THE WHATIS.COM WORD-OF-THE-DAY August 6, 2003 quantum dot
________________ SPONSORED BY: Microsoft The Quick Guide to Windows Server 2003. Get the latest information on installation, new features and training. Click here! http://WhatIs.com/r/0,,16725,00.htm?microsoft ________________ TODAY'S WORD: quantum dot See our complete definition with hyperlinks at http://whatis.techtarget.com/definition/0,,sid9_gci518016,00.html A quantum dot is a particle of matter so small that the addition or removal of an electron changes its properties in some useful way. All atoms are, of course, quantum dots, but multi-molecular combinations can have this characteristic. In biochemistry, quantum dots are called redox groups. In nanotechnology, they are called quantum bits or qubits. Quantum dots typically have dimensions measured in nanometers, where one nanometer is 10-9 meter or a millionth of a millimeter. The fields of biology, chemistry, computer science, and electronics are all of interest to researchers in nanotechnology. An example of the overlapping of these disciplines is a hypothetical biochip, which might contain a sophisticated computer and be grown in a manner similar to the way a tree evolves from a seed. In this scenario, the terms redox group and qubit are equally applicable; it is hard to classify such a chip as either animate or inanimate. The quantum dots in a biochip would each account for at least one data bit, and possibly several. In the extreme, the position of a single electron in a quantum dot might attain several states, so that a quantum dot could represent a byte of data. Alternatively, a quantum dot might be used in more than one computational instruction at a time. Other applications of quantum dots include nanomachines, neural networks, and high-density memory or storage media. ______________________ RELATED TERMS: matter http://whatis.techtarget.com/definition/0,,sid9_gci865252,00.html electron http://whatis.techtarget.com/definition/0,,sid9_gci212046,00.html nanotechnology http://whatis.techtarget.com/definition/0,,sid9_gci213444,00.html qubit http://whatis.techtarget.com/definition/0,,sid9_gci341232,00.html __________________ TODAY'S TECH NEWS: MIMAIL WORM SPREADING; LIKELY NOT AN RPC EXPLOIT Experts said the appearance of the mass-mailing Mimail worm Friday afternoon is likely not an exploit of the RPC vulnerability. http://searchsecurity.techtarget.com/originalContent/0,289142,sid14_gci917555,00.html LINUXWORLD: EVANGELIST ADVISES ON PREPARING LINUX PITCH In this interview, Novell Linux Business Office chairman Matt Asay explains how enterprise officers need to prepare before pitching Linux and open-source to decision makers. http://searchenterpriselinux.techtarget.com/originalContent/0,289142,sid39_gci917349,00.html PROXIM ENABLES 'LAST MILE' WAN CONNECTIVITY Proxim has introduced a new line of "last mile" wireless WAN products for service providers and enterprises that need building-to-building connectivity without fiber optic cabling. http://searchnetworking.techtarget.com/originalContent/0,289142,sid7_gci917546,00.html >> Catch up on all the latest IT news at http://searchtechtarget.techtarget.com/ ______________________ Information Kit | Linux, Unix, and all the little ixes Get up to speed quickly, and be the Linux/Unix Know-IT-All at your office. http://whatis.techtarget.com/definition/0,,sid9_gci915803,00.html ______________________ Secret Word-of-the-Day | What is it? HINT: This kind of attack involves sending more traffic to a network address than the programmers who planned its data buffers anticipated someone might send. >> Think you know the Secret Word of the Day? See if you're right! http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci213591,00.html _____________________ Quiz #5 | General IT terms Do you know how the Internet works? Take this week's quiz and find out! >> Click to take the quiz http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci553879,00.html ______________________________ RECENT ADDITIONS AND UPDATES [1] segment http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci916820,00.html [2] block http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci916318,00.html [3] bias http://whatis.techtarget.com/definition/0,,sid9_gci914376,00.html [4] cache cramming http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci914394,00.html [5] initial extent http://searchdatabase.techtarget.com/sDefinition/0,,sid13_gci916333,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ::::::::::::::::::::: ABOUT THIS NEWSLETTER :::::::::::::::::::::: This newsletter is published by TechTarget, the most targeted IT media. http://www.techtarget.com Copyright 2003 TechTarget. 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