Showing posts with label Learning English with Science 科學英語. Show all posts
Showing posts with label Learning English with Science 科學英語. Show all posts

Aug 16, 2014

Cubelets: Small Robots Teach Big Science Lessons


Transcript:

These simple robotic cubes are the building blocks of intelligent systems

Cubelets are magnetic, electronic building blocks, each with a small computer inside, that can be connected in many different ways to move around a table, follow a hand signal, turn on a light, play sounds, or do many other creative tasks.

They were developed by Eric Schweikardt and his team at Modular Robotics, with support from the National Science Foundation's (NSF) Small Business Innovation Research (SBIR) program.

"Cubelets come in three categories: sense, think and act. That's our working definition of a robot--any mechanical device that senses, thinks and acts," says Schweikardt.

"Cubelets are an example of a complex system. They're made of lots of little cubes--each with a different capability, such as a distance sensor cube, a drive motor cube with wheels and a battery cube. And, when you put them together, they do something greater, such as drive when they detect an object," he continues. "They're inspired by natural systems of individuals that join forces and work together, such as insect swarms or birds flying in a 'V' formation."

These 21st century building blocks are meant to help kids learn about the basics of robotics while boosting their confidence to solve problems.

"Cubelets, by Modular Robotics, make powerful ideas of computational thinking accessible in a fun and hands-on way to students of all ages," says NSF program manager Glenn Larsen. "The next generation of citizens needs to understand complex systems like our ecosystem and our economy. Cubelets lays the foundation for this understanding by putting the building blocks of complex systems in children's hands."

Miles O'Brien, Science Nation Correspondent
Marsha Walton, Science Nation Producer

Jan 25, 2014

The Discovery Files:Tomato Tweak

Researchers at Cold Spring Harbor Laboratory have found a way to allow commercial tomato growers to coax their plants into producing more fruit without sacrificing the unique and necessary bushy shape of the plants.

Credit: NSF/Karson Productions






Audio Transcript:

Yield--for tomatoes.

I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.

1908: New York State's Cold Spring Harbor Laboratory. Botanist George Shull (shool), discovers that cross-breeding genetically distinct plants produces offspring more robust than either inbred parent. A phenomenon called 'hybrid vigor,' that's been used to improve agricultural productivity for over a century--even though scientists couldn't agree on exactly how or why it worked.

Fast-forward to Cold Spring Harbor today, where researchers have found a way to coax tomato plants into producing more fruit, while still keeping a compact, bushy plant shape that allows mechanical harvesters to reap the crop.

Previously, the team had ID'ed a rare example of hybrid vigor involving a change in the gene that makes florigen, a hormone in charge of flowering and flower production. Now, they've found that the genetic change lowers the amount of florigen in tomato plants causing the plants to postpone the moment when they stop producing flowers. Result: Super-productive plants!

The researchers predict it may be possible to tweak florigen levels to get even higher yields--not just in tomatoes, but in other flowering plants as well.

The next time you enjoy a B.L.T.[1], think of the researchers at Cold Spring Harbor Lab, a group of 'budding geniuses.'

"The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Note:

[1]B.L.T.
Bacon, Lettuce, and Tomato the name of a sandwich that contains these foods.

Nov 10, 2012

Mount St. Helens: Rising From the Ashes


Life erupts once again from the once lifeless mountain

When Mount St. Helens blew its top in 1980, it wasn't a surprise that it happened, but even today the extent of the damage is hard to fathom. The eruption knocked down 100-foot trees like matchsticks and killed just about everything in its path. There have been several smaller eruptions since then, but nothing like what happened in 1980.

Evolutionary biologist and ecologist John Bishop knows Mount St. Helens well; he has been working on the mountain for 20 years. "It began with the largest landslide in recorded history that uncorked an explosion that was directed horizontally and leveled the forest 13 miles out," recalls Bishop. "It was just a barren landscape, gray-and-pumice-colored, covered with rocks."
Today, dead tree trunks still litter the landscape. But, if you take a closer look, you'll see another kind of eruption; an eruption of life on the mountainside. For Bishop, it's a blessing. "It's a rare opportunity for scientists to get to study a devastated area and how it comes back from scratch in such detail," he says.

With help from the National Science Foundation (NSF), Bishop is documenting the return of living things to the once lifeless mountain. "Up until the last 10 years, the landscape has been completely dominated by lupins," says Bishop. He says these flowering lupin plants are able to create new soil from volcanic ash. That new soil has created a habitat for the Sitka willow. But, Bishop says there is a problem. "One of the things we've realized about these willows is that they're not getting big. And that's important because they create habitat for birds and mammals."

The culprits are small invasive weevils that are on the attack. They've taken up residence inside the willows' stems, stunting the plants' growth or killing them. Bishop says there is a lesson in all of this. "Seemingly insignificant organisms, like insects that consume plants, play an extraordinarily important role in the sorting out process of deciding, essentially, which plants are going to stay in the landscape and which ones are going to disappear."

