Welcome toAtheist Universe
Sign Upor Sign In
Or sign in with:
Imagine No Religion
We are a worldwide social network of freethinkers, atheists, agnostics and secular humanists.
Give a Gift
Give a Gift
Give a Gift
Give a Gift
Appliances, machines, gadgets, apps, widgets and gizmos. They shape our lives and most of us couldn't survive without them.
Latest Activity: Jun 13
Started by Davy Oct 20, 2013.
Started by Michel. Last reply by Onyango Makagutu Apr 21, 2013.
Started by Michel Mar 26, 2013.
Started by Michel Mar 22, 2013.
Started by Michel. Last reply by Chris Apr 13, 2013.
Started by Michel. Last reply by abbylee Jan 6, 2015.
Started by Marc. Last reply by Davy Dec 15, 2012.
Started by Michel. Last reply by Chris Nov 10, 2012.
Started by Anti_Doone. Last reply by Michel Dec 3, 2012.
Started by Michel. Last reply by Adriana Sep 14, 2012.
By Matthew Yglesias
Today in feeling old, through Twitter I came across this question on SuperUser, a Q-and-A site "for computer enthusiasts and power users." Ready?
In Windows you have a C: drive. Everything labeled beyond that is with the following letter.
So your second drive is D:, your DVD is E: and if you put in a USB stick it becomes F: and the following drive G:. And so on and so forth.
But then, what and where are A: and B:?
The answer of course is that these are for your floppy disks! Perhaps A: would be for 5.25 inch disks and B: would be for 3.5 inch disks. Or then later you'd have a setup with one or two 3.5 inch drives and a C: drive for your hard disk. That's how computing worked in the 1980s and 1990s before optical disks started making the A: and B: slots obsolete.
Hey, i am not living in the future of the books i read as a kid
Might not survive moth infestation.
That is an interesting idea, Chris.
Most people know about light emitting organisms such as jellyfishes, fireflies and mushrooms. Some time ago, genetic engineers transferred genes responsible for the luciferin and luciferase proteins into a tobacco plant. These firefly proteins were then manufactured by the tobacco plant, causing it to glow and emit light.
What if this technology could be extended further to say, a maple tree or a juniper bush? Designer Audrey Richard-Laurent speculates on combining trees and streetlights into bioluminescent trees. In urban areas, one usually sees a row of trees parallel to streetlights. Why not hybridize them? An elegant, yet far fetched idea? Don’t be to sure. Already in 2007 Edward A Quinto of the International Society for Bioluminescence and Chemiluminescence produced a glowing christmas tree.
Bioluminescence works to replicate processes for creating light found in chemical reactions in the natural world–such as with certain jellyfish or bacteria–for human purposes. Chemiluminescence refers to the emission of light with limited emission of heat as a result of chemical reaction. Many researchers feel that both of these processes have the potential to produce sustainable, non-petroleum-based light sources.
Other potential applications might be glow in the dark designer pets, agricultural crops and domestic plants that luminesce when they need watering, new methods for detecting bacterial contamination of meats and other foods and glowing grass on golf yards that allow you to play golf after dark.
Ann Makosinski has a solution that could put an end to getting left in the dark. The 15-year old from British Columbia has invented a thermoelectric Hollow Flashlight that shines simply from the heat of your hand.
Makosinski determined that the heat of a person’s palm generates about 57 milliwatts of electricity — more than enough for the half of a milliwatt needed to illuminate her flashlight’s LED.
Key to the Hollow Flashlight are Peltier tiles, which generate electricity when one side of the tile is heated and the other is cooled. Makosinski mounted the tiles and other circuitry inside a hollow aluminum tube, where air inside the tube would cool one side of the tiles, while heat from the user’s hand would warm the other.
Her invention provided a modest amount of light and worked for a half hour at an ambient temperature of 50 degrees Fahrenheit.
“The flashlight I have made is more of a prototype then a final product, but the components in my device are quite strong,” Makosinski wrote. “Of course, if it was to be used and manufactured, I would try to seal off the electronic components in some sort of casing so that it wouldn’t get heavily exposed to the elements (example water), and therefore last longer.”
The Hollow Flashlight has earned Makosinski a spot among the 15 finalists at the Google Science Fair. In September, the Canadian teen will travel Google’s headquarters in Mountain View, California, where Google will choose a winner to receive a grand prize of $50,000 and a trip to the Galapagos Islands. Hear Makosinski wax eloquently about her invention in this video.
via NBC News Credit: Ann Makosinski, YouTube
Interesting about the Roman Concrete and how they produced it!
© 2018 Created by Atheist Universe.
Report an Issue |
Terms of Service
Please check your browser settings or contact your system administrator.