cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Synchronization in a multilevel network using the Hamilton-Jacobi-Bellman (HJB) technique
Creators: name: Njougouo, Thierry
name: Camargo, Victor
name: Louodop, Patrick
name: Ferreira, Fernando F
name: Talla, Pierre K.
name: Cerdeira, Hilda A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This paper presents the optimal control and synchronization problem of a multilevel network of Rössler chaotic oscillators. Using the Hamilton-Jacobi-Bellman (HJB) technique, the optimal control law with three-state variables feedback is designed such that the trajectories of all the Rössler oscillators in the network are optimally synchronized in each level. Furthermore, we provide numerical simulations to demonstrate the effectiveness of the proposed approach for the cases of one and three networks. A perfect correlation between the MATLAB and the PSPICE results was obtained, thus allowing the experimental validation of our designed controller and shows the effectiveness of the theoretical results.
From axion quality and naturalness problems to a high-quality $\mathbb{Z}_{N}$ QCD relaxion
Creators: name: Banerjee, Abhishek
name: Eby, Joshua
name: Perez, Gilad
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We highlight general issues associated with quality and naturalness problems in theories of light QCD-axions, axion-like particles, and relaxions. We show the presence of Planck-suppressed operators generically lead to scalar coupling of axions with the Standard model. We present a new class of $\mathbb Z_{N}$ QCD relaxion models that can address both the QCD relaxion CP problem as well as its quality problem. This new class of models also leads to interesting experimental signatures, which can be searched for at the precision frontier.
description: 17 pages, 4 figures; v2: previously ignored effects related to higher harmonics included, available parameter space updated, discussion extended; v3: matches the PRD accepted version
One-dimensional Silicon and Germanium Nanostructures With No Carbon Analogues
Creators: name: Perim, Eric
name: Paupitz, Ricardo
name: Botari, Tiago
name: Galvao, Douglas S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work we report new silicon and germanium tubular nanostructures with no corresponding stable carbon analogues. The electronic and mechanical properties of these new tubes were investigated through ab initio methods. Our results show that the structures have lower energy than their corresponding nanoribbon structures and are stable up to high temperatures (500 and 1000 K, for silicon and germanium tubes, respectively). Both tubes are semiconducting with small indirect band gaps, which can be significantly altered by both compressive and tensile strains. Large bandgap variations of almost 50% were observed for strain rates as small as 3%, suggesting possible applications in sensor devices. They also present high Young's modulus values (0.25 and 0.15 TPa, respectively). TEM images were simulated to help the identification of these new structures.
title: (Gerechte) Leistungsbeurteilung im Mathematikunterricht
Creators: name: Raumauf, Peter
Year: 2022

description: Die vorliegende Arbeit hatte als Ziel, die rechtlichen Vorgaben sowie die wissenschaftlichen Grundlagen der Leistungsfeststellung und -beurteilung darzulegen. Weiters wurde eine Umfrage unter Kollegen durchgeführt, wie die Leistungsfeststellung und -beurteilung in der Realität ausgeführt wird und, ob es dabei zu Divergenzen mit den rechtlichen Vorgaben und den wissenschaftlichen Grundlagen kommt. Die rechtlichen Grundlagen der Leistungsbeurteilung finden sich vor allem im SchUG und in der LBVO. Der Gesetzgeber unterscheidet sehr klar zwischen der Leistungsfeststellung und der Leistungsbeurteilung. Während die Leistungsfeststellung weitgehend klare Regelungen aufweist, werden den Lehrkräften in Bezug auf die Beurteilung dieser Leistungsfeststellungen sowie der Ermittlung der Semester- bzw. Jahresnote sehr viele Freiheiten gewährt. Die aktuelle Literatur sieht punktuelle Leistungsfeststellungen (wie Schularbeiten oder Prüfungen) grundsätzlich kritisch und bevorzugt Leistungsfeststellungen, die einen längeren Zeitraum berücksichtigen. Entsprechende Möglichkeiten (wie zum Beispiel Portfolios) werden als mögliche Alternativen vorgestellt. In mehreren Fällen wird auch das aktuelle Notensystem zumindest in Frage gestellt. Die derzeit gültige Gesetzeslage lässt jedoch die, von der Wissenschaft empfohlenen, Methoden nur sehr begrenzt zu. Die durchgeführte Umfrage zeigt, dass die rechtlichen Vorgaben von den befragten Lehrpersonen großteils eingehalten werden. Kleinere Widersprüche lassen sich finden, massives rechtswidriges Verhalten ist jedoch in keinem Fall gegeben. Die Vorgehensweise in Bezug auf die Leistungsbeurteilung war bei allen befragten Lehrpersonen weitgehend ident. Mit einer Ausnahme gaben alle Lehrpersonen an, die Mitarbeit für die Ermittlung der Semester- bzw. Jahresnote zumindest ebenso stark zu gewichten wie die Schularbeiten (in einigen Fällen sogar stärker). Ebenfalls sehr einheitlich waren die Angaben, woraus sich die Mitarbeitsnote zusammensetzt. Demnach zählen Hausübungen, Wiederholungen sowie „Mitmachen im Unterricht“ zur Mitarbeit. Die Mehrheit der befragten Lehrpersonen berücksichtigt alle drei dieser Leistungsfeststellungen, in zwei Fällen werden keine Wiederholungen durchgeführt und in zwei anderen Fällen wird die Mitarbeit im engeren Sinn nicht oder nur überblicksmäßig berücksichtigt. Alle befragten Lehrpersonen gaben weiters an, dass die Leistungsbeurteilung im Rahmen der Ausbildung zu kurz kommt und entsprechende Lehrveranstaltungen sehr wünschenswert wären.
