editorial

Today scientists are producing large volumes of data that they wish to explore and visualize. In this paper we describe a system that combines range-based queries with fast lookup to allow a scientist to quickly and efficiently ask “what if?” questions. Unique to our system is the ability to perform “cumulative queries” that work on both an intraand inter-time step basis. The results of such qu...

Facebook has established itself as one of the major players in social networking, claiming that it helps members connect and share with the people in their lives. But what if the people you want to connect and share with are your artistic collaborators? Can Facebook be used creatively, as a collaborative artistic environment? This paper explores the creative use of Facebook as a tool for creati...

Data envelopment analysis (DEA) is a method used for measuring the efficiency of decision-making units‎. Unlike the standard models‎, ‎which assume decision-making units to be a black box‎, ‎network data envelopment analysis focuses on the internal structure of these units‎. ‎Some researchers have developed a two-stage method where all the inputs are entirely used in the first stage‎, ‎producin...

This document includes some mathematical notions I will assume. Most of these are taught in a discrete math class, and in any case are not complicated and easy to pick up. You can read it at your own pace — it will take a few weeks until we’ll get to use all of this stuff. You do not have to do the exercises, and in any case don’t need to submit them. If you feel you’d like more clarifications ...