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Monday, February 20, 2012
Pro-Romney PAC spent $13.5 million in January (Reuters)
[unable to retrieve full-text content]Reuters - Mitt Romney is struggling to regain control of the race for the Republican presidential nomination, but his allies appear ready to offer him a strong crutch for the road ahead.
Seoul begins military drills despite NKorea threat (AP)
[unable to retrieve full-text content]
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Sunday, February 19, 2012
Immigration: Legal, Illegal, And Everyone In Between | NY Essay
The American immigration system has sparked many intense arguments and discussions among the political spectrum of the United States government. Immigration has been occurring between the United States and numerous other countries, such as Mexico, China, India, and Cuba, for many decades, but more recently the number of illegal immigrants has sky-rocketed to profound heights. There is an estimated twelve million illegal immigrants currently residing within the United States borders. Everyday more and more illegal immigrants enter into United States to take part in both the government?s benefits and job placing. The processes involved in both legal and illegal immigration needs to be reformed and become more restrictive towards those illegal immigrants who truly have no desire to apply for citizenship.
Caps or restrictions need to be placed upon the time allotment and amount of visas, green cards, temporary work cards, and the lottery programs, which allow immigrants to cross over the
border into the United States. Immigrants with temporary-work visas need to evacuate America and return to their home countries when their allotted working term has been completed. The family reunification process also needs to be reformed to include only the reunion of nuclear family members, which consists of children and spouses. Extended family petitions need to be disregarded from the 1965 Immigration Act because they create serious problems concerning chain migration. The practice of chain migration greatly affects the annual allowance of immigrants into the United States.
The United States current immigration policies hinder the many economic advancements and interests of America. The United States cannot continue allowing millions of immigrants to integrate into the country each year. Standards and precedent needs to be established in order to filter through the wide selection of immigrants wanting to enter into America. Immigrants should be provided with the basic tools,?
Source: http://nyessay.com/law/immigration-legal-illegal-and-everyone-in-between/
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Impact Of Online Gaming On The Students | NY Essay
Introduction
Online gaming has emerged as a popular and successful source of entertainment and play for people of all ages, especially for the students. It refers to the games that are played over some forms of computer network, typically on the internet. These games are played online, in which you can connect with multiple players. It is normally platform independent, relying on the web browser and appropriate plug-in.
? ?
? ? It is one of the best inventions that is made ever by human beings. It has the ability to link players together. It has been one of the most popular activities in entertaining for younger people. Because of this, almost everybody is into it. Its fantastic characteristic makes a lot of students become hook on it. It provides entertainment and at the same time, online socialization with different kind of people. But sometimes, it causes negative effects.
It has two kinds of impacts: the good and bad. It depends on the player itself.
Studies show that online gaming is a major source of addiction, especially to college students. Because of its ability to link multi-players together, most students become hooked on it. They keep on playing and playing because it gives them thrill until it becomes an addiction.
This research study shows how online gaming can be an addiction and its possible effects on the students.
Background of the study
For most gamers, the era of online games started with the release of the four-player game Doom in 1994. However, the very first multiplayer game was actually developed in 1969 by Rick Blomme who wrote a two-player game. Then, in 1979, Roy Trubshaw and Rich Bartle developed the first multi-user dungeon (MUD) interactive game. MUDs were role-playing computer games that run on a bulletin board system or Internet server. Through MUDs, players see textual descriptions of rooms, objects, other characters, and computer-controlled creatures in a virtual world. The introduction of MUDs saw the?
Source: http://nyessay.com/internet/impact-of-online-gaming-on-the-students/
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Saturday, February 18, 2012
Guide To Affordable Web Hosting
[unable to retrieve full-text content]Having a state-of-the-art website with the latest technical details incorporated into it will not suffice the purpose at all if there is no reliable web hosting service to support the online representation of your business enterprise.
