These patients were compared with a second group of 20 who stayed the standard time on standard filters.

Grease on range hood and filters, exhaust system built improperly.

"Why would they spend all this money on filters and uniforms if they weren't paying attention to all parts of the system?"

Sampling machines take in the particles on filters, which are weighted to determine if the standard is violated.

These are thoroughly described in the article on mechanical filters.

Digital room correction in some sound reproduction systems rely on acausal filters.

His organization opposed the law and is a sponsor of a Web site, getnetwise.com, which provides families with advice on filters and other technologies.

See the article on linear filters for details on their design and analysis.

Corporations whose employees use e-mail regularly are having to spend more money on filters to handle the large volumes of traffic.

The research also shows that continuing to investigate attacks on statistical filters is worthwhile.