cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diversification Return, Portfolio Rebalancing, and the Commodity Return Puzzle
Creators: name: Willenbrock, Scott
Publisher: name: arXiv
Year: 2011
Subjects: subject: Portfolio Management (q-fin.PM)
subject: FOS: Economics and business

description: Diversification return is an incremental return earned by a rebalanced portfolio of assets. The diversification return of a rebalanced portfolio is often incorrectly ascribed to a reduction in variance. We argue that the underlying source of the diversification return is the rebalancing, which forces the investor to sell assets that have appreciated in relative value and buy assets that have declined in relative value, as measured by their weights in the portfolio. In contrast, the incremental return of a buy-and-hold portfolio is driven by the fact that the assets that perform the best become a greater fraction of the portfolio. We use these results to resolve two puzzles associated with the Gorton and Rouwenhorst index of commodity futures, and thereby obtain a clear understanding of the source of the return of that index. Diversification return can be a significant source of return for any rebalanced portfolio of volatile assets.
description: 14 pages
Understanding Mechanistic Effect of Chloride-Induced Stress Corrosion Cracking Mechanism Through Multi-scale Characterization
Creators: name: Qu, Haozheng
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Metals and alloy materials

description: Stress corrosion cracking (SCC) is a longstanding critical materials challenge in austenitic stainless steels (AuSS). Recently, there has been mounting concern regarding the potential for Chloride-induced stress corrosion cracking (CISCC) along arc weld seams on austenitic stainless-steel canisters used as spent nuclear fuel (SNF) dry storage containers, due to the residual stress from the welding process and exposure to chloride-rich coastal air at storage sites. To ensure the safety of the SNF storage, fundamental understanding and mitigation methods of CISCC are critical in both engineering design and maintenance of the storage canisters before and after their deployment. With the recent development of high-resolution characterization and analysis techniques, a more robust and comprehensive understanding of the fundamental TGCISCC mechanism starts to be more accessible. In this thesis, comprehensive state-of-the-art techniques, including SEM, EBSD, HREBSD, FIB, ATEM, TKD, potential dynamic measurement, XRD, and nanoindentation will be used to further understand the mechanistic mechanism of TGCISCC in AuSS from macroscopic scale down to atomistic scale.
Some examples of quantum graphs
Creators: name: Gromada, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 20G42 (Primary), 05C25, 18M25, 18M40 (Secondary)

