Science/Technology

Sensawunda!

Submitted by Bill St. Clair on Sun, 2010-03-07 10:20.

George Potter has had his childish sense of wonder reprimed by Karl Schroeder's idea for a Verne gun. Cool, indeed. Just get the socialist wastes of air out of power and free men & women will do this and a whole lot more.

Quote:
Put 1.5 terawatts of clean solar power into orbit with less than ten launches. Obsolete coal and petroleum power production with green baseline power, using less than a 10th the number of solar cells as you’d have to install on Earth to capture the same amount of sunlight.

Orbit an entire space elevator with one launch. Set it up, retire the gun, and get on with a clean space age.

Do the same thing with an orbiting greenhouse infrastructure. Drop solar-powered mass drivers on the moon to feed a continual stream of building material to the building sites.

Orbit fuel depots to drop the price of conventional rocketry to orbit through the floor. One shot and access to space for NASA becomes 10 times cheaper.

Send up a telescope so big that it can image the continents of planets circling other stars.

( categories: Science/Technology )

The Great Cholesterol Myth

Submitted by Bill St. Clair on Fri, 2010-01-29 05:02.

Malcolm Kendrick at Spiked Online - the conventional wisdom about cholesterol, especially the relationship between diet and blood cholesterol, is wrong. Cholesterol in the diet does NOT cause cholesterol in the blood. Carobohydrates do. The truth is complicated. Statins DO reduce heart attacks, but they don't do it by reducing cholesterol. That's an unimportant side effect. [grabbe]

( categories: Science/Technology )

Uranium Is So Last Century — Enter Thorium, the New Green Nuke

Submitted by Bill St. Clair on Wed, 2009-12-30 18:38.

Richard Martin at Wired - apparently Thorium is a much better radioactive material for power generation than Uranium. Becomes harmless in 100 years, not 100,000. Plentiful. Cheap. Not subject to meltdown. The only difficulty is building containment materials that won't corrode over long exposure to the molten salt with which you control it.

Quote:
Even better, Weinberg realized that you could use thorium in an entirely new kind of reactor, one that would have zero risk of meltdown. The design is based on the lab’s finding that thorium dissolves in hot liquid fluoride salts. This fission soup is poured into tubes in the core of the reactor, where the nuclear chain reaction — the billiard balls colliding — happens. The system makes the reactor self-regulating: When the soup gets too hot it expands and flows out of the tubes — slowing fission and eliminating the possibility of another Chernobyl. Any actinide can work in this method, but thorium is particularly well suited because it is so efficient at the high temperatures at which fission occurs in the soup.

( categories: Science/Technology )

Bacteria Engineered to Turn Carbon Dioxide Into Liquid Fuel

Submitted by Bill St. Clair on Sun, 2009-12-13 08:20.

Science News - if too much CO2 is indeed a problem, which I doubt, here's a proper solution. No stealing of anybody's money. No government involved at all. Use the cyanobacterium Synechococcus elongatus to turn CO2 and sunlight into "the liquid fuel isobutanol, which holds great potential as a gasoline alternative."

( categories: Science/Technology )

A fresh way to take the salt out of seawater

Submitted by Bill St. Clair on Fri, 2009-11-06 10:39.

The Economist - neat new desalination technology uses much less energy than former methods. [grabbe]

( categories: Science/Technology )

GeoBulb Arrives

Submitted by Bill St. Clair on Wed, 2009-10-28 13:02.

I received today from C. Crane my first GeoBulb. It's a GeoBulb II in cool white. Standard Edison socket, 60 watt equivalent light, draws 7.5 watts, 30,000 hour life, $50 plus shipping. The bulb is quite heavy, relative to the incandescent bulb it replaced. It's cool to the touch when illuminated. Nice white light. It buzzes softly, but I only hear it if I put my ear within a few inches. Won't be able to fully judge it until the sun goes down, and when I discover if it really does last for three years, but so far I'm happy with it.

GeoBulb Box
GeoBulb Box

GeoBulb made in China
Made in China

GeoBulb protection
Well-packaged

GeoBulb and Full Spectrum Bulb
With my old full spectrum incandescent bulb

GeoBulb Illuminated
In my 35-year-old desk lamp

( categories: Science/Technology )

The false god of coffee

Submitted by Bill St. Clair on Sat, 2009-10-24 09:02.

Robin Barooah at The Quantified Self - Mr. Barooah has, as I have, gone through cold turkey on coffee a number of times, but each time he started again, because he thought coffee would help him concentrate better. He started his most recent withdrawal at the beginning of August, deciding to withdraw slowly, 20ml per week, to allow the psychological withdrawal to track the physical withdrawal. He also tracked his ability to concentrate, from June into October, so that when he started to think that starting coffee again might improve his concentration, he had objective proof that it wasn't so.

