cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slow and fast collective neutrino oscillations: Invariants and reciprocity
Creators: name: Fiorillo, Damiano F. G.
name: Raffelt, Georg G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The flavor evolution of a neutrino gas can show ''slow'' or ''fast'' collective motion. In terms of the usual Bloch vectors to describe the mean-field density matrices of a homogeneous neutrino gas, the slow two-flavor equations of motion (EOMs) are $\dot{\mathbf{P}}_ω=(ω\mathbf{B}+μ\mathbf{P})\times\mathbf{P}_ω$, where $ω=Δm^2/2E$, $μ=\sqrt{2} G_{\mathrm{F}} (n_ν+n_{\barν})$, $\mathbf{B}$ is a unit vector in the mass direction in flavor space, and $\mathbf{P}=\int dω\,\mathbf{P}_ω$. For an axisymmetric angle distribution, the fast EOMs are $\dot{\mathbf{D}}_v=μ(\mathbf{D}_0-v\mathbf{D}_1)\times\mathbf{D}_v$, where $\mathbf{D}_v$ is the Bloch vector for lepton number, $v=\cosθ$ is the velocity along the symmetry axis, $\mathbf{D}_0=\int dv\,\mathbf{D}_v$, and $\mathbf{D}_1=\int dv\,v\mathbf{D}_v$. We discuss similarities and differences between these generic cases. Both systems can have pendulum-like instabilities (soliton solutions), both have similar Gaudin invariants, and both are integrable in the classical and quantum case. Describing fast oscillations in a frame comoving with $\mathbf{D}_1$ (which itself may execute pendulum-like motions) leads to transformed EOMs that are equivalent to an abstract slow system. These conclusions carry over to three flavors.
description: 16 pages; typo below Eq. (5) and in Eq. (47) corrected
Quantum information entropy of heavy mesons in the presence of a point-like defect
Creators: name: Almeida, C. A. S.
name: Edet, C. O.
name: Lima, F. C. E.
name: Ali, N.
name: Asjad, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using Schrödinger's formalism, we investigate the quantum eigenstates of the heavy mesons trapped by a point-like defect and by Cornell's potential. One implements this defect to the model considering a spherical metric profile coupled to it. Furthermore, the Nikiforov-Uvarov method is applied to theory to study the quantum eigenstates of the heavy mesons. To calculate the quantum information entropy (QIE), one considers the wave functions that describe the charmonium and bottomonium states. To explore the QIE, we use the well-known Shannon's entropy formulated at the position and reciprocal space. The analysis of the QIE gives us relevant information about how the quantum information change with the variation of the point-like defect. Consequently, considering the Bialynicki-Birula and Mycielski (BBM) relation, we show how this defect influences the quarkonium position and momentum uncertainty measures.
description: 15 pages, 2 figures, 1 table
title: Extreme, Positive Geomorphic Change in a Historically Degraded Desert River: Implications for Imperiled Fishes
Creators: name: Remiszewski, Tansy T.
Publisher: name: Utah State University
Year: 2022

description: Rivers comprise some of the most unique and biodiverse ecosystems on the planet with their waters supporting both human societies as well as the organisms that make these rivers their home. Large rivers like the Colorado are often highly regulated and diverted in order to support human residence in arid regions like the desert Southwest, and these water diversions often have dramatic, negative impacts on the natural flow regime of the river. These impacts leave large reaches of the river dry, reduce the river’s capacity to transport sediment, cause channel and habitat homogenization, and significantly reduce the amount of suitable habitat available to aquatic organisms. A reduction in critical habitat has, in particular, led to the population reduction, localized extinction and federal listing of many native fish species. The San Rafael River in southcentral Utah is a highly-degraded tributary of the Upper Colorado River Basin, and has historically provided critical spawning, rearing and resting habitat for native and endemic fish species. A 2010 flooding event caused an otherwise narrow, homogenous and degraded reach of the San Rafael to change into a wide, diverse, multi-threaded river system and wetland complex. We used drone-collected and historic imagery to collect data on how this event has impacted habitat complexity and resilience. We also tracked the movements and habitat usage of tagged, critically endangered bonytail (Gila elegans). Our findings have shown that the wash reach of river has become substantially more diverse than any other reach along the lower 64 km of the San Rafael River. Additionally, the wash reach of river has provided resilience in the face of seasonal drying, retaining water for periods longer than expected during summer months. Our findings also suggest native, endangered bonytail prefer and favorably utilize the complex habitat that is a direct result of the affected reach of river. We conclude that process-based desert river restoration is crucial to the persistence of many unique, endemic and native Southwestern fishes, and that large-scale disturbances like the one that has occurred in the San Rafael may be a key method for restoring these highly-degraded desert tributary systems.