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Sandia National Laboratories researchers find energy storage 'solutions' in MetILs
![[ Back to EurekAlert! ]](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tG-9sE0zcXsXb8SsYAto36uPg_R-q3ZJn8HmNaur9q2xSN8fULthkb1ibB5-oko3JOGb1nkn1R3fyjboNSnfSar_GRBmovIK7wYAVjILs=s0-d){kind=small}
Public release date: 17-Feb-2012[ | E-mail |
Share ] Contact: Stephanie Hobby
shobby@sandia.gov
505-844-0948
DOE/Sandia National Laboratories
ALBUQUERQUE, N.M. Sandia researchers have developed a new family of liquid salt electrolytes, known as MetILs, that could lead to batteries able to cost-effectively store three times more energy than today's batteries.
The research, published in Dalton Transactions, might lead to devices that can help economically and reliably incorporate large-scale intermittent renewable energy sources, like solar and wind, into the nation's electric grid.
The grid was designed for steady power sources, making fluctuating electricity from intermittent renewable energy difficult to accommodate. Better energy storage techniques help even out the flow of such fluctuating sources, and Sandia researchers are studying new ways to develop a more flexible, cost-effective and reliable electric grid with improved energy storage.
"The U.S. and the world need significant breakthroughs in battery technology for renewable energy sources to replace today's carbon-based energy systems," said Anthony Medina, director of Sandia's Energetic Components Realization program. "MetILs are a new, promising battery chemistry that might provide the next generation of stationary storage battery technology, replacing lead-acid and lithium-ion batteries and providing significantly higher energy storage density for these applications."
For the past 20 years, lithium-ion batteries have been at the forefront of energy storage research. Their compact, lightweight design is well suited for cell phones, laptop computers and personal electronics, but lithium-ion batteries are expensive and degradation issues limit their use in stationary, high-capacity application on the nation's electric grid.
Sandia researcher and inorganic chemist Travis Anderson is leading a team developing the next generation of flow batteries. A flow battery pumps a solution of free-floating charged metal ions, dissolved in an electrolyte substance with free-floating ions that conducts electricity from an external tank through an electrochemical cell to convert chemical energy into electricity. Flow batteries are rapidly charged and discharged by changing the charge state of the electrolyte, and the electroactive material can be easily re-used many times. Anderson said flow batteries can sustain more than 14,000 cycles in the lab, equivalent to more than 20 years of energy storage, which would be unusual in a lithium-ion battery.
However, flow battery grid storage systems are roughly the size of a house and can cost more than equivalent lithium-ion batteries. The goal of researchers is to make flow batteries smaller and cheaper, while increasing the amount of energy stored for a given volume, or energy density.
Flow batteries have been fielded in the U.S., Japan and Australia. A number of systems up to 25 MW are in the process of being demonstrated under the American Recovery and Reinvestment Act (ARRA) administered by DOE's Energy Storage Systems Research program. Zinc bromine and vanadium redox systems are among the top contenders. But the materials involved are moderately toxic, and vanadium is subject to major price fluctuations. In addition, the aqueous solution limits the amount of material that can be dissolved and how much energy can be stored, and outside temperature can hurt performance.
Sandia is pioneering research on flow batteries that avoid these problems by not using water. Anderson assembled a multidisciplinary team of experts from the Labs, including electrochemist David Ingersoll, organic chemist Chad Staiger and chemical technologists Harry Pratt and Jonathan Leonard. What they've designed is a new family of electrochemically reversible, metal-based ionic liquids, or MetILs, which are based on inexpensive, non-toxic materials that are readily available within the U.S., such as iron, copper and manganese.
"Instead of dissolving the salt into a solvent, our salt is a solvent," Anderson said. "We're able to get a much higher concentration of the active metal because we're not limited by saturation. It's actually in the formula. So we can cost-effectively triple our energy density, which drastically reduces the necessary size of the battery, just by the nature of the material."
The electrochemical efficiency, or ability to reverse charge, in MetILs is far greater than anything else published to date. The team has prepared nearly 200 combinations of cations, anions and ligands, and of those, five outperform the electrochemical efficiency of ferrocene, which has long been considered the gold standard.
A common problem when mixing positively and negatively charged species is that these species will start aggregating together, eventually causing the solution to turn gummy and clog the battery membrane and electrode surfaces. The team addressed that challenge by developing asymmetric cations, or positively charged ions, that resemble a soccer ball. In this analogy, the black pentagons represent negatively charged areas and the white hexagons represent positively charged regions. Such an arrangement lowers the melting point by preventing the ionic liquid constituents from bonding and becoming a solid, while the partial charge still allows electrons to flow freely through the cell to generate a current.
