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Übergangsgestaltung als neue Anforderung an die Professionalität der pädagogischen Fachkräfte
(2014)
§296 HGB
(2014)
§290 HGB
(2014)
Zum Lernen verdammt
(2014)
Mit wenigen Ausnahmen wird im elektrischen Versorgungssystem die Pumpspeichertechnik zur Pufferung größerer Abweichungen zwischen momentanem Stromverbrauch und -erzeugung und zur zeitlichen Verschiebung von Lasten eingesetzt. Erste großtechnische Anlagen wurden bereits Ende der zwanziger Jahre des letzten Jahrhunderts in Deutschland gebaut, um die Auslastung thermischer Kraftwerke gleichmäßiger zu ermöglichen. Pumpspeicherwerke bieten sich somit als Referenztechnologie an, mit der sich neue Entwicklungen messen müssen. Ein Überblick.
Wertvoller Abfall
(2014)
WebQuest
(2014)
In Germany, the situation of health care services for children and adolescents with gender dysphoria is insufficient. In 2006 a specialized multiprofessional outpatient clinic was founded at the University Medical Center Hamburg-Eppendorf. Goals were improvement of health services for gender dysphoric children, development of treatment concepts, and gain of knowledge through research. After finishing a thorough interdisciplinary assessment an individualized, case-by-case treatment starts. Besides psychotherapy an interdisciplinary treatment (e. g. puberty suppression and cross-sex hormones) is provided if indicated. During childhood a watchful waiting and carefully observing attitude is necessary. If a marked increase of gender dysphoria occurs during the first phases of puberty development, puberty suppression and later cross sex-hormones might be indicated.
Veganismus
(2014)
Veblen’s concept of conspicuous consumption is often cited to explain why consumption habits in our consumer societies tend to be unsustainable and ever increasing. However, much more than blaming individual consumption habits Veblen sharply analyzed quite some of the societal and economic forces which drive the framework conditions for un-sustainable consumption: the vested interests and the absentee ownership. The paper follows the path Veblen’s thoughts have taken trough economic and social literature over the last centuryand highlights how the actual sustainable consumption debate could make better use of Veblen’s insights e.g. in requesting the constitutive institutions for property. Opportunities for Strong Sustainable Consumption obviously presuppose radical changes, social innovations and thinking out of the box.
An experimental investigation of supercritical uniform and gradually varied open channel flows is presented for a wide range of Froude numbers and flume width-to-flow depth aspect ratios. The instantaneous streamwise and vertical flow velocities were measured in a laboratory flume over the entire width using a two dimensional–laser Doppler anemometry (2D-LDA) system to determine turbulence intensities, and bed and Reynolds shear stresses. The mean velocity patterns show undulation across the flume, indicating the presence of counterrotating secondary current cells. These currents redistribute turbulence intensities and bed and Reynolds shear stresses across the flume. For aspect ratios ≤ 4−5, i.e., narrow open channel flow, the velocity-dip phenomenon is identified both in the streamwise velocity and the Reynolds shear stress distributions. For high aspect ratios, i.e., wide open channel flow, the strength of secondary currents diminish toward the flume center, resulting in a 2D flow farther away from the walls and no velocity-dip phenomenon. Froude number effects on the flow characteristics are less pronounced compared to the aspect ratio effects. At high Froude numbers, the results for narrow and wide open channel flows agree well with literature data. The log-law holds in the inner region across the entire flume width for all investigated Froude numbers and aspect ratios. The Reynolds shear stress distribution agrees well with the computed spanwise bed shear stress distribution. At the flume side walls, the bed shear stresses are 20–50 % higher than the mean values. These results are verified with an engineering example in which high sediment transport and corresponding deep abrasion patterns at the side walls were observed.