The Statistics of Radio Astronomical Polarimetry: Disjoint, Superposed, and Composite Samples
Creators: name: van Straten, Willem
name: Tiburzi, Caterina
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A statistical framework is presented for the study of the orthogonally polarized modes of radio pulsar emission via the covariances between the Stokes parameters. To accommodate the typically heavy-tailed distributions of single-pulse radio flux density, the fourth-order joint cumulants of the electric field are used to describe the superposition of modes with arbitrary probability distributions. The framework is used to consider the distinction between superposed and disjoint modes with particular attention to the effects of integration over finite samples. If the interval over which the polarization state is estimated is longer than the timescale for switching between two or more disjoint modes of emission, then the modes are unresolved by the instrument. The resulting composite sample mean exhibits properties that have been attributed to mode superposition, such as depolarization. Because the distinction between disjoint modes and a composite sample of unresolved disjoint modes depends on the temporal resolution of the observing instrumentation, the arguments in favour of superposed modes of pulsar emission are revisited and observational evidence for disjoint modes is described. In principle, the four-dimensional covariance matrix that describes the distribution of sample mean Stokes parameters can be used to distinguish between disjoint modes, superposed modes, and a composite sample of unresolved disjoint modes. More comprehensive and conclusive interpretation of the covariance matrix requires more detailed consideration of various relevant phenomena, including temporally correlated subpulse modulation (e.g. jitter), statistical dependence between modes (e.g. covariant intensities and partial coherence), and multipath propagation effects (e.g. scintillation and scattering). Unpublished supplementary material is appended after the bibliography.
description: 22 pages, 3 figures, includes supplementary material that was not submitted to The Astrophysical Journal and has not been peer reviewed
Probabilistic Point Cloud Modeling via Self-Organizing Gaussian Mixture Models
Creators: name: Goel, Kshitij
name: Michael, Nathan
name: Tabib, Wennie
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Graphics (cs.GR)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This letter presents a continuous probabilistic modeling methodology for spatial point cloud data using finite Gaussian Mixture Models (GMMs) where the number of components are adapted based on the scene complexity. Few hierarchical and adaptive methods have been proposed to address the challenge of balancing model fidelity with size. Instead, state-of-the-art mapping approaches require tuning parameters for specific use cases, but do not generalize across diverse environments. To address this gap, we utilize a self-organizing principle from information-theoretic learning to automatically adapt the complexity of the GMM model based on the relevant information in the sensor data. The approach is evaluated against existing point cloud modeling techniques on real-world data with varying degrees of scene complexity.
description: 8 pages, 6 figures, to appear in IEEE Robotics and Automation Letters
title: Modeling and Control of Battery Management Systems with High-Frequency AC Link Coupled Multiport Series Resonant Converters for 2nd Life Battery Applications
Creators: name: Maughan, Brooks Jace
Publisher: name: Utah State University
Year: 2022

description: While the use and production of Electric Vehicles becomes more prevalent, it is also important to make this economical and ensure the reduction of a carbon footprint. Second-life batteries can satisfy both problems as batteries can be used in a second-life application for lower power purposes such as supplementing the grid so the infrastructure needed to charge the expanding fleet of Electric Vehicles can be easily supplied. This thesis goes through the process of Active Cell Balancing which will produce equal capacities, or similar batteries, that can be more efficiently used in these and other types of second-life applications. The process is expanded through series connection of the converters and modules of batteries so the process can be used for up to 96 Nissan Cells at a time. This project at Utah State University will also entail the removal and replacement of these Nissan battery cells while running to ensure quick but smooth balancing of hundreds of batteries.
title: Event-Based Obstacle Detection with Commercial Lidar
Creators: name: Cornwall, Chaz
Publisher: name: Utah State University
Year: 2022

description: Computerized obstacle detection for moving vehicles is becoming more important as vehicle manufacturers make their systems more autonomous and safe. However, obstacle detection must operate quickly in dynamic environments such as driving at highway speeds. A unique obstacle detection system using 3D changes in the environment is proposed. Furthermore, these 3D changes are shown to contain sufficient information for avoiding obstacles. To make the system easy to integrate onto a vehicle, additional processing is implemented to remove unnecessary dependencies. This system provides a method for obstacle detection that breaks away from typical systems to be more efficient.
Interplay of correlations and Majorana mode from local solution perspective
Creators: name: Barański, Jan
name: Barańska, Magdalena
name: Zienkiewicz, Tomasz
name: Domański, Tadeusz
Publisher: name: arXiv
Year: 2025
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the quasiparticle spectrum of a hybrid system, comprising a correlated (Anderson-type) quantum dot coupled to a topological superconducting nanowire hosting the Majorana boundarymodes. From the exact solution of the low-energy effective Hamiltonian, we uncover a subtle interplay between Coulomb repulsion and the Majorana mode. Our analytical expressions show that the spectral weight of the leaking Majorana mode is sensitive to both the quantum dot energy level and the repulsive potential. We compare our results with estimations by L.S. Ricco et al. Phys. Rev. B 99, 155159 (2019) obtained for the same hybrid structure using the Hubbard-type decoupling scheme, and analytically quantify the spectral weight of the zero-energy (topological) mode coexisting with the finite-energy (trivial) states of the quantum dot. We also show that empirical verification of these spectral weights could be feasible through spin-polarized Andreev spectroscopy.
