@article{RottmannSynstadEijsinketal.1999, author = {Rottmann, Antje and Synstad, Bjoenar and Eijsink, Vincent G. H. and Peter, Martin G.}, title = {Synthesis of N-acetylglucosaminyl and diacetylchitobiosyl amides of heterocyclic carboxylic acids as potential chitinase inhibitors}, year = {1999}, language = {en} } @article{RottmannSynstadThieleetal.1999, author = {Rottmann, Antje and Synstad, Bjoenar and Thiele, G. and Schanzenbach, Dirk and Eijsink, Vincent G. H. and Peter, Martin G.}, title = {Approaches towards the design of new chitinase inhibitors}, isbn = {3-9806494-5-8}, year = {1999}, language = {en} } @book{Rottnick2011, author = {Rottnick, Lukas}, title = {Starke Ortsteile f{\"u}r Brandenburg? : Strategien f{\"u}r Ortsbeir{\"a}te}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-094-6}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-46461}, publisher = {Universit{\"a}t Potsdam}, pages = {102}, year = {2011}, abstract = {Im Zuge der im Jahre 2003 abgeschlossenen brandenburgischen Gemeindegebietsreform verloren zahlreiche Gemeinden ihre Selbst{\"a}ndigkeit und wurden zu Ortsteilen. Um negative Auswirkungen dieses Zentralisierungsprozesses auf B{\"u}rgern{\"a}he und lokale Demokratie zu vermeiden, wertete der Landesgesetzgeber gleichzeitig die Stellung der Ortsteile in der Gemeindeordnung auf. Die vorliegende Arbeit entstand gegen Ende der ersten Legislaturperiode in den neuen Strukturen und untersucht im Anschluß an generelle {\"U}berlegungen zu lokaler Demokratie und dezentralen Organismen die M{\"o}glichkeiten der Ortsbeir{\"a}te und -b{\"u}rgermeister, sich in den kommunalen Entscheidungsprozessen der Einheitsgemeinden zu behaupten. Hierzu wurde eine Auswahl brandenburgischer Ortsb{\"u}rgermeister schriftlich befragt. Im Ergebnis zeigt sich, daß die Ortsbeir{\"a}te und -b{\"u}rgermeister zwar nur {\"a}ußerst sp{\"a}rlich mit institutionellen Rechten ausgestattet sind, ihre Funktion f{\"u}r die lokale Demokratie aber vor allem durch informelle Einflußnahme erf{\"u}llen k{\"o}nnen.}, language = {de} } @phdthesis{Rottstock2016, author = {Rottstock, Tanja}, title = {Effects of plant community diversity and composition on fungal pathogens in experimental grasslands}, school = {Universit{\"a}t Potsdam}, pages = {139}, year = {2016}, language = {en} } @article{RottstockJoshiKummeretal.2014, author = {Rottstock, Tanja and Joshi, Jasmin Radha and Kummer, Volker and Fischer, Markus}, title = {Higher plant diversity promotes higher diversity of fungal pathogens, while it decreases pathogen infection per plant}, series = {Ecology : a publication of the Ecological Society of America}, volume = {95}, journal = {Ecology : a publication of the Ecological Society of America}, number = {7}, publisher = {Wiley}, address = {Washington}, issn = {0012-9658}, pages = {1907 -- 1917}, year = {2014}, abstract = {Fungal plant pathogens are common in natural communities where they affect plant physiology, plant survival, and biomass production. Conversely, pathogen transmission and infection may be regulated by plant community characteristics such as plant species diversity and functional composition that favor pathogen diversity through increases in host diversity while simultaneously reducing pathogen infection via increased variability in host density and spatial heterogeneity. Therefore, a comprehensive understanding of multi-host multi-pathogen interactions is of high significance in the context of biodiversity-ecosystem functioning. We investigated the relationship between plant diversity and aboveground obligate parasitic fungal pathogen ("pathogens" hereafter) diversity and infection in grasslands of a long-term, large-scale, biodiversity experiment with varying plant species (1-60 species) and plant functional group diversity (1-4 groups). To estimate pathogen infection of the plant communities, we visually assessed pathogen-group presence (i.e., rusts, powdery mildews, downy mildews, smuts, and leaf-spot diseases) and overall infection levels (combining incidence and severity of each pathogen group) in 82 experimental plots on all aboveground organs of all plant species per plot during four surveys in 2006. Pathogen diversity, assessed as the cumulative number of pathogen groups on all plant species per plot, increased log-linearly with plant species diversity. However, pathogen incidence and severity, and hence overall infection, decreased with increasing plant species diversity. In addition, co-infection of plant individuals by two or more pathogen groups was less likely with increasing plant community diversity. We conclude that plant community diversity promotes pathogen-community diversity while at the same time reducing pathogen infection levels of plant individuals.}, language = {en} } @article{RottstockKummerFischeretal.2017, author = {Rottstock, Tanja and Kummer, Volker and Fischer, Markus and Joshi, Jasmin Radha}, title = {Rapid transgenerational effects in Knautia arvensis in response to plant community diversity}, series = {The journal of ecology}, volume = {105}, journal = {The journal of ecology}, publisher = {Wiley}, address = {Hoboken}, issn = {0022-0477}, doi = {10.1111/1365-2745.12689}, pages = {714 -- 725}, year = {2017}, abstract = {1. Plant species persistence in natural communities requires coping with biotic and abiotic challenges. These challenges also depend on plant community composition and diversity. Over time, biodiversity effects have been shown to be strengthened via increasing species complementarity in mixtures. Little is known, however, whether differences in community diversity and composition induce rapid transgenerational phenotypic adaptive differentiation during community assembly. We expect altered plant-plant and other biotic interactions (mutualists or antagonists) in high vs. low diverse communities to affect immediate within-and between-species trait differentiations due to competition for light and nutrients. 2. Three years after the initiation of a large-scale, long-term biodiversity experiment in Jena, Germany, we tested for effects of varying experimental plant community diversity (1-60 plant species; one to four plant functional groups) and composition (with or without legumes and/or grasses) on phenotypic differentiation and variation of the tall herb Knautia arvensis. We measured reproduction at different diversity levels in the Jena Experiment (residents hereafter) and, in an additional common garden experiment without competition, recorded subsequent offspring performance (i.e. growth, reproductive success and susceptibility to powdery mildew) to test for differentiation in phenotypic expression and variability. 3. We observed phenotypic differences among diversity levels with reduced fecundity of K. arvensis residents in more diverse communities. In the next generation grown under common garden conditions, offspring from high-diversity plots showed reduced growth (i.e. height) and lower reproduction (i.e. fewer infructescences), but increased phenotypic trait variability (e.g. in leaf width and powdery mildew presence) and also tended to be less susceptible to powdery mildew infection. 4. Community composition also affected Knautia parents and offspring. In the presence of legumes, resident plants produced more seeds (increased fecundity); however, germination rate of those seeds was reduced at an early seedling stage (reduced fertility). 5. Synthesis. We conclude that rapid transgenerational effects of community diversity and composition on both mean and variation of phenotypic traits among offspring exist. In addition to heritable variation, environmentally induced epigenetic and/or maternal processes matter for early plant community assembly and may also determine future species coexistence and community stability.