On top of one of them is a diode as the active medium.

This is one of many possible ways in which a molecular level diode transistor might be synthesized by organic chemistry.

It would be all atoms pulsating in unison, emitting light of one color, one frequency.

Substantive inaction by some large greenhouse gas emitting countries represents a serious threat to our existence.

Using more energy inevitably means emitting more CO2 at a time when climate change has become a critical global issue.

This is due to the special properties of III V semiconductors that allow for the implementation of light emitting devices.

Indeed, there is excellent potential for low cost solar power, zero emitting coal based technologies, and safe and reliable nuclear power.

Because of the significant role agriculture plays in emitting greenhouse gases, any reductions that can be made by farmers are important.

It is called so because the logic gating function (e.g., AND) is performed by a diode network and the amplifying function is performed by a transistor (in contrast with RTL and TTL).

So while I'm talking to you, the seats you are sit on are currently emitting some invisible and odorless toxic gas. Sorry for that.

Ever since Copenhagen, a majority of the main greenhouse gas emitting countries have been setting out ambitious goals without hedging them with restrictive conditions.

James keeps a radio with him, which alerts him to the presence of creatures by emitting static, allowing him to detect them even through the thick fog.

Energy efficiency, energy savings, renewable energy and less greenhouse gas emitting fossil fuel and related advanced technologies Option 1 Research and development relating to transport and industry

Right now, rich countries are changing the world s climate by emitting billions of tons of carbon dioxide each year from the use of coal, oil, and natural gas.

Negotiators will gather for another round of UN talks on September 28 in Bangkok, and we are considering a smaller meeting of major emitting and most vulnerable nations in November.

Despite all of the optimistic talk about wind, solar, geothermal, and other sustainable, non carbon emitting energy sources, no alternative is remotely ready to shoulder the energy burden currently borne by fossil fuels.

As Sri Lanka s government pointed out, That means low emitting countries like us could not emit more because our space has already been exploited by developed or global heavy polluting countries without our consent.

That day will arrive sooner if governments spend a lot more money on low carbon energy research, which is woefully inadequate. Every nation should ideally commit to spending 0.05 of GDP exploring non carbon emitting energy technologies.

Just when we know we need to be learning to live on the surface of our planet, off the power of sun, wind and waves, we are frantically digging to get at the dirtiest, highest emitting stuff imaginable.

When you open this for growing oil palms you're creating CO2 volcanoes that are emitting so much CO2 that my country is now the third largest emitter of greenhouse gasses in the world, after China and the United States.

Yet, within the complexity, there is a very simple truth for a decade or more, we have known that it was risky to go on emitting greenhouse gases, yet we have utterly failed to take credible steps to stop.

If placed in close proximity to an object emitting neutrons, or its container, the foil may be activated sufficiently that radio spectroscopy of resulting activation products in the foil could yield low fidelity information on the nature of the neutron flux.

Investing in R D of non carbon emitting energy technologies would leave future generations able to make serious and yet economically feasible and advantageous cuts. A new global warming treaty should mandate spending 0.05 of GDP on R D in the future.

In the first situation, an approved fissile materials container without external marking, but with a seal, is declared to be loaded with neutron emitting fissile material, and this is moved from a store, through a neutron detecting portal, which registers a positive. Here

This could be achieved if all countries committed to spending 0.05 of GDP on research and development of non carbon emitting energy technologies. The cost a relatively minor 25 billion per year would be almost 10 times cheaper than the Kyoto Protocol (and many more times cheaper than a standard Kyoto II).

Blue white thermal emission is not often seen, except in stars (the commonly seen pure blue colour in a gas flame or a welder's torch is in fact due to molecular emission, notably by CH radicals (emitting a wavelength band around 425 nm, and is not seen in stars or pure thermal radiation).

If every country committed to spending 0.05 of its GDP exploring non carbon emitting energy technologies, this would translate into 25 billion per year, or ten times more than what the world spends now. Yet, the total also would be seven times cheaper than the Kyoto Protocol, and many times cheaper than the Copenhagen Protocol is likely to be.

They do this by reducing or eliminating completely the number of harmful particles in the air in the vicinity of the emitting source (but they do not target the source of the emission itself). 2) Domestic (or indoor) purifiers are often performed via a filter. This technique efficiently cleans the air coming out of the machine.