The team is funded by the Department of Energy's Office of Electricity Delivery and Energy Reliability. Imre Gyuk, energy storage systems program manager for that office, has been a champion of Sandia's efforts and provided the necessary funding.
"The MetILs approach represents an ingenious, out-of-the-box solution to the cathode/electrolyte paradigm. Because it is based on readily available, inexpensive precursors, it may well lead to innovative, cost-effective storage systems with major impacts on the entire U.S. grid," said Gyuk.
The findings apply to new flow battery cathode materials. The next step for the Sandia team is to find similar materials for flow battery anodes, and researchers are encouraged by their progress.
"There are three things you're juggling at the same time, and they aren't always related: viscosity, electrical conductivity and the fundamental electrochemical efficiency," Anderson said. "The excitement of having all three things go right at the same time, it's like finding the treasure, but without the map. We're creating that map, and we're very excited by the possibilities."
###
Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin company, for the U.S. Department of Energy's National Nuclear Security Administration. With main facilities in Albuquerque, N.M., and Livermore, Calif., Sandia has major R&D responsibilities in national security, energy and environmental technologies, and economic competitiveness.
Sandia news media contact: Stephanie Hobby, shobby@sandia.gov, 505-844-0948
[ | 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: 17-Feb-2012[ | E-mail |
Share ] Contact: Stephanie Hobby
shobby@sandia.gov
505-844-0948
DOE/Sandia National Laboratories
ALBUQUERQUE, N.M. Sandia researchers have developed a new family of liquid salt electrolytes, known as MetILs, that could lead to batteries able to cost-effectively store three times more energy than today's batteries.
The research, published in Dalton Transactions, might lead to devices that can help economically and reliably incorporate large-scale intermittent renewable energy sources, like solar and wind, into the nation's electric grid.
The grid was designed for steady power sources, making fluctuating electricity from intermittent renewable energy difficult to accommodate. Better energy storage techniques help even out the flow of such fluctuating sources, and Sandia researchers are studying new ways to develop a more flexible, cost-effective and reliable electric grid with improved energy storage.
"The U.S. and the world need significant breakthroughs in battery technology for renewable energy sources to replace today's carbon-based energy systems," said Anthony Medina, director of Sandia's Energetic Components Realization program. "MetILs are a new, promising battery chemistry that might provide the next generation of stationary storage battery technology, replacing lead-acid and lithium-ion batteries and providing significantly higher energy storage density for these applications."
For the past 20 years, lithium-ion batteries have been at the forefront of energy storage research. Their compact, lightweight design is well suited for cell phones, laptop computers and personal electronics, but lithium-ion batteries are expensive and degradation issues limit their use in stationary, high-capacity application on the nation's electric grid.
Sandia researcher and inorganic chemist Travis Anderson is leading a team developing the next generation of flow batteries. A flow battery pumps a solution of free-floating charged metal ions, dissolved in an electrolyte substance with free-floating ions that conducts electricity from an external tank through an electrochemical cell to convert chemical energy into electricity. Flow batteries are rapidly charged and discharged by changing the charge state of the electrolyte, and the electroactive material can be easily re-used many times. Anderson said flow batteries can sustain more than 14,000 cycles in the lab, equivalent to more than 20 years of energy storage, which would be unusual in a lithium-ion battery.
However, flow battery grid storage systems are roughly the size of a house and can cost more than equivalent lithium-ion batteries. The goal of researchers is to make flow batteries smaller and cheaper, while increasing the amount of energy stored for a given volume, or energy density.
Flow batteries have been fielded in the U.S., Japan and Australia. A number of systems up to 25 MW are in the process of being demonstrated under the American Recovery and Reinvestment Act (ARRA) administered by DOE's Energy Storage Systems Research program. Zinc bromine and vanadium redox systems are among the top contenders. But the materials involved are moderately toxic, and vanadium is subject to major price fluctuations. In addition, the aqueous solution limits the amount of material that can be dissolved and how much energy can be stored, and outside temperature can hurt performance.
