Friday, May 17, 2013

Obama appoints OMB official Danny Werfel to head up IRS

President Barack Obama on Thursday appointed Danny Werfel, an official with the Office of Management and Budget, as acting commissioner of the Internal Revenue Service. Werfel replaces Steven Miller, the acting commissioner forced to resign on Wednesday over the IRS having targeted conservative groups for special scrutiny.

Werfel, whose appointment will be effective May 22, "will lead efforts to ensure the IRS implements new safeguards to restore public trust and administers the tax code with fairness and integrity," the White House said in a statement. He will serve through the end of the fiscal year.

?Throughout his career working in both Democratic and Republican administrations, Danny has proven an effective leader who serves with professionalism, integrity and skill," Obama added in the statement. "The American people deserve to have the utmost confidence and trust in their government, and as we work to get to the bottom of what happened and restore confidence in the IRS, Danny has the experience and management ability necessary to lead the agency at this important time."

Werfel has been serving as the administration's point person on the sequester.

Obama announced on Wednesday night that Miller was asked to resign after the revelations that IRS employees targeted conservative-sounding groups applying for tax-exempt status. And the president added at a press conference earlier on Thursday that a replacement was imminent.

"We will be putting in new leadership that will be able to make sure that?following up on the IG audit?that we gather up all the facts, that we hold accountable those who have taken these outrageous actions," Obama said at a Rose Garden press conference with the prime minister of Turkey, Recep Tayyip Erdogan. "As I said last night, it is just simply unacceptable for there to even be a hint of partisanship or ideology when it comes to the application of our tax laws."

Source: http://news.yahoo.com/blogs/ticket/obama-choose-omb-official-danny-werfel-head-irs-191121420.html

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Common Core: Teachers Are Not Prepared

Simon & Garfunkel?s ?Bridge Over Troubled Water? is a classic. When I think about today?s bridge over troubled water, I think about how prepared I am to implement the Common Core State Standards (CCSS). I think about how to bridge Common Core State Standards and Career Technical Education (CTE) together.

I work in a vocational high school as a CTE commercial art teacher. Most of my CTE colleagues and I have heard of the CCSS, but we aren?t prepared to use the standards in the classroom. In doing my own research, I learned that the mission statement for the CCSS Initiative is to ?provide a consistent, clear understanding of what students are expected to learn, so teachers and parents know what they need to do to help them.?

As a CTE instructor, I feel left out of the loop compared to the academic subjects. There has not been a clear understanding of the CCSS. Some CTE instructors feel the CCSS is for language arts and math teachers, and others feel they are just being forced to add another acronym to their vocabulary.

?

?

Regardless of the subject being taught, all teachers need to clearly understand what the CCSS are so they can help students excel. Simply telling a teacher to use CCSS is not sufficient. ?

According to the CCSS website, the standards are ?designed to be robust and relevant to the real world, reflecting the knowledge and skills that our young people need for success in college and careers.? If this is the case, then CTE and other non-tested subjects need to be recognized as real-world subjects and given the necessary tools in order to achieve these goals.

The National Association of State Directors of Career Technical Education Consortium (NASDCTc) made this statement in May 2011 questioning how CTE will be aligned to the CCSS:

Though the CCSS provide a thoughtful framework for academic coursework, they do not fully address the critical career component that is essential to every student?s education. The standards do not reference employability skills that all students need to be thoroughly prepared for further education and careers, nor do they integrate career-specific skills. Therefore, to provide students with a more comprehensive education, schools must integrate or align technical standards with the CCSS.

Just last year, Achieve produced a valuable resource, Common Core State Standards & Career and Technical Education: Bridging the Divide between College and Career Readiness. It outlines a set of strategies for state and district leaders to make certain the implementation of CCSS aligns, informs, engages, and benefits the CTE community.

I believe this can work if school districts incorporate professional development activities to help CTE instructors integrate CCSS into their classrooms. To reiterate, telling CTE teachers to align their curriculum to the CCSS is not sufficient.

Alyssa Lynch, the CTE Director of the Santa Clara County Office of Education in San Jose, California,?wrote a presentation stating, ?Nearly half the states have no CTE representation on their CCSS implementation teams.?

