Motivations are critical factors in understanding tourists’ behaviors relation to destination choice; they relate needs, goals, and preferences. Extensive research on this topic has been documented the literature. However, there few empirical studies ecotourist cities mountainous regions that facing an increasing number of challenges due cost infrastructure development. Attention motivational i...

We discuss how matter-enhanced active-sterile neutrino transformation in the νe ⇀↽ νs and ν̄e ⇀↽ ν̄s channels could enable the production of the rapid neutron capture (r-process) nuclei in neutrino-heated supernova ejecta. In this scheme the lightest sterile neutrino would be heavier than the νe and split from it by a vacuum mass-squared difference of 3 eV <∼ δmes <∼ 70 eV with vacuum mixing angl...