cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum many-body dynamics of driven-dissipative Rydberg polariton systems
Creators: name: Pistorius, Tim
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: Polaritonen
subject: Rydberg Atome
subject: Vielteilchen
subject: Variationsprinzip
subject: Offene Quantensysteme
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present the successful solution of the notoriously hard but experimentally highly relevant many-body problem of driven-dissipative Rydberg polaritons in an optical lattice. From the continuous model, we derive a dispersion relation and construct the respective Wannier functions of the bands. We derive a Bose-Hubbard-like model for the dark-state polaritons in consideration of the interaction with the surrounding bright-state polariton bands. We then study the dynamics of this system with the Lindblad master equation to also include dissipative processes. To solve it, we use a variational approach in combination with a hard-sphere constraint to describe the Rydberg blockade. We compare these results with the solution from a Monte-Carlo wave function simulation where we find a good agreement between the two solutions for larger system sizes. We then use the variational approach to obtain a result for a system size of $N= 40$, which far exceeds the possible site number obtainable via Monte-Carlo simulations. In the end, we also study the time correlation between measurements of two photons leaving the system after they travelled through the entire lattice. The problem of the description of the infinite Hilbert space that occurs in bosonic fields is also a highly relevant topic in the context of many-body systems. Here, we show a new way to use the variational principle to describe any bosonic field by the usage of the P-representation of the density matrix in combination with the formulation of the master equation in terms of equations of motion. By investigating the bistability region of the driven-dissipative Jaynes-Cummings model, we show that our method exceeds conventional mean-field descriptions. We then extend the new approach by adding correlation functions as additional variational parameters to describe correlations between different parts of the Hilbert space. This allows us to investigate the effective three-boson model which describes Rydberg atoms inside a driven cavity with dissipation channels for the atoms and the cavity. The Rydberg-Rydberg interaction leads to correlations between the atoms which in turn cause a squeezing effect of the different bosonic modes. By a transformation of the model into the polariton picture, we show how the squeezing mostly affects the dark-state polaritons and its scaling with the pumping rate of the cavity. The last part focuses on the dissipative Ising model and its realisation through the coupling of internal states of ions and their vibrational modes. Furthermore, we present a measurement protocol that reduces unwanted detuning terms that can arrive from systematic errors in experiments.
Biokatalytische Wege zur Darstellung funktioneller Sesquiterpene
Creators: name: Hartwig, Steffen
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Sesquiterpenes
subject: terpene synthases
subject: synthetic biology
subject: Sesquiterpene
subject: Terpensynthasen
subject: synthetische Biologie
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie

description: [no abstract]
Einsatz Aptamer-modifizierter Gold-Nanopartikel in der Diagnostik
Creators: name: Eilers, Alina
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: aptamer
subject: oligonucleotide
subject: gold-nanoparticle
subject: lateral flow assay
subject: diagnostics
subject: Ochratoxin A
subject: Aptamer
subject: Oligonukleotid
subject: Gold-Nanopartikel
subject: Lateral Flow Assay
subject: Diagnostik
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Ein Lateral Flow Assay (LFA) ermöglicht eine schnelle Detektion von Krankheitserregern, Hormonen oder Verunreinigungen. Gleichzeitig sind LFAs kostengünstig und einfach anwendbar, so dass sie auch von nicht fachkundigen Personen durchgeführt werden können. In der vorliegenden Dissertation sollte ein Lateral Flow Assay entwickelt werden, der Aptamere bzw. Oligonukleotide anstelle der standardmäßig eingesetzten Antikörper als Detektionsmoleküle verwendet. Als diagnostisches Target wurde das Mykotoxin Ochratoxin A ausgewählt, das von Schimmelpilzen produziert wird und Lebensmittel verunreinigen kann. Zunächst wurde ein geeignetes Aptamer zur Detektion von Ochratoxin A ausgewählt. Dazu wurde die Affinität mithilfe der Microscale Thermophorese und Microarrays bestimmt. Für die Detektion des Mykotoxins auf einem Lateral Flow Assay wird ein zum Aptamer komplementäres Oligonukleotid (cOligo) benötigt, da der Assay auf einer Verdrängung des cOligos durch das Ochratoxin A beruht. Die Affinität des cOligos zum Aptamer sowie seine kompetitive Verdrängung durch Ochratoxin A wurde mit den gleichen Methoden untersucht. Der spätere Assay soll mithilfe einer optischen Testlinie, unter Verwendung von Gold-Nanopartikeln zur Signalgebung, ausgewertet werden. Diese Partikel wurden mithilfe verschiedener Methoden synthetisiert und durch die Rasterelektronenmikroskopie sowie UV-Vis-Spektroskopie analysiert. Für weitere Versuche wurden homogene Gold-Nanopartikel mit einem Durchmesser kleiner als 20 nm verwendet. Mit Thiol-modifizierten Oligonukleotiden wurden die Gold-Nanopartikel funktionalisiert und die Konjugate mittels UV-Vis-Spektroskopie und Dynamischer Lichtstreuung charakterisiert. Zur Überprüfung der Funktionalität der Konjugate wurde ein Bindungsassay der 3 Bindungspartner in Lösung entwickelt sowie Dot Blots mit immobilisierten Bindungspartnern durchgeführt. Abschließend wurde der Versuchsaufbau auf einen Lateral Flow Assay übertragen.
