cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FOLIYEV KISLOTA YETISHMOVCHILIGI PROFILAKTIKASI
Creators: name: Kamalova, Gulnaz
Publisher: name: Zenodo
Year: 2024

description: Maqola foliev kislota yetishmovchiligining homiladorlik davridagi salbiy ta'sirlarini, xususan, neyron naychasi nuqsonlari (NTD) va boshqa tug‘ma anomaliyalar bilan bog‘liqligini o‘rganadi. Tadqiqot Orolbo‘yi zonasida olib borilgan bo‘lib, bu hududda homilador ayollar orasida foliev kislota yetishmovchiligi yuqori darajada ekanligi aniqlangan. Maqolada foliev kislotasi yetishmovchiligini bartaraf etish uchun zarur bo‘lgan profilaktik choralar, jumladan, majburiy boyitish dasturlari va qo‘shimcha ravishda foliev kislotasi qabul qilishning ahamiyati ko‘rib chiqiladi. Tadqiqot natijalari foliev kislota yetishmovchiligini kamaytirish va sog‘liqni saqlash tizimida samarali profilaktika strategiyalarini ishlab chiqish uchun muhim asos yaratadi degan umiddamiz.
Probing domain wall dynamics in magnetic Weyl semimetals via the non-linear anomalous Hall effect
Creators: name: Heidari, Shiva
name: Asgari, Reza
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The magnetic textures of Weyl semimetals are embedded into their topological structure and interact dynamically with it. Here, we examine electric field-induced structural phase transitions in domain walls mediated by the spin transfer torque, and their footprint in charge transport. Remarkably, domain wall dynamics lead to a transient, local, non-linear anomalous Hall effect and non-linear anomalous drift current, which serve as direct probes of the magnetization dynamics and of the domain wall location. We discuss experimental observation in state-of-the-art samples.
description: 29 pages, 7 figures
Conformal Prediction: a Unified Review of Theory and New Challenges
Creators: name: Fontana, Matteo
name: Zeni, Gianluca
name: Vantini, Simone
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Econometrics (econ.EM)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: In this work we provide a review of basic ideas and novel developments about Conformal Prediction -- an innovative distribution-free, non-parametric forecasting method, based on minimal assumptions -- that is able to yield in a very straightforward way predictions sets that are valid in a statistical sense also in in the finite sample case. The in-depth discussion provided in the paper covers the theoretical underpinnings of Conformal Prediction, and then proceeds to list the more advanced developments and adaptations of the original idea.
description: forthcoming on Bernoulli
Acceleration of cosmic rays in presence of magnetohydrodynamic fluctuations at small scales
Creators: name: Kundu, Sayan
name: Singh, Nishant
name: Vaidya, Bhargav
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This work investigates the evolution of the distribution of charged particles due to the mechanism of stochastic turbulent acceleration (STA) in presence of small-scale turbulence with a mean magnetic field. STA is usually modelled as a biased random walk process in the momentum space of the non-thermal particles. This results in an advection-diffusion type transport equation for the non-thermal particle distribution function. Under quasilinear approximation, and by assuming turbulent spectra with power being available only in the sub-gyroscale range, we find that the Fokker-Planck diffusion coefficients $D_{γγ}$ and $D_{μμ}$ scale with the Lorentz factor $γ$ as: $D_{γγ}\proptoγ^{-2/3}$ and $D_{μμ}\proptoγ^{-8/3}$. We consider Alfvèn and fast waves in our calculations, and find a universal trend for the momentum diffusion coefficient irrespective of the properties of the small-scale turbulence. Such universality has already been reported regarding the spatial diffusion of the cosmic rays, and, here too, we observe a universality in the momentum diffusion coefficient. Furthermore, with the calculated transport coefficients, we numerically solve the advection-diffusion type transport equation for the non-thermal particles. We demonstrate the interplay of various mircophysical processes such as STA, synchrotron loss and particle escape on the particle distribution by systematically varying the parameters of the problem. We observe that the effect of the small-scale turbulence is more impactful for the high energy protons as compared to the electrons and such turbulence is capable of sustaining the energy of the protons from catastrophic radiative loss processes. Such a finding is novel and helps us to enhance our understanding about the hadronic emission processes that are typically considered as a competitor for the leptonic emission.
description: 23 pages (including Appendix), 11 figures, Accepted to be published in MNRAS main journal
Candid Colonialism
Creators: Ethan Reitz
Publisher: name: University of Alberta Library
Year: 2022

Canada, a nation-state founded on colonialism, “a form of structured dispossession,”

(Coulthard, 2014, p. 7) has made efforts to amend for harms caused to First Peoples by its racist

policies. Yet conflicts around Indigenous sovereignty continue to play out, often in remote

territories where mainstream media seldom ventures. At the same time, a resurgence of

Indigenous Nations has found expression in a movement to reoccupy traditional territories never

ceded to the state, revitalizing Indigenous relationships with the land and increasing the potential

for conflict with extractive industry. My Capstone Project examines these tensions through the

lens of communications and technology. First, I present a review of contemporary,

predominately Canadian, literature on the subject of conducting research ethically with

