Physical oceanography during POLARSTERN cruise ANT-V/3

The work carried out by the physical oceanography group on POLARSTERN Leg ANT-V/3 concentrated on four major topics: A. A large scale survey of the eastern boundary between the Weddell gyre and the open ocean. On the way to the coastal polynya in early October 12 CTD stations were carried out between 54°30'S, 6°E and 70°30'S 8°W. Another set of 16 stations was obtained in early December on the way back north. During this transsect three current meter moorings were recovered at Maud Rise. The path between the current meter arrays was used to run an additional section to the NNE across the top of Maud Rise. B. A large scale survey of the Antarctic Coastal Current along the eastern shelf area. To obtain the water mass characteristics along the eastern Weddell shelf 36 CTD stations were carried out between Atka Bay and the Filchner Trench. Most of the stations were located on the shelf. Cross shelf sections were obtained both near Drescher Inlet and off Halley Bay, in the divergence area of the Coastal Current where the continental slope turns to the west and south of Vestkapp at Neptune's Point. A longshore section over 120 km was run north of Vestkapp. C. A mesoscale survey of the Antarctic Coastal Current off Drescher Inlet. The experimental work consisted of 37 CTD-stations and direct current measurements. The CTD-profiles were grouped into seven sections perpendicular to the coast line off Drescher Inlet extending once over 70 km but normally over 35 km. The profile depth ranged from 300 m on one section to the complete water column at two sections. Most sections consist of five stations providing highest resolution over the upper continental slope with offshore increasing spacing. The stations were chosen to represent the shelf (450 m), the shelf break (800 m), the upper slope (1600 m), the lower slope (2400 m) and the transition to the abyssal plain (3400 m). Rough topography and difficult ice conditions made it impossible to meet those requirements in all cases. D. A small scale survey of the hydrographic conditions under the sea ice. The motivation for these studies arose during the cruise. Consequently a suitable Instrumentation had to be developed at sea. This was done with a NB-Smart CTD which was inserted on an L-shaped lever through a hole in the ice. However, various water intrusions into the instrument resulted in the failure of this technique. In consequence a special lever system was built to position a NB Mark 3b weighing about 40 kg below the ice. Twenty four profiles were obtained reaching from the bottom of the ice down to 2 m below the ice surface with a maximum distance of 1 m from the entry hole. As the conductivity sensor was influenced by nearby ice platelets, salinity samples where drawn to check the sensor.

Downwelling spectral irradiance as measured in different depths, remote sensing reflectance and phytoplankton pigment concentration during POLARSTERN cruises ANT-XXIV/1, ANT-XXIV/4, ANT-XXVI/4 and Maria S. Merian cruise MSM18/3

The composition and abundance of algal pigments provide information on phytoplankton community characteristics such as photoacclimation, overall biomass and taxonomic composition. In particular, pigments play a major role in photoprotection and in the light-driven part of photosynthesis. Most phytoplankton pigments can be measured by high-performance liquid chromatography (HPLC) techniques applied to filtered water samples. This method, as well as other laboratory analyses, is time consuming and therefore limits the number of samples that can be processed in a given time. In order to receive information on phytoplankton pigment composition with a higher temporal and spatial resolution, we have developed a method to assess pigment concentrations from continuous optical measurements. The method applies an empirical orthogonal function (EOF) analysis to remote-sensing reflectance data derived from ship-based hyperspectral underwater radiometry and from multispectral satellite data (using the Medium Resolution Imaging Spectrometer - MERIS - Polymer product developed by Steinmetz et al., 2011, doi:10.1364/OE.19.009783) measured in the Atlantic Ocean. Subsequently we developed multiple linear regression models with measured (collocated) pigment concentrations as the response variable and EOF loadings as predictor variables. The model results show that surface concentrations of a suite of pigments and pigment groups can be well predicted from the ship-based reflectance measurements, even when only a multispectral resolution is chosen (i.e., eight bands, similar to those used by MERIS). Based on the MERIS reflectance data, concentrations of total and monovinyl chlorophyll a and the groups of photoprotective and photosynthetic carotenoids can be predicted with high quality. As a demonstration of the utility of the approach, the fitted model based on satellite reflectance data as input was applied to 1 month of MERIS Polymer data to predict the concentration of those pigment groups for the whole eastern tropical Atlantic area. Bootstrapping explorations of cross-validation error indicate that the method can produce reliable predictions with relatively small data sets (e.g., < 50 collocated values of reflectance and pigment concentration). The method allows for the derivation of time series from continuous reflectance data of various pigment groups at various regions, which can be used to study variability and change of phytoplankton composition and photophysiology.

