Special Coverage

Home

Current Attractions

According to Edward Austin, Science and Mission Operation Project Manager for the Stratospheric Observatory for Infrared Astronomy (SOFIA), there are a lot of things that are obscured in the galaxy that we would want to see. We can use infrared technology, but a lot of the infrared spectrum is actually blocked by water vapor in the earth's atmosphere. One way to overcome this problem is to install a telescope in an aircraft capable of flying at 37,000 to 45,000 feet, placing it above roughly 99-percent of water vapor in the atmosphere.

Posted in: Blog

Read More >>

"Two-Faced" Particles



Posted in: Blog

Read More >>

Earthquake



Posted in: Blog

Read More >>

Circulation-Enhancing Device Improves CPR

Ever stand up too quickly from a sitting or lying position and feel dizzy or disoriented for a brief moment? The downward push of Earth’s gravity naturally causes blood to settle in the lower areas of the human body, and occasionally, with a quick movement—such as rising swiftly from a chair—the body is not able to adjust fast enough to deliver an adequate supply of blood to the upper parts of the body and the brain. This sudden, temporary drop in blood pressure is what causes brief feelings of lightheadedness upon standing. In essence, when the heart pumps blood to different parts of the body, it is working against the physical phenomenon of gravity in its efforts to send blood up to the brain.

Posted in:

Read More >>

Student LED Innovation



Posted in: Blog

Read More >>

Promoted-Combustion Chamber With Induction Heating Coil

Tests can be done at temperature and pressure combinations not previously attainable. An improved promoted-combustion system has been developed for studying the effects of elevated temperatures on the flammability of metals in pure oxygen. In prior promoted-combustion chambers, initial temperatures of metal specimens in experiments have been limited to the temperatures of gas supplies, usually near room temperature. Although limited elevated temperature promoted- combustion chambers have been developed using watercooled induction coils for preheating specimens, these designs have been limited to low-pressure operation due to the hollow induction coil. In contrast, the improved promoted-combustion chamber can sustain a pressure up to 10 kpsi (69 MPa) and, through utilization of a solid induction coil, is capable of preheating a metal specimen up to its melting point [potentially in excess of 2,000 °F (≈1,100 °C)]. Hence, the improved promoted-combustion chamber makes a greater range of physical conditions and material properties accessible for experimentation.

Posted in: Briefs

Read More >>

Rapid Development of Process Control Systems Using a Model-Based Approach

Developing an effective control system requires creation of an accurate, system-specific model. Developing a control system rapidly and cost effectively requires a disciplined approach that exposes design limitations early so they can be corrected before the costs and schedule go out of control. A trial-and-error development approach is utilized primarily when the control system is presumed to be simple or when there is insufficient time to conduct a full development cycle. This approach is characterized by a relatively small investment in up-front planning, followed by multiple iterations of build and test.

Posted in: Briefs

Read More >>