Abstract Background The majority of parthenogenetic vertebrates derive from hybridization between sexually reproducing species, but the exact number of hybridization events ancestral to currently extant clonal lineages is difficult to determine.Usually, we do not know whether the parental species are able to contribute their genes to the parthenoge
This paper proposes a novel metasurface-based monopulse antenna.A multimode pyramidal horn with four ports is selected as the feed of the proposed monopulse antenna.The 3-dB couplers and the optimized waveguide phase shifters are ass-masturbators employed to design the monopulse comparator.In order to obtain good sum and difference beams performanc
The article discusses the essence of a tourist attraction as an element of a tourist product.It was assumed that narrow-gauge railways Hookah Tongs are often considered a tourist attraction, which is understood as an interesting way of spending free time and learning about monuments and nature, means of transport, as well as an element of the tradi
Through the classification of current and historical aerial photosbetween 1973 and 2006, we analysed the evolution of size, shape and connectivity of 59 mountain meadows (maggenghi) of the Pejo district (Trentino, Northern Italy).The maggenghi are scattered patches within a forested matrix.We conducted the same analysis on an Austro-Hungarian cadas