@unpublished{FlandoliHoegele2014,
  author    = {Flandoli, Franco and H{\"o}gele, Michael},
  title     = {A solution selection problem with small stable perturbations},
  volume    = {3},
  number    = {8},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2193-6943},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-71205},
  pages     = {43},
  year      = {2014},
  abstract  = {The zero-noise limit of differential equations with singular coefficients is investigated for the first time in the case when the noise is a general alpha-stable process. It is proved that extremal solutions are selected and the probability of selection is computed. Detailed analysis of the characteristic function of an exit time form on the half-line is performed, with a suitable decomposition in small and large jumps adapted to the singular drift.},
  language  = {en}
}
@unpublished{FladSchneiderSchulze2007,
  author    = {Flad, Heinz-J{\"u}rgen and Schneider, Reinhold and Schulze, Bert-Wolfgang},
  title     = {Asymptotic regularity of solutions of Hartree-Fock equations with coulomb potential},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-30268},
  year      = {2007},
  abstract  = {We study the asymptotic regularity of solutions of Hartree-Fock equations for Coulomb systems. In order to deal with singular Coulomb potentials, Fock operators are discussed within the calculus of pseudo-differential operators on conical manifolds. First, the non-self-consistent-field case is considered which means that the functions that enter into the nonlinear terms are not the eigenfunctions of the Fock operator itself. We introduce asymptotic regularity conditions on the functions that build up the Fock operator which guarantee ellipticity for the local part of the Fock operator on the open stretched cone R+ × S². This proves existence of a parametrix with a corresponding smoothing remainder from which it follows, via a bootstrap argument, that the eigenfunctions of the Fock operator again satisfy asymptotic regularity conditions. Using a fixed-point approach based on Cances and Le Bris analysis of the level-shifting algorithm, we show via another bootstrap argument, that the corresponding self-consistent-field solutions of the Hartree-Fock equation have the same type of asymptotic regularity.},
  language  = {en}
}
@misc{FladHarutyunyanSchulze2015,
  author    = {Flad, Heinz-J{\"u}rgen and Harutyunyan, Gohar and Schulze, Bert-Wolfgang},
  title     = {Singular analysis and coupled cluster theory},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-102306},
  pages     = {31530 -- 31541},
  year      = {2015},
  abstract  = {The primary motivation for systematic bases in first principles electronic structure simulations is to derive physical and chemical properties of molecules and solids with predetermined accuracy. This requires a detailed understanding of the asymptotic behaviour of many-particle Coulomb systems near coalescence points of particles. Singular analysis provides a convenient framework to study the asymptotic behaviour of wavefunctions near these singularities. In the present work, we want to introduce the mathematical framework of singular analysis and discuss a novel asymptotic parametrix construction for Hamiltonians of many-particle Coulomb systems. This corresponds to the construction of an approximate inverse of a Hamiltonian operator with remainder given by a so-called Green operator. The Green operator encodes essential asymptotic information and we present as our main result an explicit asymptotic formula for this operator. First applications to many-particle models in quantum chemistry are presented in order to demonstrate the feasibility of our approach. The focus is on the asymptotic behaviour of ladder diagrams, which provide the dominant contribution to shortrange correlation in coupled cluster theory. Furthermore, we discuss possible consequences of our asymptotic analysis with respect to adaptive wavelet approximation.},
  language  = {en}
}
@book{Flach2003,
  author    = {Flach, Juliane},
  title     = {Die Auswirkungen der Unternehmenssteuerreform auf ausgew{\"a}hlte Unternehmen},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-8952},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {2003},
