Eine Uni - ein Buch: Das zweite Buch!

Dieses Buch stellt gleichsam die Ernte der einjährigen universitätsweiten Auseinandersetzung mit dem Buch «Erfindet euch neu! Eine Liebeserklärung an die vernetzte Generation» von Michel Serres dar. Auslöser war der Gewinn des Wettbewerbs «Eine Uni – ein Buch», der vom Stifterverband und der Klaus Tschira Stiftung in Kooperation mit DIE ZEIT ausgeschrieben worden ist. Nach einer kurzen Einführung in den Wettbewerbsbeitrag der Stiftung Universität Hildesheim erfolgen Überlegungen über Sprache und Literatur im digitalen Zeitalter sowie zwei ausführliche Auseinandersetzungen aus soziologischer und politikwissenschaftlicher Perspektive mit dem Buch des französischen Philosophen über die kleinen Däumlinge. Großen Raum nehmen sodann die mannigfaltigen Antworten von Studierenden, Lehrenden und Mitarbeiter_innen im Rahmen von Einzelinterviews zu den drei Leitfragen ein: 1. Was verstehen wir unter Wissen? 2. Wie ist unsere digitale Wahrnehmung? 3. Wie tickt unsere Zeit? Ergänzt werden diese Stimmen durch den Abdruck verschiedener Screenshots aus den digitalen Lesegruppen und Leseforen. Ein Essay über soziales Lesen und Schreiben unter den Bedingungen der digitalen Transformation rundet diesen Band ab

Polarization effects in tau production by neutrino

We studied polarization effects in tau production by neutrino-nucleon scattering. Quasi-elastic scattering, $Delta$ resonance production and deep inelastic scattering processes are taken into account for the CERN-to-Gran Sasso projects. We show that the tau produced by neutrino has high degree of polarization, and its spin direction depends non-trivially on the energy and the scattering angle of tau in the laboratory frame.Comment: 6 pages, 5 eps figures, espcrc2.sty; Proceedings of the 3rd International Workshop on Neutrino-Nucleus Interactions in the Few GeV Region (NuInt04), March 17-21, 2004, Gran Sasso, Italy; minor changes, typos in Eq. (6) correcte

Tau Polarization in Tau-Neutrino Nucleon Scattering

We investigate the spin polarization of \tau^{\pm} leptons produced in \nu_{\tau} and \bar{\nu}_{\tau} nucleon scattering via charged currents. Quasi-elastic scattering, \Delta resonance production and deep inelastic scattering processes are studied. The polarization information is essential for measuring the \tau^{\pm} appearance rate in long baseline neutrino oscillation experiments, because the decay particle distributions depend crucially on the \tau^{\pm} spin. In this article, we calculate the spin density matrix of each process and estimate the spin polarization vector in medium and high neutrino energy interactions. We find that the produced \tau^{\pm}'s have high degree of polarization, and their spin direction depends non-trivially on the energy and the scattering angle of \tau^{\pm} in the laboratory frame.Comment: 23 pages, 35 figures; compile errors corrected; notation errors in Eq.(30) and (31) corrected, typo error in Eq.(40) corrected, references and comments in footnote adde

Transient elevated serum prolactin in trans women is caused by cyproterone acetate treatment

Purpose: Hormone treatment in trans women in Europe usually consists of the administration of estrogens and antiandrogens, for example, cyproterone acetate (CPA). Mild serum prolactin elevations during follow-up are attributed to estrogen therapy. This analysis evaluates whether CPA contributes to the elevation of prolactin in trans women receiving gender affirming hormones. Methods: This study is part of the endocrine part of the European Network for the Investigation of Gender Incongruence (ENIGI). Belgian data were selected for this substudy. Trans women who initiated gender affirming hormone treatment and underwent orchiectomy were prospectively evaluated. Trans women were treated with oral CPA 50 mg in combination with estrogen substitution. Postsurgery, estrogen was reinitiated in an unchanged dose. Sex steroids, gonadotropins, and prolactin were compared at baseline, pre- and postsurgery in patients receiving orchiectomy, and at baseline, 12, and 18 months in patients who did not undergo orchiectomy. Results: One hundred and seven trans women participated in this analysis, with a mean age of 31.5 years. An increase in serum prolactin levels was seen in the group undergoing orchiectomy (23.72 mu g/L) and not undergoing orchiectomy (23.05 mu g/L) at the preoperative and 12-month visit, compared with baseline (9.42 mu g/L, P = 0.002 and 9.94 mu g/L, P < 0.001, respectively). After orchiectomy, a decline in prolactin levels (10.17 mu g/L, P < 0.001) occurred. Conclusions: CPA is likely to cause a temporary increase in serum prolactin, with prolactin levels returning to normal after orchiectomy and CPA discontinuation

