linkedin post 2021-01-20 04:43:03
The undervalued window in the archaelogical museum of Girona. It is a masterpiece. View in LinkedIn
linkedin post 2021-01-21 05:41:57
“SPACE WEATHER effects are seen even on ground, as strong currents in the ionosphere can induce currents in long baseline conductor systems on ground. Affected systems include electric power transmission networks, oil and gas pipelines, telecommunication cables and railways systems.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:43:51
POWER GRID OUTAGES. “In power grids, these geomagnetically induced currents cause saturation of transformers, which tends to distort and increase the excitation current. The excitation current in turn induces harmonics in the electricity, unwanted relay trippings, large reactive power consumption, or voltage fluctuations, which can lead to black-outs or to permanent damage of transformers.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:45:58
UNDERGROUND PIPES. “In buried pipelines, geomagnetically induced currents and the associated pipe-to-soil voltages contribute to corrosion and disturb corrosion control surveys and protection systems.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:46:48
TELECOM OUTAGES. “Telecommunication devices may experience overvoltages. As optical fibre cables do not carry induced currents, space weather risks on telecommunication equipment are probably smaller today than they were earlier. However, metal wires are still used in parallel with optical cables for the power to repeat stations.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:48:29
AURORAL PHENOMENA. “The first observations of space weather-associated induced currents were made already in early telegraph systems more than 150 years ago. In general, being related to auroral phenomena, the geomagnetically induced currents are a high-latitude problem, affecting most regions such as the Scandinavian countries, Russia, and Canada.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:49:42
AURORAL QUIRKS. “The amount of induced current in a system is not directly related to the distance to the auroral currents; the ground resistivity and the particular network configuration and its resistances have an important contribution in determining the size of the disturbance. This makes the observed induced current values highly variable from site to site and from system to system.” https://link.springer.com/article/10.12942/lrsp-2007-1 View in LinkedIn
linkedin post 2021-01-21 05:51:42
TURNING THE PAGE. " "“Out, out, brief candle!" "Life's but a walking shadow," "A poor player that struts and frets his hour upon the stage, and then is heard no more:" "it is a tale told by an idiot, full of sound and fury, signifying nothing.”" "WS. Macbeth (c. 1605), Act V, Scene 5, line 23. View in LinkedIn
linkedin post 2021-01-21 05:53:32
The silver birch bark has curious patterning that is not functionally obvious. View in LinkedIn