We draw attention to network abstraction as a fundamental problem within network analysis and visualization. A combinatorial network abstraction problem is specified by a class P of pattern graphs and a real-valued similarity measure % based on certain graph properties. For fixed P and %, the optimization task on any graph G is finding a subgraph G′ which belongs to P such that %(G,G′) is minim...

A fundamental problem in computational biology is the phylogeny reconstruction for a set of specific organisms. One of the graph theoretical approaches is to construct a similarity graph on the set of organisms where adjacency indicates evolutionary closeness, and then to reconstruct a phylogeny by computing a tree interconnecting the organisms such that leaves in the tree are labeled by the or...

BACKGROUND Research shows evidence for the importance of physical and emotional closeness for the infant, the parent and the infant-parent dyad. Less is known about how, when and why parents experience emotional closeness to their infants in a neonatal unit (NU), which was the aim of this study. METHODS A qualitative study using a salutogenic approach to focus on positive health and wellbeing...

It remains unclear whether social anxiety interferes with the generation of closeness during initial encounters. We addressed the question of whether perceived closeness between strangers differs as a function of dyad characteristics (i.e., self and partner levels of social anxiety) and social context. We conducted an experiment with 90 participants randomly assigned to either a 45-minute perso...

Eigenvectors, and the related centrality measure Bonacich’s c(β), have advantages over graph-theoretic measures like degree, betweenness, and closeness centrality: they can be used in signed and valued graphs and the beta parameter in c(β) permits the calculation of power measures for a wider variety of types of exchange. Degree, betweenness, and closeness centralities are defined only for clas...

We provide a characterization of closeness centrality in the class distance-based centralities. To this end, we introduce natural property, called majority comparison, that states out two adjacent nodes one closer to more is central. prove any satisfies property gives same ranking every graph as centrality. The axiom inspired by interpretation an election which are both voters and candidates th...

In temporal networks, where nodes interact via sequences of temporary events, information or resources can only flow through paths that follow the time ordering of events. Such temporal paths play a crucial role in dynamic processes. However, since networks have so far been usually considered static or quasistatic, the properties of temporal paths are not yet well understood. Building on a defi...

The current study examined the effect of empathy on friendship quality in the context of dyadic same-sex friendships, and how such an effect might be mediated by interpersonal competence. A special version of the actor-partner interdependence model (APIM) was used to examine this hypothesis in 146 same-sex friend dyads in 10th grade. Results showed that empathy was positively related to intimac...

Designing large scale real estate projects often requires collaboration between consultants and agencies that are located in different geographical areas. The added constraint of geographical distance to a design approach that already involves multiple participants makes design collaboration a particularly challenging task. This study hypothesizes that design collaboration could benefit from ha...