Technology and the built world

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Statement (computer science)

In computer science, a statement, also called a program statement, is a fragment of a program executed for its effect rather than to produce a value.

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Staten Island Ferry

The Staten Island Ferry is a free passenger ferry between Staten Island and Lower Manhattan, run by New York City since 1905, carrying 16 million riders a year.

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Staten Island Railway

The Staten Island Railway, also known as Staten Island Rapid Transit, is the only rapid transit line on Staten Island, running 24/7 between St. George and Tottenville.

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Statens vegvesen

Statens vegvesen (Norwegian Public Roads Administration, NPRA) is the Norwegian government agency responsible for national and European roads, traffic safety, and driver and vehicle licensing.

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Statera Energy

Statera Energy is a London-headquartered UK company developing grid-scale battery storage, flexible generation, pumped hydro, and green hydrogen, founded in 2015 and owned by EQT Infrastructure since 2024.

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Statfjord oil field

Statfjord is an oil and gas field in the northern North Sea, straddling the Norway–UK sector border, discovered by Mobil in 1974 and producing since November 1979.

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Static application security testing

Static application security testing (SAST) is a white-box testing method that analyzes source code, bytecode, or binaries without executing them to find security vulnerabilities early in development.

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Static code analysis

Static code analysis examines a program's source code without executing it, to detect bugs, security vulnerabilities, and quality issues, ranging from linters to formal verifiers that prove properties.

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Static induction thyristor

The static induction thyristor (SIThy, also written SITH, Japanese 静電誘導サイリスタ) is a four-layer power semiconductor switch with gate-controlled turn-off, invented by Jun-ichi Nishizawa in 1975 and used in pulsed power and accelerator supplies.

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Static induction transistor

The static induction transistor (SIT) is a voltage-controlled power field-effect transistor invented by Jun-ichi Nishizawa in 1950, known for high-power, high-frequency operation and triode-like behavior.

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Static load test

A static load test is a structural engineering test that applies a gradually increasing, non-varying load to a foundation element to measure its deformation, capacity, and stiffness.

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Static program analysis

Static program analysis is the automatic analysis of program code without execution, proving properties true for all possible executions; its techniques include data flow analysis, abstract interpretation, and symbolic execution.

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Static random-access memory

Static random-access memory (SRAM) is a fast, volatile semiconductor memory that holds each bit in a latching circuit and needs no refresh, used mainly as cache.

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Static routing

Static routing is a method of configuring IP routers in which an administrator manually defines the next hop for a destination instead of using a dynamic routing protocol.

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Static single assignment form

Static single assignment form (SSA) is a compiler intermediate representation in which every variable is assigned exactly once, with phi functions handling control flow merges.

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Static site generation

Static site generation (SSG) is a web development technique where a site's HTML is built in advance, then served from a CDN to every visitor.

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Static synchronous compensator

A static synchronous compensator, also written static synchronous condenser, is a shunt FACTS device that supplies or absorbs reactive power on an AC grid to regulate voltage.

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Static synchronous series compensator

The static synchronous series compensator (SSSC) is a converter-based FACTS device that injects a controllable voltage in quadrature with line current, controlling power flow like a series capacitor or reactor.

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Static timing analysis

Static timing analysis (STA) validates the timing of a digital integrated circuit by checking all constrained signal paths for violations without simulating input vectors, making it faster and more thorough than dynamic simulation.

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Static transfer switch

A static transfer switch is a solid-state device that switches critical loads between two AC power sources within milliseconds, used mainly in data centers and hospitals.

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Static typing

Static typing is the property of a programming language whose type checker runs before execution, catching type errors in Java, C, and Haskell before the program runs.

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Static VAR compensator

A static VAR compensator (SVC) is a shunt-connected power-electronic device regulating voltage on AC networks through thyristor-controlled reactive compensation, a standard FACTS controller first applied commercially in 1964.

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Static variable

A static variable is a variable whose storage is allocated for a program's entire execution, so its value persists between uses, as in C-family languages' static keyword.

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Static web page

A static web page is a set of HTML, CSS, and JavaScript files served to every visitor exactly as stored, with no server-side code varying the content.

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Statically determinate structure

A statically determinate structure is a structure whose support reactions and internal forces can be calculated from the equations of static equilibrium alone, without information about material stiffness or deformation.

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Station blackout

A station blackout (SBO) is the complete loss of AC electrical power at a nuclear power plant, caused when both offsite grid power and emergency diesel generators fail.

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Station code

A station code is a short, usually alphabetic identifier for a railway or transit station in ticketing, reservation, or operating systems, independent of the station's name.

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Station post insulator

A station post insulator is a rigid insulator used in high-voltage substations to support bus bars, conductors, and disconnect switches, made in porcelain, composite, and toughened glass.

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Station service transformer

A station service transformer (SST), also called a station auxiliary transformer, supplies a power plant's own auxiliary loads from the high-voltage transmission network, independent of generator status.

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Station wagon

A station wagon, also called an estate car, is a passenger car body style with a roof extending over a shared passenger and cargo compartment.