}, language = {en} } @article{RoudWackGilderetal.2021, author = {Roud, Sophie and Wack, Michael Richard and Gilder, Stuart A. and Kudriavtseva, Anna and Sobel, Edward}, title = {Miocene to early pleistocene depositional history and tectonic evolution of the Issyk-Kul Basin, Central Tian Shan}, series = {Geochemistry, geophysics, geosystems : G 3 ; an electronic journal of the earth sciences}, volume = {22}, journal = {Geochemistry, geophysics, geosystems : G 3 ; an electronic journal of the earth sciences}, number = {4}, publisher = {Wiley}, address = {Hoboken, NJ}, issn = {1525-2027}, doi = {10.1029/2020GC009556}, pages = {16}, year = {2021}, abstract = {The Issyk-Kul Basin (Kyrgyzstan), situated in the central Tian Shan Mountains, hosts the largest and deepest mountain lake in Central Asia. Erosion of the surrounding Terskey and Kungey ranges led to the accumulation of up to 4 km of sediment in the adjacent depression. Creation of the basin from regional shortening and uplift likely initiated around the Oligocene-Miocene, yet precise age control is sparse. To better understand the timing of these processes, we obtained magnetostratigraphic age constraints on fossil-poor, fluvio-lacustrine sediments exposed south of Lake Issyk-Kul, that agree well with previous age constraints of the equivalent strata outside the Issyk-Kul Basin. Two 500-650 m thick sections comprised mainly of Chu Group sediments were dated at 6.3-2.8 Ma and 7.0-2.4 Ma (late Miocene to early Pleistocene). Together with reinterpreted magnetostratigraphic constraints from underlying strata, we find that syn-tectonic deposition commenced at similar to 22 Ma with average sedimentation rates <10 cm/ka. Sedimentation rates increased to 10-30 cm/ka at 7 Ma, concurrent with accelerated uplift in the Terskey Range to the south. A deformation event in one section (Kaji-Say) between 5 and 3 Ma together with concurrent shifts of depositional centers throughout the basin signal the onset of substantial uplift of the Kungey Range to the north at similar to 5 Ma. This uplift and deformation transformed the Issyk-Kul area into a closed basin that facilitated the formation of a deep lake. Lacustrine facies deposited around 3 Ma mark the existence of Lake Issyk-Kul by that time.}, language = {en} } @article{Roul2011, author = {Roul, Pradip}, title = {Numerical solutions of time fractional degenerate parabolic equations by variational iteration method with Jumarie-modified Riemann-Liouville derivative}, series = {Mathematical methods in the applied sciences}, volume = {34}, journal = {Mathematical methods in the applied sciences}, number = {9}, publisher = {Wiley-Blackwell}, address = {Malden}, issn = {0170-4214}, doi = {10.1002/mma.1418}, pages = {1025 -- 1035}, year = {2011}, abstract = {In this article, the fractional variational iteration method is employed for computing the approximate analytical solutions of degenerate parabolic equations with fractional time derivative. The time-fractional derivatives are described by the use of a new approach, the so-called Jumarie modified Riemann-Liouville derivative, instead in the sense of Caputo. The approximate solutions of our model problem are calculated in the form of convergent series with easily computable components. Moreover, the numerical solution is compared with the exact solution and the quantitative estimate of accuracy is obtained. The results of the study reveal that the proposed method with modified fractional Riemann-Liouville derivatives is efficient, accurate, and convenient for solving the fractional partial differential equations in multi-dimensional spaces without using any linearization, perturbation or restrictive assumptions.}, language = {en} } @article{RoulSchinnerKassner2011, author = {Roul, Pradip and Schinner, Alexander and Kassner, Klaus}, title = {Simulation of the strain distribution under a two-dimensional sand pile}, series = {Powder technology : an international journal on the science and technology of wet and dry particulate systems}, volume = {214}, journal = {Powder technology : an international journal on the science and technology of wet and dry particulate systems}, number = {3}, publisher = {Elsevier}, address = {Lausanne}, issn = {0032-5910}, doi = {10.1016/j.powtec.2011.08.039}, pages = {406 -- 414}, year = {2011}, abstract = {We study the averaged macroscopic strain tensor for a sand pile consisting of soft convex polygonal particles numerically, using the discrete-element method (DEM). First, we construct two types of "sand piles" by two different pouring protocols. Afterwards, we deform the sand piles, relaxing them under a 10\% reduction of gravity. Four different types of methods, three best-fit strains and a derivative strain, are adopted for determining the strain distribution under a sand pile. The results of four different versions of strains obtained from DEM simulation are compared with each other. Moreover, we compare the vertical normal strain tensor between two types of sand piles qualitatively and show how the construction history of the piles affects their strain distribution.}, language = {en} } @phdthesis{Roumen2023, author = {Roumen, Thijs}, title = {Portable models for laser cutting}, doi = {10.25932/publishup-57814}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-578141}, school = {Universit{\"a}t Potsdam}, pages = {xx, 170}, year = {2023}, abstract = {Laser cutting is a fast and precise fabrication process. This makes laser cutting a powerful process in custom industrial production. Since the patents on the original technology started to expire, a growing community of tech-enthusiasts embraced the technology and started sharing the models they fabricate online. Surprisingly, the shared models appear to largely be one-offs (e.g., they proudly showcase what a single person can make in one afternoon). For laser cutting to become a relevant mainstream phenomenon (as opposed to the current tech enthusiasts and industry users), it is crucial to enable users to reproduce models made by more experienced modelers, and to build on the work of others instead of creating one-offs. We create a technological basis that allows users to build on the work of others—a progression that is currently held back by the use of exchange formats that disregard mechanical differences between machines and therefore overlook implications with respect to how well parts fit together mechanically (aka engineering fit). For the field to progress, we need a machine-independent sharing infrastructure. In this thesis, we outline three approaches that together get us closer to this: (1) 2D cutting plans that are tolerant to machine variations. Our initial take is a minimally invasive approach: replacing machine-specific elements in cutting plans with more tolerant elements using mechanical hacks like springs and wedges. The resulting models fabricate on any consumer laser cutter and in a range of materials. (2) sharing models in 3D. To allow building on the work of others, we build a 3D modeling environment for laser cutting (kyub). After users design a model, they export their 3D models to 2D cutting plans optimized for the machine and material at hand. We extend this volumetric environment with tools to edit individual plates, allowing users to leverage the efficiency of volumetric editing while having control over the most detailed elements in laser-cutting (plates) (3) converting legacy 2D cutting plans to 3D models. To handle legacy models, we build software to interactively reconstruct 3D models from 2D cutting plans. This allows users to reuse the models in more productive ways. We revisit this by automating the assembly process for a large subset of models. The above-mentioned software composes a larger system (kyub, 140,000 lines of code). This system integration enables the push towards actual use, which we demonstrate through a range of workshops where users build complex models such as fully functional guitars. By simplifying sharing and re-use and the resulting increase in model complexity, this line of work forms a small step to enable personal fabrication to scale past the maker phenomenon, towards a mainstream phenomenon—the same way that other fields, such as print (postscript) and ultimately computing itself (portable programming languages, etc.) reached mass adoption.}, language = {en} } @misc{RoumenShigeyamaRudolphetal.2019, author = {Roumen, Thijs and Shigeyama, Jotaro and Rudolph, Julius Cosmo Romeo and Grzelka, Felix and Baudisch, Patrick}, title = {SpringFit}, series = {User Interface Software and Technology}, journal = {User Interface Software and Technology}, publisher = {Association for Computing Machinery}, address = {New York}, isbn = {978-1-4503-6816-2}, doi = {10.1145/3332165.3347930}, pages = {727 -- 738}, year = {2019}, abstract = {Joints are crucial to laser cutting as they allow making three-dimensional objects; mounts are crucial because they allow embedding technical components, such as motors. Unfortunately, mounts and joints tend to fail when trying to fabricate a model on a different laser cutter or from a different material. The reason for this lies in the way mounts and joints hold objects in place, which is by forcing them into slightly smaller openings. Such "press fit" mechanisms unfortunately are susceptible to the small changes in diameter that occur when switching to a machine that removes more or less material ("kerf"), as well as to changes in stiffness, as they occur when switching to a different material. We present a software tool called springFit that resolves this problem by replacing the problematic press fit-based mounts and joints with what we call cantilever-based mounts and joints. A cantilever spring is simply a long thin piece of material that pushes against the object to be held. Unlike press fits, cantilever springs are robust against variations in kerf and material; they can even handle very high variations, simply by using longer springs. SpringFit converts models in the form of 2D cutting plans by replacing all contained mounts, notch joints, finger joints, and t-joints. In our technical evaluation, we used springFit to convert 14 models downloaded from the web.