cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
AI for Predictive Analytics in Retail: Enhancing Inventory Management and Customer Engagement
Creators: name: Researchscholar
Publisher: name: Zenodo
Year: 2025

description: Artificial Intelligence (AI) is rapidly transforming various industries, and retail is no exception. Predictive analyticspowered by AI is becoming a game-changer in the retail sector, especially when it comes to inventory management and customerengagement. By leveraging machine learning algorithms and big data, retailers can predict customer demand, optimize stocklevels, reduce waste, and improve overall operational efficiency. This paper explores the role of AI-driven predictive analytics inretail, focusing on its impact on inventory management and customer engagement. It discusses the underlying technologies, suchas machine learning and natural language processing, and highlights real-world applications where AI is revolutionizing retailoperations. Additionally, the paper examines the challenges retailers face in implementing AI technologies and provides insightsinto the future potential of AI in shaping the retail landscape.
Hydrodynamic interpretation of generic squeezed coherent states: A kinetic theory
Creators: name: Uzun, Nezihe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The hydrodynamic interpretation of quantum mechanics treats a system of particles in an effective manner. In this work, we investigate squeezed coherent states within the hydrodynamic interpretation. The Hamiltonian operator in question is time dependent, n-dimensional and in quadratic order. We start by deriving a phase space Wigner probability distribution and an associated equilibrium entropy for the squeezed coherent states. Then, we decompose the joint phase space distribution into two portions: a marginal position distribution and a momentum distribution that is conditioned on the post-selection of positions. Our conditionally averaged momenta are shown to be equal to the Bohm's momenta whose connection to the weak measurements is already known. We also keep track of the corresponding classical system evolution by identifying shear, magnification and rotation components of the symplectic phase space dynamics. This allows us to pinpoint which portion of the underlying classical motion appears in which quantum statistical concept. We show that our probability distributions satisfy the Fokker-Planck equations exactly. They can be used to decompose the equilibrium entropy into the missing information in positions and in momenta as in the Sackur-Tetrode entropy of the classical kinetic theory. Eventually, we define a quantum pressure, a quantum temperature and a quantum internal energy which are related to each other in the same fashion as in the classical kinetic theory. We show that the quantum potential incorporates the kinetic part of the internal energy and the fluctuations around it. This allows us to suggest a quantum conditional virial relation. In the end, we show that the kinetic internal energy is linked to the fractional Fourier transformer part of the underlying classical dynamics similar to the case where the energy of a quantum oscillator is linked to its Maslov index.
description: 27 pages, 1 figure
Positivity of the Veneziano Amplitude in $D=4$
Creators: name: Maity, Pronobesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Veneziano amplitude was put forward as a solution to the axioms of the S-matrix bootstrap. However, unitarity, reflected in the positivity of the coefficients in the Gegenbauer expansion of the amplitude is not obvious. In this note we compute the generating function of these coefficients in terms of the Appell hypergeometric function. We use this to read off an exact form of this coefficient on the leading Regge trajectory in $D=4$. We find that it decays with the spin but always remains positive. Since for large spin these coefficients are expected to be smaller than those on the subleading trajectories, our result indicates the positivity of the full Veneziano amplitude in $D=4$.
Glyptotendipes (Phytotendipes) pallens
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Glyptotendipes
Glyptotendipes pallens

