The Alexander dual of an arbitrary meet-semilattice is described explicitly. Meet-distributive meet-semilattices whose Alexander dual is level are characterized.

leadership studies is a new interdisciplinary field of organization studies that is growing at a steady rate all over the world. leadership studies are seen as a branch of management and organization sciences despite its philosophical roots that can be traced back to plato’s philosophical writings such as laws, politics, or the republic. starting from burns’ seminal book, leadership (1978), and...

Сontrolling the users’ motivation can significantly improve the efficiency and prognostic value of usability studies. The distinction between the extrinsic and intrinsic motivation plays a decisive role in computer-related activities. A well-developed theory of flow experience, introduced by M. Csikszentmihalyi within the school of positive psychology, is intimately related to intrinsic motivat...

In this paper, the definition of meet-continuity on $L$-directedcomplete posets (for short, $L$-dcpos) is introduced. As ageneralization of meet-continuity on crisp dcpos, meet-continuity on$L$-dcpos, based on the generalized Scott topology, ischaracterized. In particular, it is shown that every continuous$L$-dcpo is meet-continuous and $L$-continuous retracts ofmeet-continuous $L$-dcpos are al...