RSS
 

Archive for August, 2010

A toothpaste-like gel that can heal wounds six times faster than normal [Medical Breakthroughs]

13 Aug
A gene therapy in the form of a thick gel is about to revolutionize wound treatment. The gel is called Nexagon, and when you apply it to a wound, it reprograms the cells to heal more quickly and efficiently. More »
 
 

Seafood: What is Safe to Eat and What is Not

13 Aug




















Real Simple consulted a marine scientist who works for a non-profit regarding seafood safety and I use this often when meal planning. To read more details on the matter and to print out a pocket-size guide, click here. Very enlightening!
 
 

Opinions vs. Data

13 Aug

Gmail’s recent update brought us a strange new UI element:1

Checkbox Popup

Clicking on the checkbox selects all emails. The arrow, on the other hand, allows you to make more specific selections:

Opened Checkbox Popup

This is a pretty unusual UI element. Gmail may be the only application using anything like it. This has caused a lot of people to question its usability. Gmail lead UI designer Michael Leggett eventually chimed in, writing:

[The new widget] is odd. And yet, both the checkbox and the menu part tested very well in the lab. The people who hated the widget outside the lab also understood how to use it but promised others wouldn’t because it was so «weird.» There were some optimizations I wanted that didn’t make it in (highlight the current selection state in the menu, show keyboard shortcuts, etc). But it tested fine without those things.

What Leggett described is exactly how I felt about the widget when I first saw it. I immediately figured out how to use it, but my gut reaction was «most people are not going to get how this works.» It seems I was wrong. This is one of the reasons why I don’t put too much trust into opinion-based usability reviews: There’s a lot of guesswork involved, and guessing how humans behave is an endeavor fraught with peril.2 Expert reviews can be helpful, but they are no substitute for actual testing.

Jakob Nielsen has written about this:

In my two examples, the probability of making the right design decision was vastly improved when given the tiniest amount of empirical data.

If there’s one thing we should all take to heart, it’s that humans are strange: They rarely behave the way we expect (or want) them to. Testing often reveals issues we would never have found out by merely thinking about a design. Conversely, something that looks wrong might actually work perfectly well.


  1. It’s to the left of the «Archive» button in Gmail’s new UI, if you want to see it in context. back

  2. This is not to say that you should keep a UI element if people are able to use it, but consistently dislike it. The point is merely that you should not discard anything based on an untested assumption that people won’t be able to use it, and that you should not avoid testing something if it seems obvious that people will be able to use it. If a sizable portion of your users consistently dislikes a UI element, by all means get rid of it even if it is perfectly usable. back



If you require a short url to link to this article, please use http://ignco.de/323

 
 

Starburst galaxy gives birth to twenty Suns every year [Space Porn]

12 Aug
Say hello to the Haro 11 galaxy, shining brightly from 300 million light-years away. One of the busiest stellar nurseries in the universe, this is one of the youngest examples of a starburst galaxies that is constantly pumping out stars. More »
 
 

Tricky Mantle: Intact Pocket of Ancient Earth May Have Escaped Mixing for 4.5 Billion Years

12 Aug

An analysis of isotopes in Arctic basalts indicates that the rocks may originate from a reservoir of ancient mantle that has avoided being recycled in the planet's active interior since Earth's infancy. The survival of such primitive samples from shortly after the formation of Earth, some 4.5 billion years ago, could provide important clues to the planet's composition and early geophysical history. [More]

 
 

Citizen Scientists Make First Deep Space Discovery With Einstein@Home

12 Aug

While your computer is running idle, it could be finding new pulsars and black holes in deep space.

Three volunteers running the distributed computing program Einstein@Home have discovered a new pulsar in the data from the Arecibo Observatory radio telescope. Their computers, one in Iowa (owned by two people) and one in Germany, downloaded and processed the data that found the pulsar, which is in the Milky Way, approximately 17,000 light years from Earth in constellation Vulpecula.

“The way that we found the pulsar using distributed computing with volunteers is a new paradigm that we’re going to make better use of in astronomy as time goes on,” said astronomer Jim Cordes of Cornell University. “This really has legs.”

About 250,000 volunteers run Einstein@Home, on average donating about 250 teraflops of computing power — equivalent to a quarter of the capacity of the largest supercomputer in the world, says program developer David Anderson of University of California at Berkeley’s Space Sciences Laboratory, co-author of the Aug. 12 discovery announcement in Science.

