The first mechanism suggests hydrogen (H) atoms each associate with only oxygen (O) atoms to produce only OH species on the surface. (sciencedaily.com)
The first mechanism is Tit for Tat, or direct reciprocity — «I will if you will» — which represented the first outbreak of cooperation in the prisoner's dilemma simulation. (discovermagazine.com)
«Why space dust emits radio waves upon crashing into a spacecraft: A new simulation provides the first mechanism to explain why plasma from hypervelocity impacts generates electromagnetic radiation.» (sciencedaily.com)