Good stuff from the folks at Rackspace....... kids describing the cloud. Turn up your speakers and enjoy!
Tuesday, January 22, 2013
Saturday, January 19, 2013
ASYMCO put up an interesting piece titled What's up with text messaging? yesterday about texting in Spain. Volume is dropping rapidly with Internet Protocol (IP) based message apps like Whatsapp, Apple's iMessage and Facebook messaging replacing a voice network based text protocol called Short Message Service (SMS). SMS has been around since 1982 and has become a real cash cow for wireless providers.
Here's more from that ASYMCO post:
- Whatsapp reported that it set a record of 18 billion messages processed over New Year’s Eve.
- In October Apple announced that iMessage had delivered 300 billion messages during the preceding 12 months.
- Globally SMS traffic is still rising. It’s expected to reach 9.6 trillion in 2012, but at least one analyst forecasts that SMS’s share of global mobile messaging traffic will fall from 64% in 2011, to 42% in 2016.
Expect similar results in the United States and other countries. Wireless providers have seen this coming for a while now and (I believe) it's the reason we've seen most implement data caps while, at the same time, encouraging customers to consume more data (translation - go over your data cap) using services like mobile video streaming.
If you want to know more about SMS and IP based texting I've got an earlier posted titled Why Are My iPhone Text Messages Sometimes Blue and Sometimes Green? linked here.
Thursday, January 10, 2013
I came into Electrical Engineering a different way than most - starting as a graduate student with an undergraduate degree in Microbiology. These two disciplines are slightly different - Microbiologists use microscopes and EE's use oscilloscopes :) I knew I had some catching up to do and remember one of my major goals for the summer before I started grad school was to learn how to use an oscilloscope. Fortunately I came across a free tutorial booklet from Tektronix on understanding and using an oscilloscope which made it pretty easy.
Well, even though that was over 30 years ago now, the Tektronix free tutorial materials still exist and they are even better than before. If you are starting from scratch or just want to brush up these are highly recommended. Here's a link to the tutorial page. Good stuff!
Wednesday, January 9, 2013
Electrical current flowing through any conductor (like the copper wires connecting his phone) will produce a surrounding electromagnetic field. If another conductor is within the surrounding field, an inductively coupled current will flow through the adjacent conductor.
There are two types of crosstalk, near end and far end.