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Pilgrimage Church of St John of Nepomuk at Zelená Hora
Pilgrimage Church of St John of Nepomuk at Zelená Hora (Poutní kostel sv. Jana Nepomuckého na Zelené hoře), a 1719–1722 five-pointed star-shaped Baroque Gothic church by Jan Blažej Santini Aichel near Žďár nad Sázavou, Czech Republic; UNESCO World Heritage Site since 1994, criterion (iv).
Pilkington (glass manufacturer)
Pilkington is a British flat glass manufacturer founded in St Helens in 1826, now part of Japan's NSG Group and known for inventing the float glass process.
Pillar (car)
A pillar in a car is a vertical body member lettered A to D from front to back that supports the roof and helps resist crush in rollovers.
Pillbox (military)
A pillbox, also called a military pillbox, is a small concrete fortification fitted with loopholes for rifles and machine guns, first used by Germany during the First World War.
Pillbox hat
The pillbox hat is a small, brimless hat with a flat, circular top and short cylindrical sides, named for old pill containers and made famous by Jacqueline Kennedy in 1961.
PillCam
PillCam is a family of single-use ingestible camera capsules made by Medtronic that transmit wireless video of the gastrointestinal tract, first used in 1999 and FDA-cleared in 2001.
Pillow
A pillow is a cushioned support placed under the head during sleep to keep the head, neck, and spine aligned, typically filled with down, feathers, foam, or latex.
Pilot carrier
A pilot carrier is a low-level reference signal transmitted with a suppressed or reduced carrier so a receiver can recover the exact frequency and phase needed for demodulation.
Pilot certification in the United States
Pilot certification in the United States is the Federal Aviation Administration's system of licensing civilian pilots through a ladder of certificates and ratings, governed mainly by 14 CFR part 61.
Pilot contamination
Pilot contamination is an impairment in multi-cell massive MIMO wireless systems in which reused pilot sequences corrupt base stations' channel estimates, causing inter-cell interference; identified by Thomas Marzetta in 2010.
Pilot contamination attack
A pilot contamination attack is a physical-layer attack on massive MIMO wireless systems in which an attacker transmits a legitimate user's pilot sequence, corrupting channel estimates.
Pilot error
Pilot error, also known as cockpit error, is an action or decision by a flight crew that contributes to an aviation accident, cited in roughly 60 to 80 percent of crashes.
Pilot Flying J
Pilot Flying J, the brand of Pilot Travel Centers LLC, is a Knoxville-based operator of the largest travel center network in North America, owned by Berkshire Hathaway.
Pilot in command
The pilot in command (PIC), also known as the air captain, is the pilot designated as commanding an aircraft, holding final authority and legal responsibility for its safe operation.
Pilot injection
Pilot injection is a diesel-engine injection strategy in which a small fuel charge is injected before the main injection, shortening ignition delay and lowering combustion noise and NOx.
Pilot licensing and certification
Pilot licensing and certification is the system by which a state authorizes pilots to fly, set internationally by ICAO and nationally by authorities like the FAA.
Pilot licensing and training
Pilot licensing and training is the system by which a beginner becomes a qualified commercial pilot, with ICAO setting standards and regulators like the FAA issuing licenses.
Pilot licensing in Australia
Pilot licensing in Australia is the system by which the Civil Aviation Safety Authority grants flight crew licenses under CASR Part 61, in force since 2014.
Pilot licensing in Canada
Pilot licensing in Canada, also known as pilot certification, is the system by which Transport Canada issues pilot permits, licenses, and ratings under the Canadian Aviation Regulations.
Pilot licensing in the United Kingdom
Pilot licensing in the United Kingdom is the system by which the UK Civil Aviation Authority issues pilot licenses and medical certificates, governed by the Air Navigation Order 2016.
Pilot medical certification
Pilot medical certification is the formal assessment that a pilot is medically fit to exercise license privileges, run nationally through systems like the FAA's three classes and EASA Part-MED.
Pilot symbol assisted detection
Pilot symbol assisted detection is a receiver technique in which known pilot symbols, multiplexed with the data stream, let the receiver measure fading and estimate the channel by interpolation.
Pilot tunnel
A pilot tunnel, also called a pilot drift, is a small tunnel excavated ahead of a larger tunnel to explore ground conditions and assist final excavation.
Pilot-based channel estimation
Pilot-based channel estimation is a wireless receiver technique in which known pilot symbols are inserted so the receiver can measure and reconstruct the channel, used in LTE, 5G NR, and Wi-Fi.
Pilsner
Pilsner is a pale, golden lager first brewed by Josef Groll in Plzeň, Bohemia, in 1842; its soft hop bitterness became the template for most pale lagers worldwide.
Pilsner Urquell Brewery
The Pilsner Urquell Brewery (Plzeňský Prazdroj) is a brewery in Plzeň, Czech Republic, where the world's first golden pilsner was first brewed by Josef Groll in 1842 and is still made today.
Piltun-Astokhskoye Oil and Gas Field
Piltun-Astokhskoye (Пильтун-Астохское) is an offshore oil and gas field in the Sea of Okhotsk off Sakhalin Island, discovered in 1986 and producing Russia's first offshore oil in 1999.
Pilz (company)
Pilz GmbH & Co. KG is a German family-owned maker of safe automation technology, founded in 1948 and known for the PNOZ, the first emergency stop relay.
Pimsleur Language Programs
Pimsleur Language Programs is an audio-first language learning course series built on linguist Paul Pimsleur's method, now a Simon & Schuster Audio imprint delivering 30-minute daily spoken lessons in 51 languages through a mobile app.
PIN diode
A PIN diode is a semiconductor diode with a lightly doped intrinsic layer between its p-type and n-type regions, widely used for RF switching, attenuation, photodetection, and power rectification.