  abstract  = {Inhalt: Die Veranlagungssimulation im Kontext anderer Methoden zur Beurteilung von Steuerwirkungen -Steuerwirkungsanalyse in der betriebswirtschaftlichen Steuerlehre und der Finanzwissenschaft im Vergleich -Abgrenzung der Veranlagungssimulation von der Teilsteuerrechnung -Die Veranlagungssimulation als Komponente eines Simulationsmodells zur Politikanalyse Das System der deutschen Unternehmensbesteuerung in Abh{\"a}ngigkeit von der Rechtsform -Einzelunternehmen und Personengesellschaften -Kapitalgesellschaften Die Reform der Unternehmensbesteuerung -Gr{\"u}nde und Ziele der Reform der Unternehmensbesteuerung -Die Maßnahmen der Unternehmenssteuerreform im {\"U}berblick Entwicklung des Simulationsmodells -Datengrundlage der Untersuchung -Die Grundstruktur des Modells -Entwicklung der Veranlagungscodes: Veranlagung der Gewerbesteuer, Grundlagen der Gewerbesteuerfestsetzung, Veranlagung der K{\"o}rperschaftsteuer, Veranlagung der Einkommensteuer Darstellung der Ergebnisse der Veranlagungssimulation -{\"U}berblick {\"u}ber die konstituierenden Merkmale der Modellunternehmen -Die Steuerbelastungen der Unternehmen bei Veranlagung nach altem und neuem Steuerrecht im {\"U}berblick Der Rechtsformvergleich mit abgewandelten Modellunternehmen -Der Rechtsformvergleich bei Variation steuerlicher Sachverhaltsgestaltungen -Der Rechtsformvergleich bei Variation des Gewinns Zusammenfassung der Ergebnisse des Steuerbelastungs- und des Rechtsformvergleichs Kritische Betrachtung der durch den Gesetzgeber und die Br{\"u}hler Kommission gesetzten Ziele anhand der generierten Ergebnisse Steuerwirkungen auf Investitionen und Finanzierung Modellkritik},
  language  = {de}
}
@phdthesis{Fitzner2024,
  author    = {Fitzner, Maria},
  title     = {Cultivation of selected halophytes in saline indoor farming and modulation of cultivation conditions to optimize metabolite profiles for human nutrition},
  doi       = {10.25932/publishup-62697},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-626974},
  school      = {Universit{\"a}t Potsdam},
  pages     = {178},
  year      = {2024},
  abstract  = {With the many challenges facing the agricultural system, such as water scarcity, loss of arable land due to climate change, population growth, urbanization or trade disruptions, new agri-food systems are needed to ensure food security in the future. In addition, healthy diets are needed to combat non-communicable diseases. Therefore, plant-based diets rich in health-promoting plant secondary metabolites are desirable. A saline indoor farming system is representing a sustainable and resilient new agrifood system and can preserve valuable fresh water. Since indoor farming relies on artificial lighting, assessment of lighting conditions is essential. In this thesis, the cultivation of halophytes in a saline indoor farming system was evaluated and the influence of cultivation conditions were assessed in favor of improving the nutritional quality of halophytes for human consumption. Therefore, five selected edible halophyte species (Brassica oleracea var. palmifolia, Cochlearia officinalis, Atriplex hortensis, Chenopodium quinoa, and Salicornia europaea) were cultivated in saline indoor farming. The halophyte species were selected for to their salt tolerance levels and mechanisms. First, the suitability of halophytes for saline indoor farming and the influence of salinity on their nutritional properties, e.g. plant secondary metabolites and minerals, were investigated. Changes in plant performance and nutritional properties were observed as a function of salinity. The response to salinity was found to be species-specific and related to the salt tolerance mechanism of the halophytes. At their optimal salinity levels, the halophytes showed improved carotenoid content. In addition, a negative correlation was found between the nitrate and chloride content of halophytes as a function of salinity. Since chloride and nitrate can be antinutrient compounds, depending on their content, monitoring is essential, especially in halophytes. Second, regional brine water was introduced as an alternative saline water resource in the saline indoor farming system. Brine water was shown to be feasible for saline indoor farming of halophytes, as there was no adverse effect on growth or nutritional properties, e.g. carotenoids. Carotenoids were shown to be less affected by salt composition than by salt concentration. In addition, the interaction between the salinity and the light regime in indoor farming and greenhouse cultivation has been studied. There it was shown that interacting light regime and salinity alters the content of carotenoids and chlorophylls. Further, glucosinolate and nitrate content were also shown to