The PA Distance Learning Project provides adult basic education and ESL classes at a distance for students from all over Pennsylvania.
Friday, December 17, 2010
Feel Free to Comment!
What Do Hot Beverages Have to Do With Politics?
Wednesday, December 15, 2010
Wikipedia
Remember, the more you read, the more you know!
Sitting Bull and General Custer
Tuesday, December 14, 2010
Saturday Night Live Released on This Date in 1977
Blog Changes
Cultural literacy is more than reading. It is having the background knowledge to make the most of your reading. Have you ever started watching a movie in the midde, so that you didn't really know what was going on? That's how a lot of people feel when they read a newspaper. One of my goals for this blog is to help fill in those gaps!
Race to the South Pole
Monday, December 13, 2010
Thank Marconi for Radio!
Do you know who Marconi was or what he had to do with the radio?
Guglielmo Marconi was an Italian inventor who lived from 1874 until 1937. He won a Nobel Prize in Physics in 1909 for his work in wireless telegraphy. Before Marconi, we had telegraphs, but they could only be used with a network of cables and wires. Marconi proved that it was possible to not only transmit information via wireless radio waves, but he was the first person to send such signals across the Atlantic Ocean. Other scientists believed, correctly, that wireless radio waves would be lost after travelling approximately 200 miles, because the would continue to travel in a straight line, rather than follow the earth's curvature; however, after much experimentation, Marconi was able to bounce signals off the Earth's ionosphere to reach a receiver in Newfoundland, Canada.
Marconi's wireless system was widely used on ships to maintain contact with the mainland. One of those ships was the RMS Titanic. The radio controllers aboard the Titanic who sent out the distress signal were employed by Marconi's company, Marconi International Marine Communication Company. Only one survived the sinking. Despite his injuries, he helped the radio controllers aboard the rescue ship, RMS Carpathia, to send wireless messages to New York regarding survivors, and to send messages from survivors to loved ones. Marconi's invention saved the lives of 706 passengers that night. Without it, more than 2,223 lives would have been lost.
Think about that the next time you turn on the radio!