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Solve : Storage Density of 2.2 Petabytes Per gram? |
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Answer» This was first published in January this year. I missed it. Maybe it is also new to you. Using the DNA as a model, some claim you can get PERPETRATES in a teaspoon. No word on when you can get some for you iPhone. SternisheFan sends news of researchers who encoded an MP3, a PDF, a JPG, and a TXT file into DNA, along with another file that explains the encoding. The researchers estimate the storage density of this technique at 2.2 petabytes per GRAM (abstract). "We knew we needed to make a code using only short strings of DNA, and to do it in such a way that creating a run of the same letter would be impossible. ... Researchers Achieve Storage Density of 2.2 Petabytes Per Gram of DNA Petabytes of MP3 I think they should be measuring in Volume vs Weight... Since Storage of 2.2 Petabytes is an allocation of data which consumes a space/volume based on storage density. Using per Gram just seems wrong because weight varies based on gravity, yet volume is more of a constant such as 1 cubic cm if gold and 1 cubic cm of aluminum. And volume is more important than weight in real world application. Such as someone wouldnt mind a small device that is heavy at say 20 lbs that stores lots of data, but would mind if it was a full size suit CASE sized box of the same weight. I cant see any real world use of use of dna for storing music etc, and its prone to decay in which the slightest amount of background radiation can alter it and corrupt your files. Quote from: DaveLembke on December 11, 2013, 03:11:13 PM Using per Gram just seems wrong because weight varies based on gravityThe gram is not a measurement of weight. it is a measurement of mass. the mass of something does not change based on gravity. Quote yet volume is more of a constant such as 1 cubic cm if gold and 1 cubic cm of aluminum. And volume is more important than weight in real world application. Such as someone wouldnt mind a small device that is heavy at say 20 lbs that stores lots of data, but would mind if it was a full size suit case sized box of the same weight.The article is talking about storing data through DNA. basing a measurement per-volume is only useful when the storage mechanism is dependent on volume, just as with a standard Hard disk the storage is based on storage in a given area. The difference is that the measurement is measuring the efficacy of storage within a mass. If you add more data with this technique, you add more mass; whereas storing data on a conventional hard drive simply 'rearranges' what is already there magnetically. Quote I cant see any real world use of use of dna for storing music etc, and its prone to decay in which the slightest amount of background radiation can alter it and corrupt your files."We've created a code that's error tolerant using a molecular form we know will last in the right conditions for 10 000 years, or possibly longer"Quote The gram is not a measurement of weight. it is a measurement of mass. the mass of something does not change based on gravity. http://www.thefreedictionary.com/gram [French gramme, from Late Latin gramma, a small weight, from Greek, something written, small weight; see gerbh- in Indo-European roots.] -------------------------------------------------------------------------------- http://en.wikipedia.org/wiki/Gram Quote Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre, and at the temperature of melting ice"[2] (later 4 °C), a gram is now defined as one one-thousandth of the SI base unit, the kilogram, or 1×10−3 kg, which itself is defined as being equal to the mass of a physical prototype preserved by the INTERNATIONAL Bureau of Weights and Measures. Its measured on a scale based on pressure from gravity.The Gram is the Metric unit measuring Mass. The metric unit of weight is the Newton, because Weight represents the force of gravity acting on a given mass, and the unit of Force used in the Metric system is the Newton. Note that the Pound (lb) is the imperial unit of Force, and not Mass. This why pressure is measured in imperial using Pounds per square inch. In metric such forces are measured in pascals, with a pascal being one newton per square meter. (not one kilogram per square meter, given that a kilogram measures mass). EDIT: Looking into it, it seems the Pound might be used as both a unit of Mass as well as a unit of Force in the Imperial System. Well, a lot of talk about gram. The intent of the research was to see how small a useful storage median might be. Not an example of how to use the word gram. If we were talking about DVD storage, we would focus on the media size and mass. The the PLAYBACK device, unless the media is non-removable would not matter. It is about how must can be stored on a device DVD media is measured in Gigabyte. The article talked about Petabytes. A petabyte (symbol: PB) is 10^15 bytes of digital information. Quote The prefix peta indicates the fifth power of 1000 and means 1015 in the International System of Units (SI), and therefore 1 petabyte is one quadrillion (short scale) bytes, or 1 billiard (long scale) bytes.http://en.wikipedia.org/wiki/Petabyte That would be a lot of DVDs Piratical? How about a library of all literature ever written in Ind-European languages. Wait, make that all human languages ever spoken or written. Nice for doing homework. 1000000000000000 123456789012345 |
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