Posts tagged England
Buff Asst. La Crosse Coach Nielsen Claims Bronze Medal At World Cup
Jul 22nd
OSHAWA, Ontario – For the ninth consecutive time since the Federation of International Lacrosse Women’s Lacrosse World Cup began in 1982, Australia is taking home a medal – its first bronze since the 1993 games.
After ending pool play with a 2-2 record, Australia entered the Championship Bracket a No. 3 seed. In the quarterfinals, Australia easily took down Scotland 26-2. In a rematch with the host team in the semifinals, Australia suffered only its second ever loss to Canada at the World Cup. With the loss behind them, Australia was determined to keep its medal-winning streak alive and was victorious in the bronze medal game, defeating England 12-6.
University of Colorado assistant lacrosse coach Hannah Nielsen has now won one of each medal in her three World Cup appearances with the Australian National Team. The Adelaide, Australia native has also earned a spot on the All-World Team at back-to-back Cups. In 2005, Nielsen scored a key goal to push Australia over the United States in the Gold Medal game. In 2009, she led the team with 12 goals and 13 assists as the Aussies fell by a single goal to the U.S. in the title game. In the 2013 games, she led the team with 24 total points, including 10 goals and 12 assists.
“I am so proud of Hannah and all she has accomplished not only in this last World Cup, but her entire lacrosse career,” CU head lacrosse coach Ann Elliott said. “To be able to play in the World Cup and represent your home country is such an incredible honor and one I know Hannah cherishes and works extremely hard for. This particular World Cup was a difficult one for Hannah as their team had to overcome the loss of one of their leaders, Jen Adams, to an ACL tear right before the tournament started. However, to watch Hannah battle through that and step up to help lead her team to the bronze medal and making the All-World Team was extremely special and I could not be more proud of all she has worked for and achieved.”
Quarterfinals (Thursday, July 18): Australia allowed just two goals against Scotland to advance to the semifinals. The No. 3 seeded Aussies stomped No. 11 seed Scotland 26-2 in the highest scoring game of the first two rounds of the Championship Bracket. Australia came out on a 9-0 run, not allowing a Scottish goal until nearly the halfway point in the first half. Scotland would not score again until the final 15 seconds of the match. Australia outshot Scotland 38-6 and forced 24 Scottish turnovers. Nielsen scored two goals and contributed a game-high four assists in the win.
Semifinals (Friday, July 19): Host team Canada marked several firsts during the 2013 World Cup. They earned their first ever win against Australia in World Cup play with a 13-12 pool play victory. In the teams’ rematch in the semifinals, Canada picked up its second, downing Australia 11-7 to advance to its first final. Just as she did in their first match-up, Nielsen tied for a team-high in scoring, netting two goals and contributing an assist. Canada dominated the offense, outshooting Australia 21-9 in the first-half alone on their way to 34 total shots, compared to the Aussies’ 28. Australia never had the lead, but Nielsen helped them get back within two late in the first half, and kept the match competitive by scoring Australia’s final two goals.
Bronze Medal Game (Saturday, July 20): Though they fell behind early against England as Sarah Taylor gave the Brits two quick goals, Australia was not content in going home empty handed. The Aussies claimed the bronze medal with a definitive 12-6 win over England. Australia led England 13-7 in both draw controls and ground balls. Nielsen tied for game-high scoring with four goals and one assist. Her first goal of the game helped the Aussies to a 4-3 lead. Her next came off a free position shot in the final minutes of the first half to help Australia take an 8-4 lead into halftime. She got the Aussies on the board again in the first 40 seconds of the second half and again with 11:19 remaining.
CU lacrosse coach Elliott was in attendance for the final three days of the tournament to support Nielsen and three other former Northwestern teammates that represented the USA.
“The World Cup is an amazing event that this year brought together 19 countries,” Elliott said. “The growth of our sport continues to amaze me.”
Australia continues to be a dominant force in women’s lacrosse, having won gold medals in 1986 and 2005 and earning four silver (1982, 1997, 2001 and 2009) and three bronze (1989, 1993 and 2013) medals. With a 19-5 championship victory this year, rival United States won its second straight and seventh overall World Cup title. In its first ever title game, Canada capped its most successful World Cup tournament with a silver medal.
About the FIL
The Federation of International Lacrosse (FIL) is the international governing body for men’s and women’s lacrosse. The FIL currently has 45 member nations and sanctions five World Championships (women’s and men’s field, women’s and men’s U19 field and men’s indoor.) The FIL is responsible for the governance and integrity of all forms of lacrosse and provides responsive and effective leadership to support the sports’ development throughout the world.
All-World Team
Attack
Katrina Dowd – United States
Lindsey Munday – United States
Katie Rowan – United States
Dana Dobbie – Canada
Midfield
Laura Merrifield – England
Hannah Nielsen – Australia
Sarah Albrecht – United States
Stacey Morlang Sullivan – Australia
Defense
Amber Falcone – United States
Katie Guy – Canada
Alicia Wickens – Australia
Goalkeeper
Devon Wills – United States
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Marlee Horn Graduate Assistant SID University of Colorado O: 303.492.7525 C: 719.821.0689 marlee.horn@colorado.edu CUBuffs.com
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CU study: Graphene membranes may lead to enhanced natural gas production, less CO2 pollution
Oct 8th
The findings are a significant step toward the realization of more energy-efficient membranes for natural gas production and for reducing carbon dioxide emissions from power plant exhaust pipes.
