All articles starting with U

Upajjhatthana Sutta

The Upajjhatthana Sutta (AN 5.57) is a discourse of the Anguttara Nikaya in which the Buddha names five subjects everyone should often review, the source of the Five Remembrances.

Upaka

Upaka (उपक), also called Kāḷa, was an Ājīvaka ascetic whom the newly awakened Buddha met on the road between Gayā and the Bodhi tree, as recorded in the Majjhima Nikāya.

Upaka Mandikāputta

Upaka Mandikāputta (उपको मण्डिकापुत्तो) is the name of two Pali canon figures, notably an Ājīvika ascetic who met the newly awakened Buddha on the road near Gayā.

Upakhyana (उपाख्यान, upākhyāna) is a Sanskrit term for a subordinate tale or episode embedded in a longer narrative, especially the Mahabharata, whose 67 cataloged upakhyanas clarify points of dharma.

Upakosala

Upakosala (उपकोसल) is a Vedic religious student, son of Kāmalāyana, in the Chāndogya Upanishad, who after twelve years tending Satyakāma Jābāla's fires was taught by the fires and then by Satyakāma.

Upamanyu Chatterjee

Upamanyu Chatterjee (born 1959) is an Indian novelist and retired civil servant of the Indian Administrative Service, best known for his debut novel English, August (1988) and winner of the Sahitya Akademi Award.

Upamitibhavaprapanchakatha

Upamitibhavaprapanchakatha is a tenth-century Jain allegorical narrative in Sanskrit by the monk Siddharshi, completed in 906, which Hermann Jacobi called the first elaborate allegory in Indian literature.

Upanayana

Upanayana, also called the Sacred Thread ceremony or Bratabandha, is the Hindu initiation rite marking a boy's entry into Vedic student life with a sacred thread.

Upanishad Ganga (उपनिषद् गंगा)

Upanishad Ganga (उपनिषद् गंगा) is a 52-episode Hindi TV series on the Upanishads by Chinmaya Creations, conceived by Swami Tejomayananda, directed by Chandraprakash Dwivedi, aired on Doordarshan 2012-2013 and later on YouTube in five languages.

Upanishads (उपनिषद्)

The Upanishads (उपनिषद्) are Sanskrit texts attached to the four Vedas, composed from about 800 BCE to 100 CE, teaching the identity of atman and Brahman.

Upano Valley sites

Upano Valley sites: pre-Hispanic settlement cluster in Amazonian Ecuador's Upano Valley, with over 6,000 earthen platforms, 15 urban centers, and straight roads, occupied about 500 BCE to 300–600 CE by the Kilamope and Upano cultures.

Upapandavas (उपपाण्डव)

Upapandavas (उपपाण्डव), the five sons of Draupadi in the Mahabharata: Prativindhya, Sutasoma, Shrutakarma, Shatanika, Shrutasena, one by each Pandava; all killed by Ashwatthama in the Sauptika Parva night raid.

Upapurana

Upapurana (उपपुराण, "secondary Purana") is a genre of Sanskrit Hindu religious literature beside the eighteen Mahapuranas, resembling them in mythology and ritual; lists disagree, and over 100 titles are known.

Uparupaka

Uparupaka (उपरूपक, literally "a lesser drama") is the Sanskrit dramaturgical term for minor drama and dance-drama forms, contrasted with the ten major rupakas of Bharata's Natyashastra and emphasizing music, dance, and gesture; Vishvanatha's Sahityadarpana recognizes eighteen.

Uparvas

Uparvas (ઉપરવાસ) is a 1975 Gujarati novel by Raghuveer Chaudhari, first part of the trilogy Uparvas Kathatrayi, which won the Sahitya Akademi Award in 1977 and depicts village life in North Gujarat.

Upasana Singh

Upasana Singh (उपासना सिंह), Indian actress of Hindi, Punjabi, and regional film and TV; Pinky Bua on Comedy Nights with Kapil; PTC and Indian Telly Award winner; also producer and CINTAA General Secretary.

Upasiva

Upasīva (उपसिव) was one of sixteen brahman students of Bāvarī who questioned the Buddha in the Parāyanavagga of the Sutta Nipāta, in a dialogue known for its flame simile.

Upatapassi

Upatapassi, who calls himself Sarasigāmamūla-mahāsāmī, was a fifteenth-century Pali author of the Vuttamālāsandesa Śataka, a 102-stanza poem with laudatory verses meant to teach verse recitation.

Oct 15, 2026

UPB (protocol)

UPB (Universal Powerline Bus) is a lighting and home-automation protocol that sends digitally encoded commands over standard house wiring, introduced by Powerline Control Systems in 1999.

Oct 21, 2026

Upbeat nystagmus

Upbeat nystagmus (UBN) is acquired vertical nystagmus with downward slow phases and upward quick phases in straight-ahead gaze, signaling central vestibular dysfunction from medullary, pontine, or cerebellar lesions, caused by stroke, MS, tumors, or Wernicke's encephalopathy, treated with 4-aminopyridine.

Upchurch (musician)

Upchurch (Ryan Edward Upchurch, born 1991, Pegram, Tennessee), also Upchurch the Redneck, is an independent American country rap and hick-hop artist whose 2015 EP Cheatham County charted on Billboard and who alternates hip-hop and country albums.

Upcoming structural changes to local government in England

English local government reorganisation (LGR): the 2024 Devolution White Paper plan to replace England's remaining two-tier county and district councils with unitary authorities, covering about 20 million people; decisions began in Surrey in 2026 but were partly withdrawn pending a rapid review.

Upconversion nanoparticle

An upconversion nanoparticle (UCNP) is a nanoscale crystal, usually lanthanide-doped NaYF4, that converts multiple near-infrared photons into higher-energy visible emission, enabling low-background bioimaging, sensing, and therapy.

Upconversion nanoparticle optogenetics

Upconversion nanoparticle optogenetics is a neuromodulation technique in which lanthanide-doped upconversion nanoparticles convert tissue-penetrating near-infrared light into visible light that activates optogenetic proteins, enabling deep-brain stimulation without implanted optical fibers.

Upconversion nanoparticle photodynamic therapy

Upconversion nanoparticle photodynamic therapy (UCNP-PDT) is an experimental light-activated cancer and antimicrobial treatment in which lanthanide-doped nanoparticles convert deep-penetrating near-infrared light into visible light that activates a photosensitizer.

Upcycling

Upcycling transforms waste or unwanted products into goods of higher quality or value without breaking them down, contrasting with downcycling and recycling. Term coined by Reiner Pilz (1994); apparel LCAs report up to 87% impact reduction, dependent on durability and energy source.