be influenced by light regime. Finally, the influence of UVB light on halophytes was investigated using supplemental narrow-band UVB LEDs. It was shown that UVB light affects the growth, phenotype and metabolite profile of halophytes and that the UVB response is species specific. Furthermore, a modulation of carotenoid content in S. europaea could be achieved to enhance health-promoting properties and thus improve nutritional quality. This was shown to be dose-dependent and the underlying mechanisms of carotenoid accumulation were also investigated. Here it was revealed that carotenoid accumulation is related to oxidative stress. In conclusion, this work demonstrated the potential of halophytes as alternative vegetables produced in a saline indoor farming system for future diets that could contribute to ensuring food security in the future. To improve the sustainability of the saline indoor farming system, LED lamps and regional brine water could be integrated into the system. Since the nutritional properties have been shown to be influenced by salt, light regime and UVB light, these abiotic stressors must be taken into account when considering halophytes as alternative vegetables for human nutrition.},
  language  = {en}
}
@inproceedings{FitschenBruehlRathgeberetal.2019,
  author    = {Fitschen, Thomas and Br{\"u}hl, Tanja and Rathgeber, Theodor and H{\"u}fner, Klaus and Bloch, Yanina and Volger, Helmut},
  title     = {Herausforderungen f{\"u}r die gegenw{\"a}rtige deutsche UN-Politik},
  series = {Potsdamer UNO-Konferenzen},
  booktitle = {Potsdamer UNO-Konferenzen},
  number    = {13},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-455-5},
  issn      = {1617-4704},
  doi       = {10.25932/publishup-42615},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-426154},
  pages     = {123},
  year      = {2019},
  abstract  = {Am 30. Juni 2018 fand die vierzehnte Konferenz des Forschungskreises ­Vereinte Nationen zum Thema „Herausforderungen f{\"u}r die gegenw{\"a}rtige deutsche UN-Politik" statt. Die Konferenz widmet sich ihrem Schwerpunktthema in drei Vortr{\"a}gen, in denen einerseits die offizielle Sicht des Ausw{\"a}rtigen Amtes dargestellt und andererseits die Herausforderungen aus wissenschaftlicher Perspektive analysiert werden. Tanja Br{\"u}hl nimmt hierzu eine Gesamtbetrachtung der deutschen UN-Politik aus rollentheoretischer Sicht vor, w{\"a}hrend Theodor Rathgeber die deutsche Menschenrechtspolitik angesichts der im UN-Menschenrechtsrat bestehenden Herausforderungen untersucht. Der Band enth{\"a}lt drei weitere Texte, die Forschungsergebnisse zu aktuellen Entwicklungen pr{\"a}sentieren. Klaus H{\"u}fner er{\"o}rtert das aktuelle finanzielle Engagement Deutschlands in den Vereinten Nationen. Yanina Bloch zieht eine Bilanz nach den ersten acht Jahren der T{\"a}tigkeit von UN Women. Helmut Volger analysiert neue Fortschritte bei der Reform der Arbeitsmethoden des UN-Sicherheitsrates.},
  language  = {de}
}
@article{Fitschen2017,
  author    = {Fitschen, Thomas},
  title     = {Nach dem Review 2014},
  series = {Potsdamer UNO-Konferenzen},
  journal   = {Potsdamer UNO-Konferenzen},
  number    = {12},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-402-9},
  doi       = {10.25932/publishup-43096},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-430968},
  pages     = {41 -- 52},
  year      = {2017},
  language  = {de}
}
@article{Fitschen2019,
  author    = {Fitschen, Thomas},
  title     = {Deutschland im Sicherheitsrat der Vereinten Nationen 2019 - 2020},
  series = {Potsdamer UNO-Konferenzen},
  journal   = {Potsdamer UNO-Konferenzen},
  number    = {13},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-455-5},
  doi       = {10.25932/publishup-43147},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-431475},
  pages     = {9 -- 20},
  year      = {2019},
  language  = {de}
}
@misc{Fishbane2019,
  author    = {Fishbane, Eitan P.},
  title     = {The Book of Radiance},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien = Transformative Translations in Jewish History and Culture},
  volume    = {2019},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien = Transformative Translations in Jewish History and Culture},
  number    = {25},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-468-5},
  issn      = {1614-6492},
  doi       = {10.25932/publishup-47140},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-471404},
  pages     = {123 -- 132},
  year      = {2019},
  language  = {en}
}
