This article presents an approach to improve and monitor the behavior of a skid-steering rover on rough terrains. An adaptive locomotion control generates speeds references to avoid slipping situations. An enhanced odometry provides a better estimation of the distance travelled. A probabilistic classification procedure provides an evaluation of the locomotion efficiency on-line, with a detectio...

This paper considers prediction of slip from a distance for wheeled ground robots using visual information as input. Large amounts of slippage which can occur on certain surfaces, such as sandy slopes, will negatively affect rover mobility. Therefore, obtaining information about slip before entering a particular terrain can be very useful for better planning and avoiding terrains with large sli...

introduction: sexhormones are one of most important factors in difference of learning and memory between tow sexes (male & female). high concentration of estrogen and androgen receptors and mechanism of testosterone and estrogen production in learning and memory center, especially in hippocampus show the role of this receptors, sexhormons and p450 enzymes in spatial memory. consequently, in thi...

Escape performance is fundamental for survival in fish and most other animals. While previous work has shown that both intrinsic (e.g. size, shape) and extrinsic (e.g. temperature, hypoxia) factors can affect escape performance, the possibility that behavioural asymmetry may affect timing and locomotor performance in startled fish is largely unexplored. Numerous studies have found a relationshi...

We present a detailed ns-2 [1] based simulation analysis on four of the prominent mobile ad hoc network routing protocols: Dynamic Source Routing (DSR) protocol [2], Associativity-Based Routing (ABR) protocol [3], FlowOriented Routing Protocol (FORP) [4] and the Routelifetime Assessment Based Routing (RABR) protocol [5]. The simulations were conducted with and without transmission power control...

ABSTRACT Vehicular adhoc network or VANET is special types of adhoc network consists of moving cars referred to as nodes; provide a way to exchange any information between cars without depending on fixed infrastructure. For efficient communication between nodes various routing protocols and mobility models have been proposed based on different scenarios. Due to rapid topology changing and frequ...

Call a path an escape path if it eventually leads out of the forest no matter what the initial starting point or the relative orientations of the path and forest. To solve the "lost in a forest" problem we must find the "best" escape path. Bellman proposed two different interpretations of "best," one in which the maximum time to escape is minimized, and one in which the expected time to escape ...

Research on Wireless Sensor Networks (WSNs) has recently received much attention as they offer an advantage of monitoring various kinds of environment by sensing physical phenomenon. Many WSN protocols and applications assume the knowledge of geographic location of nodes to report data that is geographically meaningful and services. Locations of nodes can be determined by a number of localizati...

background: the cholinergic system plays an important role in learning and memory. administration of extracts of curcuma longa or its constituent, curcumin, have some roles in cognitive function in animals. the aim of the present study was to investigate the effects of curcumin in preventing spatial performance impairment induced by scopolamine, a cholinergic receptor antagonist, in rats using ...