259594 research outputs found
Sort by
Alterung der Aorta - charakterisiert durch multimodale MRT in einer Populationsstudie im 6-Jahres-Follow-up
No full textAccurate Zernike-corrected phase screens for arbitrary power spectra
No full textWave propagation through random continuous media remains an important fundamental problem with applications ranging from remote sensing to quantum communication. Typically, such media are characterized by smooth refractive index fluctuations whose impact on the wave can be captured by the stochastic parabolic equation. The latter can be solved numerically by means of a split-step method, which replaces the continuous medium with a number of discrete phase screens derived from the medium’s power spectrum. We introduce and benchmark highly accurate and efficient hybrid phase screens for arbitrary power spectra, which are based on the combination of Zernike and Fourier phase screens
Impact of apolipoprotein A-I infusions on cardiovascular events post-MI by neutrophil-lymphocyte ratio and LDL-cholesterol levels
No full text
Vertikale bifaziale Agri-Photovoltaik in Baden-Württemberg : eine GIS-gestützte Potenzialanalyse landwirtschaftlicher Flächen
No full textMore than rising water: representing climate change and urban transformation in bangkok wakes to rain
No full textClimate change is a phenomenon of immense and disorienting complexity which challenges the imagination and complicates its representation in literature. Many critics have pointed out the dominance of universalist and anthropocentric crisis narratives in climate fiction, which focus on imagined future events in North America or Europe and understand climate change as a unique and unprecedented event. In contrast, recent publications by postcolonial, indigenous, and diasporic writers illustrate how global power relations inform past, present and future environmental crises and work to reveal the manifold interrelationsbetween humans, nonhumans and the material world. Such works reveal how climate change interacts with other social and environmental justice matters and contribute to a cross‐pollination of climate fiction beyond a Western‐centric imagination. This article discusses Pitchaya Sudbathad's 2019 novel Bangkok Wakes to Rain as an example of contemporary global Anglophone climate fiction which highlights the coexistence of heterogeneous experiences of climate change. While the novel exhibits some features that are commonly found in Anglophone climate fiction, its complex form and narrative structure create a sense of the socially stratified nature and the omnipresence of environmental and urban transformation, which is often absent in Western crisis narratives. The novel illustrates the entangled nature of social, political and ecological concerns and rejects thetotalising pretence of undifferentiated human victimhood in the face of climate change by drawing attention to a plurality of human and more‐than‐human realities
Evidence for a CO2‐concentrating mechanism in the model streptophyte green alga Chara braunii
No full textHow digitalization and artificial intelligence change the mediation of knowledge in medicine
No full textUltra sonic spray coating of silica nanocomposites for smoothening 3D-printed fused silica glass and metal casted injection molding tools
No full text3D printing has gained a lot of interest, enabling the fabrication of complex geometries and the use of a wide range of materials, including glass. However, a major limitation of 3D printing is the surface quality, which often makes it unsuitable for producing optically transparent components. Although a wide range of post-processing methods was explored to enhance surface quality, these techniques have been restricted to polymeric materials and flat or slightly curved surfaces. Recently high-resolution indirect glass 3D printing was introduced by printing glass nanocomposites, which can be subsequently debinded and sintered to transparent fused silica glass. In this work we demonstrate for the first time that optically smooth transparent glass geometries can be achieved by spray coating adapted silica nanocomposites onto the printed parts prior to the thermal heat treatment. The process enables manufacturing of complex, optically transparent fused silica glass geometries with a surface roughness below 16 nm (Sq), using commercially available printers. Furthermore, we demonstrate that these fused silica glass components, once produced and refined, can be effectively adapted for metal casting and the manufacturing of multi-sided injection molding tools. This, significantly enhances prototyping of optical glass components as well as for tool-based manufacturing processes
