Before hybrids became the norm, these four cars showed just how quickly the technology was evolving.

In January, the Franklin County Board of Elections in Ohio received a surprising call. The man on the line said he was an agent at the Department of Homeland Security – and he needed immediate access ...

For the most part, I relished my eight years as staff writer for Columbia University’s Fu Foundation School of Engineering and Applied Science. I hadn’t taken a science, technology, engineering, and ...

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Biodiversity is changing across the planet, yet governments still lack the robust, consistent data needed to track these changes and guide effective conservation. Now, a new study led by the ...

Choose the VFD control mode based on the ratio of the system pressure to maximum internal pump pressure. For a centrifugal pump delivering to a system with high operating pressure and or high static ...

The state variable active filter (SVAF) is an active filter you don’t see mentioned much today; however, it’s been a valuable asset for us old analog types in the past. This became especially true ...

Abstract: The stabilization problem for discrete-time linear systems subject to both state and input delays is addressed when the state variables are not available. Full-order and reduced-order ...

Using variable speed drives on pumps reduces parasitic energy loss, enables proper maintenance and lowers capital costs. This article examines a method for determining the optimal number and speed of ...

United Nations Command, U.S. Forces Korea, and Combined Forces Command commander Gen. Xavier T. Brunson (2nd from left) talks to a Korean War veteran at a ceremony in South Korea to commemorate the ...

General Douglas MacArthur, commanding general for the unified U.N. forces Aiding the Republic of Korea to repel the North Korean Communists, and a staff officer (right) inspecting a North Korean tank ...