Bishop points out that the imbalance between plants and insects on Mount St. Helens should be expected in rudimentary systems and will cause instability until a more complex community of plant and animal species is sustainable, or until the day Mount St. Helens itself changes the equation once again.

Aug 7, 2012

Curiosity Has Landed on Mars



Transcript:

Things are looking good. Coming up on entry.

Vehicle reports entry interface.

We're beginning to feel the atmosphere as we go in here. Alright, it is reporting that

we are seeing G's on the order of 11 or 12 Earth G's.

Bank reversal 2 is starting (cheering). We are now getting telemetry from Odyssey.

We should have parachute deploy around Mach 1.7.

Parachute has deployed (cheering).

We are decelerating.

Heat shield has separated, we are locked on the ground.

We're down to 90 meters per second at an altitude of 6.5 kilometer descending.

Standing by for backshell separation.

We are in powered flight (cheering).

We're at an altitude of 1 km descending.

Standing by for sky crane. Sky crane has started

Signal from Odyssey remains strong.

Touchdown confirmed. We're safe on Mars (loud, sustained cheering).

We got thumbnails (cheering).

Aug 2, 2012

What's Up for August 2012?



Transcript:

What's Up for August? View Mars as the rover Curiosity lands on its surface this month.

Hello and welcome. I'm Jane Houston Jones at NASA's Jet Propulsion Laboratory in Pasadena, California.

On August 5 at 10:31 p.m. Pacific time NASA's Mars rover named Curiosity will touch down in Gale Crater. The best time to view Mars this month is right after sunset. Saturn, Mars and the bright star Spica [1] form a trio almost all month long. Look low in the west, 30 degrees above the horizon. You should be able to see the difference in color between the three. Saturn appears golden. Spica is blue-white. And Mars is rusty red.

On the 21st the moon joins the lineup.

On the night of the 5th, Mars sets a few hours after sunset everywhere in the U.S.
You can find a Mars viewing party on this night by checking with your local planetarium, science center or astronomy club. If you get a chance to view Mars through a telescope on that night, you might be able to see the dark Martian feature called Syrtis Major [2] near the center of the planet.

Although you can't see Gale Crater, Curiosity's landing site, through the telescope, it's near the limb to the east of Syrtis Major that night.

On the opposite limb is the rover Opportunity, who's been exploring Mars since 2004.
The most popular meteor shower of the year, the Perseids [3], peaks on a summer weekend Saturday night through Sunday morning, August 11th and 12th.

The constellation Perseus [4] rises in the northeast soon after sunset. Just follow the Milky Way from the south to the north to find it.

You'll see dozens of fast, bright meteors, some leaving persistent trains or smoky trails.

You can find information about Curiosity's landing at www.nasa.gov/mars and jpl.nasa.gov/mars. And look for MarsCuriosity on Twitter and Facebook.

You can learn about all of NASA's missions at www.nasa.gov.

That's all for this month. I'm Jane Houston Jones.

-----------------
Notes:

[1] Spica 角宿一

[2] Syrtis Major
It is a "dark spot" located in the boundary between the northern lowlands and southern highlands of Mars. For more information, visit at http://en.wikipedia.org/wiki/Syrtis_Major_Planum

[3] Perseids 英仙座流星雨

[4] Perseus 英仙座

Jul 10, 2012

The Discovery Files: Sleep Study

Want to nail that tune that you've practiced and practiced? Maybe take a nap with the same melody playing during your sleep, provocative Northwestern University research suggests.

Credit: NSF/Karson Productions





Audio Transcript:

To sleep--perchance to learn

I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.

A Northwestern University study has participants sleeping during class. Specifically, testing the effects of brain stimulation during sleep on skill enhancement. Participants were given two simple random melodies to learn to play on a key press. After working on the task, they were allowed a 90-minute nap. As subjects entered the stage of sleep associated with cementing memories the "slow wave"[1] stage, researchers played one of the tunes in their ears, but not the other. Could these external cues enhance learning? The researchers say, 'yes' noting that afterward, when asked to recall the tunes, participants made fewer errors in the sequence that was presented during sleep.

Does this mean you could, say, learn a new language while you sleep? Not really. The findings show you must study and learn the language first. But stimulation during sleep does seem to provide enhanced memory of a skill you have already recently learned. So you may be able to reinforce those language skills.

The team is thinking about ways their findings could apply to other types of learning as well, such as different types of motor skills, habits and behaviors.

Seems like the only skill I've improved on while sleeping is sleeping itself.

"The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] slow wave
Sleep is divided into two types: rapid eye movement (REM) and non-rapid eye movement (NREM). NREM is further divided into four stages. Stage 3 and stage 4 are similar and both fall into the category of slow wave sleep. They are deep sleep stages.

Read more: http://en.wikipedia.org/wiki/Non-rapid_eye_movement_sleep

Apr 27, 2012

Leaf-cutter Ants

Farmers, pharmacists and energy experts!
Leaf-cutter ants put on quite a show.




In established colonies, millions of "workers" cut and carry sections of leaves larger than their own bodies as part of a well choreographed, highly functioning society.

