The notion of social structure may mask systematic biases

Some argue that men and women who have otherwise equal qualifications receive different treatment in the workplace because of their gender. Others note that individuals are sometimes viewed as having different essential qualities based on their race and ethnicity, regardless of their individual qualities. When examined, these social distinctions are often considered stereotypes based on prejudice. However, these social distinctions often go unexamined because they appear to be the result of social structures rather than prejudice.

http://english.turkcebilgi.com/Social+system

Solar Air Heating Systems

MatrixAir™ Transpired Solar Air Collector

Designed for new construction or retrofits this patent-pending, unglazed transpired solar air heating collector resembles conventional exterior metal siding. Recommended for solar air heatingsystems with total fresh air flow needs of at least 3000 CFM, MatrixAir™ TR (Transpired) Solar Air Heatingcollectors come in a wide variety of cladding styles and colours and are practically unlimited their size or output. MatrixAir™ “TR” series transpired solar air collectorsrequire the use of an air outlet below the mid point of the collector.

MatrixAir™ Backpass Solar Air Collector

Ideally suited for new construction with collector heights ranging from 12 – 24 ft, this backpass solar air collector performs to within 99% of the performance of our transpired solar air heating collector thanks to our unique, modular, patent-pending design. The MatrixAir™ BP (Backpass)Solar Air Heating is characterized by its horizontal plenum located along the top of the collector or roof mounted behind the vertical cladding to facilitate integration with ceiling or roof mounted HVAC and a wide range of CFM requirements. Note: Backpass (BP) solar air heating systems are well suited to upper wall-mounted fresh air inlets prescribed by ASHRAE 62.1

MatrixAir™ Delta Roof Mounted Modular Solar Air Collector

Ourroof mounted modular solar air heating collector is the ideal solution for those circumstances where no wall area is suitable for a façade mounted collector due to obstructions, glazing, bylaws or wall orientation. Incorporating a flat, transpired absorber and built-in air plenum this solar air heating modular system optimizes the solar heated air flow through each solar collector for maximum output. The individual MatrixAir™ Delta Solar Air Heating250 CFM modules may be connected in a combination of series and parallel configurations to address a wide variety of roof layouts or CFM requirements.

http://www.matrixenergy.ca/solar-air-heating/products.html