Ventricular fibrillation kills thousands of Americans each week by inducing abnormal electrical signals that turn their hearts into quivering "bags of worms" no longer able to pump blood. Victims die within minutes, unless the erratic heart rhythms can be halted with massive jolts of electricity from a defibrillator. Medical researchers have moved one step closer to understanding the causes of ventricular fibrillation through a series of high-resolution movies that show how the condition disrupts the electrical signals that normally govern the heart. The high-speed imaging system produced for the research also revealed that ventricular fibrillation may develop in two distinct phases. The movies pinpointed a series of unusual spiral waves that originate with "rotors" near the surface of the heart. The waves rapidly expand, flow across the heart muscle, merge, and even interfere with each other, causing heart cells to contract in an uncoordinated way. The imaging system used by the research team produces detailed information from as many as 16,000 points on a portion of the exterior surface of the heart. Operating at 838 frames per sec, it allowed the team, consisting of researchers and physicists from the U.S. and Canada, to capture the rapid and disorganized waveforms for analysis. The system relies on fluorescent dyes that respond to electrical changes in the cells of the heart muscle. The researchers expose the beating heart to high-intensity lights, then image and intensify specific wavelengths of light returned by the dyes. Knowing how these unique waves form and behave could provide the information needed to design and test control techniques that may provide an alternative to existing defibrillators--which deliver the electrical equivalent of "a bowling ball dropped onto your chest from a two-story building," according to William L. Ditto, professor of physics at the Georgia Institute of Technology, one of the study's co-authors. E-mail email@example.com .
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.