Category Archives: Engineering

Engineering TV

Engineering TV offers some nice videos. The site needs more content and some better usability (almost no webcasts are returned on clicking the tags – though they can be found by searching, videos play with sound automatically (without user approval), the ad sounds are way too loud…) but it is another site that might provide some interesting webcasts. I am still most hopeful about SciVee (based on the tie to PLoS) – though the progress has been slow so far.

Compressed Air Powered Car Webcast

I posted on a car powered using compressed air previously. Here is a webcast on that car:

More webcasts on the car: Catvolution’s Air Car ride + interview Cyril Negre – CATvolution YouTube webcasts

Invisibility Cloak Closer

Invisibility shields one step closer with new metamaterials that bend light backwards

Applications for a metamaterial entail altering how light normally behaves. In the case of invisibility cloaks or shields, the material would need to curve light waves completely around the object like a river flowing around a rock. For optical microscopes to discern individual, living viruses or DNA molecules, the resolution of the microscope must be smaller than the wavelength of light.

The common thread in such metamaterials is negative refraction. In contrast, all materials found in nature have a positive refractive index, a measure of how much electromagnetic waves are bent when moving from one medium to another.

In a classic illustration of how refraction works, the submerged part of a pole inserted into water will appear as if it is bent up towards the water’s surface. If water exhibited negative refraction, the submerged portion of the pole would instead appear to jut out from the water’s surface.
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For a metamaterial to achieve negative refraction, its structural array must be smaller than the electromagnetic wavelength being used. Not surprisingly, there has been more success in manipulating wavelengths in the longer microwave band, which can measure 1 millimeter up to 30 centimeters long.

Compressor-free Refrigerator

Compressor-free refrigerator may loom in the future

Refrigerators and other cooling devices may one day lose their compressors and coils of piping and become solid state, according to Penn State researchers who are investigating electrically induced heat effects of some ferroelectric polymers.

“This is the first step in the development of an electric field refrigeration unit,” says Qiming Zhang, distinguished professor of electrical engineering. “For the future, we can envision a flat panel refrigerator. No more coils, no more compressors, just solid polymer with appropriate heat exchangers.”
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Zhang’s approach uses the change form disorganized to organized that occurs in some polarpolymers when placed in an electric field. The natural state of these materials is disorganized with the various molecules randomly positioned. When electricity is applied, the molecules become highly ordered and the material gives off heat and becomes colder. When the electricity is turned off, the material reverts to its disordered state and absorbs heat.

An Illustrated Guide to Every Stupid Cable You Need

There are at least four different kinds of USB plugs, two kinds of FireWire and like a million different ways to connect something to TV or monitor. Modern gadget life can be kind of retarded in this way. Why not one kind of cable, or just a couple? I don’t know. But until everyone gets on the same appendage-to-hole scheme, in the meantime, you can use this: an illustrated guide to pretty much every kind of cable you will see in current gadgets and what it’s used for
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USB Type A Universal Serial Bus, the gold standard. The whole idea behind it is that this one interface will connect everything (except the stuff it doesn’t), killing off the old guard, like parallel and serial ports. It moves data, and in the case of USB 2.0—which is pretty much the standard now—it does it faster, and with some extra specs for power.
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USB Type B The USB Type B plug is basically a USB connector for peripherals—you’ve probably seen it jacked into a printer or scanner.

Loan Forgiveness Program for Engineering Students

Update (2011): sadly politicians decided though they can give billions in welfare to investment banks and billions in tax breaks to those giving politicians lots of cash they didn’t want to help out engineering students. I actually wouldn’t have a big problem with this decision (to not fund this program) if it was symptomatic of frugal actions by those we entrust with leading our government. Given how frivolously they reward those that give them lots of cash for their campaigns (or pay as soon as they and their staff take jobs with organizations they gave huge benefits to) I think not funding this very small cost is foolish. This is the type of program I think smart countries will adopt (the types of policies the SUA adopted in the 1960’s and lately countries like Singapore, Korea, China have been adopting to encourage science and engineering leadership for the next generation).

