Freiwilliges Engagement in der Flucht*Migrationsgesellschaft. Zur Rekonstruktionen von Privilegien und Unterwerfung in der lebensgeschichtlichen Erzählung einer ehrenamtlich tätigen Seniorin

In Studien zur Freiwilligenarbeit in der Flucht*Migrationsgesellschaft Deutschlands werden postkoloniale Perspektiven in theoretisch-konzeptionellen Arbeiten entfaltet (vgl. Castro-Varela 2018; Castro-Varela & Heinemann 2016; Kopahnke 2018). In der empirischen Forschung sind sie, wie auch rassismuskritische Rahmungen, hingegen kaum zu finden: "studies on volunteering tend to neglect to explore race at all. When they do, race is simply considered a factor influencing engagement, rather than a structural issue" (Chadderton 2016, S. 233, vgl. S. 234). An dieses Desiderat rekonstruktiver und rassismuskritischer Studien zur Freiwilligenarbeit in der Flucht*Migrationsgesellschaft anknüpfend stellen die Autorinnen die Analyse eines biografisch-narrativen Interviews (vgl. Schütze 1983) mit einer Seniorin vor und präsentieren dazu zunächst ihren methodischen Zugang. In der Analyse rekonstruieren sie den subjektiven Sinn, den die Seniorin ihrem freiwilligen Engagement in ihrer lebensgeschichtlichen Erzählung zum Zeitpunkt des "kurzen Sommer[s] der Barmherzigkeit" (Mecheril 2020, S. 105) verleiht. Dabei ziehen sie abschließend das theoretische Konzept "White Fragility" (DiAngelo 2011) heran, um die "white responses" (DiAngelo 2016, S. 246) der Biografin auf die Komplexität rassistischer Verhältnisse im Rahmen der Freiwilligenarbeit herauszuarbeiten. (DIPF/Orig.)In studies on volunteering in the context of forced migration in Germany, postcolonial perspectives are developed in theoretical-conceptual studies (see Castro-Varela 2018; Castro-Varela & Heinemann 2016; Kopahnke 2018). In empirical research, however, they are hard to find, as is critical race theory: "studies on volunteering tend to neglect to explore race at all. When they do, race is simply considered a factor influencing engagement, rather than a structural issue" (Chadderton 2016, p. 233–234). Following this desideratum, the authors present the analysis of a biographical narrative interview (Schütze 1983) with a senior woman and first present their methodological approach. In the analysis, they reconstruct the subjective meaning she attaches to her volunteer work in her life story at the time of the \u27short summer of mercy\u27 (Mecheril 2020, p. 105). Finally, they draw on the theoretical concept of \u27white fragility\u27 (DiAngelo 2011) to elaborate the biographer\u27s \u27white responses\u27 (DiAngelo 2016, p. 246) to the complexity of race relations in the context of volunteering. (DIPF/Orig.

On Superpotentials and Charge Algebras of Gauge Theories

We propose a new "Hamiltonian inspired" covariant formula to define (without harmful ambiguities) the superpotential and the physical charges associated to a gauge symmetry. The criterion requires the variation of the Noether current not to contain any derivative terms in \partial_{\mu}\delta \f. The examples of Yang-Mills (in its first order formulation) and 3-dimensional Chern-Simons theories are revisited and the corresponding charge algebras (with their central extensions in the Chern-Simons case) are computed in a straightforward way. We then generalize the previous results to any (2n+1)-dimensional non-abelian Chern-Simons theory for a particular choice of boundary conditions. We compute explicitly the superpotential associated to the non-abelian gauge symmetry which is nothing but the Chern-Simons Lagrangian in (2n-1) dimensions. The corresponding charge algebra is also computed. However, no associated central charge is found for $n \geq 2$. Finally, we treat the abelian p-form Chern-Simons theory in a similar way.Comment: 32 pages, LaTex. The proposal is restricted to first order theories. An appendix is added. Some references are adde

Integrating Ecosystem Services into Risk Assessments for Drinking Water Protection

