantity of some resource (typically money) and must decide how much to give a second player\, the recipient. The recipient has no counter strategy\, so the obvious rational solution to the DG is for the dictator to keep all of the resource and give none to the recipient. In experimental applications of the DG\, to control for possible forms of leverage (e.g.\, relatedness\, friendship\, etc.)\, anonymity is maintained between players. Nevertheless\, hundreds of experiments using the DG across cultures have shown that people\, on average\, share nearly 30% of a resource with an anonymous recipient. Theoretically\, this result has proven difficult to explain because of the lack of leverage. For example\, Hamilton’s rule\, which is standardly used to explain altruism and cooperation at the level of the individual\, does not formally apply. Using an agent-based model\, I show that fairness can evolve among agents that naively and anonymously play the DG. I also show that this framework can be extended to its close cousin the ultimatum game\, providing a better explanation of the available Empirical data than models that only rely on leverage.
URL:https://bec.ucla.edu/event/jeffrey-schank-the-evolution-of-fairness/
CATEGORIES:2017,Past Presentation,Presentation
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DTSTART;TZID=America/Los_Angeles:20170416T000000
DTEND;TZID=America/Los_Angeles:20170416T000000
DTSTAMP:20260510T080507
CREATED:20200922T220859Z
LAST-MODIFIED:20201013T005121Z
UID:4392-1492300800-1492300800@bec.ucla.edu
SUMMARY:Ketema Paul - The Ability to Recover from Sleep Loss is Regulated by Biological Clocks in Skeletal Muscle Tissue
DESCRIPTION:Ketema Paul: University of California\, Los AngelesSleep loss can severely impair cognitive performance\, yet the ability to recover from sleep loss is not well understood. Sleep regulatory mechanisms are assumed to lie exclusively within the brain mainly due to the strong behavioral manifestations of sleep. Whole-body disruptions of circadian biological clocks in mice are known to impair several aspects of sleep. Surprisingly\, we found that circadian-dependent sleep phenotypes were not rescued by restoring clock function in the brains of these mice. Instead\, we found that most of the impaired sleep phenotypes could be rescued by restoring circadian clock function exclusively in skeletal muscle. Additionally\, selective overexpression or knockout of core circadian gene Bmal1 in skeletal muscle had distinct and opposing effects on sleep traits. The most robust effects of Bmal1 manipulation in skeletal muscle tissue were on the ability to recover from sleep loss. Overall\, these results suggest that molecular mechanisms in the periphery in general\, and skeletal muscle tissue in particular\, have regulatory influences on sleep-wake mechanisms in the brain.
URL:https://bec.ucla.edu/event/ketema-paul-the-ability-to-recover-from-sleep-loss-is-regulated-by-biological-clocks-in-skeletal-muscle-tissue/
CATEGORIES:2017,Past Presentation,Presentation
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170424T000000
DTEND;TZID=America/Los_Angeles:20170424T000000
DTSTAMP:20260510T080507
CREATED:20200922T220906Z
LAST-MODIFIED:20201013T005121Z
UID:4397-1492992000-1492992000@bec.ucla.edu
SUMMARY:Chris Dunkel Schetter - Stress and Anxiety in Pregnancy: Consequences and Mechanisms for Birth and Beyond
DESCRIPTION:Chris Dunkel Schetter: University of California\, Los AngelesIn this talk\, Prof Dunkel Schetter will touch on conceptions of stress\, background on birth outcomes\, and summarize briefly findings on stress and preterm birth and low birthweight. She will present findings from her own program of work on pregnancy anxiety as a risk factor for preterm birth and the mechanisms in diverse ethnic\, racial and SES women. She will also note some developmental effects of prenatal stress and anxiety\, and briefly mention resilience to stress in pregnancy and intervention work.
URL:https://bec.ucla.edu/event/chris-dunkel-schetter-stress-and-anxiety-in-pregnancy-consequences-and-mechanisms-for-birth-and-beyond/
CATEGORIES:2017,Past Presentation,Presentation
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