Amendment to "Replication of a Research Claim from Pennycook et al. (2020) from PsyArXiv"
Creators: name: Freeman, Alexandra
name: Linden, Sander van der
name: Roozenbeek, Jon
name: Dryhurst, Sarah
name: Schneider, Claudia
name: Kerr, John
name: Sutherland, Holly
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: This is an amendment to the existing registration for "Replication of a Research Claim from Pennycook et al. (2020) from PsyArXiv." (Freeman, et al., 2020) in order to clarify ambiguity regarding the analysis plan.
Childrearing interventions for parents and caregivers via mobile applications to support the development of children (age 0-5): a scoping review
Creators: name: Ekambareshwar, Mahalakshmi
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences
subject: Child development; digital technology; global health; mobile app; smartphone; review

description: The objective of this scoping review is to explore the evidence in relation to interventions delivered to parents/caregivers via mobile applications to support the social and emotional development of very young children.
37 GHz observations of narrow-line Seyfert 1 galaxies
Creators: name: Lähteenmäki, A.
name: Järvelä, E.
name: Hovatta, T.
name: Tornikoski, M.
name: Harrison, D. L.
name: López-Caniego, M.
name: Max-Moerbeck, W.
name: Mingaliev, M.
name: Pearson, T. J.
name: Ramakrishnan, V.
name: Readhead, A. C. S.
name: Reeves, R. A.
name: Richards, J. L.
name: Sotnikova, Y.
name: Tammi, J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations at 37 GHz, performed at Metsähovi Radio Observatory, are presented for a sample of 78 radio-loud and radio-quiet narrow-line Seyfert 1 (NLS1) galaxies, together with additional lower and higher frequency radio data from RATAN-600, Owens Valley Radio Observatory, and the Planck satellite. Most of the data have been gathered between February 2012 and April 2015 but for some sources even longer lightcurves exist. The detection rate at 37 GHz is around 19%, comparable to other populations of active galactic nuclei presumed to be faint at radio frequencies, such as BL Lac objects. Variability and spectral indices are determined for sources with enough detections. Based on the radio data, many NLS1 galaxies show a blazar-like radio spectra exhibiting significant variability. The spectra at a given time are often inverted or convex. The source of the high-frequency radio emission in NLS1 galaxies, detected at 37 GHz, is most probably a relativistic jet rather than star formation. Jets in NLS1 galaxies are therefore expected to be a much more common phenomenon than earlier assumed.
description: Accepted for publication in A&A. Table of 37 GHz data will be available at the CDS soon
Tailoring the SiC surface - a morphology study on the epitaxial growth of graphene and its buffer layer
Creators: name: Kruskopf, Mattias
name: Pierz, Klaus
name: Pakdehi, Davood Momeni
name: Wundrack, Stefan
name: Stosch, Rainer
name: Bakin, Andrey
name: Schumacher, Hans W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the growth of the graphene buffer layer and the involved step bunching behavior of the silicon carbide substrate surface using atomic force microscopy. The formation of local buffer layer domains are identified to be the origin of undesirably high step edges in excellent agreement with the predictions of a general model of step dynamics. The applied polymer-assisted sublimation growth method demonstrates that the key principle to suppress this behavior is the uniform nucleation of the buffer layer. In this way, the silicon carbide surface is stabilized such that ultra-flat surfaces can be conserved during graphene growth on a large variety of silicon carbide substrate surfaces. The analysis of the experimental results describes different growth modes which extend the current understanding of epitaxial graphene growth by emphasizing the importance of buffer layer nucleation and critical mass transport processes.
description: 18 pages, 10 figures edited type setting and acknowledgments
The tangential velocity excess of the Milky Way satellites
Creators: name: Cautun, Marius
name: Frenk, Carlos S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We estimate the systemic orbital kinematics of the Milky Way classical satellites and compare them with predictions from the Λ cold dark matter (ΛCDM) model derived from a semi-analytical galaxy formation model applied to high resolution cosmological N-body simulations. We find that the Galactic satellite system is atypical of ΛCDM systems. The subset of 10 Galactic satellites with proper motion measurements has a velocity anisotropy, β=-2.2$\pm$0.4, that lies in the 2.9% tail of the ΛCDM distribution. Individually, the Milky Way satellites have radial velocities that are lower than expected for their proper motions, with 9 out of the 10 having at most 20% of their orbital kinetic energy invested in radial motion. Such extreme values are expected in only 1.5% of ΛCDM satellites systems. This tangential motion excess is unrelated to the existence of a Galactic "disc of satellites". We present theoretical predictions for larger satellite samples that may become available as more proper motion measurements are obtained.
