OBJECTIVE The aim of this study was to determine how strongly the performance of navigation tasks is affected by changing electronic map interfaces and by individual differences in spatial ability. BACKGROUND Electronic map interfaces have two common configurations, north up and track up. Research suggests that north-up maps benefit some navigational tasks and track-up maps benefit others. Ho...

A model is proposed to demonstrate how neurons in the primary visual cortex could self-organize to represent the direction of motion. The model is based on a temporal extension of the Self-Organizing Map where neurons act as leaky integrators. The map is trained with moving Gaussian inputs, and it develops a retinotopic map with orientation columns that divide into areas of opposite direction s...

For those who experience it, is poverty a lasting or a temporary condition? What types of individuals and households are more likely to endure either "permanent" or "transitory" poverty, and what programs are more likely to be effective in reducing the two types of need? The answers to these questions have important bearing on the direction of government policy: short-term measures such as inco...

in this paper we present a new method for tool-path generation and adaptive interpolation for a three-axis cnc milling machine. this method satisfied the force and / or the error conditions by using a variable-direction variable-feedrate strategy based on maximum feedrate map. the proposed adaptive interpolator modifies the cutting path and the moving direction according to the actual instantan...

A method to segment a floor and an obstacle region from images, is a fundamental function for robots in real-world. This paper describes a floor detection method by integrating binocular stereo vision and whole body information, for walking direction control of a humanoid robot. We developed the humanoid robot navigation system using vision based local floor map. The developed system consists o...

When a superball is thrown forwards but with backspin, it is observed to reverse both direction and spin for a few bounces before settling to bouncing motion in one direction. The bouncing ball is modelled by a two-dimensional iterated map in terms of the horizontal velocity and spin immediately after each bounce. The asymptotic motion of this system is easily determined. However, of more inter...

in order to assess the outing mkhmlkvh forest park area of 430 hectares located in the northern city of khorramabad, gis technology was used. maps of the slope, direction and altitude in the software and arcview3.2 arcgis9.2 were prepared. then combine them with a map of the earth was formed. rvyhmgzary map with the land, soil and vegetation classes, environmental unit maps were prepared. units...

SUMMARY The densification of both permanent and temporary seismic networks has raised new interest in surface wave eikonal tomography from which phase velocity maps can be obtained without resolving a tomographic inverse problem. However, requires to reconstruct traveltime surfaces discrete number measurements at the station locations, challenging. We present method these with smoothing splines...