News feature: A few good scientists
Researchers who have no financial entanglements with companies are a rare breed. Given that, asks Meredith Wadman, is the push to police conflicts of interest realistic?
Medical students protest perks from drug companies
Gifts can threaten students' integrity, critics say.
Mathematical Time and Physical Time in the Theory Of Relativity
In the Theory of Relativity time is an imaginary quantity that can not be observed; it is a multiplication of a number that indicates duration of material change and number i that is an imaginary number. i on the square is -1. Time i⁄t is a mathematical time that describes the speed and the duration of material change. In the Universe one can observe physical time only as a stream of material change. It is not that change run in physical time, change itself is physical time.. Distinction between imaginary mathematical time and visible physical time opens some new perspectives into interpretation of Theory of Relativity. c