"Anyone who has ever come across a trail of ants cutting leaves and watched that trail run through the forest can recognize how charismatic, and what kind of large impact they have on the tropical ecosystems in which they occur," says bacteriologist Cameron Currie.

With support from the National Science Foundation (NSF), Currie and his team study ants and their complex, productive societies to help address some of human society's most pressing challenges, such as better drugs and cleaner energy.

But for Currie, the research is more than just finding solutions to problems. "My doctoral work on leaf-cutting ants was not from an 'Oh, we can discover enzymes for bio-energy,' or 'Oh, we can discover antibiotics for medicinal use.' It was from a fascination with understanding the interaction of organisms in the natural world," says Currie from his lab at the University of Wisconsin-Madison.

For example, these ants may have been the planet's first farmers. The insects chew up the leaves they cut and integrate them into a fungus garden, which then becomes both their food and their living space. This "mutualism" between the ants and the fungus was discovered in the late 1800s.

In the wild, primarily in Central and South America, large colonies may have as many as five to 10 million workers, with up to seven different castes, or job categories. Different-sized animals do different tasks. The queen, far larger than the others, may lay 50 million eggs over a lifetime. Soldiers protect the nest; workers gather leaf material. "Minima" or smaller workers are specialized for moving around in the small spaces of the fungus garden.

"This includes elaborate behaviors for tending their food crop. So, they actually groom it, and clean it, and prune it," explains Currie.

There is also a specialized group of ants that are the trash workers, who carry the old garden material and put it in specialized refuse dumps.

A third "player" is also crucial in this symbiotic city.

Bacteria found on the bodies of the ants produce antibiotics that help maintain the health of the fungus garden. "Our current evidence indicates that the ants have been dealing with diseases in their fungus gardens for millions of years," says Currie.

Over the years, these bacteria appear to have evolved new antibiotics to keep the gardens healthy. This co-evolution could help researchers create new antibiotics for humans.

Energy experts

Leaf-cutter ants are also adept teachers in energy research. The Currie Lab works with a wide range of experts at the Great Lakes Bioenergy Research Center (GLBRC), a multi-institutional partnership at the University of Wisconsin-Madison working to create fuel from the non-edible parts of plants, known as cellulosic ethanol.

"Our understanding of the process of breaking down that plant material to produce digestible nutrients for the ants is very limited," says Currie.

Figuring out how the ants do it could lead to cleaner replacements for petroleum.

"We hope to both reduce society's dependence on fossil fuels and generate those fuels from a feedstock that isn't part of the food chain," explains Tim Donohue, professor of bacteriology and director of GLBRC. "We think biofuels have a clear position in replacing the fossil fuels that go into the automotive and aviation sector, and we hope that we'll be able to generate fuels that are efficient, cost effective, [and] equally important, sustainable, from an economic and environmental perspective."

GLBRC is supported by the office of science in the U.S. Department of Energy. Donohue says the success of this renewable energy work could also provide farmers and foresters with a second revenue stream from their agricultural products; essentially another income from what is now a waste product.

Still fun to watch!

The nonstop work of these social insects can be mesmerizing to just about anyone who observes them. There's a display of a live leaf-cutter community in the lobby of the Microbial Sciences Building on the Madison campus, and an Ant Cam.

"The display is really a great thing for education," says Joseph Moeller, a lab technician in the Currie Lab. "We have lots of people of all ages, always interested in the types of things these leaf-cutter ants can do, and interested in how we travel down to Panama and Costa Rica to collect these ants to come back and study them."

For Currie, who has had his share of bites from angry "soldiers" over the years, the discoveries never get old.

"Working on leaf-cutter ants, doing field work is a major passion," he says. "The connection of seeing your study organism in the field, what it is doing, watching the ants carry leaves, it's captivating, and very exciting seeing the ants in their ecosystem, and their role and their function."

Miles O'Brien, Science Nation Correspondent
Marsha Walton, Science Nation Producer

Feb 28, 2012

The Discovery Files: Past Restored?

Wetland restoration is a billion-dollar-a-year industry in the United States that aims to create ecosystems similar to those that disappeared over the past century. But a new analysis of restoration projects shows that restored wetlands seldom reach the quality of a natural wetland.

Credit: NSF/Karson Productions




Audio Transcript:

Carbon Blueprint.

I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.

(Sound effect: wetlands) America's wetlands--ecological treasure troves of biodiversity. Keys to carbon storage, water purification, erosion control and fish production. During the last century, over half the wetlands in North America, Europe, China and Australia have disappeared at the hands of humans. A study out of UC-Berkeley shows that often the only way to restore wetlands to their original quality is not to destroy them in the first place.

But what about the long-established practice of "wetland restoration?" You know, destroy a natural wetland area through land development, and build a new man-made wetland to take its place. Sounds like a fair trade-off. But the authors of this study show that there may be some serious flaws in that logic.

They say a restored wetland may look natural, but it can take hundreds of years before it accumulates the plant varieties and carbon resources of the original it was meant to replace. On average, a restored wetland is 25 percent less productive than a natural one and in colder climes, as much as 50 percent less even after more than 50 years.

