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In 1961, Martin et al. first suggested that H + 3 may be present in interstellar space given the large amount of hydrogen in interstellar space and its reaction pathway was exothermic (~1.5 eV). [3] This led to the suggestion of Watson and Herbst & Klemperer in 1973 that H + 3 is responsible for the formation of many observed molecular ions.
This is also known as execute around [1] or a code sandwich, and occurs in various other contexts, [2] such as a temporary change of program state, or tracing entry and exit into a subroutine. However, resource management is the most commonly cited application. In aspect-oriented programming, such execute around logic is a form of advice.