Looking like a liquid opal, submicroscopic balls of plastic--the same polystyrene used to make coffee cups--sit embedded in a water-based gel. These polymerized crystalline colloidal array (PCCA) can do amazing and useful things. For instance, University of Pittsburgh chemists John H. Holtz and Sanford A. Asher discovered they can use the PCCAs as chemical sensors to make chemical measurements. "Colloidal arrays have fascinating optical properties," says Asher. "Because of their electrical charge, they self organize into a cubic structure where all the plastic balls are equally spaced. Depending on this spacing, the colloidal array diffracts (or reflects) visible light, much in the same way that an opal does, and you get intense colors." The chemists have made PCCAs that are highly sensitive to particular chemical species or thermal changes. If exposed to certain chemicals, such as lead, the array swells, changing the spacing. That causes the PCCA to diffract light at new wavelengths, and it changes color. Asher's group has demonstrated that the arrays are effective at detecting lead concentrations in water, and that once the lead is cleaned from the array it can be reused without any loss of sensitivity. FAX Kevin Roark at (412) 624-4895.
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.