Quantum mechanics/Casimir effect in one dimension. Abstract The Casimir effect is interesting because it introduces the concept of Ramanujan summation of the divergent series, 1+2+3+4+..., and because it offers experimental evidence that empty space is not truly empty. Every step in this derivation of the Casimir effect uses straight-forward and familiar mathematics.
Man's Kidney Failure Linked To Massive Tea Consumption. The puzzling case of a 56-year-old U.S. man who suddenly developed weakness, fatigue and body aches is leading doctors to warn that massive consumption of tea may be responsible.
The side effects of drinking too much black tea include difficulty sleeping, headaches, nervousness, diarrhea, irritability, irregular heart rate, confusion, heartburn, tremors in your extremities and possibly convulsions. These side effects are all a result of the caffeine content in black tea. If you are used to drinking black tea regularly -- particularly in larger quantities -- you may develop a physical and psychological dependence on the beverage, again, primarily due to the caffeine content.