Technology and the built world

Station-keeping

Station-keeping is the maintenance of a satellite's assigned orbital position against natural perturbations: geostationary satellites burn propellant to stay within a control box of about ±0.1° in longitude and inclination.

Stationary wavelet transform

The stationary wavelet transform (SWT), also called the undecimated wavelet transform, is a variant of the discrete wavelet transform that omits downsampling, restoring translation invariance and improving denoising.

Stationery

Stationery is the collective term for writing and office materials such as paper, pens, and envelopes; in a narrower sense it means special paper for writing letters.

Statiq

Statiq is an Indian electric vehicle charging company founded by Akshit Bansal and Raghav Arora in 2019, operating a public charging network backed by Y Combinator and Shell.

Statistical classification

Statistical classification, also called pattern classification, is the machine learning task of predicting which class an example belongs to, using methods such as logistic regression and support vector machines.

Statistical energy analysis

Statistical energy analysis (SEA) is a vibro-acoustics method predicting high-frequency vibration and sound by balancing energy between coupled subsystems, used on aerospace vehicles and other large lightweight structures.

Statistical learning theory

Statistical learning theory, also known as statistical machine learning, is the mathematical framework studying when algorithms trained on finite samples perform well on new, unseen data.

Statistical machine translation

Statistical machine translation is an approach to machine translation that selects the most probable translation using probability models estimated from large collections of parallel text rather than hand-written rules.

Statistical relational learning

Statistical relational learning (SRL) is a branch of machine learning that combines probabilistic models with logical representations to learn and reason over structured, linked data such as networks and databases.

Statistical shape model

A statistical shape model is a computational method representing the variability of anatomical or object shapes, used to segment structures in medical images via a mean shape and principal modes of variation.

Statistical static timing analysis

Statistical static timing analysis (SSTA) is a method for verifying digital circuit timing that models gate and interconnect delays as probability distributions instead of worst-case numbers.

Statkraft

Statkraft is a Norwegian state-owned renewable energy company and Europe's largest supplier of renewable energy, tracing its origins to the state's purchase of a waterfall in 1895.

Statnett

Statnett is the state-owned transmission system operator of the Norwegian power system, founded in 1992 and responsible for the central grid, balancing supply and demand, and the electricity market.

Stator

The stator is the stationary part of an electric motor or generator, whose windings produce a rotating magnetic field or receive induced voltage from the rotor.

Statpipe

Statpipe is a Norwegian natural gas pipeline system, 892 km long, carrying gas from the Statfjord and Gullfaks fields through the Kårstø plant to Emden, Germany, operational from 1985.

Statsraad Lehmkuhl

Statsraad Lehmkuhl is a Norwegian three-masted steel barque launched in Bremerhaven, Germany in 1914 as a German training ship, now based in Bergen as Norway's largest sailing ship in service.

Statue of B. R. Ambedkar, Hyderabad

The Statue of B. R. Ambedkar in Hyderabad is a 125-foot bronze statue unveiled in April 2023, described as the tallest Ambedkar statue in India.

Status-6 Oceanic Multipurpose System

Status-6 Oceanic Multipurpose System, publicly named Poseidon and given the NATO reporting name Kanyon, is a Russian intercontinental-range, nuclear-powered, nuclear-armed autonomous torpedo launched from special-purpose submarines and announced by Putin in 2018.