We present a model for infrared radiance contrast of native and crude oil covered water surfaces. This model is based on the so called "direct" approach by treating individual volumetric elements as incoherent radiators. The total emitted radiation is calculated by the sum of individual contributions from the oil film and the underlying water, respectively. Therefore, different temperatures can...

In this line of research, Caram de Assis (2002) traces a study on the values of transmission for diverse glass types. The glasses that presented the biggest superficial temperatures, as the term-absorbents, act as “radiators”, decreasing the air temperature in the interior of the prototypes. However, the colorless glass showed that temperature increases less with the sun incidence but the insid...

Large screens in semi-public spaces are already used in different organizations for presenting information. To make these information radiators work, the visualization and interaction have to be as attractive and intuitive as possible. In this paper, we present a new way of visualizing social activity streams on semipublic large screens. In order to keep the user interface simple, and to attrac...

The generation of radiation from free electrons passing a grating, known as Smith–Purcell radiation, finds various applications, including nondestructive beam diagnostics and tunable light sources, ranging terahertz toward X-rays. So far, the gratings used for this purpose have been designed manually, based on human intuition simple geometric shapes. Here we apply computer-based technique nanop...

In this paper, a multi-objective approach is applied to the design of aperiodic linear arrays of antennas. The adopted procedure is based on a standard Matlab implementation of the Controlled Elitist Non-Dominated Sorting Genetic Algorithm II. Broadside symmetrical arrays of isotropic radiators are considered with both uniform and non-uniform excitations. The work focuses on whether, and in whi...