Alpha Radiation Visualizer

Alpha detector

Have a webcam and a smoke detector? If you do you can make a clever alpha particle visualizer. An alpha particle is an ionizing form of radiation that is made up of two protons and two neutrons. It’s powerful but doesn’t penetrate very far, paper or your skin is enough to stop them. Inside smoke detectors is a tiny chunk of americium that produces alpha particles when it decays. If you place some of this near the CCD of a web cam you can see flashes of white light as the particle strikes the capacitors and over charges them. Over time this could destroy the device, as radiation can do to space craft or robots that work near harsh radioactive sources, but in this case it makes for a good practical visualization of radiation. This would make for a fine science fair project.

[via hack-a-day

Alpha Radiation Visualizer – Overview

STS-121 Crew To Fly July 1

 

NASA Space Flight - STS-121 

Amid heated discussions about the safety of the foam insulation on the main fuel tank, the orbital vehicle Discovery will take to the sky on July 1.

The STS-121 mission will visit the International Space Station and continue evaluating new shuttle safety improvements. At least two spacewalks are planned during the 12-day mission, which also includes repair work to the station.

[via SPACE.com]

NASA Space Flight – STS-121

Monster CCD Sensor Has 111 Million Pixels

 

Wow. This is going to make one heck of a camera for a telescope. I can see a market for these with medium and large format camera users. A sensor this size would make a nice replacement for a film back on a 4×5 view camera.

Dalsa Semiconductor has fabricated an image sensor with more than 111 million pixels. The company claims the 4 x 4-inch charge-coupled device, configured as 10,560 x 10,560 pixels, is the world’s highest-resolution image sensor and the first to break the 100 million-pixel barrier.

EETimes.com – Record CCD image sensor has 111 million pixels

Organ Donor Club Grows…

Organ cooler
In 2002 Dave Undis started a non-profit group called LifeSharers. The idea behind it was that if you join the club you agree to donate your organs or tissues to members after your death If upon your death no club members need your organs, or there isn’t a match, they are offered to non-club members. Sounds like a darn fine idea to me. Every year thousands of viable organs are disposed of in graves and hundreds of people that need new hearts, livers, lungs die because there aren’t any matches to them or they are too far down on the list. The club is free, so it’s not exclusive. Rich and poor get the same chance, if your a member. Mr. Undis realized that there wasn’t enough incentive to get people to donate their organs. Many people feel that a program like this is unfair to people but to them I say join the club. If more people agreed to give the gift of like after their deaths then a program like this wouldn’t be needed.

It might sound ghoulish to want to join a club like this but I look at it as being like free insurance. No, not insurance, because that’s a sure thing. Something gets broken, you file a claim, you get money. This is more like an inside tip on a race. It isn’t 100% certain that your going to win (a suitable donor still might not be there for you when you need it) but it lowers the odds that your not even going to place. I’ve never thought too much about transplants because like everyone else I figured I’d never need one. Heck, I haven’t even known anyone that’s needed an organ transplant. I’m sad to say that this has changed. My mother in law has been diagnosed with cirrhosis of the liver due to the side effects of a medication that she was taking. She is waiting on a suitable liver to become available for some time now. I only hope that one becomes available soon.

For more information becoming an organ or tissue donor: 

For more information on LifeSharers, visit www.lifesharers.org or call 888-ORGAN88.

To register as an organ donor, call 800-94DONOR and make your wishes known (from U.S. Department of Health and Human Services):

1. Indicate your intent to be an organ and tissue donor on your driver’s license.

2. Carry an organ donor card. (http://www.organdonor.gov/signup1.html)

3. Most important, discuss your decision with family members and loved ones.

[via Physorg]

ABC News – A ‘Members Only’ Club for Organ Donors