description: We summarize different approaches to the theory of quantum graphs and provide several ways to construct concrete examples. First, we classify all undirected quantum graphs on the quantum space $M_2$. Secondly, we apply the theory of 2-cocycle deformations to Cayley graphs of abelian groups. This defines a twisting procedure that produces a quantum graph, which is quantum isomorphic to the original one. For instance, we define the anticommutative hypercube graphs. Thirdly, we construct an example of a quantum graph, which is not quantum isomorphic to any classical graph.
description: 43 pages; added {\S}5.4, some additional minor corrections
Optical Self Energy in Graphene due to Correlations
Creators: name: Hwang, J.
name: LeBlanc, J. P. F.
name: Carbotte, J. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In highly correlated systems one can define an optical self energy in analogy to its quasiparticle (QP) self energy counterpart. This quantity provides useful information on the nature of the excitations involved in inelastic scattering processes. Here we calculate the self energy of the intraband optical transitions in graphene originating in the electron-electron interaction (EEI) as well as electron-phonon interaction (EPI). Although optics involves an average over all momenta ($k$) of the charge carriers, the structure in the optical self energy is nevertheless found to mirror mainly that of the corresponding quasiparticles for $k$ equal to or near the Fermi momentum $k_F$. Consequently plasmaronic structures which are associated with momenta near the Dirac point at $k=0$ are not important in the intraband optical response. While the structure of the electron-phonon interaction (EPI) reflects the sharp peaks of the phonon density of states, the excitation spectrum associated with the electron-electron interaction is in comparison structureless and flat and extends over an energy range which scales linearly with the value of the chemical potential. Modulations seen on the edge of the interband optical conductivity as it rises towards its universal background value are traced to structure in the quasiparticle self energies around $k_F$ of the lower Dirac cone associated with the occupied states.
description: 30 pages, 10 figures
New maximal regularity results for the heat equation in exterior domains, and applications
Creators: name: Danchin, Raphaël
name: Mucha, Piotr B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: This paper is dedicated to the proof of new maximal regularity results involving Besov spaces for the heat equation in the half-space or in bounded or exterior domains of R^n. We strive for time independent a priori estimates in regularity spaces of type L^1(0,T;X) where X stands for some homogeneous Besov space. In the case of bounded domains, the results that we get are similar to those of the whole space or of the half-space. For exterior domains, we need to use mixed Besov norms in order to get a control on the low frequencies. Those estimates are crucial for proving global-in-time results for nonlinear heat equations in a critical functional framework.
description: 28 pages
Ferromagnetic behavior of ultrathin manganese nanosheets
Creators: name: Mitra, Sreemanta
name: Mandal, Amrita
name: Datta, Anindya
name: Banerjee, Sourish
name: Chkaravorty, Dipankar
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ferromagnetic behaviour has been observed experimentally for the first time in nanostructured Manganese. Ultrathin ($\sim$ 0.6 nm) Manganese nanosheets have been synthesized inside the two dimensional channels of sol-gel derived Na-4 mica. The magnetic properties of the confined system are measured within 2K-300K temperature range. The confined structure is found to show a ferromagnetic behaviour with a nonzero coercivity value. The coercivity value remains positive throughout the entire temperature range of measurement. The experimental variation of susceptibility as a function of temperature has been satisfactorily explained on the basis of a two dimensional system with a Heisenberg Hamiltonian involving direct exchange interaction.
description: 13 pages, 9 figures
Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
Creators: name: Southworth, John
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: I calculate the physical properties of 32 transiting extrasolar planet and brown dwarf systems from existing photometric observations and measured spectroscopic parameters. The systems studied include fifteen observed by CoRoT, ten by Kepler and five by the Deep Impact spacecraft. Inclusion of the objects studied in previous papers leads to a sample of 58 transiting systems with homogeneously measured properties. The Kepler data include observations from Quarter 2, and my analyses of several of the systems are the first to be based on short-cadence data from this satellite. The light curves are modelled using the JKTEBOP code, with attention paid to the treatment of limb darkening, contaminating light, eccentricity, correlated noise, and numerical integration over long exposure times. The physical properties are derived using constraints from five sets of theoretical stellar model predictions. An alternative approach using a calibration from eclipsing binary star systems is explored and found to give comparable numbers. My results are in good agreement with published properties for most of the transiting systems, but discrepancies are identified for CoRoT-5, CoRoT-8, CoRoT-13, Kepler-5 and Kepler-7. Many of the errorbars quoted in the literature are underestimated. Refined orbital ephemerides are given for CoRoT-8 and for the Kepler planets. Asteroseismic constraints on the density of the host stars are in good agreement with the photometric equivalents for HD 17156 and TrES-2, but not for HAT-P-7 and HAT-P-11. Complete error budgets are generated for each transiting system. Whilst most would benefit from further photometry and spectroscopy, HD 17156, HD 80606, HAT-P-7 and TrES-2 are now extremely well characterised. HAT-P-11 is an exceptional candidate for studying starspots. The orbital ephemerides of some transiting systems are becoming uncertain and they should be re-observed.
description: Accepted for publication in MNRAS. 32 pages, lots of nice figures and tables. A version with high-resolution figures, or a large Appendix with detailed results, can be obtained from http://www.astro.keele.ac.uk/~jkt/pubs.html. An online catalogue of transiting planets, including a compilation of the results from this series of papers, can be found at http://www.astro.keele.ac.uk/~jkt/tepcat/
Dirac fermion optics and directed emission from single- and bilayer graphene cavities
Creators: name: Schrepfer, Jule-Katharina
name: Chen, Szu-Chao
name: Liu, Ming-Hao
name: Richter, Klaus
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-mobility graphene hosting massless charge carriers with linear dispersion provides a promising platform for electron optics phenomena. Inspired by the physics of dielectric optical micro-cavities where the photon emission characteristics can be efficiently tuned via the cavity shape, we study corresponding mechanisms for trapped Dirac fermionic resonant states in deformed micro-disk graphene billiards and directed emission from those. In such graphene devices a back-gate voltage provides an additional tunable parameter to mimic different effective refractive indices and thereby the corresponding Fresnel laws at the boundaries. Moreover, cavities based on single-layer and double-layer graphene exhibit Klein- and anti-Klein tunneling, respectively, leading to distinct differences with respect to dwell times and resulting emission profiles of the cavity states. Moreover, we find a variety of different emission characteristics depending on the position of the source where charge carriers are fed into the cavites. Combining quantum mechanical simulations with optical ray tracing and a corresponding phase-space analysis, we demonstrate strong confinement of the emitted charge carriers in the mid field of single-layer graphene systems and can relate this to a lensing effect. For bilayer graphene, trapping of the resonant states is more efficient and the emission characteristics do less depend on the source position.
description: 12 pages, 12 figures
On states of quantum theory
Creators: name: Arab, Amir R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper the generalized quantum states, i.e. positive and normalized linear functionals on $C^{*}$-algebras, are studied. Firstly, we study normal states, i.e. states which are represented by density operators, and singular states, i.e. states can not be represented by density operators. It is given an approach to the resolution of bounded linear functionals into quantum states by applying the GNS construction, i.e. the fundamental result of Gelfand, Neumark and Segal on the representation theory of $C^{*}$-algebras, and theory of projections. Secondly, it is given an application in quantum information theory. We study covariant cloners, i.e. quantum channels in the Heisenberg and the Schrödinger pictures which are covariant by shifting, and it is shown that the optimal cloners can not have a singular component. Finally, we discuss on the representation of pure states in the sense of the Gelfand-Pettis integral. We also give physical interpretations and examples in different sections of the present work.
