google "baseband exploit"
Also, there is something called STK or simtoolkit ( a gsm standard protocol). Big business like banks can make deals with carriers to run apps securely with the sim card. It isn't used so much in the usa but the capability is there. The way the sim card gets programmed via specially formatted sms with the proper keys etc.
agree. I've often wondered how it is the nice people who put out "secure" apps and recommend them to dissidents, journalists, etc in oppressive regimes have never heard of baseband (radio) exploits. Also, apps can be run in the sim. The sim and baseband can be updated/programmed remotely. One doesn't know what's going on inside the sim or baseband.
Too many high school students get no theorems or proofs and memorize algorithms and have no idea what they mean. I corresponded with an online math prof recently while looking for some extra course work for my son and in part of his email he said: "We don't memorize too many equations in my class - we derive them". Maybe that approach isn't for everyone but I think it's better than the most.
Agree. You need a little of each of those things. Regarding bad teachers I thought the book by Liping Ma was interesting. A review: http://beta.metastudio.org/objects/2013/02/22/book-review-knowing-and-teaching-elementary-mathematics-liping-ma/
Seems chinese teachers with less education than their USA counterparts understand math far better. From the book:
"The situation of the two teacher is that the U.S. teachers have a shallow understanding of a large number of mathematical structures including the advanced ones, but the Chinese teachers have a deeper understanding of the elementary concepts involved in mathematics."
multatuli writes: Microsoft Corporation and Nokia Corporation today announced that the Boards of Directors for both companies have decided to enter into a transaction whereby Microsoft will purchase substantially all of Nokia’s Devices & Services business, license Nokia’s patents, and license and use Nokia’s mapping services.