The Complex X-ray Spectrum of the Sefyert 1.5 Source NGC 6860

The X-ray spectrum of the Seyfert 1.5 source NGC 6860 is among the most complex of the sources detected in the Swift Burst Alert Telescope all-sky survey. A short XMM-Newton follow-up observation of the source revealed a flat spectrum both above and below 2 keV. To uncover the complexity of the source, in this paper we analyze both a 40 ks Suzaku and a 100 ks XMM-Newton observation of NGC 6860. While the spectral state of the source changed between the newer observations presented here and the earlier short XMM-Newton spectrum - showing a higher flux and steeper power law component - the spectrum of NGC 6860 is still complex with clearly detected warm absorption signatures. We find that a two component warm ionized absorber is present in the soft spectrum, with column densities of about 10^20 and 10^21 cm$^-2, ionization parameters of xi = 180 and 45 ergs cm s^-1, and outflow velocities for each component in the range of 0-300 km s^-1. Additionally, in the hard spectrum we find a broad (approx 11000 km s^-1) Fe K-alpha emission line, redshifted by approx 2800 km s^-1.Comment: 35 pages, 9 figures, Accepted to Ap

How norms can generate conflict

Norms play an important role in establishing social order. The current literature focuses on the emergence, maintenance and impact of norms with regard to coordination and cooperation. However, the issue of norm-related conflict deserves more attention. We develop a general theory of "normative conflict" by differentiating between two different kinds of conflict. The first results from distinct expectations of which means should be chosen to fulfil the norm, the second from distinct expectations of how strong the norm should restrain the self-interest. We demonstrate the empirical relevance of normative conflict in an experiment that applies the "strategy method" to the ultimatum game. Our data reveal normative conflict among different types of actors, in particular among egoistic, equity, equality and "cherry picker" types.Social norms, normative conflict, cooperation, ultimatum game, strategy method, equity

The emergence of norms from conflicts over just distributions

Why is it that well-intentioned actions can create persistent conflicts? While norms are widely regarded as a source for cooperation, this article proposes a novel theory in which the emergence of norms can be understood as a bargaining process in which normative conflicts explain the finally emerging norm. The theory is tested with a dynamical experiment on conflicts over the consideration of equality, effort or efficiency for the distribution of joint earnings. Normative conflict is measured by the number of rejected offers in a recursive bargaining game. The emerging normative system is analyzed by feedback cycles between micro- and macro-level. It is demonstrated that more normative cues cause more normative conflict. Further, under the structural conditions of either simple or complex situations, the convergence towards a simple and widely shared norm is likely. In contrast, in moderately complex situations, convergence is unlikely and several equally reasonable norms co-exist. The findings are discussed with respect to the integration of sociological conflict theory with the bargaining concept in economic theory.social norms, normative conflict, bargaining, cooperation, experiment

How Norms Can Generate Conflict: An Experiment on the Failure of Cooperative Micro-motives on the Macro-level

Why does the adherence to norms not prevent conflict? While the current literature focuses on the emergence, maintenance and impact of norms with regard to cooperation, the issue of norm-related conflict deserves more attention. We develop a general game theoretical model of "normative conflict” and explain how transaction failures on the macrolevel can result from cooperative motives on the microlevel. We differentiate between two kinds of conflict. The first results from distinct expectations regarding the way in which general normative obligations should be fulfilled, the second from distinct expectations as to how the norm should restrain actions based on self-interest. We demonstrate the empirical relevance of normative conflict in a version of the ultimatum game. Our data reveal widespread normative conflict among different types of actors - egoistic, equity, equality and cherry picker. Our findings demonstrate how cooperative intentions about how to divide a collectively produced good may fail to produce cooperative outcome

Regressionsbasierte Analyse der Entstehung von Parteibindungen und deren künftige Entwicklung in Ost- und Westdeutschland

Studie die den Einfluss verschiedener soziodemographischer Kovariablen auf die Entstehung und weitere Entwicklung der Parteibindung in Deutschland bestimmt. Hieraus werden Schlüsse auf die Bewertung der gängigen Wahlverhaltenstheorien und auf die Stabilität des deutschen Parteiensystems gezoge

Keine Philosophie aus zweiter Hand: Rezension zu "Was ist eine Kopie?" von Amrei Bahr

Amrei Bahr: Was ist eine Kopie? Hamburg: Felix Meiner 2022. 978-3-7873-4056-

Duale Schriftnutzung: Brailleschrift und Schwarzschrift

In diesem Open-Access-Buch werden die schriftsprachlichen Kompetenzen von Schülerinnen und Schülern mit dualer Schriftnutzung untersucht. Von einem dualen Schriftspracherwerb spricht man, wenn Kinder oder Jugendliche mit Sehbeeinträchtigung neben der Schwarzschrift auch die Brailleschrift erlernen. Vom Erwerb eines zusätzlichen Schriftmediums profitieren insbesondere Lernende mit fortschreitenden oder schwerwiegenden Augenerkrankungen. Wie wirkt sich ein dualer Schriftspracherwerb auf die Leseflüssigkeit, die Rechtschreibung bzw. das Lese- und Hörverstehen aus? Wie können Kinder und Jugendliche mit dualer Schriftnutzung gefördert werden? Um diese Fragen zu beantworten, werden die Ergebnisse aus einer Kompetenzerhebung sowie mehreren Fallstudien herangezogen und mit dem aktuellen Kenntnis- und Forschungsstand zur dualen Schriftnutzung verknüpft. Dazu werden praktische und anschauliche Beispiele geliefert, wie der Unterricht von Kindern und Jugendlichen mit dualer Schriftnutzung gelingen kann

The Swift BAT-detected Seyfert 1 Galaxies: X-ray Broadband Properties and Warm Absorbers

We present results from an analysis of the broad-band, 0.3-195 keV, X-ray spectra of 48 Seyfert 1-1.5 sources detected in the very hard X-rays with the Swift Burst Alert Telescope (BAT). This sample is selected in an all-sky survey conducted in the 14-195 keV band. Therefore, our sources are largely unbiased towards both obscuration and host galaxy properties. Our detailed and uniform model fits to Suzaku/BAT and XMM-Newton/BAT spectra include the neutral absorption, direct power-law, reflected emission, soft excess, warm absorption, and narrow Fe K-alpha emission properties for the entire sample. We significantly detect O VII and O VIII edges in 52% of our sample. The strength of these detections are strongly correlated with the neutral column density measured in the spectrum. Among the strongest detections, X-ray grating and UV observations, where available, indicate outflowing material. The ionized column densities of sources with O VII and O VIII detections are clustered in a narrow range with N$_{\rm warm} \sim 10^{21}$\,cm$^{-2}$, while sources without strong detections have column densities of ionized gas an order of magnitude lower. Therefore, we note that sources without strong detections likely have warm ionized outflows present but at low column densities that are not easily probed with current X-ray observations. Sources with strong complex absorption have a strong soft excess, which may or may not be due to difficulties in modeling the complex spectra of these sources. Still, the detection of a flat Gamma ~ 1 and a strong soft excess may allow us to infer the presence of strong absorption in low signal-to-noise AGN spectra. Additionally, we include a useful correction from the Swift BAT luminosity to bolometric luminosity, based on a comparison of our spectral fitting results with published spectral energy distribution fits from 33 of our sources.Comment: 60 pages (pre-print format), 14 figures, accepted to Ap