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T+5 minutes, 45 seconds Sensor problem shut SSME No. 1 down. Mission continued in lower than planned orbit. Only non-RSLS abort during the entire program. 1993-03-22 Columbia: STS-55: RSLS T−3 seconds Problem with purge pressure readings in the oxidizer preburner on SSME No. 2. All engines replaced on pad. 1993-08-12 Discovery: STS-51: RSLS T ...
Outcome switching is the practice of changing the primary or secondary outcomes of a clinical trial after its initiation. An outcome is the goal of the clinical trial ...
NASA hired Boeing and SpaceX to ferry astronauts to and from the space station, after the shuttles retired in 2011. SpaceX flew its first crew in 2020. Boeing stumbled on its first test flight without a crew and then fell further behind after a repeat demo.
A switch using store-and-forward transmission will receive (save) the entire packet to the buffer and check it for CRC errors or other problems before sending the first bit of the packet into the outbound link. Thus, store-and-forward packet switches introduce a store-and-forward delay at the input to each link along the packet's route.
In telephone switches, time-slot interchange switches usually form the outer layer of the switching fabric at a central office's switch. They take data from time-multiplexed T-1 or E-1 lines that serve neighborhoods. The T-1 or E-1 lines serve the subscriber line interface cards (SLICs) in local neighborhoods.
Each patient will be assigned one of the following categories: 1) complete response, 2) partial response, 3) stable disease, 4) progressive disease, 5) early death from malignant disease, 6) early death from toxicity, 7) early death because of other cause, or 9) unknown (not assessable, insufficient data).
The researchers gave participants three chances to try to balance unsupported on one leg for 10 seconds during an initial checkup. ... muscle strength after the age of 35 at a rate of 1 to 2 ...
Automatic test system switching test equipment allows for high-speed testing of a device or devices in a test situation, where strict sequences and switching combinations must be observed. Automating the process in this way minimizes test errors and inaccuracies, and only systematic errors are generally encountered due to an incorrectly ...