From Science Daily: Hubble Provides New Evidence For Dark Matter Around Small Galaxies
This is pretty cool. Hubble found, in the midst of several large galaxies being torn apart by each other's gravity, a cluster of dwarf galaxies that are smooth and undisturbed. Astronomers think this indicates a thick "cushion" of dark matter protecting them.
Friday, March 20, 2009
Wednesday, March 18, 2009
whoops
Wow, it's been almost a month since I posted. Sorry about that. Lots of family visits, midterms, and awesome vacation are to blame.
It's a good thing I don't actually have a readership, huh?
It's a good thing I don't actually have a readership, huh?
Friday, February 20, 2009
hamster generators and more
From New Scientist: Innovation: Technology to harness your power moves
More sweet ideas that use energy from the normal activities of both humans and hamsters.
More sweet ideas that use energy from the normal activities of both humans and hamsters.
fuelulose? or cellufuel?
From ScienceDaily: Two-step Chemical Process Turns Raw Biomass Into Biofuel
Researchers at the University of Wisconsin-Madison have developed a way to convert "raw" biomass, that is, cellulose, into usable biofuel. Cellulose is the most common organic compound on Earth, and through this, we could make biofuel without using the food parts of plants.
The punny portmanteau brand names will be endless.
Researchers at the University of Wisconsin-Madison have developed a way to convert "raw" biomass, that is, cellulose, into usable biofuel. Cellulose is the most common organic compound on Earth, and through this, we could make biofuel without using the food parts of plants.
The punny portmanteau brand names will be endless.
about eliminiating AIDS
From New Scientist: Are we about to eliminate AIDS?
This article discusses steps that could be taken to eliminate AIDS. Even though there is no cure or vaccine, the antiretroviral course available allows HIV+ people to "live a long life and almost never pass on the virus, even through unprotected sex." Through worldwide, regular, mandatory testing and free distribution of those drugs, it's theorized that AIDS could be eliminated. The author hits on the privacy concerns that could come up a massive health initiative like this. Good read, and very hopeful.
This article discusses steps that could be taken to eliminate AIDS. Even though there is no cure or vaccine, the antiretroviral course available allows HIV+ people to "live a long life and almost never pass on the virus, even through unprotected sex." Through worldwide, regular, mandatory testing and free distribution of those drugs, it's theorized that AIDS could be eliminated. The author hits on the privacy concerns that could come up a massive health initiative like this. Good read, and very hopeful.
42 unknown
From Scientific American: Within Any Possible Universe, No Intellect Can Ever Know It All
David Wolpert, a computer scientist at NASA, proves that as part of the universe, we can never understand and learn every single thing about it.
David Wolpert, a computer scientist at NASA, proves that as part of the universe, we can never understand and learn every single thing about it.
helping out at the zoo
From Scientific American: Crowdsourcing the cosmos: Amateurs sift through astronomical data
This is pretty cool. The Galaxy Zoo 2 is a project where amateur astronomers can help classify data. Looks fun.
This is pretty cool. The Galaxy Zoo 2 is a project where amateur astronomers can help classify data. Looks fun.
old gas learning new tricks
From New Scientist: 'Primordial' gas ring gives birth to baby galaxies
The Leo ring is "a giant stream of hydrogen and helium gas" around two "older" galaxies about 35 million light years away. Discovered in the early '80s, the ring is thought to have formed early in the history of the universe. Recently, though, clumps of young stars have been found in the ring. These "infant dwarf galaxies" are considered very unique because they formed without the assistance of dark matter, which is strange because it's theorized that dark matter is the seed of galaxies, pulling regular matter in, and also because other dwarf galaxies have been observed to contain up to 10,000 times as much dark matter as regular matter. Scientists are planning to measure the metallicity of the cloud to see if it really is as old as they think it is.
The Leo ring is "a giant stream of hydrogen and helium gas" around two "older" galaxies about 35 million light years away. Discovered in the early '80s, the ring is thought to have formed early in the history of the universe. Recently, though, clumps of young stars have been found in the ring. These "infant dwarf galaxies" are considered very unique because they formed without the assistance of dark matter, which is strange because it's theorized that dark matter is the seed of galaxies, pulling regular matter in, and also because other dwarf galaxies have been observed to contain up to 10,000 times as much dark matter as regular matter. Scientists are planning to measure the metallicity of the cloud to see if it really is as old as they think it is.
the barns of the earth
From New Scientist: Do gravity holes harbour planetary assassins?
Ignore the title of this article; it relates to a silly extra article. The bulk of this is about Lagrangian points, which are places in space where the gravitational field of the Earth (or any planet) cancels out the gravity of the Sun. These areas actually have zero gravity, as opposed to the microgravity we usually see. A pair of probes called STEREO that launched in 2006 to observe the sun will also be used to observe L4 and L5, the two most stable of Earth's Lagrangian points.
The author also discusses Lagrangian point in regards to the most popular theory of the Moon's origin. If a Mar-sized object collided with the Earth in the distant past to form the Moon, where did that object come from? Perhaps L4 or L5, where the object would have been able to grow to that size and then be nudged out of orbit by the gravity of another body in the solar system, like Venus.
Ignore the title of this article; it relates to a silly extra article. The bulk of this is about Lagrangian points, which are places in space where the gravitational field of the Earth (or any planet) cancels out the gravity of the Sun. These areas actually have zero gravity, as opposed to the microgravity we usually see. A pair of probes called STEREO that launched in 2006 to observe the sun will also be used to observe L4 and L5, the two most stable of Earth's Lagrangian points.
The author also discusses Lagrangian point in regards to the most popular theory of the Moon's origin. If a Mar-sized object collided with the Earth in the distant past to form the Moon, where did that object come from? Perhaps L4 or L5, where the object would have been able to grow to that size and then be nudged out of orbit by the gravity of another body in the solar system, like Venus.
tell me a story about quantum theory
From Scientific American: Was Einstein Wrong?: A Quantum Threat to Special Relativity
I've heard how there is something about quantum theory that violates Einstein's theory of relativity, but I didn't know that at least part of that is non-locality. I should have, considering my fascination with quantum entanglement. Anyway, this article details the history of the contradictions between these two theories. Being very lay-person and also very ill, it took me a long time to read it, but it's definitely very interesting.
I've heard how there is something about quantum theory that violates Einstein's theory of relativity, but I didn't know that at least part of that is non-locality. I should have, considering my fascination with quantum entanglement. Anyway, this article details the history of the contradictions between these two theories. Being very lay-person and also very ill, it took me a long time to read it, but it's definitely very interesting.
Saturday, February 14, 2009
homi vs. homi
From ScienceDaily: Humans And Chimpanzees Genetically More Similar Than One Yeast Variety Is To Another
Scientists at the University of Gothenburg in Sweden say that humans and chimps are more similar on that level than two yeast species in the same genus. (FYI, we're in the same family as chimps, Hominidae or the great apes.)
I do think it's pretty cool... I like chimps, at least theoretically, as I don't know if I've ever met them. But they're cute, and they seem smart and feisty, and except for the whole endangered-species thing, I sometimes think I'd rather be an ape than a human.
I think this is a crappy comparison, though. This article says that there is a 4% difference in genes between the two yeast species, Saccharomyces cerevisiae and S. paradoxus, and a 1% difference between chimps and humans.
So, S. cerevisiae has 12,156,677 base pairs. I couldn't find a figure for the other. But say it's the same amount. With a 4% difference, that means around 486,267 base pairs are out of order or replaced in some way.
Not such an exact number for humans; everything says "approximately 3 billion." We can go with that, though. No numbers for the chimps, either, but you should look at the wiki article because they are adorable. Anyway. A 1% difference in 3 billion genes is... 3 million.
I just think there is a slight difference between almost 500,000 and 3 million, no matter the percentages.
Ah, well, I'm not a geneticist or anything. Maybe it is deep and meaningful. It is pretty cool to read about the Chimpanzee genome project and look at the only really obvious difference: at some point, for us, the 2nd and 3rd chromosomes that the chimp and human lines shared fused into one larger chromosome, with the addition about 150,000 or so base pairs. And since according to that article I posted this morning, the human and chimp line underwent the burst of genetic duplication that is thought to be the basis of our "human-ness," chimps are like our extended family, and I'm not trying to make a taxonomy pun here. They're like our cousin. Maybe second cousin, once removed. Hey, I don't mind grooming, but I won't eat mites.
Scientists at the University of Gothenburg in Sweden say that humans and chimps are more similar on that level than two yeast species in the same genus. (FYI, we're in the same family as chimps, Hominidae or the great apes.)
I do think it's pretty cool... I like chimps, at least theoretically, as I don't know if I've ever met them. But they're cute, and they seem smart and feisty, and except for the whole endangered-species thing, I sometimes think I'd rather be an ape than a human.
I think this is a crappy comparison, though. This article says that there is a 4% difference in genes between the two yeast species, Saccharomyces cerevisiae and S. paradoxus, and a 1% difference between chimps and humans.
So, S. cerevisiae has 12,156,677 base pairs. I couldn't find a figure for the other. But say it's the same amount. With a 4% difference, that means around 486,267 base pairs are out of order or replaced in some way.
Not such an exact number for humans; everything says "approximately 3 billion." We can go with that, though. No numbers for the chimps, either, but you should look at the wiki article because they are adorable. Anyway. A 1% difference in 3 billion genes is... 3 million.
I just think there is a slight difference between almost 500,000 and 3 million, no matter the percentages.
Ah, well, I'm not a geneticist or anything. Maybe it is deep and meaningful. It is pretty cool to read about the Chimpanzee genome project and look at the only really obvious difference: at some point, for us, the 2nd and 3rd chromosomes that the chimp and human lines shared fused into one larger chromosome, with the addition about 150,000 or so base pairs. And since according to that article I posted this morning, the human and chimp line underwent the burst of genetic duplication that is thought to be the basis of our "human-ness," chimps are like our extended family, and I'm not trying to make a taxonomy pun here. They're like our cousin. Maybe second cousin, once removed. Hey, I don't mind grooming, but I won't eat mites.
now you see the true advantage of being third!
From ScienceDaily: Survival Of The Weakest? Cyclical Competition Of 3 Species Favors Weakest As Victor
An curious study from a German university about evolution, the idea of the survival of the fittest, and game theory. As we know, "these processes increase the 'fitness' of the species overall, since, of two competing species, only the fittest would survive." In simulations, researchers pitted three cyclically competitive species against one another, so that one species is weaker than the second, but stronger than the third. Sort of like rock-paper-scissors, only scissors can't be beaten by rock; rock's a weakling. Strangely, interestingly enough, the two strongest species kill each other off, and the third weaker species survives. Rock isn't weak; he's the Heir of Slytherin. Whether the differences in strength are large or small, the third species is the winner "with very high probability."
"The Survival of the fittest" as a metaphor for natural selection has allowed for a lot of interpretation, namely as the continuing triumph of the strong over the weak. A study like shows natural selection is not that pat. "Fittest" doesn't always mean strongest/smartest/fastest/sharpest. Leading the study was Prof. Erwin Frey, who says that this study "shows once more that chance plays a big part in the dynamics of an ecosystem."
Don't discount this just because it's a simulation, because Prof. Frey recalls, "Incidentally, in experiments that were conducted a couple of years ago on bacterial colonies, in order to study cyclical competition, there was one clear result: The weakest of the three species emerged victorious from the competition."
An curious study from a German university about evolution, the idea of the survival of the fittest, and game theory. As we know, "these processes increase the 'fitness' of the species overall, since, of two competing species, only the fittest would survive." In simulations, researchers pitted three cyclically competitive species against one another, so that one species is weaker than the second, but stronger than the third. Sort of like rock-paper-scissors, only scissors can't be beaten by rock; rock's a weakling. Strangely, interestingly enough, the two strongest species kill each other off, and the third weaker species survives. Rock isn't weak; he's the Heir of Slytherin. Whether the differences in strength are large or small, the third species is the winner "with very high probability."
