Sharpening Geometric Inequalities using Computable Symmetry Measures

Many classical geometric inequalities on functionals of convex bodies depend on the dimension of the ambient space. We show that this dimension dependence may often be replaced (totally or partially) by different symmetry measures of the convex body. Since these coefficients are bounded by the dimension but possibly smaller, our inequalities sharpen the original ones. Since they can often be computed efficiently, the improved bounds may also be used to obtain better bounds in approximation algorithms.Comment: This is a preprint. The proper publication in final form is available at journals.cambridge.org, DOI 10.1112/S002557931400029

Analysis of wind and response measurement data from a suspension bridge

The Lysefjord Bridge is a suspension bridge at the entrance to the Lysefjord in south-western Norway at which full-scale measurements on wind conditions and bridge response are collected using anemometers and accelerometers. In this work Python is used to develop a toolset for analysing the wind and response measurement data from the Lysefjord Bridge. The functionality is provided through different methods compiled in a class. This includes methods for importing and combining data from multiple days, re-arranging and interpreting the data, feature engineering, data cleaning, filtering and various types of visualisations. The code is demonstrated in an analysis of 30 days of data. The analysis focuses on the wind conditions for south-westerly and north-easterly winds in terms of wind speeds, primary directions, turbulence intensity and angle of attack as well as the bridges lateral, vertical and torsional wind response. The analysis shows on average slightly higher wind speeds, lower turbulence intensities and higher angles of attack for south-westerly winds, compared to north-easterly winds. Towards the southern end of the bridge the wind direction has a south tendency for south-westerly winds and north tendency for north-easterly winds. Turbulence intensity is measured slightly higher on the downwind side of the bridge. The angle of attack is straightened towards 0° on the downwind side. Furthermore, the analysis shows that the assumption of a linear correlation between drag coefficient and angle of attack used in the so-called quasi-steady theory of wind loading and the corresponding numerical simulations underestimates most of the larger lateral bridge responses at angles of attack above 0°. The lift and moment coefficients estimated using similar linearity assumptions overestimate some of the larger vertical and torsional bridge responses at angles of attack above +5°

Systematic analysis of primary sequence domain segments for the discrimination between class C GPCR subtypes

G-protein-coupled receptors (GPCRs) are a large and diverse super-family of eukaryotic cell membrane proteins that play an important physiological role as transmitters of extracellular signal. In this paper, we investigate Class C, a member of this super-family that has attracted much attention in pharmacology. The limited knowledge about the complete 3D crystal structure of Class C receptors makes necessary the use of their primary amino acid sequences for analytical purposes. Here, we provide a systematic analysis of distinct receptor sequence segments with regard to their ability to differentiate between seven class C GPCR subtypes according to their topological location in the extracellular, transmembrane, or intracellular domains. We build on the results from the previous research that provided preliminary evidence of the potential use of separated domains of complete class C GPCR sequences as the basis for subtype classification. The use of the extracellular N-terminus domain alone was shown to result in a minor decrease in subtype discrimination in comparison with the complete sequence, despite discarding much of the sequence information. In this paper, we describe the use of Support Vector Machine-based classification models to evaluate the subtype-discriminating capacity of the specific topological sequence segments.Peer ReviewedPostprint (author's final draft

Feminist Futures of Work:Reimagining Labour in the Digital Economy

The future of work is at the centre of debates related to the emerging digital society. Concerns range from the inclusion, equity, and dignity of those at the far end of the value chain, who participate on and off platforms, often in the shadows, invisible to policymakers, designers, and consumers. Precarity and informality characterize this largely female workforce, across sectors ranging from artisanal work to salon services to ride hailing and construction. A feminist reimagining of the futures of work—what we term as “FemWork" —is the need of the day and should manifest in multiple and various forms, placing the worker at the core and drawing on her experiences, aspirations, and realities. This volume offers grounded insights from academic, activist, legal, development and design perspectives that can help us think through these inclusive futures and possibly create digital, social, and governance infrastructures of work that are fairer and more meaningful

Marcel Mauss (1872-1950)

« Mauss sait tout », avaient l’habitude de dire les étudiants de sociologie à Paris vers le milieu des années 1920. Cet énoncé ne se référait pas seulement aux qualités personnelles de l’intéressé, mais revenait à prendre acte explicitement du fait que, après la mort prématurée d’Emile Durkheim (1917), Mauss fut considéré comme le chef de file de l’école durkheimienne. Cette idée, vague dans un premier temps, ne cessa de se confirmer. En 1925, il fut à l’origine de la refondation de L’Année s..

Identität und Anpassung im Exil

Anhand der eigenen Biographie werden die Probleme der Identität und Anpassung eines Sozialwissenschaftlers insbesondere eines Soziologen durch die Vertreibung aus dem nationalsozialistischen Deutschland geschildert. Für das Leben im Exil wird gesagt, daß nicht so sehr der Ortswechsel das Problem ist, sondern die Unerwünschtheit am Ziel des Ortswechsels. Emigration stellt eine schwere psychische Krisensituation dar, die umso stärker ist, je mehr der Ausgestoßene unter Zwang steht, einen Ortswechsel vorzunehmen. Es ist plötzlich etwas unheimliches um ihn; denn man versteht nicht, wie die Sympathien am neuen Ort mit dem Verlassen des Ursprungortes verbunden sind. Es werden die kulturellen, vor allem sprachlichen Probleme der Anpassung an ein oft nur scheinbares Provisorium und die Schwierigkeiten bei der Rückkehr nach Deutschland nach 1945 beschrieben. (GF

"Zwei Karrieren - Eine Familie?" : Ergebnisse aus dem Projekt "Durch Selbständigkeit zur Doppelkarriere? Berufs-, Partnerschafts- und Lebenskonzepte erfolgreicher Gründerinnen"

Es wurde eine Abschätzung der Verbreitung von Doppelkarrierenpaaren in Deutschland vorgenommen. Verschiedene Erfolgsmaße wurden differenziert betrachtet. Neben objektiven Kriterien wie dem Einkommen wurden auch subjektive Erfolgsmerkmale wie die zufriedenheit und die work-life Balance in unterschiedlichen Partnerschaftskonstellationen näher untersucht