Archive

Archive for June, 2018

https://belowthesurface.amsterdam/en/vondsten Digging out the Noord Zuid Lijn and finding stuff.

June 29, 2018 Leave a comment

(I presume this also applies to the minimum size of an interstellar colony)

June 12, 2018 Leave a comment

(I presume this also applies to the minimum size of an interstellar colony)
Computing the minimal crew for a multi-generational space travel towards Proxima Centauri b

The survival of a genetically healthy multi-generational crew is of a prime concern when dealing with space travel.

It has been shown that determining a realistic population size is tricky as many parameters (such as infertility, inbreeding, sudden deaths, accidents or random events) come into play. To evaluate the impact of those parameters, Monte Carlo simulations are among the best methods since they allow testing of all possible scenarios and determine, by numerous iterations, which are the most likely.

This is why we use the Monte Carlo code HERITAGE to estimate the minimal crew for a multi-generational space travel towards Proxima Centauri b. By allowing the crew to evolve under a list of adaptive social engineering principles (namely yearly evaluations of the vessel population, offspring restrictions and breeding constraints), we show in this paper that it is possible to create and maintain a healthy population virtually indefinitely.

A initial amount of 25 breeding pairs of settlers drives the mission towards extinction in 50 +/- 15% of cases if we completely forbid inbreeding. Under the set of parameters described in this publication, we find that a minimum crew of 98 people is necessary ensure a 100% success rate for a 6300-year space travel towards the closest telluric exoplanet known so far.

https://arxiv.org/abs/1806.03856

This won’t be news to anyone I expect, but there is no effective upper limit to how complex you can make a historical trading system if you want to.

June 6, 2018 Leave a comment


This won’t be news to anyone I expect, but there is no effective upper limit to how complex you can make a historical trading system if you want to.