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Wednesday, May 9, 2012
Fuel Cell USB Charger Resurrects Your Dead Phone Up To Fourteen Times [Charging]
AT&T, Verizon to add family data plans, but will they benefit you?
21 hrs.
AT&T Mobility CEO?Ralph de la Vega recently told CNET that the carrier plans to?offer family data plans soon.?Verizon has repeatedly?pledged?something similar.?T-Mobile and Sprint already offer such plans. But will these plans?? which allow a family to share a "bucket" of data, just like they can now share a "bucket" of minutes?? help you save money?
Short answer: Probably.
Long answer: Probably, but there are some catches.
Since T-Mobile and Sprint already offer family data plans, we have a general idea of what we can expect AT&T and Verizon to do. As with the other two carriers, you'll likely be able to purchase a single data plan which is to be shared among two or more lines. In the process you'll?save anywhere between $10 and $50 overall?(depending on the plan configuration and number of lines). That's not bad?? the money adds up after all.
But while you're saving some green, you're also missing out on some things.
Need an example? Let's look at T-Mobile's current "Classic Unlimited???Plus" plan:
- The single-line version?of this plan costs $80/month and gives you?unlimited minutes, unlimited texts and unlimited data (though only the first 2GB are "high-speed," after that you drop to 2G speeds).
- The two-line "family" version of this plan costs $140/month and?gives you unlimited minutes, unlimited texts and unlimited data (though only the first 2GB are "high-speed," after that you drop to 2G speeds).
Did you notice the very important thing these two plans have in common? They're both offering the same amount of "high-speed" data.
This detail is fine and dandy if only one of the lines on a family plan belongs to a data hog. Carriers now offer apps to let you track your usage, and some even let you set warnings so you don't go over. Many people who pay for 2GB plans actually use far less than 1GB per month, so this sort of pricing could be ideal.
But if both you and your buddy, partner or family member are prone to using up most of?your smartphone's data allowances, the $20/month you've saved by getting a T-Mobile?family data plan could come back to bite you in the form of throttled speeds.
Yes, this theoretically isn't an issue with Sprint, who claims that it doesn't throttle data speeds, but then again a lot of things are theoretically problem-free. When Verizon and AT&T do launch similar plans, a similar excessive use may end up costing you overage fees.
It would also pay to be on the lookout for increased per-phone surcharges that aren't advertised as part of the bundle, but are part of the final price. And any change that you make to your plan to save overall money by doing a data bundle may come with an unwanted side effect, such as the need to surrender a particularly desirable (but discontinues) voice or text message plan.
All those thoughts aside, we'll have to wait until AT&T and Verizon officially announce their own family data plans to truly figure out how everything compares and whether customers benefit in the long run ??and to see if the definitions of "unlimited data" get redefined again. Although both giant carriers have committed to family plans, when we ask them, neither is forthcoming about when the plans will see the light of day.
Want more tech news, silly puns, or amusing links? You'll get plenty of all three if you keep up with Rosa Golijan, the writer of this post, by following her on?Twitter, subscribing to her?Facebook?posts, or circling her?on?Google+.
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Canadian girl, 16, invents disease-fighting, anti-aging compound using tree particles
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Public release date: 8-May-2012[ | E-mail |
Share ] Contact: Terry Collins
tc@tca.tc
416-538-8712
Bioscience Education Canada
Powerful anti-oxidant discovered in tree pulp; Grade 12 researcher wins top honors at national biotech science competition
OTTAWA -- An Ontario girl, 16, who invented a disease-fighting, anti-aging compound using nano-particles from trees, won top national honours today in the 2012 Sanofi BioGENEius Challenge Canada (SBCC).
Her super anti-oxidant compound could one day help improve health and anti-aging products by neutralizing more of the harmful free-radicals found in the body. Her research is detailed below.
Janelle Tam, a Grade 12 student at Waterloo Collegiate Institute, was awarded the $5,000 first prize by an impressed panel of eminent Canadian scientists assembled at the Ottawa headquarters of the National Research Council of Canada.