Indigenous communities in the evolving context of Indigenous resurgence and struggle for

sovereignty and decolonization in what is now known as Canada. Second, I present a case study

of strategic communications undertaken by land defenders of the Wet’suwet’en First Nation in

their struggle to stop Coastal GasLink from building a massive gas and oil pipeline through their

territory and under the Wedzin Kwa (Morice River) in which I use the methodology of

qualitative inductive analysis to identify some central themes in the data.
Phlegmariurus echinatus B. Ollg. 2012, comb. nov.
Creators: name: Øllgaard, Benjamin
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Lycopodiopsida
Lycopodiales
Lycopodiaceae
Phlegmariurus
Phlegmariurus echinatus

description: Phlegmariurus echinatus (Spring) B.Øllg., comb. nov.
 Basionym: Lycopodium echinatum Spring (1849: 24).
 Synonym: Huperzia echinata Trevisan (1874: 247).
description: Published as part of Øllgaard, Benjamin, 2012, New combinations in Neotropical Lycopodiaceae, pp. 10-22 in Phytotaxa 57 (1) on page 14, DOI: 10.11646/phytotaxa.57.1.3, http://zenodo.org/record/5061289
Phlegmariurus galapagensis B. Ollg. 2012, comb. nov.
Creators: name: Øllgaard, Benjamin
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Lycopodiopsida
Lycopodiales
Lycopodiaceae
Phlegmariurus
Phlegmariurus galapagensis

description: Phlegmariurus galapagensis (O.Hamann) B.Øllg., comb. nov.
 Basionym: Lycopodium setaceum Lamarck subsp. galapagense Hamann (1974: 252).
 Synonym: Huperzia galapagensis (Hamann) Holub (1985: 73).
description: Published as part of Øllgaard, Benjamin, 2012, New combinations in Neotropical Lycopodiaceae, pp. 10-22 in Phytotaxa 57 (1) on page 15, DOI: 10.11646/phytotaxa.57.1.3, http://zenodo.org/record/5061289
Investigating Vowel Harmony in Ihanzu
Creators: name: Nichols, Stephen
Publisher: name: Zenodo
Year: 2023
Subjects: Languages of Tanzania
Language Documentation and Description
Niger-Congo
Bantu
Ihanzu
Isanzu
Phonetics
Vowel Harmony

description: A talk on vowel harmony in Ihanzu, given at the Ihanzu Symposium 2023.
description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Nichols, Stephen. 2023. Investigating Vowel Harmony in Ihanzu. Talk given at the Ihanzu Symposium 2023, Bielefeld University, Germany. 29/09/2023.
Spin dynamics of hopping electrons in quantum wires: algebraic decay and noise
Creators: name: Shumilin, A. V.
name: Sherman, E. Ya.
name: Glazov, M. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study theoretically spin decoherence and intrinsic spin noise in semiconductor quantum wires caused by an interplay of electron hopping between the localized states and the hyperfine interaction of electron and nuclear spins. At a sufficiently low density of localization sites the hopping rates have an exponentially broad distribution. It allows the description of the spin dynamics in terms of closely-situated "pairs" of sites and single "reaching" states, from which the series of hops result in the electron localized inside a "pair". The developed analytical model and numerical simulations demonstrate disorder-dependent algebraic tails in the spin decay and power-law singularity-like features in the low-frequency part of the spin noise spectrum.
description: 5 pages, 3 figures + supplementary material
Rate-Induced Tipping to Metastable Zombie Fires
Creators: name: O'Sullivan, Eoin
name: Mulchrone, Kieran
name: Wieczorek, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Zombie fires in peatlands disappear from the surface, smoulder underground during the winter, and `come back to life' in the spring. They can release hundreds of megatonnes of carbon into the atmosphere per year and are believed to be caused by surface wildfires. Here, we propose rate-induced tipping (R-tipping) to a subsurface hot metastable state in bioactive peat soils as a main cause of Zombie fires. Our hypothesis is based on a conceptual soil-carbon model subjected to realistic changes in weather and climate patterns, including global warming scenarios and summer heatwaves. Mathematically speaking, R-tipping to the hot metastable state is a nonautonomous instability, due to crossing an elusive quasithreshold, in a multiple-timescale dynamical system. To explain this instability, we provide a framework combining a special compactification technique with concepts from geometric singular perturbation theory. This framework allows us to reduce an R-tipping problem due to crossing a quasithreshold to a heteroclinic orbit problem in a singular limit. We identify generic cases of tracking-tipping transitions via: (i) unfolding of a codimension-two heteroclinic folded saddle-node type-I singularity for global warming, and (ii) analysis of a codimension-one saddle-to-saddle hetroclinic orbit for summer heatwaves, in turn revealing new types of excitability quasithresholds.
description: 35 pages, 15 figures
The Morphology of Adverbial Expressions in Ihanzu
Creators: name: Bergner, Jennifer
Publisher: name: Zenodo
Year: 2023
Subjects: Languages of Tanzania
Language Documentation and Description
Niger-Congo
Bantu
Ihanzu
Isanzu
Adverbs

