. However, the use of such large amounts of radioactivity poses safety challenges in production and handling of the tracer, and can lead to significant radiolysis of the product32. Furthermore, the costs associated with using higher amounts of radioactivity may be difficult to justify if the ...
“Frankly, Chicago conditions before the war were the worst that this writer has ever seen anywhere,”Mathews wrote, citing a specific occasion when an entire antenna was“forcibly and thoroughly removed”thirty minutes before a scheduled relay time. When a replacement was built, it was manned wi...
When the sun went down, this little radio would pick up WKBW – AM1520, WLS – AM890, WCFL – AM1000, CKLW – AM800, and depending on atmospherics, lots of other AM radio surprises. Listening to radio when I was growing up was so exciting and every radio station sounded distinct and...
who built the world’s largest telescope four times in succession in the first decades of the twentieth century, emblematic of the turn towards “big science” in the US in the decadesbeforeWWII,Footnote5and who also founded the California Institute of Technology, Caltech. The Mt. ...
In the mid-1990s military radio systems were invented in which software controlled most of the signal processing digitally, enabling one set of hardware to work on many different frequencies and communication protocols. The first (known) example of this type of radio was the U.S. military’s ...
Since new technologies are constantly being invented, anyone can now easily create and distribute their own music. As a result, it’s possible to argue that the music market is now more saturated than it has ever been. Credibility is Built One of the finest methods for an artist to build ...
But the “gold” is when you look at the data from the perspective of an individual station. Still, it is revealing in its totality. Sure, music and personalities are major drivers. But when we pull back from the chart and look at a number of emotional benefits people derive from their...
The only reason we distinguish between bacteria, cheetahs, and ourselves is so paleontologists know what drawer to store the bones in. They even invented a fancy name:taxonomy. Taxonomy, the Dewey Decimal System of life, divides the natural world into arbitrary unnatural categories. ...
Access Control Facial Recognition Facial recognition software has advanced significantly since it was invented in 1964. Today, these biometric technologies can work hand-in-hand with Houston industrial security camera systems to provide a clear record of the activities of employees and guests at your ...
Electronic engineering can make a great career providing interest, challenges and good prospects Read more . . . Technology history Discover some of the stories that detail how the foundations were set in place for today's technology. We have a large number of pages devoted to pioneers, how...