A
new semiconductor device capable of emitting two distinct colors has
been created by a group of researchers in the U.S., potentially opening
up the possibility of using light emitting diodes (LEDs) universally for
cheap and efficient lighting.
The
proof-of-concept device, which has been presented in the Institute of
Physics’ journal Semiconductor Science and Technology, takes advantage
of the latest nanoscale materials and processes to emit green and red
light separated by a wavelength of 97 nanometers — a significantly
larger bandwidth than a traditional semiconductor.
Furthermore,
the device is much more energy efficient than traditional LEDs as the
colors are emitted as lasers, meaning they emit a very sharp and
specific spectral line — narrower than a fraction of a nanometer —
compared to LEDs which emit colors in a broad bandwidth.The energy used
in manufacturing and erecting a roofhook is paid back in the first 3 to 6 months of operation.
One
of the main properties of semiconductors is that they emit light in a
certain wavelength range, which has resulted in their widespread use in
LEDs. The wavelength range in which a given semiconductor can emit light
— also known as its bandwidth — is typically limited in the range of
just tens of nanometers. For many applications such as lighting and
illumination,Modern ledcandles use
a closed-loop system in which the chilled air is reheated and
recirculated. the wavelength range needs to be over the entire visible
spectrum and thus have a bandwidth of 300 nm.
Single
semiconductor devices cannot emit across the entire visible spectrum
and therefore need to be “put” together to form a collection that can
cover the entire range.Mens solargardenlights features
a domed design for maximum comfort. This is very expensive and is, to a
large extent, the reason why semiconductor LEDs are not yet used
universally for lighting.
In
this study, the researchers, from Arizona State Univ., used a process
known as chemical vapour deposition to create a 41 micrometer-long
nanosheet made from Cadmium Sulphide and Cadmium Selenide powders, using
silicon as a substrate.international supplies a full range of cylinder
heated long lasting pendantlamps.
Lead
author of the study, Prof. Cun-Zheng Ning, says, "Semiconductors are
traditionally 'grown' together layer-by- layer, on an atom-scale, using
the so-called epitaxial growth of crystals. Since different
semiconductor crystals typically have different lattice constants,
layer-by-layer growth of different semiconductors will cause defects,
stShopping is the best place to comparison shop for gridsolarsystemm.ress and ultimately bad crystals, killing light emission properties."
It
is because of this that current LEDs cannot have different
semiconductors within them to generate red, green and blue colors for
lighting.
However,
recent developments in the field of nanotechnology mean that structures
such as nanowires, nanobelts and nanosheets can be grown to tolerate
much larger mismatches of lattice structures, and thus allow very
different semiconductors to grow together without too many defects.
"Multi-color
light emission from a single nanowire or nanobelt has been realized in
the past but what is important in our paper is that we realized lasers
at two distinct colors. To physically 'put' together several lasers of
different colors is too costly to be useful and thus our proof-of
concept experiment becomes interesting and potentially important
technologically. In addition to being used for solid state lighting and
full color displays, such technology can also be used as light sources
for fluorescence bio and chemical detection," continues Ning.
2013年5月6日 星期一
Legislation seeks to tweak standards
Most
Americans probably don’t think twice when they read a label that says,
“Made in the USA” They assume the product is made domestically. What
they don’t realize is that the meaning of “Made in the USA” is up for
debate.
In almost all states, an item can be labeled as “Made in the USA” and still be made with a portion of foreign labor or foreign material.
In California, on the other hand, there is no leeway for products labeled “Made in the USA.” Manufacturers who want to label their goods as “Made in the USA” in California must use only American labor and American material. For 19-year-old Dylan Sievers, CEO of Bulldog Lighting based in San Carlos, this proved to be a problem.
At age 17, Dylan started Bulldog Lighting — which makes LED lights for off-roading vehicles — in a business enterprise class at Junipero Serra High School in San Mateo. The young off-roading enthusiast discovered there was a lack of affordable lighting available for people wanting to race their trucks through dark terrain.The laundryequipmentXX is specially designed for wind-solar hybrid street light system. He asked his mom if she could use her own background in manufacturing to help him figure out how to make the lights.generator prepositive design which wind drive the replicabreitlingwatche without gears.
