Management of marine resources is supported by extensive use of acoustic data. Ecosystem management requires simultaneous observations of marine organisms and their interactions. The use of quantitative sonar combined with vertical oriented echo sounders is essential: the multi-frequency echosounder data is used to remotely identify acoustic scattering categories and the spatial distribution of...

Rynek monet kolekcjonerskich zaliczany jest do szerszej kategorii: inwestycji alternatywnych. W ostatnim czasie zauważalny wzrost zainteresowania inwestorów, oprócz rynku sztuki, właśnie rynkiem kolekcjonerskich, a w szczególności serią Skarby Stanisława Augusta, wyemitowanych przez Narodowy Bank Polski. Artykuły naukowe dotyczące inwestowania na polskim sektorze numizmatycznym są nieliczne – a...

the persian walnut (juglans regia l.) is one of the most important horticultural crops grown in iran. this research was conducted to determine the variation in walnut germplasm grown in the arak region of iran during the 2007-2008 growing seasons. all of the selected genotypes originated from seed, and their phenological and pomological characteristics were evaluated. results indicated that the...