@misc{DvornikovLeibmanHeimetal.2018, author = {Dvornikov, Yury and Leibman, Marina and Heim, Birgit and Bartsch, Annett and Herzschuh, Ulrike and Skorospekhova, Tatiana and Fedorova, Irina and Khomutov, Artem and Widhalm, Barbara and Gubarkov, Anatoly and R{\"o}ßler, Sebastian}, title = {Terrestrial CDOM in lakes of Yamal Peninsula}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1333}, issn = {1866-8372}, doi = {10.25932/publishup-45972}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-459720}, pages = {21}, year = {2018}, abstract = {In this study, we analyze interactions in lake and lake catchment systems of a continuous permafrost area. We assessed colored dissolved organic matter (CDOM) absorption at 440 nm (a(440)(CDOM)) and absorption slope (S300-500) in lakes using field sampling and optical remote sensing data for an area of 350 km(2) in Central Yamal, Siberia. Applying a CDOM algorithm (ratio of green and red band reflectance) for two high spatial resolution multispectral GeoEye-1 and Worldview-2 satellite images, we were able to extrapolate the a()(CDOM) data from 18 lakes sampled in the field to 356 lakes in the study area (model R-2 = 0.79). Values of a(440)(CDOM) in 356 lakes varied from 0.48 to 8.35 m(-1) with a median of 1.43 m(-1). This a()(CDOM) dataset was used to relate lake CDOM to 17 lake and lake catchment parameters derived from optical and radar remote sensing data and from digital elevation model analysis in order to establish the parameters controlling CDOM in lakes on the Yamal Peninsula. Regression tree model and boosted regression tree analysis showed that the activity of cryogenic processes (thermocirques) in the lake shores and lake water level were the two most important controls, explaining 48.4\% and 28.4\% of lake CDOM, respectively (R-2 = 0.61). Activation of thermocirques led to a large input of terrestrial organic matter and sediments from catchments and thawed permafrost to lakes (n = 15, mean a(440)(CDOM) = 5.3 m(-1)). Large lakes on the floodplain with a connection to Mordy-Yakha River received more CDOM (n = 7, mean a(440)(CDOM) = 3.8 m(-1)) compared to lakes located on higher terraces.}, language = {en} } @misc{LohwasserBraunMusiletal.2018, author = {Lohwaßer, Roswitha and Braun, Claudia and Musil, Andreas and Kludt, Steffen and Schroeder, Christoph and Jostes, Brigitte and Kortenkamp, Ulrich and Goetz, Ilka and R{\"u}diger, Marie and Hackel, Manuela and Brzezinski, Jan and Polziehn, Tabea and Faulian, Ariane and Goral, Johanna and Wendland, Mirko and Zurek, Peter Paul and Nyagolova, Maya}, title = {Kentron : Journal zur Lehrerbildung = Durchstarten}, number = {32}, publisher = {Universit{\"a}t Potsdam, Zentrum f{\"u}r Lehrerbildung}, address = {Potsdam}, issn = {1867-4720}, doi = {10.25932/publishup-59039}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-590394}, pages = {43}, year = {2018}, language = {de} } @misc{Kolls2018, type = {Master Thesis}, author = {Kolls, Ronja Clara}, title = {Intertextualit{\"a}t in deutschen Rap-Texten und ihr didaktischer Nutzen f{\"u}r den Deutschunterricht}, doi = {10.25932/publishup-53417}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-534171}, school = {Universit{\"a}t Potsdam}, pages = {68}, year = {2018}, abstract = {Der Fokus der Arbeit liegt auf Texten des Genres Deutschrap. Untersucht werden diese Prim{\"a}rquellen in Hinblick auf Formen und Funktionen von Intertextualit{\"a}t und wie diese f{\"u}r die Vermittlung von Unterrichtsinhalten im Deutschunterricht eingesetzt werden k{\"o}nnen. Zu diesem Zweck ist die Arbeit in einen literaturtheoretischen Teil und einen didaktischen Teil gegliedert. Zun{\"a}chst erfolgt ein {\"U}berblick zum Begriff der Intertextualit{\"a}t und der verwendeten Terminologie. Danach wird erkl{\"a}rt, inwiefern Rap sich als literarische Gattung begreifen l{\"a}sst, bevor die spezielle Beschaffenheit und der Stellenwert intertextueller Referenzen in deutschen Rap-Texten untersucht werden. Im Anschluss werden intertextuelle Ph{\"a}nomene in Rap-Texten kategorisiert, erl{\"a}utert und anhand exemplarischer Rap-Zeilen belegt. Im didaktischen Teil der Arbeit m{\"u}nden die Ergebnisse schließlich im Entwurf einer Unterrichtssequenz zu dem Thema Intertextualit{\"a}t.