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Sionna
Sionna is an open-source, GPU-accelerated library built on TensorFlow and developed by NVIDIA for link-level simulation of wireless systems, introduced in 2022 for 5G and 6G research.
Sionna Therapeutics
Sionna Therapeutics is a Waltham, Massachusetts biotechnology company, founded in 2019 by Greg Hurlbut and Mark Munson, developing small molecules that stabilize CFTR to treat cystic fibrosis.
Sioux
The Sioux (Oceti Sakowin, Seven Council Fires) are Northern Plains Native peoples in Lakota, Dakota, and Nakota divisions; "Sioux" is a French adaptation of an Ojibwe word meaning enemy, still used in treaties and tribal legal names.
Sioux Act of 1889
The Sioux Act of 1889 is a United States federal statute that broke up the Great Sioux Reservation and opened nine million acres to homesteading.
Sioux City, Iowa
Sioux City, Iowa: fourth-largest Iowa city (85,797 in 2020) at the Big Sioux–Missouri River confluence in Woodbury County; founded 1854, Stockyards hub, home of the 185th Air Refueling Wing and Flight 232 rescue.
Sioux Falls Skyforce
Sioux Falls Skyforce, NBA G League affiliate of the Miami HEAT based in Sioux Falls, South Dakota; founded 1989 in the CBA, three-time league champion (1996, 2005, 2016), plays at the Sanford Pentagon.
Sioux Falls, South Dakota
Sioux Falls, founded in 1856-57, is the largest city in South Dakota, built around falls on the Big Sioux River; Citibank's 1981 arrival made it a banking center.
Sioux language
Sioux is a cover term for the Dakotan dialects of the Siouan family, including Dakota and Lakota, spoken in the Dakotas and classified as endangered.
Sioux Lookout
Sioux Lookout, Ontario, the Hub of the North: a municipality of about 5,600 in northwestern Ontario serving 29-31 remote First Nation communities, incorporated 1912 as a railway divisional point, with a major regional airport and the Meno Ya Win Health Centre.
Sioux Power Plant
The Sioux Power Plant, also called the Sioux Energy Center, is a 1,099-megawatt coal-fired power station in West Alton, Missouri, whose two units went online in 1967 and 1968.
Siouxsie and the Banshees
Siouxsie and the Banshees: British post-punk/gothic rock band formed in London in 1976 by Siouxsie Sioux and Steven Severin; 11 albums from The Scream (1978) to The Rapture (1995), top 10 hits Hong Kong Garden and Dear Prudence, and the Creatures side project.
Siouxsie and the Banshees discography
Siouxsie and the Banshees is an English rock band formed in London in 1976. They were active until 1996 and released 18 Top 40 hits in the U.K.
Siouxsie Sioux
Siouxsie Sioux (Susan Dallion), English singer, led Siouxsie and the Banshees 1976–1996 and The Creatures with drummer Budgie, and released her solo debut Mantaray in 2007; a defining punk-to-goth figure.
SIP trunking
SIP trunking connects an organization's IP-based phone system, such as an IP-PBX, to the public switched telephone network over a SIP session from a provider.
Sip-and-puff
Sip-and-puff is an assistive technology input method in which a user controls devices by inhaling or exhaling through a mouthpiece, serving people with limited hand function.
Sipa
Sipa (시파) was a political faction of late Joseon Korea, formed from Noron officials under King Jeongjo's conciliation policy and dominant into the Sunjo reign.
Sipa Group (思派集团)
Sipa Group (思派集团) is a Chinese cancer-care and health-services platform founded in 2014 by Ma Xuguang, Li Ji, and Li Dayong, behind Hong Kong-listed Sipai Health (HKEX 0314).
Sipa Network (思派网络)
Sipa Network (思派网络) is a Chinese healthcare company founded in 2014, focused on oncology and specialty drugs; its successor, Sipa Health Technology, listed in Hong Kong under stock code 0314.
Sipahi (سپاهی)
Sipahi (سپاهی): Ottoman provincial cavalryman holding a timar revenue assignment in return for military service; backbone of Ottoman armies from the 14th to late 16th century, distinct from the salaried kapıkulu sipahi cavalry division.
Sipahi cavalry
The sipahi cavalry was the mounted arm of the Ottoman army, made up of timar-holding provincial cavalrymen and a salaried household corps, dominant until the mid-16th century.
Sipat power station
Sipat power station, or Sipat Super Thermal Power Station, is a 2,980 MW coal-fired power station operated by NTPC at Sipat in Bilaspur district, Chhattisgarh, India.
Sipay
Sipay is a Turkish fintech company founded in 2019 by Nezih Sipahioğlu and headquartered in Istanbul, offering payment processing, digital wallets, embedded finance, and foreign-exchange services.
SiPearl
SiPearl is a French fabless semiconductor startup based in Maisons-Laffitte, founded by Philippe Notton in 2019 to design low-power Arm processors for high-performance computing and AI.
Siphiwe Tshabalala
Siphiwe Tshabalala (Lawrence Siphiwe Tshabalala, "Shabba"), South African left winger born 1984 in Soweto; scored the opening goal of the 2010 World Cup for Bafana Bafana against Mexico; long-serving Kaizer Chiefs midfielder, 91 caps, retired 2021.
Sipho Chaine
Sipho Justin Chaine (born 1996) is a South African goalkeeper for Orlando Pirates and Bafana Bafana; he set the PSL single-season clean-sheet record (21 in 2025/26) and won the 2024/25 Goalkeeper of the Season award.
Sipho Nkosi
Sipho Nkosi, born 1954, is a South African businessman who founded Eyesizwe Coal, led coal producer Exxaro Resources until 2016, and co-chairs the investment group Talent10 Holdings.
Sipho Sepamla
Sipho Sepamla, born Sydney Sipho Sepamla, was a South African poet, novelist, and activist based in Soweto, a leading poet of the 1970s Black Consciousness era.
Siphon
A siphon, also called the siphon effect, is an inverted U-shaped tube that carries liquid from a higher reservoir to a lower discharge point without a pump once primed.
Siphon (mollusc)
Siphon (mollusc): a tubular mantle extension in bivalves, with incurrent and excurrent tubes for feeding and respiration. Siphonate burrowers comprise almost 60% of extant marine bivalve species and burrow deeper and faster than nonsiphonate taxa.
Siphon recorder
The siphon recorder, also written syphon recorder, is an instrument for receiving signals on submarine telegraph cables, invented by William Thomson, later Lord Kelvin, in 1867.