system
Given the following post, respond as if you're commenting on Reddit:
human
[Stargate] Physics

Matter can travel out only thru a dialed stargate, but "Energy" can travel bidirectionally. This seems to mean non massive particles, or luxons are bidirectional.
If you had a set of transport rings near each stargate, could a person beam straight thru the stargate in reverse? Are they basically energy at that point? 
Or what about an Asgard beam from the other side? Could it beam someone in from the exit? 

Brilliant breach tactic if you ask me.
gpt
Ring transporters still use a matter stream so they couldn't go both ways through an active stargate.

Asgard beaming might be possible, but you have to have rather accurate readings on the location you travel too. Which usually means a ship or Asgard sensors in range, at which point you have travelled there with a ship, so you can beam down from it. 

No point doing riskier transport through the gate.