1 During 1918 there were many problems in the United States. 2  One of these major problems was the influenza. 3  Its symptoms were headaches, and queasy feelings in the stomach. 4  This disease had infected the people of Denver, and other cities across the nation.
Direct metal laser sintering (DMLS) is an additive manufacturing technique that uses a carbon dioxide laser fired into a magnesium substrate to sinter powdered material (typically metal), aiming the laser automatically at points in space defined by a 3D model, binding the material together to create a solid structure.
The print image must be inscribed on the drum first in order to transfer it to paper, and the drum's coating makes it receptive to light. Most laser printer drums are coated with selenium. Selenium is a nonmetallic element with photovoltaic and photo-conductive properties that make it ideal for this use.