In order for CTE instructors to be equipped to implement the CCSS, school districts are going to have come together. An alignment of educational systems that support the goals of CCSS and CTE will need to be developed through specific strategies. Identifying common barriers and challenges, providing instructional resources, and updating curricular are a few steps that will help bridge CTE programs.

Related Stories on TakePart:

? Common Core: What It Means for American Education

? Common Core: What?s Worrying Critics

? Common Core: Will Testing Be Its Fatal Flaw?


Indira Bailey is a visual art teacher at Essex County Vocational School, Bloomfield, NJ. Ms. Bailey is a 2013 Hope Street Group National Teacher Fellow (HSG).? She is also the 2012-2013 Essex County Teacher of the Year and finalist for New Jersey Teacher of the Year. TakePart.com

Source: http://news.yahoo.com/common-core-teachers-not-prepared-190048575.html

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DNA-guided assembly yields novel ribbon-like nanostructures

DNA-guided assembly yields novel ribbon-like nanostructures [ Back to EurekAlert! ] Public release date: 16-May-2013
[ | E-mail | Share Share ]

Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory

Approach could be useful in fabricating new kinds of materials with engineered properties

UPTON, NY-Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have discovered that DNA "linker" strands coax nano-sized rods to line up in way unlike any other spontaneous arrangement of rod-shaped objects. The arrangement-with the rods forming "rungs" on ladder-like ribbons linked by multiple DNA strands-results from the collective interactions of the flexible DNA tethers and may be unique to the nanoscale. The research, described in a paper published online in ACS Nano, a journal of the American Chemical Society, could result in the fabrication of new nanostructured materials with desired properties.

"This is a completely new mechanism of self-assembly that does not have direct analogs in the realm of molecular or microscale systems," said Brookhaven physicist Oleg Gang, lead author on the paper, who conducted the bulk of the research at the Lab's Center for Functional Nanomaterials (CFN, http://www.bnl.gov/cfn/).

Broad classes of rod-like objects, ranging from molecules to viruses, often exhibit typical liquid-crystal-like behavior, where the rods align with a directional dependence, sometimes with the aligned crystals forming two-dimensional planes over a given area. Rod shaped objects with strong directionality and attractive forces between their ends-resulting, for example, from polarized charge distribution-may also sometimes line up end-to-end forming linear one-dimensional chains.

Neither typical arrangement is found in the DNA-tethered nanorods.

"Our discovery shows that a qualitatively new regime emerges for nanoscale objects decorated with flexible molecular tethers of comparable sizes-a one-dimensional ladder-like linear arrangement that appears in the absence of end-to-end affinity among the rods," Gang said.

Alexei Tkachenko, the CFN scientist who developed the theory to explain the exceptional arrangement, elaborated: "Remarkably, the system has all three dimensions to live in, yet it chooses to form the linear, almost one-dimensional ribbons. It can be compared to how extra dimensions that are hypothesized by high-energy physicists become 'hidden,' so that we find ourselves in a 3-D world."

Tkachenko explains how the ladder-like alignment results from a fundamental symmetry breaking:

"Once a nanorod connects to another one side-by-side, it loses the cylindrical symmetry it had when it had free tethers all around. Then, the next nanorod will preferentially bind to another side of the first, where there are still DNA linkers available."

DNA as glue

Using synthetic DNA as a form of molecular glue to guide nanoparticle assembly has been a central approach of Gang's research at the CFN. His previous work has shown that strands of this molecule-better known for carrying the genetic code of living things-can pull nanoparticles together when strands bearing complementary sequences of nucleotide bases (known by the letters A, T, G, and C) are used as tethers, or inhibit binding when unmatched strands are used. Carefully controlling those attractive and inhibitory forces can lead to fine-tuned nanoscale engineering.

In the current study, the scientists used gold nanorods and single strands of DNA to explore arrangements made with complementary tethers attached to adjacent rods. They also examined the effects of using linker strands of varying lengths to serve as the tethering glue.

After mixing the various combinations, they studied the resulting arrangements using ultraviolet-visible spectroscopy at the CFN, and also with small-angle x-ray scattering at Brookhaven's National Synchrotron Light Source (NSLS, http://www.bnl.gov/ps/nsls/about-NSLS.asp). They also used techniques to "freeze" the action at various points during assembly and observed those static phases using scanning electron microscopy to get a better understanding of how the process progressed over time.

