Know the basics of open- and closed-circuit filtration designs. Factors to consider when specifying a return line filter system. Selecting the appropriate filtration system when designing a ...

A closed-circuit television camera looks after an art museum (January 1951 Radio-Electronics) It’s hard to imagine a world before the ubiquitous security camera. In major cities around the world ...

Qucs is a GPL circuit simulator. And if you want the GUI option, you might want to try out QucsStudio, which uses Qucs under the hood, and is free to use, but binary-only.

Open cooling towers expose process cooling water to the atmosphere, typically as part of a chiller system loop (see Figure 1). These open towers use an efficient, simple, and economical design. All ...

Closed circuit television may well be one answer to these problems. Television as an educational transmission system has many advantages.