Engineering students would receive up to $10,000 in student loan forgiveness under legislation just passed by Congress that the president is expected to sign. The Higher Education Reauthorization and College Opportunity Act of 2008 creates a new program to provide financial incentives for professions in areas of national need including engineering.

Engineering students would qualify for up to $10,000 in credit against their outstanding student loan obligation following graduation and entry into the engineering, technology, applied sciences, or mathematics (and other areas too) workforce. The program authorizes up to $2,000 per year of schooling.

The legislation also includes the Robert C. Byrd American Competitiveness program (an adjustment to the existing program):

a Mathematics and Science Honors Scholarship program for students who are earning baccalaureate or advanced degrees in science, mathematics, or engineering and who agree to serve for five consecutive years in a field relevant to such degree; (2) a Mathematics and Science Incentive program under which the Secretary assumes the obligation to pay the interest due on FFELs and DLs by individuals who agree to serve for five consecutive years as highly qualified teachers of science, technology, engineering or mathematics within high need LEAs, or as mathematics, science, or engineering professionals

More Friday Cat Fun

Engineer’s Guide to Cats, via: Engineering And… [broken link removed]. Cats can also guard you from bears 🙂

University of Michigan Wins Solar Car Challenge Again

U-M wins North American Solar Challenge for the fifth time

The University of Michigan’s Solar Car Team won the North American Solar Challenge, crossing the finish line in Alberta, Canada on Tuesday after more than 50 hours of racing over nine days.
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The car averaged around 45 mph and led from the first day, besting 15 university teams that raced the 2,400-mile course from Plano, Texas to Calgary. Continuum finished about 10 hours before the second place team.
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The North American Solar Challenge normally takes place every other year in the same year as the world race, but in 2007 its previous sponsor backed out. The race’s future was in question until Toyota took over the sponsorship.

Home Engineering: Dialysis machine

‘DIY’ kidney machine saves girl

A baby dying from kidney failure was saved when her doctor designed and built her a dialysis machine from scratch in his garage.
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The job of the kidneys is to ‘clean’ the blood, and if they fail, a dialysis machine can do this job instead.
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However, Dr Coulthard, together with senior children’s kidney nurse Jean Crosier, devised a smaller version, then built it away from the hospital. Millie was connected to the machine over a seven day period, allowing her own kidneys to recover.

Rebecca, from Middlesbrough, said: “It was a green metal box with a few paint marks on it with quite a few wires coming out of it into my daughter – it didn’t look like a normal NHS one.
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The machine is still in use, helping babies in similar circumstances to Millie, but Dr Coulthard told the Newcastle Journal newspaper that an official version was needed. “This machine is only being used on the tiniest, earliest babies where there is nothing else that can be done.

“But if we had a machine that we could use much more freely, then we would be able to deal with many more babies and have a much greater chance of saving lives.”

Tinker School: Engineering Camp

photo of Drilling at the Tinker School

NPR had a nice story on kids taking risks (a compliment our post from a couple days ago: Kids Need Adventurous Play) Camp Offers Kids A Chance To Play With Fire. Tinkering School gives kids a chance to make real things they use (boats, motorized bikes, bristle bots…). Their blog is awesome.

The Tinkering School offers an exploratory curriculum designed to help kids – ages 7 to 17 – learn how to build things. By providing a collaborative environment in which to explore basic and advanced building techniques and principles, we strive to create a school where we all learn by fooling around. All activities are hands-on, supervised, and at least partly improvisational.
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Parents/guardians will be expected to complete the big scary liability waiver.
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Tinkering School is taught primarily by me, Gever Tulley, aided of course by my indispensable wife Julie Spiegler and the inimitable Robyn Orr. By day, I am a Senior Computer Scientist at Adobe, writer, and practicing sculptor…

I started the Tinkering School because it’s the kind of thing I would like to have been able to go to myself.

I wish I could go. Related: National Underwater Robotics Challenge – Science Toys You Can Make With Your Kids – La Vida Robot – Technology and Fun in the Classroom