The Galactic Center: Not an Active Galactic Nucleus
Creators: name: An, Deokkeun
name: Ramírez, Solange V.
name: Sellgren, Kris
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present 10um-35um Spitzer spectra of the interstellar medium in the Central Molecular Zone (CMZ), the central 210 pc x 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region. The radial velocities and intensities of ionic lines and H2 suggest that most of the H2 0-0 S(0) emission comes from gas along the line-of-sight, as found by previous work. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby Galaxies Survey (SINGS) to our data. Previous work shows that forbidden line ratios can distinguish star-forming galaxies from LINERs and AGNs. Our GC line ratios agree with star-forming galaxies and not with LINERs or AGNs.
description: Accepted for publication in the ApJ Supplement Series
Determining Reflectance Spectra of Surfaces and Clouds on Exoplanets
Creators: name: Cowan, Nicolas B.
name: Strait, Talia E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Planned missions will spatially resolve temperate terrestrial planets from their host star. Although reflected light from such a planet encodes information about its surface, it has not been shown how to establish surface characteristics of a planet without assuming known surfaces to begin with. We present a re-analysis of disk-integrated, time-resolved, multiband photometry of Earth obtained by the Deep Impact spacecraft as part of the EPOXI Mission of Opportunity. We extract reflectance spectra of clouds, ocean and land without a priori knowledge of the numbers or colors of these surfaces. We show that the inverse problem of extracting surface spectra from such data is a novel and extreme instance of spectral unmixing, a well-studied problem in remote sensing. Principal component analysis is used to determine an appropriate number of model surfaces with which to interpret the data. Shrink-wrapping a simplex to the color excursions of the planet yields a conservative estimate of the planet's endmember spectra. The resulting surface maps are unphysical, however, requiring negative or larger-than-unity surface coverage at certain locations. Our "rotational unmixing" supersedes the endmember analysis by simultaneously solving for the surface spectra and their geographical distributions on the planet, under the assumption of diffuse reflection and known viewing geometry. We use a Markov Chain Monte Carlo to determine best-fit parameters and their uncertainties. The resulting albedo spectra are similar to clouds, ocean and land seen through a Rayleigh-scattering atmosphere. This study suggests that future direct-imaging efforts could identify and map unknown surfaces and clouds on exoplanets.
description: 5 pages, 5 figures, ApJL accepted
Ultrafast laser-driven topological spin textures on a 2D magnet
Creators: name: Strungaru, Mara
name: Augustin, Mathias
name: Santos, Elton J. G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ultrafast laser excitations provide an efficient and low-power consumption alternative since different magnetic properties and topological spin states can be triggered and manipulated at the femtosecond (fs) regime. However, it is largely unknown whether laser excitations already used in data information platforms can manipulate the magnetic properties of recently discovered two-dimensional (2D) van der Waals (vdW) materials. Here we show that ultrashort laser pulses (30$-$85 fs) can not only manipulate magnetic domains of 2D-XY CrCl$_3$ ferromagnets, but also induce the formation and control of topological nontrivial meron and antimeron spin textures. We observed that these spin quasiparticles are created within $\sim$100 ps after the excitation displaying rich dynamics through motion, collision and annihilation with emission of spin waves throughout the surface. Our findings highlight substantial opportunities of using photonic driving forces for the exploration of spin textures on 2D magnetic materials towards magneto-optical topological applications.
description: https://www.nature.com/articles/s41524-022-00864-x
Operator Quantum Zeno Effect: Protecting Quantum Information with Noisy Two-Qubit Interactions
Creators: name: Wang, Shu-Chao
name: Li, Ying
name: Wang, Xiang-Bin
name: Kwek, Leong Chuan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The time evolution of some quantum states can be slowed down or even stopped under frequent measurements. This is the usual quantum Zeno effect. Here, we report an operator quantum Zeno effect, in which the evolution of some physical observables is slowed down through measurements even though the quantum state changes randomly with time. Based on the operator quantum Zeno effect, we show how we can protect quantum information from decoherence with two-qubit measurements, realizable with noisy two-qubit interactions.
