Archive for the ‘Science’ Category

Chance to think again about the big questions

Wednesday, January 9th, 2008

One of the web sites you will see displayed along the right hand margin of Samadhisoft is The Edge. The edge is a place where some of the world’s best scientists and thinkers come to muse about things. If you call yourself an intellectual and you haven’t yet sampled The Edge, you’ve been missing out.

The Edge was setup by John Brockman who is the author of several books I’ve read and treasured immensely. Two of these are:

The Third Culture

The New Humanists

I can highly recommend John Brockman’s books and the web site, The Edge.

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It takes a lot to admit that you have changed your mind about something but dozens of leading scientists, scholars and intellectuals have done just that for a New York-based website that describes itself as an influential online salon for free thinkers.

This year’s annual question posed by www.edge.org asks visitors to the site to submit a short explanation to address the issue of what you have changed your mind about and why?

Previous questions on the site have been along the lines of, what is your most dangerous idea? And, what are you optimistic about?

“When thinking changes your mind, that’s philosophy. When God changes your mind, that’s faith. When facts change your mind, that’s science. And science is what’s on the minds of the world-class scientists and thinkers on Edge,” said John Brockman, the New York literary agent behind the website.

Steven Pinker, the Harvard psychologist and language expert, said he had changed his mind about whether humans were still evolving. He used to believe people had so isolated themselves from natural selection that evolution had stopped, but now he was not so sure.

“I’ve had to question the overall assumption that human evolution pretty much stopped at the time of the agricultural revolution,” Professor Pinker said.

“New studies suggest that thousands of genes have been subjected to strong natural selection over the past several thousand years, which means evolution is far from over for man.”

More… or

Excess Female To Male Births In Canada Linked To Chronic Dioxin Exposure

Thursday, October 25th, 2007

The release of zillions of chemicals, which have never existed in the natural world, into nature is bound to have negative effects.   All of us, no matter how remote a place we live in , have measurable levels of many of these chemicals in our systems now.  And it isn’t just frogs here and there born with an extra leg or two.   It’s us – we are being affected by our own folly.

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ScienceDaily (Oct. 23, 2007) — Almost 90 Canadian communities have experienced a shift in the normal 51:49 ratio of male to female births, so that more girls than boys are being born, according to two new studies.

James Argo, who headed the research, attributes this so-called “inverted sex ratio” of the residents in those communities to dioxin air pollutants from oil refineries, paper mills, metal smelters and other sources.

The studies analyzed information in the Environmental Quality Database (EQDB), an inventory of pollution sources, cancer data, and other factors developed for Canadian government research on how early exposure to environmental contaminants affects the health of Canadians.

Argo points out that the EQDB enables researchers to pinpoint the location of 126,000 homes relative to any of about 65 air pollution sources-types and the occurrence of cancer among residents of those homes.

Argo focused on air pollutants from those sources and the corresponding incidence of cancer among more than 20,000 residents and 5,000 controls. He identified inverted male sex ratios, sometimes as profound as 46:54 in almost all of the communities.

More…

Scientific Literacy and the Habit of Discourse

Monday, October 1st, 2007

– The First Prize Winner of the Second Annual Seed Science Writing Contest answers the question: What does it mean to be scientifically literate in the 21st Century

– This article seems very timely given what we were discussing yesterday here. To me, it’s all about how we work our way towards a more accurate picture of how existence works. And it’s also about the many pitfalls along the way.

– I’ve heard a number of good definitions of what science and/or the scientific method are. Martin, the author of this piece, offers yet another one that I really like:

Science works because its core dynamics—not its methods or techniques per se—are rooted in pitting intellects against one another. Science eventually yields impressive answers because it compels smart people to incessantly try to disprove the ideas generated by other smart people.

– Enjoy.

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Over the past few decades, growing evidence from cognitive science has revealed significant limits on the ability of individuals to criticize their own viewpoints. Even the most analytically gifted and experienced among us are susceptible to bias and self-deception to an extent that we (ironically enough) generally fail to appreciate. As psychologist Daniel Gilbert puts it in his book Stumbling on Happiness, “Each of us is trapped in a place, a time, and a circumstance, and our attempts to use our minds to transcend those boundaries are, more often than not, ineffective.” The reason science does manage to be astonishingly effective is not because large groups are automatically wiser or less prone to self-deception than individuals. History adequately demonstrates that, if anything, the opposite is more nearly the case. Science works because its core dynamics—not its methods or techniques per se—are rooted in pitting intellects against one another. Science eventually yields impressive answers because it compels smart people to incessantly try to disprove the ideas generated by other smart people.