Water protection is a widely supported goal in society, but competing interests often complicate the implementation of water protection measures. Moreover, the benefits of protection efforts are typically underestimated as risk assessments focus on the provision of drinking water and neglect the additional services provided by a clean drinking water source. We developed a list of water system services (WSS) that allows assessment of all biotic and abiotic services provided by a drinking water source. The WSS were derived from the Common International Classification of Ecosystem Services (CICES). The objectives of this paper are to (i) introduce the concept of WSS, (ii) describe a procedure on how to develop a region-specific list of WSS and present a list of WSS specifically tailored to Sweden, (iii) present how to integrate WSS into a risk assessment for drinking water, and (iv) illustrate a practical application on a Swedish case study. The results, presented as an assessment matrix, show the provided services and contrast the hazard sources with their impact on all services. The WSS assessment can be used to communicate and negotiate the extent of water protection measures with relevant stakeholders and illustrate synergies and trade-offs of protective measures beyond drinking water protection

The Fountain District: Framework Plan

The \u27South Auditorium\u27 neighborhood established itself in the days when loggers and other workers filled the district’s hotels due to its proximity to the river. In the wake of the Great Depression and as the logging trade declined, the area began to fall into disrepair and development shifted away from the Willamette River. By the 1950s, many of its 2,000+ inhabitants were low-income or elderly and living in small, poorly maintained apartments, shuffling from one to the next as they were forced out of their prior home. The neighborhood was also extremely diverse, housing numerous immigrant families, particularly Italian, Jewish, Chinese, and African American families. In 1955, the newly formed Portland Development Commission targeted a block of land in what was then considered part of South Portland as a test of the new Urban Renewal philosophy making the rounds in planning circles, at the behest of the Mayor’s Advisory Committee. It was decided that a 110 acre portion of the district would be razed in two phases. Interestingly, the district had originally been intended as the home for a new expo center or coliseum, with the remaining redevelopment occurring around it. This center would be just the sort of attraction to lure people to the city center, it was believed; these plans were scrapped, however, after conflicts between interested parties on each side of the Willamette resulted in the centerpiece of the project (later to be Veterans’ Memorial Coliseum) being relocated to the eastern side of the river. Inspired by the design principles of Le Corbusier and the budgets of major firms such as Skidmore, Owings, and Merrill (SOM), renewal pressed onward, with the forthcoming towers and plazas to be punctuated by greenspaces, among them a set of fountains crafted by Lawrence Halprin. Little, if anything, remains of the district as it had existed prior to the removal of the area’s residences, businesses, and the communities who resided there. This project was conducted under the supervision of Donald J. Stastny and Edward Starkie

Non-perturbative k-body to two-body commuting conversion Hamiltonians and embedding problem instances into Ising spins

An algebraic method has been developed which allows one to engineer several energy levels including the low-energy subspace of interacting spin systems. By introducing ancillary qubits, this approach allows k-body interactions to be captured exactly using 2-body Hamiltonians. Our method works when all terms in the Hamiltonian share the same basis and has no dependence on perturbation theory or the associated large spectral gap. Our methods allow problem instance solutions to be embedded into the ground energy state of Ising spin systems. Adiabatic evolution might then be used to place a computational system into it's ground state.Comment: Published versio

Currents and Superpotentials in classical gauge invariant theories I. Local results with applications to Perfect Fluids and General Relativity

E. Noether's general analysis of conservation laws has to be completed in a Lagrangian theory with local gauge invariance. Bulk charges are replaced by fluxes of superpotentials. Gauge invariant bulk charges may subsist when distinguished one-dimensional subgroups are present. As a first illustration we propose a new {\it Affine action} that reduces to General Relativity upon gauge fixing the dilatation (Weyl 1918 like) part of the connection and elimination of auxiliary fields. It allows a comparison of most gravity superpotentials and we discuss their selection by the choice of boundary conditions. A second and independent application is a geometrical reinterpretation of the convection of vorticity in barotropic nonviscous fluids. We identify the one-dimensional subgroups responsible for the bulk charges and thus propose an impulsive forcing for creating or destroying selectively helicity. This is an example of a new and general Forcing Rule.Comment: 64 pages, LaTeX. Version 2 has two more references and one misprint corrected. Accepted in Classical and Quantum Gravit