}, language = {en} } @misc{RounsevellMetzgerWalz2019, author = {Rounsevell, Mark D. A. and Metzger, Marc J. and Walz, Ariane}, title = {Operationalising ecosystem services in Europe}, series = {Regional environmental change}, volume = {19}, journal = {Regional environmental change}, number = {8}, publisher = {Springer}, address = {Heidelberg}, issn = {1436-3798}, doi = {10.1007/s10113-019-01560-1}, pages = {2143 -- 2149}, year = {2019}, language = {en} } @article{Rous2021, author = {Rous, Anne-Simone}, title = {Keep undercover! Milit{\"a}rische Spionagepraktiken und ihr Platz in der Gesellschaft (18. - 19. Jh.)}, series = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert}, volume = {22}, journal = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit = Themenheft: Milit{\"a}risches Wissen vom 16. bis zum 19. Jahrhundert}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-495-1}, issn = {1617-9722}, doi = {10.25932/publishup-51537}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-515378}, pages = {209 -- 231}, year = {2021}, language = {de} } @article{Roussanova2013, author = {Roussanova, Elena}, title = {Hermann Trautschold und die Ehrung Alexander von Humboldts in Russland}, series = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies}, volume = {XIV}, journal = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies}, number = {27}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1617-5239}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70083}, pages = {36 -- 54}, year = {2013}, abstract = {Der 100. Geburtstag von Alexander von Humboldt im Jahre 1869 wurde in Russland groß gefeiert, besonders von der Soci{\´e}t{\´e} Imp{\´e}riale des Naturalistes de Moscou. Der sp{\"a}tere Sekret{\"a}r dieser Gesellschaft, Hermann Trautschold, hielt damals eine vielbeachtete Lobrede auf den weltbekannten deutschen Naturforscher und Forschungsreisenden. Im Fokus des Aufsatzes steht der deutsch-russische Geologe und Pal{\"a}ontologe Trautschold sowie seine im Jahre 1869 in Moskau gehaltene Lobrede.}, language = {de} } @article{Roussanova2011, author = {Roussanova, Elena}, title = {Russland ist seit jeher das gelobte Land f{\"u}r Magnetismus gewesen}, series = {Alexander von Humboldt im Netz ; international review for Humboldtian studies}, volume = {xii}, journal = {Alexander von Humboldt im Netz ; international review for Humboldtian studies}, number = {22}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2568-3543}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57525}, pages = {56 -- 83}, year = {2011}, abstract = {Wegen seiner riesigen Ausdehnung hat Russland bei der wissenschaftlichen Erforschung des Erdmagnetismus bereits im 18. Jahrhundert und erst recht im 19. Jahrhundert eine herausragende Rolle gespielt. Alexander von Humboldts Engagement auf dem Gebiet des Erdmagnetismus, sein organisatorisches und diplomatisches Geschick verhalfen dazu, dass man sich international und vielerorts dem Ph{\"a}nomen des Erdmagnetismus zuwandte. Carl Friedrich Gauß stellte dessen Erforschung in der relativ kurzen Zeit zwischen 1833 und 1839 auf ein ganz neues wissenschaftliches Fundament. Die Pl{\"a}ne Humboldts, die Erde m{\"o}glichst global physikalisch zu erforschen, und die Pl{\"a}ne von Gauß, die erdmagnetischen Forschungen zentral zu koordinieren, gipfelten 1849 in der Gr{\"u}ndung des Physikalischen Hauptobservatoriums in St. Petersburg, das zu jener Zeit eine absolut neuartige Institution darstellte - es war der Erforschung der neuen Disziplin Geophysik gewidmet. An der Spitze dieser Institution stand der russische Physiker Adolph Theodor Kupffer, Mitarbeiter und Kollege sowohl von Humboldt als auch von Gauß.}, language = {de} } @article{RousseauErardBecketal.2018, author = {Rousseau, Batiste and Erard, St{\´e}phane and Beck, P. and Quirico, Eric and Schmitt, B. and Brissaud, O. and Montes-Hernandez, G. and Capaccioni, F. and Filacchione, Gianrico and Bockelee-Morvan, Dominique and Leyrat, C. and Ciarniello, M. and Raponi, Andrea and Kappel, David and Arnold, G. and Moroz, L. V. and Palomba, Ernesto and Tosi, Federico}, title = {Laboratory simulations of the Vis-NIR spectra of comet 67P using sub-mu m sized cosmochemical analogues}, series = {Icarus : international journal of solar system studies}, volume = {306}, journal = {Icarus : international journal of solar system studies}, publisher = {Elsevier}, address = {San Diego}, organization = {VIRTIS Team}, issn = {0019-1035}, doi = {10.1016/j.icarus.2017.10.015}, pages = {306 -- 318}, year = {2018}, abstract = {Laboratory spectral measurements of relevant analogue materials were performed in the framework of the Rosetta mission in order to explain the surface spectral properties of comet 67P. Fine powders of coal, iron sulphides, silicates and their mixtures were prepared and their spectra measured in the Vis-IR range. These spectra are compared to a reference spectrum of 67P nucleus obtained with the VIRTIS/Rosetta instrument up to 2.7 mu m, excluding the organics band centred at 3.2 mu m. The species used are known to be chemical analogues for cometary materials which could be present at the surface of 67P. Grain sizes of the powders range from tens of nanometres to hundreds of micrometres. Some of the mixtures studied here actually reach the very low reflectance level observed by VIRTIS on 67P. The best match is provided by a mixture of sub-micron coal, pyrrhotite, and silicates. Grain sizes are in agreement with the sizes of the dust particles detected by the GIADA, MIDAS and COSIMA instruments on board Rosetta. The coal used in the experiment is responsible for the spectral slope in the visible and infrared ranges. Pyrrhotite, which is strongly absorbing, is responsible for the low albedo observed in the NIR. The darkest components dominate the spectra, especially within intimate mixtures. Depending on sample preparation, pyrrhotite can coat the coal and silicate aggregates. Such coating effects can affect the spectra as much as particle size. In contrast, silicates seem to play a minor role. (c) 2017 Elsevier Inc. All rights reserved.}, language = {en} } @article{RouxMoorkampJonesetal.2011, author = {Roux, E. and Moorkamp, Max and Jones, Alan G. and Bischoff, Monika and Endrun, Brigitte and Lebedev, Sergei and Meier, Thomas}, title = {Joint inversion of long-period magnetotelluric data and surface-wave dispersion curves for anisotropic structure application to data from Central Germany}, series = {Geophysical research letters}, volume = {38}, journal = {Geophysical research letters}, number = {3}, publisher = {American Geophysical Union}, address = {Washington}, issn = {0094-8276}, doi = {10.1029/2010GL046358}, pages = {5}, year = {2011}, abstract = {Geophysical datasets sensitive to different physical parameters can be used to improve resolution of Earth's internal structure. Herein, we jointly invert long-period magnetotelluric (MT) data and surface-wave dispersion curves. Our approach is based on a joint inversion using a genetic algorithm for a one-dimensional (1-D) isotropic structure, which we extend to 1-D anisotropic media. We apply our new anisotropic joint inversion to datasets from Central Germany demonstrating the capacity of our joint inversion algorithm to establish a 1-D anisotropic model that fits MT and seismic datasets simultaneously and providing new information regarding the deep structure in Central Germany. The lithosphere/asthenosphere boundary is found at approx. 84 km depth and two main anisotropic layers with coincident most conductive/seismic fast-axis direction are resolved at lower crustal and asthenospheric depths. We also quantify the amount of seismic and electrical anisotropy in the asthenosphere showing an emerging agreement between the two anisotropic coefficients.