@article{ŚlęzakBurneckiMetzler2019, author = {Ślęzak, Jakub and Burnecki, Krzysztof and Metzler, Ralf}, title = {Random coefficient autoregressive processes describe Brownian yet non-Gaussian diffusion in heterogeneous systems}, series = {New Journal of Physics}, volume = {21}, journal = {New Journal of Physics}, publisher = {Deutsche Physikalische Gesellschaft ; IOP, Institute of Physics}, address = {Bad Honnef und London}, issn = {1367-2630}, doi = {10.1088/1367-2630/ab3366}, pages = {18}, year = {2019}, abstract = {Many studies on biological and soft matter systems report the joint presence of a linear mean-squared displacement and a non-Gaussian probability density exhibiting, for instance, exponential or stretched-Gaussian tails. This phenomenon is ascribed to the heterogeneity of the medium and is captured by random parameter models such as 'superstatistics' or 'diffusing diffusivity'. Independently, scientists working in the area of time series analysis and statistics have studied a class of discrete-time processes with similar properties, namely, random coefficient autoregressive models. In this work we try to reconcile these two approaches and thus provide a bridge between physical stochastic processes and autoregressive models.Westart from the basic Langevin equation of motion with time-varying damping or diffusion coefficients and establish the link to random coefficient autoregressive processes. By exploring that link we gain access to efficient statistical methods which can help to identify data exhibiting Brownian yet non-Gaussian diffusion.}, language = {en} } @article{ŚlęzakMetzlerMagdziarz2018, author = {Ślęzak, Jakub and Metzler, Ralf and Magdziarz, Marcin}, title = {Superstatistical generalised Langevin equation}, series = {New Journal of Physics}, volume = {20}, journal = {New Journal of Physics}, number = {023026}, publisher = {Deutsche Physikalische Gesellschaft / Institute of Physics}, address = {Bad Honnef und London}, issn = {1367-2630}, doi = {10.1088/1367-2630/aaa3d4}, pages = {1 -- 25}, year = {2018}, abstract = {Recent advances in single particle tracking and supercomputing techniques demonstrate the emergence of normal or anomalous, viscoelastic diffusion in conjunction with non-Gaussian distributions in soft, biological, and active matter systems. We here formulate a stochastic model based on a generalised Langevin equation in which non-Gaussian shapes of the probability density function and normal or anomalous diffusion have a common origin, namely a random parametrisation of the stochastic force. We perform a detailed analysis demonstrating how various types of parameter distributions for the memory kernel result in exponential, power law, or power-log law tails of the memory functions. The studied system is also shown to exhibit a further unusual property: the velocity has a Gaussian one point probability density but non-Gaussian joint distributions. This behaviour is reflected in the relaxation from a Gaussian to a non-Gaussian distribution observed for the position variable. We show that our theoretical results are in excellent agreement with stochastic simulations.}, language = {en} } @article{ŚlęzakMetzlerMagdziarz2019, author = {Ślęzak, Jakub and Metzler, Ralf and Magdziarz, Marcin}, title = {Codifference can detect ergodicity breaking and non-Gaussianity}, series = {New Journal of Physics}, volume = {21}, journal = {New Journal of Physics}, publisher = {Deutsche Physikalische Gesellschaft}, address = {Bad Honnef}, issn = {1367-2630}, doi = {10.1088/1367-2630/ab13f3}, pages = {25}, year = {2019}, abstract = {We show that the codifference is a useful tool in studying the ergodicity breaking and non-Gaussianity properties of stochastic time series. While the codifference is a measure of dependence that was previously studied mainly in the context of stable processes, we here extend its range of applicability to random-parameter and diffusing-diffusivity models which are important in contemporary physics, biology and financial engineering. We prove that the codifference detects forms of dependence and ergodicity breaking which are not visible from analysing the covariance and correlation functions. We also discuss a related measure of dispersion, which is a nonlinear analogue of the mean squared displacement.}, language = {en} } @misc{Şener2017, author = {Şener, Ula{\c{s}}}, title = {Rodrik, Dani (2015): Economics Rules: The Rights and Wrongs of the Dismal Science / rezensiert von Ula{\c{s}} Şener}, series = {European journal of economics and economic policies : intervention ; EJEEP}, volume = {14}, journal = {European journal of economics and economic policies : intervention ; EJEEP}, publisher = {Elgar}, address = {Cheltenham}, issn = {2052-7764}, doi = {10.4337/ejeep.2017.03.08}, pages = {375 -- 377}, year = {2017}, language = {en} } @article{ŠedovaKalkuhl2020, author = {Šedov{\´a}, Barbora and Kalkuhl, Matthias}, title = {Who are the climate migrants and where do they go?}, series = {World development}, volume = {129}, journal = {World development}, publisher = {Elsevier Science}, address = {Amsterdam}, issn = {0305-750X}, doi = {10.1016/j.worlddev.2019.104848}, pages = {19}, year = {2020}, abstract = {In this paper, we move from the large strand of research that looks at evidence of climate migration to the questions: who are the climate migrants? and where do they go? These questions are crucial to design policies that mitigate welfare losses of migration choices due to climate change. We study the direct and heterogeneous associations between weather extremes and migration in rural India. We combine ERAS reanalysis data with the India Human Development Survey household panel and conduct regression analyses by applying linear probability and multinomial logit models. This enables us to establish a causal relationship between temperature and precipitation anomalies and overall migration as well as migration by destination. We show that adverse weather shocks decrease rural-rural and international migration and push people into cities in different, presumably more prosperous states. A series of positive weather shocks, however, facilitates international migration and migration to cities within the same state. Further, our results indicate that in contrast to other migrants, climate migrants are likely to be from the lower end of the skill distribution and from households strongly dependent on agricultural production. We estimate that approximately 8\% of all rural-urban moves between 2005 and 2012 can be attributed to weather. This figure might increase as a consequence of climate change. Thus, a key policy recommendation is to take steps to facilitate integration of less educated migrants into the urban labor market.