In all, some 13 brilliant students in Grades 11 or 12, all just 16 to 18 years old, took part in the national finals. They were top prize winners of nine regional SBCC competitions conducted nationwide in March and April, events that showcased youthful Canadian talent in the fast-growing field of biotech science.
The theme of the competition, "How will you change the world?" inspired hundreds of students to participate in 2012 SBCC events Canada-wide.
2nd place ($4,000), was awarded to Rui Song, 16, a Grade 11 student from Walter Murray Collegiate, Saskatoon, for developing new insights into the potential creation of a more nutritious lentil (project profile: http://bit.ly/IrvD9I ). It is Rui's second major award at the national SBCC; she won first prize in 2010 when she was in Grade 9.
3rd place ($3,000): Alexander Tigert and Zelun (Daniel) Zhang, both 17, Grade 12, Northern Secondary School, who used genetically-modified Baker's yeast to create a novel environment for testing the effects of drug treatments for depression and anxiety. Project profile: http://bit.ly/IjfNoa
4th place ($2,000): Ella Thomson, 16, Grade 11, Balmoral Hall School, Winnipeg, who genetically modified a common soil bacteria to produce 36% more volume of the bio-ingredient used to make eco-friendly plastic. Project profile: http://bit.ly/IAd0Vn
5th place ($1,000): Romina Hassanzadeh, 17, Grade 12, All Saints Catholic High School, Kanata, who puzzled out a new insight into the workings of a cancer-fighting drug, a discovery that could one day impact medical approaches to cancer treatment. Project profile: http://bit.ly/ICpjzR
A special $1,000 prize for the project deemed to have the greatest commercial potential was awarded to Miranda Wang, 18, and Jeanny Yao, 17, both Grade 12, Magee Secondary School, Vancouver, who identified soil bacteria from the Fraser River estuary that naturally break down phthalates, a fossil fuel-based additive found in some plastics.
The girls have already approached firms in British Columbia and Ontario on potential commercialization ideas. Project profile: http://bit.ly/Jdt1vY
Honorable mention prizes of $500 were awarded to:
Nikola Viktorov and Andy Le, 16, Grade 11, from Old Scona Academic High School, Edmonton, who lit a potential path to the development of drugs that more effectively target diseased cells, creating a tool to help monitor the death of cells in lymphoma cancer. Project profile: http://bit.ly/Ife01i
Jared Trask, 17 and Kaitlyn Stockley, 16, Grade 11 students at Holy Spirit High School, Conception Bay West, NF, who used a centrifuge, chemicals and high frequency sound waves to extract a bio-fuel oil from local-obtained cold environment algae. Project profile: http://bit.ly/KsVbsM
and
Nivatha Balendra, 16, Grade 11, from Royal West Academy, Montreal, who found Isopropanol to be the better alcohol to use in hand sanitizers because it kills more bacteria and fewer skin cells than ethanol, the more common ingredient in such products. Project profile: http://bit.ly/JqbZiG
The students' national winnings add to those awarded in the regional competitions. In some cities, regional winners also receive university scholarships and/or summer jobs.
On June 18, Janelle Tam and Rui Song will represent Canada in Boston at the Sanofi-sponsored International BioGENEius Challenge, taking place in conjunction with the BIO Annual International Convention.
A powerful anti-oxidant discovered in tree pulp
Canada's next big technological and health breakthrough might come from cellulose, the woody material found in trees that enables them to stand. Cellulose is made up of tiny nano-particles called nano-crystalline cellulose (NCC) that are measured in thousandths of the width of a human hair.
Only recently discovered, Waterloo's Janelle Tam is the first to show that NCC is a powerful antioxidant, and may be superior to Vitamin C or E because it is more stable and its effectiveness won't diminish as quickly.
"NCC is non-toxic, stable, soluble in water and renewable, since it comes from trees," says Janelle, a Grade 12 student at Waterloo Collegiate Institute.
NCC has many unique properties: stronger than steel but flexible, durable and ultra light. Its potential uses are virtually limitless. Canada's national forest research institute, FPInnovations, predicts a $250 million dollar market in the coming decade.
The world's first large-scale NCC production plant opened in January at a pulp and paper mill in Windsor, Quebec. NCC is extracted from cellulose using a chemical process similar to that used in pulp mills.
