Chicken of the VNC and Ubuntu 14.04 LTS

Upgrading an Ubuntu system to Ubuntu 14.04LTS seems to stop Chicken of the VNC working for remote desktop access, even after the Ubuntu system has been configured in the normal way to allow remote desktop access. To fix this, install dconf-tools:

sudo apt-get install dconf-tools

Then, run dconf-editor and change the org/gnome/desktop/remote-access/require-encryption to off so that it looks something like this:

dconfThat seems to fix it, although at the expense of requiring encryption.

The brain and parallel processing

Interesting story here about what parallel resources the brain musters to perform simple tasks. It suggests that trying to build a functional brain-analog by simulating individual neurons is unnecessary. Instead, a much more practical silicon implementation would come from understanding the aggregate behavior of groups of neurons and simulating that instead. Not a new idea but it’s interesting to see an attempt to start to understand how this might work.

Continue reading “The brain and parallel processing”

A global quantum internet?

Interesting paper here describing a potential system for creating caches of quantum entangled photon pairs separated by very large distances. It wasn’t all that long ago that the concept of entanglement seemed like science fiction and, in any case, entanglement was so fragile that things de-cohered in a very short space of time. Now it seems like it may be possible to store widely separated entangled pairs for at least long enough (> 67mS) to be useful for things like quantum key distribution.