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This brief interactive activity, by Electromechanical Digital Library and Wisconsin Technical College System faculty members Joseph Wetzel and Brian Gremore, provides a basic introduction to stateful packet inspectors (SPIs). This online lesson gives a definition, examples, and explanation of SPIs...

In this activity, developed by the Lane Community College MAPS GIS Program, students are "introduced to the concept of a watershed and begin to develop its biogeographic history from settlement to present day." Students then use maps they created to head into the field to check the validity of the...

Learn how to make waves of all different shapes by adding up sines or cosines. Make waves in space and time and measure their wavelengths and periods. See how changing the amplitudes of different harmonics changes the waves. Compare different mathematical expressions for your waves. This simulation...

The North Carolina Community College System BioNetwork's interactive eLearning tools (IETs) are reusable chunks of training that can be deployed in a variety of courses or training programs. IETs are designed to enhance, not replace hands-on training. Learners are able to enter a hands-on lab...

In the early 1990s, Stephen Fodor and his team developed a technique to produce miniature arrays of biological molecules. Their work led to the first DNA chip, and became the basis of techniques for large-scale genomic studies. The company Affymetrix was spun off in the early 1990s to focus on DNA...

This resource from Johns Hopkins University has audio and interactive components. Various forms of the Fourier series description for periodic signals are based on alternate ways of writing a cosine signal. This resource goes over Phasors, Phasor Sums, Harmonic Phasor Sums, Gibbs Effect, Windowing,...

The North Carolina Community College System BioNetwork's interactive eLearning tools (IETs) are reusable chunks of training that can be deployed in a variety of courses or training programs. IETs are designed to enhance, not replace hands-on training. Learners are able to enter a hands-on lab...

This web-based simulation was developed by the Environmental energy Technologies Division of the Lawrence Berkeley National Laboratory. The simulation allows the participant to select a home, of various dimensions, in any location in the United States. Variables that influence energy use, such as...

This interactive presentation, created by Terry Bartelt and hosted by the Electromechanical Digital Library, provides an explanation of how a metal detector functions. Most people take for granted this common piece of equipment, but the science behind its function is actually quite remarkable....

This brief interactive activity, by the Electromechanical Digital Library and Wisconsin Technical College System faculty, explains clearly the reasons to use switches in place of hubs when using an LAN. The animations and corresponding explanations are helpful as the user clicks through each slide...