Technology and the built world

Puget Sound refinery

The Puget Sound Refinery is an oil refinery in Anacortes, Washington, owned by HF Sinclair since 2021 and operating since 1957, with a capacity of 149,000 barrels per day.

Puguang Gas Field (普光气田) is a giant high-sulfur natural gas field in Dazhou, northeastern Sichuan Basin, China, discovered in 2003 and operated by Sinopec, with over 9 trillion cubic feet of proven reserves.

Puig (company)

Puig, formally Puig Brands, S.A., is a Spanish family-owned premium beauty company in Barcelona, founded in 1914, whose brands include Rabanne, Carolina Herrera, and Charlotte Tilbury.

Pukchang power station

Pukchang power station is a coal-fired power station in South Pyongan Province, North Korea, and the country's largest power plant, with an installed capacity of 1,600 MW.

Pukchang Thermal Plant Complex

Pukchang Thermal Plant Complex, also called the Pukchang power station, is North Korea's largest power plant, a coal-fired station of at least 1,600 MW in South Pyongan Province.

Pulaski Skyway

The Pulaski Skyway, officially the General Pulaski Skyway, is a 3.5-mile elevated highway in New Jersey carrying U.S. Route 1&9 between Jersey City and Newark, opened in 1932.

Pulau Sakra power station

Pulau Sakra power station is a power generation complex in the Sakra sector of Jurong Island, Singapore, named for one of the islands merged to form Jurong Island.

Pulau Seraya power station

Pulau Seraya power station is a power station on Pulau Seraya, now part of Jurong Island in Singapore. Opened in 1988, it was Singapore's first offshore power station.

Sep 20, 2026

Pulickel M. Ajayan

Pulickel M. Ajayan is a materials scientist and professor at Rice University who worked in the NEC group where carbon nanotubes were discovered and leads battery recycling research.

Pulkovo Airport

Pulkovo Airport (Пулково, LED/ULLI) is Saint Petersburg's international airport, founded 24 June 1932, with two runways, 20.9 million annual passengers, and 107 destinations in summer 2025.

Pull-off force

Pull-off force is the maximum tensile force required to separate two adhering bodies, such as an AFM tip and a surface or a coating from its substrate.

Pull-out test

A pull-out test measures the force required to pull an embedded metal insert with attached concrete out of a structure, estimating in-place compressive strength under ASTM C900.

Pull-up resistor

A pull-up resistor is a resistor connected between a digital signal line and the positive supply voltage that holds the line high when nothing drives it.

Pulley

A pulley is a simple machine consisting of a grooved wheel over which a rope, cable, or belt passes, changing the direction of force; combined pulleys multiply it.

Pullman Company

The Pullman Company, founded as the Pullman Palace Car Company by George Pullman in 1867, built luxurious sleeping cars and operated them on railroads across North America.

Pullman Strike

The Pullman Strike, or Pullman Railroad Strike, was an 1894 nationwide railroad strike and boycott in the United States led by Eugene Debs' American Railway Union.

Pullout test

A pullout test measures the force required to pull an embedded metal insert and a fragment of concrete from a concrete member, estimating in-place compressive strength.

Pulp (paper)

Pulp, also known as paper pulp or cellulose pulp, is a watery suspension of plant fibers and the primary raw material for making paper and paperboard.

PULS (rocket launcher)

PULS, short for Precise and Universal Launching System, is an Elbit Systems multiple rocket launcher with two interchangeable pods firing rockets and missiles up to 300 km.

Pulse Clean Energy

Pulse Clean Energy, formerly Green Frog Power Ltd, is a British company that owns and operates grid-scale battery storage, rebranded in 2021 after IMCO's full acquisition.

Pulse compression

Pulse compression is a radar signal processing technique that modulates each transmitted pulse in frequency or phase, letting a long pulse achieve the range resolution of a much shorter one.

Pulse detonation engine

A pulse detonation engine is an experimental jet engine that generates thrust from repeated detonation waves, supersonic combustion fronts that burn fuel in abrupt pressure rises.

Pulse transformer

A pulse transformer is a transformer designed to transfer rapid electrical pulses between circuits while providing galvanic isolation, used in gate drives, radar magnetrons, and Ethernet data links.

Pulse welding

Pulse welding is a family of arc and laser welding techniques that delivers energy in repeated high and low cycles, reducing distortion and improving weld quality.

Pulse-amplitude modulation

Pulse-amplitude modulation, or PAM, is a form of pulse modulation in which each pulse's amplitude varies with the sampled message signal, now widely used digitally as PAM4.

Pulse-coupled neural network

A pulse-coupled neural network (PCNN) is a single-layer network of integrate-and-fire neurons, one per image pixel, that converts images into pulse outputs without training and is used in image segmentation and fusion.

Pulse-Doppler radar

Pulse-Doppler radar is a radar technique that transmits pulses and measures the Doppler shift of echoes to determine target velocity, underpinning weather radar networks like the WSR-88D.

Pulse-frequency modulation

Pulse-frequency modulation (PFM) is an encoding method that represents a signal's magnitude as the repetition rate of identical pulses, used in neuromorphic computing and switching regulators.

Pulse-position modulation

Pulse-position modulation (PPM) is a digital modulation method that encodes information in a pulse's position within a time frame, used in deep-space and lunar optical links.