This paper proposes a risk scoring model to assess the performance of 27 US companies listed online by applying Data Envelopment Analysis (DEA) and comparing with the traditional financial measure Return on Equity (ROE). The DEA evaluation process involves two processes: (1) computation of...

A review of the methods and techniques used to win lithium from pegmatites, natural brines and clays. Additionally, the present procedures for extracting lithium metal from the chloride are outlined with purification and analytical methods discussed. Areas where research would be of benefit are...