Many urban settlements result from a spatially distributed, decentralized building process. Here we analyze the topological patterns of organization of a large collection of such settlements using the approach of complex networks. The global efficiency (based on the inverse of shortest-path lengths), robustness to disconnections and cost (in terms of length) of these graphs is studied and their...

Perspectives Attaining universal and equitable access to safe and affordable drinking water for all by 2030 (sustainable development goal 6) 1 will be a major challenge, particularly in urban slum communities. In 2012, over 860 million people – about a third of the urban population of developing countries – were living in slums. 2 The primary barriers to accessing water in slums are not solely ...

Reductions in hunter-gatherer mobility during the Late Pleistocene influenced settlement ecologies, altered human relations with animal communities, and played a pivotal role in domestication. The influence of variability in human mobility on selection dynamics and ecological interactions in human settlements has not been extensively explored, however. This study of mice in modern African villa...

I. Conceptual studies of market liquidity Dupont, D " The effects of transaction costs on depth and spread " Gravelle, T " The market microstructure of dealership equity and government securities markets: how they differ " Muranaga, J and Shimizu, T " Market microstructure and market liquidity " Ui, T " Transparency and liquidity in securities markets " II. Empirical studies of market liquidity...

Intellectual property rights are widely recognized as critical assets in many industries, especially “high-tech” industries. Companies like IBM, Intel, and Hewlett-Packard regard their patents and copyrights, along with their other intangible assets such as know-how, as central elements giving them competitive advantage. Likewise, many software companies, from Microsoft to software startups see...