Demonstration is the last time the technology is tested before commercial scale Deployment and usually involves construction and operation of demonstration plant. Since such a plant tends to be ...expensive to build and run, it is essential to have identified which specific elements of the new process need to be proven, under which operating conditions, and for how long. ...the Sun delivers in one hour the same amount of energy we currently use in a year. ...there are challenges relating to solar energy. ...many of the regions of the world with high levels of insolation are remote from the main centres of population where the energy is required. ...these are as much engineering challenges as biological. ...a multi‐disciplinary approach is required: it is essential that the biologists, electrochemists and engineers speak together at an early stage – and that they develop the vocabulary to facilitate such discussions.
Much of my work is concerned with the energy transition to low‐carbon and renewable energy sources. Photosynthesis not only provides a mechanism to capture solar energy in molecular form, but also ...generates molecular building blocks for future bio‐manufacturing industries. ...intimacy also stimulates the innovation that is required to tackle one of the main global challenges facing mankind.
During the British Astronomical Association (BAA) 2022 campaign, 27,436 photometric observations of the dwarf nova (DN) CG Draconis were made, with 106 eclipses recorded. This work summarizes the new ...data available and provides updated ephemeris and commentary on the observed eclipse profiles. The orbital period found is Porb=4h31m38s±1s$$ {P}_{orb}={4}^{\mathrm{h}}{31}^{\mathrm{m}}{38}^{\mathrm{s}}\pm {1}^{\mathrm{s}} $$. Two types of quasi‐periodic outbursts are identified: normal outbursts, of ΔV≈1.25$$ \Delta V\approx 1.25 $$ mag amplitude, and bright, of ΔV≈1.5$$ \Delta V\approx 1.5 $$ mag. The pattern resembles superoutbursts of SU UMa‐type DNe, however, no presence of superhumps characterizing these DNe was found. Given CG Dra is located above the period gap, it may represent a new intermediary subtype between SS Cyg and SU UMa‐type stars, or provide support to superoutburst models that do not rely on eccentric accretion disks.
The BAA goes digital Shears, Jeremy
Astronomy & geophysics : the journal of the Royal Astronomical Society,
04/2018, Letnik:
59, Številka:
2
Journal Article
Recenzirano
Jeremy Shears on what the British Astronomical Association can offer.
Jeremy Shears on what the British Astronomical Association can offer, including a new and cheaper digital subscription.
Jeremy Shears considers the life and work of Mary Adela Blagg.
Mary Adela Blagg made a significant contribution to standardizing lunar nomenclature and to the analysis of the light curves of variable ...stars. Jeremy Shears considers her life and work.
Frederick William Longbottom FRAS (1850-1933) was an Original Member of the BAA and served as Director of its Photographic Section between 1906 and 1926. A hop merchant by trade, he spent much of his ...life in Chester, where he was instrumental in founding the city's first astronomical society in 1892.
Dr Thomas David Anderson (1853-1932) was a Scottish amateur astronomer best known for his discovery of two bright novae: Nova Aurigae 1891 and Nova Persei 1901. He also discovered more than 50 ...variable stars as well as making independent discoveries of Nova Aquilae 1918 and comet 17P/Holmes in 1892. At the age of seventy, in 1923, he reported his discovery of a further nova, this time in Cygnus. This was set to be the culmination of a lifetime devoted to scanning the night sky, but unfortunately no one was able to confirm it. This paper discusses Anderson's life leading up to the discovery and considers whether the object was likely to have been real or illusory.
John Ellard Gore FRAS, MRIA (1845-1910) was an Irish amateur astronomer and prolific author of popular astronomy books. His main observational interest was variable stars, of which he discovered ...several, and he served as the first Director of the BAA Variable Star Section. He was also interested in binary stars, leading him to calculate the orbital elements of many such systems. He demonstrated that the companion of Sirius, thought by many to be a dark body, was in fact self-luminous. In doing so he provided the first indication of the enormous density of what later became known as white dwarfs.
E. E. Markwick, CB, CBE, FRAS (1853-1925) pursued a distinguished career in the British Army, serving in Great Britain and other parts of the Empire and rising to the rank of Colonel. He was an ...original member of the BAA and President between 1912 and 1914. His main observational interest was the study of variable stars, and he independently discovered two variables, RY Sgr and T Cen. He directed the BAA Variable Star Section from 1899 to 1909, organising its work along lines that are largely pursued even to this day and which other variable star organisations around the world have emulated.
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