Quantifying long-range correlations in complex networks beyond nearest neighbors

We propose a fluctuation analysis to quantify spatial correlations in complex networks. The approach considers the sequences of degrees along shortest paths in the networks and quantifies the fluctuations in analogy to time series. In this work, the Barabasi-Albert (BA) model, the Cayley tree at the percolation transition, a fractal network model, and examples of real-world networks are studied. While the fluctuation functions for the BA model show exponential decay, in the case of the Cayley tree and the fractal network model the fluctuation functions display a power-law behavior. The fractal network model comprises long-range anti-correlations. The results suggest that the fluctuation exponent provides complementary information to the fractal dimension

German Radioactive Waste

This book presents the universal issue of radioactive waste management from the perspective of the German legal system, analysing how lawmakers have responded to the problem of nuclear waste over the course of the last seventy years. In this book, Robert Rybski unwraps and explains the perplexing legal and social issues related to radioactive waste. He takes readers through the entire ‘life-cycle’: from the moment that radioactive material is classified as radioactive waste, through to the period of interim storage, and right up to its final disposal. However, this last step in radioactive waste management (that of final disposal) has not yet been achieved in Germany, or anywhere in the world, and has been the subject of hefty public debate for dozens of years. As a result, the book analyses the most recent regulations in place to enable final disposal. This book will be of interest to energy policy experts, academics and professionals who work in the area of nuclear energy

German Radioactive Waste

This book presents the universal issue of radioactive waste management from the perspective of the German legal system, analysing how lawmakers have responded to the problem of nuclear waste over the course of the last seventy years. In this book, Robert Rybski unwraps and explains the perplexing legal and social issues related to radioactive waste. He takes readers through the entire ‘life-cycle’: from the moment that radioactive material is classified as radioactive waste, through to the period of interim storage, and right up to its final disposal. However, this last step in radioactive waste management (that of final disposal) has not yet been achieved in Germany, or anywhere in the world, and has been the subject of hefty public debate for dozens of years. As a result, the book analyses the most recent regulations in place to enable final disposal. This book will be of interest to energy policy experts, academics and professionals who work in the area of nuclear energy

Die Erwärmung bodennaher Luftschichten in Zentralasien

Der Beitrag gliedert sich wie folgt: Zunächst wird die Arbeit von Giese/Moßig (2004) zum Klimawandel in Zentralasien aufgegriffen und die Ergebnisse herkömmlicher Verfahren zur Bestimmung der Temperaturentwicklung anhand der vorliegenden Zeitreihen kurz dargestellt (Kapitel 2). Im Anschluss daran wird als erstes Problem die Bestimmung geeigneter Anfangs- und Endzeitpunkte bei der Verwendung von regressionsanalytischen Verfahren aufgezeigt (Kapitel 3). In Kapitel 4 wird das Verfahren der Detrended Fluctuation Analysis (DFA) zunächst ausführlich erläutert und die inhaltliche Aussagekraft der Ergebnisse am Beispiel der Station Karakol dargelegt. Diesbezüglich werden insbesondere die Auswirkungen auftretender Langzeitkorrelationen bei der Analyse von Zeitreihen erörtert. Darauf aufbauend wird eine systematische Anwendung des Verfahrens vorgenommen, um Aussagen über die Stärke erkannter Trends treffen zu können (Kapitel 5). Die Ausführungen schließen in Kapitel 6 mit einer kritischen Zusammenfassung sowie einem Ausblick auf offene Forschungsfragen. --