All articles starting with P
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Population protocol
A population protocol is a model of distributed computation, introduced in 2004, in which anonymous identical finite-state agents collectively compute a function through random pairwise interactions.
Population pyramid
Population pyramid: a paired bar chart of a population by age and sex, males left, females right. Also called age-sex pyramid. Types: expansive, stationary, constrictive; shapes record famines, wars, and baby booms.
Population Registration Act, 1950
The Population Registration Act, 1950 (Bevolkingsregistrasiewet) was a South African law that classified every citizen and resident by race, providing the administrative foundation for apartheid until its repeal in 1991.
Population sequencing
Population sequencing is a genomics method that sequences the genomes of many individuals from a population, trading sequencing depth for sample size to catalog genetic variation and support genome-wide association studies.
Population synthesis
Population synthesis is a computational astrophysics method that evolves simulated stellar and binary populations to compact remnants, linking gravitational-wave sources detected by LIGO and Virgo to binary evolution physics.
Population transfer in the Soviet Union
Population transfer in the Soviet Union: state-organized forced deportations of class and ethnic groups, 1919–1953, via OGPU/NKVD special settlements; dekulakization, Korean and wartime ethnic deportations, Baltic Operation Priboi.
Population viability analysis
Population viability analysis (PVA) is a modeling method in ecology and conservation biology that estimates the probability a population will persist or go extinct over a stated time horizon.
Populism
Populism is a thin-centred political ideology pitting "the pure people" against "the corrupt elite" (Mudde 2004), attaching to left or right host ideologies; studies link populist governments to measured declines in democratic quality.
Populism in literature
Populism in literature, or narodnichestvo, is the Russian literary movement of the late 19th century devoted to depicting the real life of the common people.
Populist novel
The populist novel (roman populiste) was a French literary movement founded in 1929 by Léon Lemonnier and André Thérive that portrayed the lives of ordinary people without picturesque embellishment.
Populus
Populus (poplars, aspens, cottonwoods) is a genus of about 61 accepted species of fast-growing dioecious trees in Salicaceae, native to the temperate Northern Hemisphere; major sources of pulp, plywood, and phytoremediation, and the model tree genus for genomics.
Populus × canadensis
Populus × canadensis Moench, 1785, hybrid black poplar or Carolina poplar, is the artificial hybrid of P. deltoides and P. nigra, originating in France about 1750, widely grown for fast timber production.
Populus alba
Populus alba (white poplar, abele, silver-leaf poplar) is a Salicaceae tree native from Central and Southern Europe to Xinjiang and the West Himalaya, with white-woolly leaf undersides, riparian habitat, timber and medicinal uses, and model status in drought stress research.
Populus balsamifera
Populus balsamifera, balsam poplar or tacamahac, is the northernmost American hardwood, a fast-growing Salicaceae floodplain tree from Newfoundland to Alaska, used for pulp and construction and hybridizing with P. trichocarpa.
Populus deltoides
Populus deltoides, eastern cottonwood (also plains cottonwood, necklace poplar), a fast-growing Salicaceae tree of North American floodplains; dioecious, millions of wind- and water-dispersed seeds, three subspecies, IUCN Least Concern.
Populus euphratica
Populus euphratica (胡杨), Euphrates or desert poplar, Salicaceae tree from North Africa to Mongolia; relict salt- and drought-tolerant riparian species, IUCN Least Concern, key to arid-land restoration.
Populus nigra
Populus nigra, the black poplar (Lombardy poplar is its cv. Italica), is a dioecious European riparian tree, a floodplain keystone species, threatened by habitat loss and hybrid introgression; Britain's native subsp. betulifolia has about 7,000 trees.
Populus tomentosa
Populus tomentosa (毛白杨), commonly the Chinese white poplar, is a deciduous tree of the willow family native to China and widely planted in the north for timber and pulp.
Populus tremula
Populus tremula, European or common aspen (Salicaceae), a temperate Eurasian and North African dioecious tree whose flattened leaf petioles make its leaves tremble; wind-dispersed fluffy seeds, wood for pulp and construction, IUCN Least Concern.
Populus tremuloides
Populus tremuloides, quaking or trembling aspen, is North America's most widespread tree, a clonal Salicaceae species regenerating by root suckers, with flattened petioles causing leaf quaking and aspen stands acting as natural firebreaks.
Populus trichocarpa
Populus trichocarpa, black cottonwood or western balsam poplar, is the largest western North American hardwood and the first tree genome sequenced (2006, ~500 Mb, 19 chromosomes), a riparian model tree and biofuel crop.
PopUp Bagels
PopUp Bagels is an American bagel chain founded by Adam Goldberg in Westport, Connecticut, in 2020, known for whole hot bagels sold in packs with rotating schmears under the motto "Grip, Rip and Dip."
Poqo
Poqo, Xhosa for "pure" or "alone," was the armed underground formation of South Africa's Pan Africanist Congress, active mainly in the early 1960s and reconstituted in exile as APLA in 1968.
Poqomam kingdom
The Poqomam kingdom was a Late Postclassic Maya kingdom (1250–1524 CE) of the Guatemalan Highlands, with its fortified capital at Chinautla Viejo near present-day Guatemala City.
Poque
Poque: French vying card game of the 17th-18th centuries, the French form of German Poch/Pochspiel, played with five-card hands ranked quartet, full, triplet, pair; ancestor of poker and source of its name.
Por la Libre
Por la libre (Dust to Dust), 2000 Mexican coming-of-age road comedy-drama by Juan Carlos de Llaca (Altavista Films); cousins Rodrigo and Rocco take their Spanish grandfather's ashes to Acapulco; Ariel winner, Netflix.
Por Thozhil (போர் தொழில்)
Por Thozhil (போர் தொழில்), The Art of War, is a 2023 Tamil crime thriller directed by Vignesh Raja, starring Ashok Selvan and R. Sarathkumar as rookie and veteran cops hunting a serial killer; a Rs. 7.75 crore blockbuster streaming on Sony LIV.
Por una Cabeza
Por una Cabeza ("By a Head") is a 1935 Argentine tango by Carlos Gardel with lyrics by Alfredo Le Pera, written for the film Tango Bar; its horse-racing gambling metaphor and Hollywood uses in Scent of a Woman and Schindler's List made it tango's most recognizable melody.
Por(d)oselene/Nasos (settlement)
Por(d)oselene/Nasos (Πορδοσελήνη, Νεσος) was an ancient Aeolian island polis between Lesbos and Asia Minor, in the Hecatonnesi; attested in Athenian tribute lists of 422/1 BCE, minting 5th–4th century BCE coins, likely on Alibey Adası near Ayvalık.
Porak
Porak (Bamni; Azeri Akharbakhar) is a 3,029 m volcanic field on the Vardenis highland straddling the Armenia-Azerbaijan border, with Holocene eruptions dated about 4510 BCE and 778 BCE.