description: 5 pages, 5 figures, MNRAS Letters accepted version; v2 - extended discussion on proper motion uncertainties
Landau's criterion for an anisotropic Bose-Einstein condensate
Creators: name: Yu, Zeng-Qiang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this work, we discuss the Landau's criterion for anisotropic superfluidity. To this end, we consider a point-like impurity moving in a uniform Bose-Einstein condensate with either interparticle dipole-dipole interaction or Raman induced spin-orbit coupling. In both cases, we find that the Landau critical velocity $v_{\rm c}$ is generally smaller than the sound velocity in the moving direction. Beyond $v_{\rm c}$, the energy dissipation rate is explicitly calculated via a perturbation approach. In the plane-wave phase of a spin-orbit coupled Bose gas, the dissipationless motion is suppressed by the Raman coupling even in the direction orthogonal to the recoil momentum. Our predictions can be tested in the experiments with ultracold atoms.
description: 5 pages, 4 figures; published version
Does Experience Determine Performance? A Meta-Analysis on the Experience-Performance Relationship
Creators: name: Peake, Whitney O.
name: Marshall, Maria I.
name: Peake, Whitney O.
name: Marshall, Maria I.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Labor and Human Capital
subject: Entrepreneurship
subject: Experience
subject: Performance
subject: Meta-Analysis

description: The impact of experience on entrepreneurial performance has been widely tested. Although experience is expected to positively impact performance, results are varied. This research synthesizes the current literature by determining systematic sources of variation through both exploratory and ordered probit analyses. Results reveal that start date for data collection and form of experience tested pose a major impact on the probability of obtaining a positive estimate for the experience-performance relationship. This research further emphasizes the need for tightened standards across the experience-performance literature in order to equip both academics and practitioners with better information.
Schwinger pair creation with the backreaction in 3 + 1 dimensions
Creators: name: Liu, Weitao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, I analyze the structure of the QED spacetime lattice and review the Schwinger pair creation process from a thermodynamic point of view. This viewpoint enables the dynamical mean-field calculation for the 3 + 1 dimensional Schwinger pair creation with the backreaction. As an example, I demonstrate how to evaluate the pair creation in a finite volume with external electric fields turned on at $t = 0$. The numerical results show how the backreaction responds to the external fields and influences the pair creation.
Is a black hole shadow a reliable test of the no-hair theorem?
Creators: name: Glampedakis, Kostas
name: Pappas, George
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Capturing the image of the shadow cast by the event horizon of an illuminated black hole is, at the most basic level, an experiment of extreme light deflection in a strongly curved spacetime. As such, the properties of an imaged shadow can be used to probe the general relativistic Kerr nature of astrophysical black holes. As an example of this prospect, it is commonly asserted that a shadow can test the validity of the theory's famous `no hair theorem' for the black hole's mass and spin multipole moments. In this paper, we assess this statement by calculating the shadow's equatorial radius in spacetimes with an arbitrary multipolar structure and within a slow rotation approximation. We find that when moments higher than the quadrupole are taken into account, the shadow acquires a high degree of degeneracy as a function of the deviation from the Kerr multipole moments. The results of our analysis suggest that dark objects with strongly non-Kerr multipolar structure could nevertheless produce a Kerr-like shadow with its characteristic quasi-circular shape.
description: Accepted for publication as a Regular Article in Physical Review D
High-precision calculation of the 4-loop contribution to the electron g-2 in QED
Creators: name: Laporta, Stefano
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I have evaluated up to 1100 digits of precision the contribution of the 891 4-loop Feynman diagrams contributing to the electron $g$-$2$ in QED. The total mass-independent 4-loop contribution is $ a_e = -1.912245764926445574152647167439830054060873390658725345{\ldots} \left(\fracαπ\right)^4$. I have fit a semi-analytical expression to the numerical value. The expression contains harmonic polylogarithms of argument $e^{\frac{iπ}{3}}$, $e^{\frac{2iπ}{3}}$, $e^{\frac{iπ}{2}}$, one-dimensional integrals of products of complete elliptic integrals and six finite parts of master integrals, evaluated up to 4800 digits.
description: 14 pages, 3 figures, 3 tables v2: version published in PRL (specified "mass-independent contribution", figure 2 reformatted)
Stiffness of the human foot and evolution of the transverse arch
Creators: name: Venkadesan, Madhusudhan
name: Dias, Marcelo A.
name: Singh, Dhiraj K.
name: Bandi, Mahesh M.