Electric-Field-Induced Resistive Switching in a Family of Mott Insulators : towards Non-Volatile Mott-RRAM Memories
Creators: name: Cario, Laurent
name: Vaju, Cristian
name: Corraze, Benoit
name: Guiot, Vincent
name: Janod, Etienne
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The fundamental building blocks of modern silicon-based microelectronics, such as double gate transistors in non-volatile Flash memories, are based on the control of electrical resistance by electrostatic charging. Flash memories could soon reach their miniaturization limits mostly because reliably keeping enough electrons in an always smaller cell size will become increasingly difficult . The control of electrical resistance at the nanometer scale therefore requires new concepts, and the ultimate resistance-change device is believed to exploit a purely electronic phase change such as the Mott insulator to insulator transition [2]. Here we show that application of short electric pulses allows to switch back and forth between an initial high-resistance insulating state ("0" state) and a low-resistance "metallic" state ("1" state) in the whole class of Mott Insulator compounds AM4X8 (A = Ga, Ge; M= V, Nb, Ta; X = S, Se). We found that electric fields as low as 2 kV/cm induce an electronic phase change in these compounds from a Mott insulating state to a metallic-like state. Our results suggest that this transition belongs to a new class of resistive switching and might be explained by recent theoretical works predicting that an insulator to metal transition can be achieved by a simple electric field in a Mott Insulator. This new type of resistive switching has potential to build up a new class of Resistive Random Access Memory (RRAM) with fast writing/erasing times (50 ns to 10 μs) and resistance ratios ΔR/R of the order of 25% at room temperature.
Aufklärung des Zusammenhangs zwischen spektraler Information und molekularen Eigenschaften von Polymeren
Creators: name: Gräfe, Alexander
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Spectroscopy
subject: molar mass
subject: mooney viscosity
subject: Spektroskopie
subject: Molmasse
subject: Mooney-Viskosität
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Selenium-Jupiter: A JUnit 5 extension for Selenium WebDriver
Creators: name: García, Boni
name: Kloos, Carlos Delgado
name: Alario-Hoyos, Carlos
name: Munoz-Organero, Mario
Publisher: name: arXiv
Year: 2024
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences
subject: D.2
subject: 68

description: Selenium WebDriver is a library that allows controlling web browsers (e.g., Chrome, Firefox, etc.) programmatically. It provides a cross-browser programming interface in several languages used primarily to implement end-to-end tests for web applications. JUnit is a popular unit testing framework for Java. Its latest version (i.e., JUnit 5) provides a programming and extension model called Jupiter. This paper presents Selenium-Jupiter, an open-source JUnit 5 extension for Selenium WebDriver. Selenium-Jupiter aims to ease the development of Selenium WebDriver tests thanks to an automated driver management process implemented in conjunction with the Jupiter parameter resolution mechanism. Moreover, Selenium-Jupiter provides seamless integration with Docker, allowing the use of different web browsers in Docker containers out of the box. This feature enables cross-browser testing, load testing, and troubleshooting (e.g., configurable session recordings). This paper presents an example case in which Selenium-Jupiter is used to evaluate the performance of video conferencing systems based on WebRTC. This example case shows that Selenium-Jupiter can build and maintain the required infrastructure for complex tests effortlessly.
description: 37 pages, 10 figures
Evaluating digital policy interventions: studies in violence prevention, deradicalization, and investor protection
Creators: name: Ebers, Axel
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2022
Subjects: subject: Soziale Medien
subject: Online-Interventionen
subject: Prävention
subject: Wirkungsevaluation
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: Social media platforms allow individuals without great technical knowledge or financial capital to spread violent content and radical messages among a large audience, bypassing traditional media. As violence and radical actions cause significant economic damage and undermine democratic institutions, security agencies have responded by using the same platforms to target at-risk individuals with their prevention programs. The literature has shown that such online programs can be effective in reducing victimization and perpetration rates. However, despite the large number of programs implemented, there is a significant lack of rigorous impact evaluations. This thesis contributes to the literature by developing a conceptual framework for evaluating the impact and economic efficiency of online programs for crime prevention in general. Furthermore, it contributes by evaluating the impact of two online programs in the areas of violence prevention and deradicalization. To reassess the impact of such online programs in a different prevention context, the thesis also evaluates a measure for investor protection in the context of the Bitcoin cryptocurrency.
