There is a growing consensus as to the characteristics of conservative treatments for obesity. We will begin by describing these characteristics without attempting a precise definition. Conservative treatments can be characterized in a negative sense as treatments other than surgery or adjunctive instruments such as gastric balloons, very-low-calorie diets, or pharmacotherapy. They can be chara...

We consider the problem of constructing systems of hyperbolic conservation laws in one space dimension with prescribed eigencurves. This yields an overdetermined system of equations for the eigenvalues-to-be. These equations are analyzed with techniques from exterior differential systems.

Social laws – sets of constraints imposed on the behaviour of agents within a multi-agent system with the goal of some desirable overall behaviour resulting – are an important mechanism for coordinating multi-agent behaviour. When considering social laws in human environments, the inspiration for social laws in multiagent systems, we argue that a key design principle is least change. That is, s...

Generalizations of the strict and loose consensus methods to the supertree setting, recently introduced by McMorris and Wilkinson, are studied. The supertrees these methods produce are conservative in the sense that they only preserve information (in the form of splits) that is supported by at least one the input trees and that is not contradicted by any of the input trees. Alternative, equival...

Cambrian Orsten-type fossils have yielded specimens with a uniquely detailed morphology from the early stages of animal evolution. A newly discovered crustacean larva illustrates how morphology and lifestyle over half a billion years ago closely resembled those of extant relatives.

Traditional explicit numerical discretizations of conservative systems generically predict arti cial secular drifts of nonlinear invariants. These algorithms are based on polynomial functions of the time step. We discuss a general approach for developing explicit algorithms that conserve such invariants exactly. We illustrate the method by applying it to the truncated two-dimensional Euler equa...

This note offers an alternative to a proposal by Rob Arthan for a simpler and more powerful replacement for the mechanisms currently provided in the various HOL implementation for defining new constants.