description: 17 pages- Extended version with some changes
Two-photon physics at future electron-positron colliders
Creators: name: Boyko, I. R.
name: Bytev, V. V.
name: Zhemchugov, A. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Two photon collisions offer a variety of physics studies that can be performed at the future electron-positron colliders. Using the planned CEPC parameters as a benchmark we consider several topics to be studied in the two-photon collisions. With the full integrated luminosity the Higgs boson photoproduction can be reliably observed. A large statistics of various quarkonium states can be collected. The LEP results on the photon structure function and the tau lepton anomalous magnetic moment can be improved by 1-2 orders of magnitude.
A Kaluza-Klein inspired action for chiral p-forms and their anomalies
Creators: name: Bonetti, Federico
name: Grimm, Thomas W.
name: Hohenegger, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The dynamics of chiral p-forms can be captured by a lower-dimensional parity-violating action motivated by a Kaluza-Klein reduction on a circle. The massless modes are (p-1)-forms with standard kinetic terms and Chern-Simons couplings to the Kaluza-Klein vector of the background metric. The massive modes are p-forms charged under the Kaluza-Klein vector and admit parity-odd first-order kinetic terms. Gauge invariance is implemented by a Stueckelberg-like mechanism using (p-1)-forms. A Chern-Simons term for the Kaluza-Klein vector is generated at one loop by massive p-form modes. These findings are shown to be consistent with anomalies and supersymmetry for six-dimensional supergravity theories with chiral tensor multiplets.
description: 4 pages, 1 figure
A proposal to extract and enhance four-Majorana interactions in hybrid nanowires
Creators: name: Reza, Tasnum
name: Frolov, Sergey M.
name: Pekker, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We simulate the smallest building block of the Sachdev-Ye-Kitaev (SYK) model, a system of four interacting Majorana modes. We propose a 1D Kitaev chain that has been split into three segments, i.e., two topological segments separated by a non-topological segment in the middle, hosting four Majorana Zero Modes at the ends of the topological segments. We add a non-local interaction term to this Hamiltonian which produces both bilinear (two-body) interactions and a quartic (four-body) interaction between the Majorana modes. We further tune the parameters in the Hamiltonian to reach the regime with a finite quartic interaction strength and close to zero bilinear interaction strength, as required by the SYK model. To achieve this, we map the Hamiltonian from Majorana basis to a complex fermion basis, and extract the interaction strengths using a method of characterization of low-lying energy levels and then finding the differences in energies between odd and even parity levels. We show that the interaction strengths can be tuned using two methods - (i) an approximate method of tuning overlapping Majorana wave functions (without non-local interactions) to a zero energy point followed by addition of a non-local interaction, and (ii) a direct parameter space optimization method using a genetic algorithm. We propose that this model could be further extended to more Majorana modes, and show a 6-Majorana model as an example. Since eigenspectral characterization of one-dimensional nanowire devices can be done via tunneling spectroscopy in quantum transport measurements, this study could be performed in experiment.
description: Code available on Zenodo https://zenodo.org/communities/frolovlab/
Confirmation of stimulated Hawking radiation, but not of black hole lasing
Creators: name: Steinhauer, Jeff
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Stimulated Hawking radiation in an analogue black hole in a Bose-Einstein condensate was reported seven years ago, and it was claimed that the stimulation was of the black hole lasing variety. The study was based on observation of rapidly-growing negative-energy waves. We find that the Hawking particles are directly observable in the experimental plots, which confirms the stimulated Hawking radiation. We further verify this result with new measurements. Also, the observed Hawking particles provide a sensitive, background-free probe of the underlying mechanism of the stimulation. The experiment inspired the prediction of the Bogoliubov-Cherenkov-Landau (BCL) mechanism of stimulated Hawking radiation. By computing the Bogoliubov coefficient for Hawking radiation, we find that the stimulation was of the BCL type, rather than black-hole lasing. We further confirm the results with numerical simulations of both black hole lasing and BCL stimulation.
An FPGA-Based Fully Pipelined Bilateral Grid for Real-Time Image Denoising
Creators: name: Hashimoto, Nobuho
name: Takamaeda-Yamazaki, Shinya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: The bilateral filter (BF) is widely used in image processing because it can perform denoising while preserving edges. It has disadvantages in that it is nonlinear, and its computational complexity and hardware resources are directly proportional to its window size. Thus far, several approximation methods and hardware implementations have been proposed to solve these problems. However, processing large-scale and high-resolution images in real time under severe hardware resource constraints remains a challenge. This paper proposes a real-time image denoising system that uses an FPGA based on the bilateral grid (BG). In the BG, a 2D image consisting of x- and y-axes is projected onto a 3D space called a "grid," which consists of axes that correlate to the x-component, y-component, and intensity value of the input image. This grid is then blurred using the Gaussian filter, and the output image is generated by interpolating the grid. Although it is possible to change the window size in the BF, it is impossible to change it on the input image in the BG. This makes it difficult to associate the BG with the BF and to obtain the property of suppressing the increase in hardware resources when the window radius is enlarged. This study demonstrates that a BG with a variable-sized window can be realized by introducing the window radius parameter wherein the window radius on the grid is always 1. We then implement this BG on an FPGA in a fully pipelined manner. Further, we verify that our design suppresses the increase in hardware resources even when the window size is enlarged and outperforms the existing designs in terms of computation speed and hardware resources.
description: 7 pages, 12 figures, 2 tables, FPL 2021 (Full paper), Program and Abstract: https://whova.com/embedded/session/kScht29Q8lAG98UvGiEh7UVYTNeJssTMevISW%407S-oU%3D/1837318/, Slides: https://speakerdeck.com/hashi0203/an-fpga-based-fully-pipelined-bilateral-grid-for-real-time-image-denoising-fpl-2021, Movie: https://youtu.be/q5lxi7N-uX8, Profile: https://n-hassy.info
Fokker-Planck equation on metric graphs
Creators: name: Matrasulov, Jasur
name: Sabirov, Karimjon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the Fokker-Planck equation on metric graphs. Vertex boundary conditions are imposed in the form of weight continuity and the probability current conservation. Exact solution of the is obtained for star, tree and loop graphs. Applications of the model to Brownian motion in networks and other problems are briefly discussed.
Thermodynamics of a stochastic twin elevator
Creators: name: Kumar, Niraj
name: Broeck, Christian Van den
name: Esposito, Massimiliano
name: Lindenberg, Katja
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the non-equilibrium thermodynamics of a single particle with two available energy levels, in contact with a classical (Maxwell-Boltzmann) or quantum (Bose-Einstein) heat bath. The particle can undergo transitions between the levels via thermal activation or deactivation. The energy levels are alternately raised at a given rate regardless of occupation by the particle, maintaining a fixed energy gap equal to epsilon between them. We explicitly calculate the work, heat and entropy production rates. The efficiency in both the classical and the quantum case goes to a limit between 100% and 50% that depends on the relative rates of particle transitions and level elevation. In the classical problem we explicitly find the large deviation functions for heat, work, and internal energy.
Kinder mit Lese-Rechtschreibstörung in der Psychomotoriktherapie. Ist-Stand-Analyse und mögliche Förderideen für Kinder im Alter von fünf bis neun Jahren
Creators: name: Hangartner, Patrizia
name: Baltisser, Stefanie
Publisher: name: Zenodo
Year: 2023
Subjects: Psychomotorik
Psychomotoriktherapie
Lese-Rechtschreibstörung
Förderideen
Bachelorarbeit

