Several objects exhibit collaborative behavior if they act together in answering a message they have received jointly. Collaborative behavior is deened by cooperation contracts which are established between several object classes and which declare a set of cooperative methods. A cooperative method is invoked by a cooperative message sent to a tuple of instances, one for each object class in the...

This paper is concerned with front-like entire solutions for monostable reactiondiffusion systems with cooperative and non-cooperative nonlinearities. In the cooperative case, the existence and asymptotic behavior of spatially independent solutions (SIS) are first proved. Combining a SIS and traveling fronts with different wave speeds and directions, the existence and various qualitative proper...

Successful navigation of our complex social world requires the capability to recognize and judge the relative status of others. Hence, social comparison processes are of great importance in our interactions, informing us of our relative standing and in turn potentially motivating our behavior. However, so far few studies have examined in detail how social comparison can influence interpersonal ...