Tag Archives: university of chicago

Mathematician Sees Artistic Side To Father of Computer

By Guest PostFebruary 23, 2012Science, Technologyalan turing, barry cooper, bletchley park, british cryptographic service, british mathematical colloquium, british prime minister, canterbury, classical art, classical recursion theory, computability theory, david, electronic computer, father, gerald sacks, gordon brown, homosexual, italian high renaissance, jan van leeuwen, john von neumann, mathematical logic, mathematical problems, mathematician, michelangelo, modern computer, potassium cyanide, princeton university, robert soare, sistine ceiling, statue, turing renaissance, united kingdom, united states, university of cambridge, university of chicago, university of kent, winston churchill, world war

This year a series of events around the world will celebrate the work of Alan Turing, the father of the modern computer, as the 100th anniversary of his birthday approaches on June 23. In a book chapter that will be published later this year, mathematician Robert Soare, the founding chairman of the University of Chicago’s computer science department, will propose that Turing’s achievement was artistic as well as scientific.

Soare, the Paul Snowden Russell Distinguished Service Professor in Mathematics and Computer Sciences, has played a leading role in computability theory — the field that Turing founded and which is devoted to determining how effectively complex mathematical problems can be solved. In Mathematical Logic in the 20th Century, Gerald Sacks ranked a paper Soare published in the Annals of Mathematics as one of the century’s 31 most important papers in mathematical logic, including computability theory. (more…)

Explosive Evolution Need Not Follow Mass Extinctions

By Guest PostFebruary 14, 2012Scienceadaptive radiation idea, canisius college, charles e mitchell, charlotte hsu, climate change, david w bapst, deforestation, diplograptines, ecological release hypothesis, ecosystem, evolutionary lag, explosive evolution, fossil record, graptoloid evolution, graptoloid history, graptoloids, h david sheets, life on earth, marine organisms, mass extinction, michael j melchin, neograptines, ordovician mass extinction, peter c bullock, physical traits, plankton, university at buffalo, university of chicago, zooplankton

In the wake of a mass extinction like the one that occurred 445 million years ago, a common assumption is that surviving species tend to proliferate quickly into new forms, having outlived many of their competitors.

But new research shows that tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became extinct. (more…)

North American Mammal Evolution Tracks with Climate Change

By Guest PostJanuary 1, 2012Environment, Nature, Science65 million years, anthropogenic climatic change, borja figueirido, brown university, changes in climate, christine janis, climate changes, deep sea microorganisms, diversity, early middle eocene fauna, early miocene epoch, evolutionary biologists, evolutionary faunas, fossil record, future climactic changes, global paleotemperatures, herbivores, history, immigration events, jack sepkoski, juan perez claros, levels of atmospheric oxygen, life on earth, mammal species, miocene fauna, natural history, North America, paleocene fauna, paleontologist, paul palmqvist, potential connection, quantitative analysis, rise and fall, savannah, six waves of species diversity, species migrations, university of chicago, vegetation, warming and cooling periods, waves, woodland

*Climate changes profoundly influenced the rise and fall of six distinct, successive waves of mammal species diversity in North America over the last 65 million years, shows a novel statistical analysis led by Brown University evolutionary biologists. Warming and cooling periods, in two cases confounded by species migrations, marked the transition from one dominant grouping to the next.*

PROVIDENCE, R.I. [Brown University] — History often seems to happen in waves — fashion and musical tastes turn over every decade and empires give way to new ones over centuries. A similar pattern characterizes the last 65 million years of natural history in North America, where a novel quantitative analysis has identified six distinct, consecutive waves of mammal species diversity or “evolutionary faunas.” What force of history determined the destiny of these groupings? The numbers say it was typically climate change.

“Although we’ve always known in a general way that mammals respond to climatic change over time, there has been controversy as to whether this can be demonstrated in a quantitative fashion,” said Christine Janis, professor of evolutionary biology at Brown University. “We show that the rise and fall of these faunas is indeed correlated with climatic change — the rise or fall of global paleotemperatures — and also influenced by other more local perturbations such as immigration events.” (more…)

Helping Your Fellow Rat: Rodents Show Empathy-Driven Behavior

By Guest PostDecember 9, 2011Scienceanimals, behavior, biological inheritance, chocolate, chocolate chips, emotional contagion, empathetic behavior, empathy driven helping behavior, empathy in rodents, evolutionary tree, homo sapiens, inbal ben ami bartal, jean decety, jeffrey mogil, laboratory rats, mcgill university, neuroscientists, peggy mason, phenomenon in humans, primates, pro social, rats, robert mitchum, rodents, special test, Technology, test arena, university of chicago, wild species

*Rats free trapped companions, even when given choice of chocolate instead*

The first evidence of empathy-driven helping behavior in rodents has been observed in laboratory rats that repeatedly free companions from a restraint, according to a new study by University of Chicago neuroscientists.

