Author Archives: curiouscat

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

The Most Trusted Sources in Science

PBS: The Most Trusted Source in Science?

When Americans were asked in 2005 about their views on the credibility of information sources about biotechnology, a clear hierarchy of trust emerged starting at the top with scientific journals (almost 60% of respondents said they trusted journals as credible information ), followed by university scientists who are funded by government (50%), public television (50%), government scientists (40%), the WHO (40%), university scientists funded by industry (35%), biotechnology company scientists (30%), religious leaders (20%), TV networks (18%), biotechnology executives (15%), print media (15%), and political leaders (10%)

The data is from a survey by NSF in 2005. I predict PBS’ influence will grow as they provide valuable, open access, content online (the way the public will get most of their news).

Lighting in Slow Motion

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The videos provides a super slow motion lighting strike. A separate lighting related item, from NASA: Gigantic Jets:

They are extremely rare but tremendously powerful. Gigantic jets are a newly discovered type of lightning discharge between some thunderstorms and the Earth’s ionosphere high above them. Pictured above is one such jet caught by accident by a meteor camera in Oklahoma, USA. The gigantic jet, at the lower left, traversed perhaps 70 kilometers in just under one second.

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.

Science Museums Should Grow Minds Not Revenue

The dumbing down of science by Karen Heller

Our largest science institution simply became the Franklin, as if it were some glistening condo development or waterfront casino. Which is fitting, given all the sizzle, pyrotechnics and cost. Adult admission has soared to $23.25 if you want to see the current exhibits “Real Pirates” and “Chronicles of Narnia,” the latter – correct me if I’m wrong – based on a fictional world and $1 billion global movie franchise.

“Adults” happens to mean anyone over 11, a rather severe view for an organization geared toward students. Imax? That’s $5.50 extra. Audio tour? Yo ho ho, and an additional $6. For that kind of money, I left my two adults, 12 and 14, at home. New York’s American Museum of Natural History, a superior museum, offers $17 student tickets for ages 13 through 17
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The rub was that neither group appeared well-served by science. “Sports Challenge” is more Dave and Buster’s than lessons in physiology, a homage to hyperactivity where kids run around without ever stopping to learn.

“Sir Isaac’s Loft” contains one of those George Rhoads kinetic sculptures found in airports. “Sometimes you just can’t avoid science,” the caption reads, almost as an apology. “My intention is not to exemplify scientific principles,” Rhoads states on the plaque. Oh, great.

Frequently, the Franklin seems as scared of learning as it does of science. Lopping off the “Institute” is an indication. What I watched was kids dashing madly, going from one pit stop to the other, without absorbing much. There was so much insistent fun (!) and no, this-isn’t-really-science stuff that the place is transformed into just another consumer palace.

I think she makes very good points. I fear many museums are more focused on growing revenues than growing minds. That is a very sad state of affairs. I have nothing wrong with focusing on making money – just with museums (and even moreso science museums) doing so. Museums should focus on building minds (which does require balancing finances to stay in business, I understand). If you want to be a Dave and Busters like organization, go ahead, just leave our science museums to those that want to build minds.

Photos of Parfrey’s Glen, Wisconsin

photo of Yellow Flower in Parfreys Glen

See more photos from my visit to Parfrey’s Glen Natural Area in Wisconsin, about an hour outside of Madison. It really was amazingly beautiful – the pictures do not do it justice. The Parfrey’s Glen trail is under a mile but well worth visiting. If you want to hike more try the Ice Age National Scenic Trail or nearby Devil’s Lake State Park. The top photo is of me (John Hunter) at nearby Durwood’s Glen. The yellow flower is from Parfrey’s Glen.

Photo of yellow flower by John Hunter is available for use: Creative Commons Attribution-Share Alike (see requirements for use).

Parfrey’s Glen is Wisconsin’s first State Natural Area, is a spectacular gorge deeply incised into the sandstone conglomerate of the south flank of the Baraboo Hills. The exposed Cambrian strata provide excellent opportunities for geological interpretation. The walls of the glen – a Scottish word for a narrow, rocky ravine – are sandstone with embedded pebbles and boulders of quartzite.

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 🙂