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Self-Healing Circuits Could Lead to Longer-Lasting Electronics

A team of engineers at the University of Illinois have figured out how to create self-healing circuits in electronics and batteries, a discovery that could lead to longer equipment life and make a nice dent in the piles of e-waste plaguing the buy ultram generic planet.

As electronics have become more complex, one small circuit failure can render a device useless, especially since it is hard or often impossible to diagnose where that failure occurred to fix it. Nancy Sottos, an engineer working on the project said:

"In general there's not much avenue for manual repair. Sometimes you just can't get to the inside. In a multilayer integrated circuit, there's no opening it up. Normally you just replace the whole chip. It's true for a battery too. You can't pull a battery apart and try to find the source of the failure."

The solution her team came up with was an army of microcapsules about 10 microns in diameter dispersed along a circuit. When a crack occurs in the circuit, the microcapsules break open and release a liquid metal that fills in the crack and restores the electrical flow. The time between a failure and the viagra 50 mg online microcapsules filling the crack is only a few microseconds.

In tests, 90 percent of the samples were healed to 99 percent of their original conductivity. It also require zero human intervention. Only the microcapsules intercepted by a crack opened while the others remained intact.

The engineers see this breakthrough as especially useful for air and spacecraft where miles of cheap viagra india conductive wire would have to be gone through to link for you discount drug viagra diagnose a failure. The team, which originally used microcapsules to create self-healing polymers, want to see what other applications they may have.

via Physorg


Using LCDs to Collect Energy

Keeping electronic devices powered is an ongoing concern, particularly as the number of electronic devices proliferates. Researchers at UCLA have developed a liquid crystal display (LCD) that incorporates photovoltaic polarizers that can convert sunlight, ambient light, and even its own backlight into electricity to power the device.

Polarizers are what makes the display in an LCD function, by controlling the amount of light that passes through from the backlight to make the display. The new material, called a polarizing organic photovoltaic film increases the efficiency of display and allows for charging of the device in bright light.

Obviously, the backlight isn't going to provide enough light to power the device infinitely long. But the researchers say that much of the energy lost from backlights can be saved with the new polarizer. "From the point of view of viagra to order energy use, current LCD polarizers are inefficient, the researchers said. A device's backlight can consume 80 to 90 percent of the device's power. But as much as 75 percent of the light generated is lost through the wow it's great viagra endurance polarizers. A polarizing organic photovoltaic LCD could recover much of that unused energy."

via: UCLA Newsroom


Improved Cooling for Computers

Researchers at the US Department of Energy's Sandia National Laboratory have developed a new method for cooling microprocessors that is more effective and requires less energy than present air cooling methods. The Air Bearing Heat Exchanger technology, which has been dubbed the "Sandia Cooler," offers a solution to purchase levitra the "thermal brick wall" which has been limiting microprocessor speed.

Cooling is buy cialis no prescription usually limited by the heat exchange taking place through the stationary air film that is found on all materials. The Sandia Cooler improves works by rotating the cooling fins to achieve a ten-fold reduction in the boundary layer of motionless air on the surface of the heat sink which increases heat transfer. Instead of having stationary heat sink fans with air being blown across them with a fan, the heat sink itself spins, which leads to increased heat transfer efficiency.

While the Sandia Cooler is initially being investigated for computer cooling, if it is possible to effectively scale the technology, it could also have applications for building cooling and air conditioning. "If Air Bearing Heat Exchanger technology proves amenable to size scaling, it has the potential to decrease overall electrical power consumption in the U.S. by more than seven percent," according to the inventor, Jeff Koplow.

link: A Fundamentally New Approach to Air-cooled Heat Exchangers (pdf)

via: EERE News and Solar Thermal Magazine


Set-Top Boxes Are the #1 Household Energy Drain

A recent study by the National Resources Defense Council finds that cable and digital recording devices are now "the single largest electricity drain in many American homes." The study found that "In 2010, set-top boxes in the United States consumed approximately 27 billion kilowatt-hours of electricity, which is equivalent to the annual output of nine average (500 MW) coal-fired power plants."

This power consumption translates to roughly $3 billion in annual electricity costs paid by consumers, as well as being responsible for the release of purchase cialis 5 mg 16 million metric tons of CO2 emissions each year. Furthermore, according to the NRDC report, an average HD set-top cable box and HD-DVR uses more energy (446 kWh/year) than an average 21 cubic foot Energy Star refrigerator (415 kWh/year).

Even worse than the "standby drain" of electricity used by equipment in a supposedly "off" position, many of these television set-top boxes - which include cable and satellite equipment, digital video recorders (DVR), and the like - are on viagra from india 24 hours a day. Power strips can be useful for turning off these vampire loads, but consumers are reluctant to use those when they want their DVRs to be able to record programs.

NRDC points out that these devices could be designed to be more energy efficient, but that the service companies who provide these to consumers feel little incentive to click now best way to use viagra do so, since it is the end users who pay for that power use.

image: CC-BY 2.0 by Scott Thomson

via: New York Times


Bloomberg Plans to Turn Old NYC Landfills into Solar Power Plants

Mayor Bloomberg has outlined some new additions to his PlaNYC, which aims to cut New York City's emissions by 30 percent by 2030.  One of the major new projects will be the building of solar power plants on old landfill sites.

New York City has about 3,000 acres of shuttered landfills and i recommend levitra australia through this plan 250 of those will be outfitted with solar power.  Once those plants come online, they'll have a capacity of 50 MW, enough to power 50,000 homes.

The revised PlaNYC also includes a gradual cessation of the use of #4 and #6 heating oils.  The dirty oils produce more soot than all of the cars and trucks in the city combined.  The city will help building owners and neighborhoods transition to cleaner heating, with #6 being phased out by 2015 and #4 by 2030.

Another big goal of the plan is to create the New York City Energy Efficiency Corp with $37 million of federal stimulus money.  The corporation's main purpose will be provide financing to generic cialis and online consultation property owners for renewable energy installations and efficiency improvements.

via Crain's and Gothamist

Image via nycmayorsoffice

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