The observation, published today in Science, places the origin of pro-social helping behavior earlier in the evolutionary tree than previously thought. Though empathetic behavior has been observed anecdotally in non-human primates and other wild species, the concept had not previously been observed in rodents in a laboratory setting. (more…)

Black and White American Voters Live in One Country, But Two Different Worlds

By Guest PostOctober 31, 2011Culture, Politicsafrican american problems, african americans, aftermath of hurricane katrina, Barack Obama, black political effectiveness, change, euphoria, first black president, katrina disaster, michael dawson, new orleans hurricane in 2005, political outlook of blacks in america, racial harmony, the nadir of black politics, uchicago political scientist, united states, university of chicago, warfare in iraq and afghanistan, william harms

The political outlook of blacks in America has undergone dramatic swings in the last ten years — from the depths of powerlessness during the aftermath of Hurricane Katrina, to the zenith with the election of the first black president, Barack Obama.

Now, with another presidential election looming, blacks are again confronting new issues as they judge and sometimes question the impact of Obama’s election, contends UChicago political scientist Michael Dawson, whose work finds sharp contrasts between how African Americans and whites feel about their country. (more…)

New Research Links Common RNA Modification to Obesity

By Guest PostOctober 19, 2011Health, Scienceadenosine, anti obesity therapies, biochemical dynamic equilibrium, biological regulation, chemistry professor, Chicago, China, chuan he, deoxyribonucleic acid, dna in human cells, dna or rna methylation, England, epigenetics of dna, fto gene, genetic regulatory process, histones, human energy homeostasis, human rna modification, messenger rna metabolism, methyl group, methylation, n6 methyladenosine, nucleic acids, obesity, proteins, ribonucleic acid, rna epigenetics, rna modification, stephen orahilly, type ii diabetes, university of chicago

An international research team has discovered that a pervasive human RNA modification provides the physiological underpinning of the genetic regulatory process that contributes to obesity and type II diabetes.

European researchers showed in 2007 that the FTO gene was the major gene associated with obesity and type II diabetes, but the details of its physiological and cellular functioning remained unknown. (more…)

Americans Move Dramatically Toward Acceptance of Homosexuality, Survey Finds

By Guest PostSeptember 29, 2011Culturealways wrong, americans, civil liberties and freedom, complexity of american society, downtown chicago, gays and lesbians, general social survey, gss, homosexual behavior, homosexuality, national science foundation, norc at the university of chicago, public attitudes toward gays and lesbians, public attitudes toward homosexuality, same sex relations are, same-sex marriage, tom w smith, university campus, university of chicago, us census, washington d.c.

Although sharply divided, public attitudes toward gays and lesbians are rapidly changing to reflect greater acceptance, with younger generations leading the way, research by NORC at the University of Chicago shows.

In addition to a plurality who now approve of same-sex marriage, Americans overwhelmingly support basic civil liberties and freedom of expression for gays and lesbians, in contrast to sharp division on such issues in the 1970s. Taken together, the results show a clear “trend toward greater tolerance regarding homosexuality,” said Tom W. Smith, director of the General Social Survey at NORC and author of the NORC report, “Public Attitudes Toward Homosexuality.” (more…)

Smells May Help Birds Identify Their Relatives

By Guest PostSeptember 25, 2011Nature, Sciencebirds, brookfield zoo, bryan d neff, chicago zoological society, convergent evolution, heather coffin, humboldt penguins, hunter college, jason watters, jill mateo, mark e hauber, monogamous pairs, penguins, penguins at zoo, potential mate, preen gland, spheniscus humboldti, university of chicago, university of western ontario, zoo

Birds may have a more highly developed sense of smell than researchers previously thought, contend scholars who have found that penguins may use smell to determine if they are related to a potential mate.

The research by the University of Chicago and the Chicago Zoological Society, which manages Brookfield Zoo, shows how related birds are able to recognize each other. The study, published Wednesday, Sept. 21 in the article, “Odor-based Recognition of Familiar and Related Conspecifics: A First Test Conducted on Captive Humboldt Penguins (Spheniscus humboldti),” in the journal PLoS ONE, could help conservationists design programs to help preserve endangered species.

“Smell is likely the primary mechanism for kin recognition to avoid inbreeding within the colony,” said Heather Coffin, lead author of the paper. (more…)