name: Mandre, Shreyas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Foot stiffness underlies its mechanical function, and is central to the evolution of human bipedal locomotion. The stiff and propulsive human foot has two distinct arches, the longitudinal and transverse. By contrast, the feet of non-human primates are flat and softer. Current understanding of foot stiffness is based on studies that focus solely on the longitudinal arch, and little is known about the mechanical function of the transverse arch. However, common experience suggests that transverse curvature dominates the stiffness; a drooping dollar bill stiffens significantly upon curling it along the transverse direction, not the longitudinal. We derive a normalized curvature parameter that encapsulates the geometric principle underlying the transverse curvature-induced stiffness. We show that the transverse arch accounts for almost all the difference in stiffness between human and monkey feet (vervet monkeys and pig-tailed macaques) by comparing transverse curvature-based predictions against published data on foot stiffness. Using this functional interpretation of the transverse arch, we trace the evolution of hominin feet and show that a human-like stiff foot likely predates Homo by $\sim 1.5$ million years, and appears in the $\sim 3.4$ million year old fossil from Burtele. A distinctly human-like transverse arch is also present in early members of Homo, including Homo naledi, Homo habilis, and Homo erectus. However, the $\sim 3.2$ million year old Australopithecus afarensis is estimated to have possessed a transitional foot, softer than humans and stiffer than other extant primates. A foot with human-like stiffness probably evolved around the same time as other lower limb adaptations for regular bipedality, and well before the emergence of Homo, the longitudinal arch, and other adaptations for endurance running.
description: 22 pages, 7 figures, 4 tables
Scaling laws for random walks in long-range correlated disordered media
Creators: name: Fricke, N.
name: Zierenberg, J.
name: Marenz, M.
name: Spitzner, F. P.
name: Blavatska, V.
name: Janke, W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the scaling laws of diffusion in two-dimensional media with long-range correlated disorder through exact enumeration of random walks. The disordered medium is modelled by percolation clusters with correlations decaying with the distance as a power law, $r^{-a}$, generated with the improved Fourier filtering method. To characterize this type of disorder, we determine the percolation threshold $p_{\text c}$ by investigating cluster-wrapping probabilities. At $p_{\text c}$, we estimate the (sub-diffusive) walk dimension $d_{\text w}$ for different correlation exponents $a$. Above $p_{\text c}$, our results suggest a normal random walk behavior for weak correlations, whereas anomalous diffusion cannot be ruled out in the strongly correlated case, i.e., for small $a$.
description: 11 pages, 6 figures
Limits in Categories of Vietoris Coalgebras
Creators: name: Hofmann, Dirk
name: Neves, Renato
name: Nora, Pedro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.1.1
subject: 18B20

description: Motivated by the need to reason about hybrid systems, we study limits in categories of coalgebras whose underlying functor is a Vietoris polynomial one - intuitively, the topological analogue of a Kripke polynomial functor. Among other results, we prove that every Vietoris polynomial functor admits a final coalgebra if it respects certain conditions concerning separation axioms and compactness. When the functor is restricted to some of the categories induced by these conditions the resulting categories of coalgebras are even complete. As a practical application, we use these developments in the specification and analysis of non-deterministic hybrid systems, in particular to obtain suitable notions of stability, and behaviour.
On the Humble Writing Desk
Creators: name: Saggini Francesca
Publisher: name: Zenodo
Year: 2023
Subjects: history of reading
history of Writing
material culture
biography
writing
Christine de Pisan
gender
Charlotte Bronte
Anthony Trollope
Jane Austen
Rudyard Kipling
Frances Burney
Marshall MacLuhan
media studies
Virginia Woolf
William Cowper
Samuel Richardson
Toni Morrison

description: PPT of the presentation I shall be giving in London on 4 February 2023
Klein's Fundamental 2-Form of Second Kind for the $C_{ab}$ Curves
Creators: name: Suzuki, Joe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper, we derive the exact formula of Klein's fundamental 2-form of second kind for the so-called $C_{ab}$ curves. The problem was initially solved by Klein in the 19th century for the hyper-elliptic curves, but little progress had been seen for its extension for more than 100 years. Recently, it has been addressed by several authors, and was solved for subclasses of the $C_{ab}$ curves whereas they found a way to find its individual solution numerically. The formula gives a standard cohomological basis for the curves, and has many applications in algebraic geometry, physics, and applied mathematics, not just analyzing sigma functions in a general way.
A comparison between quantum chemistry and quantum Monte Carlo techniques for the adsorption of water on the (001) LiH surface
Creators: name: Tsatsoulis, Theodoros
name: Hummel, Felix
name: Usvyat, Denis
name: Schütz, Martin
name: Booth, George H.
name: Binnie, Simon S.
name: Gillan, Michael J.
name: Alfè, Dario
name: Michaelides, Angelos
name: Grüneis, Andreas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a comprehensive benchmark study of the adsorption energy of a single water molecule on the (001) LiH surface using periodic coupled cluster and quantum Monte Carlo theories. We benchmark and compare different implementations of quantum chemical wave function based theories in order to verify the reliability of the predicted adsorption energies and the employed approximations. Furthermore we compare the predicted adsorption energies to those obtained employing widely-used van der Waals density-functionals. Our findings show that quantum chemical approaches are becoming a robust and reliable tool for condensed phase electronic structure calculations, providing an additional tool that can also help in potentially improving currently available van der Waals density-functionals.
