Seitzinger,+Austin

1-24-11 Airports have recently been uptight with their security. In my opinion, it is all for our safety and is a necessary precaution in case something happens. Currently, an new technology is being tested. These devices are able to scan the air, and other objects to detect microfibic fibers from TNT and other dangerous substances. It is stated in the article that this technology works well but is not ready for airport use. In a laboratory, there are controls of temperature, humidity, and overall environment. Airports however have people walking all over the place which could affect the readings of these devices. It all makes sense to me. The scientists working on this have the technology, they just now need to make it better.
 * AIRPORT SECURITY**

Austin, This was in a separate section of articles - keep it though because we may read it later! MW

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2-7-11 It's pretty amazing that there is so much thought into the exact weight of a kilogram. The fact that they keep it in safes and vaults means it must be pretty important to have in be precise. The one thing that surprised me the most is how Kelvin is one of the SI's and Celsius is not. In my opinion, Kelvin is not used as much as Celsius. Plus, Celsius is based of digits of ten. It would seem easier to change it to Celsius, but that is not my decision. The last thing that I thought was interesting was that there are only 90 kilograms available for exact weights. I would think that there would be hundreds, if not thousands across the world. At least there is one in Maryland just in case I need some exact weights. Overall, it's cool to think how much thought goes into keeping the Kilogram the same.

Austin, Yes it does boggle the mind to think about how important standards are and how precise they need to be. 5 stars! MW

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2-25-11 I never realized that there are different kinds of motion detectors. I always just figured that they were all aware of movements and could just sense things. I didn't think about how they can tell if something is moving. It kind of bums me out that lasers can't be red and visible like in movies and TV. Oh well. After reading all this though, I wondered what kind of motion detectors we have in this school. I always try to walk into the bathrooms without disturbing the sensors. But within 2 steps, the lights flash on. The sensors at this school could be pulsing devices or heat sensors. Either way, it is still cool. Overall, I think it's interesting how we discovered something that we can't even see. That's like me trying to find the Invisible Woman. It seems almost impossible. In the end, it's cool to no all about these waves in the world.

Austin, Not sure about the invisible woman reference but overall a good post. By the way I tried waving a stick in front of the motion detector on the hand dryer and it went off. Didn't try it with the light one. 5 stars. MW