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## Comment: Re:Shattered (Score 1)184

by riptide_dot (#43940849) Attached to: Ask Slashdot: What Will IT Departments Look Like In 5 Years?
I don’t shop online, because I don’t own a computer. My belief is they haven’t completed inventing computers yet. Why? Because they don’t work. If they worked, not every business in the world would have a department to fix them. They don’t have a department to fix pencils. - Fran Lebowitz

## Comment: Don't feed your child bananas! (Score 5, Interesting)371

by riptide_dot (#37800522) Attached to: Ask Slashdot: Radiation Detection For Tokyo Resident?
From http://health.phys.iit.edu/extended_archive/9503/msg00074.html:

re: The Radiation Dose from a "Reference Banana."

Some time ago (when I almost had time to do such things) I calculated the dose one receives from the average banana. Here's how it goes:

On page 620 of the CRD Handbook on Rad Measurement and Protection, the concentration of K-40 in a "Reference Banana" is listed as 3520 picocuries per kilogram of banana. For those of us who are stuck in certain unit ruts, this is equivalent to 3.52E-6 microcuries of K-40 per gram of banana.

An average "Reference" banana weighs (masses) about 150 grams (I think.) So, the ICRP Reference Banana contains about 5.28E-4 microcuries of probably deadly K-40.

Federal Guidance Report #11 lists the ingestion dose (committed effective dose equivalent) for K-40 as 5.02E-9 Sv/Bq or (again, for those of us who are "unit-challenged," 1.86E-2 rem per microcurie ingested.)

Thus, the CEDE from ingestion of a Reference Banana is 5.28E-4 x 1.86E-2 = 9.82E-6 rem or about 0.01 millirem.

I have found this "Banana Equivalent Dose" very useful in attempting to explain infinitesmal doses (and corresponding infinitesmal risks) to members of the public. (Interestingly, the anti-nukes just HATE this, and severely critisize us for using such a deceptive concept.)

Would love to go into more detail, but have to get back to our DEADLY Human Radiation Experiments (i.e., eating bananas.)

The same table in the CRC Handbook lists 3400 pCi/kg for white potatoes and 4450 pCi/kg for sweet potatoes - so you could carry through the same sort of calculation for Reference Potatoes. Interestingly, raw lima beans come in at 4640 pCi/kg, "dry, sweet" coconut comes in at 6400 pCi/kg, and raw spinach (yum!) comes in at 6500 pCi/kg.

Considering the fact that the DOE has officially stated that "there is no safe dose of radiation" my advice to you all is to stop eating immediately.

Oh yes! Almost forgot. Regarding K-40, go into your local grocery store, buy some salt-substitute (there are two common brands, and the one in the white and orange labeled container works best) spread some out on a table and check it out with a GM survey instrument. There it is folks, deadly radioactivity in your grocery store!

Yours for healthful diets . . .
Captain Internal Dosimetry
aka Gary Mansfield, LLNL, (mansfield2@llnl.gov)

Disclaimer:

Neither Lawrence Livermore National Laboratory, the University of California, nor the Department of Energy recommends eating bananas.

-------
The point of course, is to make people realize that the notion that "there is no safe dose of radiation" isn't necessarily correct. Your granite countertops have trace particles of uranium in them. The Capital Building in Washington DC has so much granite in it that it wouldn't be qualified as a nuclear facility because it already emits too much radiation. We consume radiation all of the time from a variety of sources and our bodies rid themselves of it naturally.

## + - SPAM: The art of public speaking from one of its masters

Submitted by mikeconsol
mikeconsol (1671406) writes "The careers of most executives advance or stall based on how well they communicate. Public speaking performances are the riskiest of all, but they also give you a chance to make a very big impact. Being a sought-after public speaker gives you and your company a cachet that would otherwise be absent. One of the best places to look for guidance in these matters is the late Jack Valenti, former CEO of the Motion Picture Society of America. Here is expert advice from Valenti on becoming a confident and powerful public speaker."
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## + - Bomb-Resistant Trucks Blast RPGs Before They Hit

Submitted by
Ponca City, We love you writes "Wired reports that the US Army has awarded an \$8 million contract to equip MRAP (mine resistant ambush protected) armored trucks with Iron Curtain, a protection system which blasts incoming Rocket Propelled Grenades (RPG) before they can hit the vehicle. Iron Curtain detects and tracks the incoming rocket with radar, which then cues an optical sensor — a smart camera, essentially that identifies and classifies the threat, pinpointing the location of the rocket with an accuracy of about half an inch, and then selects an aim point. A row of explosive countermeasures is mounted on a rail running around the top of the vehicle. The system selects the best one of countermeasures, and fires it vertically downwards at the exact moment the rocket is passing. This does not destroy the warhead but ‘duds’ it so that the warhead deflagrates, rather than exploding properly. By the end of the collision of RPG and countermeasure, the warhead bounces off of the vehicle’s side. MRAP vehicles equipped with Iron Curtain and CROSSHAIRS should be ready for testing in July 2010. Meanwhile, there are also studies to integrate Iron Curtain with Hummers and with the LAV’s operated by the Marine Corps."

## + - French court fines eBay US\$2.5 million->

Submitted by
angry tapir writes "A French court has fined eBay US\$2.5 million for failing to comply with an earlier ruling that required the online retailer to prevent the sale of certain brands of perfume to French consumers on its sites. The ruling is related to one of three lawsuits brought by LVMH, a company that controls brands including Christian Dior, Louis Vuitton and Givenchy. The suits charged eBay with unlawful marketing of perfume brands that included Christian Dior, Kenzo and Givenchy as well as the sale of counterfeit items on eBay."
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## + - Can Google hack it in business?->

Submitted by GMGruman
GMGruman (1254692) writes "Robert L. Scheier analyzes Google Apps to see if it really can be trusted by businesses and governments. With the city of Los Angeles adopting Gmail, and Google steadily pushing its business cloud offerings, more organizations are tempted by the low price and promised simplicity of running equivalents to Microsoft Exchange, Office, and even SharePoint from Google. As Scheier discovers, many Google Apps can be meet business-level needs — but not all."
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