description: Die vorliegende Bachelorarbeit untersucht im ersten Teil mittels einer Umfrage den aktuellen Wissensstand von zurzeit berufstätigen Psychomotoriktherapeut:innen bezüglich der Arbeit mit Kindern mit Lese-Rechtschreibstörungen. Die durchgeführte Umfrage wurde anschliessend gemäss Methode der qualitativen Inhaltsanalyse ausgewertet und die Ergebnisse deskriptiv dargestellt. Für den zweiten Teil dieser Arbeit wurden aus den Umfrageergebnissen sowie aus zusätzlicher Fachliteratur und persönlichen Erfahrungen der Autorinnen, Förderideen für die Arbeit als Psychomotoriktherapeut:in abgeleitet. Der Fokus der Förderideen wurde dabei auf den Bereich des Buchstabenerwerbs sowie auf die Beeinflussung des Selbstvertrauens gelegt. Aufgrund der zeitlichen Begrenzung dieser Arbeit verzichteten die Autorinnen auf die Erprobung und Evaluation der Förderideen.
Sporen der Älteren Merowingerzeit
Creators: name: Rettner, Arno
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2020

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 75 Nr. 1 (1997)
Tschavdar Kirilov, Die Stadt des Frühmittelalters in Ost und West
Creators: name: Steuer, Heiko
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2020