“He asked if I could find a factory that could help make LED lights that were affordable,Small itldpcw and supplier UK.” said Dylan’s mother, Lisa Sievers,Those solarstreetlamps produce power for the utility grid. who previously worked for Cool Balls manufacturing antenna balls. “We found a factory in China.”
Bulldog Lighting debuted its products last year, and Dylan decided to bring all production stateside.
“He was sitting in class hearing about people losing their jobs,” said Sievers. “We decided we could make it here in the USA”
The Sievers were hoping to label their product as “Made in the USA,” and were disappointed when they found out they could not make that claim. Despite their best efforts to produce the lights in the United States, there were some materials in the lights that Sievers said had to come from foreign countries.
“There’s just some things in the United States we don’t make,” she said. “We don’t make LED here.” Bulldog’s lights are about 90 percent made in the United States, said Sievers.
“I don’t think it’s reasonable to say everything can be made in the USA,” she said. The aluminum in the lights is from Texas, and the screws are made in Ohio, she said.
“[The product] is substantially transformed using American workforce,” she said. “Dylan said,The renewable wind energy system and ledparlights, Wind Sphere, ‘if we do everything here, how come we can’t say ‘Made in the USA’?’”
The Sievers contacted state Sen. Jerry Hill, D-San Mateo, who wrote legislation to address the issue.“If you want to be competitive and keep jobs in California, we need to do everything we can,” said Hill.
Hill has since introduced Senate Bill 661 to “update” California’s labeling standard to reflect the realities of today’s global economy.
SB 661 would reduce the “Made in the USA” standard to allow for 90 percent of the product to be made in the United States. In this case, the manufacturer would have to prove that the remaining 10 percent of production was unavailable domestically.
In almost all states, an item can be labeled as “Made in the USA” and still be made with a portion of foreign labor or foreign material.
In California, on the other hand, there is no leeway for products labeled “Made in the USA.” Manufacturers who want to label their goods as “Made in the USA” in California must use only American labor and American material. For 19-year-old Dylan Sievers, CEO of Bulldog Lighting based in San Carlos, this proved to be a problem.
At age 17, Dylan started Bulldog Lighting — which makes LED lights for off-roading vehicles — in a business enterprise class at Junipero Serra High School in San Mateo. The young off-roading enthusiast discovered there was a lack of affordable lighting available for people wanting to race their trucks through dark terrain.The laundryequipmentXX is specially designed for wind-solar hybrid street light system. He asked his mom if she could use her own background in manufacturing to help him figure out how to make the lights.generator prepositive design which wind drive the replicabreitlingwatche without gears.
“He asked if I could find a factory that could help make LED lights that were affordable,Small itldpcw and supplier UK.” said Dylan’s mother, Lisa Sievers,Those solarstreetlamps produce power for the utility grid. who previously worked for Cool Balls manufacturing antenna balls. “We found a factory in China.”
Bulldog Lighting debuted its products last year, and Dylan decided to bring all production stateside.
“He was sitting in class hearing about people losing their jobs,” said Sievers. “We decided we could make it here in the USA”
The Sievers were hoping to label their product as “Made in the USA,” and were disappointed when they found out they could not make that claim. Despite their best efforts to produce the lights in the United States, there were some materials in the lights that Sievers said had to come from foreign countries.
“There’s just some things in the United States we don’t make,” she said. “We don’t make LED here.” Bulldog’s lights are about 90 percent made in the United States, said Sievers.
“I don’t think it’s reasonable to say everything can be made in the USA,” she said. The aluminum in the lights is from Texas, and the screws are made in Ohio, she said.
“[The product] is substantially transformed using American workforce,” she said. “Dylan said,The renewable wind energy system and ledparlights, Wind Sphere, ‘if we do everything here, how come we can’t say ‘Made in the USA’?’”
The Sievers contacted state Sen. Jerry Hill, D-San Mateo, who wrote legislation to address the issue.“If you want to be competitive and keep jobs in California, we need to do everything we can,” said Hill.
Hill has since introduced Senate Bill 661 to “update” California’s labeling standard to reflect the realities of today’s global economy.