“Digital Diagnostics and Communication (DDC) system” Redesigning the Emergency Ambulance

During the development of a new treatment space for the UK emergency ambulance participatory observations with front-line clinicians revealed the need for an integrated patient monitoring, communication and navigation system. The research identified the different information touch-points and requirements through modes of use analysis, day-in-the-life study and simulation workshops with clinicians. Emergency scenario and role-play with paramedics identified 5 distinct ambulance modes of use. Information flow diagrams were created and checked by paramedics and digital User Interface (UI) wireframes were developed and evaluated by clinicians during clinical evaluations. Feedback from clinicians defined UI design specification further leading to a final design proposal. This research was a further development from the 2007 EPSRC funded “Smart Pods” project. The resulting interactive prototype was co-designed in collaboration with ambulance crews and provides a vision of what could be achieved by integrating well-proven IT technologies and protocols into a package relevant in the emergency medicine field. The system has been reviewed by over 40 ambulance crews and is part of a newly co-designed ambulance treatment space.

Klaus-Peter Horn / Heidemarie Kemnitz / Winfried Marotzki / Uwe Sandfuchs (Hrsg.): Klinkhardt Lexikon Erziehungswissenschaft, 3 Bände im Schuber, Bad Heilbrunn: Klinkhardt 2011 [Rezension]

Rezension von: Klaus-Peter Horn / Heidemarie Kemnitz / Winfried Marotzki / Uwe Sandfuchs (Hrsg.): Klinkhardt Lexikon Erziehungswissenschaft, 3 Bände im Schuber, Bad Heilbrunn: Klinkhardt 2011 (1.509 S.; ISBN 978-3-8252-8468-8; 99,00 EUR)

Gutes Lernen und gute Lehre. Welchen Beitrag leistet die Qualitätssicherung. Beiträge zur 3. AQ Austria Jahrestagung 2015

Die Publikation zur AQ Austria Jahrestagung 2015 widmet sich dem Lernen und Lehren an Hochschulen und den vielfältigen Wandlungsprozessen durch die zunehmende biographische, soziale und kulturelle Diversität der Studierenden sowie elektronischen Medien. Student-centred Learning (SCL) gewinnt verstärkt an Bedeutung. Diese Wandlungsprozesse treffen nicht nur Studierende, Lehrende und die Hochschulen als Institutionen, auch die Qualitätssicherung in Studium und Lehre. Der Beitrag von Prof. Nacken zeigt auf, welche Chancen und Herausforderungen sich durch SCL in verschiedensten Bereichen ergeben. Er geht auf das Projekt „Studierende im Fokus der Exzellenz“, die Entwicklung der Charta für gute Lehre und aktuelle Trends und Probleme bei digitaler Lehre ein. Die studentische Perspektive zeigt Umsetzungsmöglichkeiten und Maßnahmen in Richtung Studierendenzentrierung auf. In den weiteren Beiträgen wird auf Didaktik und Qualitätssicherung, Determinanten studentischen Lernerfolgs, alternative Formen der Lehrevaluation und die Sichtbarmachung von non-formal und informell erworbenen Kompetenzen eingegangen und zwei beschäftigen sich mit Einsatzmöglichkeiten und Veränderungen durch neue Medien. Mit Beiträgen von: Nacken, Heribert; Hanft, Anke; Pichl, Elmar; Treml, Beate; Pellert, Ada; Künzel, Manfred; Haas, Lena; Martens, Thomas; Metzger, Christiane; Haag, Johann; Froschauer-Neuhauser, Elisabeth; Meyer Richli, Christine; Schulz, Ramona; Kämmerer, Frauke; Gornik, Elke A.; Freiberger, Diane; Birke, Barbara; Müller, Claude; Woschnack, Ute; Baumgartner, Alexander; Erlemann, Jennifer; Penßler-Beyer, Anja; Bergsmann, Evelyn; Weißemböck, Josef.

