All articles starting with P
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Petronell
Petronell (Petronell-Carnuntum), Lower Austria: village on the Danube holding the Roman civil town of Carnuntum, its Hadrianic municipium, auxiliary fort, Heidentor, and the Archaeological Park Carnuntum, a UNESCO Danube Limes site.
Petronella Barker (actress, born 1942)
Petronella Barker, born 1942 in Sittingbourne, Kent, is an English actress (Othello 1965, A Flea in Her Ear 1967) and first wife of Anthony Hopkins, mother of Abigail Hopkins; distinct from the Norwegian actress born 1965.
Petronella Wyatt
Petronella Wyatt is a British journalist, author, and broadcaster, born in London in 1968, who was deputy editor of The Spectator and wrote a memoir of her father, Woodrow Wyatt.
Petronet LNG
Petronet LNG Limited is an Indian company, formed in 1998 by four state-owned oil and gas firms, that imports liquefied natural gas and operates terminals at Dahej and Kochi.
Petronia
Petronia is a genus of Old World sparrows in the family Passeridae, established by Johann Jakob Kaup in 1829 and holding a single species, the rock sparrow.
Petronius
Petronius (died 66 CE), Nero's arbiter elegantiae in Tacitus, is the ascribed author of the Satyricon, a fragmentary Latin Menippean novel featuring Encolpius, Giton, and Trimalchio's banquet.
Petronius's campaign against Meroe
Petronius's campaign against Meroe was a Roman punitive expedition into Nubia led by prefect Gaius Petronius against Queen Amanirenas, ending with the sack of Napata and a peace at Samos.
Petronor refinery
The Petronor refinery is an oil refinery in Muskiz, Biscay, in northern Spain, operated by a Repsol subsidiary and among the largest refineries in Spain.
Petropavl
Petropavl (Qyzylzhar), city in northern Kazakhstan, administrative center of North Kazakhstan Region; founded 1752 as a Russian fortress on the Ishim River, rail junction, population about 222,000.
Petropavlovsk Resolution
The Petropavlovsk Resolution (Петропавловская резолюция), adopted by Kronstadt sailors in February 1921, demanded re-election of the soviets by secret ballot and became the program of the Kronstadt rebellion.
Petropavlovsk-Kamchatsky (Петропавловск-Камчатский)
Petropavlovsk-Kamchatsky (Петропавловск-Камчатский), founded 17 October 1740 by Vitus Bering's Second Kamchatka Expedition, is the administrative center of Kamchatka Krai on Avacha Bay, a Pacific port of about 162,000 people beneath active volcanoes.
Petroperú
Petroperú, formally Petróleos del Perú S.A., is Peru's state-owned petroleum company, created in 1969 by decree during nationalization, which refines and distributes fuels and operates the Norperuano Oil Pipeline.
Petrophysics
Petrophysics is the study of the physical properties of rocks and their fluids, used chiefly to evaluate how much oil or gas a reservoir can store and how easily it flows.
Petrópolis
Petrópolis, the Imperial City (Cidade Imperial), is a mountain municipality in Rio de Janeiro state, Brazil, founded by 1843 decree of Pedro II as a planned summer seat of the empire, home to the Museu Imperial, and prone to deadly landslides.
PetroReconcavo
PetroReconcavo S.A. is a Brazilian independent oil and gas company that revitalizes mature onshore fields in Bahia and Rio Grande do Norte, listed on B3 in 2021.
Petros Adamian
Petros Adamian (Պետրոս Ադամյան) was an Armenian tragedian, poet, and painter who worked in the Ottoman and Russian empires and is regarded as the founder of the Armenian professional theatrical school.
Petros Klampanis
Petros Klampanis (Πέτρος Κλαμπάνης) is a Greek jazz double bassist and composer from Zakynthos who built his career in New York, leading seven albums since his 2011 debut Contextual.
Petros Koumoutsakos
Petros Koumoutsakos is a Greek computational scientist, a Harvard professor who applies computing and AI to fluid flows, elected to the US National Academy of Engineering in 2018.
Petros of Faras
Petros of Faras was a Nubian churchman who served as metropolitan bishop of Pachoras, modern Faras in Sudan, completing the cathedral's reconstruction before his death in 999.
Petros Tzeferacos
Petros Tzeferacos is a plasma physicist at the University of Rochester who directs the Flash Center for Computational Science and won a 2025 PECASE award.
Petrosectomy
Petrosectomy is an operation in otology and skull base surgery that removes part or all of the petrous temporal bone, usually to eradicate chronic infection or cholesteatoma.
Petrositis
Petrositis, or petrous apicitis, is rare suppuration of the petrous apex of the temporal bone from spreading otitis media, causing Gradenigo's syndrome: otorrhea, trigeminal facial pain, and abducens palsy. Treated with broad-spectrum antibiotics, surgery if unresponsive; ICD-10 H70.2, ICD-11 AB11.2.
Petrostate
A petrostate, also called an oil state or petrocracy, is a country whose government income depends deeply on oil and gas exports, with power concentrated in a narrow elite.
PetroTal Corp
PetroTal Corp is a Canadian-incorporated oil and gas company whose flagship asset is the Bretaña heavy oil field in the Marañon Basin of northern Peru, in production since 2018.
Petroterminal de Panama
Petroterminal de Panama, also called PTP, is a Panamanian oil logistics company that owns and operates the 130-kilometer Trans-Panama Pipeline linking the Atlantic and Pacific coasts.
Petrov Affair
The Petrov Affair: the 1954 defection of Soviet spies Vladimir and Evdokia Petrov in Canberra, the Royal Commission on Espionage, the Petrov Papers, and the ALP split that kept the Menzies coalition in power until 1972.
Petrov classification
The Petrov classification, introduced by A. Z. Petrov in 1954 and independently derived by Felix Pirani in 1957, sorts four-dimensional Lorentzian spacetimes into six types based on the Weyl tensor's algebraic structure.
Petrov–Galerkin method
The Petrov–Galerkin method is a finite element technique for solving partial differential equations in which trial and test functions come from different function spaces, improving stability.
Petrovac
OFK Petrovac (Omladinski fudbalski klub Petrovac) is a Montenegrin football club founded in 1969, winner of the 2008–09 Montenegrin Cup, its debut European campaign coming in the 2009–10 Europa League.
Petrović-Njegoš dynasty
The Petrović-Njegoš dynasty (Петровић-Његоши) was the Montenegrin ruling house that governed Montenegro from 1697 to 1918, first as prince-bishops combining church and state, then as princes and kings.