A Survey on Event-based News Narrative Extraction
Creators: name: Norambuena, Brian Keith
name: Mitra, Tanushree
name: North, Chris
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Narratives are fundamental to our understanding of the world, providing us with a natural structure for knowledge representation over time. Computational narrative extraction is a subfield of artificial intelligence that makes heavy use of information retrieval and natural language processing techniques. Despite the importance of computational narrative extraction, relatively little scholarly work exists on synthesizing previous research and strategizing future research in the area. In particular, this article focuses on extracting news narratives from an event-centric perspective. Extracting narratives from news data has multiple applications in understanding the evolving information landscape. This survey presents an extensive study of research in the area of event-based news narrative extraction. In particular, we screened over 900 articles that yielded 54 relevant articles. These articles are synthesized and organized by representation model, extraction criteria, and evaluation approaches. Based on the reviewed studies, we identify recent trends, open challenges, and potential research lines.
description: 37 pages, 3 figures, to be published in the journal ACM CSUR
Lorentz-violating pseudovectors in effective field theories for quantum gravity
Creators: name: Williams, Hollis
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Effective field theories which describe the coupling between gravity and matter fields have recently been extended to include terms with operators of non-minimal mass dimension. These terms preserve the usual gauge symmetries but may violate local Lorentz and diffeomorphism invariance. The number of possible terms in the field theory explodes once one allows for non-minimal operators, with no criterion to choose between them. We suggest as such a criterion to focus on terms which violate Lorentz invariance via a (pseudo)vector background field, leaving a number of possible terms in the Higgs, gauge and gravitational sectors. Further study of these terms is motivated by the proposed correspondence between the general effective theory for Lorentz violation and emergent Lorentz symmetry in condensed-matter systems, which is mostly unexplored for higher mass dimension operators and couplings to gauge fields and gravity. We suggest bounds in the Higgs sector and we show that some of the coefficients in the gauge sector vanish at one loop, whereas others have bounds which are comparable with those suggested by Kostelecký and Li for coefficients in Lorentz-violating QCD and QED coupled to quarks. We also find new bounds in the gravitational sector by considering Robertson-Walker cosmology. Finally, we discuss the special case where only diffeomorphism invariance is spontaneously broken and explain why it does not allow for non-trivial Nambu-Goldstone modes.
Neutrinos from cosmic ray interactions in the Sun
Creators: name: Edsjo, Joakim
name: Elevant, Jessica
name: Enberg, Rikard
name: Niblaeus, Carl
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cosmic rays hitting the solar atmosphere generate neutrinos that interact and oscillate in the Sun and oscillate on the way to Earth. These neutrinos could potentially be detected with neutrino telescopes and will be a background for searches for neutrinos from dark matter annihilation in the Sun. We calculate the flux of neutrinos from these cosmic ray interactions in the Sun and also investigate the interactions near a detector on Earth that give rise to muons. We compare this background with both regular Earth-atmospheric neutrinos and signals from dark matter annihilation in the Sun. Our calculation is performed with an event-based Monte Carlo approach that should be suitable as a simulation tool for experimental collaborations. Our program package is released publicly along with this paper.
description: 30 pages, 15 figures, matches published version
ELECTRON TRANSPORT AND ELECTRON DENSITY INSIDE ONE-DIMENSIONAL DISORDERED CONDUCTORS: An Analysis of the Electronic-Levels Contribution
Creators: name: Rivas, Gerardo
name: Yepez, Miztli
name: Mello, Pier A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider the problem of electron transport along a one-dimensional disordered multiple-scattering conductor, and study the electron density for all the electronic levels. A model is proposed for the reduced density matrix of the system placed between two reservoirs at different chemical potentials, and the statistical-mechanical expectation value of the electron density is evaluated. An ensemble average is computed over disordered configurations. We compare its predictions with computer simulations. We find that the contribution of low-lying levels is very different from that of the high-lying ones studied in the past. Going down in energy, the wave function penetrates ever less inside the sample. For high-lying levels, this is interpreted in terms of localization from disorder. For low-lying levels, this interpretation gradually gives way to an understanding in terms of the increasing reflection produced by each scatterer, which is seen by the electron as a higher and higher -- and hence impenetrable -- potential barrier. Indeed, the local-density-of-states, LDOS, is gradually depleted in the interior of the system, since the wave function is ever smaller inside. The problem studied here is also of interest in electromagnetic, thermal, and acoustic transport in disordered systems.
description: 40 pages, 15 figures. Accepted in the journal Waves in Random and Complex Media
Seifert vs slice genera of knots in twist families and a characterization of braid axes
Creators: name: Baker, Kenneth L.
