An Engineering Analysis of the Stoichiometry of Autotrophic, Heterotrophic Bacterial Control of Ammonia-Nitrogen in Zero-Exchange Marine Shrimp Production Systems

Abstract

Carpooling is the commuting mode of 18 to 20% of American workers; but relatively little definitive information has been available on who carpools; how and why. Based on data from the 1977–1978 Nationwide Personal Transportation Survey; this paper analyzes the characteristics of carpoolers; distinguishes among different types of carpoolers; identifies the key differences between carpoolers and drive alone and transit commuters; describes how commuters carpool; and offers explanations of why commuters carpool. The paper also addresses the issue of the feasibility of a substantial increase in carpool mode share.