(Sound effect: wetlands) The theory that we can create wetland ecosystems as effectively as nature--may be "all wet."[1]

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] all wet
Completely wrong, mistaken.

Nov 21, 2011

The Discovery Files: Convincing Evidence

Want to convince someone to do something? A University of Michigan study examines how various speech characteristics influence people's decisions to participate in telephone surveys. But its findings have implications for many other situations, from closing sales to swaying voters to getting spouses to see things your way.

Credit: NSF/Karson Productions




Audio Transcript:

It's Not Always What You Say, It's How You Say It.

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

From convincing your spouse to closing a sale, researchers at the University of Michigan have identified some speech characteristics that may help your success ratio.

The team broke down 1,380 phone calls made by 100 male and female interviewers trying to convince people to participate in a telephone survey. Here are the findings -- which may not always work, but could give you a better overall chance.

Speed: Interviewers who spoke moderately fast (about 3½ words per second or the pace I'm speaking now) had better luck; any faster and you come off as untrustworthy; slower and you seem unsure, not too bright.

Liveliness:The team found that too many inflections make you sound fake or like you're trying too hard.

Pitch: Depends on if you're a man or a woman. Men with higher-pitched voices fared worse than men with deep voices. With women, pitch was not a factor.

The last characteristic was pauses. The least successful interviewers had no pauses and came off sounding scripted. Pausing a lot did better but tended to make the speaker sound uninformed. The right amount of pauses seems to be about 4 or 5 per minute.

Now using these guidelines get out there and talk someone into something. Some "convincing" evidence.

The Discovery Files: Power Grab

Researchers have discovered a way to capture and harness energy transmitted by such sources as radio and television transmitters, cell phone networks and satellite communications systems.

Credit: NSF/Karson Productions




Audio Transcript:

(Sound effect: Electronic sucking sound)Power Grab[1]. (Sound effect: theme music) I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

Shhhh. Can you hear it? Do you feel it all around you? Probably not, but it's there, (Sound effect: light hum and buzz of many radio, telephone, and electrical sources fades in) ambient energy. You know, the electromagnetic energy emitted by cell phone and radio and TV towers even satellite systems. It's just coursing through the air.

Researchers at Georgia Tech have discovered a way to harvest and store ambient energy. In order to be able to pick from the many frequency ranges, the team used an ultra-wideband antenna that can get everything from FM radio to radar signals. Their scavenging devices capture, then convert the power from AC to DC, and store it in capacitors or batteries.

(Sound effect: hair dryer)Now you're not gonna exactly going to be running your hairdryer with ambient power just yet. More likely small electronic devices like sensors and microprocessors.

The team is using inkjet printers to "print" sensors, antennas and energy-capture capabilities on paper or flexible polymer material. Imagine wireless, self-powered sensors in airport security for detection, monitoring temperature and humidity throughout your home, in buildings and bridges to warn of structural problems, even as inexpensive food-spoilage detectors and (Sound effect: beeping from medial machine) wearable bio-monitors that observe patient medical issues.

All powered with energy harvested in an electromagnetic field. Sort of a high-tech dream-catcher[2].

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] power grab
The original meaning means the attempt or action of acquiring or accomplishing something that was previously unattainable but is now possible through newly acquired power. However, here the word "power" indicates electrical energy.

[2] dream-catcher
A Native American craftwork consisting of a small hoop covered with string, yarn, or horsehair mesh and decorated with feathers and beads and believed to give its owner good dreams.

Nov 20, 2011

The Discovery Files: Stress Test

In her research, University of Chicago associate professor in psychology Sian Beilock, has shown the brain can work to sabotage performance, often in pressure-filled situations that deplete brain power critical to many everyday activities.

Credit: NSF/Karson Productions




Audio Transcript:

Stress for Success.

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

(Sound effect: college classroom sound)"Ok, listen up, 'cause there's going to be a test." Those words can send students everywhere into a panic. It seems for some, no matter how much they've studied, the stress of the test can get the best of them -- while others appear to thrive on it.

Sian Beilock (see-on bye-lock) and her research team at the University of Chicago gave 73 undergrads a stressful math test and measured two things: the students' working memory, how well they temporarily manage and store information and their level of math anxiety -- or fear about doing math. (Sweaty palms anyone?)

(Audio: Sian Beilock)"We have a variety of brain and body reactions under pressure in stressful situations but what our research shows is that it's not so much about these bodily reactions, but how you interpret them whether you interpret them as a sign you're going to succeed, or a sign that you're ready for failure that predicts whether you thrive or dive in the pressure-filled situation."

The research honed in on cortisol[1], "the stress hormone." If you're a student with a large working memory but with a fear of math, rising cortisol levels can lead you to choke. No fear of math? The more your cortisol goes up, the more your test score might, too. So change your perspective, and you might just change your grade. One caveat: you still have to know the material -- a point worth "stressing."