description: Rezension zu: Tschavdar Kirilov, Die Stadt des Frühmittelalters in Ost und West. Archäologische Befunde Mitteleuropas im Vergleich zur östlichen Balkanhalbinsel. Studien zur Archäologie Europas, Band 3. Verlag Dr. Rudolf Habelt GmbH, Bonn 2006. ISBN 978-3-7749-3451-1. 226 Seiten und 65 Abbildungen
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 87 Nr. 2 2009(2012)
Simple extensions of reflection subgroups of primitive complex reflection groups
Creators: name: Taylor, D. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F55

description: If $G$ is a finite primitive complex reflection group, all reflection subgroups of $G$ and their inclusions are determined up to conjugacy. As a consequence, it is shown that if the rank of $G$ is $n$ and if $G$ can be generated by $n$ reflections, then for every set $R$ of $n$ reflections which generate $G$, every subset of $R$ generates a parabolic subgroup of $G$.
description: 17 pages, 20 tables
Evidence for mild deviation from power-law distribution of electrons in relativistic shocks: GRB 090902B
Creators: name: Duran, Rodolfo Barniol
name: Kumar, Pawan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Many previous studies have determined that the long lasting emission at X-ray, optical and radio wavelengths from gamma-ray bursts (GRBs), called the afterglow, is likely produced by the external forward shock model. In this model, the GRB jet interacts with the circum-stellar medium and drives a shock that heats the medium, which radiates via synchrotron emission. In this work, we carried out a detailed analysis of the late time afterglow data of GRB 090902B using a very careful accounting of the Inverse Compton losses. We find that in the context of the external forward shock model, the only viable option to explain the X-ray and optical data of GRB 090920B is to have the electron energy distribution deviate from a power-law shape and exhibit some slight curvature immediately downstream of the shock front (we explored other models that rely on a single power-law assumption, but they all fail to explain the observations). We find the fraction of the energy of shocked plasma in magnetic field to be ~10^{-6} using late time afterglow data, which is consistent with the value obtained using early gamma-ray data. Studies like the present one might be able to provide a link between GRB afterglow modeling and numerical simulations of particle acceleration in collisionless shocks. We also provide detailed calculations for the early (< 10^3 s) high energy (> 100 MeV) emission and confirm that it is consistent with origin in the external forward shock. We investigated the possibility that the ~10 keV excess observed in the spectrum during the prompt phase also has its origin in the external shock and found the answer to be negative.
description: 17 pages, 6 figures, accepted for publication in MNRAS
On the Possibility of an Artificial Origin for `Oumuamua
Creators: name: Loeb, Abraham
Publisher: name: arXiv
Year: 2021
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The first large interstellar object discovered near Earth, `Oumuamua, showed half a dozen anomalies relative to comets or asteroids in the Solar system. All natural-origin interpretations of the Oumuamua anomalies contemplated objects of a type never-seen-before, such as: a porous cloud of dust particles, a tidal disruption fragment or exotic icebergs made of pure hydrogen or pure nitrogen. Each of these natural-origin models has major quantitative shortcomings, and so the possibility of an artificial origin for `Oumuamua must be considered. The Galileo Project aims to collect new data that will identify the nature of `Oumuamua-like objects in the coming years.
description: 17 pages, 8 figures, accepted for publication as a review paper in the journal Astrobiology
Data for "The impacts of a weakened Atlantic Meridional Overturning Circulation on ENSO in a warmer climate"
Creators: name: Liu, Wei
name: Duarte Cavalcante Pinto, David
name: Fedorov, Alexey
name: Zhu, Jiang
Publisher: name: Zenodo
Year: 2023

