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On-chip superconducting resonators
On-chip superconducting resonators are microwave resonant circuits patterned as thin superconducting films on a chip, storing microwave photons with very low dissipation for qubit readout and spectroscopy.
On-chip variation
On-chip variation (OCV) is the difference in delay between identical circuit cells at different locations on one chip, caused by local variation in process, voltage, and temperature.
On-device LLM inference
On-device LLM inference is the practice of running transformer models directly on consumer hardware like smartphones. This technology is driven by privacy, latency, and cost.
On-load tap changer
An on-load tap changer (OLTC) is a switching device in a power transformer that regulates output voltage in discrete steps while the transformer remains energized and carrying load.
On-off keying
On-off keying (OOK) is the simplest form of amplitude-shift keying, transmitting bits by switching a carrier on and off, used in keyless entry and optical links.
On-orbit satellite servicing
On-orbit satellite servicing is the refueling, repair, and upgrading of satellites in orbit, from the 1984 SolarMax repair and Hubble missions to commercial robotic craft like MEV-1.
On-policy distillation
On-policy distillation is a post-training method for language models in which the student generates its own rollouts and a stronger teacher grades every token, combining reinforcement learning's on-policy training with dense distillation supervision.
On-policy interpretability of reasoning models
On-policy interpretability of reasoning models is the practice of monitoring a reasoning model's internal states and chain of thought to detect hidden objectives and unfaithful reasoning.
On-premises software
On-premises software, sometimes called on-prem, is software an organization installs and runs on its own servers, with internal IT staff handling hardware, updates, and security, in contrast to cloud-based SaaS.
On-stack replacement
On-stack replacement is a virtual machine technique for switching a running function between compiled versions of its code while it executes, used in Java HotSpot and Google V8.
Onagawa nuclear power plant
The Onagawa nuclear power plant (女川原子力発電所) is a nuclear station in Onagawa, Miyagi Prefecture, Japan, run by Tohoku Electric Power and known for safely withstanding the 2011 earthquake and tsunami.
Once-through fuel cycle
The once-through fuel cycle is an open nuclear fuel cycle in which uranium fuel is used once in a reactor, then disposed of directly without reprocessing.
Oncor
Oncor is a regulated electricity transmission and distribution utility headquartered in Dallas, Texas, operating the largest such system in Texas and serving more than 4.1 million homes and businesses.
One Air
One Air is a British all-cargo airline based at Hampton Wick, London, operating Boeing 747 and 777 freighters on charter and scheduled services across Asia, Europe, and the Middle East.
One big table
One Big Table (OBT), also called wide table or super table, is a denormalized data modeling approach flattening facts and dimensions into one wide join-free table for analytics, best for 1-3 filter dimensions and as a serving layer above a star schema.
One Canada Square
One Canada Square, also known as Canary Wharf Tower, is a 50-storey office skyscraper at Canary Wharf in London, designed by César Pelli and completed in 1991.
One Stone Energy Partners, L.P.
One Stone Energy Partners, L.P. is a Cayman Islands limited partnership based in New York that invests in oil and gas, raising $109 million in 2012.
One UI
One UI is Samsung's custom user interface built on Google's Android that powers Galaxy smartphones, tablets, and watches, unveiled in 2018 as a successor to TouchWiz and Samsung Experience.
One Vanderbilt
One Vanderbilt, also known as One Vanderbilt Place, is a 1,401-foot (427-meter) supertall office skyscraper in Midtown Manhattan, opened in 2020 next to Grand Central Terminal.
One Wilshire
One Wilshire is a thirty-story office tower at 624 South Grand Avenue in downtown Los Angeles, described as the West's principal carrier hotel for telecommunications networks.
One World Trade Center
One World Trade Center, also known as the Freedom Tower, is a 104-story, 1,776-foot skyscraper at the rebuilt World Trade Center site in Lower Manhattan, opened in 2014.
One-class support vector machine
The one-class support vector machine, also called One-Class SVM or OCSVM, is an unsupervised machine learning algorithm for novelty detection, introduced by Bernhard Schölkopf and colleagues in 2001.
One-hot
One-hot encoding, also called one-of-K or dummy encoding, represents a categorical variable as a vector with a 1 for the instance's category and 0 elsewhere.
One-instruction set computer
A one-instruction set computer (OISC), also known as a URISC or single instruction computer, uses one instruction, typically subleq, to perform any computation, trading speed for minimal hardware and mainly serving teaching and research.
One-time pad
The one-time pad, also called the Vernam cipher, is an encryption method that XORs a message with a random key used once, achieving perfect secrecy.
One-time password
A one-time password (OTP) is a secret code generated by an authenticator and used only once to log in, so an intercepted code cannot be replayed later.
One-way attack drone
A one-way attack drone, also known as a loitering munition or kamikaze drone, is a single-use UAV with an explosive warhead flown into a point target.
One-way function
A one-way function is a function that is easy to compute on every input but hard to invert, the foundational assumption of modern cryptography that has never been proved to exist.
One57
One57, also known as Carnegie 57, is a 1,004-foot skyscraper at 157 West 57th Street in Midtown Manhattan, with luxury condominiums above a Park Hyatt hotel.
oneAPI
oneAPI is an open, standards-based unified programming model launched by Intel in 2019 to write code for CPUs, GPUs, and other accelerators, now governed by the UXL Foundation.