Definition Of Wind Energy
| July 23, 2011 | Posted by admin under Wind Energy |
High Definition Home Theatre
Author: Steve Salt
Today is an exciting time to be a home cinema fan. With the advent of high-definition home video and audio, it is now possible to view films at home that will look and sound at least as good as they did in the cinema. To achieve this, you will need to make sure your home cinema setup meets the requirements of reading, converting and displaying a high-def source.
To begin with, you will need a hi-def source. Many cable and satellite packages offer hi-def channels, but many channels use large amounts of compression to squeeze multiple high-def channels into a limited amount of bandwidth. This causes images to have compression artefacts, such as macro blocking, mosquito noise or banding. Audio can also be affected, with very low or high frequencies clipped and complex parts of the soundtrack sounding "muddy".
The same problem is present on the new "download" services that allow you to download and watch a film for a fixed price. Although less noticeable, the problems of compression are still visible. Lastly, some DVD players will provide "up-scaling" of standard DVD's, and while this can be an improvement on letting your TV upscale the image, it's not a true high-definition signal, and will appear soft and blurred.
The best source for Hi-Definition content is from a Blu-Ray disc, where there is enough space to store the image without introducing noticeable compression artefacts, and to hold completely lossless sound. Look for a player with an internet connection for easy updates to the firmware, or alternatively consider a Sony Playstation 3 console, which is also a very high-quality Blu-Ray player.
With a hi-def system, only one cable, HDMI, is required to transmit both picture and sound. A HDMI cable is a digital connection, so there are fewer problems from noise or interference. Beware overpriced cables; the digital signal means expensive multi-layered insulation is not necessary. Pay no more than you would for good computer DVI cable, on which the HDMI standard is based.
The hi-def signal will first go into your home-cinema amplifier, which will need a HDMI input. The amplifier needs to be capable of decoding the sound formats used by the Blu-Ray disc. The most common formats are Dolby Digital Plus and DTS-HD, these are updates of the formats used on DVD's, and all modern home cinema amps should decode them. Look out for Dolby True HD and DTS-HD Master Audio support, these are new formats for maximum-quality lossless sound, but only the latest or more expensive amps have support for these right now. Lastly you may see LPCM audio tracks. These are lossless and uncompressed, so no decoding is required and all amps can play them.
Your amp should have a HDMI output that will allow you to connect it to your TV or Projector. With the amp handling the audio, the video signal is fed back out and into your display. To properly function your display will need to be "HDCP compliant", HDCP stands for HD "Copy Protection", and only HDMI inputs with the built in HDCP technology can decode HD video. All newer displays have this, but some early TV's and projectors had HDMI sockets that missed out the HDCP chip.
There are several different resolutions that can be called High Definition. 720p and 1080i are used by some TV channels and also hi-def video games. The highest standard is 1080p, and is used by Blu-Ray movies. Most new displays will handle all three formats, but when buying a TV or projector, check the native resolution, the number of physical lines of picture it can display. TV's that only have a native resolution of 720 will be forced to scale a 1080p signal down, which will reduce the picture detail and may introduce artefacts.
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What is a definition of Wind Energy?
Im doing a physics report on alternative energy sources. Why we are doing basic science in physic, i am unaware, but i still need an answer (:
Thanks!
Energy received from the movement of the wind across the earth. This energy is a result of the heating of our oceans, earth, and atmosphere by the sun.
Definitions and descriptions of these typesof alternate energy: solar,geothermal, hydro,wind,hydrogen,biomass?
I have a report due tomorrow… I need to define and describe the following alternate energy types:
solar, geothermal, hydro, wind, hydrogen, and biomass.
Solar energy is energy that comes directly from the sun. There’s two basic forms of current solar, solar thermal and photovoltaic. Solar-thermal heats a liquid that causes pressure to build and that turns a turbine. (turbines spin in magnets creating electricity) Photovoltaic gets electricity from the sun directly. Silicon has the property that it sheds electrons when sunlight hits it. There’s no fancy mechanical hookup or anything. The only trick is to have a wire that collects the spare electrons that are electricity.
Geothermal is heat from the earth, this would be geysers, volcanoes and other trapped heated pockets within the earth. This heat creates pressure, that’s used to turn a turbine.
Hydro is water, dams mostly, where water is stored at a high level and released through a turbine that produces electricity.
Wind is the wind mills you see, that’s directly hooked to a turbine creating electricity.
Hydrogen is a gas, and I don’t think belongs on this list. It’s a fuel and not a type of alternative energy. If she wants it in there I’d say that it’s for direct burning through an internal combustion engine, or through fuel cells. Fuel cells take Hydrogen and run them through a membrane that strips electrons while mixing the Hydrogen with Oxygen. (H20)
Biomass is burning, or converting used plant material creating heat and turning a turbine to get energy. they can make a fuel from biomass that can be burned later.
What’s the difference between Conventional, Conventional Alternatives, and Non-conventional energy alternative?
I’m doing some research and have trouble distinguishing the difference between these three types of energy sources.
So far, I have Conventional energy widely used/practical energy sources like oil, gas and coal. My assumption is that they’re the primary ‘standard’ energy sources the world currently uses for their electricity and power since the industrial revolution.
I’m having trouble with the next two energy sources..
Conventional Alternatives, I put that at energy sources that produce less environmental waste and could be used to replace conventional energy sources. An example would be biofuels being used to replace oil/gas for cars. I guess Nuclear power could go under this energy source as it could be used to replace coal in North America but places like France have 90% of their cities powered by Nuclear – would this mean it’s a conventional energy source for France and a conventional alternative to North America? I don’t know..
