Scientists often make measurements. The physical quantities they measure fall into two categories: scalars and vectors. Scalar and vector quantities are treated differently in calculations. Motion - ...

The production and operation of offshore oil wells present typical characteristics of strong coupling, high nonlinearity, obvious time-varying behavior, and high operational risks. The occurrence of ...

With the advent of national health reform, millions more Americans are gaining access to a health care system that is struggling to provide high-quality care at reduced costs. The increasing adoption ...