description: accepted by Phys. Rev. Lett
A Systematic Review of Machine Learning Techniques for Cattle Identification: Datasets, Methods and Future Directions
Creators: name: Hossain, Md Ekramul
name: Kabir, Muhammad Ashad
name: Zheng, Lihong
name: Swain, Dave L.
name: McGrath, Shawn
name: Medway, Jonathan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Increased biosecurity and food safety requirements may increase demand for efficient traceability and identification systems of livestock in the supply chain. The advanced technologies of machine learning and computer vision have been applied in precision livestock management, including critical disease detection, vaccination, production management, tracking, and health monitoring. This paper offers a systematic literature review (SLR) of vision-based cattle identification. More specifically, this SLR is to identify and analyse the research related to cattle identification using Machine Learning (ML) and Deep Learning (DL). For the two main applications of cattle detection and cattle identification, all the ML based papers only solve cattle identification problems. However, both detection and identification problems were studied in the DL based papers. Based on our survey report, the most used ML models for cattle identification were support vector machine (SVM), k-nearest neighbour (KNN), and artificial neural network (ANN). Convolutional neural network (CNN), residual network (ResNet), Inception, You Only Look Once (YOLO), and Faster R-CNN were popular DL models in the selected papers. Among these papers, the most distinguishing features were the muzzle prints and coat patterns of cattle. Local binary pattern (LBP), speeded up robust features (SURF), scale-invariant feature transform (SIFT), and Inception or CNN were identified as the most used feature extraction methods.
description: 34 pages, 14 figures
Pattern Characterization Using Topological Data Analysis: Application to Piezo Vibration Striking Treatment
Creators: name: Chumley, Max M.
name: Yesilli, Melih C.
name: Chen, Jisheng
name: Khasawneh, Firas A.
name: Guo, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Geometry (cs.CG)
subject: Algebraic Topology (math.AT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Quantifying patterns in visual or tactile textures provides important information about the process or phenomena that generated these patterns. In manufacturing, these patterns can be intentionally introduced as a design feature, or they can be a byproduct of a specific process. Since surface texture has significant impact on the mechanical properties and the longevity of the workpiece, it is important to develop tools for quantifying surface patterns and, when applicable, comparing them to their nominal counterparts. While existing tools may be able to indicate the existence of a pattern, they typically do not provide more information about the pattern structure, or how much it deviates from a nominal pattern. Further, prior works do not provide automatic or algorithmic approaches for quantifying other pattern characteristics such as depths' consistency, and variations in the pattern motifs at different level sets. This paper leverages persistent homology from Topological Data Analysis (TDA) to derive noise-robust scores for quantifying motifs' depth and roundness in a pattern. Specifically, sublevel persistence is used to derive scores that quantify the consistency of indentation depths at any level set in Piezo Vibration Striking Treatment (PVST) surfaces. Moreover, we combine sublevel persistence with the distance transform to quantify the consistency of the indentation radii, and to compare them with the nominal ones. Although the tool in our PVST experiments had a semi-spherical profile, we present a generalization of our approach to tools/motifs of arbitrary shapes thus making our method applicable to other pattern-generating manufacturing processes.
description: Updated 6/9/23 to include changes from the review process. Main updates: redefined roundness score to be consistent with the outputs from the depth score (percentage), all quantities defined in terms of radius instead of diameter, added noise study to demonstrate noise robustness of the scores
Musielak-Orlicz-Hardy Spaces Associated with Operators Satisfying Reinforced Off-Diagonal Estimates
Creators: name: Bui, The Anh
name: Cao, Jun
name: Ky, Luong Dang
name: Yang, Dachun
name: Yang, Sibei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary: 42B35, Secondary: 42B30, 42B25, 42B20, 35J10, 46E30, 47B38, 47B06, 30L99

description: Let $\mathcal{X}$ be a metric space with doubling measure and $L$ a one-to-one operator of type $ω$ having a bounded $H_\infty$-functional calculus in $L^2(\mathcal{X})$ satisfying the reinforced $(p_L, q_L)$ off-diagonal estimates on balls, where $p_L\in[1,2)$ and $q_L\in(2,\infty]$. Let $φ:\,\mathcal{X}\times[0,\infty)\to[0,\infty)$ be a function such that $φ(x,\cdot)$ is an Orlicz function, $φ(\cdot,t)\in {\mathbb A}_{\infty}(\mathcal{X})$ (the class of uniformly Muckenhoupt weights), its uniformly critical upper type index $I(φ)\in(0,1]$ and $φ(\cdot,t)$ satisfies the uniformly reverse Hölder inequality of order $(q_L/I(φ))'$. In this paper, the authors introduce a Musielak-Orlicz-Hardy space $H_{φ,\,L}(\mathcal{X})$, via the Lusin-area function associated with $L$, and establish its molecular characterization. In particular, when $L$ is nonnegative self-adjoint and satisfies the Davies-Gaffney estimates, the atomic characterization of $H_{φ,\,L}(\mathcal{X})$ is also obtained. Furthermore, a sufficient condition for the equivalence between $H_{φ,\,L}(\mathbb{R}^n)$ and the classical Musielak-Orlicz-Hardy space $H_φ(\mathbb{R}^n)$ is given. Moreover, for the Musielak-Orlicz-Hardy space $H_{φ,\,L}(\mathbb{R}^n)$ associated with the second order elliptic operator in divergence form on $\rn$ or the Schrödinger operator $L:=-Δ+V$ with $0\le V\in L^1_{\mathrm{loc}}(\mathbb{R}^n)$, the authors further obtain its several equivalent characterizations in terms of various non-tangential and radial maximal functions; finally, the authors discuss the boundedness of the Riesz transform $\nabla L^{-1/2}$.
