Results 111 to 120 of about 1,324,164 (376)
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
Realisation of High-Frequency DRO Oscillators with Mosfet Transistors for Sub-MMWAVE Band
Acta Electrotechnica et InformaticaIn high-frequency electronics, optimizing RF oscillators performance is essential, especially as applications reach into wide frequency bands. This article describes proposed clock generators for UWB sensor systems based on oscillators with dielectric ...
Jurík Patrik +2 more
doaj +1 more source
Epigenetic age-predictor for mice based on three CpG sites
eLife, 2018 Epigenetic clocks for mice were generated based on deep-sequencing analysis of the methylome. Here, we demonstrate that site-specific analysis of DNA methylation levels by pyrosequencing at only three CG dinucleotides (CpGs) in the genes Prima1, Hsf4 ...
Yang Han +9 more
doaj +1 more source
Time in the theory of relativity: on natural clocks, proper time, the clock hypothesis, and all that [PDF]
, 2017 When addressing the notion of proper time in the theory of relativity, it is usually taken for granted that the time read by an accelerated clock is given by the Minkowski proper time.
Valente, Mario Bacelar
core
Non-destructive measurement of the transition probability in a Sr optical lattice clock
, 2009 We present the experimental demonstration of non-destructive probing of the 1S0-3P0 clock transition probability in an optical lattice clock with 87Sr atoms. It is based on the phase shift induced by the atoms on a weak off-resonant laser beam.
F.-L. Hong +5 more
core +2 more sources
A multi-tissue full lifespan epigenetic clock for mice
Aging, 2018 Human DNA-methylation data have been used to develop highly accurate biomarkers of aging ("epigenetic clocks"). Recent studies demonstrate that similar epigenetic clocks for mice (Mus Musculus) can be slowed by gold standard anti-aging interventions such
M. Thompson +9 more
semanticscholar +1 more source
Single‐cell insights into the role of T cells in B‐cell malignancies
FEBS Letters, EarlyView.Single‐cell technologies have transformed our understanding of T cell–tumor cell interactions in B‐cell malignancies, revealing new T‐cell subsets, functional states, and immune evasion mechanisms. This Review synthesizes these findings, highlighting the roles of T cells in pathogenesis, progression, and therapy response, and underscoring their ...
Laura Llaó‐Cid
wiley +1 more source
, 2017 In static timing analysis, clock-to-q delays of flip-flops are considered as constants. Setup times and hold times are characterized separately and also used as constants.
Li, Bing +2 more
core +1 more source
Scientific Reports, 2018 Microbiota-derived short-chain fatty acids (SCFAs) and organic acids produced by the fermentation of non-digestible fibre can communicate from the microbiome to host tissues and modulate homeostasis in mammals.
Y. Tahara +9 more
semanticscholar +1 more source
A mathematical model for the atomic clock error in case of jumps
, 2015 We extend the mathematical model based on stochastic differential equations describing the error gained by an atomic clock to the cases of anomalous behavior including jumps and an increase of instability. We prove an exact iterative solution that can be
Tavella, Patrizia, Zucca, Cristina
core +1 more source