name: Motegi, Kimihiko
Publisher: name: arXiv
Year: 2017
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 57M25, 57M27, Secondary 57R17, 57R58

description: Twisting a knot $K$ in $S^3$ along a disjoint unknot $c$ produces a twist family of knots $\{K_n\}$ indexed by the integers. Comparing the behaviors of the Seifert genus $g(K_n)$ and the slice genus $g_4(K_n)$ under twistings, we prove that if $g(K_n) - g_4(K_n) < C$ for some constant $C$ for infinitely many integers $n > 0$ or $g(K_n) / g_4(K_n) \to 1$ as $n \to \infty$, then either the winding number of $K$ about $c$ is zero or the winding number equals the wrapping number. As a key application, if $\{K_n\}$ or the mirror twist family $\{\overline{K_n}\}$ contains infinitely many tight fibered knots, then the latter must occur. We further develop this to show that $c$ is a braid axis of $K$ if and only if both $\{K_n\}$ and $\{\overline{K_n}\}$ each contain infinitely many tight fibered knots. We also give a necessary and sufficient condition for $\{ K_n \}$ to contain infinitely many L-space knots, and show (modulo a conjecture) that satellite L-space knots are braided satellites.
description: 34 pages, 12 figures
Τα χρηματιστηριακά αδικήματα στην ελληνική έννομη τάξη: Η κατάχρηση προνομιακών πληροφοριών και η χειραγώγηση της αγοράς
Creators: name: Θουλοβασιλείου, Κωνσταντίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Χρηματιστηριακά Αδικήματα
Κατάχρηση προνομιακών πληροφοριών
Χειραγώγηση αγοράς
Κατάχρηση αγοράς
Κεφαλαιαγορά
Χρηματιστηριακή απάτη
Stock market offenses
Insider trading
Market manipulation
Market abuse
Capital markets
Stock market fraud

description: Στόχευση της παρούσας εργασίας αποτελεί η σφαιρική προσέγγιση των χρηματιστηριακών αδικημάτων, ειδικότερα της κατάχρησης και της παράνομης ανακοίνωσης προνομιακών πληροφοριών και της χειραγώγησης της αγοράς, όπως αυτά έχουν τυποποιηθεί στο Ν. 4443/2016 υπό το φως του Κανονισμού (ΕΕ) 596/2014 (MAR) και της οδηγίας 2014/57/ΕΕ (MAD II). Αρχικά και όλως εισαγωγικά, παρουσιάζεται η λειτουργία της κεφαλαιαγοράς και τα συναλλασσόμενα πρόσωπα. Στη συνέχεια, αναλύεται το αδίκημα της κατάχρησης προνομιακών πληροφοριών και της ανακοίνωσης αυτών, μέσα από μία διαχρονική επισκόπηση του νομοθετικού πλαισίου, σε υπερεθνικό και εθνικό επίπεδο. Έπειτα, αναλύεται το αδίκημα της χειραγώγησης της αγοράς υπό το πρίσμα του Ν. 4443/2016. Γίνεται αναλυτική αναφορά στο έννομο αγαθό και στα στοιχεία της νομοτυπικής μορφής των ανωτέρω αδικημάτων, καθώς και στις ειδικότερες δικονομικές ρυθμίσεις που διέπουν τον ειδικό αυτό χώρο οικονομικής εγκληματικότητας. Συγχρόνως, αναλύονται ο ρόλος και η λειτουργία της Επιτροπής Κεφαλαιαγοράς, τα προληπτικά μέτρα, οι απαλλακτικές διατάξεις και η σχέση των ειδικών αυτών αδικημάτων με την κοινή απάτη.
description: The objective of the present paper is the overall approach of the crimes against the capital markets, specifically the insider trading and the market manipulation, as these are described in and according to the no. 4443 Law of 2016, which was inaugurated according to the EU Regulation (EU) 596/2014 and the Directive 2014 / 57 / EU. Initially and as an introduction, this essay attempts a first approach of the function of the Stock Market and its economic operators. Secondly, the crime of “insider trading” (i.e. the abuse of privileged information) is analyzed, through an overview of the legislative context. Afterwards, the crime of market manipulation is described under the light of the no. 4443 Law of 2016. In both previous chapters, there is an extended mention to the protected legal right and the elements of the “actus reus” and “mens rea” of the described crimes, along with the special procedural settings in this specific area of the financial crime. At the same time, the role and the operation of the Hellenic Capital Market Commission (HCMC), the preventive measures, the reasons of exclusion and the relativity between these specific crimes and the common crime of fraud, are analyzed.
