Experimental Investigation of Lean Methane-Air Laminar Premixed Flames at Engine-Relevant Temperatures.

Lean premixed combustion is one of the most effective methods to constrain pollutant emissions for modern industrial gas turbines. An experimental study was performed on its propagation speed and internal structure at engine-relevant temperatures. A Bunsen burner was employed for the measurement with an optical schlieren system.

Effectiveness and safety of warm needle acupuncture for sciatica: A protocol for systematic review and meta-analysis.

Background: Sciatica is a syndrome characterized by sciatic nerve path and distribution area pain. Many kinds of literature reported the definite effect of warm needle acupuncture (WNA) on sciatica. However, there is no systematic review or meta-analysis on WNA for sciatica.