description: Glyptotendipes (Phytotendipes) pallens (Meigen, 1804)
Notes
Morpho identification. First record for Lithuania (Pliūraitė and Kesminas 2004).
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
Evaluation of Two Complementary Modeling Approaches for Fiber-Reinforced Soft Actuators
Creators: name: Habibian, Soheil
name: Wheatley, Benjamin B.
name: Bae, Suehye
name: Shin, Joon
name: Buffinton, Keith W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Roboticists have been seeking to address this situation in recent years through the use of soft robots. Unfortunately, identifying appropriate models for the complete analysis and investigation of soft robots for design and control purposes can be problematic. This paper seeks to address this challenge by proposing two complementary modeling techniques for a particular type of soft robotic actuator known as a Fiber-Reinforced Elastomeric Enclosure (FREE). We propose that researchers can leverage multiple models to fill gaps in the understanding of the behavior of soft robots. We present and evaluate both a dynamic, lumped-parameter model and a finite element model to extend understanding of the practicability of FREEs in soft robotic applications. The results with the lumped-parameter model demonstrate that it predicts the actual rotational motion of a FREE with at most 4% error when a closed-loop controller is embedded in the system. Additionally, finite element analysis was used to study FREE design parameters as well as the workspace achieved with a module comprised of multiple FREEs. Our finite element results indicate that variations in the material properties of the elastic enclosure of a FREE are more significant than variations in fiber properties. Finally, finite element results show that a 30-degree difference in winding angle dramatically alters the shape of the workspace generated by four FREEs assembled into a module. Concludingly, comments are made about the relative advantages and limitations of lumped-parameter and finite element models of FREEs and FREE modules in providing useful insights into their behavior.
Rédei permutations with the same cycle structure
Creators: name: Capaverde, Juliane
name: Masuda, Ariane M.
name: Rodrigues, Virgínia M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Let $\mathbb{F}_q$ be the finite field of order $q$, and $\mathbb P^1(\mathbb{F}_q) = \mathbb F_q\cup \{\infty\}$. Write $(x+\sqrt y)^m$ as $N(x,y)+D(x,y)\sqrt{y}$. For $m\in\mathbb N$ and $a \in \mathbb{F}_q$, the Rédei function $R_{m,a}\colon \mathbb P^1(\mathbb F_q) \to \mathbb P^1(\mathbb F_q)$ is defined by $N(x,a)/D(x,a)$ if $D(x,a)\neq 0$ and $x\neq\infty$, and $\infty$, otherwise. In this paper we give a complete characterization of all pairs $(m,n)\in\mathbb N^2$ such that the Rédei permutations $R_{m,a}$ and $R_{n,b}$ have the same cycle structure when $a$ and $b$ have the same quadratic character and $q$ is odd. We explore some relationships between such pairs $(m,n)$, and provide explicit families of Rédei permutations with the same cycle structure. When a Rédei permutation has a unique cycle structure that is not shared by any other Rédei permutation, we call it isolated. We show that the only isolated Rédei permutations are the isolated Rédei involutions. Moreover, all our results can be transferred to bijections of the form $mx$ and $x^m$ on certain domains.
Glyptotendipes (Trichotendipes) signatus
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Glyptotendipes
Glyptotendipes signatus

description: Glyptotendipes (Trichotendipes) signatus (Kieffer, 1909)
Notes
Morpho identification. New record for Lithuania.
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
DAVLAT SEKTORIDA ICHKI AUDIT USLUBIYOTINI TAKOMILLASHTIRISH
Creators: name: Malikjonov, Davronbek
Publisher: name: Zenodo
Year: 2025