}, language = {en} } @article{RoveratoLarreaCasadoetal.2018, author = {Roverato, Matteo and Larrea, Patricia and Casado, Ismael and Mulas, Maurizio and Bejar, Gustavo and Bowman, Luke}, title = {Characterization of the Cubilche debris avalanche deposit, a controversial case from the northern Andes, Ecuador}, series = {Journal of volcanology and geothermal research}, volume = {360}, journal = {Journal of volcanology and geothermal research}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0377-0273}, doi = {10.1016/j.jvolgeores.2018.07.006}, pages = {22 -- 35}, year = {2018}, abstract = {In areas characterized by many volcanoes, identifying the source of a deposit may not be trivial. This becomes much more complicated when looking for the source of a debris avalanche deposit (DAD), the common products of catastrophic volcanic edifice collapses. To overcome this problem, in this work a methodology is proposed based on the integration of texture features and areal distribution of the deposit, comparison between the petrography of the coarser clasts within the DAD and of the proximal products, grain-size analysis, and the volumetric estimations of the deposit and the volume missing from the volcanic edifice. This methodology has been tested to a DAD occurred near the city of Ibarra (Imbabura Province; Northern Ecuador), having a controversial source. Two main volcanic edifice are located in proximity of the DAD, the Cubilche volcano (3826 m.a.s.l.), located immediately south of and east of the colossal dormant Imbabura volcano. The former displays a sharp horseshoe shaped scar towards the north and inside this post-collapse edifice, that we name old Cubilche volcano (OCV), is located the young Cubilche volcano (YCV) that refilled a portion of the collapse scar and partially covered the southern flank of the OCV. Detailed knowledge of Cubilche volcano is critical because of its close proximity and interspersed activity with Imbabura volcano. In fact, Imbabura most recent edifice was built over the northwestern slope of the OCV and partially covered it. Recent studies linked the studied DAD to both Imbabura volcano as a product of its northern sector collapse, as well as neighboring Cubilche volcano. Our data points to Cubilche as the most likely source for this DAD. A perspective view of the shaded relief image of the present day OCV shows that the morphology of the volcano is well-preserved on its southern, eastern, and western flanks. This allows us to reconstruct the morphology of the OCV previous to the collapse through interpolation of elevation and altitude data of preserved flanks. A DEM of the present day topography was used for extrapolating the morphology. Using similar methodology, the post collapse base of the amphitheater was reconstructed by removing the relief of the present day YCV. The reconstructed topography of the OCV shows that it could have been a symmetric cone, reaching a maximum elevation of similar to 4100 m.a.s.l. with a lack volume of similar to 3.5 km(3). Based on this scenario, the deposit originated from the OCV main collapse should have a volume >3-3.5 km(3) in accordance to the volume calculated for the studied DAD. (C) 2018 Elsevier B.V. All rights reserved.}, language = {en} } @article{Rowe2004, author = {Rowe, David}, title = {Diskussionsreihe {\"u}ber Antisemitismus, Islamfeindlichkeit und die Notwendigkeit der F{\"o}rderung des Dialogs zwischen den Kulturen}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {9}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {1}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39839}, pages = {53 -- 57}, year = {2004}, language = {de} } @article{RoweThiele2004, author = {Rowe, David and Thiele, Jan}, title = {Mitgliedstaaten des Europarates}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {9}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {2}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-39785}, pages = {183 -- 190}, year = {2004}, language = {de} } @article{Rowe2011, author = {Rowe, John Carlos}, title = {Disease, culture, and transnationalism in the Americas}, series = {Mobilisierte Kulturen}, journal = {Mobilisierte Kulturen}, number = {1}, issn = {2192-3019}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57345}, pages = {71 -- 87}, year = {2011}, language = {en} } @article{RowleyEngelKulig2020, author = {Rowley, K. Michael and Engel, Tilman and Kulig, Kornelia}, title = {Trunk and hip muscle activity during the Balance-Dexterity task in persons with and without recurrent low back pain}, series = {Journal of electromyography and kinesiology}, volume = {50}, journal = {Journal of electromyography and kinesiology}, publisher = {Elsevier Science}, address = {Amsterdam}, issn = {1050-6411}, doi = {10.1016/j.jelekin.2019.102378}, pages = {7}, year = {2020}, abstract = {Coordination of the trunk and hips is crucial for successful dynamic balance in many activities of daily living. Persons with recurrent low back pain (rLBP), both while symptomatic and during periods of symptom remission, exhibit dysfunctional muscle activation patterns and coordination of these joints. In a novel dynamic balance task where persons in remission from rLBP exhibit dissociated trunk motion, it is unknown how trunk and hip musculature are coordinated. Activation of hip and trunk muscles were acquired from nineteen persons with and without rLBP during the Balance-Dexterity Task, which involves balancing on one limb while compressing an unstable spring with the other. There were no between-group differences in activation amplitude for any muscle groups tested. In back-healthy control participants, hip and trunk muscle activation amplitudes increased proportionally in response to the added instability of the spring (R = 0.837, p < 0.001). Increases in muscle activation amplitudes in the group in remission from rLBP were not proportional (R = 0.113, p = 0.655). Instead, hip muscle activation in this group was associated with task performance, i.e. dexterous control of the spring (R = 0.676, p = 0.002). These findings highlight atypical coordination of hip and trunk musculature potentially related to task demands in persons with rLBP even during remission from pain.}, language = {en} } @article{RoyKallmeyerAdhikarietal.2012, author = {Roy, Hans and Kallmeyer, Jens and Adhikari, Rishi Ram and Pockalny, Robert and Jorgensen, Bo Barker and D'Hondt, Steven}, title = {Aerobic microbial respiration in 86-million-year-old deep-sea red clay}, series = {Science}, volume = {336}, journal = {Science}, number = {6083}, publisher = {American Assoc. for the Advancement of Science}, address = {Washington}, issn = {0036-8075}, doi = {10.1126/science.1219424}, pages = {922 -- 925}, year = {2012}, abstract = {Microbial communities can subsist at depth in marine sediments without fresh supply of organic matter for millions of years. At threshold sedimentation rates of 1 millimeter per 1000 years, the low rates of microbial community metabolism in the North Pacific Gyre allow sediments to remain oxygenated tens of meters below the sea floor. We found that the oxygen respiration rates dropped from 10 micromoles of O-2 liter(-1) year(-1) near the sediment-water interface to 0.001 micromoles of O-2 liter(-1) year(-1) at 30-meter depth within 86 million-year-old sediment. The cell-specific respiration rate decreased with depth but stabilized at around 10(-3) femtomoles of O-2 cell(-1) day(-1) 10 meters below the seafloor. This result indicated that the community size is controlled by the rate of carbon oxidation and thereby by the low available energy flux.}, language = {en} } @article{RoyMukherjeeMondaletal.2022, author = {Roy, Parna and Mukherjee, Arpita and Mondal, Pritha and Bhattacharyya, Biswajit and Narayan, Awadhesh and Pandey, Anshu}, title = {Electronic structure and spectroscopy of I-III-VI2 nanocrystals}, series = {The journal of physical chemistry : C, Nanomaterials and interfaces}, volume = {126}, journal = {The journal of physical chemistry : C, Nanomaterials and interfaces}, number = {17}, publisher = {American Chemical Society}, address = {Washington}, issn = {1932-7447}, doi = {10.1021/acs.jpcc.1c10922}, pages = {7364 -- 7373}, year = {2022}, abstract = {I-III-VI2 semiconductor nanocrystals have been applied to a host of energy conversion devices with great success. Large scale implementation of device concepts based on these materials has, however, been somewhat stymied by the strong role of defects in determining the optoelectronic characteristics of these materials. Here we present a perspective view of the role of electronic structure and defects on the physical properties, particularly the spectroscopy, of this family of materials. Applications of these materials are further discussed in this context.}, language = {en} } @article{RoyPikovskij2012, author = {Roy, S. and Pikovskij, Arkadij}, title = {Spreading of energy in the Ding-Dong model}, series = {Chaos : an interdisciplinary journal of nonlinear science}, volume = {22}, journal = {Chaos : an interdisciplinary journal of nonlinear science}, number = {2}, publisher = {American Institute of Physics}, address = {Melville}, issn = {1054-1500}, doi = {10.1063/1.3695369}, pages = {7}, year = {2012}, abstract = {We study the properties of energy spreading in a lattice of elastically colliding harmonic oscillators (Ding-Dong model). We demonstrate that in the regular lattice the spreading from a localized initial state is mediated by compactons and chaotic breathers. In a disordered lattice, the compactons do not exist, and the spreading eventually stops, resulting in a finite configuration with a few chaotic spots.}, language = {en} } @book{Rozanov1995, author = {Rozanov, Vasilij V.