Science
drorzel | May 13, 2009An example problem from today's lecture:
A sleep-deprived parent is warming a bottle for a midnight feeding. He places a bottle containing 250 ml of infant formula at 275K into 300 ml of water at 320 K. When the two liquids reach equilibrium, what is the temperature of the formula?
Answer: Trick question! While the bottle is warming, he dozes off holding the baby, and by the time they wake up, both bottle and water have cooled to only 288K.
ddobbs | May 12, 2009Most of us recognize the power of the urge to conform , but you don't often see it evoked and displayed so starkly as in this old Candid Camera segment. The CC crew seeds an elevator with several crew members who do odd things like face the rear of the elevator car. See how long the naive bystanders who join them hold out against the pressure.
-- Whu-oh: This is where missing video was --
update: Posted here was a wonderful segment as described above. I had found it via Google Video. It was up about 3 hours when I got an email from someone claiming to be from Candid Camera, Inc., asking me…
denialism | May 12, 2009In response to the conversation on "Obesity, Evolution and Delayed Gratification" on the main page and Razib's coverage of a fascinating new study on the relationship to the lactase gene and obesity, I thought now would be a good time to write about an important new study that helps define the boundaries of what normal and healthy weights are in humans.
This study, entitled Body-mass index and cause-specific mortality in 900 000 adults: collaborative analyses of 57 prospective studies is a whopper of a meta-analysis. That is, a study that increases the power of other similar studies by…
denialism | May 12, 2009I was pleased to see president Obama deliver this address yesterday:
Click To Play
I was even more pleased because he has gathered the traditional opponents of healthcare reform around him and has convinced them to commit to reform in the US system. This is a positive sign. However, I'm concerned because, as with all political debates that challenge a dominant ideology - in this case free-market fundamentalism - we will soon see the denialists come out of the woodwork to disparage any attempt at achieving reforms that may result in universal health care coverage. This has, in fact,…
bioephemera | May 11, 2009This week, Nieman Journalism Lab is running a fascinating series of video interviews with the New York Times' R&D group on the possible future face of news media. I know - you're wondering why the supposedly financially moribund NYT is wasting money on nerds who play with Kindles. Who do they think they are, Google? But it might be a good strategy after all.
As Fortune and the Columbia Journalism Review recently pointed out, with outlets all around them slashing premium content (like science), the NYT's best strategy may be to instead become increasingly "elite:"
Meanwhile, the company is…
evolvingthoughts | May 11, 2009It is often the case that when non-academics, or even non-humanities academics, talk about my generic field, they refer to it as "arts", and mean by this the creative arts, like performing arts, crafts, and corporate accounting. So they justify the funding for the "arts" (or "the yartz", as a Barry Humpries character calls them) because we are supposed to entertain people and add to cultural life.
Those who know me know this is not what I do. I have been known to sing in the shower, but that is about it. So I was very pleased to see this piece in the Australian Higher Education section…
awild | May 11, 2009
A bold paper by Rob Dunn et al in Ecology Letters is making news this month.  Dunn and an impressive list of coauthors pool observations of ant species richness from more than 1000 sites worldwide, finding that southern hemisphere habitats consistently support more species than their equivalents in the northern hemisphere. The pattern appears to be predicted primarily, but not entirely, by climate.
These results strike me as intuitively correct, and I suspect anyone who has collected ants in both hemispheres will agree. Brazil's fauna is spectacularly rich. That of Oklahoma, less so…
bioephemera | May 11, 2009Over at his Discover blog, Carl Zimmer has asked readers to help choose a cover for his new non-majors evolution textbook. If you have a good eye for design, as I'm sure many BioE readers do, go over and help him pick the most appealing cover!
It's a hard choice, as so many design choices are. I'll leave my vote until after the fold so I don't prejudice you.
Okay; so I like all of them, but don't *love* any of them. My problem with the orchid, which I think is the most elegant and subtle design, is that it doesn't say "evolution" to me. It says "botany." Then it says "yawn." The minute I…
oracknows | May 11, 2009Remember about a week ago, when I lamented how scientific publisher Elsevier had created a fake journal for Merck that reprinted content from other Elsevier journals favorable to Merck products in a format that looked every bit like a peer-reviewed journal but without any disclaimers to let the unwary know that it wasn't a peer-reviewed journal?