The goal of science is to find those ideas that can withstand the long and hard barrage of evidence-based argument. That lesson must be experienced anew by the members of each generation, irrespective of their careers. Mastery of scientific concepts and theories is a necessary starting point, but it serves only as a prerequisite to joining the never-ending dialogue. Students must learn first-hand how to both imaginatively create new hypotheses and to dispassionately critique them. Many commentators have rightly implored us to make certain that young people encounter the “thrill” of discovery. While this is undeniably desirable, it is arguably even more crucial that they experience the agony (if only on a modest scale) of having a pet hypothesis demolished by facts.

More…

Brains of liberals, conservatives may work differently, study finds

Wednesday, September 12th, 2007

By Chicago Tribune and Los Angeles Times

CHICAGO — The differences between liberals and conservatives may run deeper than how they feel about welfare reform or the progress of the Iraq war: Researchers reported Sunday that their brains may actually work differently.

Oh yeah…I think we knew this…

In a study likely to raise the hackles of some conservatives, scientists at New York University and the University of California, Los Angeles, found that a specific region of the brain’s cortex is more sensitive in people who consider themselves liberals than in self-declared conservatives.

The brain region in question helps people shift gears when their usual response would be inappropriate, supporting the notion that liberals are more flexible in their thinking.

“Say you drive home from work the same way every day, but one day there’s a detour and you need to override your autopilot,” said NYU psychologist David Amodio. “Most people function just fine. But there’s a little variability in how sensitive people are to the cue that they need to change their current course.”

The work, to be reported today in the journal Nature Neuroscience, grew out of decades of previous research suggesting that political orientation is linked to certain personality traits or styles of thinking. A review of that research published in 2003 found that conservatives tend to be more rigid and closed-minded, less tolerant of ambiguity and less open to new experiences. Some of the traits associated with conservatives in that review were decidedly unflattering, including fear, aggression and tolerance of inequality. That evoked outrage from conservative pundits.

The latest study showed “there are two cognitive styles — a liberal style and a conservative style,” said UCLA neurologist Dr. Marco Iacoboni, who was not connected with the latest research.

Linda Skitka, a professor of psychology at the University of Illinois at Chicago, said it’s possible the liberals in the recent study appeared more flexible than the conservatives because the population was skewed.

“We’re more likely to find extreme conservatives in the U.S. than extreme liberals,” she said.

More…

Research thanks to: Van

Tiny Brain No Problem for French Tax Official

Monday, July 23rd, 2007

– For those who worry about the competence of their tax officials, here’s a story to put your minds at rest:

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From Spiegel On-Line International:

Something that many people secretly believed has been confirmed: You don’t actually need a brain to work in a tax office. A French civil servant has been found to have a huge cavity filled with fluid in his head — yet lives a completely normal life.

The commonly spouted wisdom that people only use 10 percent of their brain power may have been dismissed as a myth, but one French man seems to be managing fine with just a small fraction of his actual brain.

In fact the man, who works as a civil servant in southern France, has succeeded in living an entirely normal life despite a huge fluid-filled cavity taking up most of the space where his brain should be.

Neurologists at the University of Marseille described the incredible case in the latest edition of the medical journal Lancet published Friday.

They describe how the 44-year-old man went to the hospital in 2003 because he felt a mild weakness in his left leg. When the doctors went to look at his brain to see if the problem lay there, they found, well, pretty much nothing but a great black hole.

The man told the hospital that as a child he had suffered from hydrocephalus (also known as “water on the brain”), a condition in which an abnormal ammount of cerebrospinal fluid accumulates in the brain cavities, causing pressure inside the skull. To treat the condition, a valve known as a “shunt” had been inserted in his head to drain away the fluid when he was a six-month old baby. It was removed when he was 14.

This information prompted the doctors to give him a computed tomography scan (CT) and a magnetic resonance imaging scan (MRI). They then saw that there was what they — somewhat euphemistically — called a “massive enlargement” of the lateral ventricles, chambers that hold the fluid which cushions and protects the brain and which are usually tiny.

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More…

And the same story as ScienceDaily reported it…

Ten Politically Incorrect Truths About Human Nature

Saturday, July 14th, 2007

– I really eat this stuff up. The more it surprises us and the more counter intuitive it seems, the more we need to own it, I think.

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Why most suicide bombers are Muslim, beautiful people have more daughters, humans are naturally polygamous, sexual harassment isn’t sexist, and blonds are more attractive.

On to the article, enjoy!

It’s not the sun, folks

Thursday, July 12th, 2007

– One of the recent favorite hobby horses of the folks who oppose the idea that mankind’s activities are causing global climate change has been the notion that variations in the sun’s output are behind the changes we are seeing. They come up with an alternative like this periodically and run with it until the accumulated evidence undermines it too badly to continue. Then they switch to another and run off in a different direction.