The various analysis methods confirmed the side-by-side arrangement of the nanorods arrayed like rungs on a ladder-like ribbon during the early stages of assembly, followed later by stacking of the ribbons and finally larger-scale three-dimensional aggregation due to the formation of DNA bridges between the ribbons.

This staged assembly process, called hierarchical, is reminiscent of self-assembly in many biological systems (for example, the linking of amino acids into chains followed by the subsequent folding of these chains to form functional proteins).

The stepwise nature of the assembly suggested to the team that the process could be stopped at the intermediate stages. Using "blocker" strands of DNA to bind up the remaining free tethers on the linear ribbon-like structures, they demonstrated their ability to prevent the later-stage interactions that form aggregate structures.

"Stopping the assembly process at the ladder-like ribbon stage could potentially be applied for the fabrication of linear structures with engineered properties," Gang said. "For example by controlling plasmonic or fluorescent properties-the materials' responses to light-we might be able to make nanoscale light concentrators or light guides, and be able to switch them on demand."

###

Additional authors on this study include: Stephanie Vial of CFN and the International Iberian Nanotechnology Laboratory in Braga, Portugal, and Dmytro Nykypanchuk, and Kevin Yager, all of CFN.

This research was funded by the DOE Office of Science (BES), which also provides operations support for the CFN and NSLS at Brookhaven Lab.

The Center for Functional Nanomaterials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the U.S. Department of Energy, Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE's Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. More information about the DOE NSRCs: http://science.energy.gov/bes/suf/user-facilities/nanoscale-science-research-centers.

One of the world's most widely used scientific research facilities, the National Synchrotron Light Source (NSLS) is host each year to 2,400 researchers from more than 400 universities, laboratories, and companies. Research conducted at the NSLS has yielded advances in biology, physics, chemistry, geophysics, medicine, and materials science. More information about NSLS: http://www.bnl.gov/ps/nsls/About-NSLS.asp.

DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.

Related Links

Scientific paper: Linear Mesostructures in DNA-Nanorod Self-Assembly

Online version of this news release with related graphics: http://www.bnl.gov/newsroom/news.php?a=11540

Press releases on previous related work: Multi-Component Nano-Structures with Tunable Optical Properties

Switchable Nanostructures Made with DNA

DNA-Based Assembly Line for Precision Nano-Cluster Construction

Media contacts: Karen McNulty Walsh, (631) 344-8350, kmcnulty@bnl.gov, or Peter Genzer, (631) 344-3174, genzer@bnl.gov

One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation for the State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit applied science and technology organization.


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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.


DNA-guided assembly yields novel ribbon-like nanostructures [ Back to EurekAlert! ] Public release date: 16-May-2013
[ | E-mail | Share Share ]

Contact: Karen McNulty Walsh
kmcnulty@bnl.gov
631-344-8350
DOE/Brookhaven National Laboratory

Approach could be useful in fabricating new kinds of materials with engineered properties

UPTON, NY-Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have discovered that DNA "linker" strands coax nano-sized rods to line up in way unlike any other spontaneous arrangement of rod-shaped objects. The arrangement-with the rods forming "rungs" on ladder-like ribbons linked by multiple DNA strands-results from the collective interactions of the flexible DNA tethers and may be unique to the nanoscale. The research, described in a paper published online in ACS Nano, a journal of the American Chemical Society, could result in the fabrication of new nanostructured materials with desired properties.

"This is a completely new mechanism of self-assembly that does not have direct analogs in the realm of molecular or microscale systems," said Brookhaven physicist Oleg Gang, lead author on the paper, who conducted the bulk of the research at the Lab's Center for Functional Nanomaterials (CFN, http://www.bnl.gov/cfn/).

Broad classes of rod-like objects, ranging from molecules to viruses, often exhibit typical liquid-crystal-like behavior, where the rods align with a directional dependence, sometimes with the aligned crystals forming two-dimensional planes over a given area. Rod shaped objects with strong directionality and attractive forces between their ends-resulting, for example, from polarized charge distribution-may also sometimes line up end-to-end forming linear one-dimensional chains.