"The Survival of the fittest" as a metaphor for natural selection has allowed for a lot of interpretation, namely as the continuing triumph of the strong over the weak. A study like shows natural selection is not that pat. "Fittest" doesn't always mean strongest/smartest/fastest/sharpest. Leading the study was Prof. Erwin Frey, who says that this study "shows once more that chance plays a big part in the dynamics of an ecosystem."
Don't discount this just because it's a simulation, because Prof. Frey recalls, "Incidentally, in experiments that were conducted a couple of years ago on bacterial colonies, in order to study cyclical competition, there was one clear result: The weakest of the three species emerged victorious from the competition."
sweet personal dynamo, and, ahem, a rant
From New Scientist: Innovation: Personal dynamo
This is a sweet little gadget. Hook it on something that's going to move, and as it rolls on the ground, it generates electricity. Not a huge amount, but the dynamo is intended to shore spotty communication in developing or undeveloped countries, specifically Sub-Saharan Africa; inventor Cedrick Ngalande says, "At normal walking speeds we have gotten more than 2 watts, which is more than enough for running cellphones or radios."
I think it would be pretty awesome for everyone, though. Backpackers, campers, anyone who's on the go in a way that involves a lot of moving yourself, like people who fly a lot (not sure if security'd let it on the plane, but anyway). The author also suggests it as part of of a kid's toy so the batteries couldn't run out as long as the kid's batteries didn't run out.
For some reason I've gotten into the habit of reading comments... the people who commented on this article art pissed. They think it's the worst idea ever. Solar's better; wind's better; wind-up's better. All those poor starving people shouldn't have to walk for their energy; roads suck in undeveloped villages; it'll get covered with shit. IT SUCKS AND IT WILL NEVER EVER BE USEFUL.
To them I say: hey, guys. Stop bitching. Clean, inexpensive energy solutions are needed and useful, and we don't have to be monogamous about how we get it. Different things are useful in different situations. Neither the author nor the inventor suggested we strap one of these on the back of every African south of -15°, just like it would be silly to suggest that solar, wind, and water power can meet every need everywhere.
I get the impression that these posters think that impoverished starving people either shouldn't be or shouldn't have to think about more than food, or perhaps that richer nations shouldn't be thinking about more than feeding them. That make assuage their hunger for a while, but starvation isn't the problem. Starvation is a symptom; poverty is the problem.
Corrupt, inept governments mismanage land, money, and natural resources. The people are generally uneducated and illiterate. Populations tend to be disorganized or even isolated, and completely unprotected by their governments from both invading and native armies as well as the exploitative rich. Conflict and genocide caused by changing climate, overpopulation, greed, racism, and overgrown tribalism are widespread. And, compounded with and aggravated by all of that, an HIV epidemic where physical and prophylactic safety are scarce, rape is rampant, and too many people know little about the disease and are unable to learn more.
But let's just about feeding them, right?
This is a sweet little gadget. Hook it on something that's going to move, and as it rolls on the ground, it generates electricity. Not a huge amount, but the dynamo is intended to shore spotty communication in developing or undeveloped countries, specifically Sub-Saharan Africa; inventor Cedrick Ngalande says, "At normal walking speeds we have gotten more than 2 watts, which is more than enough for running cellphones or radios."
I think it would be pretty awesome for everyone, though. Backpackers, campers, anyone who's on the go in a way that involves a lot of moving yourself, like people who fly a lot (not sure if security'd let it on the plane, but anyway). The author also suggests it as part of of a kid's toy so the batteries couldn't run out as long as the kid's batteries didn't run out.
For some reason I've gotten into the habit of reading comments... the people who commented on this article art pissed. They think it's the worst idea ever. Solar's better; wind's better; wind-up's better. All those poor starving people shouldn't have to walk for their energy; roads suck in undeveloped villages; it'll get covered with shit. IT SUCKS AND IT WILL NEVER EVER BE USEFUL.
To them I say: hey, guys. Stop bitching. Clean, inexpensive energy solutions are needed and useful, and we don't have to be monogamous about how we get it. Different things are useful in different situations. Neither the author nor the inventor suggested we strap one of these on the back of every African south of -15°, just like it would be silly to suggest that solar, wind, and water power can meet every need everywhere.
I get the impression that these posters think that impoverished starving people either shouldn't be or shouldn't have to think about more than food, or perhaps that richer nations shouldn't be thinking about more than feeding them. That make assuage their hunger for a while, but starvation isn't the problem. Starvation is a symptom; poverty is the problem.
Corrupt, inept governments mismanage land, money, and natural resources. The people are generally uneducated and illiterate. Populations tend to be disorganized or even isolated, and completely unprotected by their governments from both invading and native armies as well as the exploitative rich. Conflict and genocide caused by changing climate, overpopulation, greed, racism, and overgrown tribalism are widespread. And, compounded with and aggravated by all of that, an HIV epidemic where physical and prophylactic safety are scarce, rape is rampant, and too many people know little about the disease and are unable to learn more.
But let's just about feeding them, right?
old-timey stars super friendly
From ScienceDaily: Ultra-Compact Dwarf Galaxies: Stars Packed Together In Early Universe A Million Times More Closely
ScienceDaily always has very literal titles, doesn't it? Kind of ruins the little bit of surprise for my post. Perhaps they should use more metaphors and figurative, oblique language. Or perhaps I should just stop quoting the titles beforehand.
Anyway! Ultra-compact dwarf galaxies! Sweet! These were very early galaxies, and very small and dense: mostly around 60 light years across, but a million times more crowded than what we're used to, so there was around a million stars in a cubic light year instead of just one.
ScienceDaily always has very literal titles, doesn't it? Kind of ruins the little bit of surprise for my post. Perhaps they should use more metaphors and figurative, oblique language. Or perhaps I should just stop quoting the titles beforehand.
Anyway! Ultra-compact dwarf galaxies! Sweet! These were very early galaxies, and very small and dense: mostly around 60 light years across, but a million times more crowded than what we're used to, so there was around a million stars in a cubic light year instead of just one.
genetic "volcano"
From ScienceDaily: Did Burst Of Gene Duplication Set Stage For Human Evolution?
This is pretty crazy stuff. Around 10 million years ago, the common ancestor of chimpanzees and humans started undergoing gene duplication at a much faster rate than normal, while other mutations like a single nucleotide change became less prevalent.
Evan Eichler, a geneticist with the University of Washington says, "There's a big burst of activity that happens where genomes are suddenly rearranged and changed." Duplication slowed down after the chimp and human lines diverged. '"You might like to think that humans are special because we have more duplications than did earlier species," he says, "but that's not the case."'
Apparently, though, this crazy burst of duplication is what makes humans human. It "creat[ed] an instability that persists in the genome of modern humans and contributes to diseases like autism and schizophrenia. But that gene duplication also may be responsible for a genetic flexibility that has resulted in some uniquely human characteristics."
This is pretty crazy stuff. Around 10 million years ago, the common ancestor of chimpanzees and humans started undergoing gene duplication at a much faster rate than normal, while other mutations like a single nucleotide change became less prevalent.
Evan Eichler, a geneticist with the University of Washington says, "There's a big burst of activity that happens where genomes are suddenly rearranged and changed." Duplication slowed down after the chimp and human lines diverged. '"You might like to think that humans are special because we have more duplications than did earlier species," he says, "but that's not the case."'
Apparently, though, this crazy burst of duplication is what makes humans human. It "creat[ed] an instability that persists in the genome of modern humans and contributes to diseases like autism and schizophrenia. But that gene duplication also may be responsible for a genetic flexibility that has resulted in some uniquely human characteristics."
black holes in possible action
From io9: What Would a Black Hole Really Look Like?
io9 is a fun science fiction blog that's especially awesome because it also talks about science and how reality and fiction collide. In this post, Annalee talks about science art and illustration of black holes. There are a couple really sweet videos. Can't go wrong with the collision of two black holes!
io9 is a fun science fiction blog that's especially awesome because it also talks about science and how reality and fiction collide. In this post, Annalee talks about science art and illustration of black holes. There are a couple really sweet videos. Can't go wrong with the collision of two black holes!
electric sahara acid dust
From ScienceDaily: Unexpected Discovery Could Impact On Future Climate Models
Astronomers at the University of Hertfordshire looking for new extrasolar planets accidentally discovered that dust is affected by electric fields. Their polarimeter got dusty, and the dust affected light in such a way that showed the dust particles were aligning vertically. Not only could this explain how Saharan dust can make it to Northern Europe and the Caribbean, but "if it’s proven the dust is affected by electric fields, elements of current climate models may have to be re-worked with this new information, to remain accurate," says Joseph Ulanowski with the university's Centre for Atmospheric and Instrumentation Research.
Astronomers at the University of Hertfordshire looking for new extrasolar planets accidentally discovered that dust is affected by electric fields. Their polarimeter got dusty, and the dust affected light in such a way that showed the dust particles were aligning vertically. Not only could this explain how Saharan dust can make it to Northern Europe and the Caribbean, but "if it’s proven the dust is affected by electric fields, elements of current climate models may have to be re-worked with this new information, to remain accurate," says Joseph Ulanowski with the university's Centre for Atmospheric and Instrumentation Research.
son of a cabbage
From COSMOS Magazine: Darwin at 200: The origin of a theory
COSMOS did a series this week on Charles Darwin, evolution, and the Galapagos in celebration of his 200th birthday. (I wonder if they did the stripper-in-the-cake thing, too?)
This particular article details the history of the idea and the theory beginning in 1699. It's an entertaining read. The best line:
"Jocular types greeted each other on the street with phrases like, 'Well, son of a cabbage, whither art thou progressing?'"
Ah, Victorians and their pop culture references.
COSMOS did a series this week on Charles Darwin, evolution, and the Galapagos in celebration of his 200th birthday. (I wonder if they did the stripper-in-the-cake thing, too?)
This particular article details the history of the idea and the theory beginning in 1699. It's an entertaining read. The best line:
"Jocular types greeted each other on the street with phrases like, 'Well, son of a cabbage, whither art thou progressing?'"
Ah, Victorians and their pop culture references.
a slight lack of scoundrel
From NewScientist: Meet the scoundrels of astronomy
The title and premise of this article/gallery is hilarious, but unfortunately there are only four scoundrels, and they mainly just made shit up.
But I think the word "scoundrel" should be used more often. Have to think of a way to work it into a conversation.
The title and premise of this article/gallery is hilarious, but unfortunately there are only four scoundrels, and they mainly just made shit up.
But I think the word "scoundrel" should be used more often. Have to think of a way to work it into a conversation.
Friday, February 13, 2009
the wacky world of lyme
From ScienceDaily: Scientists Identify Potential Key To Lyme Disease
Researchers from UT Southwestern Medical Center have noted that the bacteria that causes Lyme disease, Borrelia burgdorfei, is especially dependent on getting manganese from its host to establish infection, as opposed to iron like most pathogens. They then identified the specific enzyme that captures manganese for the bacteria. When they engineered a strain of B. burgdorfei lacking that protein and introduced it to mice, the bacteria wasn't able to infect.
I don't know if I would find this interesting except that I had Lyme a few years ago. It's fairly common where I live. My father and one of my sisters had it, too. I missed the telltale "bull's-eye" rash and must have thought I had the flu if I ever had the fever and malaise; when I was diagnosed and treated it was all extreme fatigue, joint pain, headaches, "Lyme fog," depression, mild hallucinations, and alternating insomnia and hypersomnia. It's a crazy, crazy disease. I would kind of suggest, you know, not getting it.
Researchers from UT Southwestern Medical Center have noted that the bacteria that causes Lyme disease, Borrelia burgdorfei, is especially dependent on getting manganese from its host to establish infection, as opposed to iron like most pathogens. They then identified the specific enzyme that captures manganese for the bacteria. When they engineered a strain of B. burgdorfei lacking that protein and introduced it to mice, the bacteria wasn't able to infect.
