A basic and affordable experimental apparatus is described that measures the static contact angle of a liquid drop in contact with a solid. The image of the drop is made with a simple digital camera by taking a picture that is magnified by an optical lens. The profile of the drop is then processed with ImageJ free software. The ImageJ contact…

Rupture resistance is a measure of the strength of a soil to withstand an applied stress or resist deformation. In soil survey, during routine soil descriptions, rupture resistance is described for each horizon or layer in the soil profile. The lower portion of the rupture resistance classes are assigned based on rupture between thumb and…

The basic philosophy underlying many contemporary developments in educational theory and practice is the concept of "equal opportunity" within an education system as distinct from the older concept of "equal education" for all. This research project investigated alternative educational environments that could be designed to…

The overview serves as an introduction to seven evaluation reports produced for the Occupational Exploration Program (OEP), a joint developmental effort of the Center for Vocational Education, Ohio State University, and the Jefferson County, Colorado public schools. The 1973-74 project was designed to provide occupational exploration experiences…