Bounds and Estimates for the Response to Correlated Fluctuations in Asymmetric Complex Networks

We study the spreading of correlated fluctuations through networks with asymmetric and weighted coupling. This can be found in many real systems such as renewable power grids. These systems have so far only been studied numerically. By formulating a network adapted linear response theory, we derive an analytic bound for the response. For colored we find that vulnerability patterns noise are linked to the left Laplacian eigenvectors of the overdamped modes. We show for a broad class of tree-like flow networks, that fluctuations are enhanced in the opposite direction of the flow. This novel mechanism explains vulnerability patterns that were observed in realistic simulations of renewable power grids

The impact of model detail on power grid resilience measures

Peer reviewedPreprin

Bildkunde Südosteuropas. Ein Einblick

1. Mailand, Mussolini und zwei Maler: Die Biografien Gino Boccasiles und Giulio Bertolettis von Isabelle Arend 2. AEG, Siedlerstolz und Schwarzmarkt - von Kristin Bub 3. Weshalb die Technik ihre Lakaien fressen darf von Astrid Deilmann 4. Ein „Triumph der Nackten Tatsachen“: Der Eiffelturm auf der Weltausstellung 1900 von Anna Diercks ´ 5. „Die Saar bleibt deutsch!“ von Silke Eilers 6. Der Film als historische Quelle. von Johannes Etmanski 7. Das Skelett auf dem Bomber von Andreas Fleischer 8. Geschichte als Bild und Geschichtsbild: von Sabine Merten 9. Zum Porträt eines Nicht-Porträtierten von Thomas Pöpper 10. Die bildliche Darstellung des Moskauer Großfürsten auf der Carta marina und in der Historia de gentibus septentrionalibus des Olaus Magnus von Maike Sac

Cloning of a Carcinoembryonic Antigen Gene Family Member Expressed in Leukocytes of Chronic Myeloid Leukemia Patients and Bone Marrow

The carcinoembryonic antigen (CEA) gene family belongs to the immunoglobulin superfamily and can be subdivided into the CEA and pregnancy-specific glycoprotein subgroups. The basic structure of the encoded proteins consists of, in addition to a leader, one IgV-like and 2, 3, or 6 IgC-like domains. These domains are followed by varying COOH-terminal regions responsible for secretion, transmembrane anchoring, or insertion into the membrane by a glycosyl phosphatidylinositol tail. Here we report on the characterization of CGM6, a new member of the CEA gene subgroup, by complementary DNA cloning. The deduced coding region comprises 349 amino acids and consists of a leader, one IgV-like, two IgC-like domains, and a hydrophobic region, which is replaced by a glycosyl phosphatidylinositol moiety in the mature protein. CGM6 transcripts were only found thus far in leukocytes of chronic myeloid leukemia patients, in normal bone marrow, and in marginal amounts in normal granulocytes. The CGM6 gene product might, therefore, represent a myeloid marker. Analyses of CGM6 protein-expressing HeLa transfectants with monoclonal antibodies strongly indicate that the CGM6 gene codes for the CEA family member NCA-95

Robust Reconstruction from Chopped and Nodded Images

In ground based infrared imaging a well-known technique to reduce the influence of thermal and background noise is chopping and nodding, where four different signals of the same object are recorded from which the object is reconstructed numerically. Since noise in the data can severely affect the reconstruction, regularization algorithms have to be implemented. In this paper we propose to combine iterative reconstruction algorithms with robust statistical methods. Moreover, we study the use of multiple chopped data sets with different chopping amplitudes and the according numerical reconstruction algorithm. Numerical simulations show robustness of the proposed methods with respect to noisy data.Comment: 8 page

