Edge-covering plane-filling curves on grid colorings: a pedestrian approach

We describe families of plane-filling curves on any edge-to-edge tiling of the plane with regular polygons and finitely many classes of edges. It is shown how to partition the minimal number of edge classes from the group G of symmetries of the tiling into refined colorings of the tiling, corresponding to finite subgroups of G. All of these colorings correspond to families of plane-filling curves which we call curve-sets. Our exposition is driven by illustrated examples

Electoral participation, political disaffection, and the rise of the populist radical right

Does the populist radical right benefit from increased electoral mobilization? Integrating theories of political grievances with accounts of party competition in Western Europe, we contend that the populist right gains advantage from increased electoral mobilization, but that this effect is conditional on political disaffection. We draw on a novel panel dataset (2009-2019) of more than 10,000 German municipalities and city districts to study the implications of turnout surges as a function of pre-existing levels of political disaffection in a difference-in-differences design. The results demonstrate that turnout surges benefit the populist right "Alternative fur Deutschland" (AfD) in contexts of widespread political distrust. In contrast, increased mobilization acts to depress its electoral fortunes in communities marked by low baseline levels of political disaffection. In shedding light on the interplay between political disaffection and electoral mobilization, this study has important implications for understanding the surge of the populist right in established democracies

Re-Seeing The Mighty: Critically Examining One Film\u27s Representations of Disability in the English Classroom

Films portraying characters with disabilities are often shown in the English classroom. Films such as Of Mice and Men, Simon Birch, To Kill a Mockingbird, The Hunchback of Notre Dame, The Glass Menagerie, Moby Dick, Gattaca, and A Beautiful Mind often show simplistic and stereotypical representations of characters and their disabilities. Although students are frequently encouraged to think critically about a film\u27s structure, themes, or symbolic elements, the authors argue that they should also learn to examine critically the representations of disability in these films. If stereotypical representations of characters with disabilities are not identified and challenged, another generation of people may hold on to outdated and unhealthy assumptions about real people with disabilities. In this article, the authors show what an active reading of The Mighty, a commonly used film by English teachers adapted from Rodman Philbrick\u27s novel Freak the Mighty, might look like. The Mighty is valuable in that it positively portrays friendships between disabled and nondisabled characters, but the damaging and limited representations of disability that this film offers may perpetuate prevailing stereotypes of disability so that students maintain a stigmatizing viewpoint of persons with disability labels. The authors provide a synopsis of The Mighty and then describe an analytical tool--Martin Norden\u27s stereotypic roles--that they think is useful in challenging negative constructions of characters with disabilities in the film. They present Norden\u27s roles and their own critical reading of The Mighty as a model for other English teachers to use when reading disability in both film and literature. The authors end with recommendations for teachers on how to approach using film in ways that are respectful of people with disabilities and that are accepting of difference in classrooms

Wechselspiel von Magnetismus und Supraleitung im Schwere-Fermionen-System CeCu2Si2

Das Auftreten von Supraleitung in Systemen mit schweren Fermionen, erstmals entdeckt in CeCu_2Si_2, wird mit der Nähe zu einem quantenkritischen Punkt in Verbindung gebracht. Daraus ergibt sich ein komplexes Zusammenspiel von Magnetismus und Supraleitung, das in der vorliegenden Arbeit durch Messungen der spezifischen Wärme, der Wechselfeldsuszeptibilität und durch inelastische Neutronenstreuexperimente an verschiedenen Einkristallen von CeCu_2(Si_{1-x}Ge_x)_2 untersucht wird. Der Schwerpunkt liegt auf der genauen Charakterisierung des magnetischen Anregungsspektrums von CeCu_2Si_2 des S-Typs. Die Ergebnisse der Neutronenstreumessungen implizieren stark, dass die Kopplung der supraleitenden Cooper-Paare durch überdämpfte Spinfluktuationen vermittelt wird, die in der Umgebung eines Quantenphasenübergangs gehäuft auftreten. Unter Substitution einiger Si- durch Ge-Atome in CeCu_2Si_2 stabilisiert sich die magnetische Ordnung, und die Supraleitung wird zunehmend unterdrückt. Neutronenstreumessungen ergeben, dass dies bei 2 % Ge-Substitution dazu führt, dass sich Magnetismus und Supraleitung gegenseitig verdrängen, während sie bei 10 % Ge-Substitution mikroskopisch koexistieren. - (Die Dissertation ist veröffentlicht im Logos Verlag Berlin GmbH, Berlin, Deutschland, http://www.logos-verlag.de, ISBN: 978-3-8325-2456-2)The occurrence of superconductivity in systems with heavy fermions, discovered for the first time in CeCu_2Si_2, is often linked to the vicinity of a quantum critical point. This results in a complex interplay of magnetism and superconductivity, which is studied by means of specific heat and ac susceptibility measurements as well as neutron scattering experiments on different single crystals of CeCu_2(Si_{1-x}Ge_x)_2 in the present thesis. The focus is put on the detailed characterisation of the magnetic excitation spectrum in S-type CeCu_2Si_2. Neutron scattering results strongly imply that the coupling of superconducting Cooper pairs is mediated by overdamped spin fluctuations, which accumulate in the vicinity of a quantum phase transition. By substituting Si by Ge atoms in CeCu_2Si_2 magnetic order is stabilised and superconductivity successively suppressed. Neutron scattering experiments demonstrate that 2 % Ge substitution leads to magnetic order being displaced by superconductivity on decreasing temperature, whereas both coexist microscopically in the case of 10 % Ge substitution