Neither typical arrangement is found in the DNA-tethered nanorods.

"Our discovery shows that a qualitatively new regime emerges for nanoscale objects decorated with flexible molecular tethers of comparable sizes-a one-dimensional ladder-like linear arrangement that appears in the absence of end-to-end affinity among the rods," Gang said.

Alexei Tkachenko, the CFN scientist who developed the theory to explain the exceptional arrangement, elaborated: "Remarkably, the system has all three dimensions to live in, yet it chooses to form the linear, almost one-dimensional ribbons. It can be compared to how extra dimensions that are hypothesized by high-energy physicists become 'hidden,' so that we find ourselves in a 3-D world."

Tkachenko explains how the ladder-like alignment results from a fundamental symmetry breaking:

"Once a nanorod connects to another one side-by-side, it loses the cylindrical symmetry it had when it had free tethers all around. Then, the next nanorod will preferentially bind to another side of the first, where there are still DNA linkers available."

DNA as glue

Using synthetic DNA as a form of molecular glue to guide nanoparticle assembly has been a central approach of Gang's research at the CFN. His previous work has shown that strands of this molecule-better known for carrying the genetic code of living things-can pull nanoparticles together when strands bearing complementary sequences of nucleotide bases (known by the letters A, T, G, and C) are used as tethers, or inhibit binding when unmatched strands are used. Carefully controlling those attractive and inhibitory forces can lead to fine-tuned nanoscale engineering.

In the current study, the scientists used gold nanorods and single strands of DNA to explore arrangements made with complementary tethers attached to adjacent rods. They also examined the effects of using linker strands of varying lengths to serve as the tethering glue.

After mixing the various combinations, they studied the resulting arrangements using ultraviolet-visible spectroscopy at the CFN, and also with small-angle x-ray scattering at Brookhaven's National Synchrotron Light Source (NSLS, http://www.bnl.gov/ps/nsls/about-NSLS.asp). They also used techniques to "freeze" the action at various points during assembly and observed those static phases using scanning electron microscopy to get a better understanding of how the process progressed over time.

The various analysis methods confirmed the side-by-side arrangement of the nanorods arrayed like rungs on a ladder-like ribbon during the early stages of assembly, followed later by stacking of the ribbons and finally larger-scale three-dimensional aggregation due to the formation of DNA bridges between the ribbons.

This staged assembly process, called hierarchical, is reminiscent of self-assembly in many biological systems (for example, the linking of amino acids into chains followed by the subsequent folding of these chains to form functional proteins).

The stepwise nature of the assembly suggested to the team that the process could be stopped at the intermediate stages. Using "blocker" strands of DNA to bind up the remaining free tethers on the linear ribbon-like structures, they demonstrated their ability to prevent the later-stage interactions that form aggregate structures.

"Stopping the assembly process at the ladder-like ribbon stage could potentially be applied for the fabrication of linear structures with engineered properties," Gang said. "For example by controlling plasmonic or fluorescent properties-the materials' responses to light-we might be able to make nanoscale light concentrators or light guides, and be able to switch them on demand."

###

Additional authors on this study include: Stephanie Vial of CFN and the International Iberian Nanotechnology Laboratory in Braga, Portugal, and Dmytro Nykypanchuk, and Kevin Yager, all of CFN.

This research was funded by the DOE Office of Science (BES), which also provides operations support for the CFN and NSLS at Brookhaven Lab.

The Center for Functional Nanomaterials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the U.S. Department of Energy, Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE's Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. More information about the DOE NSRCs: http://science.energy.gov/bes/suf/user-facilities/nanoscale-science-research-centers.

One of the world's most widely used scientific research facilities, the National Synchrotron Light Source (NSLS) is host each year to 2,400 researchers from more than 400 universities, laboratories, and companies. Research conducted at the NSLS has yielded advances in biology, physics, chemistry, geophysics, medicine, and materials science. More information about NSLS: http://www.bnl.gov/ps/nsls/About-NSLS.asp.

DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.

