Results 31 to 40 of about 4,797 (280)
Investigations of laser pumped gas cell atomic frequency standard [PDF]
, 1982 The performance characteristics of a rubidium gas cell atomic frequency standard might be improved by replacing the standard rubidium discharge lamp with a single mode laser diode. Aspects of the laser pumped gas cell atomic clock studied include effects
Camparo, J. C. +2 more
core +1 more source
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Algorithm for Taming Rubidium Atomic Clocks Based on Longwave (Loran-C) Timing Signals
Remote SensingThis paper explores effective methods for taming rubidium atomic clocks with longwave timing signals. In an in-depth analysis of the time-difference data between the 1PPS timing signal output from the ground-wave signal received by a long-wave receiver ...
Xiaolong Guan +6 more
doaj +1 more source
Properties of Rb CPT Atomic Clock at Subharmonic Microwave Modulation Frequencies
IEEE Photonics Journal, 2019 This letter presents for the first time a systematic study of an atomic frequency standard based on сoherent population trapping (CPT) effect in 87Rb vapour optically pumped with a multifrequency laser radiation formed with sidebands of a single ...
Daba Radnatarov +5 more
doaj +1 more source
Electronic system for drift clock calculation and synchronization for seafloor observatory [PDF]
, 2016 The paper describes a new electronic device that allows an easily measurement of the drift between a reference time source (usually GPS) and an atomic rubidium clock which is normally used in seafloor observatories.
Apponi, Umberto +3 more
core
Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway
Molecular Oncology, EarlyView.Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed +10 more
wiley +1 more source
Velocity-selective direct frequency-comb spectroscopy of atomic vapors [PDF]
, 2012 We present an experimental and theoretical investigation of two-photon direct frequency-comb spectroscopy performed through velocity-selective excitation.
A. Bartels +10 more
core +3 more sources
Molecular Oncology, EarlyView.Single circulating tumor cells (sCTCs) from high‐grade serous ovarian cancer patients were enriched, imaged, and genomically profiled using WGA and NGS at different time points during treatment. sCTCs revealed enrichment of alterations in Chromosomes 2, 7, and 12 as well as persistent or emerging oncogenic CNAs, supporting sCTC identity.
Carolin Salmon +9 more
wiley +1 more source
Effect of shield magnetization on variations in the frequency of onboard rubidium atomic clocks
St. Petersburg Polytechnical University Journal: Physics and MathematicsIn the paper, the results of a study of the influence of the magnetic shield magnetization on the relative frequency instability of small-sized rubidium atomic clocks have been presented.
Ermak Sergey +4 more
doaj +1 more source
Time-synchronized VLF phase-tracking receiver [PDF]
, 1973 Coded signals transmitted at very low frequencies by National Bureau of Standards via its radio facility WWVL contain both primary time and frequency information.
Ward, S. C.
core +1 more source