Einstein@Home has been searching for gravitational waves in the data from the US LIGO Observatory since 2005, and since March 2009 has dedicated one-third of its power to searching for radio pulsars and black holes in the Arecibo data. As of this week, it will start dedicating half of its processing power to data from Arecibo, the world’s largest and most sensitive radio telescope, physicist Bruce Allen of the Max Plank Institute for Gravitational Physics in Germany and co-author of the study announced a press conference Aug. 12.

The new pulsar, dubbed PSR J2007+2722, is a neutron star rotating 41 times per second. Pulsars are birthed when stars five to 10 times as massive as our sun explode into a supernova and then collapse into stars composed almost entirely of neutrons.

The data from Arecibo was processed on the computer in Iowa June 11, and then also processed on a computer in Germany June 14 for validation. The finding was part of a larger search that returned results on July 10, which was the first time a human being was aware of the discovery.

Aerial view of the Arecibo Observatory radio telescope.

The person who looked at the results notified Greenbank Observatory in West Virginia, which immediately pointed their telescope at the new pulsar to verify it. Within hours, Arecibo Observatory in Puerto Rico also pointed their telescope at it.

“This is the first time I’ve worked closely with radio astronomers making a discovery,” said Allen. “It was like watching 5-year-olds tearing Christmas presents. Or like watching someone throw chunks of meat at starving sharks.”

Pulsars are named after the pulsing signals they send to Earth. The pulse comes from the spin and the magnetic field of the neutron star being on two different axes, which acts like an electric generator and creates a beamed signal that rotates like a lighthouse. Cordes says theoretical predictions are that only about 20 percent of the pulsars in the galaxy are detectable on Earth because the beam needs to point directly at us to be detected.

Often, pulsars have a companion star or neutron star that was originally born in the same cloud of gas. But this new pulsar doesn’t and is likely a disrupted recycled pulsar. This means the pulsar once had a companion star that it sucked matter from as the star swelled up into a red giant, which caused the pulsar to cycle faster (recycle). The red giant star then exploded into a supernova and blasted the pulsar away, leaving it alone in space (disrupted).

The new pulsar is one of around 2000 pulsars that have been discovered using radio telescopes in the past 43 years, said Cordes. He estimates there are 20,000 pulsars in the Milky Way that could be detected.

“I see this as a long-term effort where we’re going to find really interesting objects,” said Cordes. “We’d like to find a pulsar orbiting a black hole, or a pulsar orbiting another neutron star so that we can test some of Einstein’s predictions of the general theory of relativity”

You can become part of the effort by downloading BOINC. The program has been used to create 70 different distributed computing projects (almost every one in existence except Folding@Home), and you can decide what fraction of your spare computing power you want to dedicate to each of the 70 projects.

In case you need more incentive, Cordes announced that a second pulsar has been already been discovered in the last month by Einstein@Home users in the United Kingdom and Russia. He’s keeping details to himself for now.

“We have a very large data set,” Cordes added at the press conference. “We just need to cull through it, and Einstein@Home lets us use a much finer comb.”

                   

See Also:

Images: 1) Screen shot of Einstein@Home/B. Knispel, Albert Einstein Institute. 2) Copyright Cornell University.

Follow us on Twitter @jessmcnally and @wiredscience, and on Facebook.

 
 

Why Russians Don’t Get Depressed

12 Aug

The saddest short story I’ve ever read is “The Overcoat,” by Gogol. (It starts out bleak and only gets bleaker.) The second saddest story is “Grief,” by Chekhov. (Nabokov famously said that Chekhov wrote “sad books for humorous people; that is, only a reader with a sense of humor can really appreciate their sadness.”) And then, if I had to make a list of really depressing fiction, I’d probably put everything written by Dostoyevsky. Those narratives never end well.

Notice a theme? Russians write some seriously sad stuff. This has led to the cultural cliche of Russians as a brooding people, immersed in gloomy moods and existential despair. In a new paper in Psychological Science, Igor Grossmann and Ethan Kross of the University of Michigan summarize this stereotype:

One needs look no further than the local Russian newspaper or library to find evidence supporting this belief [that Russians are sad] – brooding and emotional suffering are common themes in Russian discourse. These observations, coupled with ethnographic evidence indicating that Russians focus more on unpleasant memories and feelings than Westerners do, have led some researchers to go so far as to describe Russia as a “clinically masochistic” culture.

This cliche raises two questions. Firstly, is it true? And if it is true, then what are the psychological implications of thinking so many sad thoughts?