}, language = {de} } @misc{OlmerEngelsUsmanetal.2018, author = {Olmer, Ruth and Engels, Lena and Usman, Abdulai and Menke, Sandra and Malik, Muhammad Nasir Hayat and Pessler, Frank and G{\"o}hring, Gudrun and Bornhorst, Dorothee and Bolten, Svenja and Abdelilah-Seyfried, Salim and Scheper, Thomas and Kempf, Henning and Zweigerdt, Robert and Martin, Ulrich}, title = {Differentiation of Human Pluripotent Stem Cells into Functional Endothelial Cells in Scalable Suspension Culture}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {5}, issn = {1866-8372}, doi = {10.25932/publishup-42709}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-427095}, pages = {18}, year = {2018}, abstract = {Endothelial cells (ECs) are involved in a variety of cellular responses. As multifunctional components of vascular structures, endothelial (progenitor) cells have been utilized in cellular therapies and are required as an important cellular component of engineered tissue constructs and in vitro disease models. Although primary ECs from different sources are readily isolated and expanded, cell quantity and quality in terms of functionality and karyotype stability is limited. ECs derived from human induced pluripotent stem cells (hiPSCs) represent an alternative and potentially superior cell source, but traditional culture approaches and 2D differentiation protocols hardly allow for production of large cell numbers. Aiming at the production of ECs, we have developed a robust approach for efficient endothelial differentiation of hiPSCs in scalable suspension culture. The established protocol results in relevant numbers of ECs for regenerative approaches and industrial applications that show in vitro proliferation capacity and a high degree of chromosomal stability.}, language = {en} } @misc{Galetzka2018, type = {Master Thesis}, author = {Galetzka, Cedric}, title = {Reward and prediction errors in Bayesian sensorimotor control}, doi = {10.25932/publishup-50350}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-503507}, school = {Universit{\"a}t Potsdam}, pages = {53}, year = {2018}, abstract = {Midbrain dopamine neurons invigorate responses by signaling opportunity costs (tonic dopamine) and promote associative learning by encoding a reward prediction error signal (phasic dopamine). Recent studies on Bayesian sensorimotor control have implicated midbrain dopamine concentration in the integration of prior knowledge and current sensory information. The present behavioral study addressed the contributions of tonic and phasic dopamine in a Bayesian decision-making task by alternating reward magnitude and inferring reward prediction errors. Twenty-four participants were asked to indicate the position of a hidden target stimulus under varying prior and likelihood uncertainty. Trial-by-trial rewards were allocated based on performance and two different reward maxima. Overall, participants' behavior agreed with Bayesian decision theory, but indicated excessive reliance on likelihood information. These results thus oppose accounts of statistically optimal integration in sensorimotor control, and suggest that the sensorimotor system is subject to additional decision heuristics. Moreover, higher reward magnitude was not observed to induce enhanced response vigor, and was associated with less Bayes-like integration. In addition, the weighting of prior knowledge and current sensory information proceeded independently of reward prediction errors. Taken together, these findings suggest that the process of combining prior and likelihood uncertainties in sensorimotor control is largely robust to variations in reward.}, language = {en} } @misc{Roschinsky2018, type = {Master Thesis}, author = {Roschinsky, Diane}, title = {Thomas Morus: Utopia}, series = {Copia - Potsdamer Anregungen f{\"u}r den Lateinunterricht}, volume = {2021}, journal = {Copia - Potsdamer Anregungen f{\"u}r den Lateinunterricht}, number = {1}, editor = {Forst, Alexandra}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2748-6621}, doi = {10.25932/publishup-50468}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-504686}, school = {Universit{\"a}t Potsdam}, pages = {160}, year = {2018}, abstract = {In Thomas Morus' Utopia wird intensiv {\"u}ber die in einem idealen Staat herrschenden Verh{\"a}ltnisse nachgedacht. F{\"u}r den Lateinunterricht empfiehlt sich dieses neulateinische Werk, weil Sch{\"u}ler durch seine Lekt{\"u}re zum einen erkennen, dass die lateinische Sprache nach dem Untergang des r{\"o}mischen Reiches fortlebte, und weil sie zum anderen zu allgemeinen Reflexionen {\"u}ber vorbildhafte Gesellschaftsordnungen angeregt und f{\"u}r die dabei zu ber{\"u}cksichtigenden Aspekte sensibilisiert werden. So entsteht in ihnen ein Bewusstsein f{\"u}r die Grundfesten eines harmonischen Zusammenlebens. Das vorliegende Lekt{\"u}reheft bietet umfangreiches, didaktisch aufbereitetes Material, das Lateinsch{\"u}lern echtes Lesevergn{\"u}gen bereitet und das Lehrkr{\"a}fte ohne großen Aufwand im Unterricht einsetzen k{\"o}nnen. Diese Publikation schließt damit eine f{\"u}r die Utopia bislang bestehende L{\"u}cke und l{\"a}sst hoffen, dass das Werk k{\"u}nftig einen festen Platz im Lateinunterricht erh{\"a}lt.