Interesting. I've now been off the brown stuff for 3 weeks. Laid in bed the first week, was slightly-less-than-usually productive the second week. Could hardly work at all this past week, though I was vertical for most of each day. Hope it gets better soon.

( categories: Science/Technology )

Best. Razor. Ever!!

Submitted by Bill St. Clair on Sun, 2009-10-18 09:18.

Disposable safety razors were a pretty new idea, when I started shaving, in 1972 or thereabouts. I've been through their evolution, from one to two to three, and now, to four blades. I've tried Gillette and Bic, but have always preferred Schick razors. They pull less on my whiskers and stay sharp longer. I ran out of my latest disposable Schick blades, so I looked for some new ones yesterday. They didn't have any, but they did have the Schick Quattro Titanium, a couple of choices, one with batteries, which I didn't get, and the one pictured below, which I did. It has four blades on the main shaving side, plus a single edging blade, which I doubt I'll ever use, on the other side. It's metal, not plastic; there's a nice heft to it. The razor, with two blades, cost $9. It came with a coupon, worth $5 off a purchase of two packages of blades, so I got those, too. Total price: $25 for a razor and 10 blades, which will likely last me a year or more.

I tried it for the first time this morning. Smoothest shave ever. Not a hint of pull. And it trimmed my whiskers well. Big win!

[note to FTC and other worthless eaters: I received no compensation for this review, now go jump off a bridge]

Schick Quattro Razor

( categories: Science/Technology )

What happened to global warming?

Submitted by Bill St. Clair on Thu, 2009-10-15 07:29.

Paul Hudson at BBC - as it turns out, the Earth is no longer getting warmer. The warmest year on record was 1998. [lew]

Quote:
One thing is for sure. It seems the debate about what is causing global warming is far from over. Indeed some would say it is hotting up.

( categories: Politics | Science/Technology )

Augmented Reality in a Contact Lens

Submitted by Bill St. Clair on Tue, 2009-10-06 06:10.

Babak A. Parviz at IEEE Spectrum - a University of Washington researcher describes contact lenses he's working on, which superimpose an electronic image on the natural world image. The Cyborg is born! Well, not quite yet. They've done trials on live rabbits, but aren't yet ready for human subjects. And at present, the electronic image is only 8x8 pixels in size. The world's smallest banner ad.

Cyborg Contact Lens

Quote:
Babak A. Parviz wakes up every morning and sticks a small piece of polymer in each eye. So it was only a matter of time before this bionanotechnology expert at the University of Washington, in Seattle, imagined contact lenses with built-in circuits and LEDs. “It’s really fun to hook things up and see how they might work,” he says.

( categories: Science/Technology )

What's Inside a Cup of Coffee?

Submitted by Bill St. Clair on Mon, 2009-10-05 12:42.

Patrick Di Justo at Wired - some of the contents of your cup of joe: Caffeine, Water, 2-Ethylphenol, Quinic acid, 3,5 Dicaffeoylquinic acid, Dimethyl disulfide, Acetylmethylcarbinol, Putrescine, Trigonelline, & Niacin. Who'd-a known?

( categories: Science/Technology )

Sirona CEREC 3D: CNC Milling Machines, for Dentists

Submitted by Bill St. Clair on Wed, 2009-07-08 05:13.

Cerec Online makes the MC XL and MC L CNC milling machines for dentists. These allow a dentist to mill a crown himself, in his office, while the patient waits.

Quote:

  • Superior results: Precision in the range of +/- 25 microns
  • Production: Six minutes milling time for a full--contour crown; three to four minutes for partial coverage
  • Better fit and smoother restoration surface: 7.5u milling resolution
  • Intuitive: Automatic software downloads and user-friendly display guides
  • Compatibility: LAN, WLAN and network compatible
  • Longer life: Milling chamber design and easy block clamping (no tools required)
  • Platform for future in-office CAD/CAM development

It appears from the "Return on Investment Calculator" on this page at Patterson Dental, these machines cost $2,000 or $2,700 per month, depending on which configuration you pick.

( categories: Science/Technology )

Open Source Hydrogen Car Has a Porsche Pedigree

Submitted by Bill St. Clair on Wed, 2009-06-17 06:24.

Keith Barry at Wired - The Riversimple Urban Car is a 700-pound, two-person, fuel-cell electric automobile. Its makers plan to lease it for 200 pounds ($330) a month, including hydrogen. It has a 50 mph top speed and a 200 mile range. It gets the equivalent of 300 miles per gallon. Cool. Hope they're successful.

