S Your new gas furnace may have been installed in one of two. ways, as a direct-vent (2-pipe-Fig. 2) application or as a. non-direct vent (1-pipe-Fig. 3) application. S In a direct-vent (2-pipe) application,your furnace uses air. from outside the home for combustion and ventsflue gas to the. outdoors.
For the biological concept, see Anti-predator adaptation. A defence mechanism is an unconscious psychological mechanism that reduces anxiety arising from unacceptable or potentially harmful stimuli. Sigmund Freud was one of the first proponents of this construct.
George Vaillant described the use of humor as a âmatureâ defense mechanism - a primarily adaptive technique to help us to cope with tense or stressful situations. Looking for a funny aspect in an environment in which we lack control can help us to endure it, and can even be an altruistic act in helping others to better cope as well.