Callum Regan, Phillip Von Rosen, Susanne Andermo, Maria Hagströmer, Unn-Britt Johansson, Jenny Rossen
The acceptability, usability, engagement and optimisation of a mHealth service promoting healthy lifestyle behaviours: A mixed method feasibility study
Digital health
work 960 ris coins period brazil colony portugal analyzed using xray fluorescence xrf spectrometry history coins dated end 17th century beginning 19th century great influence immigration portuguese prince regent joo brazil arrived 1808 bearing mind need expand timid brazilian monetary system portuguese crown decided collect spanish silver pesos 8 reales recoined value 960 ris recoinage procedure carried using stamp therefore many cases possible check base currency work investigated 17 samples 960 ris coins xrf base coin 8 reales manufactured raw materials mexican mines addition characterizing elemental composition coins xrf data evaluated using multivariate statistical method robust principal component analysis robpca used classify coins based elemental composition however xrf elementary information obtained depth micrometers one essential issues agcu metal alloys ag enrichment cause changes elemental composition surface therefore initially study carried verify whether surface compositions coins altered ag enrichment