Technology and the built world

Singing voice synthesis

Singing voice synthesis, also known as SVS, is the task of generating sung vocals from a music score, with input of lyrics, note pitch, and note duration.

Single Day-Ahead Coupling is the pan-European day-ahead electricity market coupling that allocates cross-border transmission capacity via implicit auctions, run by NEMOs and TSOs under the CACM framework.

Single European Sky

The Single European Sky (SES) is a European Union initiative, launched in 2004, to replace fragmented national airspaces with a harmonized, performance-driven air traffic management system.

Single European Sky ATM Research

Single European Sky ATM Research (SESAR) is the European Union's program for modernizing air traffic management, launched as the technological pillar of the Single European Sky.

Single instruction, multiple data

Single instruction, multiple data (SIMD) is a computer architecture class, one of the four categories of Flynn's 1966 taxonomy, in which one instruction operates on many data elements simultaneously.

Single mixed refrigerant process

The single mixed refrigerant process is an LNG liquefaction cycle in which one closed loop of a mixed refrigerant cools natural gas, best known as Black & Veatch's PRICO process.

Single pivot suspension

Single pivot suspension is a bicycle rear suspension design in which a swingarm rotates about a single pivot on the main frame, with a shock absorber controlling its motion.

Single point mooring

A single point mooring, or SPM, is an offshore buoy or fixed tower where tankers moor and load or unload liquid cargo, swinging freely with wind and current.

Single sign-on

Single sign-on (SSO) is an authentication arrangement where a user authenticates once to an identity provider and then obtains services from multiple applications without presenting credentials again to each one.

Oct 26, 2026

Single source of truth

Single source of truth (SSOT): a data management principle naming one authoritative system per business fact, with all other systems holding copies. Covers implementation patterns, MDM relationship, risks, and data mesh alternatives.

Single system image

Single system image (SSI) is a computing paradigm that makes a cluster of machines appear to users and applications as one large, unified computer, hiding the underlying distributed resources.

Single UNIX Specification

The Single UNIX Specification, published by The Open Group since 1994, defines the interfaces and utilities an operating system needs for UNIX certification and trademark use.

Single-atom electron spin qubit in silicon

A quantum bit formed from the spin of a single electron bound to an implanted phosphorus atom in silicon, first demonstrated at the University of New South Wales in 2012.

Single-atom nanozymes

Single-atom nanozymes (SAzymes) are artificial enzyme mimics in which isolated metal atoms dispersed on a solid support act as well-defined active sites, combining nanozyme catalysis with single-atom catalyst precision.

Single-atom Ru catalysts on nitrogen-doped carbon for acidic oxygen evolution

Single-atom Ru catalysts on nitrogen-doped carbon anchor isolated ruthenium atoms in four nitrogen sites on carbon, driving acidic oxygen evolution for proton exchange membrane water electrolyzers.

Single-atom transistor

A single-atom transistor is a transistor whose active region is a single dopant atom. The first was built with one phosphorus atom in silicon at UNSW in 2012.

Single-board computer

A single-board computer (SBC) is a complete computer built on a single printed circuit board, integrating processor, memory, and I/O, ranging from hobbyist boards like the Raspberry Pi to industrial embedded controllers.

Single-carrier frequency-domain equalization

Single-carrier frequency-domain equalization (SC-FDE) is a technique that sends data as single-carrier blocks and equalizes them with an FFT, avoiding OFDM's high peak-to-average power ratio.

Single-crystal cathode material

A single-crystal cathode material is a lithium-ion battery cathode in which each active particle is one continuous crystal, avoiding grain-boundary cracking for longer cycle life and stability.

Single-crystal lithium iron phosphate cathodes

Single-crystal lithium iron phosphate (LiFePO₄, LFP) cathodes are lithium-ion battery cathode materials in which each particle is one continuous olivine crystal, grown as nanoscale plates or rods.

Single-crystal superalloy

A single-crystal superalloy is a nickel-based high-temperature alloy cast so the entire component, typically a gas turbine blade, forms one crystal with no grain boundaries for exceptional creep strength.

Single-cylinder engine

A single-cylinder engine is an internal combustion engine with one cylinder and one piston, nicknamed the "thumper" and standard on dirt bikes and small dual-sport motorcycles.

Single-engine pusher aircraft

A single-engine pusher aircraft has its engine and propeller at the rear, pushing rather than pulling, a layout common in early aircraft and today's ultralights and UAVs.

Single-event upset

A single-event upset is a soft error in which one energetic particle, such as a cosmic ray, flips a bit in semiconductor memory without damaging the chip.

Single-family detached home

A single-family detached home, also called a detached house, is a free-standing residence standing alone on its own lot, the dominant housing type in the United States.

Single-frequency network

A single-frequency network (SFN) is a broadcast network in which several transmitters cover an area on one frequency channel, sending the same synchronized signal so receivers treat overlaps as echoes.

Single-ion conducting polymer electrolyte

Single-ion conducting polymer electrolytes (SICPEs) are solid polymer electrolytes in which anions are immobilized, giving a cation transference number near 1, pursued mainly for solid-state lithium-metal batteries.

Single-lens reflex camera

A single-lens reflex (SLR) camera is a camera that lets the photographer view, focus, and expose through one lens using a movable mirror, eliminating parallax error.

Single-level cell

Single-level cell (SLC) is a NAND flash memory technology that stores one bit per cell, delivering the highest endurance and performance among NAND types at the highest cost per bit.