Mathematical modelling of a heat exchanger in a carbon dioxide heat pump, an evaporator, is considered. A reduced model, called the the zero Mach-number limit, is derived from the Euler equations of compressible liquid flow through elimination of time scales associated with sound waves. The...

Research on segregation of immigrant groups is increasingly turning its attention from residential areas toward other important places, such as the workplace, where immigrants can meet and interact with members of the native population. This article examines workplace segregation of immigrants....

1. Introduction to e-commerce in the airline industry -- 2. Airline digital properties and features -- 3. Airline e-marketing -- 4. Airline e-sales and distribution -- 5. Airline web customer service -- 6. The airline e-commerce organization -- 7. Airline e-commerce strategy.