As for Non-conventional energy.. I put this at energy sources that produce the least amount of environmental waste but are completely unpractical to implement. My example would be hydrogen powered cars because there is no current infrastructure to support Hydrogen fuel gas stations if consumers were to buy them.
I’m just purely guessing here – please share if you disagree or agree with my definition. Also If anybody knows what category other energy sources like wind, solar, and thermal energy belong to, I’ll be super grateful.
Hey Fud, you have a bit of a mess there with definitions. Let me try to explain some of it. The term, “Conventional Energy,” is basically what you have written already. In most cases, it refers to fossil fuel based energies. You have to be careful with this, I’ll explain. Alternative Energy is any energy source that is used to replace a conventional energy source in order to offset the negative side effects of the conventional source. A simple example of this is switching from coal heat in an older home to natural gas. It is less polluting, more efficient, and costs less. Another example, however, was when coal became an alternative energy source for wood in industrial applications in the last century. So in a way, coal could fit into the category of alternative energy, depending on the context.
Your next one, “Conventional Alternative,” is not something I’ve ever heard thrown around in our circles here. It sounds like the news men who refer to airline pilots as, “Fully Qualified.” Most of the airlines I know do not have any partially qualified ones hanging around, but still that phrase shows up on the news a lot. My guess is that coal alternative I just mentioned might be one of those, a conventional fuel used in an alternative way, but I would just be guessing too. I think Non conventional would be the same as Alternative. Conventional Alternative sounds like Jumbo Shrimp to me.
The phrase you haven’t mentioned is the one that is most common in our circles here, “Renewable Energy.” This refers to any energy source that does not deplete with use, it, “renews itself,” over time, hence the name. Solar, wind, hydro and geothermal are the ones I am familiar with.
If you’re wondering where I’m getting all this, it’s because about 10 years ago we decided to convert our home over to wind and solar power. So our home would fit in the alternative category as well as the renewable category. People that grow their own tomatoes rather than buying them at the market know a great deal about soil ph, watering, sunlight and fertilizer, they have to. People that grow their own electrons instead of buying them from the power company have a similar curse, they want to know where each one comes from and where it’s used. So in the end, you learn a bunch of stuff that you can’t really use anyplace else.
I suspect if you’ve been reading these things in popular periodicals like Popular Science, Home and Garden, or the newspaper, you’re just getting caught up in their vernacular on the subject. If you want to go to the source, I will include some places below you can look for more information. Hope this helps. Good luck, and take care.
Is this an accurate definition for life?
Life is just an adaptive and proximal reflection of water, wind, and fire, which follows the natural laws of the universe.
All life adapts and evolves to the environment around it. All life requires water to be sustained. Without wind, life would never exist, as all motion is just a complex interpretation of the distrubition of momentum and energy produced by wind. Also, watch yourself breath… seems familiar. Without fire, life would not exist. Fire produces two things… Heat and light, wonder where we would be without them? And all these things follow the natural laws of the universe.
Okay Ant. The motion of electrons is quite irrelevant to wind in the sense that I’m thinking. And I wonder what the origin of wind is? Maybe it’s a distant byproduct of the momentum created from the big bang, translated through the miracle that is our sun? Possibly the same source as the motion of your electrons? And the bacteria living in the polar ice caps… what do you think the temperature of these ice caps are? Around -50, maybe even -100? Well guess what, thats quite warm when compared to other places in this universe… Where does this warmth come from I suppose… Oh! the sun, which happens to be a giant ball of… Fire!
Sometimes we need to oversimplify to gain a larger understanding of the whole situation, instead of getting lost in the little, pointless things
Adagio – It all comes from right here right now, and it only became visible when I opened my eyes for the first time. So yes, it comes from within
Ant, you fail to see the bigger picture. The sun makes this stuff called solar wind. It shoots out into space in all directions, and some of it happens to hit earth. This force is what perpetuates your little pressure systems, which in turn produces the wind that we feel when out in the miracle that is nature. Oh and how about you follow your little rule and use a dictionary.
fire (fīr)
n. Burning fuel or other material: a cooking fire; a forest fire.
Hmmmm sounds familiar! Oh yeah its your definition of the… sun!
You are an elitist prick, and the contributions you make to humanity are pathetically backwards. I would say your a worthless piece of shit but I’m way too melodramatic for that.
Life is greater than any definition.
What are some examples of Nuclear Energy?
Ok I have a school project due tomorrow (January 5, 2010) and we have to make a poster with the name of the energy, a picture showing an example, and the definition. I have all the titles and definitions but only 6 out of the 7 pictures. I need some examples for Nuclear Energy. These are what I used for the others. Please tell what I can use for Nuclear Energy really soon.
Electrical Energy- T.V.
Radiant Energy- Burning Candle
Chemical Energy- An Unlit Match
Mechanical Energy- Wind Turbine
Acoustic Energy- Radio
Thermal Energy- Boiling Water
For Nuclear my friend was using a Power Plant but I didn’t think it would work. Please tell me if it would and I’ll use it but if you have a better one I’ll use it. Thanx if you can help.
Every nuclear power plant in the world uses nuclear fission to heat water, to make steam, to drive a turbine that generates electricity.
Nuclear weapons (usually fission-fusion-fission) are very vigorous uses of nuclear energy.
Our Sun and every other healthy main sequence star is just a massive nuclear furnace, where hydrogen is being fused into helium, releasing the energy that we use as heat, light, and is we wanted, conversion to solar-electric power.