description: Data and code to generate Figures 1-4.
Kolmogorov turbulence, Anderson localization and KAM integrability
Creators: name: Shepelyansky, D. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The conditions for emergence of Kolmogorov turbulence, and related weak wave turbulence, in finite size systems are analyzed by analytical methods and numerical simulations of simple models. The analogy between Kolmogorov energy flow from large to small spacial scales and conductivity in disordered solid state systems is proposed. It is argued that the Anderson localization can stop such an energy flow. The effects of nonlinear wave interactions on such a localization are analyzed. The results obtained for finite size system models show the existence of an effective chaos border between the Kolmogorov-Arnold-Moser (KAM) integrability at weak nonlinearity, when energy does not flow to small scales, and developed chaos regime emerging above this border with the Kolmogorov turbulent energy flow from large to small scales.
description: 8 pages, 6 figs, EPJB styles
Quantum algorithm for persistent Betti numbers and topological data analysis
Creators: name: Hayakawa, Ryu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Topological data analysis (TDA) is an emergent field of data analysis. The critical step of TDA is computing the persistent Betti numbers. Existing classical algorithms for TDA are limited if we want to learn from high-dimensional topological features because the number of high-dimensional simplices grows exponentially in the size of the data. In the context of quantum computation, it has been previously shown that there exists an efficient quantum algorithm for estimating the Betti numbers even in high dimensions. However, the Betti numbers are less general than the persistent Betti numbers, and there have been no quantum algorithms that can estimate the persistent Betti numbers of arbitrary dimensions. This paper shows the first quantum algorithm that can estimate the (normalized) persistent Betti numbers of arbitrary dimensions. Our algorithm is efficient for simplicial complexes such as the Vietoris-Rips complex and demonstrates exponential speedup over the known classical algorithms.
description: 27 pages; Accepted in Quantum
Shubnikov-de Haas oscillations in GaAs quantum wells in tilted magnetic fields
Creators: name: Hatke, A. T.
name: Zudov, M. A.
name: Pfeiffer, L. N.
name: West, K. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report on quantum magneto-oscillations in an ultra-high mobility GaAs/AlGaAs quantum well at very high tilt angles. Unlike previous studies, we find that the spin and cyclotron splittings become equal over a continuous range of angles, but only near certain, angle-dependent filling factors. At high enough tilt angles, Shubnikov-de Haas oscillations reveal a prominent beating pattern, indicative of consecutive level crossings, all occurring at the same angle. We explain these unusual observations by an in-plane field-induced increase of the carrier mass, which leads to accelerated, filling factor-driven crossings of spin sublevels in tilted magnetic fields.
Cramér-Rao Bounds for Holographic Positioning
Creators: name: D'Amico, Antonio A.
name: Torres, Andrea de Jesus
name: Sanguinetti, Luca
name: Win, Moe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Multiple antennas arrays play a key role in wireless networks for communications but also for localization and sensing applications. The use of large antenna arrays at high carrier frequencies (in the mmWave range) pushes towards a propagation regime in which the wavefront is no longer plane but spherical. This allows to infer the position and orientation of a transmitting source from the received signal without the need of using multiple anchor nodes, located in known positions. To understand the fundamental limits of large antenna arrays for localization, this paper combines wave propagation theory with estimation theory, and computes the Cramér-Rao Bound (CRB) for the estimation of the source position on the basis of the three Cartesian components of the electric field, observed over a rectangular surface area. The problem is referred to as holographic positioning and is formulated by taking into account the radiation angular pattern of the transmitting source, which is typically ignored in standard signal processing models. We assume that the source is a Hertzian dipole, and address the holographic positioning problem in both cases, that is, with and without a priori knowledge of its orientation. To simplify the analysis and gain further insights, we also consider the case in which the dipole is located on the line perpendicular to the surface center. Numerical and asymptotic results are given to quantify the CRBs, and to quantify the effect of various system parameters on the ultimate estimation accuracy. It turns out that surfaces of practical size may guarantee a centimeter-level accuracy in the mmWave bands.
description: 15 pages, 9 figures, IEEE Transactions on Signal Processing
§ 2 Die Finanzgerichtsbarkeit und ihre verfassungsrechtliche Verankerung
Creators: name: Herrmann, Nicole
Publisher: name: Heidelberger Beiträge zum Finanz- und Steuerrecht
Year: 2020

description: Heidelberger Beiträge zum Finanz- und Steuerrecht, Bd. 13 (2019): Geprägte Freiheit 2019/20
Biocatalytic oxyfunctionalisation of Butane in bubble column reactors
Creators: name: Perz, Sven Frederic
Publisher: name: TUHH Universitätsbibliothek
Year: 2022
Subjects: subject: Butane Oxidation
subject: Bubble column reactor
subject: AlkBGT Monooxygenase
subject: UPO
subject: Biotransformation
classificationCode: 570
subject: Biowissenschaften, Biologie
classificationCode: 600
subject: Technik

description: In der organischen Chemie ist die selektive Funktionalisierung von C-H Bindungen eine der „Dream reactions“. In dieser Arbeit wurde drei biokatalytische System zur Oxyfunktio-nalisierung von Butan in Blasensäulenreaktoren (0.2 L und 2 L) untersucht. (1) Für die ganzzell-katalysierte Oxidation von Butan zu Buttersäure wurde die Alkan 1-monooxygenase (AlkBGT) heterolog in E. coli exprimiert. (2) Ein verbesserter Stamm wurde hinsichtlich seiner Eignung zur Kultivierung auf Butan, bzw. dessen Derivate 1-Butanol und Buttersäure, als einzige Kohlenstoffquelle untersucht. (3) Der Einsatz von unspezifische Peroxygenase (UPO), als freies Enzym, zur selektiven Hydroxylierung von Butan zu 2 Butanol wurde erstmal im präoperativen Maßstab demonstriert.
description: The selective oxyfunctionalisation of unactivated C-H bonds is considered to be a “dream reaction” in organic chemistry. In this study three biocatalytic systems for the oxyfunctionalisation of butane are investigated in a 0.2 L and 2 L bubble column reactor. (1) In a whole cell (E. coli) the heterologously expressed membrane bound alkane 1-monooxygenase (AlkBGT system) is applied to oxidise butane to butyric acid. (2) An improved strain is examined regarding its potential to metabolise butane and its derivatives, 1-butanol and butyric acid, as sole carbon source. (3) Unspecific peroxygenase (UPO) is applied as a free enzyme for the selective hydroxylation of butane to 2-butanol outside of analytical scale.
§ 15 25 Jahre wehrverfassungsrechtlicher Parlamentsvorbehalt
Creators: name: Groß, Johanna
Publisher: name: Heidelberger Beiträge zum Finanz- und Steuerrecht
Year: 2020

