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Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the ...
4D scanning transmission electron microscopy (4D STEM) is a subset of scanning transmission electron microscopy (STEM) which utilizes a pixelated electron detector to capture a convergent beam electron diffraction (CBED) pattern at each scan location. This technique captures a 2 dimensional reciprocal space image associated with each scan point ...
4DCT. Lung motion in 4DCT. Four-dimensional computed tomography ( 4DCT) is a type of CT scanning which records multiple images over time. It allows playback of the scan as a video, so that physiological processes can be observed and internal movement can be tracked. The name is derived from the addition of time (as the fourth dimension) to ...
Jordan Thompson, left, and Max Purcell of Australia as they face JJ Tracy and Robert Cash of the U.S.A. in men's doubles round 1 during the Cincinnati Open at the Lindner Family Tennis Center in ...
In physics, spacetime, also called the space-time continuum, is a mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum. Spacetime diagrams are useful in visualizing and understanding relativistic effects, such as how different observers perceive where and when events ...
Between the Golden Voyager, Tom Cruise, and the Red Hot Chili Peppers, there wasn't much room for anyone to stand out, but that's exactly what French singer Yseult was able to accomplish as she ...
Right now, you can score a pair of the shopper-loved shoes for just $20 (down from $36) — that's over 40% off! We haven't seen the price drop any lower since 2021; it's also the lowest these ...
Sensitivity time control. Sensitivity time control ( STC ), also known as swept-gain control, is a system used to attenuate the very strong signals returned from nearby ground clutter targets in the first few range gates of a radar receiver. Without this attenuation, the receiver would routinely saturate due to the strong signals.