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Time Without Pity
Time Without Pity is a 1957 British thriller directed by Joseph Losey, his first film under his own name after the Hollywood blacklist, adapted from Emlyn Williams' play Someone Waiting, starring Michael Redgrave as a father with 24 hours to save his son from hanging.
Time zone
A time zone, also called a local time, is a region whose inhabitants keep a common local time, usually a whole number of hours from UTC.
Time-based metering
Time-based metering is an air traffic management method that assigns each aircraft a scheduled time to cross a constraint point, sequencing traffic by time instead of distance.
Time-bin encoding
Time-bin encoding represents quantum information in a single photon placed in a superposition of two time slots separated by a fixed delay, used in quantum key distribution.
Time-correlated single photon counting
Time-correlated single photon counting (TCSPC) is a spectroscopy technique that measures fluorescence lifetimes by timing individual photons against a pulsed excitation source, building a histogram over many pulses.
Time-crystalline eigenstate order
Time-crystalline eigenstate order is a form of quantum order in Floquet systems where the entire many-body spectrum carries long-range order, underlying the many-body-localized discrete time crystal.
Time-delay cosmography
Time-delay cosmography measures the Hubble constant from time delays between gravitationally lensed images of variable sources like quasars, an idea proposed by Søren Refsdal in 1964.
Time-delay integration
Time-delay integration, or drift scanning, is a CCD readout mode where charge shifts across the sensor to match the sky's drift, enabling continuous survey scans.
Time-dependent density functional theory
Time-dependent density functional theory (TDDFT) is a quantum-mechanical method that computes excited states and optical response of atoms, molecules, and materials from the electron density.
Time-dependent dielectric breakdown
Time-dependent dielectric breakdown (TDDB) is a failure mechanism in which a dielectric such as a MOS transistor's gate oxide degrades under sustained electric field until traps form a conducting path.
Time-dependent diffusion MRI
Time-dependent diffusion MRI (TDDMRI or TDD-MRI) is a diffusion MRI technique that varies diffusion time to map microstructure like cell size and density, used mainly in oncology.
Time-dependent inhibition
Time-dependent inhibition, also called slow-onset or slow-binding inhibition, is enzyme inhibition that takes seconds to minutes to reach full effect, seen as curved reaction progress curves.
Time-division multiple access
Time-division multiple access (TDMA) is a channel access method that lets several users share a single radio-frequency carrier by transmitting in assigned time slots within repeating frames.
Time-division multiplexing
Time-division multiplexing (TDM) is a digital technique that combines several signals into one by giving each source a fixed time slot in repeating frames; it underpinned telephone networks from about 1970 to 2010.
Time-domain channel equalization for OFDM
Time-domain channel equalization for OFDM places a finite impulse response filter at the receiver to shorten the effective channel so it fits within the cyclic prefix, preventing interference.
Time-domain equalizer shortening
Time-domain equalizer shortening is a receiver technique that shortens a channel's impulse response so it fits within the cyclic prefix in OFDM and DMT systems.
Time-domain reflectometer
A time-domain reflectometer (TDR) is an electronic test instrument that injects a pulse into a cable and uses the reflections to locate breaks and measure impedance.
Time-domain reflectometry
Time-domain reflectometry (TDR) is a measurement technique that sends a voltage pulse down a cable and reads the reflections to locate faults, measure impedance, and estimate soil moisture.
Time-domain spectroscopy
Time-domain spectroscopy records the electric field of a short radiation pulse over time and Fourier-transforms it to get frequency-dependent material properties like complex refractive index.
Time-domain synchronous OFDM
Time-domain synchronous OFDM (TDS-OFDM) is a modulation scheme developed at Tsinghua University in which a known pseudorandom noise sequence replaces the cyclic prefix, serving as guard interval and training signal.
Time-driven activity-based costing
Time-driven activity-based costing (TDABC) is a cost-allocation method introduced by Robert Kaplan and Steven Anderson in 2004 that assigns resource costs to products and customers using only two parameters.
Time-lagged independent component analysis
Time-lagged independent component analysis (tICA, also called time-structure-based independent component analysis) is a linear dimensionality reduction method that, unlike PCA, finds coordinates with maximal time-autocorrelation and serves mainly to build Markov state models.
Time-lapse microscopy
Time-lapse microscopy is a technique that images a specimen repeatedly over time, producing single-cell records of division, migration, and gene expression that static snapshots cannot resolve.
Time-lapse photography
Time-lapse photography captures still frames at set intervals over long periods and plays them back fast to reveal slow change; rooted in Muybridge and Marey's chronophotography, distinct from hyperlapse (moving camera) and stop motion (posed frames), with interval, shutter, and flicker control as core techniques.
Time-location sampling
Time-location sampling, also called time-space sampling or venue-based sampling, is a probability survey method that recruits hard-to-reach populations at venues where they concentrate, developed in the late 1980s for HIV surveillance.
Time-modulated metasurfaces
Time-modulated metasurfaces are engineered two-dimensional arrays whose electromagnetic response varies in time, allowing them to convert wave frequencies and break reciprocity in an electrically thin structure.
Time-multiplexed photonic cluster states
Time-multiplexed photonic cluster states encode a quantum computer's qubits as sequential time bins of light from one source, enabling entangled states of over one million modes by 2016.
Time-of-check to time-of-use
Time-of-check to time-of-use (TOCTOU, also written TOCTTOU) is a race-condition vulnerability in which an attacker alters a file between a program's check and its use, often gaining privileges.
Time-of-flight
Time-of-flight (TOF) measurement determines the mass, energy, or velocity of particles, ions, or neutrons by timing how long they take to travel a known distance, as in mass spectrometry.
Time-of-flight camera
A time-of-flight (ToF) camera is a depth camera that measures distance to every point in a scene by timing emitted light, producing real-time depth maps.