description: Heidelberger Beiträge zum Finanz- und Steuerrecht, Bd. 13 (2019): Geprägte Freiheit 2019/20
Lattice Packings of Cross-polytopes from Reed-Solomon Codes and Sidon Sets
Creators: name: Kovačević, Mladen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Information Theory (cs.IT)
subject: Metric Geometry (math.MG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 11H31, 52C17, 05B40, 11B83, 11H71, 11T71

description: Two constructions of lattice packings of $ n $-dimensional cross-polytopes ($ \ell_1 $ balls) are described, the density of which exceeds that of any prior construction by a factor of at least $ 2^{\frac{n}{\ln n}(1 + o(1))} $ when $ n \to \infty $. The first family of lattices is explicit and is obtained by applying Construction A to a class of Reed-Solomon codes. The second family has subexponential construction complexity and is based on the notion of Sidon sets in finite Abelian groups. The construction based on Sidon sets also gives the highest known asymptotic density of packing discrete cross-polytopes of fixed radius $ r \geqslant 3 $ in $ \mathbb{Z}^n $.
description: 7 pages. v2: Section 2 and the discussion after the proof of Theorem 3.1 are added, v3: minor changes. To appear in the Bulletin of the London Mathematical Society
Zur Frage byzantinischer Blankwaffen im ausgehenden 6. und 7. Jahrhundert: Schwerter mit bronzenem Parierstück vom Typ Aradac-Kölked-Korinth
Creators: name: Eger, Christoph
Publisher: name: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz
Year: 2020

description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 61 Nr. 1 (2014)
The Biological Big Bang: The First Oceans of Primordial Planets at 2-8 Million Years Explain Hoyle/Wickramasinghe Cometary Panspermia
Creators: name: Gibson, Carl H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Hydrogravitional-dynamics (HGD) cosmology of Gibson/Schild 1996 predicts that the primordial H-He^4 gas of big bang nucleosynthesis became proto-globular-star-cluster clumps of Earth-mass planets at 300 Kyr. The first stars formed from mergers of these 3000 K gas planets. Chemicals C, N, O, Fe etc. created by stars and supernovae then seeded many of the reducing hydrogen gas planets with oxides to give them hot water oceans with metallic iron-nickel cores. Water oceans at critical temperature 647 K then hosted the first organic chemistry and the first life, distributed to the 10^80 planets of the cosmological big bang by comets produced by the new (HGD) planet-merger star formation mechanism. The biological big bang scenario occurs between 2 Myr when liquid oceans condensed and 8 Myr when they froze. HGD cosmology explains, very naturally, the Hoyle/Wickramasinghe concept of cometary panspermia by giving a vast, hot, nourishing, cosmological primordial soup for abiogenesis, and the means for transmitting the resulting life forms and their evolving chemical mechanisms widely throughout the universe. A primordial astrophysical basis is provided for astrobiology by HGD cosmology. Concordance ΛCDMHC cosmology is rendered obsolete by the observation of complex life on Earth.
description: 19 pages 15 figures SPIE Conference on Astrobiology 8152 Aug. 25, 2011, invited paper 8152-37
Search for an alien communication from the Solar System to a neighbor star
Creators: name: Gillon, Michael
name: Burdanov, Artem
name: Wright, Jason T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Under the hypothesis that self-reproducing probes have formed a galactic-scale communication network by direct Gravitationally-Lensed (GL) links between neighboring systems, we identify Wolf 359, the third nearest stellar system, as an excellent target for a search for alien interstellar communication emitted from our Solar System. Indeed, the Earth is a transiting planet as seen from Wolf 359, meaning that our planet could pass in an alien communication beam once per orbit. We present a first attempt to detect optical messages emitted from the Solar System to this star, based on observations gathered by the TRAPPIST-South and SPECULOOS-South robotic telescopes. While sensitive enough to detect constant emission with emitting power as small as 1W, this search led to a null result. We note that the GL-based interstellar communication method does not necessarily require to emit from the so-called "Solar Gravitational Line" (SGL), starting at ~550 au from the Sun, and that the probe(s) could be located closer to the Sun and off-center relative to the SGL, at the cost of a smaller but still significant gain compared to a non-GL-boosted communication strategy. Basing on this consideration, we searched in our data for a moving object whose motion would be consistent with the one of the hypothesized alien transmitter, assuming it to use a solar sail to maintain its distance to the Sun. We could not reliably identify any such object up to magnitude ~23.5, which corresponds to an explored zone extending as far as Uranus' orbit (20 au).
description: Submitted to MNRAS. Comments welcome. This third version elaborates on the possibility of out-of-focus FICDs
Verzeichnisse [Bd. 21, H. 1-12 / 1968]
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 21 (1968): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
The New Astronomical Frontier of Interstellar Objects
Creators: name: Siraj, Amir
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The upcoming commencement of the Vera C. Rubin Observatory's Legacy Survey of Space of Time (LSST) will greatly enhance the discovery rate of interstellar objects (ISOs). `Oumuamua and Borisov were the first two ISOs confirmed in the Solar system, although the first interstellar meteor may have been discovered earlier. We discuss the properties of `Oumuamua and Borisov and explore the expected abundance of ISOs as a function of size in the solar neighborhood. We compare the expected abundance of ISOs to that of objects in the Oort cloud, and draw conclusions about the mass budget per star that is required to produce ISOs. We also investigate the possibility of ISOs being captured into bound orbits within the solar system, both from its birth star cluster and in the field. We examine the potential for ISOs to transport prebiotic or biotic material between planetary systems. We consider signatures of ISOs colliding with the Earth, the Moon, and neutron stars, as well as the possibility of differentiating ISOs from solar system objects in stellar occultation surveys. Finally, we discuss advantages that the imminent advent of LSST will afford the field of ISO studies, including large-number statistics that will reveal the origins of ISOs and discoveries of rare ISOs providing insights into exotic phenomena. One of the two branches of the newly established Galileo Project seeks to learn more about the nature of ISOs like `Oumuamua by performing new searches and designing follow-up observations.
description: 29 pages, 10 figures; invited review for the journal Astrobiology
ACT Modular Questionnaire Framework - Suppl. D1.1
Creators: name: Müller, Jörg
name: Aldercotte, Amanda
name: Palmen, Rachel
Publisher: name: Zenodo
Year: 2019
Subjects: Gender Equality
Communities of Practice
Gender Equality Plan
Monitoring
Evaluation