description: A talk on adverbial expressions, given at the Ihanzu Symposium 2023.
description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Bergner, Jennifer. 2023. The Morphology of Adverbial Expressions in Ihanzu. Talk given at the Ihanzu Symposium 2023, Bielefeld University, Germany. 29/09/2023.
Ray-Optics Simulations of Outdoor-to-Indoor Multipath Channels at 4 and 14 GHz
Creators: name: Koivumäki, Pasi
name: Karttunen, Aki
name: Haneda, Katsuyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Radio wave propagation simulations based on the ray-optical approximation have been widely adopted in coverage analysis for a range of situations, including the outdoor-to-indoor scenario. This work presents O2I ray-tracing simulations utilizing a complete office building floor plan in the form of a laser-scanned point cloud. The simulated radio channels are compared to their measured counterparts at 4 and 14 GHz in terms of path loss and delay and angular spreads. Validation of channel simulations for the O2I case is rare, and so far non-existent for above-$6$~GHz bands. This work reveals the importance of a floor plan model in accurately simulating the channel; it is confirmed that path loss can be replicated with a simple interior path loss model in place of a detailed building interior model, but neglecting to model the interior results in high delay and angular spread errors. By modeling the interior, the ray-tracing simulations achieve relative mean error of under 10% for delay and angular spreads. Finally, effects of multi-layer insulating window on propagation simulations are reported. Noticeable variation of the penetration loss on a small change of the incident angle of a propagation path causes large changes in estimated coverage.
One year in the Earth's magnetosphere: A global MHD simulation and spacecraft measurements
Creators: name: Facsko, G.
name: Honkonen, I.
name: Zivkovic, T.
name: Palin, L.
name: Kallio, E.
name: Agren, K.
name: Opgenoorth, H.
name: Tanskanen, E. I.
name: Milan, S. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The response of the Earth's magnetosphere to changing solar wind conditions are studied with a 3D Magnetohydrodynamic (MHD) model. One full year (155 Cluster orbits) of the Earth's magnetosphere is simulated using Grand Unified Magnetosphere Ionosphere Coupling simulation (GUMICS-4) magnetohydrodynamic code. Real solar wind measurements are given to the code as input to create the longest lasting global magnetohydrodynamics simulation to date. The applicability of the results of the simulation depends critically on the input parameters used in the model. Therefore, the validity and the variance of the OMNIWeb data is first investigated thoroughly using Cluster measurement close to the bow shock. The OMNIWeb and the Cluster data were found to correlate very well before the bow shock. The solar wind magnetic field and plasma parameters are not changed significantly from the $L_1$ Lagrange point to the foreshock, therefore the OMNIWeb data is appropriate input to the GUMICS-4. The Cluster SC3 footprints are determined by magnetic field mapping from the simulation results and the Tsyganenko (T96) model in order to compare two methods. The determined footprints are in rather good agreement with the T96. However, it was found that the footprints agree better in the northern hemisphere than the southern one during quiet conditions. If the By is not zero, the agreement of the GUMICS-4 and T96 footprint is worse in longitude in the southern hemisphere. Overall, the study implies that a 3D MHD model can increase our insight of the response of the magnetosphere to solar wind conditions.
description: Accepted for publication in Space Weather, http://onlinelibrary.wiley.com/doi/10.1002/2015SW001355/full
Compound Words Indicating Possession in Ihanzu
Creators: name: Classe, Friederike
Publisher: name: Zenodo
Year: 2023
Subjects: Languages of Tanzania
Language Documentation and Description
Niger-Congo
Bantu
Ihanzu
Isanzu
Morphology
Compounding

description: A talk on compound words indicating possession given at the Ihanzu Symposium 2023.
description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Classe, Friederike. 2023. Compound Words Indicating Possession in Ihanzu. Talk given at the Ihanzu Symposium 2023, Bielefeld University, Germany. 29/09/2023.
Massive Neutron Stars with Hadron-Quark Transition Core : phenomenological approach by "3-window model"
Creators: name: Takatsuka, Tatsuyuki
name: Masuda, Kota
name: Hatsuda, Tetsuo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: By a new approach introducing a "3-window model" and constructing phenomenologically an equation of state for the hadron-quark (HQ) transition region, possible maximum mass of neutron stars (NSs) is discussed. It is found that neutron stars (NSs) with HQ transition core are able to have a mass exceeding two-solar mass, consistent with massive NSs recently observed.
description: 3 pages, 1 figure
Spilomicrus sylvicola Masner 1991
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Spilomicrus
Spilomicrus sylvicola

description: Spilomicrus sylvicola Masner, 1991: 118, 153, figs 11-12, 37-39, 92, 116.
Valid name
Spilomicrus sylvicola Masner, 1991.
Summary of types
Paratype ♀.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on page 82, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Finding descending sequences through ill-founded linear orders
Creators: name: Goh, Jun Le
name: Pauly, Arno
name: Valenti, Manlio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: Logic in Computer Science (cs.LO)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 03D30 03D78 06A75