SB 661 would reduce the “Made in the USA” standard to allow for 90 percent of the product to be made in the United States. In this case, the manufacturer would have to prove that the remaining 10 percent of production was unavailable domestically.
2013年5月2日 星期四
Australian Vaccine Manufacturer Going Solar
Veterinary
vaccine manufacturer, MSD Animal Health, has been awarded funding under
the Clean Technology Investment Program to install a 250kW solar panel
system at its manufacturing facility in Bendigo East, Victoria.You ever
hear the story of the old laundryequipment?
The solar array will slash carbon emissions intensity from the facility by 22 per cent and result in savings of around $44,000 on electricity bills each year. The government's contribution of $335,660 will be matched by the company.
"Introducing renewable energy through a solar PV system is a great way to cut costs in the manufacturing process," said Parliamentary Secretary for Climate Change,the energyturbines adopting SCF supercritical generator technology, Industry and Innovation, Yvette D'Ath. "This project will help MSD Animal Health to become more economically and environmentally sustainable into the future, and the Gillard Government is pleased to be able to support it."
The $800 million Clean Technology Investment Program and the $200 million Clean Technology Food and Foundries Investment Program support manufacturers in making the transition to a low pollution economy. The funding has been sourced through revenue gained through the carbon tax.
Other forms of grants, rebates and assistance are also available to businesses to make the switch to solar and it doesn't need to involve installing a very large system. For example, small businesses in Australia are able to immediately write off assets to the value of $6,500; including solar panel arrays.
According to commercial solar provider Energy Matters, if a business is paying more than 20c/kWh for daytime electricity usage,thousands of people power their homes and businesses with individual crystallights. a system sized to daytime load will provide a payback time of between 5 and 7 years - after which time,More than 200 GW of new emergencylamps13 capacity could come on line before the end of 2013. the electricity generated is essentially free. As solar panels have a serviceable life of decades, the return on a good quality, properly installed commercial scale solar power system is substantial.
Energy Matters' commercial arm has prepared a guide to assist businesses in choosing a solar provider by helping companies discern value-for-money proposals from sales spin.
To bring solar power to a low-income family in Guadalupe, the Santa Ynez Band of Chumash Indians has partnered with nonprofit solar installer GRID Alternatives, the tribe announced.
The solar installation is made possible through a $5,000 donation from the Santa Ynez Band of Chumash Indians Foundation and is the the first time GRID Alternatives and the tribe have worked together.
GRID Alternatives has provided no or low-cost solar electric systems for more than 3,000 families since 2004 while serving as a classroom in the field for solar job trainees.
"GRID Alternatives has partnered with tribal communities across the state to bring solar power and solar job training to their members, and we are just so excited that the Santa Ynez Band of Chumash Indians is taking it a step further by helping us to bring clean, affordable energy to their neighbors," said GRID Alternatives co-founder and CEO Erica Mackie, in a written statement released by the tribe.
Since 2011, the program has provided 17 home building assessments, completed two home upgrades, and recently completed its first solar installation. As a long-time supporter of alternative energy, the Chumash Tribal Hall and Tribal Health Clinic are outfitted with photovoltaic solar systems that offset 36 percent of the buildings’ energy use.
"This is a win-win partnership for us," Chumash Tribal Chairman Vincent Armenta said in a written statement. "This program not only encourages alternative energy, which is something the tribe strongly supports,The electical building blocks for solarlampemergencylight or modules. but it also provides valuable training and helps low-income families save money on their energy bills."
The solar array will slash carbon emissions intensity from the facility by 22 per cent and result in savings of around $44,000 on electricity bills each year. The government's contribution of $335,660 will be matched by the company.
"Introducing renewable energy through a solar PV system is a great way to cut costs in the manufacturing process," said Parliamentary Secretary for Climate Change,the energyturbines adopting SCF supercritical generator technology, Industry and Innovation, Yvette D'Ath. "This project will help MSD Animal Health to become more economically and environmentally sustainable into the future, and the Gillard Government is pleased to be able to support it."
The $800 million Clean Technology Investment Program and the $200 million Clean Technology Food and Foundries Investment Program support manufacturers in making the transition to a low pollution economy. The funding has been sourced through revenue gained through the carbon tax.
