Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts

October 14, 2009

1M Frames Per Second

The video is very long, and I recommend you skip to random points throughout it, as the type of bullet and the material being impacted are changed. The end features cutouts of animals being hit with barrages of bullets.

July 29, 2009

More articles.

1. "In Battle, Hunches Prove to Be Valuable" - This NYT article attempts to explain why, both physiologically and psychologically, some soldiers in war zones are significantly better than most at detecting dangerous situations (e.g. soldiers who are known for their ability to identify IEDs before detonation).

2. "In Study, Texting Lifts Crash Risk by Large Margin" - This NYT article discusses a study of truck drivers (based on eighteen months of taped observation) that shows that texting while driving increases the risk of a crash by up to twenty three times. The authors claim the pattern extends to non-commercial drivers as well. The research is currently undergoing peer review.

3. "Should Thursday be the New Friday? The Environmental and Economic Pluses of the 4-Day Workweek" - Scientific American discusses the potential benefits of four-day workweeks (e.g. four days of ten hours each instead of five days of eight hours each), citing Utah as an example of the savings that can be had: "Local governments in particular have had their eyes on Utah over the last year; the state redefined the workday for more than 17,000 of its employees last August. For those workplaces, there's no longer a need to turn on the lights, elevators or computers on Fridays—nor do janitors need to clean vacant buildings. Electric bills have dropped even further during the summer, thanks to less air-conditioning: Friday's midday hours have been replaced by cooler mornings and evenings on Monday through Thursday. As of May, the state had saved $1.8 million."

July 11, 2009

Public vs. Science: Evolution and Climate

So, Gmail informs me that there have been 42 posts and comments since the last time I read anything over here ... even though I'm still not caught up, I felt compelled to pass on this fascinating study which not only compares what the public thinks about evolution and global warming with what scientists think, but it also shows the difference between what the public thinks that scientists think and what they actually do think.

June 16, 2009

Clouds.

A new class of cloud was discovered this week: asperatus clouds (above). In honor of this surprising find I decided to completely take a posting from New Scientist and bring it over here! Check out the nine interesting cloud formations below (original post is here and includes descriptions of how each forms).

Fallstreak hole:
Roll cloud:


Pink UFO (altocumulus lenticularis):


Cap cloud:

Wave cloud:
Virga:

Mammatus:


Kelvin-Helmholtz:

Horseshoe vortex:

May 26, 2009

Lost. [Spoilers contained in this post!]


With only one season remaining I think it is time to make some predictions about how Lost is going to resolve the ridiculous mountain of unanswered (unanswerable?) questions the show has allowed to pile up over the years. As a quick refresher of what last happened in the Lost universe, here is the Wikipedia summary of the season five finale:
In 1977, the survivors succeed in detonating the modified nuclear bomb at the construction site of the Swan station, the finale ending when the bomb is detonated. In 2007, Locke and the Others travel to the base of the four-toed statue, where Jacob lives. Locke is revealed to be an impostor: an old acquaintance of Jacob who tricks Ben into killing Jacob. In flashbacks, Jacob visits several of the main characters.
In Lost physics the explosion of the bomb in 1977 is supposedly going to eliminate the underground source of the magnetic field so that Oceanic flight 815 will not be brought down by in the future, thereby restoring the world as it was when the main characters boarded the plane in Sydney. I have a really major problem with this logic: changing an event in 1977 alters which
of the potential futures becomes reality from that moment onward--that is, everything from that moment forward represents a different future from the one that occurred without the explosion. Here's a rough idea of what I mean:

I guess my main point is just that detonating that bomb ensures that it is not possible for the future to turn out the way it already has--expressed another way, the future that we, the viewers, have already seen cannot possibly be repeated. We have jumped from one potential future to another in which the plane cannot crash because of the magnetic field, even if everyone is on the plane as they were in the future we already know (this all assumes that Faraday's belief that the detonation will destroy the magnetic field is correct).

All that said, I think one of the consistent themes throughout the show has been the inevitability of the role each person plays. In the end all those who are 'supposed to be on the island' will be there whether the plane crashes or not; Jack will become de facto leader; Sawyer will initially rebel but become respectable when need be; Ben will connive and backstab; et cetera. This seems to imply that we should be able to piece together the basic point of the show--if everyone will fill the same role throughout this alternate future then the moral will be the same. Before I go off on another long ramble I'll ask a few questions of the floor: Is my reasoning sound? What do you think of differently? What is the moral of the show? How is Jacob's old friend inhabiting Locke's body? (I didn't even bother to touch on this just yet.)

Oh, and here's a barely-related GraphJam post that I enjoyed:

May 20, 2009

Video dump.

Rather than a bunch of annoying little posts I have decided to bug you with only one longer one filled with short videos.

Fenway cameraman tells you about his camera and shows you how it is controlled:

Fenway HD Camera - Sony HDC-910 - Canon 75x from Tom Guilmette on Vimeo.