Migration in the Mediterranean

Die internationale Migration im Mittelmeerraum hat seit den 1990er Jahren einen tief greifenden Wandel erlebt, sie hat erheblich zugenommen, ist deutlich heterogener geworden und aus den ehemaligen Abwanderungsgebieten im Süden Europas sind selbst Regionen mit Zuwanderungsüberschuss geworden. Mit dem Anwachsen der Zahl an Asylbewerbern, Flüchtlingen und undokumentierten Migranten seit den 1990er Jahren werden diese Wanderungsbewegungen in europäischer Wahrnehmung zunehmend als Bedrohung empfunden. Zahlreiche EU-Staaten haben hierauf mit einer Verschärfung ihrer Zuwanderungs- und Aufenthaltsgesetze reagiert, während andere der Zuwanderung in den Arbeitsmarkt positiver gegenüber stehen und wiederholt illegale Zuwanderung nachträglich regularisiert haben. Gleichzeitig hat die Ausweitung der EU und die damit verbundenen Freizügigkeitsregelungen für die Niederlassung von EU-Bürgern in anderen Ländern zwischenzeitlich einen EUBinnenwanderungsraum geschaffen, der sich von den benachbarten nicht EU-Ländern abhebt und in den Medien auch als „Festung Europa“ bezeichnet wird, deren Südgrenze den Mittelmeerraum durchschneidet. Während die EU bestrebt ist, Migration selektiv zu steuern, haben die südlichen Nachbarregionen ein Interesse, Wanderung für ihre eigene Entwicklung zu nutzen. Diese Interessengegensätze zu einem gegenseitigen Nutzen zu vereinen ist u.a. Ziel der EuroMediterranen Partnerschaft, bei der Wanderungsfragen gegenwärtig einen Arbeitsschwerpunkt darstellen. Der Beitrag beschreibt den Verlauf der Wanderungsströme im Mittelmeerraum und die in den Mittelmeerländern ansässige nicht-einheimische Bevölkerung2 nach ausgewählten Ländern im Überblick und stellt die aktuellen Wanderungstrends in den Zusammenhang regionaler Entwicklungsunterschiede und divergierender demographischer Entwicklungen in der Region. Darüber hinaus werden die unterschiedlichen Ziele der aktuellen Wanderungspolitiken der Mittelmeeranrainer im Kontext der aktuellen internationalen Diskussion um die Ergebnisse der Global Commission on International Migration und dem Global Forum on Migration and Development zum Zusammenhang zwischen internationaler Wanderung und Entwicklung bzw. der Steuerung von Wanderung durch transnationale Kooperation analysiert und hinsichtlich möglicher künftiger Trends der internationalen Wanderung im Mittelmeerraum interpretiert.International migration in the Mediterranean has changed dramatically since the 1990s. It has increased significantly, become far more heterogeneous and the former countries of emigration of Southern Europe have become preferred destinations of immigration flows themselves. With the increase in the number of asylum seekers, refugees and undocumented migrants since the 1990s, these migratory movements are increasingly perceived as a threat by many Europeans. Many EU countries have responded by tightening their immigration and residence laws, while others consider immigration into the labour market generally positively and have repeatedly regularised undocumented immigration flows. At the same time, the expansion of the EU and the related regulations on freedom of residence for EU citizens has created an internal migration space within the EU. Referred to in the media as “Fortress Europe”, this is separated from the neighbouring non-EU countries and has a southern border that cuts through the Mediterranean region. While the EU is striving to regulate migration selectively, its southern neighbours are interested in using migration to boost their own development. One of the goals of the Euro-Mediterranean Partnership, which is currently focusing on migration issues, is to unite these opposing interests for the benefit of all concerned. This article describes changes in the migration flows affecting the Mediterranean region, presents an overview of the foreign3 population in the Mediterranean countries based on selected examples and puts current migration trends into the context of regional development differences and divergent demographic developments in the region. It also analyses the different goals of the Mediterranean neighbouring countries’ current migration policies in the context of the recent international discussion on the results of the Global Commission on International Migration and the Global Forum on Migration and Development regarding the relationship between international migration and development as well as migration management through transnational cooperation. Further, the paper relates these policies to possible future trends in international migration in the Mediterranean region

Leveraging Crowdsourcing and Crowdsensing Data for HADR Operations in a Smart City Environment

The future of the world's population concentration lies within the bounds of urban cities. Citizens, or humans, are the most important tangible resources in a smart city environment, and they need to be served as well as protected. The concept of smart cities is trying to accomplish the idea of serving the citizens by leveraging the potential of information and communications technology assets. Citizens have access to smart technologies and applications, and thus they form an indispensable component to complement and supplement a smart city's operation. Especially in humanitarian assistance and disaster recovery (HADR) operations, where a smart city's core infrastructure might be compromised, the assets of citizens can be put to use. This article aims to describe the current state of affairs for safety in cities and humanitarian assistance in emergency situations, which require leveraging situational awareness data. We discuss and propose mechanisms for connecting to and utilizing crowdsourcing and crowdsensing data in a smart city environment, which can assist in efficient HADR operations