During human walking, the center of pressure under the foot progresses forward smoothly during each step, creating a wheel-like motion between the leg and the ground. This rolling motion might appear to aid walking economy, but the mechanisms that may lead to such a benefit are unclear, as the leg is not literally a wheel. We propose that there is indeed a benefit, but less from rolling than fr...

We present the discovery a giant low surface-brightness arc, of length ∼ 80 kpc in the Coma Cluster. The arc consists of a diffuse luminous matrix with surface-brightness μB < 26.5 mag arcsec and a number of embedded condensations. It is not associated with any giant galaxy in Coma in particular; neither does it have the properties of a gravitational arc. We argue that a fast interaction betwee...

We introduce evolutionary resampling and combine (erc) – a genetic algorithm based selection scheme for training examples for a multilayer perceptron (MLP) classifier. The erc method is compared to various adaptive resample and combine techniques arc-fs, arc-lh and arc-x4. To diminish the dependencies on the size of the training data set (TDS) and the missing consideration of test set performan...

Recently, Melhem presented a ”new” class of low-diameter interconnection (LDI) networks in this journal [10]. We note that LDI networks are the same as the previously known generalized de Bruijn graphs, point out an error in the decomposition of LDI networks into permutations, and find that the correct decomposition scheme is an instance of arc coloring for coset graphs. Hence, we pursue a numb...

This paper studies the high performance robust motion control of linear motors that have a negligible electrical dynamics. A discontinuous projection based adaptive robust controller (ARC) is first constructed. The controller guarantees a prescribed transient performance and final tracking accuracy in general while achieving asymptotic tracking in the presence of parametric uncertainties only. ...

Arc-removal is usually employed as part of an approximate inference scheme for Bayesian networks, whenever exact inference is intractable. We consider the removal of arcs in a different setting, as a means of simplifying a network under construction. We show how sensitivity functions, capturing the effects of parameter variation on an output of interest, can be employed to describe detailed eff...

Non binary constraints have recently been studied quite extensively since they represent real life problems very naturally. Specifically, extensions to binary arc consistency into generalised arc consistency (GAC), and forward checking that incorporates a limited amount of GAC have been proposed, to handle non-binary constraints directly. Enforcing arc consistency on the dual encoding has been ...

A new continuous formulation of Dynamic Traffic Assignment, where a user equilibrium is expressed as a fixed point problem in terms of arc flow temporal profiles, is proposed. The precise aim of the paper is to integrate spillback modelling into an existing formulation of DTA, based on implicit path enumeration, which is capable of representing explicitly the formation and dispersion of vehicle...

In this article, we consider path planning for car-like robots in a new way, adding a continuous-curvature condition to the paths. As the optimal paths are too complex to be used, we deene a type of continuous-curvature paths inspired of the Dubins' curves. These paths contain at most seven pieces, each piece being either a line segment, a circular arc or a clothoid arc (a clothoid is a curve w...

It has been long expected that there exists a deep connection between singularities of certain arc spaces and harmonic analysis over nonarchimedean fields. For instance, certain functions appearing naturally in harmonic analysis can be interpreted as the function attached to the trace of the Frobenius operator on what should be the stalks of the intersection complex of certain arc spaces, see [...