All articles starting with P
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Persistent Postural-Perceptual Dizziness
Persistent postural-perceptual dizziness (PPPD), also called chronic subjective dizziness or phobic postural vertigo, is a chronic functional vestibular disorder defined by Bárány Society 2017 criteria: persistent non-spinning dizziness on most days for 3+ months, worsened by upright posture, motion, and visual stimuli; ICD-11 code AB32.0.
Persistent pupillary membranes
Persistent pupillary membrane (PPM), remnants of the fetal tunica vasculosa lentis, appears as iris strands crossing the pupil; seen in about 95% of neonates and 20% of adults, usually asymptomatic, treated only if vision-threatening.
Persistent scatterer InSAR
Persistent scatterer InSAR (PSInSAR, or PSI) is a radar technique that measures surface deformation with millimeter-scale velocity precision at phase-stable ground points in time series of interferometric SAR images.
Persistent scatterer interferometry
Persistent scatterer interferometry, developed at the Politecnico di Milano and first reported in 2000, is a radar technique measuring millimeter-scale ground deformation from stacks of satellite SAR images.
Persistent Systems
Persistent Systems is an Indian IT services and consulting company founded in 1990 and operating in 15 countries, known for digital engineering, enterprise modernization, and cloud services.
Persistent truncus arteriosus
Persistent truncus arteriosus, also called common arterial trunk, is a rare congenital heart defect with one arterial trunk and truncal valve, always with a VSD; neonatal repair is required, with frequent later conduit and valve reinterventions.
Persistent vegetative state
Persistent vegetative state (PVS), also called unresponsive wakefulness syndrome, is complete unawareness with sleep-wake cycles after brain injury lasting over 1 month; misdiagnosis reaches 37–43% and some patients recover consciousness.
Persius
Persius (Aulus Persius Flaccus, 34–62 CE) was a Roman poet who wrote six Stoic verse satires and ranks with Horace and Juvenal among the canonical Roman satirists.
Person
Person: in philosophy, a being with special mental and moral status; the concept anchors personal identity debates among Lockean personhood, psychological-continuity views, animalism, and narrative accounts.
Person of color
Person of color (POC): US collective term for anyone non-white, born twice: late-1700s 'free people of color' (gens de couleur), and post-1970s revival in Black and feminist activism; now standard style-guide vocabulary.
Person of Interest (TV series)
Person of Interest is a CBS crime drama (2011–2016, five seasons, 103 episodes) created by Jonathan Nolan, starring Jim Caviezel and Michael Emerson, about an AI called the Machine that predicts violent crimes via mass surveillance.
Person re-identification
Person re-identification (re-ID) is a computer vision task that assigns the same identity to a person seen in images or videos from different cameras, supporting multi-camera surveillance.
Person to Person (Mad Men)
"Person to Person" is the 2015 series finale of Mad Men (season 7, episode 14, AMC), built around Don Draper's operator-assisted phone calls to Sally, Peggy, and Betty, ending with his meditation and the 1971 Hilltop Coca-Cola commercial.
Person-centered therapy
Person-centered therapy, also called client-centered or Rogerian therapy, is a non-directive psychotherapy developed by American psychologist Carl Rogers in the 1940s, built on empathy, congruence, and unconditional positive regard.
Persona
Persona: the public face or social mask a person presents, from Jung's analytic psychology (Latin for actor's mask), contrasted with the private self; studied empirically as self-presentation and impression management, and now used for LLM role-playing.
Persona (1966 film)
Persona (1966) is Ingmar Bergman's Swedish black-and-white psychological drama, also known by the working title Kinematografi, starring Liv Ullmann as a mute actress and Bibi Andersson as her nurse, shot on Faro by Sven Nykvist.
Persona (identity verification service)
Persona, formally Persona Identities, is an American identity verification company in San Francisco founded in 2018 by Rick Song and Charles Yeh, valued at $2 billion in 2025.
Persona (user experience)
A persona, in user experience design, is a fictional but realistic description of a typical product user, built from research to help design teams make decisions.
Persona (페르소나)
Persona (페르소나) is a 2019 Netflix Korean anthology of four short films, Love Set, Collector, Kiss Burn, and Walking at Night, each by a different director and all starring IU (Lee Ji-eun) in her film debut; a planned Sulli-led second season became Persona: Sulli (2023).
Persona (ペルソナ) (series)
Persona (ペルソナ) is Atlus's RPG series, a 1996 school-themed spin-off of Megami Tensei. Social Links, calendar life simulation, and Persona fusion define Persona 3 through 5; Persona 6 was announced in 2026.
Persona 2: Eternal Punishment
Persona 2: Eternal Punishment, titled Persona 2: Punishment (ペルソナ2 罰) in Japan, is a 2000 Atlus role-playing game for the PlayStation and the third Persona entry.
Persona 2: Innocent Sin (ペルソナ2 罪)
Persona 2: Innocent Sin (ペルソナ2 罪) is Atlus's 1999 PlayStation JRPG set in Sumaru City, where rumors become reality. Unlocalized on PS1 (Hitler villain taboo), it reached English via a 2011 PSP remake; Eternal Punishment is its sequel.
Persona 3 (ペルソナ3)
Persona 3 (ペルソナ3) is Atlus's 2006 PlayStation 2 JRPG about students fighting Shadows in the Dark Hour. It introduced the calendar and Social Link systems and spawned FES, Portable, and the 2024 remake Reload.
Persona 3 Reload
Persona 3 Reload (ペルソナ3 リロード) is a 2024 video game by Atlus, a full remake of the 2006 PlayStation 2 role-playing game Persona 3 with modernized presentation and combat.
Persona 4 (ペルソナ4)
Persona 4 (ペルソナ4) is Atlus's 2008 PlayStation 2 JRPG, set in rural Inaba, where students investigate supernatural murders via the TV World. Metacritic 90; Golden (2012) 93; remake Persona 4 Revival due February 18, 2027.
Persona 4 Arena Ultimax
Persona 4 Arena Ultimax, released in Japan as Persona 4: The Ultimax Ultra Suplex Hold, is a 2D fighting game by Arc System Works and Atlus, released in 2014.
Persona 4 Revival
Persona 4 Revival (ペルソナ４ リバイバル) is ATLUS's full remake of Persona 4 Golden, announced June 2025, releasing February 18, 2027 on PS5, Xbox, Windows, Steam, and Switch 2 (May 20, 2027), with new battle systems and re-recorded voice acting.
Persona 4: Dancing All Night
Persona 4: Dancing All Night (ペルソナ4 ダンシング・オールナイト) is Atlus and Dingo's 2015 rhythm game spin-off of Persona 4 for PS Vita, with dance battles replacing RPG combat, a visual-novel story mode, and PS4 release only via the Endless Night Collection.
Persona 4: The Animation
Persona 4: The Animation (ペルソナ４アニメーション) is a 2011–2012 AIC ASTA TV anime adapting Atlus's Persona 4 game, directed by Seiji Kishi with music by Shoji Meguro and the game's Japanese cast retained.
Persona 5
Persona 5 (ペルソナ5) is Atlus's 2016 JRPG about high school Phantom Thieves stealing corrupt hearts in Tokyo, directed by Katsura Hashino; Metacritic 93, Royal 95, over 13 million Persona 5-branch sales.