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Threshold stoichiometry for beam induced nitrogen depletion of SiN

Measurements of the stoichiometry of silicon nitride films as a function of the number of incident ions using heavy ion elastic recoil detection (ERD) show that beam-induced nitrogen depletion depends on the projectile species. the beam energy, and the initial stoichiometry. A threshold stoichiometry exists in the range 1.3 > N/Si greater than or equal to 1, below which the films are stable agains

Storfjärilar som ökar sin utbredning: nytillskotten i storfjärilsfaunan i sydligaste Sverige under perioden 1973-2009

This study highlights the expansion of butterflies and macromoths occurring in southern Sweden. Recent changes in climate and habitat has been stressed as the main factors influencing changes in species distributions. Climate change implies an increase in temperature and some species are assumed to extend their northern ranges. In this study we compiled information about the first observations of