Lieux chargés: #afterlives of Stolpersteine

Europe’s largest decentralised memorial is artist Gunter Demnig’s ​Stolpersteine​—‘stumbling stones’— small brass plaques installed in the pavement in front of the former homes of victims of Nazi persecution. The plaques are controversial, and have been celebrated, imitated, and vandalised, triggering myriad afterlives.These installations are ​counter-memorials, ​a​ ​genre of art and memory activism

In-medium broadening of nucleon resonances

We analyze the effects of an in-medium broadening of nucleon resonances on the exclusive photoproduction of mesons on nuclei as well as on the total photoabsorption cross sections in a transport calculation. We show that the resonance widths observed in semi-inclusive photoproduction on nuclei are insensitive to an in-medium broadening of nucleon resonances. This is due to a simple effect: the sizeable width of the nuclear surface and Fermi motion.Comment: 4 pages, 3 figures, minor changes in the tex

Laser pulse analysis

Methods are presented for locating threshold points by using laser pulse analysis. It was found that there are errors involved in the determination of each of these quantities, and an attempt was made to separate their effects on the overall range correction. Several series of corrected range measurements for fixed reflectors and satellites were obtained. Residuals were computed by fitting the range measurements to either fixed-reflector distances or short arcs of satellite orbits. Root mean square values of these residuals are presented

Photoproduction of pi0-mesons from nuclei

Photoproduction of neutral pions from nuclei (carbon, calcium, niobium, lead) has been studied for incident photon energies from 200 MeV to 800 MeV with the TAPS detector using the Glasgow photon tagging spectrometer at the Mainz MAMI accelerator. Data were obtained for the inclusive photoproduction of neutral pions and the partial channels of quasifree single pi0, double pi0, and pi0pi+/- photoproduction. They have been analyzed in terms of the in-medium behavior of nucleon resonances and the pion - nucleus interaction. They are compared to earlier measurements from the deuteron and to the predictions of a Boltzmann-Uehling-Uhlenbeck (BUU) transport model for photon induced pion production from nuclei.Comment: 15 pages, 22 figures, accepted for publication in EPJ

Total Synthesis of Tulearin C

With the help of the smaller brother: Although alkyne metathesis will always be the little brother of alkene metathesis, it allows problems to be solved that are currently beyond reach of the more famous sibling. This notion is exemplified by the tulearin macrolides, which could only be selectively forged by ring-closing alkyne metathesis (RCAM)/trans reduction using the latest generation of alkyne metathesis catalysts

Chronicles of Oklahoma

Article discusses the mayoral campaign and tenure of John C. "Jack" Walton as the mayor of Oklahoma City. Quincy R. Lehr explores the way Walton navigated a politically tumultuous time and gained the support of labor leaders and African American citizens in Oklahoma City before his controversial governorship

The value of 'dialogue events' as sites of learning: an exploration of research & evaluation frameworks

In this article, we draw from our experiences as UK and US-based 'dialogue event' practitioners and researchers/ evaluators to suggest that these existing evaluative criteria are insufficient to explore the role and value of ISI-based 'dialogue events'. Instead, we suggest that it may be productive to research and evaluate these ISI-based 'dialogue events' as sites of learning. Secondly, however, we show through a discussion of our own research frameworks that understanding these 'dialogue events' as sites of learning does not intuitively provide a framework for understanding what counts as success for these efforts. Instead, research on the role of 'dialogue' within the educational literature – and the connections between 'dialogue' and competing understandings of the nature of science and society – offers a multiplicity of approaches to defining the terms and goals of these events. Finally, we identify two broader implications of researching and evaluating these 'dialogue events' as sites of learning for ISIs and all efforts to increase public engagement with science and technology

Spectral Function of Quarks in Quark Matter

We investigate the spectral function of light quarks in infinite quark matter using a simple, albeit self-consistent model. The interactions between the quarks are described by the SU(2) Nambu--Jona-Lasinio model. Currently mean field effects are neglected and all calculations are performed in the chirally restored phase at zero temperature. Relations between correlation functions and collision rates are used to calculate the spectral function in an iterative process.Comment: final version, published in PRC; 15 pages, RevTeX