Whoops, Elsevier did it again. Six times:
Scientific publishing giant Elsevier put out a total of six publications between 2000 and 2005 that were sponsored by unnamed pharmaceutical companies and looked like peer reviewed medical journals, but did…
drorzel | May 11, 2009A former student asks about water contamination:
My mother went and had
our water tested and discovered that we have high uranium and radon
levels. Radon is not a big deal, its a gas, and as I have read you would
need to take a shower for somewhere around 4 hours to suffer damage from
it. The Uranium is a different story. They are no government set minimums
set for Uranium, what is an appropriate amount of radiation for a year?
Also wouldn't Uranium pass through our bodies before it decayed? Also how
would I calculate how much Uranium would be dangerous, in a how many parts
per water?
I…
drorzel | May 11, 2009Everybody I know who has back problems swears up and down that sleeping on a really firm mattress is key. My father used to have a big plywood board under his side of the mattress, so that his side of the bed would be less soft (I think they have since bought a new mattress that is uniformly hard).
So, why is it that every time I sleep on a mattress that's firmer than the one we have here, my lower back locks up so badly that it's an hour before I can walk comfortably? And when I get back to our relatively soft bed, my back feels fine in the morning?
I suppose this could be some sort of grand…
oracknows | May 10, 2009Regular readers here know that I really hate to see stories like the one I'm about to discuss, specifically that of 13-year-old Daniel Hauser, a boy with Hodgkin's lymphoma who is refusing chemotherapy based on religion and his preference for "alternative" therapy, whose parents are also supporting his decision.
Since I'm a bit behind on this story, its having percolated through the blogosphere for the last three or four days, let me start with a bit of context. If there is one theme that I've emphasized time and time again here, it's science- and evidence-based medicine. That means…
grrlscientist | May 10, 2009tags: Birdbooker Report, bird books, animal books, natural history books, ecology books
"How does one distinguish a truly civilized nation from an aggregation of
barbarians? That is easy. A civilized country produces much good bird
literature."
--Edgar Kincaid
The Birdbooker Report is a special weekly report of a wide variety of science, nature and behavior books that currently are, or soon will be available for purchase. This report is written by one of my Seattle birding pals and book collector, Ian "Birdbooker" Paulsen, and is edited by me and published here for your information and…
pharyngula | May 9, 2009
I've been doing it wrong. I was looking over creationist responses to my arguments that Haeckel's embryos are being misused by the ID cretins, and I realized something: they don't give a damn about Haeckel. They don't know a thing about the history of embryology. They are utterly ignorant of modern developmental biology. Let me reduce it down for you, showing you the logic of science and creationism in the order they developed.
Here's how the scientific and creationist thought about the embryological evidence evolves:
Scientific thinking
An observation: vertebrate embryos show striking…
thusspakezuska | May 8, 2009The most excellent Dr. Isis has launched her most excellent Letters to Our Daughters project. Isis tells us
The inspiration for my Letters to Our Daughters Project comes from my hope that we can recreate our family tree here, creating a forum where the mothers and aunts in our fields (which I hope to not limit to physiology, but that's where I'll start because that's who I know) can share their wisdom with us. I think there is a wealth of information among these successful women and I hope to use this forum to share it with young scientists who are yearning for that knowledge.
Today, Isis…
drorzel | May 8, 2009It's a nice demonstration of the oddity of the blogosphere that a libertarian political blog has become my go-to-source for thoughtful blogging about physics education. Thoreau had two good posts yesterday at Unqualified Offerings, one on the problems created by breaking down incorrect intuition, and another on the lack of calculus in calculus-based physics texts:
The ostensibly calculus-based introductory physics book by Knight is not really a calculus-based book. Sure, integrals and derivatives pop up here and there, but the vast majority of the problems can be solved without them, and…
drorzel | May 8, 2009Via Michael Nielsen, a page documenting what I really hope is the dorkiest family vacation ever: Project GREAT: General Relativity Einstein/Essen Anniversary Test Clocks, Kids, and General Relativity on Mt Rainier:
In September 2005 (for the 50th anniversary of the atomic clock and 100th anniversary of the theory of relativity) we took several cesium clocks on a road trip to Mt Rainier; a family science experiment unlike anything you've seen before.
By keeping the clocks at altitude for a weekend we were able to detect and measure the effects of relativistic time dilation compared to atomic…
drorzel | May 8, 2009We had a colloquium yesterday from Ted von Hippel of Siena College, over on Route 9, about "White Dwarf Debris Disks and the Fate of Planetary Systems." The abstract was:
After a brief introduction to white dwarfs and debris disks, I will present observations from the Spitzer Space Telescope and ground-based telescopes of metal-polluted white dwarfs with circumstellar debris disks. We measure the constituents of the debris disks, the elemental abundances of the material being accreted, and the accretion timescale. Our measurements support the idea that disruptions of asteroids created these…