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] cortisol
腎上腺皮質素 An adrenal-cortex hormone. For more information, please refer to the following links: http://en.wikipedia.org/wiki/Cortisol
http://www.symcl.com.tw/check_single.php?tname=B&sno=122
http://www.wretch.cc/blog/teenty/20474731

Oct 31, 2011

The Discovery Files: Power Nap

A new "subconscious mode" for smartphones and other WiFi-enabled mobile devices could extend battery life by as much as 54 percent for users on the busiest networks.

Credit: NSF/Karson Productions




Audio Transcript:

(Sound effect: Smart phone ring) A Smarter Smart Phone.

(Sound effect: theme music) I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.

When your smart phone is waiting for your next hookup, it's on alert looking for messages and searching for clear communication channels. Did you know that it could be using as much power then as when it's sending and receiving messages? Researchers at the University of Michigan are working to make that idle time a lot less of a drain.

Meet "E-MILI," which stands for "Energy Minimizing Idle Listening." A way to have smart phones go into a slower, deeper mode of sleep, but still be ready to jump to full power when needed. The team believes that by using this new technology most smart phones could still keep one eye open for incoming messages while using as much as 44% less power.

E-MILI slows the clock in your Wi-Fi card to one-sixteenth of its normal frequency, that's easy, the hard part is to get the phone to recognize incoming messages while almost in a coma, so it can jolt back to full speed. Their solution was to get it to recognize just the headers of incoming messages. So they found a new way to encode the address header. To do this, it's going to require firmware modifications by the Wi-Fi chipset manufacturers, as well as getting the makers of smart phones onboard to install the chips in new phones. The project is in the proof-of-concept stage and could be reality soon.

Smart phones taking a real "power nap" -- would that make them "sleeper cells?[1]"

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] sleeper cells
It is used as a pun here. Sleeper cells originally means secret people who receive specialized training in their home countries and are then assigned to assimilate into another country's culture and society. These sleeper cells may spend years performing their regular duties while living deep undercover, then suddenly receive orders from their overseas handlers to either commit an act of terrorism or provide aid to those who will.

Oct 29, 2011

The Discovery Files: Game Changer

The Discovery Files: Game Changer[1]
Gamers have solved the structure of a retrovirus enzyme whose configuration had stumped scientists for more than a decade. The gamers achieved their discovery by playing Foldit, an online game that allows players to collaborate and compete in predicting the structure of protein molecules.

Credit: NSF/Karson Productions




Audio Transcript:

(Sound effect: online gaming sounds)High-stakes Gamers[2].
(Sound effect: theme music)

I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.

Here's a first--online gamers have solved a molecular biology problem in just 3 weeks, one that scientists couldn't unravelin 10 years. The project is the brainchild of scientists at the University of Washington Department of Biochemistry and the UW Center for Game Science.

The mission was to model the structure of a retrovirus enzyme from an aids-like virus. If scientists can determine its structure, they'll be better able to create anti-aids drugs to deactivate it. For over a decade, the usual methods of solving the puzzle were tried but science couldn't get a handle on what the enzyme's structure looked like.

The team turned to an unlikely group--online gamers. Reasoning that human intuition is something computers don't have, they used an online game created at UW called "fold it," and enlisted thousands of players worldwide to take a crack at cracking it.

Groups of players were soon rotating 3-d chains of amino acids in cyberspace and were able to generate models good enough for the researchers to refine and within a few days determine the enzyme's structure.

The game of science meets the science of gaming. Look for other 'gamely' collaborations that may change the way we teach math and science. In the article that published the findings in a scientific journal, the gamers were listed as co-authors.

"It's not a game--it's molecular biology, mom."


The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] Game Changer
A person, an event or a new and different idea that completely changes the way a situation develops.A person, an event or a new and different idea that completely changes the way a situation develops.

[2] High-Stakes Gamers

Most high stakes gamers are experienced people who have an aptitude for gambling. In this article, a gamer indicates a computer game player and high stakes gamers means experienced people who show a talent for computer games.

Sep 27, 2011

The Discovery Files: Birth And Syntax

Cognitive scientists at Johns Hopkins University have new evidence that confirms an older theory that human beings are born with some innate knowledge of certain rules of linguistics that make learning human languages easier.

Credit: NSF/Karson Productions




Audio Transcript:

Wired for Speech. (Sound effect: newborn baby cries)

(Sound effect: theme music) I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

"Gleej, slergena, glawb" do not adjust your ear buds. I'm trying to speak 'verblog' an artificial nanolanguage developed by researchers at Johns Hopkins University to test a hypothesis from over a half-century ago.

Let me back up a bit. 50 years ago, linguist/philosopher Norm Chomsky[1] put it out there that we are born already knowing some grammatical rules or at the very least having certain language sense kind of wired into our brains.

The Johns Hopkins study demonstrates that perhaps Chomsky was right, and in addition to death and taxes[2], we might have two more things on the 'sure' list: birth and syntax. We come into this world knowing certain rules that make it easier to learn language.