"NCC is really a hot field of research in Canada," says Janelle, who notes that antioxidants have anti-aging and health promotion properties, including wound healing since they neutralize "free radicals" that damage or kill cells.
Janelle chemically 'paired' NCC with a well-known nano-particle called a buckminster fullerene. These 'buckyballs' (carbon molecules that look like a soccer ball) are already used in cosmetic and anti-aging products she says. The new NCC-buckyball combination acted like a 'nano-vacuum,' sucking up free radicals and neutralizing them.
"The results were really exciting," she says and especially since cellulose is already used as filler and stabilizer in many vitamin products. One day those products may be super-charged free radical neutralizers thanks to NCC, she hopes.
Dr. Yao was deeply impressed by Janelle's hardworking, creative thinking, organization and presentation skills. "It was a pleasure to have her in my lab since Janelle is not only a task-orientated young lady, also she also gets along very well with others."
Janelle, who moved to Canada from Singapore five years ago, and who with her sister Vivienne won first place in last year's SBCC Southwestern Ontario regional competition, says she loves the independence and opportunity to do original research that the Sanofi BioGENEius Challenge offers. She hopes to become a medical doctor and researcher.
The Hon. Diane Finley, Minister of Human Resources Skills Development Canada and keynote speaker at the awards ceremony, said: "Our government's top priority is job creation, and economic growth and we recognize that as the future workforce, young Canadians have much to contribute to our country's long term prosperity. We proudly support the BioGENEius Challenge as an excellent way to inspire young people to explore rewarding careers in high demand fields."
Sanofi Pasteur Canada President Mark Lievonen, who presented the first place prize, said: "When we founded the Sanofi BioGENEius Challenge Canada 19 years ago we believed then, as we do now, in the potential of our youth to develop the next big breakthrough in science. When I see the collaboration among education, government and industry at the SBCC each year, I am increasingly optimistic about Canada's opportunity to truly make a difference in the world."
Now in its 19th year, the SBCC gives young scientists access to university labs and academic mentors, encouraging the pursuit of future studies and careers in the country's fast-growing biotechnology sector. This year, more than 240 high school and CEGEP students across Canada submitted192 projects that ranged from exploring potential new drug treatments for Parkinson's disease, multiple sclerosis and cancer to using mold fungi as an alternative to traditional pesticides.
Each of the students worked for months conducting research and collaborating with university mentors.
The nine national finalists presented their projects at NRC headquarters Monday May 7 to a panel of eminent Canadian scientists:
Dr. Luis Barreto (Chief Judge), Senior Advisor, Vaccine Program, Human Health and Therapeutics, National Research Council Canada, and ex-Vice President, Immunization and Science Policy, Sanofi Pasteur Limited;
Dr. Jim Richards, Director General, Vaccine Program, Human Health and Therapeutics, National Research Council Canada;
Dr. Alain Beaudet, President, Canadian Institutes of Health Research;
Dr. Ron Pearlman, Associate Scientific Director, The Gairdner Foundation;
Dr. John Kelly, Vice-President, Erie Innovation and Commercialization, Ontario Fruit & Vegetable Growers' Association; and
Dr. Alison Symington, Vice President, Outreach, Ontario Genomics Institute.
Also on the judging panel was Marshall Zhang, 18, of Richmond Hill Collegiate, national first-place winner of the SBCC in 2011.
"Every young person that gets to this level of competition is a winner and I congratulate them equally," said chief judge Luis Barreto. "Credit goes to all the students and mentors from coast to coast who took part in this year's event. There is great talent across our country. Every one of the participants and their talent left the judges in genuine delight."
The award ceremony at the NRC also included a special presentation honouring the contribution to SBCC of Jeff Graham of Toronto, Chair and President of Bioscience Education Canada, which has coordinated the competition from its beginning in 1994.
