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This book presents contributions on topics ranging from novel applications of topological analysis for particular problems, through studies of the effectiveness of modern topological methods, algorithmic improvements on existing methods, and parallel computation of topological structures, all the way to mathematical topologies not previously applied to data analysis. Topological methods are broadly recognized as valuable tools for analyzing the ever-increasing flood of data generated by simulation or acquisition. This is particularly the case in scientific visualization, where the data sets have long since surpassed the ability of the human mind to absorb every single byte of data. The biannual TopoInVis workshop has supported researchers in this area for a decade, and continues to serve as a vital forum for the presentation and discussion of novel results in applications in the area, creating a platform to disseminate knowledge about such implementations throughout and beyond the community. The present volume, resulting from the 2015 TopoInVis workshop held in Annweiler, Germany, will appeal to researchers in the fields of scientific visualization and mathematics, domain scientists with an interest in advanced visualization methods, and developers of visualization software systems.
Mathematics. --- Computers. --- Computer graphics. --- Visualization. --- Manifolds (Mathematics). --- Complex manifolds. --- Manifolds and Cell Complexes (incl. Diff.Topology). --- Computing Methodologies. --- Computer Graphics. --- Topology. --- Mathematical analysis. --- Information visualization. --- Data visualization --- Visualization of information --- 517.1 Mathematical analysis --- Mathematical analysis --- Analysis situs --- Position analysis --- Rubber-sheet geometry --- Information science --- Visual analytics --- Geometry --- Polyhedra --- Set theory --- Algebras, Linear --- Cell aggregation --- Artificial intelligence. --- Artificial Intelligence. --- Automatic drafting --- Graphic data processing --- Graphics, Computer --- Computer art --- Graphic arts --- Electronic data processing --- Engineering graphics --- Image processing --- AI (Artificial intelligence) --- Artificial thinking --- Electronic brains --- Intellectronics --- Intelligence, Artificial --- Intelligent machines --- Machine intelligence --- Thinking, Artificial --- Bionics --- Cognitive science --- Digital computer simulation --- Logic machines --- Machine theory --- Self-organizing systems --- Simulation methods --- Fifth generation computers --- Neural computers --- Aggregation, Cell --- Cell patterning --- Cell interaction --- Microbial aggregation --- Visualisation --- Imagination --- Visual perception --- Imagery (Psychology) --- Digital techniques --- Analytic spaces --- Manifolds (Mathematics) --- Geometry, Differential --- Topology --- Math --- Science
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Higher digital connectivity is expected to bring opportunities to leapfrog development in sub-Saharan Africa (SSA). Experience within the region demonstrates that if there is an adequate digital infrastructure and a supportive business environment, new forms of business spring up and create jobs for the educated as well as the less educated. The paper first confirms the global digital divide through the unsupervised machine learning clustering K-means algorithm. Next, it derives a composite digital connectivity index, in the spirit of De Muro-Mazziotta-Pareto, for about 190 economies. Descriptive analysis shows that majority of SSA countries lag in digital connectivity, specifically in infrastructure, internet usage, and knowledge. Finally, using fractional logit regressions we document that better business enabling and regulatory environment, financial access, and urbanization are associated with higher digital connectivity.
Digital communications. --- Communications, Digital --- Digital transmission --- Pulse communication --- Digital electronics --- Pulse techniques (Electronics) --- Telecommunication --- Digital media --- Signal processing --- Digital techniques --- Infrastructure --- Macroeconomics --- Public Finance --- Intelligence (AI) & Semantics --- Demography --- Index Numbers and Aggregation --- leading indicators --- Technological Change: Choices and Consequences --- Diffusion Processes --- Comparative Studies of Countries --- Taxation, Subsidies, and Revenue: General --- Investment --- Capital --- Intangible Capital --- Capacity --- Demographic Economics: General --- Aggregate Factor Income Distribution --- Public finance & taxation --- Population & demography --- Machine learning --- Information technology in revenue administration --- Population and demographics --- Income --- Revenue administration --- National accounts --- Technology --- Revenue --- Saving and investment --- Population --- Cabo Verde
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This book provides a short, hands-on introduction to the science of complexity using simple computational models of natural complex systems-with models and exercises drawn from physics, chemistry, geology, and biology. By working through the models and engaging in additional computational explorations suggested at the end of each chapter, readers very quickly develop an understanding of how complex structures and behaviors can emerge in natural phenomena as diverse as avalanches, forest fires, earthquakes, chemical reactions, animal flocks, and epidemic diseases.Natural Complexity provides the necessary topical background, complete source codes in Python, and detailed explanations for all computational models. Ideal for undergraduates, beginning graduate students, and researchers in the physical and natural sciences, this unique handbook requires no advanced mathematical knowledge or programming skills and is suitable for self-learners with a working knowledge of precalculus and high-school physics.Self-contained and accessible, Natural Complexity enables readers to identify and quantify common underlying structural and dynamical patterns shared by the various systems and phenomena it examines, so that they can form their own answers to the questions of what natural complexity is and how it arises.
