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How to find the sunrise and sunset times from a Sun clock and calendar
(IOP Publishing Ltd, 2012-03)
The purpose of this article is to describe the construction of a Sun Clock and Calendar (SCandC) that will allow an Observer of it not only to know the time but also the simmetry properties of the Sun-Earth relative movement. ...
Bacterial Infection Disrupts Clock Gene Expression to Attenuate Immune Responses
(Cell Press, 2020-05)
Little is known regarding the mechanisms involved in the clock-immunity crosstalk. de Leone et al. report that the defense mutant eds4 carries a mutation in NUCLEOPORIN205 which affects its circadian function, and that ...
Time to grow: circadian regulation of growth and metabolism in photosynthetic organisms
(Elsevier, 2017-02)
Circadian clocks are molecular devices that help adjust organisms to periodic environmental changes. Although formally described as self-sustaining oscillators that are synchronized by external cues and produce defined ...
Clock watchers and stargazers: Berlin's clocks between science, state and the public sphere at the eighteenth century's end
(Centro de Investigación y Docencia Económicas, División de Historia, 2016)
The sun doesn't shine equally on everyone
(Wiley, 2016-06)
For plants, light is not only a basic energ y staple but also a source ofcrucial environme ntal clues. Plant metabolic and developmentalresponses are exquisitely attuned to variations in light quantity,quality, direction ...
Desarrollo de un seguidor solar automatizado usando un sistema embebido y algoritmo de posicionamiento solar (SPA).
(2022)
The aim of this work is to optimize monitoring of a solar energy collection system through an embedded system and solar positioning algorithm (SPA), for this, Python programming language is employed due to its ease of use ...
On Times and Shadows: The Observational Analemma
(American Association of Physics Teachers, 2018-09)
The observation that the shadows of objects change during the course of the day and also for a fixed time during a year led curious minds to realize that the Sun could be used as a timekeeper. However, the daily motion of ...
The Gaia-ESO survey: the non-universality of the age–chemical-clocks–metallicity relations in the Galactic disc
(European Southern Observatory, 2020)
Context. In the era of large spectroscopic surveys, massive databases of high-quality spectra coupled with the products of the Gaia satellite provide tools to outline a new picture of our Galaxy. In this framework, an ...