An improved method of measuring the coefficient of sliding friction of floor products is described, whereby similar measurements are made on laboratory samples and floors. An average value over the surface and a trace showing the local variations in friction across the surface are obtained. The latter facilitates studies of the efficiency of geometric projections and other surface effects that ...

The serviceability design of wood-framed residential floors in Canada has taken a departure from use of the traditional deflection criterion based on maximum deflection under uniform loading. This departure is based on laboratory and field research in the 1970's and 1980's which, in 1990, led to adoption of a new criterion in the National Building Code of Canada. In part, this criterion is base...

The set of dominant regions of the k-Catalan arrangement of a crystallographic root system Φ is a well-studied object enumerated by the Fuß-Catalan number Cat(k)(Φ). It is natural to refine this enumeration by considering floors and ceilings of dominant regions. A conjecture of Armstrong states that counting dominant regions by their number of floors of a certain height gives the same distribut...

In this paper, we address the problem of automatically creating a meaningful spatial representation of 3D virtual environments, suitable for spatial reasoning. We propose a spatial analysis technique that distinguishes indoor, outdoor and covered parts of the environment. It also separates buildings into floors linked by stairs and represent floors as rooms linked by doorsteps. On this basis, w...

In this paper, we purpose a new holonomic omni-directional mobile robot that can move on not only flat floors but also uneven environment. A prototype robot can move in omni-direction, run on the uneven floors and slopes, and pass over large steps. The robot has seven universal wheels that have twelve cylindrical free rollers. We adopt a passive suspension system that enable the robot to change...

This paper uses the Fran system for functional reactive animation to give a simulation of a lift – or elevator – with many floors. The paper first introduces a two-floor version, and then indicates in detail how this is extended to give a simulation with an arbitrary number of floors and featuring more realistic animated graphics. The paper introduces those aspects of Fran relevant to the simul...