Complexity (Philosophy) --- Physics --- Computational complexity. --- Complexity, Computational --- Electronic data processing --- Machine theory --- Philosophy --- Emergence (Philosophy) --- Methodology. --- Burridge-Knopoff stick-slip model. --- Gutenberg-Richter law. --- Johannes Kepler. --- Olami-Feder-Christensen model. --- Python code. --- accretion. --- active flockers. --- agents. --- automobile traffic. --- avalanches. --- cells. --- cellular automata. --- chaos. --- clusters. --- complex behavior. --- complex structure. --- complex system. --- complexity. --- computational model. --- computer program. --- contagious diseases. --- criticality. --- diffusion-limited aggregation. --- earthquake forecasting. --- earthquakes. --- emergence. --- emergent behavior. --- emergent structure. --- epidemic spread. --- epidemic surges. --- excitable system. --- flocking. --- forest fires. --- fractal clusters. --- fractal geometry. --- growth. --- hodgepodge machine. --- infection rate. --- iterated growth. --- lattice. --- lichens. --- natural complex system. --- natural complexity. --- natural order. --- natural phenomena. --- nature. --- open dissipative system. --- panic. --- passive flockers. --- pattern formation. --- percolation threshold. --- percolation. --- phase transition. --- planetary motion. --- power-law. --- random walk. --- randomness. --- repulsion. --- rule-based growth. --- sandpile. --- scale invariance. --- segregation. --- self-organization. --- self-organized criticality. --- self-propulsion. --- self-similarity. --- simple rules. --- small-world network. --- solar flares. --- spaghetti. --- spatiotemporal pattern. --- spiral. --- tagging algorithm. --- traffic jams. --- waves. --- wildfire management.
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A book that challenges everything you thought you knew about the online economyThe internet was supposed to fragment audiences and make media monopolies impossible. Instead, behemoths like Google and Facebook now dominate the time we spend online-and grab all the profits from the attention economy. The Internet Trap explains how this happened. This provocative and timely book sheds light on the stunning rise of the digital giants and the online struggles of nearly everyone else-and reveals what small players can do to survive in a game that is rigged against them.Matthew Hindman shows how seemingly tiny advantages in attracting users can snowball over time. The internet has not reduced the cost of reaching audiences-it has merely shifted who pays and how. Challenging some of the most enduring myths of digital life, Hindman explains why the internet is not the postindustrial technology that has been sold to the public, how it has become mathematically impossible for grad students in a garage to beat Google, and why net neutrality alone is no guarantee of an open internet. He also explains why the challenges for local digital news outlets and other small players are worse than they appear and demonstrates what it really takes to grow a digital audience and stay alive in today's online economy.The Internet Trap shows why, even on the internet, there is still no such thing as a free audience.
Atarazanas. --- University of South Alabama. --- Atarazanas --- United States. --- USA --- Facebook. --- Google. --- Hitwise. --- Internet news. --- Internet users. --- Internet. --- Netflix Prize. --- U.S. television. --- advertising revenue. --- attention economics. --- attention economy. --- bundling. --- comScore. --- communication. --- compounded audience. --- content production. --- digital attention. --- digital audience growth. --- digital audience. --- digital audiences. --- digital economies. --- digital economy. --- digital media. --- economic models. --- economics of scale. --- imaginary Internet. --- imagined Internet. --- journalism. --- local digital news. --- local journalism. --- local news. --- local papers. --- mathematical models. --- media organizations. --- media preferences. --- model building. --- net neutrality. --- news organizations. --- online aggregation. --- online content. --- online dynamics. --- online economy. --- online local news. --- online news. --- power law. --- public policies. --- recommendation systems. --- recommender systems. --- small players. --- stickiness. --- traffic models. --- web measurement. --- web traffic model. --- web traffic. --- web visits. --- Internet --- Economic aspects. --- Political aspects.
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