What constraints govern the physical process of computing? Is a minimum amount of energy required, for example, per logic step? There seems to be no minimum, but some other questions are open Editor's ...

The earned value method is a means for evaluating the progress of a budgeted project. Originally used to evaluate U.S. federal projects, such as building railways and military contracts, it can be ...

Abstract We introduce a family of piecewise isometries. This family is similar to the ones studied by Hooper and Schwartz. We prove that a renormalization scheme exists inside this family and compute ...