description: Published in Analysis and Geometry in Metric Spaces, volume 1 (2012), 69-129. arXiv admin note: text overlap with arXiv:1201.5512
Venus boundary layer dynamics: eolian transport and convective vortex
Creators: name: Lefèvre, Maxence
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Few spacecraft have studied the dynamics of Venus' deep atmosphere, which is needed to understand the interactions between the surface and atmosphere. Recent global simulations suggest a strong effect of the diurnal cycle of surface winds on the depth of the planetary boundary layer. We propose to use a turbulent-resolving model to characterize the Venus boundary layer and the impact of surface winds for the first time. Simulations were performed in the low plain and high terrain at the Equator and noon and midnight. A strong diurnal cycle is resolved in the high terrain, with a convective layer reaching 7 km above the local surface and vertical wind of 1.3 m/s. The boundary layer depth in the low plain is consistent with the observed wavelength of the dune fields. At noon, the resolved surface wind field for both locations is strong enough to lift dust particles and engender micro-dunes. Convective vortices are resolved for the first time on Venus.
description: 17 pages, 7 figures, 1 table
Ordering kinetics in active polar fluid
Creators: name: Dikshit, Shambhavi
name: Mishra, Shradha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We model the active polar fluid as a collection of orientable objects supplied with active stresses and momentum damping coming from the viscosity of bulk fluid medium. The growth kinetics of local orientation field is studied. The effect of active fluid is contractile or extensile depending upon the sign of the active stress. We explore the growth kinetics for different activities. We observe that for both extensile and contractile cases the growth is altered by a prefactor when compared to the equilibrium Model A. We find that the extensile fluid enhances the domain growth whereas the contractile fluid supresses it. The asymptotic growth becomes pure algebraic for large magnitudes of activity. We also find that the domain morphology remains unchanged due to activity and system shows the good dynamic scaling for all activities. Our study provides the understanding of ordering kinetics in active polar gel.
Tidal Stirring of Disky Dwarfs with Shallow Dark Matter Density Profiles: Enhanced Transformation into Dwarf Spheroidals
Creators: name: Kazantzidis, Stelios
name: Lokas, Ewa L.
name: Mayer, Lucio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (Abridged) The origin of dSphs in the Local Group (LG) remains an enigma. The tidal stirring model posits that late-type, rotationally-supported dwarfs resembling present-day dwarf irregular (dIrr) galaxies can transform into dSphs via interactions with Milky Way-sized hosts. Using collisionless N-body simulations, we investigate for the first time how tidal stirring depends on the dark matter (DM) density distribution in the central stellar region of the progenitor disky dwarf. Specifically, we explore various asymptotic inner slopes gamma of the dwarf DM density profiles (rho \propto r^{-gamma} as r -> 0). For a given orbit inside the primary, rotationally-supported dwarfs embedded in DM halos with core-like density distributions (gamma = 0.2) and mild density cusps (gamma = 0.6) demonstrate a substantially enhanced likelihood and efficiency of transformation into dSphs compared to their counterparts with steeper DM density profiles (gamma = 1). Such shallow DM distributions are akin to those of observed dIrrs, highlighting tidal stirring as a plausible model for the LG morphology-density relation. When gamma <1, a single pericentric passage can induce dSph formation and disky dwarfs on low-eccentricity or large-pericenter orbits are able to transform into dSphs; these new results allow the tidal stirring model to explain the existence of virtually all known dSphs across a wide range of distances from their hosts. A subset of rotationally-supported dwarfs with gamma <1 are eventually disrupted by the primary; those that survive as dSphs are generally on orbits that are biased towards lower eccentricities and/or larger pericenters relative to those of typical CDM satellites. The latter could explain the rather peculiar orbits of several classic LG dSphs such as Fornax, Leo I, Tucana, and Cetus.
