A dynamic two-sided matching market is considered. We examine two existing notions of stability—the core and recursive core—for this multi-period market and argue that they both have limitations. We define two new notions of stability and label them, self-sustaining stability and strict self-sustaining stability. Both concepts can be viewed as the recursive core with more stringent conditions f...

Romantic relationships alter the selves of the individuals within them. Partners develop shared friends and activities and even overlapping self-concepts. This intertwining of selves may leave individuals' self-concepts vulnerable to change if the relationship ends. The current research examines several different types of self-concept change that could occur after a breakup and their relation t...

We assessed how children's self-concepts of ability for mathematics, English, social, and physical skills activities, ratings of the importance of these activities, and general self-esteem change across the transition to junior high school. Three types of change were assessed: change in mean levels, change in stability, and change in relationships. Twice each year during the sixth and seventh g...

In this dissertation, we study bisimulations and bisimulation-based comparisons in a uniform way for a large class of description logics that extend ALCreg (a variant of propositional dynamic logic) with an arbitrary set of features among I (inverse roles), O (nominals), Q (qualified number restrictions), U (the universal role), Self (local reflexivity of a role) as well as role axioms. We give...