To test the theory the team came up with this made-up language called 'verblog,' constructed to utilize word-order combinations not usually found in most human languages. Sure enough, participants had difficulty learning verblog in its pure form, but could more easily grasp versions of it if some of the word-order combinations were adjusted to match those commonly found in human languages. It's as if the brain knew that the structure was unlikely.

Now we may be born with some linguistic capabilities but I'm sure one of them wasn't how to diagram a sentence; still can't do that.

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

-----------------
Notes:

[1] Norm Chomsky
-- An great American linguist. For more information, please visit at
http://en.wikipedia.org/wiki/Noam_Chomsky
[2] Death and tax
-- A proverb. Please refer to
http://www.phrases.org.uk/meanings/death-and-taxes.html

Sep 16, 2011

The Discovery Files: Brain Feed


According to researchers at Caltech deciding what to eat forces your brain to figure out how it feels about a food's taste versus its health benefits versus its portion size or even its packaging, and it needs to determine the importance of these attributes relative to each other.

Credit: NSF/Karson Productions




Audio Transcript:

Think Healthy, Eat Healthier.
(Sound effect: theme music) I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

Decisions, decisions. When it comes to making food choices, your brain is in charge of weighing all the options. Almost instantaneously, complex neurological processes kick in, based on everything from palatability to portion-size to packaging. New research out of Caltech indicates that we may be able to sway the brain toward making healthier choices.

The study involved 33 hungry adult volunteers being shown pictures of various foods while brain activity was monitored. Each looked at 180 different food items, from chips and candy bars to chicken and broccoli. With three seconds to decide whether or not they'd want to eat the food shown. They knew they could be served any one of the foods from their "yes" or "strong yes" list at the end of the experiment.

One more thing: before every 10 food choices, one of three instructions appeared on the screen "consider the healthiness," "consider the tastiness" or "make decisions naturally."

When asked to think about healthiness, subjects were less likely to choose unhealthy foods. Just getting the health instruction increased activity in the part of the brain responsible for self-control -- helping them to make better choices.

Jeez, all this food for thought is making me hungry.

For the discovery files, I'm Bob Karson.

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

Aug 4, 2011

The Discovery Files: Wing Talkers

When African Grey parrots talk, do they mimic sounds or consciously understand their speech? Irene Pepperberg, a comparative psychologist at both Brandeis and Harvard universities believes African Greys actually know what they're talking about.

Credit: NSF/Karson Productions




Audio Transcript:

Grey Area (Sound effect: parrot squawk)

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

Since 1977 when she bought an African grey parrot named Alex at a pet store, Dr. Irene Pepperberg has been investigating the premise that with the right training, these creatures can do a lot more than just 'parrot' back words and phrases. She believes that they can understand concepts and actually communicate. Before her prize student Alex died of natural causes in 2007, he had mastered the meanings of over 100 English words and he knew his colors and shapes.

(Sound effect: sound byte)

In addition to the verbal exercises and shape recognition, she's had the parrots correctly respond to tests involving color, material, number concepts, similarity, difference and absence. Pepperberg is always careful not to tip off the birds with subtle clues demonstrating that it's not simply rote learning.

These training techniques may reach far beyond our fine-feathered friends to human communication. Some of the methods are being tested to help autistic children better communicate.

Although I couldn't get to interview any of the parrots directly about Dr. Pepperberg (Sound effect: parrot audio: "I'm sorry."), I'm sure they speak highly of her.

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.

Jul 19, 2011

Decoding Disasters: Are We Prepared for Another 9-11?

Disaster Research Center scientists study world's worst disasters in hopes of saving more lives in the future.



At the site of a terrorist attack, an earthquake or a tsunami, emergency responders are focused on search and rescue, and saving lives.

Some disaster sites provide an opportunity for experts with different skills than the police, firefighters and aid organizations that are first on the scene.

With support from the National Science Foundation (NSF), sociologist Tricia Wachtendorf and teams from the Disaster Research Center (DRC) go to devastated locations to learn more about how lives may be saved in the future.

The DRC started in 1963 at the Ohio State University, and moved in the mid-1980s to the University of Delaware in Newark.

"We try to learn from disasters, not only to make a contribution to science, but also to try to take our findings and find out how we can apply that to better emergency management practice more generally," says Wachtendorf.

"We also have a very strong educational component," she adds. "We involve graduate and undergraduate students in all of our research."

Wachtendorf spent several weeks near ground zero after the 9/11 attacks in New York City. She spent time in command centers, watching how critical decisions unfolded.

Wachtendorf says DRC had a good working relationship with New York City emergency personnel before the terrorist attacks and this allowed the center important access even in the chaos.

"They lost friends, they lost family members, and they were very willing to have us shadow them, answer questions, and to actually say, 'Come here, you need to hear this, you need to learn from this,' and tell us what's going right and what's going wrong," says Wachtendorf.

Over the years, DRC research has recommended better ways to recover and handle human remains, streamline accounting of donations and supplies, and ways for small businesses to quickly reopen after a disaster. Through outreach to practitioners, many of their recommendations find their way into practice.