The Quantum Energy Density: Improved Efficiency for Quantum Monte Carlo
Creators: name: Krogel, Jaron T.
name: Yu, Min
name: Kim, Jeongnim
name: Ceperley, David M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We establish a physically meaningful representation of a quantum energy density for use in Quantum Monte Carlo calculations. The energy density operator, defined in terms of Hamiltonian components and density operators, returns the correct Hamiltonian when integrated over a volume containing a cluster of particles. This property is demonstrated for a helium-neon "gas," showing that atomic energies obtained from the energy density correspond to eigenvalues of isolated systems. The formation energies of defects or interfaces are typically calculated as total energy differences. Using a model of delta-doped silicon (where dopant atoms form a thin plane) we show how interfacial energies can be calculated more efficiently with the energy density, since the region of interest is small. We also demonstrate how the energy density correctly transitions to the bulk limit away from the interface where the correct energy is obtainable from a separate total energy calculation.
description: 11 pages, 4 figures
title: Renibacterium salmoninarum and Aeromonas salmonicida pathogenesis and virulence in lumpfish (Cyclopterus lumpus)
Creators: name: Gnanagobal, Hajarooba
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Renibacterium salmoninarum, the etiological agent of Bacterial Kidney Disease (BKD), and Aeromonas salmonicida, which causes furunculosis, are economically important pathogens of marine fish. The marine teleost lumpfish (Cyclopterus lumpus) is an eco-friendly cleaner fish in Atlantic salmon (Salmo salar) farming. As the lumpfish demand in salmonid aquaculture continues to rise, understanding how lumpfish interact with well-known Gram-positive and Gram-negative fish pathogens is certainly required. Therefore, in my Ph.D. thesis, I studied the interactions between lumpfish host and Grampositive R. salmoninarum or Gram-negative A. salmonicida with a particular focus on the fundamental aspects of bacterial pathogenicity and virulence. First, I evaluated the lumpfish susceptibility and immune response to R. salmoninarum infection. Lumpfish showed typical BKD clinical signs and 35 % mortality when infected with a high dose of R. salmoninarum (1×109 cells dose-1). High bacterial loads were observed in tissues (i.e., spleen, liver, and head kidney) at 28 days post-infection (dpi), and R. salmoninarum continued to persist in tissues until 98 dpi. Further, gene expression analysis using qPCR in the fish head kidney found that R. salmoninarum causes immune suppression at 28 dpi and lumpfish induce a cell-mediated immune response at 98 dpi. Second, I profiled the lumpfish head kidney transcriptome response to R. salmoninarum at early (28 dpi) and chronic (98 dpi) infection using RNA sequencing. Compared to 98 dpi, lumpfish induced many molecular pathways and genes at 28 dpi. For instance, R. salmoninarum-induced genes at 28 dpi were linked to innate and adaptive immunity, while R. salmoninarum-suppressed genes were involved in amino acid metabolism, cellular and developmental processes. In contrast, the transcriptome response of the lumpfish head kidney to this pathogen was minimal at 98 dpi, with R. salmoninarumdependent dysregulation of genes primarily connected to cell-mediated adaptive immunity. Third, I described the riboflavin supply pathways of A. salmonicida. Using in silico tools and RT-PCR, I found that A. salmonicida has a riboflavin biosynthesis pathway (RBP) and a riboflavin transporter. Moreover, I constructed the deletion mutants of riboflavin biosynthesis genes, their duplicated copies, and the transporter (ribN) of A. salmonicida and studied their role in virulence and potential as live-attenuated vaccine candidates using the lumpfish infection model. The results showed that riboflavin biosynthesis is crucial for A. salmonicida virulence. Overall, the thesis provided fundamental insights into the pathogenicity and virulence of R. salmoninarum and A. salmonicida and lumpfish response. The findings presented here are valuable for developing immunoprophylactic measures for lumpfish against BKD and furunculosis.
The Infinitesimal Torelli Theorem for Irregular Varieties
Creators: name: Bloß, Patrick Alexander
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2021
Subjects: subject: infinitesimal Torelli theorem
subject: period map
subject: irregular varieties
subject: abelian varieties
subject: ample divisors
subject: projective normality
subject: infinitesimaler Torelli-Satz
subject: Periodenabbildung
subject: irreguläre Varietäten
subject: abelsche Varietäten
subject: ample Divisoren
subject: projektive Normalität
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: In this thesis we prove the infinitesimal Torelli theorem for certain classes of irregular varieties. Given a compact Kähler manifold, the infinitesimal Torelli problem asks whether the differential of the period map of a Kuranishi family is injective. Unlike the classical Torelli theorem for curves, there is a negative answer for example for hyperelliptic curves of genus greater than 2. Nevertheless, the infinitesimal Torelli theorem holds for many other classes of manifolds. Following Green’s proof for sufficiently ample hypersurfaces in arbitrary varieties, we prove it for smooth ample hypersurfaces and more generally complete intersections in general abelian varieties by reducing it to showing the surjectivity of certain multiplication maps of vector bundles on the ambient abelian variety. Then we derive numerical conditions for such multiplication maps to be surjective giving an effective bound on Green’s result in this particular case. We also investigate the more general case of irregular varieties with globally generated cotangent bundle which do not embed into their Albanese varieties.
