Large Social Networks can be Targeted for Viral Marketing with Small Seed Sets

In a "tipping" model, each node in a social network, representing an individual, adopts a behavior if a certain number of his incoming neighbors previously held that property. A key problem for viral marketers is to determine an initial "seed" set in a network such that if given a property then the entire network adopts the behavior. Here we introduce a method for quickly finding seed sets that scales to very large networks. Our approach finds a set of nodes that guarantees spreading to the entire network under the tipping model. After experimentally evaluating 31 real-world networks, we found that our approach often finds such sets that are several orders of magnitude smaller than the population size. Our approach also scales well - on a Friendster social network consisting of 5.6 million nodes and 28 million edges we found a seed sets in under 3.6 hours. We also find that highly clustered local neighborhoods and dense network-wide community structure together suppress the ability of a trend to spread under the tipping model

Projection Methods for some Constrained Systems

This article is concerned with a geometric tool given by a pair of projector operators defined by almost product structures on finite dimensional manifolds, polarized by a distribution of constant rank and also endowed with some geometric structures (Riemann,resp.Poisson,resp.symplectic).The work is motivated by non-holonomic and sub-Riemannian geometry of mechanical systems on finite dimensional manifolds.Two examples are given

The influence of brand effect on slogan‘s memorability

Purpose: The main aim of this article is to examine the influence of consumers’ brand effect on their ability to remember brand slogans. Design/Methodology/Approach: An empirical quantitative study was carried out via an online questionnaire, analyzing 370 real costumers of three telecom B2C service providers in Portugal. Findings: The results tend to indicate to not corroborate the positive influence of brand effect on brand slogan memorability. However, it was also found evidence to raise doubts on the absence of the relationships, since some components of brand effect had a positive impact on slogan recognition in some of the brands studied. Practical implications: Brands might consider focusing on other dimensions besides brand effect, if their aim is to increase brand and slogan awareness. However, since some contradictory results were verified, managers should not view that implication as a golden rule for management and branding decisions. Originality/Value: The main contribution of this study is to shed a light on a relation not yet sufficiently explored in previous studies related to slogan’s effectiveness.peer-reviewe

G-structures and duality

Imperial Users onl