Related Links

Scientific paper: Linear Mesostructures in DNA-Nanorod Self-Assembly

Online version of this news release with related graphics: http://www.bnl.gov/newsroom/news.php?a=11540

Press releases on previous related work: Multi-Component Nano-Structures with Tunable Optical Properties

Switchable Nanostructures Made with DNA

DNA-Based Assembly Line for Precision Nano-Cluster Construction

Media contacts: Karen McNulty Walsh, (631) 344-8350, kmcnulty@bnl.gov, or Peter Genzer, (631) 344-3174, genzer@bnl.gov

One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation for the State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit applied science and technology organization.


[ Back to EurekAlert! ] [ | E-mail | Share 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.


Source: http://www.eurekalert.org/pub_releases/2013-05/dnl-day051613.php

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Thursday, May 16, 2013

Kenyan police clear protesters - and a drove of pigs - from Parliament's gates

Demonstrators are upset with efforts by Kenya's lawmakers to give themselves a pay raise.

By Fredrick Nzwili,?Correspondent / May 14, 2013

Kenyan demonstrators, some chained to each other, gather near the gate of parliament in Nairobi, Kenya, Tuesday. Police fired tear-gas, water cannons and swung their batons at protesters gathered outside Kenya?s parliament building to pile pressure on the country's legislators to drop demands for a salary increment.

Sayyid Azim/AP

Enlarge

Kenyan police?on Tuesday?fired teargas and used water cannons to disperse hundreds of demonstrators who had camped outside Parliament protesting an attempt by lawmakers to increase their own pay.

Skip to next paragraph Fredrick Nzwili

East Africa Correspondent

Fredrick Nzwili is a Kenya-based journalist with 15 years experience in writing for newspapers, international magazines, and international news organizations from Africa. Between 2003 and 2010, he covered the religious dimension of news across the continent. He has also traveled to several African countries on assignments covering peace and conflict, humanitarian work, environment, and interfaith relations and dialogue, among other subjects.?

Recent posts

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The protests began with a march through Nairobi's streets, with demonstrators chanting and carrying placards critical of Members of Parliament (MPs). Protesters had planned to then go inside and "Occupy Parliament," but that proved difficult after police in riot gear surrounded the building.

The police made 15 arrests, but struggled to control the agitated crowd as well as a drove of pigs ??bearing the inscriptions "MPigs" ? which demonstrators brought to the assembly's entrance. They also covered the ground with pig blood, which the pigs mingled in.

?We want to see resources being directed to service delivery, not meeting the wage bill? of lawmakers, says Morris Odhiambo, the director of the Centre for Law Research International.

According to Mr. Odhiambo, many Kenyans were living in deplorable conditions, because their tax money has either been stolen or paid to undeserving people. Nurses and teachers, who have sought pay increases, have not received serious attention from the government, he says. ?The attempt by MPs to increase their salary emphasizes the highest level of impunity.?

Kenya recently decreased the legislators? annual earnings from $120,000 to $75,000 to rein in the burgeoning salary expenses, following the creation of new state offices by a new constitution. Some analysts were already warning government operations may become unsustainable unless the government controls salaries of state officers.

Disregarding the developments, MPs have demanded an upward adjustment of the salary from the current $6,250 back to $10,000 per month, demands that have angered the public.

?If they can?t take the pay, they should resign. We want to rein in their greed. They have not done any work and we are disappointed they are seeking a pay raise even before they work,? says Mr. Simon Muoki, a young environmental rights campaigner.

?This has been our country?s problem for the last 50 years. MPs have forced decisions ? including their pay ??in disregard of the feelings of those who elect them,? says Jedida Wanjiru, an octogenarian at the demonstrations.

For the past month, the lawmakers have arm-twisted the Salaries and Remuneration Commission (SRC), a government body that?s sets salaries of all state officers. With MPs threatening to disband it, the SRC has stuck to its guns.

On Monday?the commission said it will not increase the salary even with threats and intimidation. Sarah Serem, SRC?s chairperson said the commission?s concern was how to reduce the wage bill so that the savings can be used for development work. She said Kenya's total revenue was $11.8 billion, but the country spends $5.7 billion on salaries.

?This amount is not only huge, but it is unaffordable and unsustainable. It stands in the way of the country?s development agenda,? Ms. Serem told a news conference in Nairobi.