description: In this work we investigate the Weihrauch degree of the problem $\mathsf{DS}$ of finding an infinite descending sequence through a given ill-founded linear order, which is shared by the problem $\mathsf{BS}$ of finding a bad sequence through a given non-well quasi-order. We show that $\mathsf{DS}$, despite being hard to solve (it has computable inputs with no hyperarithmetic solution), is rather weak in terms of uniform computational strength. To make the latter precise, we introduce the notion of the deterministic part of a Weihrauch degree. We then generalize $\mathsf{DS}$ and $\mathsf{BS}$ by considering $\boldsymbolΓ$-presented orders, where $\boldsymbolΓ$ is a Borel pointclass or $\boldsymbolΔ^1_1$, $\boldsymbolΣ^1_1$, $\boldsymbolΠ^1_1$. We study the obtained $\mathsf{DS}$-hierarchy and $\mathsf{BS}$-hierarchy of problems in comparison with the (effective) Baire hierarchy and show that they do not collapse at any finite level.
description: Added errata. The problems $\mathsf{DS}$ and $\mathsf{BS}$ are not Weihrauch-equivalent, and the separation has been proved in arXiv:2401.11807. Please check the errata for the full list of changes
VUV spectroscopy of carbon dust analogs: contribution to interstellar extinction
Creators: name: Gavilan, L.
name: Alata, I.
name: Le, K. C.
name: Pino, T.
name: Giuliani, A.
name: Dartois, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A full spectral characterization of carbonaceous dust analogs is necessary to understand their potential as carriers of observed astronomical spectral signatures such as the ubiquitous UV bump at 217.5 nm and the far-ultraviolet (FUV) rise common to interstellar extinction curves. Our goal is to study the spectral properties of carbonaceous dust analogs from the FUV to the mid-infrared (MIR) domain. We seek in particular to understand the spectra of these materials in the FUV range, for which laboratory studies are scarce. We produced analogs to carbonaceous interstellar dust encountered in various phases of the interstellar medium: amorphous hydrogenated carbons (a-C:H), for carbonaceous dust observed in the diffuse interstellar medium, and soot particles, for the polyaromatic component. Analogs to a-C:H dust were produced using a radio-frequency plasma reactor at low pressures, and soot nanoparticles films were produced in an ethylene (C$_2$H$_4$) flame. We measured transmission spectra of these thin films (thickness < 100 nm) in the far-ultraviolet (190 - 250 nm) and in the vacuum-ultraviolet (VUV; 50 - 190 nm) regions using the APEX chamber at the DISCO beam line of the SOLEIL synchrotron radiation facility. These were also characterized through infrared microscopy at the SMIS beam line. We successfully measured the transmission spectra of these analogs from λ = 1 μm to 50 nm. From these, we extracted the laboratory optical constants via Kramers-Kronig inversion. We used these constants for comparison to existing interstellar extinction curves. We extend the spectral measurements of these types of carbonaceous analogs into the VUV and link the spectral features in this range to the 3.4 μm band. We suggest that these two materials might contribute to different classes of interstellar extinction curves.
description: 10 pages, 10 figures, accepted to Astronomy & Astrophysics on 13/11/2015
All order gravitational waveforms from scattering amplitudes
Creators: name: Adamo, Tim
name: Cristofoli, Andrea
name: Ilderton, Anton
name: Klisch, Sonja
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Waveforms are classical observables associated with any radiative physical process. Using scattering amplitudes, these are usually computed in a weak-field regime to some finite order in the post-Newtonian or post-Minkowskian approximation. Here, we use strong field amplitudes to compute the waveform produced in scattering of massive particles on gravitational plane waves, treated as exact nonlinear solutions of the vacuum Einstein equations. Notably, the waveform contains an infinite number of post-Minkowskian contributions, as well as tail effects. We also provide, and contrast with, analogous results in electromagnetism.
description: 16 pages + references, 1 figure. v2: added appendix on perturbative limits, published version
A Monte Carlo Method for 3D Radiative Transfer Equations with Multifractional Singular Kernels
Creators: name: Gomez, Christophe
name: Pinaud, Olivier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65C05, 74J20, 78A45, 85A25

