Graphene: (Latest) Miracle Material


NY Times has a gushing article about the wonders of grapheme:

  • graphene was discovered to be 200 times stronger than steel
  • so thin that a single ounce of it could cover 28 football fields
  • transparent
  • conductive
  • flexible
  • light: A cubic inch of the material could balance on one blade of grass
  • graphene could stretch by 20 percent while still remaining able to conduct electricity. Rubber stretches by 20%
  • graphene is inexpensive

Updating an AWS instance and wordpress multisite hostname

Just in case you haven’t heard about heartbleed or like comic strip explanation. Bruce Schneier has a good run down on how screwed we all are including this link to the logs of a possible exploit half a year ago.
So I figured I better update my server. First off, I’m using an AWS instance to host the web site. I’m both proud and embarrassed. The system has been up for 11 months.

$ uptime
 11:22:33 up 339 days,  9:34,  1 user,  load average: 0.14, 0.84, 0.84

Updating the software was fairly easy

sudo apt-get update {.sh}
sudo apt-get upgrade
sudo apt-get dist-upgrade

But it pretty much required a reboot to make sure everything was using the new libraries.
After that was done my wordpress installation was using the wrong hostname. Here are the tables I updated. The id, blog_id and table name wp_options are somewhat specific to my installation.

update wp_sitemeta set meta_value = '' where meta_key = 'siteurl';
update wp_site set domain = '' where id = 1;
update wp_blogs set domain = '' where blog_id = 1;
update wp_options set option_value = '' where option_name = 'siteurl';
update wp_options set option_value = '' where option_name = 'home';

Solar System to Scale

If the Moon Were Only 1 Pixel A tediously accurate map of the solar system

In line with an earlier post talking about the the scale of the solar system checkout if the moon were 1 pixel gives you a visceral feel for the size of the solar system.   I only made it out to Saturn.  It took a long, long time to scroll.
It makes you imagine how long an interplanetary trip would take.  There is a lot of nothing. It was so boring just scrolling for a few minutes. Just black. No air.

  • Traveling from Earth to Mars would take about seven months.  
  • Earth is at 150M km;
  • Mars is at 225M km.
  • Jupiter is a 13 month trip and is at the kilometer marker 750M. No rest stops.