A note on the spectra of certain skew-symmetric {1,0,−1}-matrices

AbstractWe characterize skew-symmetric {1,0,−1}-matrices with a certain combinatorial property. In particular, we exhibit several equivalent descriptions of this property. These results allow characterizations of unimodular orientations of the complete graph, of rank 2 chirotopes, and of a class of multipartite oriented graphs

Investigation of shear stress and shear flow within a partonic transport model

Starting from a classical picture of shear viscosity we construct a steady velocity gradient in the partonic cascade BAMPS. Using the Navier-Stokes-equation we calculate the shear viscosity coefficient. For elastic isotropic scatterings we find a very good agreement with the analytic values. For both elastic and inelastic scatterings with pQCD cross sections we find good agreement with previously published calculations

Kinetics of the chiral phase transition in a linear σ\sigma model

We study the dynamics of the chiral phase transition in a linear quark-meson $\sigma$ model using a novel approach based on semiclassical wave-particle duality. The quarks are treated as test particles in a Monte-Carlo simulation of elastic collisions and the coupling to the $\sigma$ meson, which is treated as a classical field. The exchange of energy and momentum between particles and fields is described in terms of appropriate Gaussian wave packets. It has been demonstrated that energy-momentum conservation and the principle of detailed balance are fulfilled, and that the dynamics leads to the correct equilibrium limit. First schematic studies of the dynamics of matter produced in heavy-ion collisions are presented.Comment: 15 pages, 12 figures, accepted by EPJA, dedicated to memory of Walter Greiner; v2: corrected typos, added references and an acknowledgmen

Dissipative hydrodynamics for multi-component systems

Second-order dissipative hydrodynamic equations for each component of a multi-component system are derived using the entropy principle. Comparison of the solutions with kinetic transport results demonstrates validity of the obtained equations. We demonstrate how the shear viscosity of the total system can be calculated in terms of the involved cross sections and partial densities. Presence of the inter-species interactions leads to a characteristic time-dependence of the shear viscosity of the mixture, which also means that the shear viscosity of a mixture cannot be calculated using the Green-Kubo formalism the way it has been done recently. This finding is of interest for understanding of the shear viscosity of a quark-gluon-plasme extracted from comparisons of hydrodynamic simulations with experimental results from RHIC and LHC.Comment: 5 pages, 3 figures. Submitted to EPJA topical issue on "Relativistic Hydro- and Thermodynamics". arXiv admin note: text overlap with arXiv:1103.403

It’s a Process: A Qualitative Study About the Resistance and Resilience of Transgender Youth of Color Navigating Parent/guardian Support and Societal Oppressions

Transgender youth of color experience alarming rates of marginalization and victimization within society, including experiences of rejection from parents/ guardians, which has been associated with various adverse health outcomes. Health care providers are encouraged to facilitate parent/guardian support for transgender youth to improve long term health, however nurses report feeling underprepared to care for transgender populations and nursing transgender health research is lacking. Therefore, the purpose of this study was to describe how transgender youth of color experience and navigate parent/guardian support, considering the broader societal context. This study was informed by critical and intersectionality theory. A qualitative secondary approach was used to analyze previously collected semi-structured qualitative interviews from a nation-wide study with transgender youth (n=24). Data was analyzed using narrative inquiry to describe stories of transgender youth of color age 16-18 years and their experiences regarding parent/guardian support related to their overall health and well-being, while navigating intersecting marginalization. The overarching theme It’s a Process described the ways that transgender youth of color navigated various barriers and milestones in pursuit of living their lives with authenticity. Additional subthemes emerged, including We Need Your Help, I’m Lucky to Have Support, Self-Advocacy/Resistance, and Having Hope/Resilience. This study was the first to explore the pivotal experiences of transgender youth turning 18, a turning point when youth were finally able to consent for their own health care, but may face limited access if still on their parent/guardian’s insurance without parent/guardian support. Findings of this study have important implications for nursing education, practice, and research as well as health care policy. Increased understanding about the ways transgender youth of color navigate intersecting barriers can improve nursing education and clinical care. Future research can develop clinical tools that will facilitate resistance and resilience processes for transgender youth of color, as well as parent/guardian support, ensuring culturally and developmentally appropriate interventions. Future research can also explore the structural causes of health inequities found in this study to inform policy change