This is a tree species distribution atlas. It contains information for 80 species in the eastern half of the United States (east of the 100th meridian). The site contains distribution maps and tables for different...

This webpage offers a doctoral dissertation in which the author proposes a theoretical framework to analyze and describe students' mathematical thinking in physics. The author addresses two particular questions. What are...

In August 2001 the Secretaries of Agriculture and the Interior joined the Western Governors' Association, National Association of State Foresters, National Association of Counties, and the Intertribal Timber Council to...

This paper focuses on how states can better align postsecondary education with their economic needs, which will position them to compete in the global economy by producing a highly-skilled workforce and by unleashing...

This is an animation of a comparator with noisy input voltage. The device compares the voltages and switches to the larger one. Voltages and parts of the circuit of this 3-D animated gif are highlighted with different...