Proposed two new directional cavity antennas are filling the gap between the short-backfire antenna (SBFA) and small parabolic-reflector antennas, which can be used in satellite communications also.
COBISS.SI-ID: 7675476
The paper describes the generation of a digital surface model (DSM) and orthoimages from panchromatic and multispectral Ikonos stereopairs. It assesses the suitability of the images for vegetation height mapping of a large area and the applicability of the results for various spatial analyses. For evaluation purposes it was compared to very accurate lidar elevation data. The analysis revealed an overall vertical difference between the models of 8.2 m, where only one third of the differences are below 3 m.
COBISS.SI-ID: 32342829
The paper gives a comparison of analytical hill-shading and sky-view factor. Analytical hill-shading is the most frequently used relief visualization technique, but it has several drawbacks: the most critical being its inability to represent linear objects that lie parallel to the direction of the light source and saturation of shadow areas. Authors present a method to calculate sky-view factor that overcomes these problems. It is based on diffuse illumination and can effectively visualize the relief.
COBISS.SI-ID: 32345645
The paper describes investigation of efficiency of organic solar cells based on P3HT: PCBM (1:1) blends. The non-linearity and asymmetry of current voltage-characteristics were explained on the base of electrode/organic semiconductor interface behavior.
COBISS.SI-ID: 1417467
ITO/PEDOT/P3HT:PCBM(1:1)/LiF/Al photovoltaic cells were prepared by spin coating technique, using optical glass substrates covered with a thin ITO layer. The cell parameters in regime of photo-element were determined and their dependence on the thickness of the LiF layer are presented.
COBISS.SI-ID: 1736187