@article{FischerKattner2017,
  author    = {Fischer-Kattner, Anke},
  title     = {Zeit-Not / Not-Zeit},
  series = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit},
  journal   = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-412333},
  pages     = {57 -- 95},
  year      = {2017},
  language  = {de}
}
@phdthesis{Fischer2005,
  author    = {Fischer, Thomas},
  title     = {Lichtinduzierte Orientierungsprozesse in Azobenzen-Polymeren},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7133},
  school      = {Universit{\"a}t Potsdam},
  year      = {2005},
  abstract  = {Die Beeinflussung optischer Eigenschaften durch Bestrahlung stellt eine Grundlage f{\"u}r die Herstellung anisotroper optischer Komponenten dar. In d{\"u}nnen Schichten von Azobenzen-Polymeren kann optische Anisotropie durch linear polarisierte Bestrahlung induziert oder modifiziert werden. Ziel der Arbeit war es, wesentliche Struktur-Eigenschafts-Beziehungen zum Prozess der Photoorientierung zu erarbeiten, um so eine Optimierung der Materialien f{\"u}r verschiedene Anwendungen erm{\"o}glichen. In isotropen Schichten fl{\"u}ssigkristalliner und amorpher Azobenzen-Polymeren wird das Ausmaß der induzierten optischen Anisotropie g{\"u}nstig durch eine Donor/Akzeptor-Substitution in 4,4'-Position beeinflusst. Die Induktionsgeschwindigkeit ist in Schichten fl{\"u}ssigkristalliner Polymeren deutlich geringer, jedoch lassen sich h{\"o}here Werte der Doppelbrechung und des Dichroismus erreichen. In Copolymeren bewirkt die Photoorientierung der Azobenzen-Seitengruppen eine kooperative Orientierung von formanisotropen Seitengruppen. Die Mesogenit{\"a}t der nicht-photochromen Seitengruppen erh{\"o}ht das Ausmaß der induzierten optischen Anisotropie. Die Stabilit{\"a}t der induzierten Doppelbrechung und des Dichroismus wird durch diese Gruppen gesteigert. In Schichten fl{\"u}ssigkristalliner Polymeren wird die induzierte optische Anisotropie beim Tempern im Bereich der Mesophasen erheblich verst{\"a}rkt. Dabei reicht ein geringes Maß an induzierter Anisotropie aus, um Doppelbrechungs- und Dichroismuswerte zu erzielen, wie sie f{\"u}r LC-Dom{\"a}nen typisch sind. In orientierten Schichten von Azobenzen-Polymeren wird das Resultat der linear polarisierten Bestrahlung durch die St{\"a}rke der anisotropen Wechselwirkungen in den fl{\"u}ssigkristallinen Dom{\"a}nen oder den LB-Multilayern bestimmt. Eine lichtinduzierte Reorientierung kann nur erreicht werden, wenn diese Wechselwirkungen {\"u}berwunden werden k{\"o}nnen. Erfolgt eine Photoreorientierung in den orientierten Polymerschichten, werden in Copolymeren formanisotrope Seitengruppen ebenfalls kooperativ reorientiert. Eine vorgelagerte UV-Bestrahlung kann durch Erzeugung eines hohen Anteils an nicht-mesogenen Z-Isomeren die anisotropen Wechselwirkungen stark schw{\"a}chen und so die Seitengruppen entkoppeln. Aus diesem Zustand erfolgt die Photoreorientierung mit einer der Photoorientierung in isotropen Schichten vergleichbaren Effizienz. Die erarbeiteten Struktur-Eigenschafts-Beziehungen liefern einen Beitrag zur Optimierung derartiger Materialien f{\"u}r Anwendungen in den Bereichen optischer Funktionsschichten, holographischer Datenspeicherung oder der Generierung von Oberfl{\"a}chenreliefgittern.},
  subject      = {Fl{\"u}ssigkristalline Polymere},
  language  = {de}
}
@article{Fischer2003,
  author    = {Fischer, Susann},
  title     = {Partitive vs. Genitive in Russian and Polish},
  series = {Linguistics in Potsdam},
  journal   = {Linguistics in Potsdam},
  number    = {21},
  issn      = {1616-7392},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-32457},
  pages     = {73 -- 89},
  year      = {2003},
  abstract  = {The present paper addresses a current view in the psycholinguistic literature that case exhibits processing properties distinct from those of other morphological features such as number (cf. Fodor \& Inoue, 2000; Meng \& Bader, 2000a/b). In a speeded-acceptability judgement experiment, we show that the low performance previously found for case in contrast to number violations is limited to nominative case, whereas violations involving accusative and dative are judged more accurately. The data thus do not support the proposal that case per se is associated with special properties (in contrast to other features such as number) in reanalysis processes. Rather, there are significant judgement differences between the object cases accusative and dative on the one hand and the subject nominative case on the other. This may be explained by the fact that nominative has a specific status in German (and many other languages) as a default case.},