###
About the Sanofi BioGENEius Challenge Canada (SBCC)
The Sanofi BioGENEius Challenge Canada (SBCC) is a national, biotechnology research competition that encourages high school and CEGEP students to pursue future studies and careers in the exciting field of biotechnology. The initiative is sponsored by Sanofi Pasteur Limited, Sanofi Canada, Genome Canada, the National Research Council Canada/ Conseil national de recherches Canada (NRC-CNRC), Canadian Institutes of Health Research/Instituts de recherche en sant du Canada (CIHR-IRSC) and the Government of Canada's Youth Awareness Program. Canada's respected Sanofi BioGENEius Challenge Canada has inspired counterpart competitions in the USA and Australia.
For more information, please visit sanofibiogeneiuschallenge.ca, follow us on Facebook or Twitter @BioscienceEdCan #SBCC2012
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
Public release date: 8-May-2012[ | E-mail |
Share ] Contact: Terry Collins
tc@tca.tc
416-538-8712
Bioscience Education Canada
Powerful anti-oxidant discovered in tree pulp; Grade 12 researcher wins top honors at national biotech science competition
OTTAWA -- An Ontario girl, 16, who invented a disease-fighting, anti-aging compound using nano-particles from trees, won top national honours today in the 2012 Sanofi BioGENEius Challenge Canada (SBCC).
Her super anti-oxidant compound could one day help improve health and anti-aging products by neutralizing more of the harmful free-radicals found in the body. Her research is detailed below.
Janelle Tam, a Grade 12 student at Waterloo Collegiate Institute, was awarded the $5,000 first prize by an impressed panel of eminent Canadian scientists assembled at the Ottawa headquarters of the National Research Council of Canada.
In all, some 13 brilliant students in Grades 11 or 12, all just 16 to 18 years old, took part in the national finals. They were top prize winners of nine regional SBCC competitions conducted nationwide in March and April, events that showcased youthful Canadian talent in the fast-growing field of biotech science.
The theme of the competition, "How will you change the world?" inspired hundreds of students to participate in 2012 SBCC events Canada-wide.
2nd place ($4,000), was awarded to Rui Song, 16, a Grade 11 student from Walter Murray Collegiate, Saskatoon, for developing new insights into the potential creation of a more nutritious lentil (project profile: http://bit.ly/IrvD9I ). It is Rui's second major award at the national SBCC; she won first prize in 2010 when she was in Grade 9.
3rd place ($3,000): Alexander Tigert and Zelun (Daniel) Zhang, both 17, Grade 12, Northern Secondary School, who used genetically-modified Baker's yeast to create a novel environment for testing the effects of drug treatments for depression and anxiety. Project profile: http://bit.ly/IjfNoa
4th place ($2,000): Ella Thomson, 16, Grade 11, Balmoral Hall School, Winnipeg, who genetically modified a common soil bacteria to produce 36% more volume of the bio-ingredient used to make eco-friendly plastic. Project profile: http://bit.ly/IAd0Vn
5th place ($1,000): Romina Hassanzadeh, 17, Grade 12, All Saints Catholic High School, Kanata, who puzzled out a new insight into the workings of a cancer-fighting drug, a discovery that could one day impact medical approaches to cancer treatment. Project profile: http://bit.ly/ICpjzR
A special $1,000 prize for the project deemed to have the greatest commercial potential was awarded to Miranda Wang, 18, and Jeanny Yao, 17, both Grade 12, Magee Secondary School, Vancouver, who identified soil bacteria from the Fraser River estuary that naturally break down phthalates, a fossil fuel-based additive found in some plastics.
The girls have already approached firms in British Columbia and Ontario on potential commercialization ideas. Project profile: http://bit.ly/Jdt1vY
Honorable mention prizes of $500 were awarded to:
Nikola Viktorov and Andy Le, 16, Grade 11, from Old Scona Academic High School, Edmonton, who lit a potential path to the development of drugs that more effectively target diseased cells, creating a tool to help monitor the death of cells in lymphoma cancer. Project profile: http://bit.ly/Ife01i
Jared Trask, 17 and Kaitlyn Stockley, 16, Grade 11 students at Holy Spirit High School, Conception Bay West, NF, who used a centrifuge, chemicals and high frequency sound waves to extract a bio-fuel oil from local-obtained cold environment algae. Project profile: http://bit.ly/KsVbsM
and
Nivatha Balendra, 16, Grade 11, from Royal West Academy, Montreal, who found Isopropanol to be the better alcohol to use in hand sanitizers because it kills more bacteria and fewer skin cells than ethanol, the more common ingredient in such products. Project profile: http://bit.ly/JqbZiG
The students' national winnings add to those awarded in the regional competitions. In some cities, regional winners also receive university scholarships and/or summer jobs.