description: Accepted for publication in ApJ Letters, 8 pages, 3 figures, LaTeX (uses emulateapj.cls)
Conditional statistical properties of the complex systems having long-range interactions
Creators: name: Huang, Zhifu
name: Ou, Congjie
name: Lin, Bihong
name: Su, Guozhen
name: Chen, Jincan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A new concept of the available force is proposed to investigate the performance of the complex systems having long-range interactions. Since the covariance of average velocity in double time interval and available force equals zero, it is possible to calculate the conditional probability distribution function (CPDF) within the systems. It is found that the asymmetric CPDF of the velocity between two adjacent time intervals can be derived from the symmetrical CPDF between the available force and the double time interval velocity. Two typical currency exchange databases, i.e., EUR/USD and GBP/USD, which collect the minutely opening exchange prices from 1 January 1999 to 31 December 2011, are adopted as examples. It is found that the analytical CPDF needs only six parameters for an arbitrary system. By calculating the CPDF in the currency exchange databases, it is shown that the results are well fitted by our analytical expression. The analytical CPDF can be also used to calculate the conditional expectation and the conditional variance of velocity. Interestingly, the two databases show that the conditional expectation of the velocity between two adjacent time intervals is not monotonic, while the conditional variance tends to monotonic. All of these results are well described by our theory. It is worthwhile to note that the analytical CPDF is a general expression. It is valid not only for current exchange systems but also for any complex systems having long-range interactions and/or long-duration memory.
description: 21 pages, 4figures
Computed multivalues of AGM reveal periodicities of inverse functions
Creators: name: Lamarche, François
name: Ruhland, Helmut
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33E05, 30-08, 97I80

description: The article shows how two choices are possible whenever computing the geometric mean, and the repetition of this process can in general yield 2-to-the power N different values when the choices are compounded in the first N steps of evaluation of the arithmetic-geometric mean. This happens not only in the simple AGM involved in the computation of the complete elliptic integral of the first kind, but also in analogous methods for the computation of the complete and incomplete elliptic integrals of the first and second kind.
description: DOI added
The Impact of Turbulent Vertical Mixing in the Venus Clouds on Chemical Tracers
Creators: name: Lefèvre, Maxence
name: Marcq, Emmanuel
name: Lefèvre, Franck
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Venus clouds host a convective layer between roughly 50 and 60 km that mixes heat, momentum, and chemical species. Observations and numerical modelling have helped to understand the complexity of this region. However, the impact on chemistry is still not known. Here, we use for the first time a three-dimensional convection-resolving model with passive tracers to mimic SO$_2$ and H$_2$O for two latitudinal cases. The tracers are relaxed towards a vertical profile in agreement with measured values, with a timescale varying over several orders of magnitude. The vertical mixing is quantified, it is strong for a relaxation timescale high in front of the convective timescale, around 4 hours. The spatial and temporal variability of the tracer due to the convective activity is estimated, with horizontal structures of several kilometres. At the Equator, the model is resolving a convective layer at the cloud top (70 km) suggested by some observations, the impact of such turbulent activity on chemical species is accounted for the first time. From the resolved convective plumes, a vertical eddy diffusion is estimated, consistent with past estimations from in-situ measurements, but several orders of magnitude higher than values used in 1D chemistry modelling. The results are compared to observations, with some spatial and temporal variability correlation, suggesting an impact of the convective layer on the chemical species.
description: 24 pages, 9 figures, 1 table
title: Exploring the balance of ecological, economic, governance, and social considerations in marine protected area network evaluations
Creators: name: Miller-Meehan, Mairi C.
Publisher: name: Memorial University of Newfoundland
Year: 2023

description: Marine protected area networks (MPANs) are a critical tool at the forefront of global marine biodiversity conservation and sustainable development agendas. MPANs are complex tools that seek to provide important ecological and human benefits. The Convention on Biological Diversity “Aichi Targets” were developed to safeguard biodiversity and enhance benefits for people through sustainable use. Target 11 (draft 2030 action Target 3) describes elements of the key (environmental, economic, governance, social) dimensions associated with MPANs from a global perspective. Understanding the balance of these interrelated dimensions in MPAN evaluations is critical to developing future conservation strategies that can adapt to changing contexts and conditions. This dissertation draws on Aichi Biodiversity Target 11, and its associated multidimensional foundation to understand how MPANs are evaluated toward their global targets. The research herein was grounded in this multidimensional context to offer insight into how MPANs have been evaluated. I performed a systematic literature review to understand the indicators used to evaluate Aichi Target 11 qualitative elements. Results showed that the qualitative elements were unevenly evaluated in MPAN literature. I then conducted a two-part online survey to characterize attributes of ecological, economic, governance, and social dimensions considered in MPAN evaluations, and identify the indicators used to evaluate them. Survey results indicated that MPANs with both biodiversity and socially-oriented objectives considered a larger suite of attributes in their evaluations than those without social considerations, without de-emphasizing ecological considerations. In practice, attributes were informed by a suite of indicators with varied composition, unlike the single, attribute-specific indicators identified in the literature. This dissertation aligned with an increased interest in MPANs that go beyond a focus solely on biodiversity conservation to encompass sustainable models, which incorporate socially-oriented objectives. The findings revealed limited use of approaches that holistically assess MPANs. Existing practices tend to be biased towards ecological and governance dimensions. Future research is needed to identify attributes and indicators to help elucidate challenges from all dimensions, and in every part of the MPAN process, from design through evaluation.
