All articles starting with P
28,818 articles
Power Broker
Power broker: a person wielding indirect political influence through networks and deals rather than elected office; term coined 1961 by Theodore H. White, popularized by Caro's 1974 Robert Moses biography.
Power capping
Power capping is the practice of limiting the electrical power a computer component, server, or group of servers may draw, enforced from the processor up to the facility level, as with Intel RAPL.
Power chord
Power chord (fifth chord, open-fifth chord): a root-plus-perfect-fifth guitar sonority, 7 semitones apart, with no third, so neither major nor minor; distortion-friendly, movable shape, central to rock and metal since Link Wray's 1957 "Rumble".
Power coefficient of reactivity
The power coefficient of reactivity (PCR) is the change in a nuclear reactor's reactivity per percent change in power, summing the fuel temperature, moderator temperature, and void coefficients.
Power Construction Corporation of China
Power Construction Corporation of China (POWERCHINA, 中国电力建设集团有限公司) is a wholly State-owned group founded in 2011 that builds hydropower projects including the Three Gorges and Baihetan stations.
Power control (wireless networks)
Power control in wireless networks is the family of algorithms that adjust each transmitter's power so links meet signal-quality targets while limiting interference and saving battery life, standardized in LTE and 5G.
Power Court Stadium
Power Court Stadium is a planned 25,000-seat football stadium in Luton, England, approved in December 2024 as the new home of Luton Town Football Club, targeted to open for the 2028/29 season.
Power cycling test
A power cycling test (PCT) is an accelerated reliability test that repeatedly heats a power semiconductor device to expose fatigue in bond wires and solder.
Power delivery network
A power delivery network, also called a power distribution network, is the complete electrical path carrying current from voltage regulators through boards and packages to an integrated circuit's transistors.
Power dissipation index
The power dissipation index (PDI) is a measure of tropical cyclone destructive potential, summing maximum sustained wind speed cubed, introduced by MIT's Kerry Emanuel in 2005.
Power distance
Power distance, measured by Hofstede's Power Distance Index (PDI), is a national-culture dimension on hierarchy and unequal power; GLOBE's Power Distance is a related but distinct measure, debated in cross-cultural research.
Power distribution unit
A power distribution unit (PDU) splits one electrical input feed across multiple outlets, most often as a rack PDU that supplies servers and storage in data center racks.
Power dividers and directional couplers
Power dividers and directional couplers are passive microwave components used to split or sample radio-frequency power along transmission lines, common in transmitters, antenna arrays, and network analyzers.
Power Doppler ultrasound
Power Doppler ultrasound is a Doppler imaging mode that maps integrated signal power to brightness rather than velocity, detecting slow flow and tissue perfusion with little angle dependence and no aliasing.
Power Dot
Powerdot is a Portuguese electric-vehicle charging point operator founded in 2018 in Lisbon by Luís Santiago Pinto and José Sacadura, with over 11,000 charging points across six European markets.
Power Echols
Power Echols is an American football linebacker from Charlotte, North Carolina, who played at North Carolina and signed with the Chicago Bears as an undrafted free agent in 2025.
Power electronics
Power electronics is the branch of electrical engineering that converts and controls electric power using semiconductor switches, spanning watts to megawatts in applications like solar inverters and electric vehicles.
Power engineering
Power engineering, also called power systems engineering, is the branch of electrical engineering concerned with generating, transmitting, distributing, and using electric energy safely and reliably.
Power factor
Power factor is the ratio of real power to apparent power in an alternating-current circuit, equal to the cosine of the phase angle between voltage and current.
Power factor correction
Power factor correction (PFC) is the set of techniques used to raise an electrical load's power factor toward unity, most often with capacitor banks or active boost converters.
Power flow calculation
A power flow calculation, also called load flow, is a numerical method that computes the steady-state operating point of an electrical grid, giving bus voltages and line power flows.
Power for All
Power for All is a global campaign and nonprofit founded in 2014 to end energy poverty by accelerating decentralized renewable energy like mini-grids and rooftop solar in developing countries.
Power gating
Power gating is a circuit technique that reduces leakage power of inactive logic by disconnecting it from the supply through sleep transistors, widely used in low-power chip design.
Power Girl
Power Girl (Kara Zor-L, Karen Starr, Paige Stetler) is DC Comics' Earth-Two counterpart of Supergirl, debuting in All-Star Comics #58 (1976); known for her revised origins, Symbioship upbringing, and solo series since 1988.
Power Glove
The Power Glove was a motion-sensing controller for the Nintendo Entertainment System, released by Mattel in October 1989 and remembered as the first mass-marketed gesture-based game controller.
Power Grid Corporation of India (पावर ग्रिड कॉर्पोरेशन ऑफ़ इंडिया लिमिटेड)
Power Grid Corporation of India Limited, known as POWERGRID, is India's largest state-owned power transmission utility, a Government of India Maharatna enterprise incorporated in 1989.
Power International Holding (Qatari conglomerate)
Power International Holding is a diversified Qatari family conglomerate founded in 2011 by Syrian-born brothers Moutaz and Ramez Al-Khayyat, with over 400 companies in 25 countries.
Power inverter
A power inverter, also known as a voltage inverter or DC-to-AC converter, is an electronic converter that changes direct current into alternating current at a chosen voltage and frequency.
Power iteration
Power iteration, also called the power method or Von Mises iteration, is a numerical linear algebra algorithm that finds a square matrix's dominant eigenvalue and a corresponding eigenvector.
Power law
A power law is a mathematical relationship in which one quantity is proportional to a fixed power of another, describing city sizes, earthquake magnitudes, wealth, and word frequencies.