The vitality of an arc/node of a graph with respect to the maximum flow between two fixed nodes is defined as the reduction of the maximum flow caused by the removal of that arc/node. In this paper we address the issue of determining the vitality of arcs and/or nodes for the network flow problem over various classes of graphs and digraphs. First of all we show how to compute the vitality of all...

The article investigates majority group viewing of minority language media, with a particular focus on examining (a) motivations for viewing, (b) associations between viewing and stereotypes, and (c) the moderating effects of local minority language vitality and direct interpersonal contact. Among Finnish-speaking Finns (the majority group), traditional motivations (e.g., diversion) as well as ...

Generally animal and human cells use oxygen during their whole life. Consequently the oxygen use is a simple indicator to test the vitality of cells. When the vitality decreases by the delivery of toxic substances the decrease can be observed directly by the oxygen-use of the cells. To get fast information of the vitality of cells we have measured the O2-tension by testing a new model of a bior...

Optical vortices are always created or annihilated in pairs with opposite topological charges. However, the presence of such a vortex dipole does not directly indicate whether they are associated with a creation or an annihilation event. Here we propose a method to distinguish between vortex dipoles that have just been created and those that are about to be annihilated. We use first and second ...

CONTEXT The potentially toxic effects of psychopathology and poorly regulated emotion on physical health have long been considered, but less work has addressed whether healthy psychological functioning may also benefit physical health. Emotional vitality--characterized by a sense of energy, positive well-being, and effective emotion regulation--has been hypothesized to reduce risk of heart dise...

introduction: the current study investigated the pulp response to electric pulp testing (ept), before, upon initiation and one month after the start of orthodontic tooth movement. methods and materials: a total of 402 anterior teeth from 39 patients (mean age of 16.8±2.7 years) were examined in this non-controlled prospective study. the aligning forces were administered using initial niti archw...