I don't know if I would find this interesting except that I had Lyme a few years ago. It's fairly common where I live. My father and one of my sisters had it, too. I missed the telltale "bull's-eye" rash and must have thought I had the flu if I ever had the fever and malaise; when I was diagnosed and treated it was all extreme fatigue, joint pain, headaches, "Lyme fog," depression, mild hallucinations, and alternating insomnia and hypersomnia. It's a crazy, crazy disease. I would kind of suggest, you know, not getting it.
looking forward
From New Scientist: Asteroid bound for Earth! Warn your grandchildren
So, this 560m-diameter meteor has a 1-in-1400 chance of hitting earth in the last three decades next century. I won't know, because I doubt I'll be alive between 2169 and 2199. But it's said that if "they" (whoever they is) decide to send something to it to knock it off course, the best time would between 2060 and 2080, when the meteor'll be making close passes to Earth. And I really really hope I'm alive 50 years from now, because that would be something to see!
So, this 560m-diameter meteor has a 1-in-1400 chance of hitting earth in the last three decades next century. I won't know, because I doubt I'll be alive between 2169 and 2199. But it's said that if "they" (whoever they is) decide to send something to it to knock it off course, the best time would between 2060 and 2080, when the meteor'll be making close passes to Earth. And I really really hope I'm alive 50 years from now, because that would be something to see!
all waves, all the time
From ScienceDaily: NASA's SkyView Delivers The Multiwavelength Cosmos
This article talks about SkyView, a nifty little tool from NASA that shows pictures of space, from many sources, at many wavelengths. Pretty and fun!
This article talks about SkyView, a nifty little tool from NASA that shows pictures of space, from many sources, at many wavelengths. Pretty and fun!
trust your gut
From ScienceDaily: http://www.sciencedaily.com/releases/2009/02/090208133221.htm
This study shows a "lucky guess" might be a lot less about luck and a lot less of a guess than we think.
Researchers at Northwestern University, led by psych professor Ken Paller, showed participants a variety of pictures: half they could pay their full attention to, the other half they were supposed to be listening and memorizing a number. And... "Remarkably, people were more accurate in selecting the old image when they had been distracted than when they had paid full attention. They also were more accurate when they claimed to be guessing than when they registered some familiarity for the image," Paller says. Even though splitting attention is supposed to worsen memory, the "visual system" was working as normal.
"The study suggests that we shouldn't rely only on conscious memory, Paller concludes. 'It suggests that we also need to develop our intuitive nature and creativity. Intuition may have an important role in finding answers to all sorts of problems in everyday life -- including big ones such as our ailing economy.'" Paller also talks about the need to further recognize and develop many types of intelligence.
This makes a lot of sense to me... I tend to remember things better when I'm not totally focused on one thing. That's why I like to doodle during lectures. (Also because otherwise I end up either daydreaming or trying not to fall asleep. Oh well.)
This study shows a "lucky guess" might be a lot less about luck and a lot less of a guess than we think.
Researchers at Northwestern University, led by psych professor Ken Paller, showed participants a variety of pictures: half they could pay their full attention to, the other half they were supposed to be listening and memorizing a number. And... "Remarkably, people were more accurate in selecting the old image when they had been distracted than when they had paid full attention. They also were more accurate when they claimed to be guessing than when they registered some familiarity for the image," Paller says. Even though splitting attention is supposed to worsen memory, the "visual system" was working as normal.
"The study suggests that we shouldn't rely only on conscious memory, Paller concludes. 'It suggests that we also need to develop our intuitive nature and creativity. Intuition may have an important role in finding answers to all sorts of problems in everyday life -- including big ones such as our ailing economy.'" Paller also talks about the need to further recognize and develop many types of intelligence.
This makes a lot of sense to me... I tend to remember things better when I'm not totally focused on one thing. That's why I like to doodle during lectures. (Also because otherwise I end up either daydreaming or trying not to fall asleep. Oh well.)
Friday, February 6, 2009
jellyfish galaxy
From ScienceDaily: Exceptionally Deep View Of Strange Galaxy
Really pretty pictures of an uncommon type of spiral galaxy in the Coma Cluster, which is about 321 million light years away and contains mostly elliptical galaxies. Around and even through it, "thousands of much more remote galaxies of all shapes, sizes and colours are visible. Many have the spotty and ragged appearance of galaxies at a time before the familiar division into spirals and ellipticals had become established."
Really pretty pictures of an uncommon type of spiral galaxy in the Coma Cluster, which is about 321 million light years away and contains mostly elliptical galaxies. Around and even through it, "thousands of much more remote galaxies of all shapes, sizes and colours are visible. Many have the spotty and ragged appearance of galaxies at a time before the familiar division into spirals and ellipticals had become established."
Wednesday, February 4, 2009
you scratch my back...
From ScienceDaily: Small Male Chimps Use Politics, Rather Than Aggression, To Lead The Pack
Pretty interesting. Scientists observed a smaller chimp leader "obsessively groom[ing] both male and female chimpanzees to maintain his top position." They also observed a very large and aggressive leader as being a "stingy groomer."
Pretty interesting. Scientists observed a smaller chimp leader "obsessively groom[ing] both male and female chimpanzees to maintain his top position." They also observed a very large and aggressive leader as being a "stingy groomer."
u.s. moving, brightening
From Scientific American: U.S. becomes top wind producer, solar next
Sweet! That means we're kind of awesome, right? Surpassing Germany on both counts!
I guess it helps that we have a ton of land that's windy and a couple deserts, too.
Sweet! That means we're kind of awesome, right? Surpassing Germany on both counts!
I guess it helps that we have a ton of land that's windy and a couple deserts, too.
the wester wing
From Vanity Fair: Portfolio: Enter Obama
This is just a fun photo series by Annie Leibovitz with a lot of Obama's high-level staff. Very natural but very Annie. I can't tell if the people who look distracted or busy actually are or if it's posed.
This is just a fun photo series by Annie Leibovitz with a lot of Obama's high-level staff. Very natural but very Annie. I can't tell if the people who look distracted or busy actually are or if it's posed.
too many babies
From BBC News: Population: The elephant in the room
From Dr. John Feeney comes an editorial about how our unchecked population growth will lead to a Malthusian catastrophe, and how environmentalists don't really like to talk about overpopulation and its control. I totally agree. It is an issue, and it is affecting our environment. Somewhere around 100 species go extinct every day, because we're converting biomass to human-mass (I stole that from Daniel Quinn, I'll admit). People are starving all over the plant, and they keeps getting food and more land gets converted, but they're still starving.
I think the taboo on the subject comes from a lot of things. First, of course, is that birth control is still a touchy subject, mostly because certain religious groups try to block access to it, especially to those who most need it, the poor. In the US, when the pill came out back in the '50s and then got really popular in the '60s, minority groups accused the government and Margaret Sanger (a birth control advocate who helped bring everything together in its creation) of eugenics and racism. On the part of Sanger, this is, unfortunately, true. But those who don't really have the means to support children probably shouldn't be having them. I don't know if we can erase poverty, but I can't imagine growing up in it will help break the cycle.
However, I also don't think rich people should be having a ton of kids just because they can, though I admit "a ton" is relative (some say one should be the limit, some say two, some say more). I've heard people give Angelina Jolie and Brad Pitt a hard time because they have something of a brood now, but I mean, they only had three; the other three are adopted. Nothing wrong with adopting. On the other hand, there is that woman in California who just had octuplets when she already had six kids because of some crazy fertility treatment; or that couple in Arkansas with 18 kids. I don't see how they can raise that many. My mother just had three, and even when she was a stay-at-home when we were young it seemed pretty stressful.
However, moving on. I think there's also an issue because the cultural meme is that women should be having children, preferably more than one. Women who don't want to have children get a lot of shit, as do women with only one. I feel like women who aren't sure if they want them or now feel like it's better to in case they regret it.
Last is that for a lot of women, especially in developing and third world countries (though definitely in developed, too!), it's not an issue of consensual sex. Where women are raped, or are given away in marriage forcefully or too young to really understand. I don't feel like in those cases it's a birth control access issue, or just that, it's a women's rights issue. It seems like women's rights is still somewhat controversial: in the US while Bush was in office, in parts of Africa, the Middle East, and I'm sure many other places around the world. I don't know how much birth control can help women who never really have any choice in the sex.
I don't know what the solution is. I mean, in a lot of ways, having children around is nice. I mean, we're wired to like babies. I have a niece, and she's adorable, and my sister makes an excellent mother; at this point, though, I'm not sure if I'll be having children. I'm 25, so I've got time to really decide. Part of me wants to; the other part of me realizes I have trouble taking care of plants. That part of me also thinks I shouldn't be contributing to the problem, and leave it to people like my sister who will actually do it well.
From Dr. John Feeney comes an editorial about how our unchecked population growth will lead to a Malthusian catastrophe, and how environmentalists don't really like to talk about overpopulation and its control. I totally agree. It is an issue, and it is affecting our environment. Somewhere around 100 species go extinct every day, because we're converting biomass to human-mass (I stole that from Daniel Quinn, I'll admit). People are starving all over the plant, and they keeps getting food and more land gets converted, but they're still starving.
I think the taboo on the subject comes from a lot of things. First, of course, is that birth control is still a touchy subject, mostly because certain religious groups try to block access to it, especially to those who most need it, the poor. In the US, when the pill came out back in the '50s and then got really popular in the '60s, minority groups accused the government and Margaret Sanger (a birth control advocate who helped bring everything together in its creation) of eugenics and racism. On the part of Sanger, this is, unfortunately, true. But those who don't really have the means to support children probably shouldn't be having them. I don't know if we can erase poverty, but I can't imagine growing up in it will help break the cycle.
However, I also don't think rich people should be having a ton of kids just because they can, though I admit "a ton" is relative (some say one should be the limit, some say two, some say more). I've heard people give Angelina Jolie and Brad Pitt a hard time because they have something of a brood now, but I mean, they only had three; the other three are adopted. Nothing wrong with adopting. On the other hand, there is that woman in California who just had octuplets when she already had six kids because of some crazy fertility treatment; or that couple in Arkansas with 18 kids. I don't see how they can raise that many. My mother just had three, and even when she was a stay-at-home when we were young it seemed pretty stressful.
However, moving on. I think there's also an issue because the cultural meme is that women should be having children, preferably more than one. Women who don't want to have children get a lot of shit, as do women with only one. I feel like women who aren't sure if they want them or now feel like it's better to in case they regret it.
Last is that for a lot of women, especially in developing and third world countries (though definitely in developed, too!), it's not an issue of consensual sex. Where women are raped, or are given away in marriage forcefully or too young to really understand. I don't feel like in those cases it's a birth control access issue, or just that, it's a women's rights issue. It seems like women's rights is still somewhat controversial: in the US while Bush was in office, in parts of Africa, the Middle East, and I'm sure many other places around the world. I don't know how much birth control can help women who never really have any choice in the sex.
I don't know what the solution is. I mean, in a lot of ways, having children around is nice. I mean, we're wired to like babies. I have a niece, and she's adorable, and my sister makes an excellent mother; at this point, though, I'm not sure if I'll be having children. I'm 25, so I've got time to really decide. Part of me wants to; the other part of me realizes I have trouble taking care of plants. That part of me also thinks I shouldn't be contributing to the problem, and leave it to people like my sister who will actually do it well.
Friday, January 30, 2009
just no genome compare and contrast essays, please
From ScienceDaily: New Computational Technique Allows Comparison Of Whole Genomes As Easily As Whole Books
Based on a word frequency technique used to compare and categorize texts, professor of chemistry at UC Berkley Sung-Hou Kim and a group of researchers have developed a method that allows the comparison of entire genomes of species. Up to this point, comparisons have only been done between exons, which are the sequences of DNA used by RNA to make proteins. They ran a comparison of 518 genomes; six were eukaryotes, two random, and the rest bacteria and archaea. The tool, the feature frequency profile (FFP) method, easily separated the examples into domains and fairly reliably into phyla and classes, "with some interesting discrepancies compared to the currently accepted groupings." Interestingly enough, "most" of those discrepancies involved species whose classifications are in dispute.