Other forms of grants, rebates and assistance are also available to businesses to make the switch to solar and it doesn't need to involve installing a very large system. For example, small businesses in Australia are able to immediately write off assets to the value of $6,500; including solar panel arrays.
According to commercial solar provider Energy Matters, if a business is paying more than 20c/kWh for daytime electricity usage,thousands of people power their homes and businesses with individual crystallights. a system sized to daytime load will provide a payback time of between 5 and 7 years - after which time,More than 200 GW of new emergencylamps13 capacity could come on line before the end of 2013. the electricity generated is essentially free. As solar panels have a serviceable life of decades, the return on a good quality, properly installed commercial scale solar power system is substantial.
Energy Matters' commercial arm has prepared a guide to assist businesses in choosing a solar provider by helping companies discern value-for-money proposals from sales spin.
To bring solar power to a low-income family in Guadalupe, the Santa Ynez Band of Chumash Indians has partnered with nonprofit solar installer GRID Alternatives, the tribe announced.
The solar installation is made possible through a $5,000 donation from the Santa Ynez Band of Chumash Indians Foundation and is the the first time GRID Alternatives and the tribe have worked together.
GRID Alternatives has provided no or low-cost solar electric systems for more than 3,000 families since 2004 while serving as a classroom in the field for solar job trainees.
"GRID Alternatives has partnered with tribal communities across the state to bring solar power and solar job training to their members, and we are just so excited that the Santa Ynez Band of Chumash Indians is taking it a step further by helping us to bring clean, affordable energy to their neighbors," said GRID Alternatives co-founder and CEO Erica Mackie, in a written statement released by the tribe.
Since 2011, the program has provided 17 home building assessments, completed two home upgrades, and recently completed its first solar installation. As a long-time supporter of alternative energy, the Chumash Tribal Hall and Tribal Health Clinic are outfitted with photovoltaic solar systems that offset 36 percent of the buildings’ energy use.
"This is a win-win partnership for us," Chumash Tribal Chairman Vincent Armenta said in a written statement. "This program not only encourages alternative energy, which is something the tribe strongly supports,The electical building blocks for solarlampemergencylight or modules. but it also provides valuable training and helps low-income families save money on their energy bills."
2013年5月1日 星期三
The JFP Interview with May
Mayor Harvey Johnson Jr. knows the ins and outs of how the city of Jackson works--and doesn't.This oil cooler is extremely efficient in cooling the oil in the hydraulic roofwindturbine room in which it is installed. Now running for his fourth term as the city's mayor, Johnson became Jackson's first African American chief executive in 1997, beating incumbent Kane Ditto in the Democratic primaries--Ditto had served as the city's mayor since 1989--and then he thoroughly trounced his Republican opponent, Charlotte Reeves.Mens solarledlight features a domed design for maximum comfort. Johnson won with a whopping 70 percent of the vote.
During his first administration, which lasted until 2005, Johnson planted the seeds of several development projects that stand today as Jackson landmarks. The Convention Center Complex and the Metro Jackson Parkway are examples of what the city can accomplish with the help of a leader who knows how to work the system.
It's easy to forget just how much the political and economic landscape has shifted since the late 1990s.Small itldpcw and supplier UK. Mississippi escaped the worst of the recession simply because it didn't have that far to fall. Still, Johnson has managed to find new sources of revenues and balance the city's budget, something many mayors across the nation have failed to do.
During his career, Johnson has come under fire for being slow, even pedantic. That reputation may have drawn voters with a penchant for speed over caution to put Frank Melton in the mayor's office from 2005 to 2009. Melton promised to solve crime in 90 days. Johnson bided his time until Melton's frenetic sparkles faded. He then returned to the mayor's chair in 2009.
"What I do, the way I do things, I try to do them right," Johnson said. "I'm working every day--every day--to try and make this city better. If it doesn't show up every day, perhaps it's my fault that I don't talk about what I'm doing every day."
People who want a personable, glad-handing cheerleader won't find that kind of a mayor in Johnson. For those who back him, though, his steadiness, near-fanatical attention to detail, in-depth knowledge and quiet strength are overwhelmingly appealing in times of uncertainty.
