edgepedia

Technology and the built world

61,984 articles

Pattern matching

Pattern matching is a programming-language construct that tests a value against a described shape, called a pattern, binding variables to its parts; it generalizes the switch statement.

Pattern recognition

Pattern recognition, also called statistical pattern recognition, is the science of learning to distinguish patterns of interest from their background and classifying them, underpinning machine learning.

Pattern welding

Pattern welding is a bladesmithing technique in which twisted rods of iron and steel are forge-welded together and etched to show a decorative pattern, used since Celtic times.

Patterned sapphire substrate

A patterned sapphire substrate (PSS) is a sapphire wafer whose surface is patterned with micro- or nanoscale structures that reduce defects and enhance light extraction in GaN-based LEDs.

Patterson-UTI Energy (company)

Patterson-UTI Energy is a Houston, Texas-based provider of land-based contract drilling and completion services to oil and gas companies, formed in 2001 and traded on Nasdaq as PTEN.

Pattie Maes

Pattie Maes is a computer scientist at the MIT Media Lab who pioneered software agents, co-founded the personalization company Firefly, and leads the Fluid Interfaces group.

Pattugliatori Polivalenti d'Altura

The Pattugliatori Polivalenti d'Altura, also known as the Paolo Thaon di Revel class, are seven modular multipurpose offshore patrol vessels built by Fincantieri for the Italian Navy.

Paul A. Beck

Paul A. Beck (1908–1997) was a Hungarian-born American physical metallurgist and professor of metallurgy at the University of Illinois, known for research on recrystallization textures and transition-metal alloy phases.

Paul A. Libby

Paul A. Libby (1921–2021) was an American aerospace engineer and founding faculty member at UC San Diego, known for the Bray–Moss–Libby model of premixed turbulent flames.

Paul Allen

Paul Gardner Allen (1953–2018) was an American businessman and philanthropist who co-founded Microsoft in 1975 and later founded the Allen Institutes for science and AI research in Seattle.

Paul B. Weisz

Paul B. Weisz (1919–2012) was a Czechoslovakia-born American engineer at Mobil whose zeolite catalyst work founded shape-selective catalysis, earning National Academy of Engineering election in 1977.

Paul Bevilaqua

Paul Bevilaqua is an American aeronautical engineer, formerly of the Lockheed Martin Skunk Works, who invented the shaft-driven lift fan that lets the F-35B fly supersonic and land vertically, earning the 2001 Collier Trophy.

Paul C. Jennings

Paul C. Jennings is an American earthquake engineer, Caltech professor emeritus, elected to the National Academy of Engineering in 1977, Caltech's provost twice, and a recipient of ASCE's Newmark Medal.

Paul C. Paris

Paul C. Paris (1930–2017) was an American engineer who formulated the Paris law, the power-law equation used to predict fatigue crack growth in aircraft and vehicles.

Paul Christiano

Paul Christiano is an American AI safety researcher who pioneered reinforcement learning from human feedback at OpenAI and founded the Alignment Research Center, a Berkeley nonprofit.

Paul D. Clayton

Paul D. Clayton is an American medical informatics researcher who built computerized decision support into hospital care at Utah and Columbia, and served as AMIA president.

Paul Daniel Dapkus

Paul Daniel Dapkus is an American electrical engineer and USC professor elected to the National Academy of Engineering in 2004 for making MOCVD the dominant process for laser diodes and LEDs.

Paul de Casteljau

Paul de Faget de Casteljau (1930–2022) was a French mathematician who, working at Citroën from 1958, discovered the de Casteljau algorithm used to evaluate Bézier curves.

Paul Debevec

Paul Debevec is an American computer graphics researcher who developed image-based lighting and the Light Stage face-capture devices, winning a Scientific and Engineering Academy Award in 2010.

Paul Dyer Merica

Paul Dyer Merica (1889–1957) was an American physical metallurgist who explained why aluminum alloys harden spontaneously after heat treatment, and who rose from refinery metallurgist to president of International Nickel.

Paul E. Dimotakis

Paul E. Dimotakis is an experimental fluid dynamicist at Caltech, elected to the National Academy of Engineering in 2016 for work on turbulence, mixing, and jet propulsion.

Paul E. Gray

Paul E. Gray (1932–2017) was an American electrical engineer who spent his career at MIT, serving as its fourteenth president from 1980 to 1990 and later chairing the MIT Corporation.

Paul E. Krajewski

Paul E. Krajewski is an American materials scientist at General Motors who developed lightweight automotive materials and was elected to the National Academy of Engineering in 2020.

Paul E. Queneau

Paul E. Queneau was an American extractive metallurgist who pioneered oxygen smelting to cut pollution, helped invent the QSL lead process, and spent 35 years at International Nickel.

Paul E. Rubbert

Paul E. Rubbert is a retired Boeing aerospace engineer and pioneer of computational fluid dynamics, who led Boeing's Aerodynamics Research Unit and was elected to the National Academy of Engineering.

Paul E. Waggoner

Paul E. Waggoner was an American plant pathologist and climatologist at the Connecticut Agricultural Experiment Station, known for EPIDEM, the first computer simulation of plant diseases.

Paul Edward Waggoner

Paul Edward Waggoner (1923–2022) was an American plant pathologist and climatologist at the Connecticut Agricultural Experiment Station, known for EPIDEM, the first computer simulation of plant diseases.

Paul England (computer scientist)

Paul England is a computer scientist and hardware-security engineer who spent 27 years at Microsoft and was elected to the National Academy of Engineering in 2019.

Paul F. Chenea

Paul F. Chenea (1918–1996) was an American mechanical engineer and Purdue University vice president who led General Motors research from 1969 to 1982, specializing in continuum mechanics.

Paul F. McKenzie

Paul F. McKenzie is a chemical engineer and biopharmaceutical manufacturing executive, elected to the National Academy of Engineering in 2020, who became CEO of CSL Limited in March 2023.