Atmospheric turbulence and magnetic field amplification in hot Jupiters
Creators: name: Soriano-Guerrero, Clàudia
Publisher: name: Zenodo
Year: 2023
Subjects: Hot Jupiters
Exoplanets
MHD simulations
Ultra hot Jupiters

description: Hot Jupiters (HJs) are gas giants orbiting very close to their host stars. These planets have inflated radii that cannot be accounted for standard cooling models. Various mechanisms have been proposed, among which is Ohmic dissipation based on the dissipation of currents induced by the magnetic field stretching due to the flow motion. This work in progress focuses on the effect of atmospheric turbulence on magnetic fields and Ohmic dissipation in the upper atmosphere of HJs. Box simulations representing tiny atmospheric columns are used to evaluate where electrical currents are induced by the shear layer and the turbulence and quantify them. We perform ideal magnetohydrodynamic (MHD) simulations applicable for very Hot Jupiters. We find strong magnetic fields (up to kG locally) and currents at equilibrium, induced by enforcing the local effects of zonal jets and, at a lesser extent, turbulent perturbations. These models will be used to quantitatively assess
 the radius inflation, by calculating the (high) conductivity profile.
On Flattened Parking Functions
Creators: name: Elder, Jennifer
name: Harris, Pamela E.
name: Markman, Zoe
name: Tahir, Izah
name: Verga, Amanda
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A05 (Primary) 05A10, 05A15, 05A18 (Secondary)

description: A permutation of length $n$ is called a flattened partition if the leading terms of maximal chains of ascents (called runs) are in increasing order. We analogously define flattened parking functions: a subset of parking functions for which the leading terms of maximal chains of weak ascents (also called runs) are in weakly increasing order. For $n\leq 8$, where there are at most four runs, we give data for the number of flattened parking functions, and it remains an open problem to give formulas for their enumeration in general. We then specialize to a subset of flattened parking functions that we call $\mathcal{S}$-insertion flattened parking functions. These are obtained by inserting all numbers of a multiset $ \mathcal{S}$ whose elements are in $[n]=\{1,2,\ldots,n\}$, into a permutation of $[n]$ and checking that the result is flattened. We provide bijections between $\mathcal{S}$-insertion flattened parking functions and $\mathcal{S}'$-insertion flattened parking functions, where $\mathcal{S}$ and $\mathcal{S}'$ have certain relations. We then further specialize to the case $\mathcal{S}=\textbf{1}_r$, the multiset with $r$ ones, and we establish a bijection between $\textbf{1}_r$-insertion flattened parking functions and set partitions of $[n+r]$ with the first $r$ integers in different subsets.
description: 34 pages, two tables, appeared in the Journal of Integer Sequences
Binary optimal linear codes with various hull dimensions and entanglement-assisted QECC
Creators: name: Kim, Jon-Lark
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94B05

description: The hull of a linear code $C$ is the intersection of $C$ with its dual. To the best of our knowledge, there are very few constructions of binary linear codes with the hull dimension $\ge 2$ except for self-orthogonal codes. We propose a building-up construction to obtain a plenty of binary $[n+2, k+1]$ codes with hull dimension $\ell, \ell +1$, or $\ell +2$ from a given binary $[n,k]$ code with hull dimension $\ell$. In particular, with respect to hull dimensions 1 and 2, we construct all binary optimal $[n, k]$ codes of lengths up to 13. With respect to hull dimensions 3, 4, and 5, we construct all binary optimal $[n,k]$ codes of lengths up to 12 and the best possible minimum distances of $[13,k]$ codes for $3 \le k \le 10$. As an application, we apply our binary optimal codes with a given hull dimension to construct several entanglement-assisted quantum error-correcting codes(EAQECC) with the best known parameters.
description: 27 pages
On the transition to dripping of an inverted liquid film
Creators: name: Blyth, M. G.
name: Lin, T. -S.