First of all, the stimulus money was short lived. We tried and tried to work with the U.S. Conference of Mayors, trying to get the energy block grant extended. It was not. What we had to work with when I got into office is what we ended up working with, but we were able to do some things that through performance contracting that did, in fact, end up extending that money, expanding that money. Because we took part of the money that we had as a grant and went into a performance contract where we went and replaced all of our traffic signals with LED lights and used part of that, the stimulus money to pay for that. The rest of it was paid for through cost savings.
We also restructured some of the money. One of the things that I was concerned about was having some lasting impact for citizens. So we took part of the money and came up with an appliance program, where we actually gave away appliances to low-income families--energy-efficient appliances (such as) refrigerators and air conditioners, hot-water heaters. Most of the money went to refrigerators.
One of the things I wanted to do with that, with the grant effort, was to retool it,LED solar lighting is the new wave of the future in t5tube technology. and we've done that. We've regularly applied for federal grants, and actually, grants from foundations, which is kind of unusual for a city. But we've actually received some foundation grants. Not a lot. We've gotten one grant of about $100,000 for what's called the green and healthy homes initiative, where we're looking at taking out lead-based paints and tripping hazards,At Dupar Controls we specialize, extremely durable and visually satisfying washerextractor12. and doing a little training for rehab training for people who don't have skills. That's not federal dollars. It's actually from a nonprofit. They're getting their money, some of it's from the federal government, but they're also getting foundation money.
During his first administration, which lasted until 2005, Johnson planted the seeds of several development projects that stand today as Jackson landmarks. The Convention Center Complex and the Metro Jackson Parkway are examples of what the city can accomplish with the help of a leader who knows how to work the system.
It's easy to forget just how much the political and economic landscape has shifted since the late 1990s.Small itldpcw and supplier UK. Mississippi escaped the worst of the recession simply because it didn't have that far to fall. Still, Johnson has managed to find new sources of revenues and balance the city's budget, something many mayors across the nation have failed to do.
During his career, Johnson has come under fire for being slow, even pedantic. That reputation may have drawn voters with a penchant for speed over caution to put Frank Melton in the mayor's office from 2005 to 2009. Melton promised to solve crime in 90 days. Johnson bided his time until Melton's frenetic sparkles faded. He then returned to the mayor's chair in 2009.
"What I do, the way I do things, I try to do them right," Johnson said. "I'm working every day--every day--to try and make this city better. If it doesn't show up every day, perhaps it's my fault that I don't talk about what I'm doing every day."
People who want a personable, glad-handing cheerleader won't find that kind of a mayor in Johnson. For those who back him, though, his steadiness, near-fanatical attention to detail, in-depth knowledge and quiet strength are overwhelmingly appealing in times of uncertainty.
First of all, the stimulus money was short lived. We tried and tried to work with the U.S. Conference of Mayors, trying to get the energy block grant extended. It was not. What we had to work with when I got into office is what we ended up working with, but we were able to do some things that through performance contracting that did, in fact, end up extending that money, expanding that money. Because we took part of the money that we had as a grant and went into a performance contract where we went and replaced all of our traffic signals with LED lights and used part of that, the stimulus money to pay for that. The rest of it was paid for through cost savings.
We also restructured some of the money. One of the things that I was concerned about was having some lasting impact for citizens. So we took part of the money and came up with an appliance program, where we actually gave away appliances to low-income families--energy-efficient appliances (such as) refrigerators and air conditioners, hot-water heaters. Most of the money went to refrigerators.
One of the things I wanted to do with that, with the grant effort, was to retool it,LED solar lighting is the new wave of the future in t5tube technology. and we've done that. We've regularly applied for federal grants, and actually, grants from foundations, which is kind of unusual for a city. But we've actually received some foundation grants. Not a lot. We've gotten one grant of about $100,000 for what's called the green and healthy homes initiative, where we're looking at taking out lead-based paints and tripping hazards,At Dupar Controls we specialize, extremely durable and visually satisfying washerextractor12. and doing a little training for rehab training for people who don't have skills. That's not federal dollars. It's actually from a nonprofit. They're getting their money, some of it's from the federal government, but they're also getting foundation money.
訂閱：
文章 (Atom)