NEWS #latest

Open call - CLOSED

2017/01/23  |  projects

PhD open call, Network Science

We welcome applications for a three-year PhD position within our program of Complex Networks at UB. The gross annual pay is 16.400€ approx.. 

Eligibility Criteria

Candidates must have:

* a Master’s degree at the time of incorporation,

* a strong physics, mathematics and/or computer science background,

* a keen interest in developing and applying computational techniques to real systems from a Network Science perspective,

* an interest in working with real data,

* proved programming skills,

* fluency in spoken and written English.


To apply and for questions, you must send an email to Prof. M. Ángeles Serrano at marian.serrano@ub.edu indicating in the subject of the message “PhD-NS call “+ name surname of the candidate. The application package should include CV and a motivation letter. Selected candidates should be available for interviews (possibly via Skype) and practical tests.



World Trade Atlas 1870-2013

2015/11/06  |  academic

Rethinking distance in international trade. World Trade Atlas 1870-2013 

We introduce the World Trade Atlas 1870-2013, a collection of annual World Trade Maps where distance integrates the different dimensions affecting international trade beyond geography. The Atlas informs us about the long-run evolution of the international trade system and shows that, in terms of trade, the world is not flat, it is hyperbolic. The departure from flatness has been increasing since World War I, meaning that differences in trade distances are growing and becoming more hierarchical.Small economies are moving away from the rest of the world, except for their trade with the big economies, while big economies are increasing their chance of getting world-wide connected. At the same time, Preferential Trade Arrangements are not in perfect agreement to natural communities on trade space and have not necessarily effected an internal reduction of trade barriers. We discuss an interpretation in terms of globalization, hierarchicalization, and localization, three forces acting simultaneously to shape the international trade system. Watch the evolution of world trade with this interactive video tool World Trade Atlas 1870-2013



New paper in Scientific Reports

2015/02/22  |  academic

Regulation of burstiness by network-driven activation

We prove that complex networks of interactions have the capacity to regulate and buffer unpredictable fluctuations in production events. We show that non-bursty network-driven activation dynamics can effectively regulate the level of burstiness in the production of nodes, which can be enhanced or reduced. Burstiness can be induced even when the endogenous inter-event time distribution of nodes’ production is non-bursty. We find that hubs tend to be less susceptible to the networked regulatory effects than low degree nodes. Our results have important implications for the analysis and engineering of bursty activity in a range of systems, from communication networks to transcription and translation of genes into proteins in cells.



Open call - CLOSED

2015/03/01  |  projects

Post-doctoral research associate position in complex networks at the University of Barcelona

MAPPING COMPLEXITY PROJECT

We invite applications for a Post-Doctoral Research Associate (1+1 years) in Network Science-Mapping Complexity at the University of Barcelona (Spain). The successful candidate will be required to join us in the investigation of complex networks embedded in hidden metric spaces to get insights into the connection between the structure and function in biological complex systems.

The position is funded by the grant "Mapping complexity: Embedding networks in hidden metric spaces" awarded by the James S. McDonnell Foundation 21st Century Science Initiative in Studying Complex Systems – Scholar Award, 2013.

We are seeking interested researchers with a PhD in Biological Sciences, Physics, Computer Science, or related fields, and proved computational/mathematical background. Experience in the investigations of Biological Systems is mandatory. We especially encourage women researchers to apply for the position.

Candidates can email a detailed CV together with an expression of interest to Dr. M. Ángeles Serrano, indicating "Mapping complexity PostDoc application" in the subject. Pre-selected candidates will be appointed for a personal interview and/or test assignments if necessary, and will be asked for one reference letter. Applications will be considered until the vacancy has been filled.

Contacts for any additional information:
Dr. M. Ángeles Serrano
Dr. Marián Boguñá



New paper in New Journal of Physics

2015/06/16  |  academic

Escaping the avalanche collapse in self-similar multiplexes

We deduce and discuss the implications of self-similarity for the robustness to failure of multiplexes, depending on interlayer degree correlations. First, we define self-similarity of multiplexes and we illustrate the concept in practice using the configuration model ensemble. Circumscribing robustness to survival of the mutually percolated state, we find a new explanation based on self-similarity both for the observed fragility of interconnected systems of networks and for their robustness to failure when interlayer degree correlations are present. Extending the self-similarity arguments, we show that interlayer degree correlations can change completely the global connectivity properties of self-similar multiplexes, so that they can even recover a zero percolation threshold and a continuous transition in the thermodynamic limit, qualitatively exhibiting thus the ordinary percolation properties of noninteracting networks. We confirm these results with numerical simulations.