Hassan Hossein-Mohand, Hossein Hossein-Mohand
Influence of motivation on the perception of mathematics by secondary school students
Frontiers in psychology
energydispersive xray spectroscopy edxs mapping scanning transmission electron microscope stem commonly used chemical characterization materials however stemedxs quantification becomes challenging phases constituting sample investigation share common elements overlap spatially paper present methodology identify segment unmix phases substantial spectral spatial overlap semiautomated fashion combining nonnegative matrix factorization priori knowledge sample illustrate methodology using sample taken electron beamsensitive mineral assemblage representing earths deep mantle retrieve true edx spectra constituent phases corresponding phase abundance maps enables us achieve reliable quantification trace elements concentration levels 100 ppm approach adapted aid analysis many materials systems produce stemedxs datasets phase overlap andor limited signaltonoise ratio snr spatiallyintegrated spectra