The first experiment was straightforward. The psychologists gave subjects in Moscow and Michigan a series of vignettes that described a protagonist who either does or does not analyze her feelings when she is upset. After reading the short stories, the students were then asked to choose the protagonist that most closely resembled their own coping tendencies. The results were clear: While the American undergraduates were evenly divided between people who engaged in self-analysis (the brooders) and those who didn’t, the Russian students were overwhelmingly self-analytical. (Eighty-three Russians read the vignettes; sixty-eight of them identified with the brooders.) In other words, the cliche is true: Russians are ruminators. They are obsessed with their problems.

At first glance, this data would seem like really bad news for Russian mental health. It’s long been recognized, for instance, that the tendency to ruminate on one’s problems is closely correlated with depression. (The verb is derived from the Latin word for “chewed over,” which describes the process of digestion in cattle, in which they swallow, regurgitate and then rechew their food.) The mental version of rumination has a darker side, as it leads people to fixate on their flaws and mistakes, preoccupied with their problems. What separates depression from ordinary sadness is the intensity of these ruminations, and the tendency of depressed subjects to get stuck in a recursive loop of negativity.

According to Grossman and Kross, however, not  all brooders and ruminators are created equal. While American brooders showed extremely high levels of depressive symptomatology (as measured by the Beck Depression Inventory, or BDI), Russian brooders were actually less likely to be depressed than non-brooders. This suggests that brooding, or ruminative self-reflection, has extremely different psychiatric outcomes depending on the culture. While rumination makes Americans depressed, it actually seems to provide an emotional buffer for Russians.

What explains these cultural differences? Grossman and Kross then asked students in Moscow and Michigan to “recall and analyze their “deepest thoughts and feelings surrounding a recent anger-related interpersonal experience”. Then, the subjects were quizzed about the details of their self-analysis. They were asked to rate, on a seven point scale, the extent to which they adopted a self-immersed perspective (a 1 rating meant that they “saw the event replay through your own eyes as if you were right there”) versus a self- distanced perspective (a 7 rating meant that they “watched the event unfold as an observer, in which you could see yourself from afar”). Finally, the subjects were asked about how the exercise made them feel. Did they get angry again when they recalled the “anger-related” experience? Did the memory trigger intense emotions?

Here’s where the cultural differences became clear.* When Russians engaged in brooding self-analysis, they were much more likely to engage in self-distancing, or looking at the past experience from the detached perspective of someone else. Instead of reliving their confused and visceral feelings, they reinterpreted the negative memory , which helped them make sense of it. According to the researchers, this led to significantly less “emotional distress” among the Russian subjects. (It also made them less likely to blame another person for the event.) Furthermore, the habit of self-distancing seemed to explain the striking differences in depressive symptoms between Russian and Americans. Brooding wasn’t the problem. Instead, it was brooding without self-distance. Here’s Grossman and Kross:

Our results highlighted a psychological mechanism that explains these cultural differences: Russians self-distance more when analyzing their feelings than Americans do. These findings add to a growing body of research demonstrating that it is possible for people to reflect either adaptively or maladaptively over negative experiences. In addition, they extend previous findings cross-culturally by highlighting the role that self-distancing plays in determining which type of self-reflection—the adaptive or maladaptive one—different cultures engage in.

The lesson is clear: If you’re going to brood, then brood like a Russian. Just remember to go easy on the vodka.

*I think cross-cultural studies like this are an important reminder than American undergrads are W.E.I.R.D.

PS. Thanks to Jad for the tip! And if you’re interested in a controversial new take on depression and rumination, you might be interested in this article.

 
 

DIY: Build Your Own Sound Activated Flash

11 Aug

Here’s another DIY project for you photography types out there. Did you know it’s possible to build your own sound activated flash? You can, building a box known as a “Picture-Axe”. This device uses a microphone to determine when the action happens, causing the flash to fire and the camera to take a picture.

Enthusiast “renkku” from the Let’s Make Robots forum built his own device, and was kind enough to include step by step instructions on how to build one of your very own.

[via Make]

 
 

How to turn carrots into bacon

09 Aug

Via the BB Submitterator, reader kentbrew says,

Here is an instructional Flickr set that shows you exactly how to turn the carrots you allowed to grow way beyond the point where they were edible by human beings into something verrrry close to bacon.
As an herbivore, I heartily approve!

How to Turn Carrots into Bacon! (Flickr)



 
 

Obscene storm structure from South Dakota!

09 Aug

Chad Cowan and best-selling author of "The Stormchasers" Jenna Blum captured this absolutely INSANE storm structure from South Dakota on July 23, 2010! Earlier in its life-span, as the storm was over the town of Vivian, SD, it dropped a RECORD-BREAKING hail stone -- this monster was a whooping 8 IN