I have foud a web page named "Autenthic Happiness" where Martin Seligman (University of Pennsilvania) has developed Positive Psycholoy as a new psychology branch which help you to feel more satisfied and engaged with life. The adress is : Autenthic Happiness.sas.upenn.edu
Another one: -pespmc1.vub.ae.bc/HAPPINESS.
Here, we can read "The evolutionary-cybernetic theory of hapiness".
Maybe, every time we have changed our PC, haven't we?