description: We propose in this work a Monte Carlo method for three dimensional scalar radiative transfer equations with non-integrable, space-dependent scattering kernels. Such kernels typically account for long-range statistical features, and arise for instance in the context of wave propagation in turbulent atmosphere, geophysics, and medical imaging in the peaked-forward regime. In contrast to the classical case where the scattering cross section is integrable, which results in a non-zero mean free time, the latter here vanishes. This creates numerical difficulties as standard Monte Carlo methods based on a naive regularization exhibit large jump intensities and an increased computational cost. We propose a method inspired by the finance literature based on a small jumps - large jumps decomposition, allowing us to treat the small jumps efficiently and reduce the computational burden. We demonstrate the performance of the approach with numerical simulations and provide a complete error analysis. The multifractional terminology refers to the fact that the high frequency contribution of the scattering operator is a fractional Laplace-Beltrami operator on the unit sphere with space-dependent index.
description: 33 pages, 18 figures
Excited oscillons: cascading levels and higher multipoles
Creators: name: Wang, Yi-Jie
name: Xie, Qi-Xin
name: Zhou, Shuang-Yong
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Two types of excited oscillons are investigated. We first focus on spherical symmetry and find that there are a tower of spherical oscillons with higher energies. Despite having multiple approximate "nodes" in their energy density profiles, these oscillons are long-lived. We find that during the lifetime of a highly excited oscillon it will cascade down all the lower energy levels before its disintegration. We also point out the existence of excited oscillons with higher approximate multipoles, which generally have shorter lifespans than the spherical ones. Apart from performing nonlinear simulations with absorbing boundary conditions, we also apply a perturbative method to analyze some features of these excited oscillons.
description: 27 pages, 17 figures
Effective operators and their variational principles for discrete electrical network problems
Creators: name: Beard, Kenneth
name: Stefan, Anthony
name: Viator, Robert
name: Welters, Aaron
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: 15A06, 15A10, 15A63, 47A50, 47B02, 47B38, 47B65, 47B93, 49S05, 78A48

description: Using a Hilbert space framework inspired by the methods of orthogonal projections and Hodge decompositions, we study a general class of problems (called Z-problems) that arise in effective media theory, especially within the theory of composites, for defining the effective operator. A new and unified approach is developed, based on block operator methods, for obtaining solutions of the Z-problem, formulas for the effective operator in terms of the Schur complement, and associated variational principles (e.g., the Dirichlet and Thomson minimization principles) that lead to upper and lower bounds on the effective operator. In the case of finite-dimensional Hilbert spaces, this allows for a relaxation of the standard hypotheses on positivity and invertibility for the classes of operators usually considered in such problems, by replacing inverses with the Moore-Penrose pseudoinverse. As we develop the theory, we show how it applies to the classical example from the theory of composites on the effective conductivity in the periodic conductivity problem in the continuum (2d and 3d) under the standard hypotheses. After that, we consider the following three important and diverse examples of discrete electrical network problems in which our theory applies under the relaxed hypotheses. First, an operator-theoretic reformulation of the discrete Dirichlet-to-Neumann (DtN) map for an electrical network on a finite linear graph is given and used to relate the DtN map to the effective operator of an associated Z-problem.\ Second, we show how the classical effective conductivity of an electrical network on a finite linear graph is essentially the effective operator of an associated Z-problem. Finally, we consider electrical networks on periodic linear graphs and develop a discrete analog to classical example of the periodic conductivity equation and effective conductivity in the continuum.
description: 33 pages, 4 figures
An Application of Descriptive Set Theory to Complex Analysis
Creators: name: Caruvana, Christopher
name: Kallman, Robert R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 30H50, 54H05, 54H13

description: The purpose of this paper is to prove a new general result about rings of complex analytic functions. Let $Ω$ be an arbitrary nonempty open subset of the complex plane $\mathbb C$, $\mathcal{A}(Ω)$ be the set of holomorphic functions on $Ω$ viewed as a Polish ring (not a Polish algebra over $\mathbb C$) in the usual compact open topology, let $R$ be a Polish ring and let $φ: R \to \mathcal{A}(Ω)$ be an abstract algebraic isomorphism. The main goal of this paper is to prove Theorem 36 that $φ$ is a topological isomorphism. A special result of Bers is an easy corollary. Two additional items supplement these results, viz., that $B(\mathbb{D})$, the abstract ring of bounded analytic functions on the unit disk, cannot be made into a Polish ring and that $\mathcal{M}(Ω)$, the abstract field of meromorphic functions on $Ω$, cannot be made into a Polish field.
description: 19 pages
Left-Truncated Health Insurance Claims Data: Theoretical Review and Empirical Application
Creators: name: Weißbachm, Rafael
name: Dörre, Achim
name: Wied, Dominik
name: Doblhammer, Gabriele
name: Fink, Anne
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62N99