The da Vinci surgical system:


Escalator spinning:


The walking table:


LSD tested on a British army group:

May 19, 2009

(Twin) brother by another father.


I am not even going to bother moving beyond fact in this case: a woman had sex with her boyfriend, and then cheated on him soon after, leading to the one-in-a-million (seriously, 1/1,000,000) outcome of a set of twins with different fathers. The boyfriend has been told of the infidelity and has agreed to raise both boys as his own, despite being biological father to only one. Of course, since modern news stories only ever seem to hamper progress toward social equality, the family is black, the parents unmarried, and the lot of them live in good ol' Texas. America, fuck yeah!

May 07, 2009

Crows may knock the great apes down a peg.


As some of you may know, it was shown recently that magpies are self-aware (this was done using the mirror test). This put the bird amongst the small group of animals that fall into this category: "great apes (bonobos, chimpanzees, orangutans, gorillas, humans), bottlenose dolphins, Orcas, elephants, and European Magpies" (stolen from Wikipedia).

Now crows, a relative of magpies in the corvids family ("a group that includes crows, ravens, rooks, jackdaws, jays and magpies" (BBC)), are making a run for the title of smartest animal around. Check out this article by the BBC that discusses tool use and other evidence of meaningful thought within New Caladonian crow communities. If you look at nothing else, check out the first video, in which a crow picks up a straight length of wire, bends it to create a hook on one end, and then uses this newly created tool to reach a bucket of treats at the bottom of a small shaft.

And if you are still interested in finding out more about crows check out this TED talk on the subject of useful things we may be able to train crows to do.

May 01, 2009

A copycat science Friday

Thank you, Chris, for giving me an excuse to get rid of some of the tabs I have had open for the last week. Here are some of the most interesting science articles (and one video) that I have found recently. Though each is summarized, I do recommend you check out the articles because in some cases I have had to drastically simplify, or as in the case of the camera and the video, completely omit a meaningful explanation of the achievement.

Lip-reading computer: Scientists at the University of East Anglia in Norwich (UK) have developed a lip-reading computer that can automatically transcribe and translate silent videos of people speaking in a number of languages. One potentially important use for this computer is as an aide to police investigating crimes caught on silent CCTV cameras.
Quantum computers (and hackers!): Quantum computers and encryption are very slowly coming into use in the real world (the results of the State of Geneva election were secured using a quantum system), and (academic) hackers are doing a pretty damn good job keeping pace.
The world’s fastest camera: “[The] camera snaps images less than a half a billionth of a second long, capturing over six million of them in a second continuously.” Enough said.
Wolfram Alpha: Unfortunately this is not a person’s name (the developer’s name is Stephen Wolfram), but rather a web tool designed to answer questions that are asked in modern English. In Wolfram’s words, "Like interacting with an expert, it will understand what you're talking about, do the computation, and then present you with the results.”
”Anatomy of a crash”: In its efforts to improve the safety of the Ford Falcon, Ford engineers decided that to make the (economically, not absolutely) safest possible car they needed to first research crashes in more detail. Their results show, in milliseconds, the general progression of a car crash. Scroll to the bottom for the breakdown.
Dr. Quantum explains the double-slit experiment: This video is a great introduction to the basis of quantum theory, and goes into great detail explaining this experiment, which I can't even begin to summarize here.

Science Friday

The abilities of tapping/dancing to music and being able to mimic sounds are related in the brain say researchers. Here's a great video of a cockatoo rocking out to the Backstreet Boys. It's definitely worth a watch, provided you can handle all the high-pitched ear-wrenching screeching (not to mention the birds' wails).

February 12, 2009

... and More Articles!

Hey, if you're going to steal from Bart, why stop at just one?

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"Dr. Doom," famously pessimistic NYU economics Professor Nouriel Roubini, argues that the best solution for resolving the toxic asset problem is (temporary) nationalization. Without it, he argues other options result in one of three problems:

If government takes on debt:
1. Overvaluing assets ---> Massive cost to taxpayers
2. Undervaluing assets ---> Risks massive bank failures
If government helps private sector keep debt:
3. Non-transparency and/or overcomplication (see Tax Code, the)

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In a rather odd article, scientists have discovered a bacterium in the Russian mammoth graveyard that may extend the duration of human lives in general, as well as the duration of their sex lives.

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I only read a little bit of this article, but it seems there's been something of a real-life Catch Me If You Can, with a woman taking on fake lives at Ivy League schools as part of her rouse.

Articles!

A quick article dump to start the day’s blogging activities.