One specific study of the 9/11 response focused on the evacuation of half a million people from lower Manhattan the day of the attacks, including a spontaneous and successful effort by tug, ferry, dinner cruise and sightseeing boats. DRC Director James Kendra had a major part in that research.

"The mariners have a very particular culture and having worked in that environment in different kinds of ships, I think it was very helpful for us in being able to speak their language," says Kendra, who, in addition to a doctorate in geography, also has an undergraduate degree in marine transportation and a Merchant Marine Master Mariner license.

It was a case of ordinary people springing into action, making good decisions in spite of the danger and uncertainty surrounding them.

"We talked to 100 people who were involved in the evacuation," says Kendra.

"Many of them were mariners. They knew there was a terrible calamity at the World Trade Center, and they figured boats would be helpful in some way. That largely stems from what seafarers have to do ordinarily, which is to be creative, to be improvisational, to be ready for anything, even if you don’t know what the danger is going to be. They always have to be alert for surprises. That experience and that training carried over into their ability to take part in this evacuation."

Along with a library containing 60,000 publications related to disasters, at DRC, there are also several display cases that contain items from both ancient and recent disasters. Wachtendorf showed some items from the 2008 China earthquake. These objects, she says, are powerful teaching tools.

"A little bit from a teacup and a mah-jongg piece are very indicative of the daily life of what was going on when the earthquake happened. People were engaged in cooking and playing games and sometimes, it's these very small items that we pick off the ground that helps resonate how much this impacted daily life," she explains.

"It's one thing to read a paper about the disruption of a disaster on daily life; it's another to actually take a piece of an item that was scattered on the ground and to bring that message home; to be able to touch it, to feel it and use that in our conversations about the impact of disaster events."

One recurrent observation from DRC field studies is the kindness of strangers.
Kendra documented that compassion when analyzing some responses to the 9/11 attacks.

"People will delay their own evacuation in an effort to help somebody else," says Kendra. "That was reported to us over and over. The crowds were orderly and basically respectful even though they were obviously very shaken up."

And Wachtendorf found a similar sense of community after the 2004 Asian tsunami, meeting with residents of devastated fishing villages in India and Sri Lanka.

"In one village, we found over 50 fishermen who needed to get back to sea. They only had seven boats they were able to get donated to them. They made an arrangement that those boats became the community boats, so they took turns sharing the catch. It was a way to make sure everybody was able to get back in the sea and begin working again," she says.

But Wachtendorf also found inequality in the distribution of resources following some disasters. Often, she says, it's simply the result of access.

"Sometimes we also end up seeing that there are particular areas that get a lot of media attention. They are sometimes the areas that are easy to get into. They might have areas for journalists. And we hear a lot about those communities.

Unfortunately, what sometimes happens is, aid flows to those communities and doesn't always reach neighboring communities that are equally impacted, but don’t make it on TV," she explains.

Field study is important for graduate students at the DRC. Rochelle Brittingham is a doctoral student in the School of Public Policy and Administration at the University of Delaware. She has studied evacuation and sheltering projects in North Carolina. She's also doing field work in Japan, following the earthquake, tsunami and nuclear disaster there.

"After such a large-scale disaster in Japan, we want to see, what did the Japanese government do, were non-governmental organizations involved, basically how did it all work? We're going to go and see if there are any answers there," says Brittingham.

Lucia Velotti is also a doctoral student in the School of Public Policy and Administration. She says an understanding of local cultures is critical when spending time in a disaster zone. She did research in Haiti after the 2010 earthquake.

"Listening is very, very important and so is listening to different perspectives. You need to have the whole picture. You need to try to put all the pieces of the puzzle together. When I went to Haiti, we interviewed people from UN agencies. We also talked to non-governmental organizations and grassroots community leaders. We really wanted to understand different perspectives," says Velotti.

DRC's work involves input from many social and physical scientists. Civil engineer Rachel Davidson finds the collaboration critical.

"If you are looking from only one disciplinary domain, you can't see the big picture," says Davidson, who does modeling and analysis of building codes and evacuation strategies.

Speaking of her social science colleagues, she says, "I've learned a lot from them. In a way they kind of keep us honest. Because (in) developing engineering models, sometimes we're tempted to make assumptions about how the world works. And they'll often tell us, 'No, that's not actually how people make decisions.' Or 'No, that's not how people actually behave'. And so, we want to try to work together to develop better models and better understanding to improve the decision making in the long run. And hopefully, they've learned something from us as well."

Wachtendorf says compared to 50 years ago, there's been a tremendous emphasis on emergency management planning in the United States. Both federal agencies like FEMA--the Federal Emergency Management Agency--and state and local emergency managers have invested in facilities and planning.

But she also notes disaster planning is constantly changing.

"As we have a combination of new threats that face us--natural and technological--as we have changes in climate, as we have changes in population density, in where people are living, people are put at risk and new issues are created. It's never a stagnant field. So something that we might know back in the 1960s, we need to learn again in the 1980s to see how much of that is still relevant, and what has changed. (It's) the same thing now as we look back at that historical research, how do we need to adapt our plans in terms of political context or economic context?" says Wachtendorf.

