Air filters perform an important function in commercial and institutional facilities. Because indoor air typically is two to five times more polluted than outdoor air, air filters are needed to remove respirable particles such as microorganisms, dust and allergens from the breathing air. In fact, air filters provide the primary defense for…

Colleges and universities need to support their basic science research and education missions while simultaneously upgrading or replacing aging infrastructure, and finding ways to attract top faculty and students. To satisfy all these demands, higher-education institutions are constructing state-of-the art science facilities that are expected to…

For many years, the only way to have a playing field was to grow it out of the ground. However, natural turf is difficult and expensive to maintain. The 1960s saw the advent of synthetic turf. The material made it easier to stage football and baseball games at indoor venues. The most prominent example was the Astrodome in Houston, which gave the…

The basic dilemma in creating performance spaces in secondary schools is that such spaces often must serve multiple functions. Ideally, there should be three different spaces: one to present dramas; another for musical performances; and a third for assemblies--lectures, movies, political and community events. Often, the unsatisfactory solution to…