This sounds pretty amazing. Dr. Kim gives many fields where this method will help, but I think learning more about how species relate with each other is the most interesting thing. Previously I posted an article about how Darwin's Tree of Life doesn't really tell the whole story of evolution and the development of life. I can't wait to see what kind of awesome things they discover.
Based on a word frequency technique used to compare and categorize texts, professor of chemistry at UC Berkley Sung-Hou Kim and a group of researchers have developed a method that allows the comparison of entire genomes of species. Up to this point, comparisons have only been done between exons, which are the sequences of DNA used by RNA to make proteins. They ran a comparison of 518 genomes; six were eukaryotes, two random, and the rest bacteria and archaea. The tool, the feature frequency profile (FFP) method, easily separated the examples into domains and fairly reliably into phyla and classes, "with some interesting discrepancies compared to the currently accepted groupings." Interestingly enough, "most" of those discrepancies involved species whose classifications are in dispute.
This sounds pretty amazing. Dr. Kim gives many fields where this method will help, but I think learning more about how species relate with each other is the most interesting thing. Previously I posted an article about how Darwin's Tree of Life doesn't really tell the whole story of evolution and the development of life. I can't wait to see what kind of awesome things they discover.
hello nuclear power, goodbye nuclear waste
From ScienceDaily: Nuclear Fusion-fission Hybrid Could Contribute To Carbon-free Energy Future
This is pretty damn cool. Some scientists at the University of Texas at Austin have designed a fusion-fission hybrid that could help reduce nuclear plant waste up to 99%. Cheap nuclear power could help us with a lot of things, and one of the big issues with it is nuclear waste. Well, meltdowns are an issue, too, but there have only been two since we started using nuclear power, and the last one was more than two decades ago. It seems like they've made it a lot safer. (My internal pessimist is now telling me to build a shelter.)
This is pretty damn cool. Some scientists at the University of Texas at Austin have designed a fusion-fission hybrid that could help reduce nuclear plant waste up to 99%. Cheap nuclear power could help us with a lot of things, and one of the big issues with it is nuclear waste. Well, meltdowns are an issue, too, but there have only been two since we started using nuclear power, and the last one was more than two decades ago. It seems like they've made it a lot safer. (My internal pessimist is now telling me to build a shelter.)
Wednesday, January 28, 2009
isaac newbee
From ScienceDaily: Honey Bees Can Tell The Difference Between Different Numbers At A Glance
Wow. Honey bees can kind of count. "My colleague Professor Srinivasan has demonstrated that bees can count up to four landmarks on their way from their hive to a food source. This new research shows they can tell the difference between different numbers – even when we change the pattern, shape or the colour of the dots!" says Dr. Zhang with The Vision Center.
Wow. Honey bees can kind of count. "My colleague Professor Srinivasan has demonstrated that bees can count up to four landmarks on their way from their hive to a food source. This new research shows they can tell the difference between different numbers – even when we change the pattern, shape or the colour of the dots!" says Dr. Zhang with The Vision Center.
but is it golden??
From ScienceDaily: Personal Touch in Farming: Giving A Cow A Name Boosts Milk Production
Harvest Moon was right. Cows that have names and get some one-on-one attention have a higher milk yield. Now if only I could get the golden milk...
Harvest Moon was right. Cows that have names and get some one-on-one attention have a higher milk yield. Now if only I could get the golden milk...
"virtual conditioning"
From NewScientist: Video game conditioning spills over into real life
In this study, researchers at Cambridge had volunteers play a bicycle racing game in which they would get a swig of fruit juice if they were passed by a virtual teammate and a swig of "salty tea" if they were passed by a rival. A few days later, they were brought into a room where those logos were displayed on chairs. "Three-quarters of the subjects sat in the chair that reminded them of juice, though most participants said they did not notice the towel design." In addition, "under a functional-MRI brain scanner, an area involved in responses to bad tastes lit up when these same participants viewed a picture of the jersey linked to salty tea."
I was not surprised at all reading this story, and I doubt anyone who games even casually would be either. (At least I think that's all it would take.) Mostly I play RPGs, so I can't really feel any urge to slay all those monsters walking around or anything, but I recall a time of obsessive Puzzle Quest playing when I would unconsciously "match" tiles. It's weird what video games do to your brain. But I still love them. What else is my brain for if not to fill, condition, and manipulate?
In this study, researchers at Cambridge had volunteers play a bicycle racing game in which they would get a swig of fruit juice if they were passed by a virtual teammate and a swig of "salty tea" if they were passed by a rival. A few days later, they were brought into a room where those logos were displayed on chairs. "Three-quarters of the subjects sat in the chair that reminded them of juice, though most participants said they did not notice the towel design." In addition, "under a functional-MRI brain scanner, an area involved in responses to bad tastes lit up when these same participants viewed a picture of the jersey linked to salty tea."
I was not surprised at all reading this story, and I doubt anyone who games even casually would be either. (At least I think that's all it would take.) Mostly I play RPGs, so I can't really feel any urge to slay all those monsters walking around or anything, but I recall a time of obsessive Puzzle Quest playing when I would unconsciously "match" tiles. It's weird what video games do to your brain. But I still love them. What else is my brain for if not to fill, condition, and manipulate?
don't go overboard
From New Scientist: Human emissions could bring 'irreversible' climate chaos
First, let me say: I'm not a warming skeptic or anything like that. I think we need to stop polluting, being wasteful, and using fossil fuels. Now, preferably. It'll suck, but you can't keep shitting in your own bed without starting to feel pretty nasty.
However, I also think that articles like this are kind of... misleading, maybe? Or perhaps as short-sighted as people who don't want drastic changes to our environmental policies because short-term economic concerns.
Scientists are predicting that even if we stopped burning fossil fuels now, by the year 3000, CO2 levels "would still be around a third higher than pre-industrial levels."
Even if we can quickly switch over to alternative energies, no matter what we do, it's going to suck for people right now. It's going to suck for people for a while. But 1000 years isn't really that long. Yeah, I know it's what, 40 generations? But think 1000 years ago. Sure, we didn't have any of the sweet technology we do now, but a lot of our cultural roots were around then.
And think about it on a geological time scale. We're in the middle of a interglacial period of an ice age, a period that started about 12,000 years ago. The last interglacial period, which started about 130,000 years ago, lasted 20,000 years. According to Wikipedia, a scientist has predicted a warm period of at least another 50,000 years (because of low eccentricity of the Earth's orbit), but we really don't know.
Plus, crazy stuff always happens. For example: before about 50 million years ago, Earth was a lot warmer and wetter, and CO2 levels were some like ten times what they are now. Then, about 49 mya, a bunch of ferns pulled a lot of CO2 out of the atmosphere (Azolla event), eventually lowering the amount from ~3800 ppmv to ~100 ppmv. Earth started the ice age cycle it's going through today.
I'm a little unsure of my point, I think. It's not that we should forget about environmentalism or anything like that. The way we're doing things sucks, and if we want to stick around, we have to find better ways. I guess I'm just saying, we can't save the world. We can't save everything. We can't hold the world as it is. The Earth changes; we have to evolve to it, not the other way around.
I'm just afraid someone's going to do something crazy like try and pull all of the CO2 gases out of the air, and we'll end up in a glacial period again. We're not ready for that guys. I hate the cold.
First, let me say: I'm not a warming skeptic or anything like that. I think we need to stop polluting, being wasteful, and using fossil fuels. Now, preferably. It'll suck, but you can't keep shitting in your own bed without starting to feel pretty nasty.
However, I also think that articles like this are kind of... misleading, maybe? Or perhaps as short-sighted as people who don't want drastic changes to our environmental policies because short-term economic concerns.
Scientists are predicting that even if we stopped burning fossil fuels now, by the year 3000, CO2 levels "would still be around a third higher than pre-industrial levels."
Even if we can quickly switch over to alternative energies, no matter what we do, it's going to suck for people right now. It's going to suck for people for a while. But 1000 years isn't really that long. Yeah, I know it's what, 40 generations? But think 1000 years ago. Sure, we didn't have any of the sweet technology we do now, but a lot of our cultural roots were around then.
And think about it on a geological time scale. We're in the middle of a interglacial period of an ice age, a period that started about 12,000 years ago. The last interglacial period, which started about 130,000 years ago, lasted 20,000 years. According to Wikipedia, a scientist has predicted a warm period of at least another 50,000 years (because of low eccentricity of the Earth's orbit), but we really don't know.
Plus, crazy stuff always happens. For example: before about 50 million years ago, Earth was a lot warmer and wetter, and CO2 levels were some like ten times what they are now. Then, about 49 mya, a bunch of ferns pulled a lot of CO2 out of the atmosphere (Azolla event), eventually lowering the amount from ~3800 ppmv to ~100 ppmv. Earth started the ice age cycle it's going through today.
I'm a little unsure of my point, I think. It's not that we should forget about environmentalism or anything like that. The way we're doing things sucks, and if we want to stick around, we have to find better ways. I guess I'm just saying, we can't save the world. We can't save everything. We can't hold the world as it is. The Earth changes; we have to evolve to it, not the other way around.
I'm just afraid someone's going to do something crazy like try and pull all of the CO2 gases out of the air, and we'll end up in a glacial period again. We're not ready for that guys. I hate the cold.
Tuesday, January 27, 2009
we're not the boss of you now
From The New York Times: On Arab TV Network, Obama Urges Dialogue
Obama's first interview is with Dubai-based Al Arabiya. He strikes "a conciliatory tone toward the Islamic world, saying he wanted to persuade Muslims that 'the Americans are not your enemy.'" About the Israeli-Palestinian conflict, he says: "Ultimately, we cannot tell either the Israelis or the Palestinians what’s best for them. They’re going to have to make some decisions, but I do believe that the moment is ripe for both sides to realize that the path that they are on is not going to result in prosperity and security for their people. And that, instead, it’s time to return to the negotiating table."
This seems like a good move. He not only says, hey guys, we don't want to fight, let's talk about this, specifically to Iran, he also says, basically, that we can't tell you how to live, and if you disagree with me, I'm not going to call you a terrorist. I reserve that for those who actually killing civilians.
I'm glad. I don't want our country to be the boss. We don't know any better than anyone else. I'm glad we have a president now who recognizes that.
Obama's first interview is with Dubai-based Al Arabiya. He strikes "a conciliatory tone toward the Islamic world, saying he wanted to persuade Muslims that 'the Americans are not your enemy.'" About the Israeli-Palestinian conflict, he says: "Ultimately, we cannot tell either the Israelis or the Palestinians what’s best for them. They’re going to have to make some decisions, but I do believe that the moment is ripe for both sides to realize that the path that they are on is not going to result in prosperity and security for their people. And that, instead, it’s time to return to the negotiating table."
This seems like a good move. He not only says, hey guys, we don't want to fight, let's talk about this, specifically to Iran, he also says, basically, that we can't tell you how to live, and if you disagree with me, I'm not going to call you a terrorist. I reserve that for those who actually killing civilians.
I'm glad. I don't want our country to be the boss. We don't know any better than anyone else. I'm glad we have a president now who recognizes that.
Sunday, January 25, 2009
RNA is bi....directional?
From ScienceDaily: Rewrite the Textbooks: Transcription is Bidirectional
Scientists at the European Molecular Biology Lab in Germany have discovered that RNA transcription of DNA is bidirectional from promoters, as opposed to all transcription happening in one direction. DNA is still pretty mysterious, so even though this isn't as incredibly exciting as naked singularities or quantum communication, it's still good to know. Also, I can impress my biology professor. I like doing that.
Scientists at the European Molecular Biology Lab in Germany have discovered that RNA transcription of DNA is bidirectional from promoters, as opposed to all transcription happening in one direction. DNA is still pretty mysterious, so even though this isn't as incredibly exciting as naked singularities or quantum communication, it's still good to know. Also, I can impress my biology professor. I like doing that.