”Sarah Palin's $159,050 Conflict of Interest” - Todd Palin is currently racing a “snow machine” 1,971 miles across Alaska, during which his “Arctic Cat's powerful two-stroke engine will emit the same amount of hydrocarbons as an automobile driving from Chicago to San Francisco and back 150 times.” Fantastic. And it only gets trashier and more polluting. First, the pollution: “[During the race] Todd Palin will release as many cancer-causing and smog-forming pollutants as a Chevy Malibu driven around the Earth at its equator 28 times.” Now, the conflict of interest: the race is sponsored by “[…] the petroleum giants Tesoro and Conoco-Phillips; State Farm, Wells Fargo, Frontier Airlines, Alaska Airlines and the Alaska First National Bank.” You may be saying, “But you are not being fair. Maybe the Palins do not get a shady benefit from this.” Well, Todd is an annual competitor (seemingly surprising for a race with a field of 40 people willing to do this kind of evil to the environment) who has only one four times. “Once after Sarah was elected to the Wasilla City Council, once after she was elected mayor, the year she was appointed to the Alaska Oil and Gas Commission, and the year she was elected governor.” Okay, okay, maybe I jumped the gun. Sorry for trying to shame such an upstanding family.

“Video Games Are Good For Children – EU Report” - Nothing too surprising here, but it is nice to have confirmation of something I believe: An EU panel determined that "’video games can stimulate learning of facts and skills such as strategic thinking, creativity, cooperation and innovative thinking, which are important skills in the information society.’" Yay! An excuse to play more video games!

Unemployment as stimulus -
“A Novel Approach: Using Unemployment Benefits as a Means for Stimulus” – An interesting plan to maximize the benefits created by unemployment payments: instead of paying out cash to an unemployed person for a set amount of time provide that person with a voucher that subsidizes them as an employee. For example, assume Mr. Doe is unemployed and receives $200 each week in unemployment payments ant that were anyone to hire Mr. Doe it would cost that firm $500 each week, a (made-up) prohibitive amount. The likely outcome here is that he remains unemployed. But if Mr. Doe can suddenly walk into an interview and say, “Instead of costing you $500 each week I will only cost you $300 each week and the money that would have been my unemployment check is now paying the other $200 of the salary.” Obviously this has limitations (e.g. what happens when Mr. Doe’s salary is no longer subsidized?), but in the short term this plan creates a greater overall income, implying a greater overall level of consumption, for the same government investment. At the same time it increases the overall production level of the economy.

“Big Satellites Collide 500 Miles Over Siberia” – This story seems pretty ridiculous at first, though it does highlight the very real concern of the volume of junk orbiting Earth. Apparently a non-functional Russian satellite launched in 1993 and described as “[…] out of control” crashed into a commercial satellite launched in 1997, creating thousands of particles that will now orbit Earth waiting to smash into other man-made satellites. I can’t help but think of this as a case of modern space zombies in which each zombie (read: smashed satellite) spends the rest of its time trying to create more zombies (read: smash other satellites). For perspective on the dangers we are facing from orbiting junk only fifty-two years into man’s era of sending crap into space: “[…] orbital debris is now the biggest threat to a space shuttle in flight, surpassing the dangers of liftoff and return to Earth.” I will now officially swear off space flight until we have orbiting Roombas keeping me safe.

“Letting Scientists Off the Leash” - This is an interesting article written by a researcher at Stanford University who discusses the flaws in the way money for research is distributed. His main point is that the typically conservative review boards that approve funding for grant proposals do not fund very imaginative or risky research. This leads to a situation where most of the ideas we are pursuing are those that we are already sure we can turn into a profit, not those that could have a substantially larger impact but at the same time carry larger risks (in that they are more likely than the boring projects to have an outcome different from that discussed when the grant was proposed). I don’t know too much about this, but I do support the idea of devising a more efficient means of identifying and funding riskier and more creative research.

December 03, 2008

Invasion of the Body Snatchers

"Swedish researchers presented evidence that the brain, when tricked by optical and sensory illusions, can quickly adopt any other human form, no matter how different, as its own."

Basically, they use VR and the power of suggestion to "trick" people into believing they're in another body - to the point that the subjects actually flinch when the external body is poked.

Pretty cool.

November 19, 2008

Science finally lives up to expectations!

I just read about a team of European doctors who recently completed a successful windpipe transplant surgery. The important part is that the donor windpipe "[...] was stripped of its donor’s cells [...]" and coated in the recipient's stem cells. Since the surgery the patient has had to take no immunosuppressant drugs and her body has had no immune-system reaction to the transplant other than the healing of the surgical wounds.

Is it just me or has anyone else been waiting for this since Dolly was cloned? (I would like to note that at the time of Dolly's birth I still lived in Las Vegas and was ten years old.) When I first heard about Dolly I assumed we would be cloning humans and body parts inside of the decade basing this on a vague assumption along the lines of: the process of cloning a sheep has to overlap at least 99% with the process of cloning a person. Aside from eventually being told of the various ethical reasons for the ban on the cloning of humans I do not today know all that much more about the science of procedures like this. I took the obligatory high-school classes, but did not enjoy them much and didn't really learn too much.

Today I simply do not know enough about the science behind this work to comprehend why progress is so slow, and that leads me to frustration over what I perceive to be the relatively slow pace of development. I suppose that in this way my ignorance usually forces me to underestimate and subsequently ignore the value of achievements like this, so I am posting this as part of an effort to slowly educate myself a bit.