Monday, October 29, 2007
What's particularly tricky about badware is that you may not know that you downloaded it. Some badware manufacturers bundle it with other programs without disclosing that it's part of the package. Others put their programs on your PC when you visit certain websites or play online games.
Unfortunately, incessant pop-up ads aren't the only possible side-effect. Sometimes peoples' computers slow down or even crash. Sometimes peoples' personal information is abused, and there have been reported cases of identity theft. What's even more frustrating is that these programs are hidden in your computer, making it difficult to identify and remove them.
Why do badware providers make the effort? Because it is big business, amounting to a $2 billion-a-year industry. It's the Wild West of aggressive marketing and an industry supported by shadowy online marketers, small application vendors, and website operators.
The best and most important thing is for you to learn how to clean badware off your computer and to share your knowledge with those you know. An important factor when installing any software application is whether you have agreed to its installation and understand what it will do. Certain types of badware not only adversely affect your browsing experience, but how your computer itself functions. Some badware is known to interrupt your internet connection or even cause your computer to crash.
go to this site, to get more about badware - StopBadware.org
Friday, July 27, 2007
DjVu (pronounced déjà vu) is a computer file format designed primarily to store scanned images, especially those containing text and line drawings. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal images. This allows for high quality, readable images to be stored in a minimum of space, so that they can be made available on the web.
DjVu has been promoted as an alternative to PDF, actually outperforming PDF on most scanned documents. The DjVu developers report that color magazine pages compress to 40–70KB, black and white technical papers compress to 15–40KB, and ancient manuscripts compress to around 100KB; all of these are significantly better than the typical 500KB required for a satisfactory JPEG image. Like PDF, DjVu can contain an OCRed text layer, making it easy to perform cut and paste and text search operations.