The idea that technology is moving beyond the personal computer to everyday devices with embedded technology and connectivity as computing devices become progressively smaller and more powerful. Also called ubiquitous computing, pervasive computing is the result of computer technology advancing at exponential speeds — a trend toward all man-made and some natural products having hardware and software. Pervasive computing goes beyond the realm of personal computers: it is the idea that almost any device, from clothing to tools to appliances to cars to homes to the human body to your coffee mug, can be imbedded with chips to connect the device to an infinite network of other devices. The goal of pervasive computing, which combines current network technologies with wireless computing, voice recognition, Internet capability and artificial intelligence, is to create an environment where the connectivity of devices is embedded in such a way that the connectivity is unobtrusive and always available.
It wasn’t that long ago that data storage devices were measured in gigabytes and terabyte hard drives seemed exotic. Now that terabytes are commonplace, the next unit of data measurement you’re likely to hear about is the petabyte. In data storage, terms have been defined out to the yottabyte (1024 bytes), or the yobybyte (280 […]
A petaflop is the ability of a computer to do one quadrillion floating point operations per second (FLOPS). Additionally, a petaflop can be measured as one thousand teraflops. A petaflop computer requires a massive number of computers working in parallel on the same problem. Applications might include real-time nuclear magnetic resonance imaging during surgery or […]
Similar in nature to e-mail phishing, pharming seeks to obtain personal or private (usually financial related) information through domain spoofing. Rather than being spammed with malicious and mischievous e-mail requests for you to visit spoof Web sites which appear legitimate, pharming ‘poisons’ a DNS server by infusing false information into the DNS server, resulting in […]
- phase change disk
A type of rewritable optical disk that employs the phase change recording method. Using this technique, the disk drive writes data with a laser that changes spots on the disk between amorphous and crystalline states. An optical head reads data by detecting the difference in reflected light from amorphous and crystalline spots. A medium-intensity pulse […]
- phase change memory
Abbreviated as PCM, phase change memory is a type of non-volatile memory that is much faster than the common flash memory, from 500 to 1,000 times faster, and it also uses up to one half the power. Phase change memory uses a semiconductor alloy that can be changed rapidly between an ordered, crystalline phase having […]