}, title = {Menschen des Mondlichts}, isbn = {3-86137-389-0}, year = {1995}, language = {de} } @misc{RozanskiKremerKoeberleetal.1995, author = {Rozanski, Stanislaw A. and Kremer, Friedrich and K{\"o}berle, Peter and Laschewsky, Andr{\´e}}, title = {Relaxation and charge transport in mixtures of zwitterionic polymers and inorganic salts}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-17438}, year = {1995}, abstract = {Dielectric spectroscopy is employed to analyze the molecular dynamics and the charge transport in mixtures of zwitterionic polymers of the type poly{3 [N(-methacryloyloxyalkyl)] N, [N-dimethylammonio propanesulfonate] with sodium iodide in the frequency range of 10²Hz-10(up)7 Hz and in the temperature range of 110 K-400 K. The amount of inorganic salt added varies from 0-200 mol-\% relative to the number of zwitterionic groups present in the polymer, contributing strongly to the conductivity. One relaxation process is observed whose relaxation rate depends strongly on the length of the aliphatic spacer between the polymethacrylate main chain and the zwitterionic group. Exhibiting an Arrhenius-like temperature depence with activation energy EA = 47 KJ/mol, this relaxation process is assigned to fluctuation of the quaternary ammonium groups in the side chains. At higher temperatures, the dielectric properties and the conductivity are primarily dominated by the mobile inorganic ions: conductivity strongly depends on the salt concentration, showing a pronounced electrode polarization effect. The frequency and salt concentration, dependences of the conductivity can be quantitatively described as hopping of charge carriers being subject to spatially randomly varying energy barriers. For the low-frequency regime and for the critical frequency marking the onset of the conductivity's dispersion, the Barton-Nakajima-Namikawa (BNN) relationship is fulfilled.}, language = {en} } @unpublished{Rozenblum2000, author = {Rozenblum, G.}, title = {On some analytical index formulas related to operator-valued symbols}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-25811}, year = {2000}, abstract = {For several classes of pseudodifferential operators with operator-valued symbol analytic index formulas are found. The common feature is that uasual index formulas are not valid for these operators. Applications are given to pseudodifferential operators on singular manifolds.}, language = {en} } @book{Rozenblum2000, author = {Rozenblum, G.}, title = {On some analytical index formulas related to operator-valued symbols}, series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Arbeitsgruppe Partiell}, journal = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik, Arbeitsgruppe Partiell}, publisher = {Univ.}, address = {Potsdam}, issn = {1437-739X}, pages = {37 S.}, year = {2000}, language = {en} } @article{RozinatVanderAalst2006, author = {Rozinat, A and Van der Aalst, Wil M. P.}, title = {Conformance testing: Measuring the fit and appropriateness of event logs and process models}, year = {2006}, abstract = {Most information systems log events (e.g., transaction logs, audit traits) to audit and monitor the processes they support. At the same time, many of these processes have been explicitly modeled. For example, SAP R/3 logs events in transaction logs and there are EPCs (Event-driven Process Chains) describing the so-called reference models. These reference models describe how the system should be used. The coexistence of event logs and process models raises an interesting question: "Does the event log conform to the process model and vice versa?". This paper demonstrates that there is not a simple answer to this question. To tackle the problem, we distinguish two dimensions of conformance: fitness (the event log may be the result of the process modeled) and appropriateness (the model is a likely candidate from a structural and behavioral point of view). Different metrics have been defined and a Conformance Checker has been implemented within the ProM Framework}, language = {en} } @misc{Rossbach2016, type = {Master Thesis}, author = {Roßbach, Naja Anja}, title = {Die Sprache in {\"U}berschriften und Zwischen{\"u}berschriften deutscher Tageszeitungen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-101011}, school = {Universit{\"a}t Potsdam}, pages = {152}, year = {2016}, abstract = {Der deutsche Zeitungsmarkt ist von einem breiten Angebot {\"u}berregionaler Tageszeitungen gekennzeichnet, denen innerhalb der Bev{\"o}lkerung unterschiedliche politische Ausrichtungen zugeschrieben werden. Als konservatives Blatt gilt die „Frankfurter Allgemeine Zeitung" (F.A.Z.), wohingegen sich die „taz.die tageszeitung" (taz) durch eine linksalternative Orientierung auszeichnet. Ausgehend von diesem Unterschied untersucht die Arbeit die sprachliche Gestaltung der {\"U}berschriften, Unter- und Zwischenzeilen der F.A.Z. und der taz zu den Themen „Alternative f{\"u}r Deutschland" (AfD), „Nationalsozialistischer Untergrund" (NSU) und „Front National" (FN). Die qualitativ-quantitative Korpusuntersuchung fokussiert neben lexikalischen und syntaktischen auch sprachstilistische Faktoren, die eine Stellungnahme zu der Forschungsthese, dass mit der sprachlichen Formulierung der Haupt-, Unter- und Zwischenzeilen die politische Ausrichtung und ideologische Grundhaltung der Zeitungen deutlich wird, erlauben. Die Grundlage f{\"u}r die Analysen bildet ein konstruktivistischer Ansatz, der auf systemtheoretischen Annahmen beruht. Dadurch kann zum einen gezeigt werden, wie sich die Ergebnisse der sprachlichen Analysen mit den unterschiedlichen zugrunde liegenden Wirklichkeitskonstruktionen der Zeitungen verbinden lassen, zum anderen wird deutlich, dass sich die Formulierung der {\"U}berschriften auch auf die individuelle Realit{\"a}tskonstruktion der Rezipienten auswirkt. Die vergleichenden Auswertungen geben unterschiedlich gewichtete Hinweise auf die Einstellung der Kommunikatoren und best{\"a}tigen, dass die jeweiligen Perspektivierungen der Wirklichkeit sowie ideologischen Grundhaltungen der F.A.Z. und der taz bereits in der sprachlichen Gestaltung ihrer Titelkomplexe deutlich werden.}, language = {de} } @misc{Rosshart2007, type = {Master Thesis}, author = {Roßhart, Julia}, title = {Bedrohungsszenario "Gender" : gesellschaftliches Geschlechterwissen und Antifeminismus in der Medienberichterstattung zum Gender Mainstreaming}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18374}, school = {Universit{\"a}t Potsdam}, year = {2007}, abstract = {Gegenstand der Analyse ist die mediale Auseinandersetzung um feministische de/konstruktivistische Theorie und Praxis, die 2006/2007 unter der {\"U}berschrift 'Gender Mainstreaming' stattfand. Dominiert wurde die Mediendebatte von einer Reihe antifeministischer Ver{\"o}ffentlichungen in {\"u}berregionalen (Print- und Online-) Zeitungen und Magazinen; auf ihnen liegt das Hauptaugenmerk meiner Untersuchung. Im Zentrum stehen dabei die Einzelanalysen der Artikel "'Gender Mainstreaming' Politische Geschlechtsumwandlung" (FAZ; Volker Zastrow) und "Der neue Mensch" (Der Spiegel; Ren{\´e} Pfister), die unter Hinzuziehung des Debattenkontextes (ca. 50 Artikel) untersucht werden. Die Analyse verfolgt die zentralen diskursiven Strategien, mit denen feministische de/konstruktivistische Theorie und Praxis sowie die Protagonist_innen derselben delegitimiert werden und fragt nach den impliziten wie expliziten Aussagen, den zugrundeliegenden gesellschaftlichen Wissensvorr{\"a}ten, Deutungsrahmen und Ausschl{\"u}ssen. Theoretisch und methodisch wird eine Perspektive entwickelt, die die Mediendebatte einerseits als Kondensat gesellschaftlicher Wissensvorr{\"a}te und als Spiegel gesellschaftlicher Machtverh{\"a}ltnisse, andererseits als Produzentin von Wissen und Macht analysierbar macht. Die Forschungsfragen und Analyseergebnisse tangieren entsprechend das gesellschaftlich vorhandene Alltags- und wissenschaftliche Wissen {\"u}ber Geschlecht(erverh{\"a}ltnisse) ebenso wie das ‚neue' Wissen, das in der Debatte generiert wird, indem Wissen neu kombiniert, akzentuiert, in neue Kontexte gestellt und den Rezipient_innen zug{\"a}nglich gemacht wird. Mit welchen Bedeutungen wird der Begriff 'Gender' aufgeladen? Nach welchen Kriterien werden feministische Interventionen beurteilt? Welche Subjekte werden abgewertet oder ausgeschlossen (Homosexuelle, Transgender u.a.)? Welches wissenschaftliche und welches Alltagswissen liegt den (antifeministischen/ transphoben/ homophoben) Aussagen zugrunde? Inwiefern haben de/konstruktivistische Geschlechterkonzepte Eingang gefunden in die {\"o}ffentliche Geschlechterdebatte? Und schließlich auch: Welche Strategien verfolgten jene medialen Artikulationen, die positiv auf feministische Theorie und Praxis und/oder Gender Mainstreaming Bezug nahmen? 'Gender Mainstreaming' fungierte im untersuchten antifeministischen Strang der Debatte als Aufh{\"a}nger f{\"u}r einen modernisierten Antifeminismus, der sich gegen s{\"a}mtliche feministische Politiken und Theorien richtete, die (in der Debatte) mit dem Begriff 'Gender' assoziiert wurden. 