On June 18, Janelle Tam and Rui Song will represent Canada in Boston at the Sanofi-sponsored International BioGENEius Challenge, taking place in conjunction with the BIO Annual International Convention.
A powerful anti-oxidant discovered in tree pulp
Canada's next big technological and health breakthrough might come from cellulose, the woody material found in trees that enables them to stand. Cellulose is made up of tiny nano-particles called nano-crystalline cellulose (NCC) that are measured in thousandths of the width of a human hair.
Only recently discovered, Waterloo's Janelle Tam is the first to show that NCC is a powerful antioxidant, and may be superior to Vitamin C or E because it is more stable and its effectiveness won't diminish as quickly.
"NCC is non-toxic, stable, soluble in water and renewable, since it comes from trees," says Janelle, a Grade 12 student at Waterloo Collegiate Institute.
NCC has many unique properties: stronger than steel but flexible, durable and ultra light. Its potential uses are virtually limitless. Canada's national forest research institute, FPInnovations, predicts a $250 million dollar market in the coming decade.
The world's first large-scale NCC production plant opened in January at a pulp and paper mill in Windsor, Quebec. NCC is extracted from cellulose using a chemical process similar to that used in pulp mills.
"NCC is really a hot field of research in Canada," says Janelle, who notes that antioxidants have anti-aging and health promotion properties, including wound healing since they neutralize "free radicals" that damage or kill cells.
Janelle chemically 'paired' NCC with a well-known nano-particle called a buckminster fullerene. These 'buckyballs' (carbon molecules that look like a soccer ball) are already used in cosmetic and anti-aging products she says. The new NCC-buckyball combination acted like a 'nano-vacuum,' sucking up free radicals and neutralizing them.
"The results were really exciting," she says and especially since cellulose is already used as filler and stabilizer in many vitamin products. One day those products may be super-charged free radical neutralizers thanks to NCC, she hopes.
Dr. Yao was deeply impressed by Janelle's hardworking, creative thinking, organization and presentation skills. "It was a pleasure to have her in my lab since Janelle is not only a task-orientated young lady, also she also gets along very well with others."
Janelle, who moved to Canada from Singapore five years ago, and who with her sister Vivienne won first place in last year's SBCC Southwestern Ontario regional competition, says she loves the independence and opportunity to do original research that the Sanofi BioGENEius Challenge offers. She hopes to become a medical doctor and researcher.
The Hon. Diane Finley, Minister of Human Resources Skills Development Canada and keynote speaker at the awards ceremony, said: "Our government's top priority is job creation, and economic growth and we recognize that as the future workforce, young Canadians have much to contribute to our country's long term prosperity. We proudly support the BioGENEius Challenge as an excellent way to inspire young people to explore rewarding careers in high demand fields."
Sanofi Pasteur Canada President Mark Lievonen, who presented the first place prize, said: "When we founded the Sanofi BioGENEius Challenge Canada 19 years ago we believed then, as we do now, in the potential of our youth to develop the next big breakthrough in science. When I see the collaboration among education, government and industry at the SBCC each year, I am increasingly optimistic about Canada's opportunity to truly make a difference in the world."
Now in its 19th year, the SBCC gives young scientists access to university labs and academic mentors, encouraging the pursuit of future studies and careers in the country's fast-growing biotechnology sector. This year, more than 240 high school and CEGEP students across Canada submitted192 projects that ranged from exploring potential new drug treatments for Parkinson's disease, multiple sclerosis and cancer to using mold fungi as an alternative to traditional pesticides.
Each of the students worked for months conducting research and collaborating with university mentors.
