The engineering of human reproduction is one of the defining scientific advances of the past century. Methods to specifically engineer the testis have an equally long and rich history, and have experienced significant progress over the past two decades, leading to current-day breakthroughs which are shifting the paradigms by which...
Beginning in the 1960s, U.S. federal law required ongoing and systematic planning as a condition of federal transportation funding. An ad-hoc system for forecasting future travel, which has come to be referred to as the "four-step" procedure, quickly became established as the ubiquitous analytic tool for transportation planning. The four-step...