All articles starting with P
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Pearse A. Keane
Pearse A. Keane is an Irish ophthalmologist and medical AI researcher, Professor at UCL and Moorfields Eye Hospital, known for pioneering AI eye diagnosis and founding oculomics.
Pearse Stadium
Pearse Stadium (Stáid an Phiarsaigh), Salthill, Galway: GAA county ground of Galway, opened 1957, capacity about 26,197, host of Connacht finals, 2006 International Rules, and Galway United matches.
Pearson (TV series)
Pearson is a 2019 USA Network political drama, a Suits spinoff starring Gina Torres as disbarred lawyer Jessica Pearson, fixer to Chicago's mayor; ten episodes, canceled after one season, now on Peacock.
Pearson correlation coefficient
The Pearson correlation coefficient, or Pearson's r, measures the linear relationship between two variables, ranging from −1 to +1, and is the most common correlation method in statistics.
Pearson correlation test
The Pearson correlation test is a statistical test of whether the population correlation between two continuous variables differs from zero, exact under bivariate normality and otherwise approximate.
Pearson Education
Pearson Education Limited, subsidiary of Pearson plc (FTSE: PSON.L), publishes textbooks and digital courseware (MyLab, Revel, Pearson+), runs Edexcel/BTEC qualifications, Pearson VUE, and PTE, and holds large UK and US testing contracts; subject to Ofqual penalties and a 2026 rebuke.
Pearson plc
Pearson plc, also known as Pearson Group, is a British education company founded in 1844 as a building firm and listed in London and New York.
Pearson syndrome
Pearson syndrome (Pearson marrow-pancreas syndrome) is a rare infantile mitochondrial disorder caused by single large-scale mtDNA deletions, causing sideroblastic anemia, pancreatic insufficiency, lactic acidosis, and often evolution to Kearns-Sayre syndrome.
Pearson's chi-squared test
Pearson's chi-squared test, also known as the Pearson chi square, is a significance test for categorical data comparing observed and expected counts, introduced by Karl Pearson in 1900.
Peary (lunar crater)
Peary, a large lunar impact crater near the Moon's north pole (about 88.6°N, 33°E), named for explorer Robert Peary. Its rim has near-permanent sunlight, its interior permanent shadow, making it a polar volatiles target.
Peary Chand Mitra
Peary Chand Mitra (1814–1883) was a Bengali writer, librarian, and social reformer of Calcutta whose Alaler Gharer Dulal is counted the first novel in the Bengali language.
Peary Land
Peary Land: uninhabited ~50,000 km² peninsula in northeastern Greenland, named for Robert E. Peary; mountains to 1,950 m, ice-free in summer, and home to Kap Morris Jesup and Inuit Qeqertaat, the northernmost land on Earth.
Peasant
Peasant: a small-scale household agricultural producer; from Latin pagus, root shared with "pagan". Medieval Europe's majority class, often in serfdom; central category of agrarian history.
Peasant Affairs Presence
The Peasant Affairs Presence (Присутствие по крестьянским делам) was a collegial body of local administration in the Russian Empire, created in 1861 to implement the peasant reform and supervise peasant self-government.
Peasant Army of Fergana
The Peasant Army of Fergana, also known as the Russian Peasant Army, was a militia of about 20,000 Russian peasant settlers formed in 1919, commanded by Konstantin Monstrov.
Peasant Children
Peasant Children (Крестьянские дети) is a small lyric-epic narrative poem by Nikolai Nekrasov, written in 1861, that portrays village childhood through a hunter-poet's chance meeting with peasant children.
Peasant Land Bank
The Peasant Land Bank (Крестьянский поземельный банк) was a state bank of the Russian Empire, founded in 1882 to give peasants long-term loans for buying land.
Peasant movement of 1905–1906
The peasant movement of 1905–1906 (Крестьянское движение 1905–1906 годов) was a wave of disorders, estate burnings, and land seizures by Russian peasants against landowners, peaking in late 1905.
Peasant revolt in Mount Lebanon (1858-1861)
The peasant revolt in Mount Lebanon, known as the Kisrawan uprising, was a rebellion of Maronite peasants against the Khazin landlords, led by Tanyus Shahin from 1858 to 1861.
Peasants' Revolt
The Peasants' Revolt, also known as Wat Tyler's Rebellion or the Great Revolt, was an unsuccessful 1381 uprising in England against poll taxes, sparked in Essex and collapsing after Wat Tyler's killing.
Pease pudding
Pease pudding, also called pease pottage or pease porridge, is a British savory dish of boiled yellow split peas pureed thick, served with ham or pork and now a North East England staple in ham-and-pease-pudding stotties.
Peat
Peat: partially decomposed plant matter formed in waterlogged bogs and fens, accumulating 0.5–1 mm yearly. Covers ~3% of land but stores a third of Earth's carbon; extracted for fuel and horticulture, driving major emissions when drained.
Peat subsidence
Peat subsidence is the lowering of the land surface when drained peat soils shrink, consolidate, compact, and oxidize, typically at rates of millimeters to centimeters per year.
Peat swamp forest
Peat swamp forest: tropical forest on waterlogged peat, best developed in Southeast Asia (Borneo, Sumatra, Peninsular Malaysia). Stores ~105 GtC in tropical peat; drained and burned for oil palm and acacia plantations, emitting ~692 Tg CO2e yearly; restored by canal blocking.
Peatland
Peatland: waterlogged wetland ecosystem (bogs, fens, mires, swamps) with surface peat from partly decomposed plants; covers ~3% of land, stores ~20% of soil carbon (238–612 Gt C), and emits ~5% of GHGs when drained.
Peatland drainage impact
Peatland drainage impact covers the environmental consequences of draining peatlands: drained peat becomes a carbon source, causing emissions, subsidence of 1 to 8 meters, and water degradation.
Peatland restoration
Peatland restoration is the practice of returning drained or degraded peatlands to health, mainly by rewetting them so they again store carbon, support peat-forming vegetation, and cut greenhouse gas emissions.
Peatland rewetting
Peatland rewetting is the cessation of drainage and restoration of high groundwater levels in degraded peatlands, typically by ditch blocking, to stop carbon dioxide emissions from dried-out peat soils.
Peaucellier–Lipkin linkage
The Peaucellier–Lipkin linkage, also called the Peaucellier inversor, is an eight-bar mechanism that converts rotary motion into exact straight-line motion, invented in 1864 as the first planar linkage to trace a perfect line.
PEB (building energy performance requirement)
PEB, in Dutch EPB (Energy Performance and Indoor Climate), is the family of building energy performance requirements imposed in Belgium's three regions on new construction and renovation.