On vortex motions in air

n/

Relief for an unquiet mind: Improving outdoor environments for long-term mental health facilities using user-centered design

Master of Landscape ArchitectureDepartment of Landscape Architecture/Regional and Community PlanningSara HadaviOutdoor environments can greatly contribute to the ways people heal, reduce stress, clear their head, and feel integrated or accepted into the environment in which they live. Despite this scientific evidence, in most cases, not enough outdoor spaces are provided to the patients and staff of mental health facilities. Existing therapeutic landscape design guidelines lack specificity related to severe and persistent mental health (SPMI) conditions and spaces for therapy treatments. This study aims to use two environmental psychology frameworks (therapeutic landscape guidelines and the Reasonable Person Model) to begin to develop a set of informed guidelines that can be used to design more supportive outdoor therapeutic environments for staff in mental health facilities. To achieve this goal, the study investigated three mental health hospitals in Kansas through two methods: site inventory and analysis and online/ paper photo surveys. The surveys were based on the literature on therapeutic landscapes and restorative environments as well as mental health symptoms to identify which guidelines are specific to mental health and which are generally applicable to all healing spaces. The final objective is to discover the environmental needs and preference of mental healthcare setting users. Findings from the site analysis and surveys were applied to a projective design at one of the three study sites- Osawatomie State Hospital. 140 responses from staff and 14 responses from patients were collected through the survey. Because there were not enough patient surveys collected to be statistically reliable, only the data collected from the staff was used in the projective design. Overall, by linking psychology principles and landscape architecture, this study aims to take a step toward developing a set of evidence-based planning and design guidelines to create supportive outdoor spaces that better meet the needs of the patients and staff of mental health hospitals, aiding in the therapeutic process for the staff over time

Erwachsenenbildungszentren in Mali: Erfahrungen und Konzepte in und nach der Krise

In dem Beitrag werden die Erfahrungen von Bildungsarbeit in (Post-)Krisenregionen am Beispiel der Arbeit von DVV International in Mali vorgestellt. Erwachsenenbildungszentren, so eine Erkenntnis, können erfolgreich ganzheitliche Bildungsangebote anbieten. Darüber hinaus werden Gelingensbedingungen und Erfolgsfaktoren dargelegt.Adult education centres in Mali. Experience and concepts during and after the crisis The article presents experiences gained in educational work in (post) crisis areas based on the work conducted by the DVV in Mali. According to the findings, adult education centres can be successful providers of holistic education programmes. In addition, conditions and factors for success are presented

Geschichte des Physikalischen Instituts der Universität Heidelberg

Entwicklung des Physikalisches Instituts der Universität Heidelberg von der Mitte des 16. Jahrhunderts bis zur Mitte des 19. Jahrhunderts

DC-conductivity of a suspension of insulating particles with internal rotation

We analyse the consequences of Quincke rotation on the conductivity of a suspension. Quincke rotation refers to the spontaneous rotation of insulating particles dispersed in a slightly conducting liquid and subject to a high DC electric field: above a critical field, each particle rotates continuously around itself with an axis pointing in any direction perpendicular to the DC field. When the suspension is subject to an electric field lower than the threshold one, the presence of insulating particles in the host liquid decreases the bulk conductivity since the particles form obstacles to ion migration. But for electric fields higher than the critical one, the particles rotate and facilitate ion migration: the effective conductivity of the suspension is increased. We provide a theoretical analysis of the impact of Quincke rotation on the apparent conductivity of a suspension and we present experimental results obtained with a suspension of PMMA particles dispersed in weakly conducting liquids

Ueber die Capillaritäts-Constanten fester Körper

n/

Quantitative trait loci analysis for resistance to Cephalosporium stripe, a vascular wilt disease of wheat

Cephalosporium stripe, caused by Cephalosporium gramineum, can cause severe loss of wheat (Triticum aestivum L.) yield and grain quality and can be an important factor limiting adoption of conservation tillage practices. Selecting for resistance to Cephalosporium stripe is problematic; however, as optimum conditions for disease do not occur annually under natural conditions, inoculum levels can be spatially heterogeneous, and little is known about the inheritance of resistance. A population of 268 recombinant inbred lines (RILs) derived from a cross between two wheat cultivars was characterized using field screening and molecular markers to investigate the inheritance of resistance to Cephalosporium stripe. Whiteheads (sterile heads caused by pathogen infection) were measured on each RIL in three field environments under artificially inoculated conditions. A linkage map for this population was created based on 204 SSR and DArT markers. A total of 36 linkage groups were resolved, representing portions of all chromosomes except for chromosome 1D, which lacked a sufficient number of polymorphic markers. Quantitative trait locus (QTL) analysis identified seven regions associated with resistance to Cephalosporium stripe, with approximately equal additive effects. Four QTL derived from the more susceptible parent (Brundage) and three came from the more resistant parent (Coda), but the cumulative, additive effect of QTL from Coda was greater than that of Brundage. Additivity of QTL effects was confirmed through regression analysis and demonstrates the advantage of accumulating multiple QTL allelesto achieve high levels of resistanc

Electric-field-induced transport of microspheres in the isotropic and chiral nematic phase of liquid crystals

The application of an electric field to microspheres suspended in a liquid crystal, causes particle translation in a plane perpendicular to the applied field direction. Depending on applied electric field amplitude and frequency, a wealth of different motion modes may be observed above a threshold, which can lead to linear, circular or random particle trajectories. We present the stability diagram for these different translational modes of particles suspended in the isotropic and the chiral nematic phase of a liquid crystal, and investigate the angular velocity, circular diameter, and linear velocity as a function of electric field amplitude and frequency. In the isotropic phase a narrow field amplitude-frequency regime is observed to exhibit circular particle motion whose angular velocity increases with applied electric field amplitude, but is independent of applied frequency. The diameter of the circular trajectory decreases with field amplitudes as well as frequency. In the cholesteric phase linear as well as circular particle motion is observed. The former exhibits an increasing velocity with field amplitude, while decreasing with frequency. For the latter, the angular velocity exhibits an increase with field amplitude and frequency. The rotational sense of the particles on a circular trajectory in the chiral nematic phase is independent of the helicity of the liquid crystalline structure, as is demonstrated by employing a cholesteric twist inversion compound