Skyline queries represent a dataset by the points on its pareto frontier, but can become very large. To alleviate this problem, representative skylines select exactly k skyline points. However, existing approaches are not scaleinvariant, not stable, or must materialise the entire skyline. We introduce the maximum coverage representative skyline, which returns the k points collectively dominatin...

Commercial organizations increasingly need software processessensitive to business value, quick to apply, and capable of earlyanalysis for subprocess consistency and compatibility. This paperpresents experience in applying a lightweight synthesis of aValue-Based Software Quality Achievement (VBSQA) processand an Object-Petri-Net-based process model (called VBSQA-OPN)...

A small corps of 86 dedicated employees has become the most important “key” in the VA Prosthetic and Sensory Aids program. These men are our prosthetic representatives. Early in 1946, it was decided that some one person in each major field station must be given the specific job of carrying the new VA prosthetics program directly to disabled veterans. Such responsibility could not be given to th...

Selecting the best items in a dataset is a common task in data exploration. However, the concept of “best” lies in the eyes of the beholder: different users may consider different attributes more important, and hence arrive at different rankings. Nevertheless, one can remove “dominated” items and create a “representative” subset of the data set, comprising the “best items” in it. A Pareto-optim...

lthough fuzzy set theory and  sheaf theory have been developed and studied independently,  ulrich hohle shows that a large part of fuzzy set  theory  is in fact a subfield of sheaf theory. many authors have studied mathematical structures, in particular, algebraic structures, in both  categories of these generalized (multi)sets. using hohle's idea, we show that for a (universal) algebra $a$, th...

Efforts to characterize and understand the structure and behavior of the Internet have a long history in the network research community. Though our understanding of the network has evolved, our knowledge of its configuration, workload, and failure modes still is far from complete. Characterizing the operation of the current Internet infrastructure and its usage patterns is essential to improve ...

BACKGROUND The probability of HIV-1 transmission per coital act in representative African populations is unknown. We aimed to calculate this probability overall, and to estimate how it is affected by various factors thought to influence infectivity. METHODS 174 monogamous couples, in which one partner was HIV-1 positive, were retrospectively identified from a population cohort in Rakai, Ugand...

We consider the problem of assigning weights to a set samples or data records, with goal achieving representative weighting, which happens when certain sample averages are close prescribed values. frame finding as an optimization problem, in many cases is convex and can be efficiently solved. Our formulation includes special case selection fixed number samples, equal weights, i.e., selecting sm...