Saturday, January 24, 2009
too much gaming=not enough time for other things? really?
From ScienceDaily: Video Games Linked to Poor Relationships With Friends, Family
There's apparently a "modest" association between spending a lot of time playing video games and not-so-good relationships with friends and family. This made me laugh a little: "the student co-author expresses disappointment at his own findings." It's not really surprising, though. As much as I love gaming, doing it a lot (and it can be super-addictive!) can interfere with other parts of your life. I mean, you need to have a fairly balanced life, right? Doing work and/or school, taking care of yourself and your surroundings, socializing, and hobbies. Gaming is a hobby, and playing like 10 hours a day (more than very rarely, I'll say) can really cut into everything else.
There's apparently a "modest" association between spending a lot of time playing video games and not-so-good relationships with friends and family. This made me laugh a little: "the student co-author expresses disappointment at his own findings." It's not really surprising, though. As much as I love gaming, doing it a lot (and it can be super-addictive!) can interfere with other parts of your life. I mean, you need to have a fairly balanced life, right? Doing work and/or school, taking care of yourself and your surroundings, socializing, and hobbies. Gaming is a hobby, and playing like 10 hours a day (more than very rarely, I'll say) can really cut into everything else.
origins of the dark flow
From New Scientist: Dark flow: Proof of another universe?
First off: did you know 45 billion light years is the furthest we can observe from Earth? I did not, and I don't quite understand how considering the universe is only supposed to be a little less than 14 billion years old. (I've heard of inflation and all that, but I'm still boggled.)
Anyway, this is a pretty interesting article about something called dark flow. Apparently, a team from NASA led by Dr. Sasha Kashlinsky noticed that there are a lot of galaxy clusters (they were studying almost 800) "racing at up to 1000 kilometres per second" "toward a small patch of sky between the constellations of Centaurus and Vela." (They're southern constellations; take a look at this map around -40˚.) This is strange because galaxies and galaxies clusters should be moving along with the expansion of space. Kashlinsky thinks something on the "cosmic horizon" is causing this, where conditions could be totally different from what they are in the observable universe, where matter and energy are fairly evenly distributed.
Other theories: "the dark flow is caused by other universes exerting a gravitational pull on galaxy clusters in our universe[;]" "dark flow could be a sign that our bubble universe crashed into another bubble just after the big bang[;]" or that the current cosmological model is wrong, matter is not evenly distributed, and "that at large scales matter is like a fractal."
It makes me a little sad that we might never know.
First off: did you know 45 billion light years is the furthest we can observe from Earth? I did not, and I don't quite understand how considering the universe is only supposed to be a little less than 14 billion years old. (I've heard of inflation and all that, but I'm still boggled.)
Anyway, this is a pretty interesting article about something called dark flow. Apparently, a team from NASA led by Dr. Sasha Kashlinsky noticed that there are a lot of galaxy clusters (they were studying almost 800) "racing at up to 1000 kilometres per second" "toward a small patch of sky between the constellations of Centaurus and Vela." (They're southern constellations; take a look at this map around -40˚.) This is strange because galaxies and galaxies clusters should be moving along with the expansion of space. Kashlinsky thinks something on the "cosmic horizon" is causing this, where conditions could be totally different from what they are in the observable universe, where matter and energy are fairly evenly distributed.
Other theories: "the dark flow is caused by other universes exerting a gravitational pull on galaxy clusters in our universe[;]" "dark flow could be a sign that our bubble universe crashed into another bubble just after the big bang[;]" or that the current cosmological model is wrong, matter is not evenly distributed, and "that at large scales matter is like a fractal."
It makes me a little sad that we might never know.
Friday, January 23, 2009
entangled quantumly
From Scientific American: Quantum Entanglement Benefits Exist after Links Are Broken, Quantum Leap: Information Teleported between Ions at a Distance
Two really interesting articles on quantum entanglement. According to wikipedia, quantum entanglement is "a quantum mechanical phenomenon in which the quantum states of two or more objects are linked together so that one object can no longer be adequately described without full mention of its counterpart — even though the individual objects may be spatially separated."
In the first article, Seth Lloyd, a quantum physicist at MIT, discovers that there is some sort of lingering connection between particles even after they've disentangled. By applying this, he developed the idea of quantum illumination, where something (a camera, satellite, x-ray machine, whatever), could entangle photons and send one set to the object being sensed, with the other set being used for reference, so that when the returning photons bring information back, any noise created by any unrelated photons could be filtered out. And, "[i]f quantum illumination works, Lloyd suggests it could boost the sensitivity of radar and x-ray systems as well as optical telecommunications and microscopy by a millionfold or more."
The second article describes how researchers, led by Stephen Olmschenk, a grad student at UMD College Park, "succeeded in teleporting quantum information between ytterbium ions (charged atoms) three feet (one meter) apart." The article describes the process:
Two really interesting articles on quantum entanglement. According to wikipedia, quantum entanglement is "a quantum mechanical phenomenon in which the quantum states of two or more objects are linked together so that one object can no longer be adequately described without full mention of its counterpart — even though the individual objects may be spatially separated."
In the first article, Seth Lloyd, a quantum physicist at MIT, discovers that there is some sort of lingering connection between particles even after they've disentangled. By applying this, he developed the idea of quantum illumination, where something (a camera, satellite, x-ray machine, whatever), could entangle photons and send one set to the object being sensed, with the other set being used for reference, so that when the returning photons bring information back, any noise created by any unrelated photons could be filtered out. And, "[i]f quantum illumination works, Lloyd suggests it could boost the sensitivity of radar and x-ray systems as well as optical telecommunications and microscopy by a millionfold or more."
The second article describes how researchers, led by Stephen Olmschenk, a grad student at UMD College Park, "succeeded in teleporting quantum information between ytterbium ions (charged atoms) three feet (one meter) apart." The article describes the process:
Information is teleported from one ion to another by encoding quantum information onto the first ion. Once the ion is entangled with another, the state of each ion is indefinite until the first one is measured—an action that projects the other ion into one of two states. Conventional (nonquantum) communication channels relay information, gleaned from the first ion's measurement, as to which of those two states is correct, and a pulse of microwave energy sets the second ion into the state representing the information encoded on the first.What peaked my interest about this (besides it being awesomely cool) was a couple of sci-fi books I read a few years ago, Metaplanetary (2001) and Superluminal (2004) by Tony Daniel, which are set in the future where quantum communication is the basis for society and technology. Great books. Anyway, the thought of actually applying quantum entanglement and communication to real technology is awesome. We will never know everything.
Wednesday, January 21, 2009
a web, note a tree
From New Scientist: Why Darwin was wrong about the tree of life
Growing evidence is showing Darwin's idea of life as a growing, branching tree is too simple by spades, mostly because of RNA and DNA research. This article goes into detail about endosymbiosis and the development of eukaryotic cells, horizontal gene transfer, viable hybrids, and DNA implantation by viruses. There's even the discussion of the possibility that animals with distinct and completely different larvae and adult stages could be the descendants of two very different species. Very interesting.
Growing evidence is showing Darwin's idea of life as a growing, branching tree is too simple by spades, mostly because of RNA and DNA research. This article goes into detail about endosymbiosis and the development of eukaryotic cells, horizontal gene transfer, viable hybrids, and DNA implantation by viruses. There's even the discussion of the possibility that animals with distinct and completely different larvae and adult stages could be the descendants of two very different species. Very interesting.
indecent singularities
From Scientific American: Do Naked Singularities Break the Rules of Physics?
In this article, Dr. Pankaj Joshi at the Tata Institute of Fundamental Research in Mumbai discusses the possibility of naked singularities. (I know that sounds a little naughty, but bear with me, because it actually is thrilling in its own way.) Naked singularities are basically black holes, without an event horizon. So, there would be a point of infinity density without the same effect on gravity; there would not be the same "point of no return" as there is with black holes. In addition, if naked singularities do exist, it would be possible for them to be observed directly. Theoretical models seem to show that with a certain inhomogeneity of density in a star, this type of singularity could be formed.
In this article, Dr. Pankaj Joshi at the Tata Institute of Fundamental Research in Mumbai discusses the possibility of naked singularities. (I know that sounds a little naughty, but bear with me, because it actually is thrilling in its own way.) Naked singularities are basically black holes, without an event horizon. So, there would be a point of infinity density without the same effect on gravity; there would not be the same "point of no return" as there is with black holes. In addition, if naked singularities do exist, it would be possible for them to be observed directly. Theoretical models seem to show that with a certain inhomogeneity of density in a star, this type of singularity could be formed.
the womb of the big bang
From Scientific American: The First Stars in the Universe
And now back to your regularly scheduled science.
I've been reading a lot of these "story of a theory" type articles a lot in the past few days. I like them because they're easier to understand as a layperson, which I guess makes sense because they're actually stories that are coming from mainstream science magazines.
Anyway, this article is, just as it says, about the first stars in the universe. How they formed, how long ago, how massive they were. Answers: possibly small variations in density, between 100 and 250 million years after the Big Bang, and between 300 and 1000 solar masses.
And now back to your regularly scheduled science.
I've been reading a lot of these "story of a theory" type articles a lot in the past few days. I like them because they're easier to understand as a layperson, which I guess makes sense because they're actually stories that are coming from mainstream science magazines.
Anyway, this article is, just as it says, about the first stars in the universe. How they formed, how long ago, how massive they were. Answers: possibly small variations in density, between 100 and 250 million years after the Big Bang, and between 300 and 1000 solar masses.
45 minutes on 1/20/09
I live pretty close to DC, but I didn't go into town for the Inauguration yesterday. Even though I'm very happy Obama is our President, something about braving bitter cold in the pre-dawn hours with a million other people made me want to curl up in front of my TV with a blanket and hot cup of tea instead.
One of the things I like about Obama (that he has been criticized for) is his professorness. When he speaks, he doesn't bite off clips for the news to play over and over. He doesn't play to people's knee-jerking instincts, though he does try to sway emotions. I feel like he's giving the benefit of the doubt to us, the American people. His speeches are to intelligent people, and it seems like he's willing to work a little harder to treat us like actual reasoning beings instead of basically saying, "Because I said so," and "It's good for you." His speeches aren't sentences and seconds; they're paragraphs, essays, many moments together.
I thought that could sum up the Inauguration itself (I didn't follow the parade or balls or anything, except to check out Michelle Obama's dress, of course). It was very powerful, and I enjoyed it for the most part. Aretha's performance was grand as always (perhaps not her strongest ever, but she looked great and it was very emotional), and I loved the quartet performance of Air and Simple Gifts. However, I thought Elizabeth Alexander's poetry reading was kind of a dud. From her bio, it seems like she's a decorated writer, so maybe she just psyched herself up too much.
Being fairly agnostic, state-led prayers can be a little annoying to me, but getting a non-pinko shoutout from Obama helped. Also, a great deal of the country is Christian or otherwise religious, and there are better battles to pick. That said, I thought Rick Warren's invocation fell pretty flat. I understand what Obama was trying to do. I just think it kind of sucked. Like, he was pulling it all out of his ass. Or he cut out pieces from a bunch of different sermons and speeches, put them in a hat, and picked out some. On the other hand, I really liked Rev. Joseph Lowery's Benediction. It was moving and a little humorous, and that Lowery was a civil rights activist gave kind of a nice "full circle" feel.
I thought Obama's Address was excellent. I've read some criticism that he wasn't very hopeful; some wanted more specific policy ideas; it was "good but not great."