}, language = {de} } @inproceedings{Petsche2018, author = {Petsche, Hans-Joachim}, title = {In honour of Seymour Papert}, doi = {10.25932/publishup-49730}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-497302}, pages = {17}, year = {2018}, abstract = {Forth is nice and flexible but to a philosopher and teacher educator Logo is the more impressing language. Both are relatives of Lisp, but Forth has a reverse Polish notation where as Logo has an infix notation. Logo allows top down programming, Forth only bottom up. Logo enables recursive programming, Forth does not. Logo includes turtle graphics, Forth has nothing comparable. So what to do if you can't get Logo and have no information about its inner architecture? This should be a case of "empirical modelling": How can you model observable results of the behaviour of Logo in terms of Forth? The main steps to solve this problem are shown in the first part of the paper. The second part of the paper discusses the problem of modelling and shows that the modelling of making and the modelling of recognition have the same mathematical structure. So "empirical modelling" can also serve for modelling desired behaviour of technical systems. The last part of the paper will show that the heuristic potential of a problem which should be modeled is more important than the programming language. The Picasso construal shows, in a very simple way, how children of different ages can model emotional relations in human behaviour with a simple Logo system.}, language = {en} } @misc{Massue2018, type = {Master Thesis}, author = {Massu{\´e}, Cyriac}, title = {Valoriser les synergies franco-allemandes dans l'innovation au service de la transition {\´e}nerg{\´e}tique. Les le{\c{c}}ons du Programme Inter Carnot Fraunhofer (PICF)}, series = {MEGA-Schriftenreihe}, journal = {MEGA-Schriftenreihe}, number = {4}, editor = {Proeller, Isabella and Silvia von, Steinsdorff and Sommermann, Karl-Peter and Capitant, David and Larat, Fabrice}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2701-391X}, doi = {10.25932/publishup-49189}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-491892}, school = {Universit{\"a}t Potsdam}, pages = {XXI, 112}, year = {2018}, abstract = {Face {\`a} l'urgence environnementale, l'innovation dans le domaine des nouvelles technologies de l'{\´e}nergie (NTE) constitue un d{\´e}fi primordial. Les NTE constituent un march{\´e} concurrentiel en plein expansion, o{\`u} s'affrontent d{\`e}s {\`a} pr{\´e}sent les acteurs de l'innovation internationale. La R\&D {\´e}nerg{\´e}tique repr{\´e}sente donc pour l'Europe un d{\´e}fi multiple : Il s'agit de d{\´e}velopper les technologies qui nous permettrons de r{\´e}duire nos {\´e}missions de gaz {\`a} effet de serre et nos d{\´e}pendances {\´e}nerg{\´e}tiques. L'innovation produite devra {\´e}galement garantir la place de l'industrie europ{\´e}enne {\`a} la pointe du march{\´e} des NTE dans un contexte hautement comp{\´e}titif. La collaboration franco-allemande en mati{\`e}re de R\&D {\´e}nerg{\´e}tique rec{\`e}le ici un potentiel d'innovation disruptive particuli{\`e}rement important, gr{\^a}ce {\`a} des paysages de R\&D fortement compl{\´e}mentaires. Les programmes bilat{\´e}raux constituent un outil prometteur pour la valorisation des synergies inexploit{\´e}es. En permettant la mise en place de partenariats franco-allemands restreints, autour de th{\´e}matiques pr{\´e}cises, ils constituent en effet un outil compl{\´e}mentaire aux programmes europ{\´e}ens. Le Programme Inter Carnot-Fraunhofer (PICF) constitue un exemple abouti de programme bilat{\´e}ral ayant permis la concr{\´e}tisation de collaborations mutuellement b{\´e}n{\´e}fiques dans le domaine des NTE, gr{\^a}ce {\`a} la mise au point d'une proc{\´e}dure harmonis{\´e}e. N{\´e}anmoins, l'analyse du PICF montre {\´e}galement que les programmes bilat{\´e}raux franco-allemands devront pr{\´e}voir la possibilit{\´e} de financements-relai afin de p{\´e}renniser les {\´e}changes. Dans le contexte particulier des NTE, une extension aux projets de d{\´e}monstration ainsi qu'un ciblage des sujets porteurs sur la base d'un comit{\´e} consultatif scientifique ind{\´e}pendant paraissent indispensables. Ces efforts franco-allemands pourront servir de mod{\`e}le {\`a} l'innovation de rupture bas{\´e}e sur la valorisation des synergies intra-europ{\´e}ennes.