'Gender' wurde dabei als politisches Stigmawort mit vagem de/konstruktivistischem Gehalt etabliert. Die untersuchten Delegitimierungsstrategien betreffen den Wahrheitsgehalt feministischer Theorie, die Ziele und die Wirkungen feministischer Politik und die Frage nach den Interessen, die mit feministischen Politiken verfolgt werden. Diesen Strategien liegen (unter anderem) Vorannahmen bez{\"u}glich Geschlecht und Geschlechtsidentit{\"a}t, Abwertungen und Ausschl{\"u}sse bestimmter geschlechtlich oder sexuell markierter Subjekte, spezifische Deutungen feministischer Politiken und Theorien und die Dethematisierung von Machtverh{\"a}ltnissen zugrunde.}, language = {de} } @phdthesis{Rossmueller1992, author = {Roßm{\"u}ller, Dagmar}, title = {Das "Sich-Erproben" der Sch{\"u}ler - eine Variante des Aussch{\"o}pfens der individuellen Leistungsm{\"o}glichkeiten im Unterricht}, pages = {186, 49, 20 Bl.}, year = {1992}, language = {de} } @phdthesis{Rossnagl2017, author = {Roßnagl, Susanne}, title = {Zum Zusammenhang von Nutzung von Lerngelegenheiten, sozialer Kooperation, individuellen Determinanten und Kompetenzselbsteinsch{\"a}tzungen von Lehrkr{\"a}ften im Berufseinstieg im Allgemeinen Pflichtschulbereich in Nieder{\"o}sterreich}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-398950}, school = {Universit{\"a}t Potsdam}, pages = {302}, year = {2017}, abstract = {Die vorliegende Studie besch{\"a}ftigt sich mit dem Berufseinstieg von Lehrpersonen und untersucht Zusammenh{\"a}nge zwischen der Nutzung von Lerngelegenheiten, sozialer Kooperation, individuellen Determinanten und Kompetenzselbsteinsch{\"a}tzungen, die erstmalig in dieser Zusammenstellung {\"u}berpr{\"u}ft worden sind. Die Literaturrecherche machte deutlich, dass der Berufseinstieg eine besonders wichtige Phase f{\"u}r die berufliche Sozialisation darstellt. Die Nutzung von Lerngelegenheiten wurde empirisch noch nicht sehr oft untersucht vor allem nicht im Zusammenhang mit individuellen Determinanten und die Kooperation meist nur unter dem Fokus der Bedeutung f{\"u}r die Schule. An der empirischen Untersuchung nahmen 223 berufseinsteigende Lehrkr{\"a}fte aus dem Allgemeinen Pflichtschulbereich in Nieder{\"o}sterreich teil, die verpflichtend in den ersten beiden Dienstjahren Fortbildungen besuchen m{\"u}ssen. Diese Situation ist einzigartig in {\"O}sterreich, da es nur in diesem Bundesland seit 2011 eine verpflichtend zu besuchende Berufseinstiegsphase gibt. Ab 2019 wird es in {\"O}sterreich eine Induktionsphase f{\"u}r alle Lehrkr{\"a}fte geben, die in den Beruf einsteigen. Mit Hilfe von Strukturgleichungsmodellen wurden die Zusammenh{\"a}nge untersucht und es zeigte sich, dass es diese in allen Bereichen gibt. Am Ende konnte ein neues Theoriemodell zur Nutzung von Lerngelegenheiten abgeleitet werden, das sich in Theorien zu professionellen Kompetenzentwicklung und zu Lernen in Aus-, Fortund Weiterbildung einordnen l{\"a}sst.}, language = {de} } @phdthesis{Rubach2018, author = {Rubach, Charlott}, title = {Kooperationsbeziehungen zwischen Eltern und Lehrkr{\"a}ften am Ende der Sekundarstufe I}, year = {2018}, language = {de} } @article{RubachLazarides2019, author = {Rubach, Charlott and Lazarides, Rebecca}, title = {Empirische Arbeit: Bedingungen und Auswirkungen des elterlichen Engagements im h{\"a}uslichen und schulischen Umfeld}, series = {Psychologie in Erziehung und Unterricht : Zeitschrift f{\"u}r Forschung und Praxis}, volume = {66}, journal = {Psychologie in Erziehung und Unterricht : Zeitschrift f{\"u}r Forschung und Praxis}, number = {2}, publisher = {Reinhardt}, address = {M{\"u}nchen}, issn = {0342-183X}, doi = {10.2378/peu2019.art08d}, pages = {81 -- 100}, year = {2019}, abstract = {Ziel der Studie ist die Untersuchung der individuellen und schulbezogenen Bedingungen der elterlichen h{\"a}uslichen Unterst{\"u}tzung schulbezogener Lernprozesse von Sch{\"u}lerinnen und Sch{\"u}lern der Sekundarstufe I. Des Weiteren wurde untersucht, inwieweit diese Unterst{\"u}tzung mit der Ver{\"a}nderung der intrinsischen Motivation und des akademischen Selbstkonzeptes der Lernenden einhergeht. Der Beitrag zum Forschungsstand liegt neben der l{\"a}ngsschnittlichen Untersuchung in der Analyse m{\"o}glicher Moderatoren der Zusammenh{\"a}nge. F{\"u}r die Analysen wurden Fragebogendaten von n=157 Lernenden (MAlter=14.5) sowie deren Eltern genutzt. Als zentrales Ergebnis zeigt sich, dass Eltern ihre Kinder h{\"a}uslich unterst{\"u}tzen, wenn Eltern ihr eigenes Schulengagement als n{\"u}tzlich wahrnehmen. Die Unterst{\"u}tzung im h{\"a}uslichen Umfeld steht in positivem Zusammenhang zur Ver{\"a}nderung der intrinsischen Motivation. Sowohl die von Eltern wahrgenommene Kooperationsbereitschaft der Klassenlehrkraft als auch die Vielfalt des elterlichen Engagements im schulischen Umfeld moderieren den Zusammenhang zwischen h{\"a}uslicher Unterst{\"u}tzung durch Eltern und dem akademischen Selbstkonzept. Limitationen wie die Verzerrung der Elternstichprobe sowie praktische Implikationen werden diskutiert.}, language = {de} } @article{RubachLazarides2021, author = {Rubach, Charlott and Lazarides, Rebecca}, title = {Emotionen in Schule und Unterricht}, series = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, journal = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, publisher = {Budrich}, address = {Opladen}, isbn = {978-3-8474-2427-7}, doi = {10.2307/j.ctv1f70kr0.3}, pages = {8 -- 16}, year = {2021}, abstract = {Ein wichtiges Ziel schulischer Bildung ist es, neben der kognitiven Entwicklung auch die Entwicklung nicht-kognitiver Lernmerkmale wie die Lernfreude von Sch{\"u}lerinnen und Sch{\"u}lern zu f{\"o}rdern (Hagenauer \& Hascher, 2018; Prenzel, 2012; Schiepe-Tiska, L{\"u}dtke, Seidel \& Prenzel, 2016). Damit einher geht die Herausforderung f{\"u}r Lehrkr{\"a}fte und Schulen, Lernprozesse so zu gestalten, dass Sch{\"u}lerinnen und Sch{\"u}ler den Prozess der Wissensaneignung als freudvoll erleben und individuell Neugier und Spaß am Lernen entwickeln k{\"o}nnen. Lern-und Leistungsemotionen von Sch{\"u}lerinnen und Sch{\"u}lern haben eine maßgebliche Bedeutung f{\"u}r erfolgreiche Lernprozesse - sie gelten als leistungsf{\"o}rderlich, beg{\"u}nstigen schulisches Wohlbefinden und bef{\"o}rdern die aktive Teilnahme von Lernenden am Unterricht}, language = {de} } @article{RubachLazarides2021, author = {Rubach, Charlott and Lazarides, Rebecca}, title = {Freude und Angst von Sch{\"u}lerinnen und Sch{\"u}lern}, series = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, journal = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, publisher = {Budrich}, address = {Opladen}, isbn = {978-3-8474-2427-7}, doi = {10.2307/j.ctv1f70kr0.11}, pages = {169 -- 191}, year = {2021}, abstract = {Lern- und Leistungsemotionen sind im Schulkontext sowohl bedeutsam f{\"u}r die Motivation, das Wohlbefinden, die Leistungen als auch f{\"u}r die Anstrengungsbereitschaft sowie bildungs- und berufsrelevante Entscheidungen von Sch{\"u}lerinnen und Sch{\"u}lern (als {\"U}berblick siehe Frenzel, Goetz, \& Pekrun, 2015; Hascher \& Brandenberger, 2018). Studien verdeutlichen, dass schulische Leistungen von Lernenden bei hoher fachspezifischer Angst sinken (Aldrup, Klusmann, \& L{\"u}dtke, 2019; Pekrun, Lichtenfeld, Marsh, Murayama, \& Goetz, 2017). Freude hat hingegen positive Auswirkungen auf das fachbezogene Interesse und Leistungen der Lernenden (Pekrun et al., 2017; Schukajlow \& Rakoczy, 2016). Ausgehend von der großen Bedeutung von Emotionen f{\"u}r den langfristigen Bildungserfolg von Lernenden ist...}, language = {de} } @article{RubachLazarides2021, author = {Rubach, Charlott and Lazarides, Rebecca}, title = {Freude und Angst von Sch{\"u}lerinnen und Sch{\"u}lern}, publisher = {Budrich}, address = {Opladen}, doi = {10.2307/j.ctv1f70kr0.11}, pages = {169 -- 191}, year = {2021}, abstract = {Lern- und Leistungsemotionen sind im Schulkontext sowohl bedeutsam f{\"u}r die Motivation, das Wohlbefinden, die Leistungen als auch f{\"u}r die Anstrengungsbereitschaft sowie bildungs- und berufsrelevante Entscheidungen von Sch{\"u}lerinnen und Sch{\"u}lern (als {\"U}berblick siehe Frenzel, Goetz, \& Pekrun, 2015; Hascher \& Brandenberger, 2018). Studien verdeutlichen, dass schulische Leistungen von Lernenden bei hoher fachspezifischer Angst sinken (Aldrup, Klusmann, \& L{\"u}dtke, 2019; Pekrun, Lichtenfeld, Marsh, Murayama, \& Goetz, 2017). Freude hat hingegen positive Auswirkungen auf das fachbezogene Interesse und Leistungen der Lernenden (Pekrun et al., 2017; Schukajlow \& Rakoczy, 2016). Ausgehend von der großen Bedeutung von Emotionen f{\"u}r den langfristigen Bildungserfolg von Lernenden ist...