  language  = {en}
}
@misc{Fischer2023,
  author    = {Fischer, Saskia},
  title     = {Klaus Holz und Thomas Haury, Antisemitismus gegen Israel (Hamburg: Hamburger Edition 2021), 424 S., 35,00 €},
  series = {PaRDeS : Journal of the Association for Jewish Studies in Germany},
  journal   = {PaRDeS : Journal of the Association for Jewish Studies in Germany},
  number    = {28},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-552-1},
  issn      = {1614-6492},
  doi       = {10.25932/publishup-58593},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-585935},
  pages     = {134 -- 137},
  year      = {2023},
  language  = {de}
}
@misc{FischerKorupVehetal.2021,
  author    = {Fischer, Melanie and Korup, Oliver and Veh, Georg and Walz, Ariane},
  title     = {Controls of outbursts of moraine-dammed lakes in the greater Himalayan region},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-52205},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-522050},
  pages     = {21},
  year      = {2021},
  abstract  = {Glacial lakes in the Hindu Kush-Karakoram-Himalayas-Nyainqentanglha (HKKHN) region have grown rapidly in number and area in past decades, and some dozens have drained in catastrophic glacial lake outburst floods (GLOFs). Estimating regional susceptibility of glacial lakes has largely relied on qualitative assessments by experts, thus motivating a more systematic and quantitative appraisal. Before the backdrop of current climate-change projections and the potential of elevation-dependent warming, an objective and regionally consistent assessment is urgently needed. We use an inventory of 3390 moraine-dammed lakes and their documented outburst history in the past four decades to test whether elevation, lake area and its rate of change, glacier-mass balance, and monsoonality are useful inputs to a probabilistic classification model. We implement these candidate predictors in four Bayesian multi-level logistic regression models to estimate the posterior susceptibility to GLOFs. We find that mostly larger lakes have been more prone to GLOFs in the past four decades regardless of the elevation band in which they occurred. We also find that including the regional average glacier-mass balance improves the model classification. In contrast, changes in lake area and monsoonality play ambiguous roles. Our study provides first quantitative evidence that GLOF susceptibility in the HKKHN scales with lake area, though less so with its dynamics. Our probabilistic prognoses offer improvement compared to a random classification based on average GLOF frequency. Yet they also reveal some major uncertainties that have remained largely unquantified previously and that challenge the applicability of single models. Ensembles of multiple models could be a viable alternative for more accurately classifying the susceptibility of moraine-dammed lakes to GLOFs.},
  language  = {en}
}
@misc{FischerBrettinRoessneretal.2022,
  author    = {Fischer, Melanie and Brettin, Jana and Roessner, Sigrid and Walz, Ariane and Fort, Monique and Korup, Oliver},
  title     = {Rare flood scenarios for a rapidly growing high-mountain city: Pokhara, Nepal},
  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    = {1284},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-57120},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-571209},
  pages     = {3105 -- 3123},
  year      = {2022},
  abstract  = {Pokhara (ca. 850 m a.s.l.), Nepal's second-largest city, lies at the foot of the Higher Himalayas and has more than tripled its population in the past 3 decades. Construction materials are in high demand in rapidly expanding built-up areas, and several informal settlements cater to unregulated sand and gravel mining in the Pokhara Valley's main river, the Seti Khola. This river is fed by the Sabche glacier below Annapurna III (7555 m a.s.l.), some 35 km upstream of the city, and traverses one of the steepest topographic gradients in the Himalayas. In May 2012 a sudden flood caused >70 fatalities and intense damage along this river and rekindled concerns about flood risk management. We estimate the flow dynamics and inundation depths of flood scenarios using the hydrodynamic model HEC-RAS (Hydrologic Engineering Center's River Analysis System). We simulate the potential impacts of peak discharges from 1000 to 10 000 m3 s-1 on land cover