Sex, Drugs, and a Few Other Things

Mathematics of sparsity ( and a few other things )

In the last decade, there has been considerable interest in understanding when it is possible to find structured solutions to underdetermined systems of linear equations. This paper surveys some of the mathematical theories, known as compressive sensing and matrix completion, that have been developed to find sparse and low-rank solutions via convex programming techniques. Our exposition emphasi...

Getting a Few Things Right and Many Things Wrong

Tropes and Other Things

Our day-today experience of the world regularly brings us into contact with middle-sized objects such as apples, dogs, and other human beings. These objects possess observable properties, properties that are available or accessible to the unaided senses, such as redness and roundness, as well as properties that are not so available, such as chemical ones. Both of these kinds of properties serve...

Sex under Influence of Drugs: A Nationwide Survey among Iranian Female Sex Workers

Background: Due to the high level of sexual relationships, prostitute women are faced with many dangers, including acquired immune deficiency syndrome (AIDS), sexually transmitted infections (STIs), fertility problems, drug use, etc. In this regard, addict prostitute women are exposed to more risks because drug use is considered as an outstanding factor in thos...

Trust, entrustment decisions and a few things we shouldn’t forget

For many decades, medical educators have been struggling with assessment, as illustrated by the predominance of assessment in medical education research as well as the ongoing profound and sometimes heated discussions about how to best assess trainees’ competence and development [1–3]. In any event, efforts to change assessment systems are oriented towards the goal of improving health care qual...