Mission invisible? Managing boundaries for flood protection

A Mathematical Model for Flood Protection

Many regions in the world are protected against flooding by a dike, which may be either natural or artificial. We deal with a model for finding the optimal heights of such a dike in the future. It minimizes the sum of the investments costs for upgrading the dike in the future and the expected costs due to flooding. The model is highly nonlinear, nonconvex, and infinite-dimensional. Despite this...

Cookies Along Trust-Boundaries (CAT): Accurate and Deployable Flood Protection

Packet floods targeting a victim’s incoming bandwidth are notoriously difficult to defend against. While a number of solutions have been proposed, such as network capabilities, thirdparty traffic scrubbing, and overlay-based protection, most suffer from drawbacks that limit their applicability in practice. We propose CAT, a new network-based flood protection scheme. In CAT, all flows must perfo...

Managing the Mission Critical Environment

Mission critical environments present an entirely unique set of challenges to the systems manager. ‘‘Make it work and watch the budget’’ are the standing orders for most systems administrators, and yet in some situations the consequences of systems-related problems can be devastating, whereas in others the result is no more than inconvenience. As UNIX systems are increasingly at the heart of vi...

Dyspnea: recognizing and managing an invisible problem.

925 D yspnea, from the Greek words for hard and breathing, is a frequent symptom among seriously ill patients that increases symptom burden and alters quality of life (Desbiens, Mueller-Rizner, Connors, Wenger, & Lynn, 1999). Despite its frequent occurrence, little research exists to support evidence-based care for dyspneic patients with cancer who frequently are underdiagnosed and inadequately...

The importance of managing flood risk