For the first, I can understand that point. He's been pointing out for a while that the economic situation will get worse before it gets better. And I mean, who's denying that? It took almost a decade-and-a-half with World War II for the country to recover from the Great Depression. Things aren't as bad as they were when FDR took office, but these things don't just resolve themselves overnight. I like to think that when Obama is saying "hope," he's not saying, "I'm a superhero; I'm your saviour; I will fix all problems and everything will be peachykeen and you can start buying too much crap again." He's saying, "This way isn't working, and with that idea in your leader, together we can all change ourselves, the way we live and thus the world." Things can't go back to the way they were; it's unsustainable economically. We need to move forward, try to rid ourselves of the idea that everything's about more and better stuff, stop sacrificing the future for the present. And it's going to suck for a lot of people, because when Obama said, "We will not apologize for our way of life, nor will we waver in its defense," he didn't mean it in the same way that Cheney did when he said, "The American way of life is non-negotiable."
Anyway, for the second, I really don't see how anything specific would have added to it. Obama isn't just trying to make and change laws; he wants to add fuel to the fire of ideas. Plus, he's pretty much been talking all along of what he's going to do, on his website, with Congress, and in his "fireside chats."
And the last... I don't really know what the NYT wanted. Angel choirs, the area to suddenly become a warm beach, with unicorns running around, I don't know. As I mentioned earlier, anyone who's ever heard an Obama speech knows he's not good for a soundbite. No "nothing to fear but fear itself" or "ask not what your country can do for..." Let's wait a decade or two and wait for history and quote books to decide, though, all right?
Anyway, what he does is just as important as what he says. And I'm happy what he's done so far, so we'll just have to see how this goes.
One of the things I like about Obama (that he has been criticized for) is his professorness. When he speaks, he doesn't bite off clips for the news to play over and over. He doesn't play to people's knee-jerking instincts, though he does try to sway emotions. I feel like he's giving the benefit of the doubt to us, the American people. His speeches are to intelligent people, and it seems like he's willing to work a little harder to treat us like actual reasoning beings instead of basically saying, "Because I said so," and "It's good for you." His speeches aren't sentences and seconds; they're paragraphs, essays, many moments together.
I thought that could sum up the Inauguration itself (I didn't follow the parade or balls or anything, except to check out Michelle Obama's dress, of course). It was very powerful, and I enjoyed it for the most part. Aretha's performance was grand as always (perhaps not her strongest ever, but she looked great and it was very emotional), and I loved the quartet performance of Air and Simple Gifts. However, I thought Elizabeth Alexander's poetry reading was kind of a dud. From her bio, it seems like she's a decorated writer, so maybe she just psyched herself up too much.
Being fairly agnostic, state-led prayers can be a little annoying to me, but getting a non-pinko shoutout from Obama helped. Also, a great deal of the country is Christian or otherwise religious, and there are better battles to pick. That said, I thought Rick Warren's invocation fell pretty flat. I understand what Obama was trying to do. I just think it kind of sucked. Like, he was pulling it all out of his ass. Or he cut out pieces from a bunch of different sermons and speeches, put them in a hat, and picked out some. On the other hand, I really liked Rev. Joseph Lowery's Benediction. It was moving and a little humorous, and that Lowery was a civil rights activist gave kind of a nice "full circle" feel.
I thought Obama's Address was excellent. I've read some criticism that he wasn't very hopeful; some wanted more specific policy ideas; it was "good but not great."
For the first, I can understand that point. He's been pointing out for a while that the economic situation will get worse before it gets better. And I mean, who's denying that? It took almost a decade-and-a-half with World War II for the country to recover from the Great Depression. Things aren't as bad as they were when FDR took office, but these things don't just resolve themselves overnight. I like to think that when Obama is saying "hope," he's not saying, "I'm a superhero; I'm your saviour; I will fix all problems and everything will be peachykeen and you can start buying too much crap again." He's saying, "This way isn't working, and with that idea in your leader, together we can all change ourselves, the way we live and thus the world." Things can't go back to the way they were; it's unsustainable economically. We need to move forward, try to rid ourselves of the idea that everything's about more and better stuff, stop sacrificing the future for the present. And it's going to suck for a lot of people, because when Obama said, "We will not apologize for our way of life, nor will we waver in its defense," he didn't mean it in the same way that Cheney did when he said, "The American way of life is non-negotiable."
Anyway, for the second, I really don't see how anything specific would have added to it. Obama isn't just trying to make and change laws; he wants to add fuel to the fire of ideas. Plus, he's pretty much been talking all along of what he's going to do, on his website, with Congress, and in his "fireside chats."
And the last... I don't really know what the NYT wanted. Angel choirs, the area to suddenly become a warm beach, with unicorns running around, I don't know. As I mentioned earlier, anyone who's ever heard an Obama speech knows he's not good for a soundbite. No "nothing to fear but fear itself" or "ask not what your country can do for..." Let's wait a decade or two and wait for history and quote books to decide, though, all right?
Anyway, what he does is just as important as what he says. And I'm happy what he's done so far, so we'll just have to see how this goes.
Monday, January 19, 2009
life's first environment?
From New Scientist: Did life begin in a pool of acidic gloop?
This article reads less like a piece on a study and more like a story - the story of a hypothesis. The writer, Douglas Fox, describes time spent with David Deamer, biochemist with University of California, Santa Cruz. Deamer is trying to figure out what type of environment nurtured the first amino acids and genetic material into being. He believes that a geothermally active muddy sulfuric soup like that found in Bumpass Hell in Lassen Volcanic National Park, CA is the right place to look. A great read.
This article reads less like a piece on a study and more like a story - the story of a hypothesis. The writer, Douglas Fox, describes time spent with David Deamer, biochemist with University of California, Santa Cruz. Deamer is trying to figure out what type of environment nurtured the first amino acids and genetic material into being. He believes that a geothermally active muddy sulfuric soup like that found in Bumpass Hell in Lassen Volcanic National Park, CA is the right place to look. A great read.
m theory, dark matter, and a phoenix universe
From New Scientist: Did dark energy give us our cosmos?
This theory puts together a couple of my favorite ideas. First, in M theory, our universe is just a part of a larger structure. The article talks about it "exists on a 3D region called a 'brane' separated from similar branes by a fourth spatial dimension." Sometimes, these branes collide, causing something like the big bang. Next, the universe is in a never-ending cycle of bang, expansion, and then contraction. (I like this because not only does it answer the question of what came before the big bang, but it also eliminates eternal expansion and eternal death of heat, light, etc., which scares me in a way it shouldn't considering I won't live that long.)
The problem with this idea is that all the different parts of the extended 'verse would have to move to fit expanding and contracting branes, so "large areas of the brane become warped, so that most of it ends up as black holes and only a tiny proportion as ordinary, habitable space." But! Add the element of dominant, pervasive dark matter, and the theory starts to come together. Sweet.
This theory puts together a couple of my favorite ideas. First, in M theory, our universe is just a part of a larger structure. The article talks about it "exists on a 3D region called a 'brane' separated from similar branes by a fourth spatial dimension." Sometimes, these branes collide, causing something like the big bang. Next, the universe is in a never-ending cycle of bang, expansion, and then contraction. (I like this because not only does it answer the question of what came before the big bang, but it also eliminates eternal expansion and eternal death of heat, light, etc., which scares me in a way it shouldn't considering I won't live that long.)
The problem with this idea is that all the different parts of the extended 'verse would have to move to fit expanding and contracting branes, so "large areas of the brane become warped, so that most of it ends up as black holes and only a tiny proportion as ordinary, habitable space." But! Add the element of dominant, pervasive dark matter, and the theory starts to come together. Sweet.
blowing my mind
From New Scientist: Our world may be a giant hologram
I can't even begin to talk about this crazy, amazing research. So I'll just quote from the article.
I can't even begin to talk about this crazy, amazing research. So I'll just quote from the article.
For the past seven years, this German set-up has been looking for gravitational waves - ripples in space-time thrown off by super-dense astronomical objects such as neutron stars and black holes. GEO600 has not detected any gravitational waves so far, but it might inadvertently have made the most important discovery in physics for half a century.I can't decide if I'm freaked out, or amazed, or both.
For many months, the GEO600 team-members had been scratching their heads over inexplicable noise that is plaguing their giant detector. Then, out of the blue, a researcher approached them with an explanation. In fact, he had even predicted the noise before he knew they were detecting it. According to Craig Hogan, a physicist at the Fermilab particle physics lab in Batavia, Illinois, GEO600 has stumbled upon the fundamental limit of space-time - the point where space-time stops behaving like the smooth continuum Einstein described and instead dissolves into "grains", just as a newspaper photograph dissolves into dots as you zoom in. "It looks like GEO600 is being buffeted by the microscopic quantum convulsions of space-time," says Hogan.
If this doesn't blow your socks off, then Hogan, who has just been appointed director of Fermilab's Center for Particle Astrophysics, has an even bigger shock in store: "If the GEO600 result is what I suspect it is, then we are all living in a giant cosmic hologram."
Saturday, January 17, 2009
hey guys, let's get along. c'mon, s'mores.
From BBC News: Israel 'to announce Gaza truce'
That's good. But Hamas says that Israeli troops have to leave Gaza and the blockade has to be lifted for them to honor a ceasefire. Wonder if that'll happen? The Israelis say they'll strike back if attacked.
I'm so glad I don't live in a place of constant warfare.
That's good. But Hamas says that Israeli troops have to leave Gaza and the blockade has to be lifted for them to honor a ceasefire. Wonder if that'll happen? The Israelis say they'll strike back if attacked.
I'm so glad I don't live in a place of constant warfare.
dynamic evolution
From ScienceDaily: Evolutionary Process More Detailed Than Previously Believed, Study Shows
In observing yeast cells, scientists have realized that evolution doesn't happen in a straight line. The common model is that more useful mutations will disseminate through a population before developing further adaptations. However, Dr. Katy Kao at Texas A&M University and Dr. Gavin Sherlock at Stanford have realized that "evolutionary process [is] much more dynamic than initially thought." They witnessed separate yeast populations with different beneficial mutations compete with each other. One population that was almost eliminated for being less competitive was able mutate just in time to save itself.
Pretty interesting. With all those pictures of the lineage of species showing straight or forked lines, I definitely thought species moved as a whole or just eventually became other species. Now, it seems silly to think that there could only be one mutation at a time.
In observing yeast cells, scientists have realized that evolution doesn't happen in a straight line. The common model is that more useful mutations will disseminate through a population before developing further adaptations. However, Dr. Katy Kao at Texas A&M University and Dr. Gavin Sherlock at Stanford have realized that "evolutionary process [is] much more dynamic than initially thought." They witnessed separate yeast populations with different beneficial mutations compete with each other. One population that was almost eliminated for being less competitive was able mutate just in time to save itself.
Pretty interesting. With all those pictures of the lineage of species showing straight or forked lines, I definitely thought species moved as a whole or just eventually became other species. Now, it seems silly to think that there could only be one mutation at a time.
meaningless day of meaningless
From Politico: Bush: 'Sanctity of Human Life Day'
Oh, oh! Next can we have 'Sanctity of My Vagina Day'? How about 'Everybody Dances Naked in the Street Day'? How about a day where we mock our most pointless, divisive, and incompetent public figures? Oh, I think that's every day. Sorry, man.
Oh, oh! Next can we have 'Sanctity of My Vagina Day'? How about 'Everybody Dances Naked in the Street Day'? How about a day where we mock our most pointless, divisive, and incompetent public figures? Oh, I think that's every day. Sorry, man.
science is a hardcore gamer
From ScienceDaily: Video Game Players Love the Game, Not the Gore
Hey guys! Most of us gamers really aren't sociopathic and blood-thirsty. We just like the challenge. Well, there are some people, but they were more aggressive anyway. Science is on our side. It loves us. Science is a gamer.
Hey guys! Most of us gamers really aren't sociopathic and blood-thirsty. We just like the challenge. Well, there are some people, but they were more aggressive anyway. Science is on our side. It loves us. Science is a gamer.
game theory the agony aunt
From ScienceDaily: Game Theory Explains Why You Can't Hurry Love
Mathematics, Dear Abby, and my mother agree: it's better to wait to commit in a relationship. Apparently waiting out the honeymoon phase is a solid mathematical principal, now. Randall Munroe at XKCD must be thrilled.