description: Επισπεύδον Τμήμα: Τμήμα Νομικής ΑΠΘ, Συμμετέχει: το Τμήμα Νομικής ΔΠΘ
Curcumin delays renal fibrosis by regulating gut microbiota in 5/6Nx rats
Creators: name: CHEN, Xulong
Publisher: name: Zenodo
Year: 2024

description: Renal fibrosis is the last common pathway for the progression of all chronic kidney diseases (CKD) to end-stage kidney disease. Curcumin (CUR), a well-known traditional Chinese medicine and food additive, have attracted widespread attention from researchers.In this study, we assessed the therapeutic effect of CUR on 5/6-nephrectomized (5/6Nx) rats’ model, and explored mechanisms underlying the relationship between gut microbiota and renal fibrosis.Our results showed that the administration of CUR significantly ameliorated renal fibrosis in experimental rats. Renal macrophage infiltration and pro-inflammatory cytokines were effectively reduced by CUR. Besides, CUR markedly improved intestinal barrier function and local inflammation. Further CUR reconstructed gut microbiota in a positive direction, the abundance of beneficial bacteria (including Muribaculaceae, Lachnospiraceae_NK4A136_group and Eubacterium_siraeum_group) increased; metabonomics analysis revealed that CUR reduced uremic retention solutes, and elevated Vitamin D contents, and Spearman correlation analysis indicated that gut genera enriched by CUR were positively correlated with Vitamin D and derivatives, and negatively correlated with renal fibrosis-related indicators and inflammation markers.Mechanistically, we found inhibition of LPS/TLR4/NF-κB and TGF-β1/Smads pathway in CUR-treated rats. In conclusion, our study suggests that CUR is beneficial for recovery of renal fibrosis through modulating gut microbiota and related metabolites, restoring the intestinal barrier and suppressing LPS-induced TLR4-NF-κB signaling,ultimately ameliorating renal fibrosis. This study provides the basis for harnessing CUR's therapeutic potential for treating CKD.
title: The spectrum of the Neumann Poincaré operator on bow-tie curves
Creators: name: Whitehead, Joseph Martin
Publisher: name: University of Reading
Year: 2023

description: The study of the spectral properties of those operators which output potential functions has historically been of great value, particularly in the resolution of certain problems in potential theory and the mathematical study of gravitational and electromagnetic fields. The initial inspiration for this work was to build on the existing body of results that describe the spectrum of the Neumann Poincar´e operator on different surfaces, particularly those with corners and edges. The particular spectral properties of this integral operator align nicely with a number of scenarios discussed in physics, most notably in the study of plasmonics, where there is a noted coincidence between the elements of the spectrum of the Neumann Poincar´e operator when acting on specific function spaces and the phenomena of plasmon resonances. This work is a study of the spectral properties of the Neumann Poincar´e operator when considered over sets bounded by bow-tie curves, formed of two tear drop shapes or ’wings’, each with a corner that coincides, a scenario that distinguishes itself from prior studies in that the surface being acted on is neither completely smooth nor can it be characterized as a Lipschitz domain in the region of the curve’s singular point.
Diffusion equations in inhomogeneous solid having arbitrary gradient concentration
Creators: name: Bilotsky, Y.
name: Gasik, M.
name: Lev, B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A quantum kinetic equation is obtained for an inhomogeneous solid having arbitrary gradient concentration and chemical potential. We find, starting from nonequilibrium statistical operator, a new equation to describe atom migration in solid states. In continuous approximation, this equation turns into a non-linear diffusion equation. We derive conditions for which this equation can be reduced to Fick's or Cahn equation.
description: 5 pages
UnbiasedNets: A Dataset Diversification Framework for Robustness Bias Alleviation in Neural Networks
Creators: name: Naseer, Mahum
name: Prabakaran, Bharath Srinivas
name: Hasan, Osman
name: Shafique, Muhammad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Performance of trained neural network (NN) models, in terms of testing accuracy, has improved remarkably over the past several years, especially with the advent of deep learning. However, even the most accurate NNs can be biased toward a specific output classification due to the inherent bias in the available training datasets, which may propagate to the real-world implementations. This paper deals with the robustness bias, i.e., the bias exhibited by the trained NN by having a significantly large robustness to noise for a certain output class, as compared to the remaining output classes. The bias is shown to result from imbalanced datasets, i.e., the datasets where all output classes are not equally represented. Towards this, we propose the UnbiasedNets framework, which leverages K-means clustering and the NN's noise tolerance to diversify the given training dataset, even from relatively smaller datasets. This generates balanced datasets and reduces the bias within the datasets themselves. To the best of our knowledge, this is the first framework catering to the robustness bias problem in NNs. We use real-world datasets to demonstrate the efficacy of the UnbiasedNets for data diversification, in case of both binary and multi-label classifiers. The results are compared to well-known tools aimed at generating balanced datasets, and illustrate how existing works have limited success while addressing the robustness bias. In contrast, UnbiasedNets provides a notable improvement over existing works, while even reducing the robustness bias significantly in some cases, as observed by comparing the NNs trained on the diversified and original datasets.
description: Springer Machine Learning 2023