For decades, fuel cell innovation has been guided by two main benchmarks: cost per kilowatt and stack durability. These remain important, especially in applications driven almost entirely by project ...

Method A/B is a test that can be performed in a melt flow rate tester so as to calculate the value of the polymer’s melt density at a certain temperature. Both a “method A” test and a “method B” test ...

The number of bits per square inch of storage surface. It typically refers to magnetic disk and tape, where the number of bits per inch (bpi) times the number of tracks per inch (tpi) yields the areal ...

Refers to the concentration of pixels on a particular display, measured in pixels per inch (ppi). Pixel density is calculated by dividing the diagonal pixel resolution of a display by its diagonal ...