How a liquid drop forms is a question important for ink jet printers, paint sprayers, and other machines that emit fluids from nozzles. "Ink jet printing uses tiny drops of ink that are shot out of a nozzle using piezo action," says Osman Basaran, a professor of chemical engineering at Purdue University. He and others at Purdue did the math behind drop formation. "Another application where drop formation is critical is in DNA arraying, where ink jets spray solutions containing DNA fragments onto biochip surfaces," says Basaran. The mathematical model he helped develop computes the quickly changing pressures and velocities of fluid in evolving drops. Engineers found that the formation of droplets changes when the fluid flow is increased and decreased. They say that the findings are important for controlling the quality of sprayed materials, such as the adhesive sprayed on tapes. They also point out that fluctuations in the performance of pumps and other equipment used for spraying sometimes increases or decreases the flow rate of a system without warning, so knowing how drops form is important to improving those processes that are vulnerable. Additional applications for Basaran's work include extraction processes used in chemical, petrochemical, pharmaceutical, and metallurgic industries. More information about Basaran's work is available at http:// ChE.www.ecn.purdue.edu/ChE/Fac_.Staff/obasaran/.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.