The nine national finalists presented their projects at NRC headquarters Monday May 7 to a panel of eminent Canadian scientists:
Dr. Luis Barreto (Chief Judge), Senior Advisor, Vaccine Program, Human Health and Therapeutics, National Research Council Canada, and ex-Vice President, Immunization and Science Policy, Sanofi Pasteur Limited;
Dr. Jim Richards, Director General, Vaccine Program, Human Health and Therapeutics, National Research Council Canada;
Dr. Alain Beaudet, President, Canadian Institutes of Health Research;
Dr. Ron Pearlman, Associate Scientific Director, The Gairdner Foundation;
Dr. John Kelly, Vice-President, Erie Innovation and Commercialization, Ontario Fruit & Vegetable Growers' Association; and
Dr. Alison Symington, Vice President, Outreach, Ontario Genomics Institute.
Also on the judging panel was Marshall Zhang, 18, of Richmond Hill Collegiate, national first-place winner of the SBCC in 2011.
"Every young person that gets to this level of competition is a winner and I congratulate them equally," said chief judge Luis Barreto. "Credit goes to all the students and mentors from coast to coast who took part in this year's event. There is great talent across our country. Every one of the participants and their talent left the judges in genuine delight."
The award ceremony at the NRC also included a special presentation honouring the contribution to SBCC of Jeff Graham of Toronto, Chair and President of Bioscience Education Canada, which has coordinated the competition from its beginning in 1994.
###
About the Sanofi BioGENEius Challenge Canada (SBCC)
The Sanofi BioGENEius Challenge Canada (SBCC) is a national, biotechnology research competition that encourages high school and CEGEP students to pursue future studies and careers in the exciting field of biotechnology. The initiative is sponsored by Sanofi Pasteur Limited, Sanofi Canada, Genome Canada, the National Research Council Canada/ Conseil national de recherches Canada (NRC-CNRC), Canadian Institutes of Health Research/Instituts de recherche en sant du Canada (CIHR-IRSC) and the Government of Canada's Youth Awareness Program. Canada's respected Sanofi BioGENEius Challenge Canada has inspired counterpart competitions in the USA and Australia.
For more information, please visit sanofibiogeneiuschallenge.ca, follow us on Facebook or Twitter @BioscienceEdCan #SBCC2012
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
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Tuesday, May 8, 2012
Use your Bluetooth headset as a remote camera shutter on the HTC One series
Whoa! That's pretty slick! If you can't see the video, let me describe it -- a fellow from the Chinese forum ePrice is using a paired Bluetooth headset as a remote camera button on his HTC One X. Not all headsets will work (and unfortunately my Motorola headset falls into that not-working category), and the button combination needed seems to vary a little bit, but this seems to be an undocumented feature with the One series phones. Give it a shot, and holler in the comments if your headset works -- 'cause I need a new one now.
Source: ePrice (Chinese). Thanks, anon!
 |  |
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We Celebrate the Most Important Woman of All ? Mom!
Being a mom is one of the most rewarding jobs in the world, one that women gladly do without thanks. This week, we honor mothers everywhere for their sacrifices, for making us laugh, for the lessons they impart, and for their unconditional love. Moms – you are our iVillage Woman of the Week!
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Monday, May 7, 2012
Blurry-cam pic claims to show Sony LT29i Hayabusa
We've heard rumors of a new Sony flagship phone on the way, by the codename of "Hayabusa," or LT29i to give it its product number. Last month an alleged image of the device in field testing appeared online, and now we have what may be a slightly clearer -- though still blurry -- photo of the device. Today's shots show the unmistakable green Xperia logo around the back, with a large camera lens up top and single LED flash. The front of the phone appears to be dominated by a large screen, with no traditional physical buttons, which might corroborate rumors that the Hayabusa will feature on-screen buttons. The device also appears to be fairly thin, though it's impossible to judge this precisely. Also of interest are the curved corners, in stark contrast to the sharp edges of the current crop of Xperia NXT phones.
As for rumored specs, the Hayabusa is said to sport a dual-core Snapdragon S4 Pro chipset -- that's the one with the faster Adreno 320 GPU -- with 1GB of RAM, a 4.55-inch 720p screen (with on-screen buttons), and Android 4.0 Ice Cream Sandwich. A whopping 2200mAh battery and 13MP camera are also rumored. If accurate, these specs would make the Hayabusa a worthy competitor to the HTC One X and Samsung Galaxy S III. And if rumors of a 7-8mm thin chassis are true, the device could also be a worthy successor to last year's Xperia Arc.