description: Please note: this document is replaced by a newer version available here: https://doi.org/10.5281/zenodo.3476725 As part of Task 2.1, the ACT project will develop a comprehensive, transferable, transnational, modular Gender Equality Audit and Monitoring tool. In many cases, GEP implementation by different institutions has been conducted in isolation from others, and with processes that differ widely in terms of their scope and effectiveness, and in majority of cases without a proper assessment of gender equality needs and priorities, or the necessary monitoring and evaluation mechanisms. For example, to the degree that questionnaires for initial institutional assessment have been published by past gender equality projects such as GENDER-NET, EGERA, or INTEGER, these questionnaires vary substantially in length, topics treated, and measurements scales used. Results usually do not transcend the immediate project context while quality assessment of the reliability and validity of the generated data has not been conducted. While sensitivity to local (national, regional and organizational) context is key for a successful GEP implementation, a lack of more standardized assessment tools hinder mutual learning. Mutual learning, however is conditioned on the possibility to compare related gender equality measures with their resulting impacts in a meaningful and systematic way. ACT will provide an online, adaptable questionnaire framework that produces comparable data and thus facilitates knowledge sharing benchmarking and dialogue across national- and organizational contexts. The aim of the current document is to provide a catalog of potentially useful measurement scales for the ACT modular Gender Equality Audit and Monitoring tool. As such it provides an overview of interesting scales and their usage in the literature that should not be taken as a definitive list of which scales will be available in the final online tool.
The Hadwiger theorem on convex functions, III: Steiner formulas and mixed Monge-Ampère measures
Creators: name: Colesanti, Andrea
name: Ludwig, Monika
name: Mussnig, Fabian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52B45 (Primary) 26B25, 49Q20, 52A41, 52A39 (Secondary)

description: A complete family of functional Steiner formulas is established. As applications, an explicit representation of functional intrinsic volumes using special mixed Monge-Ampère measures and a new version of the Hadwiger theorem on convex functions are obtained.
Disegni di Giacomo Quarenghi
Creators: name: Fischer, Manfred Frithjof
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 21 Nr. 2 (1968): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Erklärung des Verbandsvorstandes und des Referenten zum Vortrag von Martin Warnke, Weltanschauliche Motive in der kunstgeschichtlichen Populärliteratur
Creators: name: Buddensieg, Tilmann
name: Winner, Matthias
name: Simson, Otto Von
name: Bock, Henning
name: Beseler, Hartwig
name: Warnke, Martin
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 23 Nr. 10 (1970): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege