Actually, professors are graded on the success of their students. If they perceive that the laptop/cell phone is preventing the students from learning, it is in their best interest to block their use during class. Also, why would you be attending class, only to ignore what is being discussed?
In Richard Feynman's book "What do You Care What Other People Think", I believe he said the real reason that the solid rocket booster failed, was from an under-specification on the torque by a factor of ten, on the joint where the shuttle connected to the booster. This resulted in a warping of the booster segments out of round. Each time the segments would get reused, they would get more out of round. Some were distorted by more than half an inch in diameter. The putty and o-rings would have to make up for a worse fit between segments as they were reused. Apparently, the Morten-Thiokol engineers had been quietly working on this problem for over a year when Challenger went down. Feynman said the o-ring was a red herring he was given to direct him away from the real problem.
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Why does the press report adverse effects from studies with no statistical power, when there are strong studies showing protective effects?
Actually, professors are graded on the success of their students. If they perceive that the laptop/cell phone is preventing the students from learning, it is in their best interest to block their use during class. Also, why would you be attending class, only to ignore what is being discussed?
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" Douglas Adams
I buy all my music directly from the independent musicians on their personal website or at concerts. I gave up on major label hacks a long time ago.
In Richard Feynman's book "What do You Care What Other People Think", I believe he said the real reason that the solid rocket booster failed, was from an under-specification on the torque by a factor of ten, on the joint where the shuttle connected to the booster. This resulted in a warping of the booster segments out of round. Each time the segments would get reused, they would get more out of round. Some were distorted by more than half an inch in diameter. The putty and o-rings would have to make up for a worse fit between segments as they were reused. Apparently, the Morten-Thiokol engineers had been quietly working on this problem for over a year when Challenger went down. Feynman said the o-ring was a red herring he was given to direct him away from the real problem.