A leaked roadmap suggests that the Hayabusa may appear in July around the €500 mark, while recent rumors from UnwiredView? suggest a June announcement could be on the cards.
Of course we're well within unconfirmed rumor territory here, so take these reports with a grain of salt. Nevertheless, we'll admit to being intrigued by the possibility of a new super-high-end device from Sony. And the manufacturer will need to deliver something special in any upcoming flagship if it wants to compete with the latest devices from Samsung and HTC.
Source: UnwiredView IT168; via: XperiaBlog
| |
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Seeing a Deflated Supermoon Shrinks My Brain [Image Cache]
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How wind farms could cause local (but not global) warming
The atmospheric turbulence caused by large wind farms could cause local temperature increases, a new study indicates.?
Large wind farms might have a warming effect on the local climate, research in the United States showed on Sunday, casting a shadow over the long-term sustainability of wind power.
Skip to next paragraphCarbon dioxide and other greenhouse gases from burning fossil fuels contribute to global warming, which could lead to the melting of glaciers, sea level rise, ocean acidification, crop failure and other devastating effects, scientists say.
In a move to cut such emissions, many nations are moving towards cleaner energy sources such as wind power.
The world's wind farms last year had the capacity to produce 238 gigawatt of electricity at any one time. That was a 21 percent rise on 2010 and capacity is expected to reach nearly 500 gigawatt by the end of 2016 as more, and bigger, farms spring up, according to the Global Wind Energy Council.
Researchers at the State University of New York at Albany analysed the satellite data of areas around large wind farms in Texas, where four of the world's largest farms are located, over the period 2003 to 2011.
The results, published in the journal Nature Climate Change, showed a warming trend of up to 0.72 degrees Celsius per decade in areas over the farms, compared with nearby regions without the farms.
"We attribute this warming primarily to wind farms," the study said. The temperature change could be due to the effects of the energy expelled by farms and the movement and turbulence generated by turbine rotors, it said.
"These changes, if spatially large enough, may have noticeable impacts on local to regional weather and climate," the authors said.
More research needed
But the researchers said more studies were needed, at different locations and for longer periods, before any firm conclusions could be drawn.
Scientists say the world's average temperature has warmed by about 0.8 degrees Celsius since 1900, and nearly 0.2 degrees per decade since 1979. Efforts to cut carbon dioxide and other greenhouse gas emissions are not seen as sufficient to stop the planet heating up beyond 2 degrees C this century, a threshold scientists say risks an unstable climate in which weather extremes are common.
The Texas study found the temperature around wind farms rose more at night, compared with nearby regions. This was possibly because while the earth usually cools after the sun sets, bringing the air temperature down, the turbulence produced by the farms kept the ground in their area warm.
Previous research in 2010 by other U.S. scientists found wind farms could make the nights warmer and days cooler in their immediate vicinity, but those effects could be minimised by changing turbines' rotor design or by building the farms in areas with high natural turbulence.
That research was based on evidence from two meteorological towers over a six-week period.
Although the warming effect shown in that study and the latest research is local, and small compared to overall land surface temperature change, the findings could lead to more in-depth studies.
The authors of the study released on Sunday said: "Given the present installed (wind farm) capacity and the projected installation across the world, this study draws attention to an important issue that requires further investigation."
"We need to better understand the system with observations and better describe and model the complex processes involved to predict how wind farms may affect future weather and climate."
Commenting on the study, Steven Sherwood, co-director of the Climate Change Research Centre at the University of New South Wales in Australia, said:
"Daytime temperatures do not appear to be affected. This makes sense, since at night the ground becomes much cooler than the air just a few hundred metres above the surface. The wind farms generate gentle turbulence near the ground that causes these to mix together, thus the ground doesn't get quite as cool."
?(Edited by Pravin Char)
Sunday, May 6, 2012
Proof That Even A Screwdriver Becomes Obsolete [Design]
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