Sandia is pioneering research on flow batteries that avoid these problems by not using water. Anderson assembled a multidisciplinary team of experts from the Labs, including electrochemist David Ingersoll, organic chemist Chad Staiger and chemical technologists Harry Pratt and Jonathan Leonard. What they've designed is a new family of electrochemically reversible, metal-based ionic liquids, or MetILs, which are based on inexpensive, non-toxic materials that are readily available within the U.S., such as iron, copper and manganese.
"Instead of dissolving the salt into a solvent, our salt is a solvent," Anderson said. "We're able to get a much higher concentration of the active metal because we're not limited by saturation. It's actually in the formula. So we can cost-effectively triple our energy density, which drastically reduces the necessary size of the battery, just by the nature of the material."
The electrochemical efficiency, or ability to reverse charge, in MetILs is far greater than anything else published to date. The team has prepared nearly 200 combinations of cations, anions and ligands, and of those, five outperform the electrochemical efficiency of ferrocene, which has long been considered the gold standard.
A common problem when mixing positively and negatively charged species is that these species will start aggregating together, eventually causing the solution to turn gummy and clog the battery membrane and electrode surfaces. The team addressed that challenge by developing asymmetric cations, or positively charged ions, that resemble a soccer ball. In this analogy, the black pentagons represent negatively charged areas and the white hexagons represent positively charged regions. Such an arrangement lowers the melting point by preventing the ionic liquid constituents from bonding and becoming a solid, while the partial charge still allows electrons to flow freely through the cell to generate a current.
The team is funded by the Department of Energy's Office of Electricity Delivery and Energy Reliability. Imre Gyuk, energy storage systems program manager for that office, has been a champion of Sandia's efforts and provided the necessary funding.
"The MetILs approach represents an ingenious, out-of-the-box solution to the cathode/electrolyte paradigm. Because it is based on readily available, inexpensive precursors, it may well lead to innovative, cost-effective storage systems with major impacts on the entire U.S. grid," said Gyuk.
The findings apply to new flow battery cathode materials. The next step for the Sandia team is to find similar materials for flow battery anodes, and researchers are encouraged by their progress.
"There are three things you're juggling at the same time, and they aren't always related: viscosity, electrical conductivity and the fundamental electrochemical efficiency," Anderson said. "The excitement of having all three things go right at the same time, it's like finding the treasure, but without the map. We're creating that map, and we're very excited by the possibilities."
###
Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin company, for the U.S. Department of Energy's National Nuclear Security Administration. With main facilities in Albuquerque, N.M., and Livermore, Calif., Sandia has major R&D responsibilities in national security, energy and environmental technologies, and economic competitiveness.
Sandia news media contact: Stephanie Hobby, shobby@sandia.gov, 505-844-0948
[ | 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.
Source: http://www.eurekalert.org/pub_releases/2012-02/dnl-snl021712.php
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Friday, February 17, 2012
The Place Where You Get the Best Essays and High Mark | Biology ...
Writing essay could be one of the most difficult tasks gotten by many college students. The difficulties come because of various problems either related to students? limited sources or other reasons. Because of the difficulties, it is easy to assume that their essay cannot satisfy their teachers so that they get bad marks for the task as a consequence. Of course they cannot blame the teachers because of their bad marks. One thing that their teachers know is that the teachers have taught them very well and writing an essay must be a piece of cake for them. Finally, they just need to find a place where to buy essays. It seems to be the only way they have because of limited time they have.
If you belong to such students above, you should think some important information before you decide to buy an essay. You should find the right place that provides you excellent essays with affordable price. In other words, they must be cheap essays that are written just like your own. Yes, they are cheap custom essays. Besides, often times you are given an assignment which is considered more difficult. The assignment is writing a response essay that requires you to understand a literature and response it in form of essay by using your own language. With the best help, you will get no more difficulties to finish your essays cheaply. Just buy your essays and get highest marks.
Source: http://chancenecessity.blogspot.com/2012/02/place-where-you-get-best-essays-and.html
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