Mathematics, Dear Abby, and my mother agree: it's better to wait to commit in a relationship. Apparently waiting out the honeymoon phase is a solid mathematical principal, now. Randall Munroe at XKCD must be thrilled.
whoops, you pissed off the turks
From BBC News: Turkey rallies to Gaza's plight
Turkey is pissed about Israel bombing relief facilities in the Gaza Strip, too.
Israel wonders why people don't try to put pressure on the Hamas to put an end to the conflict.
Maybe because you're blocking aid to Gaza and destroying food, water, and medical supplies? Just saying.
Turkey is pissed about Israel bombing relief facilities in the Gaza Strip, too.
Israel wonders why people don't try to put pressure on the Hamas to put an end to the conflict.
Maybe because you're blocking aid to Gaza and destroying food, water, and medical supplies? Just saying.
mars, dead or alive?
From ScienceDaily: Mars May Still Be A Living Planet, Methane in Atmosphere Reveals
Scientists have discovered that methane is being released on Mars, which means something interesting is going on there, whether geological or biological. Apparently, it's a lot of methane, too.
Scientists have discovered that methane is being released on Mars, which means something interesting is going on there, whether geological or biological. Apparently, it's a lot of methane, too.
"Methane is quickly destroyed in the Martian atmosphere in a variety of ways, so our discovery of substantial plumes of methane in the northern hemisphere of Mars in 2003 indicates some ongoing process is releasing the gas," said Michael Mumma of NASA's Goddard Space Flight Center in Greenbelt, Md. "At northern mid-summer, methane is released at a rate comparable to that of the massive hydrocarbon seep at Coal Oil Point in Santa Barbara, Calif."
Friday, January 16, 2009
just like momma macaque
From ScienceDaily: Primate Culture Is Just a Stone's Throw Away From Human Evolution, Study Finds
I like it when animals are smarter than we think they are. Elephants self-recognizing, birds remembering if they've been spied stashing food, monkeys and apes using tools. And I think at least some animals feel. Maybe their emotions aren't as deep or varied as humans, but my cat gets jealous and feels content, and my dog gets lonely and becomes pleased.
According to this articles, scientists have been observing Japanese macaques for three decades. These monkeys... well, the article calls it "stone-handling," but considering it specifically describes them as "rubbing and clacking stones together, pounding them onto hard surfaces, picking them up, and cuddling, carrying, pushing, rolling and throwing them," I would just call it playing. And interestingly enough, researchers at the Primate Research Institute have found that mother macaques who play with stones more have children that spend more time with them, presumably because "the mothers' frequent stone-handling caught the infants' attention, and as a result, the infants acquired the behavior more quickly than other infants."
How cute. Baby monkeys want to be just like their parents.
Though I've read that a child's fascination for what adults and especially its parents are doing is coded in. Maybe that's why toy versions of adult equipment, like play stoves, are so popular. Pretty interesting stuff.
I like it when animals are smarter than we think they are. Elephants self-recognizing, birds remembering if they've been spied stashing food, monkeys and apes using tools. And I think at least some animals feel. Maybe their emotions aren't as deep or varied as humans, but my cat gets jealous and feels content, and my dog gets lonely and becomes pleased.
According to this articles, scientists have been observing Japanese macaques for three decades. These monkeys... well, the article calls it "stone-handling," but considering it specifically describes them as "rubbing and clacking stones together, pounding them onto hard surfaces, picking them up, and cuddling, carrying, pushing, rolling and throwing them," I would just call it playing. And interestingly enough, researchers at the Primate Research Institute have found that mother macaques who play with stones more have children that spend more time with them, presumably because "the mothers' frequent stone-handling caught the infants' attention, and as a result, the infants acquired the behavior more quickly than other infants."
How cute. Baby monkeys want to be just like their parents.
Though I've read that a child's fascination for what adults and especially its parents are doing is coded in. Maybe that's why toy versions of adult equipment, like play stoves, are so popular. Pretty interesting stuff.
quantum hindsight got contacts
From ScienceDaily: Physicists Resolve Confounding Paradox Of Quantum Theory
Science is fun, especially quantum theory (nice I'm saying that when I really don't understand it, huh?). One of the things early quantum physicists discovered is that observing particles move changes how they act. (Check out this awesome video describing the "double slit experiment" performed in the 1920s. It's very easy to understand and features a superhero scientist. Sweet.)
So, according to this article, in the '90s people started thinking they could measure particles without interacting with them, "[b]ut when Lucien Hardy proposed that one could never reliably make inferences about past events which hadn't been directly observed, a paradox emerged which suggested that whenever one attempted to reason about the past in this way they would be led into error." So hindsight is blind?
However, scientists at the University of Toronto combined the ideas of "interaction-free measurement" with something call weak measurement, "a tool whereby the presence of a detector is less than the level of uncertainty around what is being measured, so that there is an imperceptible impact on the experiment."
I have to say, I don't understand the specifics. (I really need to take some college-level physics.) But, it basically sounds to me like scientists will now be able to see what particles are doing when they're supposed to be acting like matter but are pretending to be energy. And then for the why. Then maybe the why of particles getting stage fright?
Science is fun, especially quantum theory (nice I'm saying that when I really don't understand it, huh?). One of the things early quantum physicists discovered is that observing particles move changes how they act. (Check out this awesome video describing the "double slit experiment" performed in the 1920s. It's very easy to understand and features a superhero scientist. Sweet.)
So, according to this article, in the '90s people started thinking they could measure particles without interacting with them, "[b]ut when Lucien Hardy proposed that one could never reliably make inferences about past events which hadn't been directly observed, a paradox emerged which suggested that whenever one attempted to reason about the past in this way they would be led into error." So hindsight is blind?
However, scientists at the University of Toronto combined the ideas of "interaction-free measurement" with something call weak measurement, "a tool whereby the presence of a detector is less than the level of uncertainty around what is being measured, so that there is an imperceptible impact on the experiment."
I have to say, I don't understand the specifics. (I really need to take some college-level physics.) But, it basically sounds to me like scientists will now be able to see what particles are doing when they're supposed to be acting like matter but are pretending to be energy. And then for the why. Then maybe the why of particles getting stage fright?
dark matter close to home?
From Scientific American: Does Dark Matter Encircle Earth?
Just like scientists, I think dark matter is awesome, both because it is incredibly mysterious and because it apparently goes through normal matter. And its mysteriousness is apparently only equal to our inability to find any of it.
However, Stephen Adler, a theoretical physicist at the Institute for Advanced Studies, has said there should be study of the Earth and Moon to see if any dark matter is present close by. "If the mass of Earth and the moon when measured together seems greater than their masses separately, the difference could be attributed to a halo of dark matter in between." He says that the presence of dark matter in the solar system could also solve the unexplained on other planets, like how the interiors of the outer gas giants are hotter than we think they should be.
Annika Peter, an astrophysicist at CIT, counters, saying that the latter idea would require "a seriously unrealistic amount of dark matter," and that there probably isn't any dark matter in the solar system itself. But perhaps a little outside it?
Just like scientists, I think dark matter is awesome, both because it is incredibly mysterious and because it apparently goes through normal matter. And its mysteriousness is apparently only equal to our inability to find any of it.
However, Stephen Adler, a theoretical physicist at the Institute for Advanced Studies, has said there should be study of the Earth and Moon to see if any dark matter is present close by. "If the mass of Earth and the moon when measured together seems greater than their masses separately, the difference could be attributed to a halo of dark matter in between." He says that the presence of dark matter in the solar system could also solve the unexplained on other planets, like how the interiors of the outer gas giants are hotter than we think they should be.
Annika Peter, an astrophysicist at CIT, counters, saying that the latter idea would require "a seriously unrealistic amount of dark matter," and that there probably isn't any dark matter in the solar system itself. But perhaps a little outside it?
out of line
From Al Jazeera: Israel shells hospital, UN compound
This is horrible. "[T]housands and thousands of tonnes of food, medical supplies and other emergency assistance are there."
I understand the Israelis want to cut down on the weapons going into Palestinian Gaza, but destroying medical facilities and neutral UN aid is unacceptable.
I know Barack Obama has indicated he will give at least some support to Israel. But he really needs to take a hard line on this conflict. I definitely don't have any suggestions (I still don't even understand why we and the UN thought it was a good idea to just take someone's country and give it to someone else in the first place), but something concilitory needs to happen there.
This is horrible. "[T]housands and thousands of tonnes of food, medical supplies and other emergency assistance are there."
I understand the Israelis want to cut down on the weapons going into Palestinian Gaza, but destroying medical facilities and neutral UN aid is unacceptable.
I know Barack Obama has indicated he will give at least some support to Israel. But he really needs to take a hard line on this conflict. I definitely don't have any suggestions (I still don't even understand why we and the UN thought it was a good idea to just take someone's country and give it to someone else in the first place), but something concilitory needs to happen there.
not a path, a field
From Salon: Since You Asked: I'm wandering the halls of life on a visitor's pass
I have a weakness for advice columns. I think Cary Tennis is a bit hit-or-miss, but I really liked this one from 1/15/09. The letter writer says she feels aimless. She doesn't know what to do with her life. She has been trying to be "pragmatic" and find her path, but it's not working.
Cary says:
I have a weakness for advice columns. I think Cary Tennis is a bit hit-or-miss, but I really liked this one from 1/15/09. The letter writer says she feels aimless. She doesn't know what to do with her life. She has been trying to be "pragmatic" and find her path, but it's not working.
Cary says:
Of course this "approach" doesn't "work." That's not how the universe is structured, my friend. We don't "work" it. It isn't something we control and manage. That's a view of reality based in the industrial world, and the world is not industrial. It is in fact magical and mysterious and if you don't do something soon it is all going to be over and none of this will have mattered and you will have run around trying to fix something that can't be fixed and trying to control something that can't be controlled and create some kind of world that can't be created because you, my friend, are not in control of these things, and all these people you see around you who seem to have it together have no better idea than you do how to actually live a meaningful life, but what they do have is some prior operant conditioning that took well, and the good luck to have fallen onto this mottled surface more or less shaped according to the slots currently existing for them, which is fine if you want comfort and a good slot to fit in. But otherwise what good are they going to do? What are they going to discover, what are they going to create, and why are they going to go through their whole lives having never glimpsed the existential terror that you, my courageous voyager into the heart of the beautiful and terrifying and meaningless, have made yourself contentedly comfortable with (as comfortable as one can be with the screamingly terrifying and chaotic knowledge of the void)?Most people don't know what they're doing.
too much coffee
From BBC News: 'Vision link' to coffee intake
Researchers at Durham University have discovered that excessive coffee drinking (seven cups a day) can lead to hallucinations. Seriously, that's a lot of coffee. I don't know anyone who drinks that much. Crazy javafiends.
Researchers at Durham University have discovered that excessive coffee drinking (seven cups a day) can lead to hallucinations. Seriously, that's a lot of coffee. I don't know anyone who drinks that much. Crazy javafiends.
gifted children and how I came to hate the rote
From ScienceDaily: Education Professor Dispels Myths About Gifted Children
Dr. Steven Pfeiffer, a professor and psychologist at Florida State, says in this study that gifted children really do need some sort of "special needs" program in order to reach their potential. He also says there needs to be more effort to identify gifted children. For a long time, "schools used one measure, the IQ test," but the traditional IQ test doesn't measure all the nuances of intelligence. In addition to measuring traditional intellectual and academic ability, creativity, artistic talent, leadership, and motivation should also be taken into consideration.
I agree with him on all accounts. When I was in high school, I knew several very smart kids who didn't do well mostly because they were bored (I was one of them; though I'll let you decide how smart I am). Though I don't think the whole "different kinds of intelligence" thing is very new. I remember in a high school psych class we discussed the different types of intelligence (which included inter- and intrapersonal communication, too, but I guess those could fall under leadership and motivation).