description: At the beginning of 2004, we draw a sample of size 0.25 million people from the inventory of the health insurer AOK. We followed their health claims until 2013. Our aim is the effect a stroke on the dementia onset probability, for Germans born in the first half of the 20$^{th}$ century. People deceased before 2004 are randomly left-truncated. Filtrations, modelling the missing data, enable to circumvent the unknown number of truncated persons by using a conditional instead of the full likelihood. Dementia onset after 2013 is a conditionally fixed right-censoring event. For each observed health history, Jacod's formula yields the conditional likelihood contribution. Asymptotic normality of the estimated intensities is derived, relative to a sample size definition that includes the truncated people. Yet, the standard error is observable. The claims data reveal that after a stroke, with time measured in years, the intensity of dementia onset increases from 0.02 to 0.07. Using the independence of the two estimated intensities, a 95\%-confidence interval for their difference is [0.050,0.056]. The effect halves, when we extend the analysis to an age-inhomogeneous model, but does not change further when we additionally adjust for multi-morbidity.
description: 56 pages, 8 figures
Fabrication of Metasurfaces on Building Construction Materials for Potential Electromagnetic Applications in the Microwave Band
Creators: name: Viskadourakis, Zacharias
name: Grammatikakis, Konstantinos
name: Katsara, Klytaimnistra
name: Drymiskianaki, Argyri
name: Kenanakis, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Energy self sufficiency, as well as optimal management of power in buildings is gaining importance, while obtaining power from traditional fossil energy sources is becoming more and more expensive. In this context, millimeter scale metasurfaces can be employed to harvest energy from microwave sources. They can also be used as sensors in the microwave regime for efficient power management solutions. In the current study, a simple spray printing method is proposed to develop metasurfaces in construction materials, i.e., plasterboard and wood. Such materials are used in the interior design of buildings; therefore, the implementation of metasurfaces in large areas, such as walls, doors and floors, is realized. The fabricated metasurfaces were characterized regarding their electromagnetic performance. It is hereby shown that the investigated metasurfaces exhibit an efficient electromagnetic response in the frequency range 4 to 7 GHz, depending on the MS. Thus, spray printed metasurfaces integrated on construction materials can potentially be used for electromagnetic applications, for buildings power self efficiency and management.
description: 14pages, 8 figures
Inflated Graph States Refuting Communication-Assisted LHV Models
Creators: name: Meyer, Uta Isabella
name: Grosshans, Frédéric
name: Markham, Damian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Standard Bell inequalities hold when distant parties are not allowed to communicate. Barrett et al. found correlations from Pauli measurements on certain network graphs refute a local hidden variable (LHV) description even allowing some communication along the graph. This has recently found applications in proving separation between classical and quantum computing, in terms of shallow circuits, and distributed computing. The correlations presented by Barrett et al. can be understood as coming from an extension of three party GHZ state correlations which can be embedded on a graph state. In this work, we propose systematic extensions of any graph state, which we dub inflated graph states such that they exhibit correlations which refute any communication assisted LHV model. We further show the smallest possible such example, with a 7-qubit linear graph state, as well as specially crafted smaller examples with 5 and 4 qubits. The latter is the smallest possible violation using binary inputs and outputs.
Electrical control of intervalley scattering in graphene via the charge state of defects
Creators: name: Yan, Baoming
name: Han, Qi
name: Jia, Zhenzhao
name: Niu, Jingjing
name: Cai, Tuocheng
name: Yu, Dapeng
name: Wu, Xiaosong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the intervalley scattering in defected graphene by low-temperature transport measurements. The scattering rate is strongly suppressed when defects are charged. This finding highlights "screening" of the short-range part of a potential by the long-range part. Experiments on calcium-adsorbed graphene confirm the role of a long-range Coulomb potential. This effect is applicable to other multivalley systems, provided that the charge state of a defect can be electrically tuned. Our result provides a means to electrically control valley relaxation and has important implications in valley dynamics in valleytronic materials.
description: 13 pages, 4 figures
Modified toric code models with flux attachment from Hopf algebra gauge theory
Creators: name: Conlon, Aaron
name: Pellegrino, Domenico
name: Slingerland, J. K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Kitaev's toric code is constructed using a finite gauge group from gauge theory. Such gauge theories can be generalized with the gauge group generalized to any finite-dimensional semisimple Hopf algebra. This also leads to generalizations of the toric code. Here we consider the simple case where the gauge group is unchanged but furnished with a non-trivial quasitriangular structure (R-matrix), which modifies the construction of the gauge theory. This leads to some interesting phenomena; for example, the space of functions on the group becomes a non-commutative algebra. We also obtain simple Hamiltonian models generalizing the toric code, which are of the same overall topological type as the toric code, except that the various species of particles created by string operators in the model are permuted in a way that depends on the R-matrix. In the case of $\mathbb{Z}_{N}$ gauge theory, we find that the introduction of a non-trivial R-matrix amounts to flux attachment.
description: 37 pages, 15 figures
Deliverable 4.2: ICT Architecture and data  requirements for HYPERGRYD DT PaaS
Creators: name: Jorge, Leao
name: Mikel, Borrás
name: Luís, Ibáñez
name: Sergio, Velásquez
name: Genís, Carrillo
Publisher: name: Zenodo
Year: 2024

description: The objective of this task is to define the ICT architecture underlying the Digital Twin Environment/Platform being provided by IDP and GSY, which will serve as the open scalable IoT-oriented data gathering infrastructure, when deployed over district components, including buildings, energy grids, energy production systems, etc. In addition, this task will specify data requirements from the different software tools to be integrated within the DTE in order to define stakeholders’ needs in terms of data inputs/outputs expected from respective tools and data exchange formats as well as protocols, turning out in specific needs for later ICT integration and API development (Task 4.6).
Ergebnisbericht zu den Gästebefragungen im Projekt AIR – Gesamtauswertung
Creators: name: Bergler, Marina
name: Niemeijer, Christiaan
name: Keller, Robert
Publisher: name: Zenodo
Year: 2024