name: Tseluiko, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The transition to dripping in the gravity-driven flow of a liquid film under an inclined plate is investigated at zero Reynolds number. Computations are carried out on a periodic domain assuming either a fixed fluid volume or a fixed flow rate for a hierarchy of models: two lubrication models with either linearised curvature or full curvature (the LCM and FCM, respectively), and the full equations of Stokes flow. Of particular interest is the breakdown of travelling-wave solutions as the plate inclination angle is increased. For any fixed volume the LCM reaches the horizontal state where it attains a cosine-shaped profile. For sufficiently small volume, the FCM and Stokes solutions attain a weak Young-Laplace equilibrium profile, the approach to which is described by an asymptotic analysis generalising that of Kalliadasis & Chang (1994) for the LCM. For large volumes, the bifurcation curves for the FCM and Stokes model have a turning point so that the fully inverted state is never reached. For fixed flow rate the LCM blows up at a critical angle that is well predicted by asymptotic analysis. The bifurcation curve for the FCM either has a turning point or else reaches a point at which the surface profile has an infinite slope singularity, indicating the onset of multi-valuedness. The latter is confirmed by the Stokes model which can be continued to obtain overturning surface profiles. Overall the thin-film models either provide an accurate prediction for dripping onset or else supply an upper bound on the critical inclination angle.
Neutron rich nuclei and neutron stars
Creators: name: Horowitz, C. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The PREX experiment at Jefferson Laboratory measures the neutron radius of 208Pb with parity violating electron scattering in a way that is free from most strong interaction uncertainties. The 208Pb radius has important implications for neutron rich matter and the structure of neutron stars. We present first PREX results, describe future plans, and discuss a follow on measurement of the neutron radius of 48Ca. We review radio and X-ray observations of neutron star masses and radii. These constrain the equation of state (pressure versus density) of neutron rich matter. We present a new energy functional that is simultaneously fit to both nuclear and neutron star properties. In this approach, neutron star masses and radii constrain the energy of neutron matter. This avoids having to rely on model dependent microscopic calculations of neutron matter. The functional is then used to predict the location of the drip lines and the properties of very neutron rich heavy nuclei.
description: 8 pages, 4 figures, proceedings of International Conference on Fission and Neutron Rich Nuclei 5, Sanibel, FL
Working Capital Turnover (WCT) Ratio in Islamic and Conventional Banking: Mapping Research Topics using VOSviewer Bibliometric and Library Research
Creators: name: Budianto, Eka Wahyu Hestya
name: Dewi, Nindi Dwi Tetria Dewi
Publisher: name: Zenodo
Year: 2023

description: Purpose - This study aims to determine the research mapping regarding the Working Capital Turnover (WCT) ratio in Islamic and Conventional Banking using a mix-method approach, namely the VOSviewer bibliometric study and literature review.
Research Method – Data analysis techniques include: (1) mapping the distribution of journal publications around the WCT ratio; (2) mapping the results of the VOSviewer bibliometric visualization around the WCT ratio based on the number of clusters and their items; and (3) mapping research topics around the WCT ratio using a literature review study.
Findings – The results showed that: (1) based on the distribution of journal publications, there were 89 journal publications regarding the WCT ratio; (2) based on the mapping of the VOSviewer bibliometric study, the network visualization results around the WCT ratio are divided into 6 clusters and 130 topic items; (3) based on the mapping of literature review studies, there are 19 topics around the WCT ratio.
Implication - The implications and contributions of this research are to map research topics around WCT ratios in Islamic and Conventional Banking which are often or rarely researched by researchers so that they can be a reference for subsequent researchers.
Exploiting spatial information with the informed complex-valued spatial autoencoder for target speaker extraction
Creators: name: Briegleb, Annika
name: Halimeh, Mhd Modar
name: Kellermann, Walter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In conventional multichannel audio signal enhancement, spatial and spectral filtering are often performed sequentially. In contrast, it has been shown that for neural spatial filtering a joint approach of spectro-spatial filtering is more beneficial. In this contribution, we investigate the spatial filtering performed by such a time-varying spectro-spatial filter. We extend the recently proposed complex-valued spatial autoencoder (COSPA) for the task of target speaker extraction by leveraging its interpretable structure and purposefully informing the network of the target speaker's position. We show that the resulting informed COSPA (iCOSPA) effectively and flexibly extracts a target speaker from a mixture of speakers. We also find that the proposed architecture is well capable of learning pronounced spatial selectivity patterns and show that the results depend significantly on the training target and the reference signal when computing various evaluation metrics.
description: Accepted to 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Rhodes Island, Greece. 5 pages, 2 figures
Mapping State Transition Susceptibility in Quantum Annealing
Creators: name: Pelofske, Elijah
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Discrete Mathematics (cs.DM)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum annealing is a novel type of analog computation that aims to use quantum mechanical fluctuations to search for optimal solutions of Ising problems. Quantum annealing in the transverse field Ising model, implemented on D-Wave devices, works by applying a time dependent transverse field, which puts all qubits into a uniform state of superposition, and then applying a Hamiltonian over time which describes a user programmed Ising problem. We present a method which utilizes two control features of D-Wave quantum annealers, reverse annealing and an h-gain schedule, to quantify the susceptibility, or the distance, between two classical states of an Ising problem. The starting state is encoded using reverse annealing, and the second state is encoded on the linear terms of problem Hamiltonian. An h-gain schedule is specified which incrementally increases the strength of the linear terms, thus allowing a quantification of the h-gain strength required to transition the anneal into a specific state at the final measurement. By the nature of quantum annealing, the state tends towards global minima and therefore we restrict the second classical state to a minimum solution of the given Ising problem. This susceptibility mapping, when enumerated across all initial states, shows in detail the behavior of the quantum annealer during reverse annealing. The procedure is experimentally demonstrated on three small test Ising's which were embedded in parallel on the D-Wave Advantage_system4.1. Analysis of the state transition mapping shows detailed characteristics of the reverse annealing process including intermediate state transition paths, which are visually represented as state transition networks.