}, language = {fr} } @misc{Steiglechner2018, type = {Master Thesis}, author = {Steiglechner, Peter}, title = {Estimating global warming from anthropogenic heat emissions}, doi = {10.25932/publishup-49886}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-498866}, school = {Universit{\"a}t Potsdam}, year = {2018}, abstract = {The forcing from the anthropogenic heat flux (AHF), i.e. the dissipation of primary energy consumed by the human civilisation, produces a direct climate warming. Today, the globally averaged AHF is negligibly small compared to the indirect forcing from greenhouse gas emissions. Locally or regionally, though, it has a significant impact. Historical observations show a constant exponential growth of worldwide energy production. A continuation of this trend might be fueled or even amplified by the exploration of new carbon-free energy sources like fusion power. In such a scenario, the impacts of the AHF become a relevant factor for anthropogenic post-greenhouse gas climate change on the global scale, as well. This master thesis aims at estimating the climate impacts of such a growing AHF forcing. In the first part of this work, the AHF is built into simple and conceptual, zero- and one-dimensional Energy Balance Models (EBMs), providing quick order of magnitude estimations of the temperature impact. In the one-dimensional EBM, the ice-albedo feedback from enhanced ice melting due to the AHF increases the temperature impact significantly compared to the zero-dimensional EBM. Additionally, the forcing is built into a climate model of intermediate complexity, CLIMBER-3α. This allows for the investigation of the effect of localised AHF and gives further insights into the impact of the AHF on processes like the ocean heat uptake, sea ice and snow pattern changes and the ocean circulation. The global mean temperature response from the AHF today is of the order of 0.010 - 0.016 K in all reasonable model configurations tested. A transient tenfold increase of this forcing heats up the Earth System additionally by roughly 0.1 - 0.2 K in the presented models. Further growth can also affect the tipping probability of certain climate elements. Most renewable energy sources do not or only partially contribute to the AHF forcing as the energy from these sources dissipates anyway. Hence, the transition to a (carbon-free) renewable energy mix, which, in particular, does not rely on nuclear power, eliminates the local and global climate impacts from the increasing AHF forcing, independent of the growth of energy production.}, language = {en} } @misc{PaulyHelleMiramontetal.2018, author = {Pauly, Maren and Helle, Gerhard and Miramont, C{\´e}cile and B{\"u}ntgen, Ulf and Treydte, Kerstin and Reinig, Frederick and Guibal, Fr{\´e}d{\´e}ric and Sivan, Olivier and Heinrich, Ingo and Riedel, Frank and Kromer, Bernd and Balanzategui, Daniel and Wacker, Lukas and Sookdeo, Adam Sookdeo and Brauer, Achim}, title = {Subfossil trees suggest enhanced Mediterranean hydroclimate variability at the onset of the Younger Dryas}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, number = {1135}, issn = {1866-8372}, doi = {10.25932/publishup-45916}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-459169}, pages = {10}, year = {2018}, abstract = {Nearly 13,000 years ago, the warming trend into the Holocene was sharply interrupted by a reversal to near glacial conditions. Climatic causes and ecological consequences of the Younger Dryas (YD) have been extensively studied, however proxy archives from the Mediterranean basin capturing this period are scarce and do not provide annual resolution. Here, we report a hydroclimatic reconstruction from stable isotopes (delta O-18, delta C-13) in subfossil pines from southern France. Growing before and during the transition period into the YD (12 900-12 600 cal BP), the trees provide an annually resolved, continuous sequence of atmospheric change. Isotopic signature of tree sourcewater (delta O-18(sw)) and estimates of relative air humidity were reconstructed as a proxy for variations in air mass origin and precipitation regime. We find a distinct increase in inter-annual variability of sourcewater isotopes (delta O-18(sw)), with three major downturn phases of increasing magnitude beginning at 12 740 cal BP. The observed variation most likely results from an amplified intensity of North Atlantic (low delta O-18(sw)) versus Mediterranean (high delta O-18(sw)) precipitation. This marked pattern of climate variability is not seen in records from higher latitudes and is likely a consequence of atmospheric circulation oscillations at the margin of the southward moving polar front.}, language = {en} }