In mobile robotics, pure geometric representations may not be well suited for navigation in large scale environments. New models combine topological and metrical information to give compact and eecient representations. In this paper, we brieey remind the outlines of the construction of our Vorono-like graph and give further details about its implementation in a real environment. Several trials ...

By electrically segmenting, and series-connecting an InP ridge laser, we have demonstrated 12-stage lasers with 409% differential efficiency and 2.6mA threshold, as well as 3-stage lasers with 51ohm input impedance and 126% differential efficiency.

In order to perform Preventive Maintenance (PM), two approaches have evolved in the literature. The traditional approach is based on the use of statistical and reliability analysis of equipment failure. Under statistical-reliability (S-R)-based PM, the objective of achieving the minimum total cost is pursued by establishing fixed PM intervals, which are statistically optimal, at which to replac...

Organic conductors exhibit unusual physical properties due to the critical nature of valence electrons fluctuating under localizing and delocalizing regime. Recently, we discovered that an organic superconductor, α-(BEDT-TTF)2I3 [BEDTTTF: bis(ethylenedithio)tetrathiafulvalene], induces optical second-harmonic generation (SHG) along with charge-ordering driven by the repulsive electron-electron ...

A new noninvasive method for determining the surface electrostatic potential and surface charge density of microscopic particles using second harmonic generation (SHG) is described. The surface electrostatic properties of 1.05 μm polystyrene sulfate spheres in aqueous solution and that of 0.22 μm oil droplets in aqueous emulsions are obtained. Comparisons of the surface potentials obtained from...

We study the effective second-harmonic generation (SHG) susceptibility in graded metallic films by invoking the local field effects exactly, and further numerically demonstrate that the graded metallic films can serve as a novel optical material for producing a broad structure in both the linear and SHG response and an enhancement in the SHG signal. ocis: 160.4330, 310.6860, 160.4670, 160.4760.

This study constructs a panel threshold regression model to explore the price impact of foreign institutional herding of firms listed in the Taiwan Stock Exchange during January 2000 to June 2008. Our panel threshold model is constructed to explore the price impact of foreign institutional investors’ herding in the Taiwan stock market after controlling the firm size. By examining the presence o...