description: Im Rahmen des Forschungsprojektes AIR – AI-basierter Recommender für nachhaltigen Tourismus – wurden Gästebefragungen in Form von Face to Face-Interviews in allen sechs Use Cases durchgeführt. Diese Form der Bedarfsanalyse soll dazu dienen, Informationen über die Demographie der Gäste, touristische Verhaltensmuster, Gründe für die Zielauswahl und Wahrnehmung des Zielgebiets und das Informationsverhalten zu erhalten. Die deskriptiven Ergebnisse der Befragungen sowie relevante Kreuzauswertungen werden in diesem Ergebnisbericht dargestellt.
Twenty Years of Precise Radial Velocities at Keck and Lick Observatories
Creators: name: Wright, Jason T
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The precise radial velocity survey at Keck Observatory began over 20 years ago. Its survey of thousands of stars now has the time baseline to be sensitive to planets with decade-long orbits, including Jupiter analogs. I present several newly-finished orbital solutions for long-period giant planets. Although hot Jupiters are generally "lonely" (i.e. they are not part of multiplanet systems), those that are not appear to often have giant companions at 5 AU or beyond. I present two of the highest period- ratios among planets in a two-planet system, and some of the longest orbital periods ever measured for exoplanets. In many cases, combining Keck radial velocities from those from other long-term surveys at Lick Observatory, McDonald Observatory, HARPS, and, of course, OHP spectrographs, produces superior orbital fits, constraining both period and eccentricity better than could be possible with any single set alone. Stellar magnetic activity cycles can masquerade as long-period planets. In most cases this effect is very small, but a loud minority of stars, including, apparently, HD 154345, show very strong RV-activity correlations.
description: 10 pages, 9 Figures and photos Video of talk here: http://interferometer.osupytheas.fr/colloques/OHP2015/videos/Jason_Wright.mp4 Conference program here: http://ohp2015.sciencesconf.org/resource/page/id/9, Edited by I. Boisse, O. Demangeon, F. Bouchy & L. Arnold
Shifted insertion algorithms for primed words
Creators: name: Marberg, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This article studies some new insertion algorithms that associate pairs of shifted tableaux to finite integer sequences in which certain terms may be primed. When primes are ignored in the input word these algorithms reduce to known correspondences, namely, a shifted form of Edelman-Greene insertion, Sagan-Worley insertion, and Haiman's shifted mixed insertion. These maps have the property that when the input word varies such that one output tableau is fixed, the other output tableau ranges over all (semi)standard tableaux of a given shape with no primed diagonal entries. Our algorithms have the same feature, but now with primes allowed on the main diagonal. One application of this is to give another Littlewood-Richardson rule for products of Schur $Q$-functions. It is hoped that there will exist set-valued generalizations of our bijections that can be used to understand products of $K$-theoretic Schur $Q$-functions.
description: 72 pages, 3 figures; v2: some additional results in section 3, section 5 migrated to arXiv:2108.12020, minor corrections; v3: major revision, extensive reorganization, many corrections, added exposition; v4: updated references, final version
Weak solutions of geometric flows associated to integro-differential harmonic maps
Creators: name: Schikorra, Armin
name: Sire, Yannick
name: Wang, Changyou
Publisher: name: arXiv
Year: 2015
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: The purpose of this note is to prove the existence of global weak solutions to the flow associated to integro-differential harmonic maps into spheres and Riemannian homogeneous manifolds.
Secure and Efficient Federated Learning Through Layering and Sharding Blockchain
Creators: name: Yuan, Shuo
name: Cao, Bin
name: Sun, Yao
name: Wan, Zhiguo
name: Peng, Mugen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Introducing blockchain into Federated Learning (FL) to build a trusted edge computing environment for transmission and learning has attracted widespread attention as a new decentralized learning pattern. However, traditional consensus mechanisms and architectures of blockchain systems face significant challenges in handling large-scale FL tasks, especially on Internet of Things (IoT) devices, due to their substantial resource consumption, limited transaction throughput, and complex communication requirements. To address these challenges, this paper proposes ChainFL, a novel two-layer blockchain-driven FL system. It splits the IoT network into multiple shards within the subchain layer, effectively reducing the scale of information exchange, and employs a Direct Acyclic Graph (DAG)-based mainchain as the mainchain layer, enabling parallel and asynchronous cross-shard validation. Furthermore, the FL procedure is customized to integrate deeply with blockchain technology, and a modified DAG consensus mechanism is designed to mitigate distortion caused by abnormal models. To provide a proof-of-concept implementation and evaluation, multiple subchains based on Hyperledger Fabric and a self-developed DAG-based mainchain are deployed. Extensive experiments demonstrate that ChainFL significantly surpasses conventional FL systems, showing up to a 14% improvement in training efficiency and a threefold increase in robustness.
