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Slepian–Wolf coding
Slepian–Wolf coding losslessly compresses correlated data sources with separate encoders and a joint decoder, from a 1973 theorem by David Slepian and Jack Keil Wolf.
Slewing crane
A slewing crane, in practice usually called a slewing jib crane, is a lifting machine with a horizontal jib that rotates about a vertical axis, carrying a hoist for workstation lifting.
Slickline
Slickline is a single-strand, nonelectric steel wire spooled from a surface winch that runs, retrieves, and actuates downhole tools in live oil and gas wells without a workover rig.
Slide projector
A slide projector is an optical device that enlarges and displays photographic slides onto a screen, the standard means of showing photos from the mid-twentieth century until digital projection.
Slide rule
The slide rule, also called a slipstick, is a mechanical analog calculator using sliding logarithmic scales for multiplication and division, the standard engineer's tool until about 1970.
SlideShare
SlideShare, formerly LinkedIn SlideShare, is a slide hosting service for sharing presentations publicly or privately; founded in 2006, it was acquired by LinkedIn in 2012 and Scribd in 2020.
Sliding autonomy
Sliding autonomy, also known as adjustable autonomy, is a human-robot control approach where the division of control between operator and robot shifts dynamically during task execution.
Sliding door
A sliding door is a door that opens by moving horizontally along a track rather than swinging on hinges, saving floor space and enabling wide, glazed openings.
Sliding mode control
Sliding mode control (SMC) is a robust nonlinear control method that drives a system's state onto a prescribed sliding surface, making it insensitive to matched disturbances and model uncertainty.
Sliding mode observer
A sliding mode observer (SMO) is a state estimator, built on sliding mode control theory, that reconstructs a motor's back-EMF to estimate rotor position and speed without a sensor.
Sliding stability analysis
Sliding stability analysis checks whether a concrete gravity dam has enough shear resistance along a potential failure plane to resist horizontal forces from water pressure and uplift.
Sliding window protocol
A sliding window protocol is a method of reliable data transmission in which a sender may send a limited window of data before acknowledgements arrive; it underlies TCP flow control.
Sliding-window attention
Sliding-window attention (SWA) is an attention scheme in which each transformer token attends only to the previous w tokens, cutting per-token memory from O(S) to O(w).
Slido
Slido is a web-based audience interaction platform, owned by Cisco, where participants in meetings, lectures, and events submit questions, vote in live polls, and take quizzes without installing an app.
SLIM (lunar lander)
SLIM, short for Smart Lander for Investigating Moon, was a JAXA lunar lander that landed within 55 meters of its target near Shioli crater on January 20, 2024.
Slim Slime Robot
The Slim Slime Robot (SSR) is a snake-like robot built from six connected pneumatic modules, developed by Ohno and Hirose at the Tokyo Institute of Technology around 2000.
Slime mould algorithm
The slime mold algorithm (SMA) is a swarm-based metaheuristic for numerical optimization, proposed by Shimin Li and colleagues in 2020, that mimics the foraging behavior of slime mold.
SlimPajama
SlimPajama is a 627-billion-token cleaned and deduplicated English pretraining corpus for large language models, created by Cerebras in 2023 by filtering the 1.21-trillion-token RedPajama dataset and released under Apache 2.0.
Sling (weapon)
A sling is an ancient projectile weapon with a cord and pouch that launches stones or lead bullets, used for hunting, herding, and war since the Neolithic.
Sling bag
A sling bag is a compact bag worn on a single strap across the body, designed to swing from back to chest for quick access to its contents.
Slingsby Aviation
Slingsby Aviation, originally Slingsby Sailplanes, was a British aircraft manufacturer at Kirkbymoorside, North Yorkshire, best known for wooden training gliders from the 1930s and the T.67 Firefly military trainer.
Slingsby Hengist
The Slingsby Hengist was a British wooden troop-carrying military glider of the Second World War, of which eighteen were built, fourteen serving with the Royal Air Force.
Slingsby T.21
The Slingsby T.21, known in RAF service as the Sedbergh TX Mk.1, is a British two-seat, open-cockpit training glider first flown in 1944 that trained Air Training Corps cadets until the mid-1980s.
Slingshot
A slingshot, also called a wrist rocket or gulel, is a hand-held projectile launcher whose stretched elastic bands propel a small projectile from a Y-shaped frame.
Slip (aerodynamics)
A slip, also called a side slip, is uncoordinated flight in which the airplane moves somewhat sideways through the air; pilots use it to lose altitude or counter crosswinds.
Slip casting
Slip casting is a ceramic forming method in which a water-based clay slurry is poured into a porous plaster mold that absorbs the liquid, leaving a solid cast layer.
Slip detection
Slip detection is the recognition by a robotic or prosthetic gripper that a grasped object is moving, so grip force can be adjusted before it drops.
Slip forming
Slip forming, also called slipforming or sliding formwork, is a concrete construction method in which continuously moving formwork produces joint-free structures such as towers, chimneys, silos, and bridge pylons.
Slip ring
A slip ring, also called a collector ring, is an electromechanical device that transmits power and signals between a stationary structure and a rotating one.
Slip system
A slip system is the combination of a crystallographic slip plane and a slip direction along which dislocation motion produces plastic deformation in crystalline materials such as metals.