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Prediction of Cascading Failures in Spatial Networks

April 29, 2016 by Complexity Digest   Comments (0)

Cascading overload failures are widely found in large-scale parallel systems and remain a major threat to system reliability; therefore, they are of great concern to maintainers and managers of different systems. Accurate cascading failure prediction can provide useful information to help control networks. However, for a large, gradually growing network with increasing complexity, it is often impractical to explore the behavior of a single node from the perspective of failure propagation....

Efficient network structures with separable heterogeneous connection costs

April 29, 2016 by Complexity Digest   Comments (0)

We provide the analytical solution for the efficient network with heterogeneous, separable connection costs.The efficient network has a diameter no bigger than two and exhibits a core–periphery structure.We calculate the lower bound for clustering coefficient of the efficient network. Efficient network structures with separable heterogeneous connection costs Babak Heydari, Mohsen Mosleh, Kia DaliliEconomics LettersVolume 134, September 2015, Pages...

Merging evolutionary history into species interaction networks

April 29, 2016 by Complexity Digest   Comments (0)

The occurrence of complex networks of interactions among species not only relies on species co-occurrence, but also on inherited traits and evolutionary events imprinted in species phylogenies. The phylogenetic signal found in ecological networks suggests that evolution plays an important role in determining community assembly and hence could inform about the underpinning mechanisms.See it on, via Papers

Spatial Patterns in Urban Systems

April 29, 2016 by Complexity Digest   Comments (0)

Understanding the morphology of an urban system is an important step toward unveiling the dynamical processes of its growth and development. At the foundation of every urban system, transportation system is undeniably a crucial component in powering the life of the entire urban system. In this work, we study the spatial pattern of 73 cities across the globe by analysing the distribution of public transport points within the cities. The analysis reveals that different spatial...

The Unfairness of Housing Purchases Through Time

April 29, 2016 by Institute for New Economic Thinking   Comments (0)

Obviously, the nominal dollar cost of a house or a condo today is much higher than it was 20 or 30 years ago. Indeed, it's even higher than what it was just a couple of years ago. While a number of indices look at the price of housing by deflating the nominal dollar price of a house by the consumer price index (CPI) to measure the rate at which housing prices are rising relative to the general rise in prices of consumer goods, I wish to measure the changes in housing prices in terms of how many...

Utility maximization problem with random endowment and transaction costs: when wealth may become negative. (arXiv:1604.08224v1 [q-fin.MF])

April 28, 2016 by Quantitative Finance at arXiv   Comments (0)

In this paper we study the utility maximization problem on the terminal
wealth with proportional transaction costs and random endowment. Under the
assumption of the existence of consistent price systems, which makes the
duality approach possible, we consider the duality between the primal utility
maximization problem and the dual one, which is set up on the domain of
finitely additive measures. In particular, we prove duality results for utility
functions supporting possibly negative values....

Tech for Hedge Fund Startups: Mistakes to Avoid and Guidance for Success

April 28, 2016 by Eze Castle Integration   Comments (0)

The financial services industry is currently under tremendous pressure to meet both investor and due diligence requirements. Thus, it is increasingly important to maximize technology to meet these pressures. To conclude our six-part hedge fund launch webinar series, we spoke with Eze Castle Integration’s own managing director Vinod Paul, who shared insights about current IT challenges and demands and how today’s hedge funds can employ best practices for operational excellence. Key...

A model to identify urban traffic congestion hotspots in complex networks

April 28, 2016 by Complexity Digest   Comments (0)

Traffic congestion is one of the most notable problems arising in worldwide urban areas, importantly compromising human mobility and air quality. Current technologies to sense real-time data about cities, and its open distribution for analysis, allow the advent of new approaches for improvement and control. Here, we propose an idealized model, the Microscopic Congestion Model, based on the critical phenomena arising in complex networks, that allows to analytically predict congestion hotspots in...

Boundaries of a Complex World (by Andrei Ludu)

April 28, 2016 by Complexity Digest   Comments (0)

The central theme of this book is the extent to which the structure of the free dynamical boundaries of a system controls the evolution of the system as a whole. Applying three orthogonal types of thinking - mathematical, constructivist and morphological, it illustrates these concepts using applications to selected problems from the social and life sciences, as well as economics. In a broader context, it introduces and reviews some modern mathematical approaches to the science of complex...

A World From Dust: How the Periodic Table Shaped Life (by Ben McFarland)

April 28, 2016 by Complexity Digest   Comments (0)

A World From Dust describes how a set of chemical rules combined with the principles of evolution in order to create an environment in which life as we know it could unfold. Beginning with simple mathematics, these predictable rules led to the advent of the planet itself, as well as cells, organs and organelles, ecosystems, and increasingly complex life forms. McFarland provides an accessible discussion of a geological history as well, describing how the inorganic matter on Earth underwent...