}, language = {de} } @article{RubachLazarides2021, author = {Rubach, Charlott and Lazarides, Rebecca}, title = {Emotionen in Schule und Unterricht Ausblick f{\"u}r Forschung und Praxis}, series = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, journal = {Emotionen in Schule und Unterricht: Bedingungen und Auswirkungen von Emotionen bei Lehrkr{\"a}ften und Lernenden}, publisher = {Budrich}, address = {Opladen}, isbn = {978-3-8474-2427-7}, doi = {10.2307/j.ctv1f70kr0.16}, pages = {284 -- 291}, year = {2021}, language = {de} } @article{RubachLazaridesLohseBossenz2019, author = {Rubach, Charlott and Lazarides, Rebecca and Lohse-Bossenz, Hendrik}, title = {Engagement der Klassenlehrkr{\"a}fte in der Zusammenarbeit mit Eltern und Motivation Lernender in der Sekundarstufe}, series = {Journal for educational research online}, volume = {11}, journal = {Journal for educational research online}, number = {2}, publisher = {Waxmann}, address = {M{\"u}nster}, issn = {1866-6671}, doi = {0111-pedocs-180034}, pages = {61 -- 85}, year = {2019}, abstract = {Die gelingende Zusammenarbeit von Eltern und Lehrkr{\"a}ften gilt als eine wichtige Voraussetzung f{\"u}r den schulischen Bildungserfolg Lernender und wirkt sich zudem positiv auf die Beziehung von Lehrkr{\"a}ften und Lernenden aus. Der vorliegende Beitrag untersucht, inwiefern das Engagement von Klassenlehrkr{\"a}ften in der Zusammenarbeit mit Eltern, operationalisiert {\"u}ber angebotene formelle und informelle Kontakte, sowie die von Lernenden wahrgenommene Lehrer-Sch{\"u}ler-Beziehung mit der intrinsischen Motivation Lernender in Zusammenhang stehen. Ausgewertet wurden Daten von 881 Sch{\"u}lerinnen und Sch{\"u}lern aus 39 neunten und zehnten Klassen aus 13 Schulen der Sekundarstufe (Gymnasien und Integrierte Sekundarschulen). Manifestlatente Mehrebenenmodelle zeigen signi?' kant positive Zusammenh{\"a}nge zwischen der von Lehrkr{\"a}ften angebotenen Vielfalt formeller Kontakte und der intrinsischen Motivation der Lernenden auf Klassenebene. Auf Individualebene zeigen sich signi?' kante positive Zusammenh{\"a}nge zwischen der von Lernenden berichteten Lehrer-Sch{\"u}ler-Beziehung und der intrinsischen Motivation.}, language = {de} } @article{RubenssonSoderstromBinggelietal.2015, author = {Rubensson, Jan-Erik and Soderstrom, Johan and Binggeli, Christian and Grasjo, Joakim and Andersson, Johan and Sathe, Conny and Hennies, Franz and Bisogni, Valentina and Huang, Yaobo and Olalde, Paul and Schmitt, Thorsten and Strocov, Vladimir N. and F{\"o}hlisch, Alexander and Kennedy, Brian and Pietzsch, Annette}, title = {Rydberg-Resolved Resonant Inelastic Soft X-Ray Scattering: Dynamics at Core Ionization Thresholds}, series = {Physical review letters}, volume = {114}, journal = {Physical review letters}, number = {13}, publisher = {American Physical Society}, address = {College Park}, issn = {0031-9007}, doi = {10.1103/PhysRevLett.114.133001}, pages = {5}, year = {2015}, abstract = {Resonant inelastic x-ray scattering spectra excited in the immediate vicinity of the core-level ionization thresholds of N-2 have been recorded. Final states of well-resolved symmetry-selected Rydberg series converging to valence-level ionization thresholds with vibrational excitations are observed. The results are well described by a quasi-two-step model which assumes that the excited electron is unaffected by the radiative decay. This threshold dynamics simplifies the interpretation of resonant inelastic x-ray scattering spectra considerably and facilitates characterization of low-energy excited final states in molecular systems.}, language = {en} } @misc{RubergRothweilerVerissimoetal.2019, author = {Ruberg, Tobias and Rothweiler, Monika and Ver{\´i}ssimo, Jo{\~a}o Marques and Clahsen, Harald}, title = {Childhood bilingualism and Specific Language Impairment}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {3}, issn = {1866-8364}, doi = {10.25932/publishup-51809}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-518095}, pages = {15}, year = {2019}, abstract = {This study addresses the question of whether and how growing up with more than one language shapes a child's language impairment. Our focus is on Specific Language Impairment (SLI) in bilingual (Turkish-German) children. We specifically investigated a range of phenomena related to the so-called CP (Complementizer Phrase) in German, the hierarchically highest layer of syntactic clause structure, which has been argued to be particularly affected in children with SLI. Spontaneous speech data were examined from bilingual children with SLI in comparison to two comparison groups: (i) typically-developing bilingual children, (ii) monolingual children with SLI. We found that despite persistent difficulty with subject-verb agreement, the two groups of children with SLI did not show any impairment of the CP-domain. We conclude that while subject-verb agreement is a suitable linguistic marker of SLI in German-speaking children, for both monolingual and bilingual ones, 'vulnerability of the CP-domain' is not.}, language = {en} } @article{RubergRothweilerVerissimoetal.2019, author = {Ruberg, Tobias and Rothweiler, Monika and Ver{\´i}ssimo, Jo{\~a}o Marques and Clahsen, Harald}, title = {Childhood bilingualism and Specific Language Impairment}, series = {Bilingualism: Language and Cognition}, volume = {23}, journal = {Bilingualism: Language and Cognition}, number = {3}, publisher = {Cambridge Univ. Press}, address = {Cambridge}, issn = {1366-7289}, doi = {10.1017/S1366728919000580}, pages = {668 -- 680}, year = {2019}, abstract = {This study addresses the question of whether and how growing up with more than one language shapes a child's language impairment. Our focus is on Specific Language Impairment (SLI) in bilingual (Turkish-German) children. We specifically investigated a range of phenomena related to the so-called CP (Complementizer Phrase) in German, the hierarchically highest layer of syntactic clause structure, which has been argued to be particularly affected in children with SLI. Spontaneous speech data were examined from bilingual children with SLI in comparison to two comparison groups: (i) typically-developing bilingual children, (ii) monolingual children with SLI. We found that despite persistent difficulty with subject-verb agreement, the two groups of children with SLI did not show any impairment of the CP-domain. We conclude that while subject-verb agreement is a suitable linguistic marker of SLI in German-speaking children, for both monolingual and bilingual ones, 'vulnerability of the CP-domain' is not.}, language = {en} } @phdthesis{Rubertus2024, author = {Rubertus, Elina}, title = {Coarticulatory changes across childhood}, doi = {10.25932/publishup-63012}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-630123}, school = {Universit{\"a}t Potsdam}, pages = {X, 131}, year = {2024}, abstract = {The present dissertation investigates changes in lingual coarticulation across childhood in German-speaking children from three to nine years of age and adults. Coarticulation refers to the mismatch between the abstract phonological units and their seemingly commingled realization in continuous speech. Being a process at the intersection of phonology and phonetics, addressing its changes across childhood allows for insights in speech motor as well as phonological developments. Because specific predictions for changes in coarticulation across childhood can be derived from existing speech production models, investigating children's coarticulatory patterns can help us model human speech production. While coarticulatory changes may shed light on some of the central questions of speech production development, previous studies on the topic were sparse and presented a puzzling picture of conflicting findings. One of the reasons for this lack is the difficulty in articulatory data acquisition in a young population. Within the research program this dissertation is embedded in, we accepted this challenge and successfully set up the hitherto largest corpus of articulatory data from children using ultrasound tongue imaging. In contrast to earlier studies, a high number of participants in tight age cohorts across a wide age range and a thoroughly controlled set of pseudowords allowed for statistically powerful investigations of a process known as variable and complicated to track. The specific focus of my studies is on lingual vocalic coarticulation as measured in the horizontal position of the highest point of the tongue dorsum. Based on three studies on a) anticipatory coarticulation towards the left, b) carryover coarticulation towards the right side of the utterance, and c) anticipatory coarticulatory extent in repeated versus read aloud speech, I deduct the following main theses: 1. Maturing speech motor control is responsible for some developmental changes in coarticulation. 2. Coarticulation can be modeled as the coproduction of articulatory gestures. 3. The developmental change in coarticulation results from a decrease of vocalic activation width.