I don't like our current one-size-fits all school system. Everybody learns at different speeds and in different things; everybody's interested in different things; everybody has different strengths, weaknesses, and goals (though I don't know how clear those goals are at a young age. but I know I wanted to be an architect in my "tween" years, so it can't all be rock or sport stars). I also wish subjects weren't so cut and dry. It wasn't until I started taking college classes that I realized how interconnected disciplines are.
For example, I'm reading a book about the history and philosophy of zero. (Zero: the Biography of a Dangerous Idea by Charles Seife, if you're interested.) I never knew before that this mathematical concept and its philosophical equivalent of the void was extremely controversial in Europe because of reigning Aristotelian views that were enforced by the Church. (Aristotle believed the world was static and all space was filled, which went in line nicely with the Christian belief that God created a perfect world very recently and that the Earth is the center of the universe.) This is why when calendars were created during the Middle Ages, there was no year 0 representing the birth of Christ, and why centuries and millenia start on year 1 rather than 0. When the concept of 0 started taking hold of Europe during the Renaissance, not only were there huge advances in science and mathematics (solving Zeno's paradox, calculus, calculating tangent), the idea of the void allowed artists to finally develop true perspective. And now we are able to accept that the universe is expanding.
Philosophy should be a required course in secondary school, I think.
Anyway, I think if there was more emphasis on how different fields affect each other, and how they affect a person, regular students would have find school more interesting, as well as being more prepared for college or work or tech school or life.
Dr. Steven Pfeiffer, a professor and psychologist at Florida State, says in this study that gifted children really do need some sort of "special needs" program in order to reach their potential. He also says there needs to be more effort to identify gifted children. For a long time, "schools used one measure, the IQ test," but the traditional IQ test doesn't measure all the nuances of intelligence. In addition to measuring traditional intellectual and academic ability, creativity, artistic talent, leadership, and motivation should also be taken into consideration.
I agree with him on all accounts. When I was in high school, I knew several very smart kids who didn't do well mostly because they were bored (I was one of them; though I'll let you decide how smart I am). Though I don't think the whole "different kinds of intelligence" thing is very new. I remember in a high school psych class we discussed the different types of intelligence (which included inter- and intrapersonal communication, too, but I guess those could fall under leadership and motivation).
I don't like our current one-size-fits all school system. Everybody learns at different speeds and in different things; everybody's interested in different things; everybody has different strengths, weaknesses, and goals (though I don't know how clear those goals are at a young age. but I know I wanted to be an architect in my "tween" years, so it can't all be rock or sport stars). I also wish subjects weren't so cut and dry. It wasn't until I started taking college classes that I realized how interconnected disciplines are.
For example, I'm reading a book about the history and philosophy of zero. (Zero: the Biography of a Dangerous Idea by Charles Seife, if you're interested.) I never knew before that this mathematical concept and its philosophical equivalent of the void was extremely controversial in Europe because of reigning Aristotelian views that were enforced by the Church. (Aristotle believed the world was static and all space was filled, which went in line nicely with the Christian belief that God created a perfect world very recently and that the Earth is the center of the universe.) This is why when calendars were created during the Middle Ages, there was no year 0 representing the birth of Christ, and why centuries and millenia start on year 1 rather than 0. When the concept of 0 started taking hold of Europe during the Renaissance, not only were there huge advances in science and mathematics (solving Zeno's paradox, calculus, calculating tangent), the idea of the void allowed artists to finally develop true perspective. And now we are able to accept that the universe is expanding.
Philosophy should be a required course in secondary school, I think.
Anyway, I think if there was more emphasis on how different fields affect each other, and how they affect a person, regular students would have find school more interesting, as well as being more prepared for college or work or tech school or life.
Thursday, January 8, 2009
pear-shaped
From Scientific American: Are fat bums a sign of good health?
Harvard Medical School has done studies showing that having a "pear-shape," with fat on the thighs and butt, might actually be helpful in preventing diabetes 2. Subcutaneous fat is a layer of fat everyone has right under the skin (it also helps keep you warm). The bad type of body fat is visceral fat, which accumulates in the abdomen between organs and gives that beer belly.
Like it says in the article, not all fat is bad.
Harvard Medical School has done studies showing that having a "pear-shape," with fat on the thighs and butt, might actually be helpful in preventing diabetes 2. Subcutaneous fat is a layer of fat everyone has right under the skin (it also helps keep you warm). The bad type of body fat is visceral fat, which accumulates in the abdomen between organs and gives that beer belly.
Like it says in the article, not all fat is bad.
real live levitation!
From ScienceDaily: Levitation At Microscopic Scale Could Lead To Nanomechanical Devices Based On Quantum Levitation
Scientists at Harvard have discovered that by applying the Casimir effect, they could get a metal plate to float a microscopic distance off another type of metal plate.
Scientific levitation. Based on quantum mechanics. The world gets more and more exciting. These types of experimentation and discoveries are why I don't think that science and spirituality are opposed. I just think that some things are too big for us to understand, sort of like a bacteria trying to understand the known universe or the solar system. Though hey... maybe bacteria are extremely philosophical. I really don't know. I haven't talked to my bacteria lately. Just like "true" reality, reality as a whole, god or whatever you want to call it, hasn't talked to me lately, either.
Scientists at Harvard have discovered that by applying the Casimir effect, they could get a metal plate to float a microscopic distance off another type of metal plate.
Scientific levitation. Based on quantum mechanics. The world gets more and more exciting. These types of experimentation and discoveries are why I don't think that science and spirituality are opposed. I just think that some things are too big for us to understand, sort of like a bacteria trying to understand the known universe or the solar system. Though hey... maybe bacteria are extremely philosophical. I really don't know. I haven't talked to my bacteria lately. Just like "true" reality, reality as a whole, god or whatever you want to call it, hasn't talked to me lately, either.
Wednesday, January 7, 2009
all grown up and making carbon monoxide
From Scientific American: Did the universe mature at an early age?
More discoveries about the early universe, this time about two billion years after the Big Bang, or whatever beginning it was, which is about 11.5 billion years ago.
I guess maybe a lack of galactic collisions. A little peace and quiet.
More discoveries about the early universe, this time about two billion years after the Big Bang, or whatever beginning it was, which is about 11.5 billion years ago.
[A]stronomers announced that cosmic gas in that period, seen when backlit by a gamma-ray burst (a gigantic stellar explosion), contained molecular hydrogen and carbon monoxide—the first time astronomers have discovered molecules, as opposed to isolated atoms or ions, in the light of a gamma-ray burst. The molecules’ presence indicates that the galaxy where the burst occurred was nearly as chemically developed as the present-day Milky Way.I'm curious now... theoretically, there was very, very little metal in the beginning of the universe, and so the earliest stars should have no metal (called Population III or metal-free stars, you can read about this at the Metallicity article are Wikipedia). Wikipedia says (I know Wikipedia can be a little dicey, but for basics like this I think it's ok) that "theory is divided on whether the first stars were very massive or not," but considering everything was just masses of light gases expanding, I think they must have been massive, and thus had very quick life cycles and pumped out a lot of new elements. And since this new evidence is showing that chemically, the universe is pretty similar 11.5 billion years ago as it is now, does that mean that there is the slim possibility that life could have formed anytime since then? I mean, life on Earth needed, what? Earth itself. So iron, nickel, other metals, and other heavier elements. Hydrogen and carbon monoxide means our basic organic building blocks were there - carbon and water. What else does life need?
I guess maybe a lack of galactic collisions. A little peace and quiet.
what came first?
From BBC News: Black holes 'preceded galaxies'
It was unclear whether black holes came first, helping create galaxies by pulling matter towards them, or whether they arose in already formed galaxies.This is pretty interesting. The infancy of the universe is a mysterious time. I guess this makes sense, though. The universe was much smaller at around 1 billion years old. Maybe those metal-poor stars back then were the same way today's metal-rich stars are: lots of different sizes and masses, and some of them had to become black holes and then pull matter and stars to themselves as the universe expanded.
"It looks like the black holes came first," said Dr Chris Carilli, from the US National Radio Astronomy Observatory in Socorro, New Mexico, who took part in the study. "The evidence is piling up."
Tuesday, January 6, 2009
anti-apple
From Science Daily: Possible Abnormality In Fundamental Building Block of Einstein's Theory of Relativity
I think this article is about how scientists don't take gravity seriously because it's a weak force. I liked it just because it contained the phrase "an apple and an anti-apple."
I think this article is about how scientists don't take gravity seriously because it's a weak force. I liked it just because it contained the phrase "an apple and an anti-apple."
one for the other
From ScienceDaily: Mothers Pass On Disease Clues To Offspring
Apparently in many species, when females are pregnant and they might get ill, they produce less aggressive male offspring with a better immune system, and "[t]he results of this new study support the existence of a ‘trade off’ between social dominance and disease resistance."
Ha! So see, my desire for a less aggressive mate makes sense. Better disease resistance to pass down. Fuck social dominance, those assholes.
Apparently in many species, when females are pregnant and they might get ill, they produce less aggressive male offspring with a better immune system, and "[t]he results of this new study support the existence of a ‘trade off’ between social dominance and disease resistance."
Ha! So see, my desire for a less aggressive mate makes sense. Better disease resistance to pass down. Fuck social dominance, those assholes.
reality has become a little more virtual
From ScienceDaily: Reality Gets Hyperlinked and Snap, Map, Chat And Hyperlink
These two articles are about a new, usable, and totally awesome technology from Europe, where you can take a picture of a building or landmark in a city and get whatever local information you want - history, shopping, entertainment, dining, whatever.
I love the idea of a mixed or augmented reality. I like the idea of blurring the lines between reality and virtuality. I don't think virtuality has to necessarily be "fantasy," (because if you cuss out your friend on WoW then they're still going to be pissed) but... I don't know, it's just awesome! I'm definitely not one of those need-new-toys-contantly types, but this is something I would want and use, partly because I like the idea of being able to pull information from anywhere.
These two articles are about a new, usable, and totally awesome technology from Europe, where you can take a picture of a building or landmark in a city and get whatever local information you want - history, shopping, entertainment, dining, whatever.
I love the idea of a mixed or augmented reality. I like the idea of blurring the lines between reality and virtuality. I don't think virtuality has to necessarily be "fantasy," (because if you cuss out your friend on WoW then they're still going to be pissed) but... I don't know, it's just awesome! I'm definitely not one of those need-new-toys-contantly types, but this is something I would want and use, partly because I like the idea of being able to pull information from anywhere.
Saturday, January 3, 2009
video games for life
From Scientific American: Using virtual worlds and video games to teach the lessons of reality
I love the idea of a virtual interactive world to help kids learn. I guess I'm somewhat biased, being both an avid gamer and an avid youthful educational gamer (yes, I will destroy these robots with my amazing math and history skills many times). Is it bad that River City sounds super-interesting, and I really want to play it? I'm still in school...
I love the idea of a virtual interactive world to help kids learn. I guess I'm somewhat biased, being both an avid gamer and an avid youthful educational gamer (yes, I will destroy these robots with my amazing math and history skills many times). Is it bad that River City sounds super-interesting, and I really want to play it? I'm still in school...
dryas the younger
From The New York Times: New Evidence of Meteor Bombardment
This article is about how scientists have found more evidence that the most recent ice age was caused by meteors a little under 13,000 years ago.
That cold spell is called the Younger Dryas, which I have to say, sounds like a name from a fantasy novel:
"I will avenge my father!" cried the younger Dryas, and glaring into the eyes of the undead mage, drew the Meteor sword smelted by his father, the older Dryas.
Yes? Yes? Ok, maybe it's just me.
This article is about how scientists have found more evidence that the most recent ice age was caused by meteors a little under 13,000 years ago.
That cold spell is called the Younger Dryas, which I have to say, sounds like a name from a fantasy novel:
"I will avenge my father!" cried the younger Dryas, and glaring into the eyes of the undead mage, drew the Meteor sword smelted by his father, the older Dryas.
Yes? Yes? Ok, maybe it's just me.
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