title: Polyamid-Oligomere: Kunststoffbestandteile aus Küchenutensilien: Stellungnahme Nr. 014/2018 des BfR vom 30. Mai 2018
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2018
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2018, no. 011
title: Für gesunde Zähne: Fluorid-Vorbeugung bei Säuglingen und Kleinkindern: Stellungnahme Nr. 015/2018 des BfR vom 31. Mai 2018
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2018
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2018, no. 15
Pierre Colman, L’Orfèvrerie religieuse liègeoise du XVe Siècle à la Revolution
Creators: name: Grimme, Ernst Günther
Publisher: name: Aachener Kunstblätter
Year: 2017

description: Rezension zu:

Pierre Colman, L’Orfèvrerie religieuse liègeoise du XVe Siècle à la Revolution, Liège 1966, Bd. 1 (Text und Katalog): 298 S., Bd. 2 (Register und Tafeln): 109 S., 244 Abb.
description: Aachener Kunstblätter, Bd. 40 (1971): Aachener Kunstblätter
The effect of inertia on the Dirac electron, the spin Hall current and the momentum space Berry curvature
Creators: name: Chowdhury, Debashree
name: Basu, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We have studied the spin dependent force and the associated momentum space Berry curvature in an accelerating system. The results are derived by taking into consideration the non relativistic limit of a generally covariant Dirac equation under the presence of electromagnetic field where the methodology of Foldy-Wouthuysen transformation is applied to achieve the non relativistic limit. Spin currents appear due to the combined action of the external electric field, crystal field and the induced inertial electric field via the total effective spin-orbit interaction. In an accelerating frame, the crucial role of momentum space Berry curvature in the spin dynamics has also been addressed from the perspective of spin Hall conductivity. For time dependent acceleration, the expression for the spin polarization has been derived.
description: 12 Pages, 1 figure. arXiv admin note: substantial text overlap with arXiv:1212.4625
Galium mollugo
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G.Mollugo X verum ssp. verum Cat. 177. 2: Zwischen Miege und Salgesch, bei der Brücke über die Raspille (Thommen). - 3: Riddes (Besse; Becherer und Thommen); Visperterminen (J.). - 3a: Simplon-Dorf-Gabi; Gondo- Schlucht; Gondo, unteres Zwischbergental (alles: Becherer).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Untersuchungen an oxidischen und oxifluoridischen Materialmischungen zur Optimierung von ionenstrahlgesputterten Dünnschichtsystemen für Hochleistungslaserkompenten
Creators: name: Mende, Mathias
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2018
Subjects: subject: Thin film technology
subject: ion beam sputtering (IBS)
subject: mixture materials
subject: UV-coatings
subject: laser-induced damage threshold (LIDT)
subject: Dünnschichttechnologie
subject: Ionenstrahlsputtern
subject: Materialmischungen
subject: UV-Beschichtungen
subject: laserinduzierte Zerstörschwelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Charge carrier transport in molecularly doped polycarbonate as a test case for the dipolar glass model
Creators: name: Novikov, S. V.
name: Tyutnev, A. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present the results of Monte-Carlo simulations of the charge carrier transport in a disordered molecular system containing spatial and energetic disorders using the dipolar glass model. Model parameters of the material were chosen to fit a typical polar organic photoconductor polycarbonate doped with 30% of aromatic hydrazone, whose transport properties are well documented in literature. Simulated carrier mobility demonstrates a usual Poole-Frenkel field dependence and its slope is very close to the experimental value without using any adjustable parameter. At room temperature transients are universal with respect to the electric field and transport layer thickness. At the same time, carrier mobility does not depend on the layer thickness and transients develop a well-defined plateau where the current does not depend on time, thus demonstrating a non-dispersive transport regime. Tails of the transients decay as power law with the exponent close to -2. This particular feature indicates that transients are close to the boundary between dispersive and non-dispersive transport regimes. Shapes of the simulated transients are in very good agreement with the experimental ones. In summary, we provide a first verification of a self-consistency of the dipolar glass transport model, where major transport parameters, extracted from the experimental transport data, are then used in the transport simulation, and the resulting mobility field dependence and transients are in very good agreement with the initial experimental data.
description: 10 pages, 8 figures
Isotropization in Chaplygin matter universes connected by a wormhole
Creators: name: Mokeeva, Anna
name: Popov, Vladimir
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Chaplygin anisotropic matter governing the cosmological evolution in two identical universes with an intermediate static spherically symmetric region is considered. The static region contains a wormhole allowing one to pass etween two horizons. The metric in the non-static region represents a kind of an anisotropic Kantowski-Sachs cosmological model starting from a horizon instead the initial singularity. A classification of the cosmologies with a monotonic late stage is presented. It is shown that only one scenario can involve a de Sitter regime. The scales in the de Sitter phase allows one to describe the earliest accelerated expansion on the classical level.
description: 15 pages, 9 figures. arXiv admin note: text overlap with arXiv:1205.1542
title: Metamorphic evolution of lower crustal xenoliths from the Mojave Desert, southeastern California: a petrochronologic approach
Creators: name: Costello, Kirsten E.