– Here’s an academic paper from the Proceedings of The Royal Society which states clearly that if anything, the sun’s influence in recent years should have cooled the climate. Next hobby horse, anyone?

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Recent oppositely directed trends in solar climate forcings and the global mean surface air temperature

Abstract:

There is considerable evidence for solar influence on the Earth’s pre-industrial climate and the Sun may well have been a factor in post-industrial climate change in the first half of the last century. Here we show that over the past 20 years, all the trends in the Sun that could have had an influence on the Earth’s climate have been in the opposite direction to that required to explain the observed rise in global mean temperatures.

To the main paper:

DIRTY LITTLE SECRET

Wednesday, July 11th, 2007

– I’ve got a friend who has strong doubts about the gathering scientific consensus around Global Climate Change. We’ve debated the issue to a stand-still and decided to let it sit since we agree on so many other aspects of the Perfect Storm Hypothesis.

– But, I’ve heard many of his concerns loud and clear about the reliability of the science behind the ‘consensus’ on Global Climate Change – so it gives me the creeps to publish this little piece. It’s like putting a sharp knife in his hand. And, frankly, what the article has to say is worrisome.

– But, having said that, this article and others like it should become the impetus to make science and the scientific process better rather than the revelations that tear it down. because, after all, science is the best tool we have in the box – bar none.

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Are most published research findings actually false? The case for reform.

In a 2005 article in the Journal of the American Medical Association, epidemiologist John Ioannidis showed that among the 45 most highly cited clinical research findings of the past 15 years, 99 percent of molecular research had subsequently been refuted. Epidemiology findings had been contradicted in four-fifths of the cases he looked at, and the usually robust outcomes of clinical trials had a refutation rate of one in four.

The revelations struck a chord with the scientific community at large: A recent essay by Ioannidis simply entitled “Why most published research findings are false” has been downloaded more than 100,000 times; the Boston Globe called it “an instant cult classic.” Now in a Möbius-strip-like twist, there is a growing body of research that is investigating, analyzing, and suggesting causes and solutions for faulty research.

Two papers published this spring in the open-access journal PLoS Medicine by Benjamin Djulbegovic from the University of South Florida and Ramal Moonesinghe from the CDC have delved into the issues raised by Ioannidis and suggested possible ways to mitigate this apparent failure of scientific enterprise. One of the suggestions is to ensure that experimental results are independently replicable. “More often than not, genuine replication is not done, and what we end up with in the literature is corroboration or indirect supporting evidence,” says Moonesinghe.

More…

How do we know we’re not wrong?

Wednesday, July 4th, 2007

– Big thanks to Michael Tobias over at Only in it for the Gold for posting this link.

As he says, “All sincere doubters ought to consider Naomi Oreskes’ excellent overview of the state of knowledge about anthropogenic climate change in specific, and about how we collectively come to know anything about anything in general.

– Bravo, Michael and very big bravo, Naomi!

Environmental Performance Index

Monday, June 4th, 2007

– Well you might ask what an Environmental Performance Index is?

– It’s a report created by the Yale Center for Environmental Law & Policy and the Center for International Earth Science Information Network (CIESIN) at Columbia University.

It’s a massive document. The part I like the best is the Summary for Policymakers Brochure ➡ which boils its findings down.

Here’s the Executive Summary to give you the flavor:

By identifying specific targets for environmental performance and measuring how close each country comes to these established goals, the Pilot 2006 Environmental Performance Index (EPI) provides benchmarks for current national pollution control and natural resource management results. The issue-by-issue and aggregate rankings facilitate cross-country comparisons both globally and within relevant peer groups. The EPI thus provides a powerful tool for improving policymaking and shifting environmental decisionmaking onto firmer analytic foundations.

The EPI centers on two broad environmental protection objectives: 1) reducing environmental stresses on human health and 2) protecting ecosystem vitality. Derived from a careful review of the environmental literature, these twin goals mirror the priorities expressed by policymakers, most notably the environmental dimension of the United Nations’ Millennium Development Goals. Environmental health and ecosystem vitality are gauged using sixteen indicators tracked in six established policy categories: Environmental Health, Air Quality, Water Resources, Biodiversity and Habitat, Productive Natural Resources, and Sustainable Energy.Here’s a link to the entire document in PDF form:

– A side note here. This report ranks New Zealand #1 in the world in its overall Envoronmental Performance Index score. That relates back to what I was saying here about New Zealand as a destination: &

– Thx Brian C. for the tip about this report!