Source: http://rss.csmonitor.com/~r/csmonitor/globalnews/~3/spDrDpG8rvM/Kenyan-police-clear-protesters-and-a-drove-of-pigs-from-Parliament-s-gates

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Evolution shapes new rules for ant behavior, research finds

May 15, 2013 ? In ancient Greece, the city-states that waited until their own harvest was in before attacking and destroying a rival community's crops often experienced better long-term success.

It turns out that ant colonies that show similar selectivity when gathering food yield a similar result. The latest findings from Stanford biology Professor Deborah M. Gordon's long-term study of harvester ants reveal that the colonies that restrain their foraging except in prime conditions also experience improved rates of reproductive success.

Importantly, the study provides the first evidence of natural selection shaping collective behavior, said Gordon, who is also a senior fellow at the Stanford Woods Institute for the Environment.

A long-held belief in biology has posited that the amount of food an animal acquires can serve as a proxy for its reproductive success. The hummingbirds that drink the most nectar, for example, stand the best chance of surviving to reproduce.

But the math isn't always so straightforward. The harvester ants that Gordon studies in the desert in southeast Arizona, for instance, have to spend water to obtain water: an ant loses water while foraging, and obtains water from the fats in the seeds it eats.

The ants use simple positive feedback interactions to regulate foraging activity. Foragers wait near the opening of the nest, and bump antennae with ants returning with food. The faster outgoing foragers meet ants returning with seeds, the more ants go out to forage. (Last year, Gordon, Katie Dektar, an undergraduate, and Balaji Prabhakar, a professor of computer science and of electrical engineering at Stanford, showed that the ants' "Anternet" algorithm follows the same rules as the protocols that regulate data traffic congestion in the Internet).

Colonies differ, however, in how they use these interactions to regulate foraging. Some colonies are likely to forage less when conditions are dry. These same, more successful colonies are also more likely to forage more steadily when conditions are good.

Gordon found that it's more important for the ants to not waste water than to forage for every last piece of food. There's no survival cost to this strategy, even though the colonies sometimes forgo foraging for an entire day. Instead, not only do the colonies that hunker down on the bad days live just as long as those that go all out, they also have more offspring colonies.

"Natural selection is not favoring the behavior that sends out the most ants to get the most food, but instead regulating foraging to hold back when conditions are bad," Gordon said. "This is natural selection shaping a collective behavior exhibited by the entire colony."

Gordon's group is still investigating how the ants gauge humidity, but they have determined that the collective response of the colony to conditions is heritable from parent colony to offspring colony. Even though a daughter queen will establish her new colony so far from the parent colony that the two colonies will never interact, the offspring colonies resemble parent colonies in their sensitivity to conditions.

Although the foraging activity of the offspring colonies and the parent colony didn't entirely match up on all days, they were similar on extreme days: parent and offspring colonies made similar judgments about when to lie low or take advantage of ideal conditions.

While the region has experienced 10 to 15 years of protracted drought, and the more restrained colonies will most likely fare better reproductively as that trend continues, Gordon can't yet say whether the emphasis on sustainability evolved in response to climate change pressures.

"What's evolving here are simple rules for how ants participate in a network that regulates the collective behavior of the colony," she said.

The work is published in the May 16 issue of the journal Nature.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/INyGGv6Ez-8/130515131602.htm

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Man City secures 2nd place with 2-0 win at Reading

Associated Press Sports

updated 5:58 p.m. ET May 14, 2013

READING, England (AP) -Manchester City began life without Roberto Mancini with a routine 2-0 victory at rain-sodden Reading on Tuesday to secure second place in the Premier League.

Sergio Aguero put City in front five minutes before halftime and substitute Edin Dzeko wrapped up the win in the 88th minute.

Mancini was fired on Monday - a year to the day since winning the Premier League - after Wigan ended City's last trophy hope this season by winning the FA Cup final on Saturday.

The post-Mancini era began with former assistant Brian Kidd in caretaker charge against relegated Reading.

? 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.


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Europa glory for Blues

PST: A late goal by Branislav Ivanovic made Chelsea the first club ever to win the Champions League and Europa League in successive seasons.

Getty Images

Source: http://nbcsports.msnbc.com/id/51883550/ns/sports-soccer/

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