}, language = {en} } @misc{RubertusNoiray2018, author = {Rubertus, Elina and Noiray, Aude}, title = {On the development of gestural organization}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {478}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-419753}, pages = {21}, year = {2018}, abstract = {In the first years of life, children differ greatly from adults in the temporal organization of their speech gestures in fluent language production. However, dissent remains as to the maturational direction of such organization. The present study sheds new light on this process by tracking the development of anticipatory vowel-to-vowel coarticulation in a cross-sectional investigation of 62 German children (from 3.5 to 7 years of age) and 13 adults. It focuses on gestures of the tongue, a complex organ whose spatiotemporal control is indispensable for speech production. The goal of the study was threefold: 1) investigate whether children as well as adults initiate the articulation for a target vowel in advance of its acoustic onset, 2) test if the identity of the intervocalic consonant matters and finally, 3) describe age-related developments of these lingual coarticulatory patterns. To achieve this goal, ultrasound tongue imaging was used to record lingual movements and quantify changes in coarticulation degree as a function of consonantal context and age. Results from linear mixed effects models indicate that like adults, children initiate vowels' lingual gestures well ahead of their acoustic onset. Second, while the identity of the intervocalic consonant affects the degree of vocalic anticipation in adults, it does not in children at any age. Finally, the degree of vowelto-vowel coarticulation is significantly higher in all cohorts of children than in adults. However, among children, a developmental decrease of vocalic coarticulation is only found for sequences including the alveolar stop /d/ which requires finer spatiotemporal coordination of the tongue's subparts compared to labial and velar stops. Altogether, results suggest greater gestural overlap in child than in adult speech and support the view of a non-uniform and protracted maturation of lingual coarticulation calling for thorough considerations of the articulatory intricacies from which subtle developmental differences may originate.}, language = {en} } @article{RubertusNoiray2018, author = {Rubertus, Elina and Noiray, Aude}, title = {On the development of gestural organization}, series = {PLoS ONE}, volume = {13}, journal = {PLoS ONE}, number = {9}, publisher = {Public Library of Science}, address = {San Francisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0203562}, pages = {1 -- 21}, year = {2018}, abstract = {In the first years of life, children differ greatly from adults in the temporal organization of their speech gestures in fluent language production. However, dissent remains as to the maturational direction of such organization. The present study sheds new light on this process by tracking the development of anticipatory vowel-to-vowel coarticulation in a cross-sectional investigation of 62 German children (from 3.5 to 7 years of age) and 13 adults. It focuses on gestures of the tongue, a complex organ whose spatiotemporal control is indispensable for speech production. The goal of the study was threefold: 1) investigate whether children as well as adults initiate the articulation for a target vowel in advance of its acoustic onset, 2) test if the identity of the intervocalic consonant matters and finally, 3) describe age-related developments of these lingual coarticulatory patterns. To achieve this goal, ultrasound tongue imaging was used to record lingual movements and quantify changes in coarticulation degree as a function of consonantal context and age. Results from linear mixed effects models indicate that like adults, children initiate vowels' lingual gestures well ahead of their acoustic onset. Second, while the identity of the intervocalic consonant affects the degree of vocalic anticipation in adults, it does not in children at any age. Finally, the degree of vowelto-vowel coarticulation is significantly higher in all cohorts of children than in adults. However, among children, a developmental decrease of vocalic coarticulation is only found for sequences including the alveolar stop /d/ which requires finer spatiotemporal coordination of the tongue's subparts compared to labial and velar stops. Altogether, results suggest greater gestural overlap in child than in adult speech and support the view of a non-uniform and protracted maturation of lingual coarticulation calling for thorough considerations of the articulatory intricacies from which subtle developmental differences may originate.}, language = {en} } @article{RubertusNoiray2020, author = {Rubertus, Elina and Noiray, Aude}, title = {Vocalic activation width decreases across childhood}, series = {Laboratory Phonology}, volume = {11}, journal = {Laboratory Phonology}, number = {1}, publisher = {de Gruyter Mouton}, address = {Berlin, New York}, issn = {1868-6346}, doi = {10.5334/labphon.228}, pages = {27}, year = {2020}, abstract = {This study is the first to use kinematic data to assess lingual carryover coarticulation in children. We investigated whether the developmental decrease previously attested in anticipatory coarticulation, as well as the relation between coarticulatory degree and the consonantal context, also characterize carryover coarticulation. Sixty-two children and 13 adults, all native speakers of German, were recruited according to five age cohorts: three-year-olds, four-year-olds, five-year-olds, seven-year-olds, and adults. Tongue movements during the production of ə.CV.Cə utterances (C = /b, d, g/, V = /i, y, e, a, o, u/) were recorded with ultrasound. We measured vowel-induced horizontal displacement of the tongue dorsum within the last syllable and compared the resulting coarticulatory patterns between age cohorts and consonantal contexts. Results indicate that the degree of vocalic carryover coarticulation decreases with age. Vocalic prominence within an utterance as well as its change across childhood depended on the postvocalic consonant's articulatory demands for the tongue dorsum (i.e., its coarticulatory resistance): Low resistant /b/ and /g/ allowed for more vocalic perseveration and a continuous decrease, while the highly resistant /d/ displayed lower coarticulation degrees and discontinuous effects. These findings parallel those in anticipation suggesting a similar organization of anticipatory and carryover coarticulation. Implications for theories of speech production are discussed.}, language = {en} } @misc{RubertusNoiray2020, author = {Rubertus, Elina and Noiray, Aude}, title = {Vocalic activation width decreases across childhood}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {645}, issn = {1866-8364}, doi = {10.25932/publishup-47353}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-473536}, pages = {29}, year = {2020}, abstract = {This study is the first to use kinematic data to assess lingual carryover coarticulation in children. We investigated whether the developmental decrease previously attested in anticipatory coarticulation, as well as the relation between coarticulatory degree and the consonantal context, also characterize carryover coarticulation. Sixty-two children and 13 adults, all native speakers of German, were recruited according to five age cohorts: three-year-olds, four-year-olds, five-year-olds, seven-year-olds, and adults. Tongue movements during the production of ə.CV.Cə utterances (C = /b, d, g/, V = /i, y, e, a, o, u/) were recorded with ultrasound. We measured vowel-induced horizontal displacement of the tongue dorsum within the last syllable and compared the resulting coarticulatory patterns between age cohorts and consonantal contexts. Results indicate that the degree of vocalic carryover coarticulation decreases with age. Vocalic prominence within an utterance as well as its change across childhood depended on the postvocalic consonant's articulatory demands for the tongue dorsum (i.e., its coarticulatory resistance): Low resistant /b/ and /g/ allowed for more vocalic perseveration and a continuous decrease, while the highly resistant /d/ displayed lower coarticulation degrees and discontinuous effects. These findings parallel those in anticipation suggesting a similar organization of anticipatory and carryover coarticulation. Implications for theories of speech production are discussed.}, language = {en} } @article{RubeyBruneHeineetal.2017, author = {Rubey, Michael and Brune, Sascha and Heine, Christian and Davies, D. Rhodri and Williams, Simon E. and M{\"u}ller, R. Dietmar}, title = {role of subducted slabs}, series = {Solid earth}, volume = {8}, journal = {Solid earth}, publisher = {Copernicus}, address = {G{\"o}ttingen}, issn = {1869-9510}, doi = {10.5194/se-8-899-2017}, pages = {899 -- 919}, year = {2017}, language = {en} }