I n chemistry, a derivative is defined by the Merriam-Webster dictionary as a “substance related structurally to another substance and theoretically derivable from it” or “a substance that can be made from another substance.” Derivatives in finance work on the same principle. They are financial instruments whose promised payoffs are derived from the value of something else, generally called the...

abstract empathy is a cognitive but not emotional trait that consists of understanding (and not sensing), experiences, concerns and  views ofpatients and the capacity to share this understanding. some medical educationists believe that clinical education may have a negative effect on medical students and residents'empathy and steps should be taken for teaching empathy to medical students.our ma...

one of the duties of the husband in marriage is to pay alimony. in this regard, the shiite scholars disagree in some areas, for example, in case of high treatment costs, if the cost of treatment is very significant, the scholars do not agree on whether the husband should pay or not. accordingly, in this paper, the ideas of jurists and lawyers in this regard seem to be that the man should pay an...