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: A suite of lower crustal xenoliths brought to the surface in a mid-Tertiary andesitic dike in the North Piute Mountains of the Mojave Desert, southeastern California, preserve fundamental geologic information about the pre-extensional Tertiary lower crust that is otherwise inaccessible for direct study. This xenolith suite consists of aluminous, quartzose, quartzofeldspathic, and mafic rocks, interpreted to represent Paleoproterozoic crustal material that experienced granulite facies metamorphism and anatexis during Mesozoic crustal thickening. The aluminous xenoliths, the primary focus of this study because of their mineralogy and thus suitability for thermobarometric calculations, consist of quartz + garnet + rutile + plagioclase + K-feldspar + biotite + kyanite + sillimanite, and trace zircon, monazite, and apatite. The mineralogy and microstructures are consistent with biotite dehydration melting in the kyanite stability field, significant anatectic melt loss at granulite facies conditions, and minor melt crystallization with kyanite and sillimanite upon cooling. Microstructures and mineral chemistry integrated with phase equilibria modelling suggest a P–T path with peak P of 1.2 to 1.3 GPa, and T of 850 to 870 °C, consistent with a pre-extensional Tertiary lower crustal depth of about 44 to 48 km, followed by decompression. Inheritance and timing of metamorphism are constrained by U–Pb and Lu–Hf isotopes in zircon, and U–Pb and Sm–Nd isotopes in monazite. Zircon cores preserve Archean and Proterozoic isotopic inheritance linked to formation of the Mojave crust. Zircon rims and monazites yield late Cretaceous U–Pb dates consistent with the timing of the Laramide Orogeny and metaluminous to peraluminous granite crystallization in the Mojave. Initial εHfi and εNdi values for zircon rim and monazite are consistent with growth from a melt extracted from an evolved crustal reservoir. The U-Pb dates suggest that decompression following peak P–T can most likely be attributed to crustal thinning after the Laramide Orogeny. Trace element composition of zircon and monazite provide a link between U–Pb dates and prograde garnet growth which in turn are used to establish a cohesive P–T–t history for the Mojave xenolith suite.
On symmetries and conserved quantities in Nambu mechanics
Creators: name: Fecko, Marian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In Hamiltonian mechanics, a (continuous) symmetry leads to conserved quantity, which is a function on (extended) phase space. In Nambu mechanics, a straightforward consequence of symmetry is just a relative integral invariant, a differential form which only upon integration over a cycle provides a conserved real number. The origin of the difference may be traced back to a shift in degrees of relevant forms present in equations of motion, or, alternatively, to a corresponding shift in degrees of relevant objects in action integral for Nambu mechanics.
Integral representations and summations of modified Struve function
Creators: name: Baricz, Árpád
name: Pogány, Tibor K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C10, 33E20, 40H05, 30B50, 40C10, 65B10

description: It is known that Struve function $\mathbf H_ν$ and modified Struve function $\mathbf L_ν$ are closely connected to Bessel function of the first kind $J_ν$ and to modified Bessel function of the first kind $I_ν$ and possess representations through higher transcendental functions like generalized hypergeometric ${}_1F_2$ and Meijer $G$ function. Also, the NIST project and Wolfram formula collection contain a set of Kapteyn type series expansions for $\mathbf L_ν(x)$. In this paper firstly, we obtain various another type integral representation formulae for $\mathbf L_ν(x)$ using the technique developed by D. Jankov and the authors. Secondly, we present some summation results for different kind of Neumann, Kapteyn and Schlömilch series built by $I_ν(x)$ and $\mathbf L_ν(x)$ which are connected by a Sonin--Gubler formula, and by the associated modified Struve differential equation. Finally, solving a Fredholm type convolutional integral equation of the first kind, Bromwich--Wagner line integral expressions are derived for the Bessel function of the first kind $J_ν$ and for an associated generalized Schlömilch series.
description: 18 pages, to appear in Acta Mathematica Hungarica
Exact sum rules for inhomogeneous strings
Creators: name: Amore, Paolo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We derive explicit expressions for the sum rules of the eigenvalues of inhomogeneous strings with arbitrary density and with different boundary conditions. We show that the sum rule of order $N$ may be obtained in terms of a diagrammatic expansion, with $(N-1)!/2$ independent diagrams. These sum rules are used to derive upper and lower bounds to the energy of the fundamental mode of an inhomogeneous string; we also show that it is possible to improve these approximations taking into account the asymptotic behaviour of the spectrum and applying the Shanks transformation to the sequence of approximations obtained to the different orders. We discuss three applications of these results.