Mechanical engineering professors Scott Bunch and John Pellegrino co-authored a paper in Nature Nanotechnology with graduate students Steven Koenig and Luda Wang detailing the experiments. The paper was published Oct. 7 in the journal’s online edition.
The research team introduced nanoscale pores into graphene sheets through ultraviolet light-induced oxidative “etching,” and then measured the permeability of various gases across the porous graphene membranes. Experiments were done with a range of gases including hydrogen, carbon dioxide, argon, nitrogen, methane and sulphur hexaflouride — which range in size from 0.29 to 0.49 nanometers — to demonstrate the potential for separation based on molecular size. One nanometer is one billionth of a meter.
“These atomically thin, porous graphene membranes represent a new class of ideal molecular sieves, where gas transport occurs through pores which have a thickness and diameter on the atomic scale,” said Bunch.
Graphene, a single layer of graphite, represents the first truly two-dimensional atomic crystal. It consists of a single layer of carbon atoms chemically bonded in a hexagonal “chicken wire” lattice — a unique atomic structure that gives it remarkable electrical, mechanical and thermal properties.
“The mechanical properties of this wonder material fascinate our group the most,” Bunch said. “It is the thinnest and strongest material in the world, as well as being impermeable to all standard gases.”
Those characteristics make graphene an ideal material for creating a separation membrane because it is durable and yet doesn’t require a lot of energy to push molecules through it, he said.
Other technical challenges will need to be overcome before the technology can be fully realized. For example, creating large enough sheets of graphene to perform separations on an industrial scale, and developing a process for producing precisely defined nanopores of the required sizes are areas that need further development. The CU-Boulder experiments were done on a relatively small scale.
The importance of graphene in the scientific world was illustrated by the 2010 Nobel Prize in physics that honored two scientists at Manchester University in England, Andre K. Geim and Konstantin Novoselov, for producing, isolating, identifying and characterizing graphene. Scientists see a myriad of potential for graphene as research progresses, from making new and better display screens and electric circuits to producing tiny biomedical devices.
The research was sponsored by the National Science Foundation; the Membrane Science, Engineering and Technology Center at CU-Boulder; and the DARPA Center on Nanoscale Science and Technology for Integrated Micro/Nano Electromechanical Transducers at CU-Boulder.
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UNEXPECTED ADHESION PROPERTIES OF GRAPHENE MAY LEAD TO NEW NANOTECHNOLOGY DEVICES
Aug 23rd
The new findings — that graphene has surprisingly powerful adhesion qualities — are expected to help guide the development of graphene manufacturing and of graphene-based mechanical devices such as resonators and gas separation membranes, according to the CU-Boulder team. The experimentsshowed that the extreme flexibility of graphene allows it to conform to the topography of even the smoothest substrates.
Graphene consists of a single layer of carbon atoms chemically bonded in a hexagonal chicken wire lattice. Its unique atomic structure could some day replace silicon as the basis of electronic devices and integrated circuits because of its remarkable electrical, mechanical and thermal properties, said Assistant Professor Scott Bunch of the CU-Boulder mechanical engineering department and lead study author.
A paper on the subject was published online in the Aug. 14 issue of Nature Nanotechnology. Co-authors on the study included CU-Boulder graduate students Steven Koenig and NarasimhaBoddeti and Professor Martin Dunn of the mechanical engineering department.
“The real excitement for me is the possibility of creating new applications that exploit the remarkable flexibility and adhesive characteristics of graphene and devising unique experiments that can teach us more about the nanoscale properties of this amazing material,” Bunch said.
Not only does graphene have the highest electrical and thermal conductivity among all materials known, but this “wonder material” has been shown to be the thinnest, stiffest and strongest material in the world, as well as being impermeable to all standard gases. It’s newly discovered adhesion properties can now be added to the list of the material’s seemingly contradictory qualities, said Bunch.
The CU-Boulder team measured the adhesion energy of graphene sheets, ranging from one to five atomic layers, with a glass substrate, using a pressurized “blister test” to quantify the adhesion between graphene and glass plates.
Adhesion energy describes how “sticky” two things are when placed together. Scotch tape is one example of a material with high adhesion; the gecko lizard, which seemingly defies gravity by scaling up vertical walls using adhesion between its feet and the wall, is another. Adhesion also canplay a detrimental role, as in suspended micromechanical structures where adhesion can cause device failure or prolong the development of a technology, said Bunch.
The CU research, the first direct experimental measurements of the adhesion of graphene nanostructures, showed that so-called “van der Waals forces” — the sum of the attractive or repulsive forces between molecules — clamp the graphene samples to the substrates and also hold together the individual graphene sheets in multilayer samples.
The researchers found the adhesion energies between graphene and the glass substrate were several orders of magnitude larger than adhesion energies in typical micromechanical structures, an interaction they described as more liquid-like than solid-like, said Bunch.
The CU-Boulder study was funded primarily by the National Science Foundation and the Defense Advanced Research Projects Agency.
The importance of graphene in the scientific world was illustrated by the 2010 Nobel Prize in physics that honored two scientists at Manchester University in England, Andre K. Geim and Konstantin Novoselov, for producing, isolating, identifying and characterizing graphene.
There is interest in exploiting graphene’s incredible mechanical properties to create ultrathin membranes for energy-efficient separations such as those needed for natural gas processing or water purification, while graphene’s superior electrical properties promise to revolutionize the microelectronics industry, said Bunch.
In all of these applications, including any large-scale graphene manufacturing, the interaction that graphene has with a surface is of critical importance and a scientific understanding will help push the technology forward, he said.