Actually, when I look at the data, I can't see how the researchers came to any conclusion. The total temperature change they are talking about is 1 degree celcius. The graph only begins to move up that extra 1/2 degree in the last 80 or ninety years. In fact, the earlier data from tree rings and shells appears to indicate a downward trend until about 1910. The 14 places that the newer data is taken from is all near populated areas, which certainly have other influences such as heat sources in winter and heat from airconditioning in Winter, cars, asphalt, fewer trees etc. Does 1/2 degree even fall within the accuracy of the study? . Perhaps the headline should read "People seem to maybe have possibly made it a little warmer near populated areas over the last 90 years, or not maybe huh?" Here is a link to the graph, the data is close at hand. huh!
Lots of folks on this thread are missing the most general concept of this technology. I'll esplain it to you Lucy! One emits a single cycle, just one, thats a monocycle, aimed at 2ghz (for instance) but not terribly tightly controlled so it bleeds over a very wide "band" with the highest power pretty well centered around 2 ghz. The monocycle (pulse) lasts one half of a billionth of a second.Then nothing at all, no carrier no nuthin for about 900 billionths of a second or 1000 billionths of a second then another monocycle is sent. If the space is 900 pico seconds then its a 1, if its a 1000 picoseconds its a 0. (or some similar timing)The wide band width only encodes 1 bit per pusle even though it covers the huge width (500 mghz to 5 ghz for instance)The wide bandwith makes the radio cheap to build and easier to detect the very weak (250 microwatts) and very short pulse. The encoding is done by timing the spaces between pulses. Since we are talking billions of potential pulses per second, there is substantial room for different timing sequences so that many devices can occupy the same band at the same time. It's the timing in the billionths of seconds and the ability to detect the signal at all that are the technological breakthroughs. A very significant factor is the very low power achieved by not maintaining a carrier wave. It makes a solar powered cell phone a real possibility.
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Actually, when I look at the data, I can't see how the researchers came to any conclusion. The total temperature change they are talking about is 1 degree celcius. The graph only begins to move up that extra 1/2 degree in the last 80 or ninety years. In fact, the earlier data from tree rings and shells appears to indicate a downward trend until about 1910. The 14 places that the newer data is taken from is all near populated areas, which certainly have other influences such as heat sources in winter and heat from airconditioning in Winter, cars, asphalt, fewer trees etc. Does 1/2 degree even fall within the accuracy of the study? . Perhaps the headline should read "People seem to maybe have possibly made it a little warmer near populated areas over the last 90 years, or not maybe huh?" Here is a link to the graph, the data is close at hand. huh!
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http://www.cru.uea.ac.uk/cru/data/temperature/nhs
Lots of folks on this thread are missing the most general concept of this technology.
I'll esplain it to you Lucy!
One emits a single cycle, just one, thats a monocycle, aimed at 2ghz (for instance) but not terribly tightly controlled so it bleeds over a very wide "band" with the highest power pretty well centered around 2 ghz. The monocycle (pulse) lasts one half of a billionth of a second.Then nothing at all, no carrier no nuthin for about 900 billionths of a second or 1000 billionths of a second then another monocycle is sent. If the space is 900 pico seconds then its a 1, if its a 1000 picoseconds its a 0. (or some similar timing)The wide band width only encodes 1 bit per pusle even though it covers the huge width (500 mghz to 5 ghz for instance)The wide bandwith makes the radio cheap to build and easier to detect the very weak (250 microwatts) and very short pulse. The encoding is done by timing the spaces between pulses. Since we are talking billions of potential pulses per second, there is substantial room for different timing sequences so that many devices can occupy the same band at the same time. It's the timing in the billionths of seconds and the ability to detect the signal at all that are the technological breakthroughs. A very significant factor is the very low power achieved by not maintaining a carrier wave. It makes a solar powered cell phone a real possibility.