Riversimple Urban Car

( categories: Science/Technology )

Vibram Five Fingers Shoes

Submitted by Bill St. Clair on Wed, 2009-06-10 06:58.

Tim Ferriss at Four Hour Work Week - a review of Vibram Five Fingers Shoes. Go barefoot with protection. Neat idea. I may spend the $75 it costs to try out (for the Classic model. The other three retail for $80-$90). That second link has a store finder and on-line buying, and Amazon has some sizes and models for slightly cheaper. [grabbe]

Vibram Five Fingers Shoes

( categories: Science/Technology )

Homegrown Grains: The Key to Food Security

Submitted by Bill St. Clair on Fri, 2009-05-29 05:59.

Gene Logsdon of Chelsea Green Publishing via AlterNet - why you should grow your own grains, and how much space you need to do it.

Quote:
My friend didn’t believe me until I showed him, step by step. We cut off a couple of armloads of wheat stalks, flailed the grain from the heads onto a piece of clean cloth (with a plastic toy ball bat), winnowed the chaff from the grain, ground the grain to flour in the blender, made batter, and fried pancakes. Topped them with real maple syrup. Sweet ecstasy. My friend forgot all about his tomatoes. The next year, he invited me over for grain sorghum cookies, proudly informing me that grain sorghum flour made pastries equal to, if not better than, whole wheat flour. Moreover, grain sorghum was easier to thresh. I had not only made another convert to growing grains in the garden, but one who had quickly taught me something.

( categories: Science/Technology )

Air Conditioner Vibration Mitigation

Submitted by Bill St. Clair on Fri, 2009-05-22 07:47.

I turned on our new window air conditioner yesterday and was soon assaulted by a loud vibration from the window above it. Pressing on the center of the window made the noise stop, so I taped a rock there. Not quite as good as my finger, but a definite improvement.

Air Conditioner Vibration Mitigation via Rock

( categories: Science/Technology )

BigDog Robot

Submitted by Bill St. Clair on Sun, 2009-02-15 08:58.

Boston Dynamics has built BigDog, "The Most Advanced Quadruped Robot on Earth". Amazing. Frightening, too, when you imagine what the War Department is likely to do with it. Video at the link, and here on YouTube, embedded below. [grabbe]

( categories: Science/Technology )

35 Inconvenient Truths

Submitted by Bill St. Clair on Thu, 2009-02-05 11:51.

Christopher Monckton at The Science and Public Policy Institute - Mr. Monckton describes 35 major scientific errors in Al Gore's movie.

Quote:
Ms. Kreider says the IPCC’s results are sometimes “conservative,” and continues: “Vice President Gore tried to convey in good faith those threats that he views as the most serious.” Readers of the long list of errors described in this memorandum will decide for themselves whether Mr. Gore was acting in good faith. However, in this connection it is significant that each of the 35 errors listed below misstates the conclusions of the scientific literature or states that there is a threat where there is none or exaggerates the threat where there may be one. All of the errors point in one direction – towards undue alarmism. Not one of the errors falls in the direction of underestimating the degree of concern in the scientific community. The likelihood that all 35 of the errors listed below could have fallen in one direction purely by inadvertence is less than 1 in 34 billion.

We now itemize 35 of the scientific errors and exaggerations in Al Gore’s movie. The first nine were listed by the judge in the High Court in London in October 2007 as being “errors.” The remaining 26 errors are just as inaccurate or exaggerated as the nine spelt out by the judge, who made it plain during the proceedings that the Court had not had time to consider more than these few errors. The judge found these errors serious enough to require the UK Government to pay substantial costs to the plaintiff.

( categories: Politics | Science/Technology )

A magnificent bit of piloting

Submitted by Bill St. Clair on Fri, 2009-01-16 07:56.

Dale Amon at Samizdata - yesterday's unplanned water landing of US Airways Flight 1549 was not a tragedy due to one man, the pilot who put it down intact on the Hudson, and ensured that all the passengers got out, Captain C.B. "Sully" Sullenberger. Thank you, Sully.

CNN has lots of video here.

( categories: Science/Technology )

Powermat

Submitted by Bill St. Clair on Sat, 2009-01-10 06:44.

Powermat is a new recharging technology that uses magnetic induction instead of wires to charge electronic devices. They claim 90% efficiency and equal time to charge. Very cool. There are video demos at their site and at Wired's CES Gadget Roundup. Slated to ship this fall. $100 for the charging mat. $30 for a device receiver. Their site also mentions wireless syncing as a future feature. Cool. [wired]

Powermat

( categories: Science/Technology )
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