Time for an update on the Somabay Egyptian Solar Challenge. Scrutineering was due to have begun, but apparently all the cars are still held up in customs. Hopefully the race itself will still start on the 17th. Apparently the route will run north and south along the Red Sea shore for four days, and finish at the Pyramids of Giza on the fifth day.
With luck, we will get some news from mostdece during the race, because the official Twitter and Facebook feeds are not saying much. The following three teams have active news feeds:
Bochum are putting up very detailed daily blog posts (in German) at bosolarcar.de/themen/news. Their local partners from Cairo University are active on Facebook (and, amazingly, auto-translate works well).
This Breton team is active on Facebook and Twitter (click on the icons above).
Nuon is extremely active on Twitter, posting news, pictures, and short videos.
Update 1: apparently the race organisers have no permit to conduct the race as planned. The race will therefore be reduced to a 2-day event, running laps around the Somabay resort complex.
Update 2: Nuon has a report on the event here.
The solar car teams below have said that they intend to race at the Somabay Egyptian Solar Challenge this March. Details of the race are still rather thin on the ground – no route has yet been announced, and there is no official list of teams. There are, however, Twitter and Facebook feeds for the race. Those thinking about participating should probably note the travel advice from Australian, US, Dutch, and French authorities.
This team came 3rd in the Cruiser class at WSC 2015. They also entered three cars in the 2016 ESC, coming 3rd, 4th, and 5th.
This team came 25th in the Challenger class at WSC 2015. They raced in the 2016 ESC, coming 9th.
This is a French (or rather, Breton) team, started in 2008. They raced at ESC in 2014.
This team came 1st in the Challenger class at WSC 2015. They also raced in the 2016 Sasol Solar Challenge in South Africa, coming 1st.
Solar Electric Vehicle – Cairo University Team
This is a local Egyptian team. They are partnering with Bochum, it seems. They are also planning to race at WSC 2017.
This is a local Egyptian team. They are partnering with OSU, it seems. They are also planning to race at WSC 2017.
This post last updated 17:04 on 01 March 2017 AEDT
In 1949, Willard Libby proposed carbon dating, a method for dating carbon-containing objects (like wood, leather, or cloth) that exploits the radioactive decay of carbon-14. The diagram above [redrawn from J. R. Arnold & W. F. Libby, “Age Determinations by Radiocarbon Content: Checks with Samples of Known Age,” Science 110 (2869), 678–680, 23 Dec 1949] shows the decay curve for carbon-14, together with some comparison samples Libby used (including wood dated by tree rings and items from the tomb of Pharaoh Zoser, for whom the first of the pyramids was built). It’s a very good fit! Later tests of carbon-dating have used dendrochronology back to about 10,000 BC.
The carbon in plants contains about one part per trillion of carbon-14, which the plants absorb from the atmosphere. The same amount of carbon-14 is present in animals, which get their carbon by eating plants or other animals. All living things therefore contain about one part per trillion of carbon-14. In dead plants or animals, however, the carbon-14 decays with a half-life of 5,730 years. For practical dating purposes, measurements of carbon-14 are adjusted to match the tree-ring data, so as to compensate for small changes in the amount of atmospheric carbon-14 over time. Such calibrated dates are reported as “Before Present” (BP), where “Present” means 1 January 1950.
One of the most famous examples of carbon-dating has been the Shroud of Turin, purported to be the burial shroud of Jesus Christ, and shown below in a negative image from 1898. The Shroud has been carbon-dated to between 1260 and 1390 AD, which is consistent with its denunciation as a forgery by the Bishop of Troyes in 1389, shortly after it first appeared on the historical scene. For the dating story, see P. E. Damon et al., “Radiocarbon Dating of the Shroud of Turin,” Nature 337 (6208), 611–615, 16 Feb 1989.