Architecture for the photonic integration of an optical atomic clock
Optica, 2019 Laboratory optical atomic clocks achieve remarkable accuracy (now counted to 18 digits or more), opening possibilities for exploring fundamental physics and enabling new measurements.
Z. Newman +21 more
semanticscholar +1 more source
Compensation Method for Sensor Network Clock Error Based on Cyclic Symmetry Algorithm
Sensors, 2020 Since the existing methods cannot evaluate the time delay of different layers of sensor networks, there are some problems such as the low precision of clock error compensation, high time delay, and low efficiency of communication in sensor networks.
Hailiang Feng +3 more
doaj +1 more source
Curriculum sequencing and the acquisition of clock reading skills among Chinese and Flemish children [PDF]
, 2013 The present study reexamines the adoption of clock reading skills in the primary mathematics curriculum. In many Western countries, the mathematics curriculum adopts a number of age-related stages for teaching clock reading skills, that were defined by ...
Burny, Elise +4 more
core +2 more sources
^{27}Al^{+} Quantum-Logic Clock with a Systematic Uncertainty below 10^{-18}.
Physical Review Letters, 2019 We describe an optical atomic clock based on quantum-logic spectroscopy of the ^{1}S_{0}↔^{3}P_{0} transition in ^{27}Al^{+} with a systematic uncertainty of 9.4×10^{-19} and a frequency stability of 1.2×10^{-15}/sqrt[τ].
S. Brewer +14 more
semanticscholar +1 more source
Development of a strontium optical lattice clock for the SOC mission on the ISS [PDF]
, 2016 The ESA mission "Space Optical Clock" project aims at operating an optical lattice clock on the ISS in approximately 2023. The scientific goals of the mission are to perform tests of fundamental physics, to enable space-assisted relativistic geodesy and ...
+28 more
core +4 more sources
Journal of Marine Science and Engineering, 2014 Hurricane Irene caused widespread and significant impacts along the U.S. east coast during 27–29 August 2011. During this period, the storm moved across eastern North Carolina and then tracked northward crossing into Long Island and western New England ...
Alfred M. Klausmann
doaj +1 more source
The GH-IGF-1 Axis in Circadian Rhythm
Frontiers in Molecular Neuroscience, 2021 Organisms have developed common behavioral and physiological adaptations to the influence of the day/night cycle. The CLOCK system forms an internal circadian rhythm in the suprachiasmatic nucleus (SCN) during light/dark input.
Weihao Wang +5 more
doaj +1 more source
All-digital self-adaptive PVTA variation aware clock generation system for DFS [PDF]
, 2014 An all-digital self-adaptive clock generation system capable of adapt the clock frequency to compensate the effects of PVTA variations on the IC propagation delay and satisfy an externally set propagation length condition is presented.
Calomarde Palomino, Antonio +2 more
core +1 more source
A bioinformatic analysis identifies circadian expression of splicing factors and time-dependent alternative splicing events in the HD-MY-Z cell line [PDF]
, 2019 The circadian clock regulates key cellular processes and its dysregulation is associated to several pathologies including cancer. Although the transcriptional regulation of gene expression by the clock machinery is well described, the role of the clock ...
Abreu, Mónica +4 more
core +1 more source
Clinical Profiles of Dengue Infection during an Outbreak in Northern India
Journal of Tropical Medicine, 2016 Introduction. Dengue fever is an arboviral disease, which is transmitted by mosquito vector and presents as varied clinical spectrum of dengue fever (DF), dengue hemorrhagic fever (DHF), dengue shock syndrome (DSS), and expanded dengue syndrome (EDS ...
Anish Laul +5 more
doaj +1 more source