This article addresses the visual area coverage problem using a team of Unmanned Aerial Vehicles (UAVs). The UAVs are assumed to be equipped with a downward facing camera covering all points of interest within a circle on the ground. The diameter of this circular conic-section increases as the UAV flies at a larger height, yet the quality of the observed area is inverse proportional to the UAV’...

A coverage function f over a ground set [m] is associated with a universe U of weighted elements and m sets A1, . . . , Am ⊆ U , and for any T ⊆ [m], f(T ) is defined as the total weight of the elements in the union ∪j∈TAj . Coverage functions are an important special case of submodular functions, and arise in many applications, for instance as a class of utility functions of agents in combinat...

The likelihood of line-of-sight (LoS) is an essential component in any radio channel model. It is particularly useful for radio network planning and urban coverage prediction. Empirical LoS models are hard to derive due to a strong dependency on local topology and the need for large measurement datasets. Since buildings are the major obstructions in a dense urban environment, we propose a new t...

Solar radiation at ground level is a necessary input for several applications such as primary production and agronomic related studies or potential solar energy assessments. The user needs consist generally in values of global daily or hourly irradiation with a spatial resolution of approximately 10 km. Relative errors (RMSE) of daily irradiation should be less than 20 %. Spatial coverage (cont...

This paper describes the capability of remote sensing in the monitoring of rangeland vegetation productivities and dynamics in the foothill areas of Uzbekistan, in order to enhance the sustainable utilization of natural resources. Seasonal productivity, including above-ground biomass, density, coverage, foliar chlorophyll, and carotene content, was measured for the Artemisia diffusa, the domina...

Many reliability prediction techniques require an estimate for the number of residual faults. In this paper, a new theory is developed for using test coverage to estimate the number of residual faults. This theory is applied to a specific example with known faults and the results agree well with the theory. The theory is used to justify the use of linear extrapolation to estimate residual fault...

Over the past few years several automatic and semi-automatic PET segmentation methods for target volume definition in radiotherapy have been proposed. The objective of this study is to compare different methods in terms of dosimetry. For such a comparison, a gold standard is needed. For this purpose, realistic GATE-simulated PET images were used. Three lung cases and three H&N cases were design...

We describe some of the science programs that drive the need for the next generation ground-based OIR telescope. The programs are chosen to illustrate the power of such a telescope to enable new kinds of science via combinations of sensitivity, field-of-view, wavelength coverage, and spectral resolution.

This paper outlines a model-based approach for testing the robustness of computer vision solutions with respect to a given task or application. The outlined approach enables the automatic generation of test data with a measurable coverage of optical situations both typical as well as critical for a given application. In addition correct ground truth data is generated, all with almost no manual ...