description: 26 pages, 6 figures, 4 tables
Multiwavelength Photometry and Hubble Space Telescope Spectroscopy of the Old Nova V842 Centaurus
Creators: name: Sion, Edward M.
name: Szkody, Paula
name: Mukadam, Anjum
name: Warner, Brian
name: Woudt, Patrick
name: Walter, Frederic
name: Henden, Arne
name: Godon, Patrick
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present ground-based optical and near infrared photometric observations and Hubble Space Telescope COS spectroscopic observations of the old nova V842 Cen (Nova Cen 1986). Analysis of the optical light curves reveals a peak at 56.5 +/- 0.3s with an amplitude of 8.9 +/- 4.2 mma, which is consistent with the rotation of a magnetic white dwarf primary in V842 Cen that was detected earlier by Woudt et al., and led to its classification as an intermediate polar.However, our UV lightcurve created from the COS time-tag spectra does not show this periodicity. Our synthetic spectral analysis of an HST COS spectrum rules out a hot white dwarf photosphere as the source of the FUV flux. The best-fitting model to the COS spectrum is a full optically thick accretion disk with no magnetic truncation, a low disk inclination angle, low accretion rate and a distance less than half the published distance that was determined on the basis of interstellar sodium D line strengths.Truncated accretion disks with truncation radii of 3Rwd and 5Rwd yielded unsatisfactory agreement with the COS data. The accretion rate is unexpectedly low for a classical nova only 24 years after the explosion when the accretion rate is expected to be high and the white dwarf should still be very hot, especially if irradiation of the donor star took place. Our low accretion rate is consistent with low accretion rates derived from X-ray and ground-based optical data.
description: The Astrophysical Journal, 2013, in press
Ein mechanisch basiertes Dehnungsmodell für ermüdungsbeanspruchten Beton
Creators: name: Haar, Christoph Von Der
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Concrete
subject: fatigue loading
subject: strain development
subject: additive strain model
subject: creep-relevant load level
subject: Beton
subject: Ermüdungsbeanspruchung
subject: Dehnungsentwicklung
subject: additives Dehnungsmodell
subject: kriechaffines Spannungsniveau
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::624 | Ingenieurbau und Umwelttechnik

description: [no abstract]
Galium mollugo
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G. Mollugo X verum ssp. Wirtgeni - 2: Mazembroz-Saillon (Garns). - 3: Charrat (Garns).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Doob-Martin-Theorie diskreter Markov-Ketten : Struktur und Anwendungen
Creators: name: Hagemann, Klaas
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Kombinatorische Markov-Ketten
subject: Doob-Martin-Theorie
subject: Auswahlalgorithmen. - Combinatorial Markov chains
subject: Doob-Martin theory
subject: election algorithms
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: [no abstract]
Far-ultraviolet Observations of the Taurus-Perseus-Auriga Complex
Creators: name: Lim, Tae-Ho
name: Min, Kyoung-Wook
name: Seon, Kwang-Il
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have constructed a far-ultraviolet (FUV) continuum map of the Taurus-Auriga-Perseus complex, one of the largest local associations of dark clouds, by merging the two data sets of GALEX and FIMS, which made observations at similar wavelengths. The FUV intensity varies significantly across the whole region, but the diffuse FUV continuum is dominated by dust scattering of stellar photons. A diffuse FUV background of $\sim$1000 CU is observed, part of which may be attributable to the scattered photons of foreground FUV light, located in front of the thick clouds. The fluorescent emission of molecular hydrogen constitutes $\sim$10% of the total FUV intensity throughout the region, generally proportional to the local continuum level. We have developed a Monte Carlo radiative transfer code and applied it to the present clouds complex to obtain the optical properties of dust grains and the geometrical structures of the clouds. The albedo and the phase function asymmetry factor were estimated to be $0.42^{+0.05}_{-0.05}$, and $0.47^{+0.11}_{-0.27}$, respectively, in accordance with theoretical estimations as well as recent observations. The distance and thickness of the four prominent clouds in this complex were estimated using a single slab model applied individually to each cloud. The results obtained were in good agreement with those from other observations in the case of the Taurus cloud, as its geometrical structure is rather simple. For other clouds, which were observed to have multiple components, the results gave distances and thicknesses encompassing all components of each cloud. The distance and thickness estimations were not crucially sensitive to the exact values of the albedo and the phase function asymmetry factor, while the locations of the bright field stars relative to the clouds as initial photon sources seem to be the most important factor in the process of fitting.