based on high-resolution Maxar satellite imagery and OpenStreetMap data (buildings and road network). We also trace the dynamics of two informal settlements near Kaseri and Yamdi with high potential flood impact from RapidEye, PlanetScope, and Google Earth imagery of the past 2 decades. Our hydrodynamic simulations highlight several sites of potential hydraulic ponding that would largely affect these informal settlements and sites of sand and gravel mining. These built-up areas grew between 3- and 20-fold, thus likely raising local flood exposure well beyond changes in flood hazard. Besides these drastic local changes, about 1 \% of Pokhara's built-up urban area and essential rural road network is in the highest-hazard zones highlighted by our flood simulations. Our results stress the need to adapt early-warning strategies for locally differing hydrological and geomorphic conditions in this rapidly growing urban watershed.},
  language  = {en}
}
@phdthesis{Fischer2022,
  author    = {Fischer, Melanie},
  title     = {Outburst floods in the Greater Himalayas},
  doi       = {10.25932/publishup-56997},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-569972},
  school      = {Universit{\"a}t Potsdam},
  pages     = {xviii, 155},
  year      = {2022},
  abstract  = {High-mountain regions provide valuable ecosystem services, including food, water, and energy production, to more than 900 million people worldwide. Projections hold, that this population number will rapidly increase in the next decades, accompanied by a continued urbanisation of cities located in mountain valleys. One of the manifestations of this ongoing socio-economic change of mountain societies is a rise in settlement areas and transportation infrastructure while an increased power need fuels the construction of hydropower plants along rivers in the high-mountain regions of the world. However, physical processes governing the cryosphere of these regions are highly sensitive to changes in climate and a global warming will likely alter the conditions in the headwaters of high-mountain rivers. One of the potential implications of this change is an increase in frequency and magnitude of outburst floods - highly dynamic flows capable of carrying large amounts of water and sediments. Sudden outbursts from lakes formed behind natural dams are complex geomorphological processes and are often part of a hazard cascade. In contrast to other types of natural hazards in high-alpine areas, for example landslides or avalanches, outburst floods are highly infrequent. Therefore, observations and data describing for example the mode of outburst or the hydraulic properties of the downstream propagating flow are very limited, which is a major challenge in contemporary (glacial) lake outburst flood research. Although glacial lake outburst floods (GLOFs) and landslide-dammed lake outburst floods (LLOFs) are rare, a number of documented events caused high fatality counts and damage. The highest documented losses due to outburst floods since the start of the 20th century were induced by only a few high-discharge events. Thus, outburst floods can be a significant hazard to downvalley communities and infrastructure in high-mountain regions worldwide. This thesis focuses on the Greater Himalayan region, a vast mountain belt stretching across 0.89 million km2. Although potentially hundreds of outburst floods have occurred there since the beginning of the 20th century, data on these events is still scarce. Projections of cryospheric change, including glacier-mass wastage and permafrost degradation, will likely result in an overall increase of the water volume stored in meltwater lakes as well as the destabilisation of mountain slopes in the Greater Himalayan region. Thus, the potential for outburst floods to affect the increasingly more densely populated valleys of this mountain belt is also likely to increase in the future. A prime example of one of these valleys is the Pokhara valley in Nepal, which is drained by the Seti Khola, a river crossing one of the steepest topographic gradients in the Himalayas. This valley is also home to Nepal's second largest, rapidly growing city, Pokhara, which currently has a population of more than half a million people - some of which live in informal settlements within the floodplain of the Seti Khola. Although there is ample evidence for past outburst floods along this river in recent and historic times, these events have hardly been quantified. The main motivation of