A model-based control for fast autonomous four-wheel mobile robots on soft soils is developed. This control strategy takes into account slip and skid effects to extend the mobility over planar granular soils. Each wheel is independently actuated by an electric motor. The overall objective is to follow a path roughly at relatively high speed. Some results obtained in dynamic simulation are prese...

The k-wheel Wk is the graph obtained as a join of a vertex and the cycle of length k. It is proved that a subdivided wheel G embeds isometrically into a hypercube if and only if G is the subdivision graph S(K4) of K4 or G is obtained from the wheel Wk (k¿ 3) by subdividing any of its outer-edges with an odd number of vertices. c © 2003 Elsevier B.V. All rights reserved.

Introduction: Curiosity has been traversing across the northern plains of Gale Crater since August 2012 and on 1/6/17 (Sol 1571) has traveled over ~15 km (based on wheel odometry). The rover is approaching a prominent hematite-bearing ridge, which it will ascend to make measurements, thereafter continuing south up the slopes of Mount Sharp. Curiosity has already encountered multiple mobility is...

The mesolimbic reward pathway is implicated in stress-related psychiatric disorders and is a potential target of plasticity underlying the stress resistance produced by repeated voluntary exercise. It is unknown, however, whether rats find long-term access to running wheels rewarding, or if repeated voluntary exercise reward produces plastic changes in mesolimbic reward neurocircuitry. In the c...

Nest building was measured in "active" (housed with access to running wheels) and "sedentary" (without wheel access) mice (Mus domesticus) from four replicate lines selected for 10 generations for high voluntary wheel-running behavior, and from four randombred control lines. Based on previous studies of mice bidirectionally selected for thermoregulatory nest building, it was hypothesized that n...

This paper addresses the issue of development of a three wheel, four wheels and eight wheel Omni directional mobile robot. The Omni directional wheel is used in this research consists of 8 rollers made from synthetic rubber coated polypropylene rollers. All Omni wheel are independently powered using 3, 4 and 8 units of precision gear DC motors and the wheel/ motors assemblies where mounted dire...

plicated processes on the wheel surf ace along the wheel width. In order to make these processes clear, the experimental analysis of traverse grinding was conducted by widely changing the speed ratio, Kv, the setting depth of wheel, ‡TMT, and the number of total steps, m, (the ratio of the wheel width over the traverse feed per one revolution of the workpiece). The following results were obtain...

Three core symptoms of autistic spectrum disorders are stereotypic movements, resistance to change in routines and deficits in social interaction. In order to understand their neuronal mechanisms, there is a dire need for behavioral paradigms to assess those symptoms in rodents. Here we present a novel method which is based on positive reward in a customized wheel-running apparatus to assess th...

The wheel effect (also called the Wagon-wheel effect) is a well-known rotation illusion in which a rotating wheel, when displayed as individual frames, appears to rotate differently from its true rotation due to temporal aliasing. In this paper, we propose several approaches to solve this problem for synthetic imagery in computer animation. First, we develop an algorithm to compute the frame nu...