Second International Workshop on Linked Data-driven Resilience Research 2023

In the face of continuously changing contextual conditions and ubiquitous disruptive crisis events, the concept of resilience refers to some of the most urgent, challenging, and interesting issues of nowadays society. Economic value networks, technical infrastructures, health systems, and social textures alike need to unfold capacities to withstand, adapt, recover, or even refine and transform themselves to stay ahead of changes

Genetically engineered mouse models of human B-cell precursor leukemias

This is an Open Access article distributed under the terms of the Creative Commons Attribution-Non-Commercial License.B-cell precursor acute lymphoblastic leukemias (pB-ALLs) are the most frequent type of malignancies of the childhood, and also affect an important proportion of adult patients. In spite of their apparent homogeneity, pB-ALL comprises a group of diseases very different both clinically and pathologically, and with very diverse outcomes as a consequence of their biology, and underlying molecular alterations. Their understanding (as a prerequisite for their cure) will require a sustained multidisciplinary effort from professionals coming from many different fields. Among all the available tools for pB-ALL research, the use of animal models stands, as of today, as the most powerful approach, not only for the understanding of the origin and evolution of the disease, but also for the development of new therapies. In this review we go over the most relevant (historically, technically or biologically) genetically engineered mouse models (GEMMs) of human pB-ALLs that have been generated over the last 20 years. Our final aim is to outline the most relevant guidelines that should be followed to generate an “ideal” animal model that could become a standard for the study of human pB-ALL leukemia, and which could be shared among research groups and drug development companies in order to unify criteria for studies like drug testing, analysis of the influence of environmental risk factors, or studying the role of both low-penetrance mutations and cancer susceptibility alterations.This work was supported by the German “Bundesamt fur Strah-lenschutz (BfS)” pilot project on childhood leukemia no. 3612S70029. JH has been supported by the German Children’s Cancer Foundation and from the “Forschungskommission” of the medical faculty of the Heinrich Heine University and the “Strategischer Forschungsfond” of the Heinrich-Heine-University. AB has been supported by the German Children’s Cancer Foundation and the Federal Ministry of Education and Research, Bonn, Germany. Research in ISG group is partially supported by FEDER and by MICINN (SAF2012-32810), by NIH grant (R01 CA109335-04A1), by Junta de Castilla y León (BIO/SA06/13) and by the ARIMMORA project (FP7-ENV-2011, European Union Seventh Framework Program). ISG lab is a member of the EuroSyStem and the DECIDE Network funded by the European Union under the FP7 program. Research at CC’s lab was partially supported by FEDER, Fondo de Investigaciones Sanitarias (PI13/00160), CSIC P.I.E., Junta de Castilla y León, and from an institutional grant from the Fundación Ramón Areces.Peer Reviewe

Dancing on the junction of mathematics and bodily experience

In this experimental paper, we document an experience of artistic research, initiated by searching an answer for the question Is it possible to learn mathematics through dance? . We reflect on three different pathways towards experiencing mathematics in dance: theory, methodology and artistic experience. Following these pathways requires us to challenge established assumptions about mathematics and research and finally allows for exploring the dancing body itself as the potential space of mathematical knowledge. While we remain far from our initial aim of being able to make concrete suggestions about how to integrate dance as an integral part of school mathematics, this article reveals the emancipatory potential of dancing mathematics, facilitating positive experiences with mathematics that hitherto appeared impossible to us

Delta rho pi interaction leading to N* and Delta* resonances

We have performed a calculation for the three body $\Delta \rho \pi$ system by using the fixed center approximation to Faddeev equations, taking the interaction between $\Delta$ and $\rho$, $\Delta$ and$\pi$, and $\rho$ and $\pi$ from the chiral unitary approach. We find several peaks in the modulus squared of the three-body scattering amplitude, indicating the existence of resonances, which can be associated to known $I=1/2, 3/2$ and $J^P=1/2^+, 3/2^+$ and $5/2^+$ baryon states.Comment: Presented at the 21st European Conference on Few-Body Problems in Physics, Salamanca, Spain, 30 August - 3 September 201

eta-photoproduction in the resonance energy region

The $\eta$ production in the nucleon resonance energy region is studied within the unitary coupled-channels effective Lagrangian approach of the Giessen model. We demonstrate that the second peak recently observed in the cross section of $\eta$ photoproduction on the neutron at $\sqrt{s}$=1.66 GeV can be explained in terms of coupled-channel effects due to $S_{11}(1650)$ and $P_{11}(1710)$ resonance excitations