my thesis is to address the data scarcity on past and potential future outburst floods in the Greater Himalayan region, both at a regional and at a local scale. For the former, I compiled an inventory of >3,000 moraine-dammed lakes, of which about 1\% had a documented sudden failure in the past four decades. I used this data to test whether a number of predictors that have been widely applied in previous GLOF assessments are statistically relevant when estimating past GLOF susceptibility. For this, I set up four Bayesian multi-level logistic regression models, in which I explored the credibility of the predictors lake area, lake-area dynamics, lake elevation, parent-glacier-mass balance, and monsoonality. By using a hierarchical approach consisting of two levels, this probabilistic framework also allowed for spatial variability on GLOF susceptibility across the vast study area, which until now had not been considered in studies of this scale. The model results suggest that in the Nyainqentanglha and Eastern Himalayas - regions with strong negative glacier-mass balances - lakes have been more prone to release GLOFs than in regions with less negative or even stable glacier-mass balances. Similarly, larger lakes in larger catchments had, on average, a higher probability to have had a GLOF in the past four decades. Yet, monsoonality, lake elevation, and lake-area dynamics were more ambiguous. This challenges the credibility of a lake's rapid growth in surface area as an indicator of a pending outburst; a metric that has been applied to regional GLOF assessments worldwide. At a local scale, my thesis aims to overcome data scarcity concerning the flow characteristics of the catastrophic May 2012 flood along the Seti Khola, which caused 72 fatalities, as well as potentially much larger predecessors, which deposited >1 km³ of sediment in the Pokhara valley between the 12th and 14th century CE. To reconstruct peak discharges, flow depths, and flow velocities of the 2012 flood, I mapped the extents of flood sediments from RapidEye satellite imagery and used these as a proxy for inundation limits. To constrain the latter for the Mediaeval events, I utilised outcrops of slackwater deposits in the fills of tributary valleys. Using steady-state hydrodynamic modelling for a wide range of plausible scenarios, from meteorological (1,000 m³ s-1) to cataclysmic outburst floods (600,000 m³ s-1), I assessed the likely initial discharges of the recent and the Mediaeval floods based on the lowest mismatch between sedimentary evidence and simulated flood limits. One-dimensional HEC-RAS simulations suggest, that the 2012 flood most likely had a peak discharge of 3,700 m³ s-1 in the upper Seti Khola and attenuated to 500 m³ s-1 when arriving in Pokhara's suburbs some 15 km downstream. Simulations of flow in two-dimensions with orders of magnitude higher peak discharges in ANUGA show extensive backwater effects in the main tributary valleys. These backwater effects match the locations of slackwater deposits and, hence, attest for the flood character of Mediaeval sediment pulses. This thesis provides first quantitative proof for the hypothesis, that the latter were linked to earthquake-triggered outbursts of large former lakes in the headwaters of the Seti Khola - producing floods with peak discharges of >50,000 m³ s-1. Building on this improved understanding of past floods along the Seti Khola, my thesis continues with an analysis of the impacts of potential future outburst floods on land cover, including built-up areas and infrastructure mapped from high-resolution satellite and OpenStreetMap data. HEC-RAS simulations of ten flood scenarios, with peak discharges ranging from 1,000 to 10,000 m³ s-1, show that the relative inundation hazard is highest in Pokhara's north-western suburbs. There, the potential effects of hydraulic ponding upstream of narrow gorges might locally sustain higher flow depths. Yet, along this reach, informal settlements and gravel mining activities are close to the active channel. By tracing the construction dynamics in two of these potentially affected informal settlements on multi-temporal RapidEye, PlanetScope, and Google Earth imagery, I found that exposure increased locally between three- to twentyfold in just over a decade (2008 to 2021). In conclusion, this thesis provides new quantitative insights into the past controls on the susceptibility of glacial lakes to sudden outburst at a regional scale and the flow dynamics of propagating flood waves released by past events at a local scale, which can aid future hazard assessments on transient scales in the Greater Himalayan region. My subsequent exploration of the impacts of potential future outburst floods to exposed infrastructure and (informal) settlements might provide valuable inputs to anticipatory assessments of multiple risks in the Pokhara valley.},
