The human brain has been studied at multiple scales, from neurons, circuits, areas with well-defined anatomical and functional boundaries, to large-scale functional networks which mediate coherent cognition. In a recent work, we addressed the problem of the hierarchical organization in the brain through network analysis. Our analysis identified functional brain modules of fractal structure that...

This chapter offers a theory and method for the analysis of the dynamics, i.e. the development, of clusters for innovation. It employs an analysis of three types of embedding: institutional embedding, which is often localized, structural embedding (network structure), and relational embedding (type and strength of ties). The analysis is conducted from a perspective of both competence (learning)...

Quantum theory concepts of correlated history and decoherence explain the emergence of structure (coarse-graining) out of fine-grained entanglement fields. Entanglement occurs when each quanta is somewhat correlated, over time, with all other quanta. Entanglement ties are proposed as alternatives to sociologists’ weak and strong ties. Entanglement fields provide neutral starting points for effi...

Bartlett et al (2006) recently proved that a ground condition for convex surrogates, classification calibration, ties up the minimization of the surrogates and classification risks, and left as an important problem the algorithmic questions about the minimization of these surrogates. In this paper, we propose an algorithm which provably minimizes any classification calibrated surrogate strictly...

The ability to rewire ties in communication networks is vital for large-scale human cooperation and the spread of new ideas. We show that lack researcher co-location during COVID-19 lockdown caused loss more than 4,800 weak -- between distant parts social system enable flow novel information over 18 months email network a large North American university. Furthermore, we find re-introduction par...

External network ties between CEOs and directors in major U.S. corporations may limit the e¤ectiveness of internal corporate governance. Using comprehensive biographical data on the managers and directors of S&P 1500 companies, we identify connections between directors and their …rms’CEOs through external directorships, past employment, education, and other activities (e.g. golf clubs or charit...

This paper, based on a Multipurpose survey on a large national sample of Italian households which has made possible to analyse parent-child and grandparent-child dyads, explores the impact of marital instability on relationships with adult children and with grandchildren. As in other countries, the impact is more negative in the case of divorce than in case of widowhood and, in both cases, more...

Disentangling the effects of weak ties on creativity, the present study separated, both theoretically and empirically, the effects of the size and strength of actors' idea networks and examined their joint impact while simultaneously considering the separate, moderating role of network diversity. I hypothesized that idea networks of optimal size and weak strength were more likely to boost creat...