Results 71 to 80 of about 1,314,904 (274)
Quantitative analysis of regulatory flexibility under changing environmental conditions [PDF]
, 2010 The circadian clock controls 24-h rhythms in many biological processes, allowing appropriate timing of biological rhythms relative to dawn and dusk. Known clock circuits include multiple, interlocked feedback loops.
Adrian W Thomson +12 more
core +4 more sources
Circadian clock protein BMAL1 regulates IL-1β in macrophages via NRF2
Proceedings of the National Academy of Sciences of the United States of America, 2018 Significance The molecular clock provides an anticipatory mechanism, allowing organisms to prepare and respond to daily changes in the external environment.
James O. Early +17 more
semanticscholar +1 more source
Ultrastable optical clock with two cold-atom ensembles [PDF]
Nature Photonics, 2016 Optical clocks with a record low zero-dead-time instability of 6 × 10–17 at 1 second are demonstrated in two cold-ytterbium systems. The two systems are interrogated by a shared optical local oscillator to nearly eliminate the Dick effect.
M. Schioppo +19 more
semanticscholar +1 more source
Time-Domain Evaluation Method for Clock Frequency Stability Based on Precise Point Positioning
IEEE Access, 2019 The Global Navigation Satellite System (GNSS) and GNSS receivers can be used to measure the time-frequency errors of receiver clocks so as to evaluate their frequency stability. The calculation of receiver clock error by single point positioning (SPP) is
Yang Lei +4 more
doaj +1 more source
Real-time simulation clock [PDF]
, 1990 The invention is a clock for synchronizing operations within a high-speed, distributed data processing network. The clock is actually a distributed system comprising a central clock and multiple site clock interface units (SCIUs) which are connected by ...
Bennington, Donald R. +1 more
core +1 more source
Rodent models for the analysis of tissue clock function in metabolic rhythms research [PDF]
, 2017 The circadian timing system consists on a distributed network of cellular clocks that together coordinate 24-h rhythms of physiology and behavior. Clock function and metabolism are tightly coupled, from the cellular to the organismal level.
Astiz, Mariana +3 more
core +2 more sources
Marine DrugsAging is closely linked to various health challenges, including cardiovascular disease, metabolic disorders, and neurodegenerative conditions.
Youngji Han +2 more
doaj +1 more source
Processing circuit with asymmetry corrector and convolutional encoder for digital data [PDF]
, 1987 A processing circuit is provided for correcting for input parameter variations, such as data and clock signal symmetry, phase offset and jitter, noise and signal amplitude, in incoming data signals.
Pfiffner, Harold J.
core +1 more source
Preserving Minors’ Rights After Casey: The “New Battlefield” of Negligence and Strict Liability Statutes [PDF]
, 1999 Simultaneous Switching Noise (SSN) is one of the major problems in today highspeed circuits. Power-Ground voltage fluctuation is significantly increasing due to L ∗ (di/dt)) noise known as Power-Ground bounce and can be one major noise source in modern ...
Quinn, Pammela S.
core +2 more sources
Behavioural Processes, 1998 Four rats and four pigeons were monitored while performing retrospective timing tasks. All animals displayed collateral behaviors which could have mediated their temporal judgements. Statistical analysis made a good case for such mediation in the case of two pigeons performing on a spatially-differentiated response, but not for the two responding on a ...
Scott S. Hall +2 more
openaire +3 more sources