description: Typo fixes and updated figures
Automated Identification of Tree Species by Bark Texture Classification Using Convolutional Neural Networks
Creators: name: Faizal, Sahil
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Identification of tree species plays a key role in forestry related tasks like forest conservation, disease diagnosis and plant production. There had been a debate regarding the part of the tree to be used for differentiation, whether it should be leaves, fruits, flowers or bark. Studies have proven that bark is of utmost importance as it will be present despite seasonal variations and provides a characteristic identity to a tree by variations in the structure. In this paper, a deep learning based approach is presented by leveraging the method of computer vision to classify 50 tree species, on the basis of bark texture using the BarkVN-50 dataset. This is the maximum number of trees being considered for bark classification till now. A convolutional neural network(CNN), ResNet101 has been implemented using transfer-learning based technique of fine tuning to maximise the model performance. The model produced an overall accuracy of >94% during the evaluation. The performance validation has been done using K-Fold Cross Validation and by testing on unseen data collected from the Internet, this proved the model's generalization capability for real-world uses.
description: 11 Pages, 10 Figures and 2 Tables
A Decomposition Approach to Multi-Agent Systems with Bernoulli Packet Loss
Creators: name: Hespe, Christian
name: Saadabadi, Hamideh
name: Datar, Adwait
name: Werner, Herbert
name: Tang, Yang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we extend the decomposable systems framework to multi-agent systems with Bernoulli distributed packet loss with uniform probability. The proposed sufficient analysis conditions for mean-square stability and $H_2$-performance -- which are expressed in the form of linear matrix inequalities -- scale linearly with increased network size and thus allow to analyse even very large-scale multi-agent systems. A numerical example demonstrates the potential of the approach by application to a first-order consensus problem.
description: 11 pages, 4 figures. Update to accepted version after minor revision
Physical design of FEL injector based on performance-enhanced EC-ITC RF gun
Creators: name: Hu, Tong-ning
name: Chen, Qu-shan
name: Pei, Yuan-ji
name: Li, Ji
name: Qin, Bin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: To meet requirements of high performance THz-FEL (Free Electron Laser), a compact scheme of FEL injector was proposed. Thermionic cathode was chosen to emit electrons instead of photo-cathode with complex structure and high cost. The effective bunch charge was improved to ~200pC by adopting enhanced EC-ITC (External Cathode Independently Tunable Cells) RF gun to extract micro-bunches, and back bombardment effects were almost eliminated as well. Constant gradient accelerator structures were designed to improve energy to ~14MeV, while focusing system was applied for emittance suppressing and bunch state maintenance. Physical design and beam dynamics of key components for FEL injector were analyzed. Furthermore, start-to-end simulations with multi-pulses were performed by using homemade MATLAB and Parmela. The results show that continual high brightness electron bunches with low energy spread and emittance could be obtained stably.
description: 6 pages, 13 figures; accepted by Chinese Physics C
Asymptotics of quantum channels
Creators: name: Amato, Daniele
name: Facchi, Paolo
name: Konderak, Arturo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss several aspects concerning the asymptotic dynamics of dicrete-time semigroups associated with a quantum channel. By using an explicit expression of the asymptotic map, which describes the action of the quantum channel on its attractor manifold, we investigate the role of permutations in the asymptotic dynamics. We show that, in general, they make the asymptotic evolution non-unitary, and they are related to the divisibility of the quantum channel. Also, we derive several results about the asymptotics of faithful and non-faithful channels, and we establish a constructive unfolding theorem for the asymptotic dynamics.
description: 27 pages
ВОПРОСЫ ИЗУЧЕНИЯ И ПРЕПОДАВАНИЯ  РУССКОГО ЯЗЫКА
Creators: name: Расулова Доно Тахировна Старший преподаватель кафедры Языков  Академии Министерства по чрезвычайным ситуациям  Республики Узбекистан
Publisher: name: Zenodo
Year: 2023

description: В данной статье раскрываются вопросы изучения русского языка в Узбекистане, необходимости модернизации узбекского образования и повышения качества изучения русского языка. Использование новых форм организации учебного процесса и современных образовательных технологий.
Ключевые слова:
 изучение русского языка, модернизация узбекского образования, повышение качества образования, современные технологии