The Decay of Tau Leptons Produced in Neutrino-Nucleon Scatterings

Energy and angular distributions of the tau decay products in the CERN-to-Gran Sasso $\nu_\tau$ appearance experiments are studied for the decay modes $\tau\to\pi\nu$ and $\tau\to l\bar\nu\nu$ (l=e or mu). We find that the decay particle distributions in the laboratory frame are significantly affected by the tau polarization. Rather strong azimuthal asymmetry of $pi^-$ and $l^-$ about the tau momentum axis is predicted, which may have observable consequences even at small statistics experiments.Comment: 14 pages, 6 eps figures; comments on Fig. 1 added, Fig. 4 improved to see clearl

Characterizing the Urban Mine—Challenges of Simplified Chemical Analysis of Anthropogenic Mineral Residues

Anthropogenic mineral residues are characterized by their material complexity and heterogeneity, which pose challenges to the chemical analysis of multiple elements. However, creating an urban mine knowledge database requires data using affordable and simple chemical analysis methods, providing accurate and valid results. In this study, we assess the applicability of simplified multi-element chemical analysis methods for two anthropogenic mineral waste matrices: (1) lithium-ion battery ash that was obtained from thermal pre-treatment and (2) rare earth elements (REE)-bearing iron-apatite ore from a Swedish tailing dam. For both samples, simplified methods comprising ‘inhouse’ wet-chemical analysis and energy-dispersive Xray fluorescence (ED-XRF) spectrometry were compared to the results of the developed matrix-specific validated methods. Simplified wet-chemical analyses showed significant differences when compared to the validated method, despite proven internal quality assurance, such as verification of sample homogeneity, precision, and accuracy. Matrix-specific problems, such as incomplete digestion and overlapping spectra due to similar spectral lines (ICP-OES) or element masses (ICP-MS), can result in quadruple overestimations or underestimation by half when compared to the reference value. ED-XRF analysis proved to be applicable as semi-quantitative analysis for elements with mass fractions higher than 1000 ppm and an atomic number between Z 12 and Z 50. For elements with low mass fractions, ED-XRF analysis performed poorly and showed deviations of up to 90 times the validated value. Concerning all the results, we conclude that the characterization of anthropogenic mineral residues is prone to matrix-specific interferences, which have to be addressed with additional quality assurance measures.DFG, 414044773, Open Access Publizieren 2019 - 2020 / Technische Universität BerlinEC/H2020/641999/EU/ Prospecting Secondary raw materials in the Urban mine and Mining waste/ProSU

Highly soluble Cu(I)-acetonitrile salts as building blocks for novel phosphorus-rich organometallic-inorganic compounds

The synthesis of the air-stable and highly soluble Cu(I)-acetonitrile salts [Cu(CH3CN)3.5][FAl] (1) ([FAL] = FAl{OC(C6F10)(C6F5)}3) and [Cu(CH3CN)4][TEF] (2) ([TEF] = Al{OC(CF3)3}4) is presented. Compound 1 reacts with the organometallic polyphosphorus complexes [Cp2Mo2(CO)4(ƞ2-P2)] (A) and [(Cp*Fe(ƞ5-P5)] (B) and salt 2 reacts with B to form one new (3) and three unprecedented (4-6) phosphorus-rich Cu(I) dimers with the general formulas [Cu2(µ,ƞ1:ƞ1-A)2(ƞ2-A)2][FAl]2 (3), [Cu2(µ,ƞ1:ƞ1-A)2(ƞ1-CH3CN)4][FAl]2 (4), [Cu2(µ,ƞ1:ƞ1-B)2(ƞ1-CH3CN)4][FAl]2 (5) and [Cu2(µ,ƞ1:ƞ1-B)2(ƞ1-CH3CN)4][TEF]2 (6)