Be aware that Windows 8 is still in testing phase and there is always a good chance you're going to experience instability with it. 3rd party companies have not yet had a good amount of time to refine their drivers to compensate for internal changes Microsoft has made to the kernel, so one is bound to start suffering some sort of problem eventually.
In this case, it looks from initial inspection that your Atheros Wireless driver appears to be doing something unscrupulous and Window 8's new DPC watchdog kicked in and caught it, therefore crashing your system. Of course, there's also the possibility that something else is holding it up, but I doubt it. You can still turn on Driver Verifier
and check, though. Do not
select Force Pending I/O Requests, IRP Logging
, and Low Resource Sim
checks. They cause false positives. Though honestly, try and find if you have any new wireless adapter drivers catering specifically for Windows 8.