| We investigate through simple simulations some basic issues surrounding the use of marks for pricing in multiclass packet networks with multi-dimensional quality of service(QoS) prooles. We nd that the use of only one class of packets is not suf-cient to provide satisfactory multidimensional QoS performance in some simple situations. We also nd that by using appropriate control mechanisms (e....

4 SUMMER/FALL 1999 T’S A RACE with no starting point, no fixed course, and really no rules at all: walk, run, ride, do anything you want. Form a team, as big as you like. Build any sort of machine you wish with whatever money you can get your hands on. Just get to the finish line first. That finish line isn’t a particular place but a new understanding of a symmetry (or rather, an almost symmetr...

For decades, bioorthogonal reactions have pushed the frontiers of modern science. Using these selective chemistries, it is now possible to tag and retrieve bioactive metabolites directly from cells, generate libraries of complex drug molecules, and access dynamic materials for cell adhesion and patterning. The breadth of such achievements is remarkable, and as the bioorthogonal toolbox continue...

In this paper we present a natural interaction system that simulates an interactive mirror behavior where a subject or object can appreciate in real time the effects of external agents over themselves and the causes or actions that trigger these effects. It is a low cost system and easy to use, personalize and configure, which makes it extensible to different operating sectors, especially on th...

Demonstrating compliance with the applicable regulations for the Waste Isolation Pilot Plant (WIPP) requires an assessment of the Iong-term performance of the disposal system. Scenario development is one starting point of this assessment, and generates inqui~ about the present state and fiture evolution of the disposal system. Scenario development consists of four tasks: (i) identi&ing and clas...