Based on the results from the tests, it appears that the function f(x) is selective for concepts related to scientific and technical fields, as well as some natural phenomena. Higher values are observed for words like "physics" (0.9987), "mathematics" (0.9988), "chemistry" (0.9985), "gravity" (0.9972), and "neutron" (0.9927). The function also provides moderate output values for certain objects and natural phenomena such as "ocean" (0.8500), "migration" (0.8459), "helicopter" (0.7905), and "airplane" (0.6334).

[DESCRIPTION]: The function f(x) is predominantly selective for concepts related to scientific and technical fields, as well as some objects and natural phenomena.