  language  = {en}
}
@misc{FischerWinterFelisattietal.2021,
  author    = {Fischer, Martin H. and Winter, Bodo and Felisatti, Arianna and Myachykov, Andriy and Jeglinski-Mende, Melinda A. and Shaki, Samuel},
  title     = {More Instructions Make Fewer Subtractions},
  series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  volume    = {12},
  journal   = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1866-8364},
  doi       = {10.25932/publishup-55008},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-550086},
  pages     = {1 -- 3},
  year      = {2021},
  abstract  = {Research on problem solving offers insights into how humans process task-related information and which strategies they use (Newell and Simon, 1972; {\"O}llinger et al., 2014). Problem solving can be defined as the search for possible changes in one's mind (Kahneman, 2003). In a recent study, Adams et al. (2021) assessed whether the predominant problem solving strategy when making changes involves adding or subtracting elements. In order to do this, they used several examples of simple problems, such as editing text or making visual patterns symmetrical, either in naturalistic settings or on-line. The essence of the authors' findings is a strong preference to add rather than subtract elements across a diverse range of problems, including the stabilizing of artifacts, creating symmetrical patterns, or editing texts. More specifically, they succeeded in demonstrating that "participants were less likely to identify advantageous subtractive changes when the task did not (vs. did) cue them to consider subtraction, when they had only one opportunity (vs. several) to recognize the shortcomings of an additive search strategy or when they were under a higher (vs. lower) cognitive load" (Adams et al., 2021, p. 258). Addition and subtraction are generally defined as de-contextualized mathematical operations using abstract symbols (Russell, 1903/1938). Nevertheless, understanding of both symbols and operations is informed by everyday activities, such as making or breaking objects (Lakoff and N{\´u}{\~n}ez, 2000; Fischer and Shaki, 2018). The universal attribution of "addition bias" or "subtraction neglect" to problem solving activities is perhaps a convenient shorthand but it overlooks influential framing effects beyond those already acknowledged in the report and the accompanying commentary (Meyvis and Yoon, 2021). Most importantly, while Adams et al.'s study addresses an important issue, their very method of verbally instructing participants, together with lack of control over several known biases, might render their findings less than conclusive. Below, we discuss our concerns that emerged from the identified biases, namely those regarding the instructions and the experimental materials. Moreover, we refer to research from mathematical cognition that provides new insights into Adams et al.'s findings.},
  language  = {en}
}
@misc{FischerSixtusGoebel2015,
  author    = {Fischer, Martin H. and Sixtus, Elena and G{\"o}bel, Silke M.},
  title     = {Commentary},
  series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {420},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-406260},
  pages     = {3},
  year      = {2015},
  abstract  = {kein Abstract vorhanden},
  language  = {en}
}
@misc{FischerShaki2015,
  author    = {Fischer, Martin H. and Shaki, Samuel},
  title     = {Two steps to space for numbers},
  series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {412},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-406522},
  pages     = {3},
  year      = {2015},
  language  = {en}
}
@misc{FischerMiklashevskyShaki2019,
  author    = {Fischer, Martin H. and Miklashevsky, Alex A. and Shaki, Samuel},
  title     = {Commentary : The Developmental Trajectory of the Operational Momentum Effect},
  series = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam Humanwissenschaftliche Reihe},
  number    = {502},
  issn      = {1866-8364},
  doi       = {10.25932/publishup-42316},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-423169},
  pages     = {3},
  year      = {2019},
  language  = {en}
}