description: Accepted by IEEE Transactions on Network Science and Engineering
OSSOS III - Resonant Trans-Neptunian Populations: Constraints from the first quarter of the Outer Solar System Origins Survey
Creators: name: Volk, Kathryn
name: Murray-Clay, Ruth
name: Gladman, Brett
name: Lawler, Samantha
name: Bannister, Michele T.
name: Kavelaars, J. J.
name: Petit, Jean-Marc
name: Gwyn, Stephen
name: Alexandersen, Mike
name: Chen, Ying-Tung
name: Lykawka, Patryk Sofia
name: Ip, Wing
name: Lin, Hsing Wen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The first two observational sky "blocks" of the Outer Solar System Origins Survey (OSSOS) have significantly increased the number of well-characterized observed trans-Neptunian objects (TNOs) in Neptune's mean motion resonances. We describe the 31 securely resonant TNOs detected by OSSOS so far, and we use them to independently verify the resonant population models from the Canada-France Ecliptic Plane Survey (CFEPS; Gladman et al. 2012), with which we find broad agreement. We confirm that the 5:2 resonance is more populated than models of the outer Solar System's dynamical history predict; our minimum population estimate shows that the high eccentricity (e>0.35) portion of the resonance is at least as populous as the 2:1 and possibly as populated as the 3:2 resonance. One OSSOS block was well-suited to detecting objects trapped at low libration amplitudes in Neptune's 3:2 resonance, a population of interest in testing the origins of resonant TNOs. We detected three 3:2 objects with libration amplitudes below the cutoff modeled by CFEPS; OSSOS thus offers new constraints on this distribution. The OSSOS detections confirm that the 2:1 resonance has a dynamically colder inclination distribution than either the 3:2 or 5:2 resonances. Using the combined OSSOS and CFEPS 2:1 detections, we constrain the fraction of 2:1 objects in the symmetric mode of libration to be 0.2-0.85; we also constrain the fraction of leading vs. trailing asymmetric librators, which has been theoretically predicted to vary depending on Neptune's migration history, to be 0.05-0.8. Future OSSOS blocks will improve these constraints.
description: Accepted for publication in AJ
TOI-179: a young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit
Creators: name: Desidera, S.
name: Damasso, M.
name: Gratton, R.
name: Benatti, S.
name: Nardiello, D.
name: D'Orazi, V.
name: Lanza, A. F.
name: Locci, D.
name: Marzari, F.
name: Mesa, D.
name: Messina, S.
name: Pillitteri, I.
name: Sozzetti, A.
name: Girard, J.
name: Maggio, A.
name: Micela, G.
name: Malavolta, L.
name: Nascimbeni, V.
name: Pinamonti, M.
name: Squicciarini, V.
name: Alcala, J.
name: Biazzo, K.
name: Bohn, A.
name: Bonavita, M.
name: Brooks, K.
name: Chauvin, G.
name: Covino, E.
name: Delorme, P.
name: Hagelberg, J.
name: Janson, M.
name: Lagrange, A. -M.
name: Lazzoni, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Transiting planets around young stars are key benchmarks for our understanding of planetary systems. One of such candidates was identified around the K dwarf HD 18599 by TESS, labeled as TOI-179. We present the confirmation of the transiting planet and the characterization of the host star and of the TOI-179 system over a broad range of angular separations. To this aim, we exploited the TESS photometric time series, intensive radial velocity monitoring performed with HARPS, and deep high-contrast imaging observations obtained with SPHERE and NACO at VLT. The inclusion of Gaussian processes regression analysis is effective to properly model the magnetic activity of the star and identify the Keplerian signature of the transiting planet. The star, with an age of 400+-100 Myr, is orbited by a transiting planet with period 4.137436 days, mass 24+-7 Mearth, radius 2.62 (+0.15-0.12) Rearth, and significant eccentricity (0.34 (+0.07-0.09)). Adaptive optics observations identified a low-mass companion at the boundary between brown dwarfs and very low mass stars (mass derived from luminosity 83 (+4-6) Mjup) at a very small projected separation (84.5 mas, 3.3 au at the distance of the star). Coupling the imaging detection with the long-term radial velocity trend and the astrometric signature, we constrained the orbit of the low mass companion, identifying two families of possible orbital solutions. The TOI-179 system represents a high-merit laboratory for our understanding of the physical evolution of planets and other low-mass objects and of how the planet properties are influenced by dynamical effects and interactions with the parent star.
description: 25 pages, 24 figures, A&A, in press
Quantum harmonic analysis on locally compact groups
Creators: name: Halvdansson, Simon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: On a locally compact group we introduce covariant quantization schemes and analogs of phase space representations as well as mixed-state localization operators. These generalize corresponding notions for the affine group and the Heisenberg group. The approach is based on associating to a square integrable representation of the locally compact group two types of convolutions between integrable functions and trace class operators. In the case of non-unimodular groups these convolutions only are well-defined for admissible operators, which is an extension of the notion of admissible wavelets as has been pointed out recently in the case of the affine group.
description: 39 pages, v2 fixed minor typos