In this paper, we propose an ant-based algorithm for dynamic routing and wavelength assignment (RWA) in WDM optical networks under the wavelength continuity constraint. By adopting a new routing table structure and keeping a number of ants in the network to cooperatively explore the network states and continuously update the routing tables, our new ant algorithm can efficiently support the ants...

Widely tunable semiconductor lasers will play a critical part in future technologies. Tunable lasers are rapidly replacing fixed wavelength lasers in dense wavelength division multiplexing DWDM optical communications. The performance specifications of tunable lasers are the same as fixed wavelength specifications plus additional specifications that include: wavelength tuning range; wavelength s...

Tools for image-based 3D-reconstruction are commonly used cultural heritage applications; however, wider usage has increased variability in the quality of output 3D models. Geometric variations between models acquired with differing methods make metric conservation applications such as condition monitoring and measuring change over time challenging. This article presents an investigation wavele...

Camera-based pulse-oximetry has recently shown to be feasible, even when the signal is corrupted by noise and motion artifacts. Earlier work showed that using three instead of the common two wavelengths improves robustness of the measurement, however without a thorough investigation on the optimal wavelength selection. We therefore performed a search to identify these wavelengths to further imp...

Differential absorption lidar (DIAL) is widely accepted as the most promising remote sensing means to map the global CO2 concentrations. Nevertheless, diurnal variations and vertical distributions of atmospheric CO2 cannot be obtained by satellite-borne and airborne measurements. Ground-based DIAL systems are developed to fill this gap as well as serve as validations for satellite-borne measure...

A wavelength selection method that combines an inverse Monte Carlo model of reflectance and a genetic algorithm for global optimization was developed for the application of spectral imaging of breast tumor margins. The selection of wavelengths impacts system design in cost, size, and accuracy of tissue quantitation. The minimum number of wavelengths required for the accurate quantitation of tis...

Plant reflectance spectra, the profile of light reflected by leaves across different wavelengths, supply spectral signature for a species at spatial location to enable estimation functional and taxonomic diversity plants. We consider leaf spectra as “responses” be explained spatially. These are also functions over wavelength that respond environment. Our motivating data gathered several plant f...