Experimental analysis of Einstein-Podolsky-Rosen steering for quantum information applications
Creators: name: Händchen, Vitus
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Steering
subject: squeezed light
subject: quantum key distribution
subject: Quantenlenkung
subject: gequetschtes Licht
subject: Quantenschlüsselverteilung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Classification of Stochastic Runge-Kutta Methods for the Weak Approximation of Stochastic Differential Equations
Creators: name: Debrabant, Kristian
name: Rößler, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65C30, 60H35, 65C20, 68U20

description: In the present paper, a class of stochastic Runge-Kutta methods containing the second order stochastic Runge-Kutta scheme due to E. Platen for the weak approximation of Itô stochastic differential equation systems with a multi-dimensional Wiener process is considered. Order one and order two conditions for the coefficients of explicit stochastic Runge-Kutta methods are solved and the solution space of the possible coefficients is analyzed. A full classification of the coefficients for such stochastic Runge-Kutta schemes of order one and two with minimal stage numbers is calculated. Further, within the considered class of stochastic Runge-Kutta schemes coefficients for optimal schemes in the sense that additionally some higher order conditions are fulfilled are presented.
Exceptional hyperbolic 3-manifolds
Creators: name: Gabai, David
name: Trnkova, Maria
Publisher: name: arXiv
Year: 2013
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M50

description: We correct and complete a conjecture of D. Gabai, R. Meyerhoff and N. Thurston on the classification and properties of thin tubed closed hyperbolic 3-manifolds. We additionally show that if N is a closed hyperbolic 3-manifold, then either N=Vol3 or N contains a closed geodesic that is the core of an embedded tube of radius log(3)/2.
description: 22 pages, 2 figures
Untersuchung der Stromverdrängung im Ständer hoch ausgenutzter elektrischer Maschinen
Creators: name: Junginger, Christoph
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Current displacement
subject: Eddy effect
subject: AC resistance
subject: Stromverdrängung
subject: Wirbelstromeffekt
subject: Widerstandserhöhung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: [no abstract]
Zentrale Wärmeversorgung mit Biogasanlagen und Wärmepumpen in ländlichen niedersächsischen Kommunen
Creators: name: Kahle, Matthias
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: District heating
subject: rural area
subject: heat pump
subject: biogas
subject: Fernwärme
subject: ländlicher Raum
subject: Wärmepumpe
subject: Biogas
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Toroidal dipole response in a multifold double-ring metamaterial
Creators: name: Dong, Zheng-Gao
name: Ni, Peigen
name: Zhu, Jie
name: Yin, Xiaobo
name: Zhang, X.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The toroidal response is numerically investigated in a multifold double-ring metamaterials at the antibonding magnetic-dipole mode (i.e., antiparallel magnetic dipoles in one double-ring fold). This intriguing toroidal resonance in metamaterials is considered as a result of the magnetoelectric effect due to the broken balance of the electric near-field environment. We demonstrate that the toroidal dipole response in metamaterials can improve the quality factor of the resonance spectrum. In viewing of the design flexibility on the double-ring geometry, such toroidal metamaterials will offer advantages in application potentials of toroidal dipolar moment.
description: 7 pages, 4 figures
Operads of decorated cliques II: Noncrossing cliques
Creators: name: Giraudo, Samuele
Publisher: name: arXiv
Year: 2024
Subjects: subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 05C05, 05C76, 18D99, 05E99

description: A complete study of an operad $\mathrm{NC} \mathcal{M}$ of noncrossing configurations of chords introduced in previous work of the author is performed. This operad is defined on the linear span of all noncrossing $\mathcal{M}$-cliques. These are noncrossing configurations of chords with arcs labeled by a unitary magma $\mathcal{M}$. The magmatic product of $\mathcal{M}$ intervenes for the computation of the operadic composition of $\mathcal{M}$-cliques. We show that this operad is binary, quadratic, and Koszul by considering techniques coming from rewrite systems on trees. We also compute a presentation for its Koszul dual. Finally, we explain how $\mathrm{NC} \mathcal{M}$ allows one to obtain alternative constructions of already known operads like operads of formal fractions and the operad of bicolored noncrossing configurations.
description: 38 pages
Räumlich hoch aufgelöste Modellierung der Basensättigung in den Waldböden des Kantons Basel-Landschaft (Nordwestschweiz)
Creators: name: Fracek, Kristin
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Digital soil mapping
subject: knowledge-based modeling
subject: classification trees
subject: forest soil properties
subject: soil acidification
subject: base saturation
subject: non-calcareous soil depth
subject: Digitale Bodenvorhersage
subject: wissensbasierte Modellierung
subject: Entscheidungsbäume
subject: Waldbodeneigenschaften
subject: Bodenversauerung
subject: Basensättigung
subject: Entkalkungstiefe
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: [no abstract]
Hidden Ghost in Massive gravity
Creators: name: Chamseddine, Ali H.
