All articles starting with P
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Protected-permitted left turn
A protected-permitted left turn (PPLT) is a traffic signal phasing mode where left-turning drivers get a protected green-arrow phase plus a permissive interval requiring them to yield.
Protecting Americans from Foreign Adversary Controlled Applications Act
PAFACA, a 2024 U.S. federal law in Division H of Public Law 118-50, bans distribution and hosting of foreign adversary controlled apps such as TikTok unless divested, upheld by the Supreme Court in 2025.
Protecting group
A protecting group is a group temporarily attached to a reactive functional group in a molecule, used in multistep organic synthesis to control where reactions occur.
Protecting Jared
Protecting Jared is a Netflix action-comedy feature (2027 expected), formerly Untitled Andy Samberg & Jason Momoa Comedy Project, directed by Ruben Fleischer; Momoa plays guard William Ikaika protecting billionaire Jared Bachman (Samberg), filmed in Honolulu Feb–Apr 2026.
Protecting power
A protecting power is a neutral State designated by one side of a conflict and approved by the other to perform humanitarian duties under the Geneva Conventions of 1949.
Protection of Diplomats Convention
The Protection of Diplomats Convention, formally the 1973 Convention on Crimes against Internationally Protected Persons, is a UN anti-terrorism treaty in force 20 February 1977 with 180 parties, requiring criminalization and prosecution or extradition of attacks on diplomats and other protected persons.
Protection of Personal Information Act (South Africa)
The Protection of Personal Information Act, known as POPIA, is South Africa's omnibus data protection law, signed in 2013 and fully in force since 1 July 2021.
Protection of Women from Domestic Violence Act, 2005
Protection of Women from Domestic Violence Act, 2005 (PWDVA), India's civil domestic violence law, Act 43 of 2005, in force 26 October 2006. Covers physical, emotional, verbal, sexual, and economic abuse; grants protection, residence, custody, monetary relief, and compensation orders; enforced by district Protection Officers.
Protection ring
A protection ring, also known as a hierarchical protection domain, is a privilege level in a computer's architecture, with inner rings accessing more resources than outer rings.
Protectionism
Protectionism, also known as economic protectionism or trade protection, is trade policy that shields domestic producers from foreign competition using tariffs, quotas, subsidies, and other barriers.
Protective belt
The protective belt is Imre Lakatos's term, from his 1970 methodology of scientific research programs, for the auxiliary hypotheses that absorb empirical tests on behalf of a research program's hard core.
Protective Clothing
Protective clothing, also called chemical protective clothing or CPC, is PPE garments shielding wearers from chemical, biological, heat, and mechanical hazards, classified by standards such as ANSI/AAMI PB70, EN 14126, and ISO Types 1–6.
Protective Devices
Protective devices, including personal protective equipment (PPE), machine guards, light curtains, and guardrails, shield people from hazards; PPE is the final level of the hierarchy of controls, governed by OSHA, ANSI, NIOSH, and ISO standards.
Protective earth (ground)
A protective earth, or equipment ground, is a conductor connecting exposed metal parts of equipment to earth so an insulation fault cannot leave them at a dangerous voltage.
Protective Gloves
Protective gloves: hand coverings of latex, nitrile, or vinyl used as medical PPE or chemical protection; FDA-regulated, leak-tested under ASTM D5151, with nitrile and latex outperforming vinyl in use.
Protective put
A protective put is an option strategy in which an investor who owns stock also buys a put on it, limiting the maximum loss to the put premium.
Protective relay
A protective relay, also called a protection relay, is a device that monitors current and voltage, detects faults, and trips circuit breakers to isolate the faulted section.
Protective stop
A protective stop is an automatic stop of a machine or robot triggered by a safety device such as a light curtain or scanner, defined in ISO 10218-1.
Protective town of San Miguel and the Sanctuary of Jesús Nazareno de Atotonilco
UNESCO World Heritage site 1274 in Guanajuato, Mexico: the 1542 fortified silver-road town of San Miguel de Allende and the 18th-century Sanctuary of Jesús Nazareno de Atotonilco, inscribed 2008 under criteria (ii) and (iv).
Protector (2025 film)
Protector (2025 film), Korean-American action thriller directed by Adrian Grunberg, written by Moon Bong-seop, starring Milla Jovovich as war hero Nikki Halsted rescuing her kidnapped daughter; released US March 6, 2026, Korea March 25, 2026; distinct from Gasteazoro's The Protector and the Malayalam The Protector.
Protector de indios
The Protector de indios (Procurador y Protector General de indios) was a Spanish Crown office defending indigenous people in colonial American courts, first held by Bartolomé de las Casas in 1516.
Protector General of the Western Regions
The Protector General of the Western Regions (西域都护) was the Han dynasty office governing the Tarim Basin's oasis states, created under Emperor Xuan around 60 BC.
Protector Shoal
Protector Shoal, a submarine seamount chain at 55°59'S 28°10'W, is the northernmost, most silicic volcano of the South Sandwich arc; its 1962 eruption produced a pumice raft that circumnavigated Antarctica.
Protectorate
A protectorate is an autonomous territory or state protected diplomatically or militarily by a stronger protector state while retaining formal sovereignty under international law; distinct from colony, protected state, suzerainty, and League/UN mandates and trust territories.
Protectorate General to Pacify the East
The Protectorate General to Pacify the East (Andong Dohobu, 안동도호부) was a Tang dynasty protectorate established at Pyongyang in 668 to govern the former territory of Goguryeo after its conquest.
Protectorate of Bohemia and Moravia
Protectorate of Bohemia and Moravia (Protektorát Čechy a Morava; Reichsprotektorat Böhmen und Mähren): Nazi German occupation regime over the Czech lands, 1939–1945, nominally autonomous but annexed to the Reich, ruled via Reich Protectors and Karl Hermann Frank, ending with the Prague Uprising and Germany's 1945 surrender.
Protectorate of Peru
The Protectorate of Peru (Protectorado del Perú) was the transitional government under José de San Martín as Protector of newly independent Peru from 1821 to 1822.
Protectorate of the Western Regions
The Protectorate of the Western Regions (西域都护府) was the Han dynasty's agency governing the Silk Road oasis states, established around 60 BC with Zheng Ji as first protector-general.
Protégé (门徒)
Protégé (門徒, Moon to) is a 2007 Hong Kong crime drama directed by Derek Yee, produced by Peter Chan, starring Andy Lau, Daniel Wu, Zhang Jingchu, and Louis Koo, about an undercover cop infiltrating a heroin lord for eight years.
Protein
Protein: biological macromolecules of amino acid chains whose sequence determines 3D structure and function; classified into families via Pfam and InterPro, with structures now predicted by AlphaFold.