A new fluorescence cell has been developed for the laser induced fluorescence (LIF) detection of formaldehyde. The cell is used to sample a flow of air that contains trace concentrations of formaldehyde. The cell provides a hermetically sealed volume in which a flow of air containing...

The Direct Electric Power Converter (D-EPC), a semiconductor switching circuit, controls power distribution among multiple DC power sources without using a DC-DC converter. During every pulse-width-modulation (PWM) cycle, the DEPC alternately activates one of the multiple inverter circuits,...

“VIVA” piezo technology enables a valve to be direct-operated. The piezo element is protected from the fluid stream to eliminate potential for clogging or contamination failure. The valve is directly shifted by the VIVA arm, and requires only a standard 40-micron air filter...

Because manned spaceflight still imposes unknown stresses on the human body, NASA is seeking non-invasive technological approaches for intra-cranial pressure measurement. A baseline must be established on the ground, and then periodic measurements will be taken during flight — possibly over several...

Foam is a key indicator of efficacy and performance for a range of consumer pharmaceutical and food products. A company seeks cost-effective physical and mechanical technologies for enhanced foam generation and stability. Devices that are able to generate a high volume of foam from low-concentration, surfactant-based...

Chuck Jorgensen, Chief Scientist for the Neuro Engineering Lab at NASA Ames Research Center, in Moffett Field, CA, currently studies biolelectrical interfacing and the detection of human emotion and visualization. His research in subvocal speech was a...