name: Mukhanov, Viatcheslav
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Hessian's determinant for a version of massive gravity given by an infinite expansion of a square root function of the induced metric, vanishes. We show that it allows us to eliminate one of four scalar fields used to generate the graviton mass. This, however, gives rise to the appearance of extra terms in the action with the squared time derivative of the metric, thus signaling that a nonlinear ghost survives.We demonstrate this phenomenon considering a simple system with constraint, which is supposed to reduces the number of physical degrees of freedom, however, we explicitly show how the constraint forces the metric to propagate an extra tachyonic state.
description: 17 pages
Die Runenfibel von Bad Ems, Hessen-Nassau
Creators: name: Krause, Wolfgang
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2017

description: [nicht erschienen / not available]
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 19, Nr. 4 (1935)
Analyse der Füllstoffkopplung von gefüllten Elastomeren unter mechanischer Belastung
Creators: name: Geberth, Eszter
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Elastomers
subject: conductivity
subject: relaxation
subject: Elastomerkomposite
subject: Gleichstromleitfähigkeit
subject: Relaxation
subject: Dewey Decimal Classification::600 | Technik::670 | Industrielle und handwerkliche Fertigung

description: [no abstract]
title: Seabirds of Newfoundland and Labrador: Using stable isotope techniques to investigate changing trophic position over ~120 years, and examining their influence on terrestrial coastal ecosystems
Creators: name: Morrissey, Molly M.
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Seabirds breeding around Newfoundland and Labrador (NL) are facing multiple destabilizing trends in recent decades, including major fisheries collapses and increasingly erratic temperature cycling in the north-west Atlantic Ocean. Evidence suggests that these seabirds are foraging on poorer quality prey, which could have consequences for terrestrial ecosystems near seabird colonies, as seabirds are one of the major nutrient biovectors in the world. In this thesis I employ stable isotope analysis (SIA) to investigate temporal and spatial questions related to NL seabird ecology. In the first research chapter, I use stable isotopes of nitrogen (δ15N), as well as amino-acid specific stable isotopes of nitrogen (δ15NAA), as a proxy for seabird trophic level. I measured δ15N values in breast feathers of four common breeding NL seabirds (Atlantic puffin Fratercula arctica, Leach’s storm-petrel Hydrobates leucorhous, common murre Uria aalge, and razorbill Alca torda) over a period of 120+ years (1899-2021). The results indicate that Atlantic puffins, razorbills, and common murres are feeding at lower trophic levels than they were historically, while Leach’s storm-petrels’ trophic position has remained steady. In the second research chapter, I measured δ15N values in zooplankton, phytoplankton, and sediments in freshwater ponds near a large seabird community at Cape St. Mary’s Ecological Reserve (CSM), Newfoundland. Our results show that the pond nearest to the community had the highest δ15N values in zooplankton, sediment, and phytoplankton, decreasing as pond distance increased. Overall, this thesis demonstrates that 1) NL seabirds are foraging at lower trophic levels than they were historically, and 2) seabird derived nutrient inputs are incorporated into freshwater food webs near colonies. This study provides data for both researchers and managers working in seabird conservation and considers broader terrestrial implications of declines in seabird populations.
Was ist Autonomie? : Konformität und Selbstbestimmung als Funktionen gesellschaftlicher Normativität
Creators: name: Wessels, Sebastian
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Autonomy
subject: conformity
subject: normativity
subject: Autonomie
subject: Konformität
subject: Normativität
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie

description: [no abstract]
Totalsynthesen von Angiolam A und Baceridin und Studien zur enantioselektiven vinylogen Mukaiyama-Aldolreaktion
Creators: name: Gieseler, Marc Timo
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2013
Subjects: subject: Natural products
subject: vinylogous Mukaiyama aldol reaction
subject: total synthesis
subject: asymmetric protonation
subject: Stryker reagent
subject: Naturstoffe
subject: Angiolam A
subject: Baceridin
subject: vinyloge Mukaiyama-Aldolreaktion
subject: Totalsynthese
subject: asymmetrische Protonierung
subject: Stryker-Reagenz
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Multiplicative Hom-Lie superalgebra structures on infinite dimensional simple Lie superalgebras of vector fields
Creators: name: Yuan, Jixia
name: Sun, Liping
name: Liu, Wende
Publisher: name: arXiv
Year: 2013
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B40, 17B66

description: This paper considers the multiplicative Hom-Lie superalgebra structures on infinite dimensional simple Lie superalgebras of vector fields with characteristic zero. The main result is that there is only the multiplicative Hom-Lie superalgebra structure on these Lie superalgebras.
description: 9 pages
Transportspektroskopie an Quantenpunkten im Kondo-Regime
Creators: name: Heine, Alexander Wieland
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2016
Subjects: subject: Quantum dots
subject: Kondo effect
subject: quantum Hall effect
subject: Quantenpunkte
subject: Kondo-Effekt
subject: Quanten-Hall-Effekt
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]