Brainstem slices of similar thickness prepared with a similar protocol for electrophysiological recordings remain usable for several hours.
They trawled Biscayne Boulevard for a usable causeway for four hours.
"We came up with a usable photograph within 48 hours".
Once you enter your address, you'll see how many hours of usable sunlight you can expect to get out of your panels and much you could save by installing solar panels.
The module carries 5,000 watt-hours of usable energy in its lithium-ion-nanophosphate battery, compared with only a few hundred watt-hours of effective capacity for the nickel-metal-hydride battery built into the Prius, the one that is charged by the engine or by electricity generated as the car slows down.
It runs Android, has a touchscreen display, WiFi networking, 3GB of usable memory, a six hour battery life, etc etc.
The face design itself offers a lot of usable info, including 24 hour markers on the inner ring, but even with the small second hand dial, the face doesn't feel cluttered.
The epic 10 hours or so of usable music they created Yorke edited down into a new album, adding lyrics and again working closely with Godrich.
It's a good balance of portability, usable size, and battery life (6-7 hours when careful!).
For example, a few weeks ago someone asked me if I wanted to try the Smart CARA (the Food Cycler in the U.S ., a Korean composting machine that turns food waste into healthy, usable potting soil in about four hours.
