Here is a 2015 paper with a detailed technical analysis. The first author on this paper is the Iraqi engineer interviewed in this Guardian article. http://pure

Here is a 2015 paper with a detailed technical analysis. The first author on this paper is the Iraqi engineer interviewed in this Guardian article. http://pure.ltu.se/portal/files/102425643/Vol_5_3_8.pdf http://pure.ltu.se/portal/files/102425643/Vol_5_3_8.pdf