From Science Nation

Jul 17, 2011

The Discovery Files: Golden Y-Ears

A growing body of research finds musical training gives students learning advantages in the classroom. Now a Northwestern University study finds musical training can benefit the grandparents, too, by offsetting some of the deleterious effects of aging.

Credit: NSF/Karson Productions




Audio Transcript:

Music--the Anti-aging Supplement.

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

A Northwestern University study shows that musical training could have beneficial effects in your later years. Groups of musicians and non-musicians, ages 45 thru 65 were tested. The team found those with lifelong musical training were better at recalling what they heard and could more easily discern speech in a noisy environment.

According to the researchers, the musicians train themselves to be able to remember complicated sound sequences, and to extract meaningful sounds from a complex soundscape--hearing their own instrument in a symphony and working with harmonies and rhythms.

As we age, our memory declines. At the same time, being able to hear a single voice in a crowded room often becomes next to impossible. The team believes a lifetime of musical training 'fine-tunes' the nervous system, sharpening our abilities to take in sound, hold it in memory, and process it. All of the musicians tested have been playing since age 9 at the latest.

The study shows that had you kept up with those lessons, your golden years[1] would have provided you with a better sense of hearing. So kids, tell your parents you want to join a band so you'll have better hearing when you get older. Yeah--that should go over.

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.
------------
Notes:
[1]golden years
-The time of life after retirement from active work.

May 27, 2011

Discovery Files: Flaw Dropper

Researchers at Case Western Reserve University and in Switzerland have developed a polymer-based material that can heal itself with the help of a widely used type of lighting. Imagine repairing unsightly scratches on your car or dining room table quickly, easily and inexpensively.

Credit: NSF/Karson Productions




Audio Transcript:

Just (Sound effect: key scratch sound) Scratching the Surface.

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

Aarghhh -- I hate that sound, the unmistakable key scratch on the finish of my new, not-yet-paid-for car. Thanks to researchers here at Case Western Reserve University and in Switzerland, soon there could be a way for that scratch to completely heal itself in under a minute.

(Sound Byte :07.5) "We came up with this idea to basically develop a coating that, if it was scratched, you could simply take out a light and heal the scratch."

Stuart Rowan, one of the lead researchers, on "metallo-supramolecular polymers" -- that when exposed to UV light, become liquid at the site of the damage, and fill the crevasse. Switch off the light and the polymers resolidify, leaving the surface as good as new.

(Sound Byte :11) "We took out a razor blade and deliberately scratched the material and then put it under a UV light and within 30 seconds the scratch had disappeared."

The team had previously developed this material for a different application. It just took the right modifications to give it its "flaw-dropping" power. And if you think it's only for cars, scratch that.

(Sound Byte :06) "This could be a new varnish for your dining room table, where if you get a scratch on your table, it can be easily removed."

There are probably endless applications. "Scratch 'n sniff"[1] was cool, but just wait 'til we enter the world of "scratch 'n fix."

The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.
------------
Notes:
[1] Scratch 'n sniff
Scratch 'N Sniff™ is the trade name for a special kind of perfume or scent saturated printing in which the scent is enclosed in minute capsules, which can be broken open by friction. Read more:
http://www.answers.com/topic/scratch-and-sniff

Apr 26, 2011

Discovery Files: Cleaner water through biodiversity

Diverse Osmosis

New evidence from the University of Michigan that biodiversity promotes water quality suggests that accelerating species losses may compromise future water quality.

Credit: NSF/Karson Productions




Audio Transcript:

It Takes a Village.[1]

I'm Bob Karson with the discovery files -- new advances in science and engineering from the National Science Foundation.

We hear a lot of reports about accelerating losses of species. Does it really matter? Scientists say biodiversity is important in keeping the earth's ecosystem in balance -- from freshening the air to purifying the water. But, some of these benefits have been lacking supporting data.

Now, a groundbreaking or should I say "watershed" study out of the University of Michigan verifies for the first time that biodiversity promotes better water quality.

Streaming: For the study, researchers built 150 miniature model streams with all the riffles, runs and pools you'd find in real streams. They added nitrates, the most common water pollutant and from one to eight species of pollution consuming algae. Each species of algae has evolved to occupy a particular mini-habitat or niche in streams. The more species, the more unique niches are filtered and cleansed.

In the experimental streams with all eight varieties of algae, the water was cleansed about four and a half times faster than streams with just one kind. The scientists say the study adds to the growing evidence that modern mass extinction of species is going to affect humanity in some big, important ways.
We may not need to save the planet as much if we just allow the planet to save itself.

"The Discovery Files" covers projects funded by the government's National Science Foundation. Federally sponsored research -- brought to you, by you! Learn more at nsf.gov or on our podcast.
------------
Notes:

[1] It takes a village.
--The phrase is attributed to the Nigerian Igbo culture and proverb "Ora na azu nwa" which means it takes the community/village to raise a child. For more detail, please visit
http://en.wikipedia.org/wiki/It_Takes_a_Village