}, language = {en} } @book{OPUS4-50023, title = {Local Integration of Migrants Policy}, series = {Palgrave Studies in Sub-National Governance}, journal = {Palgrave Studies in Sub-National Governance}, editor = {Franzke, Jochen and de la Fuente, Jos{\´e} M. Ruano}, publisher = {Palgrave Macmillan}, address = {Cham}, isbn = {978-3-030-50979-8}, issn = {2523-8256}, doi = {10.1007/978-3-030-50979-8}, pages = {XXV, 350}, year = {2021}, abstract = {This book presents an overview of European migration policy and the various institutional arrangements within and between various actors, such as local councils, local media, local economies, and local civil society initiatives. Both the role of local authorities in this policy field and their cooperation with civil society initiatives or networks are under-explored topics for research. In response, this book provides a range of detailed case studies focusing on the six main groups of national and administrative traditions in Europe: Germanic, Scandinavian, Napoleonic, Southeastern European, Central-Eastern European and Anglo-Saxon.}, language = {en} } @book{OPUS4-50028, title = {The First World War as a Caesura?}, series = {Gewaltpolitik und Menschenrechte ; 3}, journal = {Gewaltpolitik und Menschenrechte ; 3}, editor = {Pschichholz, Christin}, publisher = {Duncker \& Humblot}, address = {Berlin}, isbn = {978-3-428-18146-9}, pages = {247}, year = {2020}, abstract = {During the phases of mobile warfare, the ethnically and religiously very heterogeneous population in the border regions of the multi-ethnic empires suffered in particular. Even if the real military situation in the course of the war hardly gave cause for concern, the image of disloyal ethnic and national minorities was widespread. This was particularly the case when ethnic groups lived on both sides of the border and social and political tensions had already established themselves along ethnic or religious lines of conflict before the war. Displacements, deportations and mass violence were the result. The genocide of the Armenian population is the most extreme example of this development. This anthology examines the border regions of the Ottoman, Russian and Habsburg empires during the First World War with regard to radical population policy and genocidal violence from a comparative perspective in order to draw a more precise picture of escalating and deescalating factors.}, language = {en} } @book{OPUS4-47803, title = {The human right to a dignified existence in an international context}, series = {Schriften des MenschenRechtsZentrums der Universit{\"a}t Potsdam ; 46}, journal = {Schriften des MenschenRechtsZentrums der Universit{\"a}t Potsdam ; 46}, editor = {Gunnarson, Logi and M{\"u}rbe, Ulrike and Weiß, Norman}, publisher = {Nomos}, address = {Baden-Baden}, isbn = {978-3-84875-812-8}, pages = {121}, abstract = {In ihren Beitr{\"a}gen verbinden die Autoren grunds{\"a}tzliche philosophische {\"U}berlegungen zur grundlegenden Bedeutung von Menschenw{\"u}rde f{\"u}r die Menschenrechte mit konkreteren Forderungen, wie mit der Befriedigung lebensnotwendiger Bed{\"u}rfnisse umzugehen und was zur Beendigung von Armut notwendig ist. Ihre rechtlichen und politischen Argumente st{\"u}tzen sich auf j{\"u}ngere Rechtsprechung regionaler Gerichtsh{\"o}fe und internationaler Menschenrechtsorgane. Sie berufen sich auf die Verpflichtungsdimensionen der Menschenrechte und fragen nach der Verantwortlichkeit f{\"u}r deren Umsetzung. Die Autorinnen kommen aus Universit{\"a}ten in Deutschland, der Schweiz, den Niederlanden und dem Vereinigten K{\"o}nigreich.}, language = {en} } @book{OPUS4-57691, title = {Linguistic hybridity}, series = {Studia Romanica}, journal = {Studia Romanica}, number = {232}, editor = {Hennemann, Anja and Meisnitzer, Benjamin}, publisher = {Universit{\"a}tsverlag Winter}, address = {Heidelberg}, isbn = {978-3-8253-4936-3}, pages = {229}, year = {2022}, abstract = {This volume deals with different linguistic phenomena representing grammaticalization and lexicalization processes and combines different approaches of contact linguistics and variational linguistics. It contains papers on clitic placement in Angolan Portuguese, on the use of subject pronouns in French, Brazilian Portuguese and Caribbean Spanish, on evidential marking in Paraguayan Spanish, on Paraguayan Guaran{\´i}, on evidentiality in different varieties of Spanish, on discourse markers in Latin America, on modal particles in Italian and their translation into German, on bilingual communities in Southern Brazil, on Spanish-German-Russian language contact and on Romance aspectual periphrases in contact with English progressives.}, language = {en} } @book{OPUS4-28852, title = {General algebra and applications}, series = {Research and exposition in mathematics}, volume = {20}, journal = {Research and exposition in mathematics}, editor = {Denecke, Klaus-Dieter}, publisher = {Heldermann}, address = {Berlin}, isbn = {3-88538-220-2}, pages = {237 S. : Ill.}, year = {1993}, language = {en} }