Science of bulk solids
There are many resources and publications available over the internet for those more interested in the science behind bulk solids and powder technology. Some of these resources include:
http://www.powderbulksolids.com
http://www.jenike.com
http://www.kona.or.jp/index_e.html
http://www.chemicalprocessing.com/resource_centers/powder_solids.html
http://www.asce.org/PPLContent.aspx?id=17273
http://www.bulk-solids-handling.com/
http://www.aiche.org/publications/aichejournal/index.aspx
http://en.wikipedia.org/wiki/Geotechnical_engineering
http://www.erpt.org/retiredsite/default.htm