point

 

 Remember me

Register  |   Lost password?


Introduction to QuantLib Development - Intensive 3-day Training Course - September 10-12th, 2018 - Download Registration Form Here

 

Complexity Digest's Blog

Complexity Digest Blog Header

Cognitive mechanisms for human flocking dynamics

September 22, 2018 Comments (0)

Low-level “adaptive” and higher-level “sophisticated” human reasoning processes have been proposed to play opposing roles in the emergence of unpredictable collective behaviors such as crowd panics, traffic jams, and market bubbles. While adaptive processes are widely recognized drivers of emergent social complexity, complementary theories of sophistication predict that incentives, education, and other inducements to rationality will suppress it. We show in a series of multiplayer laboratory...

Zipf’s and Taylor’s laws

September 20, 2018 Comments (0)

Zipf’s law states that the frequency of an observation with a given value is inversely proportional to the square of that value; Taylor’s law, instead, describes the scaling between fluctuations in the size of a population and its mean. Empirical evidence of the validity of these laws has been found in many and diverse domains. Despite the numerous models proposed to explain the presence of Zipf’s law, there is no consensus on how it originates from a microscopic process of...

Two postdoctoral positions in computational social science at the Network Science Institute

September 19, 2018 Comments (0)

Two postdoctoral positions in computational social science are available at the Network Science Institute, to work with David Lazer and Christoph Riedl. Candidates will be expected to work on a combination of their own research and collaborative projects within the institute. Source: christophriedl.net

Measuring accessibility using gravity and radiation models

September 18, 2018 Comments (0)

Since the presentation of the radiation model, much work has been done to compare its findings with those obtained from gravitational models. These comparisons always aim at measuring the accuracy with which the models reproduce the mobility described by origin–destination matrices. This has been done at different spatial scales using different datasets, and several versions of the models have been proposed to adjust to various spatial systems. However, the models, to our knowledge, have never...

Criticality distinguishes the ensemble of biological regulatory networks

September 17, 2018 Comments (0)

The hypothesis many living systems should exhibit near-critical behavior is well-motivated theoretically, and an increasing number of cases have been demonstrated empirically. However, a systematic analysis across biological networks, which would enable identification of the network properties that drive criticality, has not yet been realized. Here, we provide a first comprehensive survey of criticality across a diverse sample of biological networks, leveraging a publicly available database of...

Physical foundations of biological complexity

September 16, 2018 Comments (0)

Living organisms are characterized by a degree of hierarchical complexity that appears to be inaccessible to even the most complex inanimate objects. Routes and patterns of the evolution of complexity are poorly understood. We propose a general conceptual framework for emergence of complexity through competing interactions and frustrated states similar to those that yield patterns in striped glasses and cause self-organized criticality. We show that biological evolution is replete with...

Gaia 2.0

September 15, 2018 Comments (0)

According to Lovelock and Margulis’s Gaia hypothesis, living things are part of a planetary-scale self-regulating system that has maintained habitable conditions for the past 3.5 billion years (1, 2). Gaia has operated without foresight or planning on the part of organisms, but the evolution of humans and their technology are changing that. Earth has now entered a new epoch called the Anthropocene (3), and humans are beginning to become aware of the global consequences of their actions....

Closed Loophole Confirms the Unreality of the Quantum World

September 14, 2018 Comments (0)

After researchers found a loophole in a famous experiment designed to prove that quantum objects don’t have intrinsic properties, three experimental groups quickly sewed the loophole shut. The episode closes the door on many “hidden variable” theories. Source: www.quantamagazine.org

What has and hasn’t changed since the global financial crisis?

September 12, 2018 Comments (0)

The world economy has returned to robust growth after the 2008 global financial crisis. But some familiar risks are creeping back, and new ones have emerged. Source: www.mckinsey.com

Physics of humans, physics for society

September 12, 2018 Comments (0)

Today, the massive use of information and communication technologies (ICT) has made it possible to attach a traceable set of data to almost any person. We argue that these data provide the opportunity to build a ‘physics of society’: describing a society — composed of many interacting heterogeneous entities (people, businesses, institutions) — as a physical system. While important ethical implications have to be taken into account, the benefits in developing such physics of society would be...