Hot dry rock geothermal energy as a separate state from that of the continuum of permeable rock—just as one would consider a completely closed faucet as distinct from one that is open to any degree, whether the flow be a trickle or a flood. In the same way, HDR technology should be regarded as totally distinct from EGS. A definitive book on HDR development, including a full account of the experiments at Fenton Hill, was published by Springer-Verlag in April 2012. Hot dry rock geothermal energy Hot dry rock (HDR) is an abundant source of geothermal energy available for use. A vast store of thermal
Notes from the Underground (Hollywood Undead album) Notes from the Underground (Hollywood Undead album) Notes from the Underground is the third studio album by American rap rock band Hollywood Undead. Originally set to release in Summer 2012, "Notes from the Underground" was released on January 8, 2013 in the United States and Canada. The album charted at No. 2 on the Billboard 200 with over 53,000 copies sold in its first week, making it their highest charting album to date, despite its predecessor "American Tragedy" selling around 67,000 copies in its first week. The album has spawned a generally positive reception. Following extensive touring throughout 2011 to