Editorial. Sprachliche Bildung von 3-bis 8-jährigen Kindern

Die Autoren führen in den Themenschwerpunkt des Heftes ein. "Die Beiträge [dieses Heftes] beziehen sich auf die sprachliche Bildung von Kindern im Alter von 3-8 Jahren. Sie befassen sich auf der Grundlage empirischer Untersuchungen mit sprachlichen Fähigkeiten von Kindern in mehrsprachigen Kontexten sowie mit Praktiken der Sprachförderung in verschiedenen Bildungseinrichtungen." (DIPF/Orig.)

Editorial. L’éducation langagière des enfants de 3 à 8 ans

Ce journal consacré à l’éducation langagière des enfants de 3 à 8 ans. Il présente des résultats de recherches empiriques sur les capacités langagières d’enfants et d’élèves en contexte multilingue mais également sur les pratiques de promotion langagière dans différentes institutions éducatives. L’analyse des capacités langagières orales en fonction de genres de textes oraux, la prise en considération de multiples facettes du plurilinguisme, l’étude de l’action des enseignants et du personnel éducatif dans les interactions quotidiennes avec les enfants, les enjeux du passage du préscolaire au primaire en termes de processus de reproduction et de construction d’inégalités éducatives apparaissent comme autant d’axes de réflexion ouverts par ce numéro. (DIPF/Orig.)

Die Anwendung des 3-2-1 Modells didaktischer Elemente in der Hochschulpraxis

Im Verlauf einer universitätsweiten Förderinitiative wurde für die Lehrveranstaltung Betonbau ein Projekt durchgeführt, das mithilfe Neuer Medien versucht, die Lehre an der Hochschule nachhaltig zu verbessern. In dieser Veröffentlichung wird über die Entwicklung von interaktiven Lernobjekten (ILO) berichtet, die streng nach den Gesichtspunkten des 3-2-1 Modells didaktischer Elemente nach Kerres (2001) aufgebaut wurden. Die Umsetzung, sowohl in technischer als auch didaktischer Hinsicht, sowie die Implementierung im Curriculum wird detailliert beschrieben. Eine Diskussion über eine mögliche Effizienzsteigerung in der Lehre rundet diese Veröffentlichung ab.(DIPF/Orig.)

The D(D-3)-anyon chain: integrable boundary conditions and excitation spectra

Chains of interacting non-Abelian anyons with local interactions invariant under the action of the Drinfeld double of the dihedral group D-3 are constructed. Formulated as a spin chain the Hamiltonians are generated from commuting transfer matrices of an integrable vertex model for periodic and braided as well as open boundaries. A different anyonic model with the same local Hamiltonian is obtained within the fusion path formulation. This model is shown to be related to an integrable fusion interaction round the face model. Bulk and surface properties of the anyon chain are computed from the Bethe equations for the spin chain. The low-energy effective theories and operator content of the models (in both the spin chain and fusion path formulation) are identified from analytical and numerical studies of the finite-size spectra. For all boundary conditions considered the continuum theory is found to be a product of two conformal field theories. Depending on the coupling constants the factors can be a Z(4) parafermion or a M-(5,M-6) minimal model.

A proposal for self-correcting stabilizer quantum memories in 3 dimensions (or slightly less)

We propose a family of local CSS stabilizer codes as possible candidates for self-correcting quantum memories in 3D. The construction is inspired by the classical Ising model on a Sierpinski carpet fractal, which acts as a classical self-correcting memory. Our models are naturally defined on fractal subsets of a 4D hypercubic lattice with Hausdorff dimension less than 3. Though this does not imply that these models can be realized with local interactions in R3, we also discuss this possibility. The X and Z sectors of the code are dual to one another, and we show that there exists a finite temperature phase transition associated with each of these sectors, providing evidence that the system may robustly store quantum information at finite temperature.

Symmetry reduction due to gallium substitution in the garnet Li6.43(2)Ga0.52(3)La2.67(4)Zr2O12

Single-crystal structure refinements on lithium lanthanum zirconate (LLZO; Li7La3Zr2O12) substituted with gallium were successfully carried out in the cubic symmetry space group I [Formula: see text]3d. Gallium was found on two lithium sites as well as on the lanthanum position. Due to the structural distortion of the resulting Li6.43(2)Ga0.52(3)La2.67(4)Zr2O12 (Ga-LLZO) single crystals, a reduction of the LLZO cubic garnet symmetry from Ia[Formula: see text] d to I [Formula: see text]3d was necessary, which could hardly be analysed from X-ray powder diffraction data.