description: Mazkur ilmiy maqolada davlat sektorida ichki audit tizimini takomillashtirish muammolari va ularning yechimlari keng tahlil qilingan. Ichki audit davlat moliyaviy boshqaruvining ajralmas qismi bo‘lib, byudjet mablag‘laridan samarali foydalanish, shaffoflikni ta’minlash va korrupsiyaga qarshi kurashda muhim rol o‘ynaydi. Biroq, hozirgi kunda ko‘plab davlat idoralarida ichki audit tizimi samaradorligini oshirish zarurati mavjud. Maqolada ichki audit tizimining mavjud muammolari, jumladan, eskirgan uslubiyot, texnologik infratuzilmaning sust rivojlanishi, auditorlarning kasbiy malakasining yetarli emasligi va tashkiliy mustaqillikning cheklanganligi muhokama qilingan. Shuningdek, ushbu muammolarni bartaraf etish uchun xalqaro tajribani joriy etish, zamonaviy axborot texnologiyalaridan foydalanish, auditorlar malakasini oshirish va ichki audit mustaqilligini ta’minlash bo‘yicha amaliy tavsiyalar ishlab chiqilgan.
Novel constraints on neutrino physics beyond the standard model from the CONUS experiment
Creators: name: CONUS Collaboration
name: Bonet, H.
name: Bonhomme, A.
name: Buck, C.
name: Fülber, K.
name: Hakenmüller, J.
name: Heusser, G.
name: Hugle, T.
name: Lindner, M.
name: Maneschg, W.
name: Rink, T.
name: Strecker, H.
name: Wink, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The measurements of coherent elastic neutrino-nucleus scattering (CE$ν$NS) experiments have opened up the possibility to constrain neutrino physics beyond the standard model of elementary particle physics. Furthermore, by considering neutrino-electron scattering in the keV-energy region, it is possible to set additional limits on new physics processes. Here, we present constraints that are derived from CONUS germanium data on beyond the standard model (BSM) processes like tensor and vector non-standard interactions (NSIs) in the neutrino-quark sector, as well as light vector and scalar mediators. Thanks to the realized low background levels in the CONUS experiment at ionization energies below 1 keV, we are able to set the world's best limits on tensor NSIs from CE$ν$NS and constrain the scale of corresponding new physics to lie above 360 GeV. For vector NSIs, the derived limits strongly depend on the assumed ionization quenching factor within the detector material, since small quenching factors largely suppress potential signals for both, the expected standard model CE$ν$NS process and the vector NSIs. Furthermore, competitive limits on scalar and vector mediators are obtained from the CE$ν$NS channel at reactor-site which allow to probe coupling constants as low as $5\cdot10^{-5}$ of low mediator masses, assuming the currently favored quenching factor regime. The consideration of neutrino-electron scatterings allows to set even stronger constraints for mediator masses below $\sim1$ MeV and $\sim 10$ MeV for scalar and vector mediators, respectively.
description: 35 pages, 6 figures, 3 tables; v2: Figure 2 and further references added, other CE$\nu$NS limits included in result plots, matches published version in JHEP
Fermi surface expansion above critical temperature in a Hund ferromagnet
Creators: name: Nomura, Yusuke
name: Sakai, Shiro
name: Arita, Ryotaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using a cluster extension of the dynamical mean-field theory, we show that strongly correlated metals subject to Hund's physics exhibit significant electronic structure modulations above magnetic transition temperatures. In particular, in a ferromagnet having a large local moment due to Hund's coupling (Hund's ferromagnet), the Fermi surface expands even above the Curie temperature ($T_{\rm C}$) as if a spin polarization occurred. Behind this phenomenon, effective ``Hund's physics'' works in momentum space, originating from ferromagnetic fluctuations in the strong coupling regime. The resulting significantly momentum-dependent (spatially nonlocal) electron correlations induce an electronic structure reconstruction involving a Fermi-surface volume change and a redistribution of the momentum-space occupation. Our finding will give a deeper insight into the physics of Hund's ferromagnets above $T_{\rm C}$.
description: Main text: 6 pages, 4 figures. Supplemental Materials: 3 pages, 8 figures
Reinforcement Learning for Systematic FX Trading
Creators: name: Borrageiro, Gabriel
name: Firoozye, Nick
name: Barucca, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: We explore online inductive transfer learning, with a feature representation transfer from a radial basis function network formed of Gaussian mixture model hidden processing units to a direct, recurrent reinforcement learning agent. This agent is put to work in an experiment, trading the major spot market currency pairs, where we accurately account for transaction and funding costs. These sources of profit and loss, including the price trends that occur in the currency markets, are made available to the agent via a quadratic utility, who learns to target a position directly. We improve upon earlier work by targeting a risk position in an online transfer learning context. Our agent achieves an annualised portfolio information ratio of 0.52 with a compound return of 9.3\%, net of execution and funding cost, over a 7-year test set; this is despite forcing the model to trade at the close of the trading day at 5 pm EST when trading costs are statistically the most expensive.
Interaction-induced quantum spin Hall insulator in the organic Dirac electron system $α$-(BEDT-TSeF)$_2$I$_3$
Creators: name: Ohki, Daigo
name: Yoshimi, Kazuyoshi
name: Kobayashi, Akito
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Focusing on the recently-discovered candidate topological insulator $α$-(BEDT-TSeF)$_2$I$_3$ -- having two-dimensional charge-neutral Dirac cones in a low symmetry lattice -- we combine ab-initio and extended-Hubbard model calculations to deal with spin-orbit and non-local repulsive interactions, and find a realization of an interaction-induced quantum spin Hall (QSH) insulator, similar to the one proposed in the honeycomb lattice under next-nearest neighbor repulsions. In the absence of repulsive interactions, a topological insulator appears by the spin-orbit coupling and is characterized by a nonzero spin Chern number. By considering up to next-nearest neighbor repulsions at Hartree-Fock level, the intrinsic spin-orbit gap is found to grow by orders of magnitude and a QSH insulating phase appears that has both a finite spin Chern number and order parameter. Transport coefficients and spin susceptibility are calculated and found to consistently account for most of the experimental findings, including the metal-to-insulator crossover occurring at $\sim50$ K as well as the Berry phase change from 0 to $π$ under hydrostatic pressure. We argue that such a QSH insulating phase does not necessitate a sizeable spin-orbit interaction to generate a large insulating gap, which is highly advantageous for the search of novel topological phases in generic materials having low symmetry lattice and/or small spin-orbit coupling.
Harnischia fuscimanus Kieffer 1921
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Harnischia
Harnischia fuscimanus

description: Harnischia fuscimanus Kieffer, 1921
Notes
Morpho-molecular identification (GenBank ID: PQ 458113). First record for Lithuania (Pliūraitė 2001 a).
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
Supplementary document for A polarization tunable transmitted full-color display with enhanced switchability - 6213452.pdf
Creators: name: Gao, Xufeng
name: Wang, Qi
name: Zhang, Shijie
name: Hong, Ruijin
name: Zhang, Dawei
name: Zhuang, Songlin
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Clean revised manuscript
Excitons in Bulk and Layered Chromium Tri-Halides: From Frenkel to the Wannier-Mott Limit
Creators: name: Acharya, Swagata
name: Pashov, Dimitar
name: Rudenko, Alexander N.
name: Rösner, Malte
name: van Schilfgaarde, Mark
name: Katsnelson, Mikhail I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Excitons with large binding energies $\sim$2-3 eV in CrX$_{3}$ are historically characterized as being localized (Frenkel) excitons that emerge from the atomic $d{-}d$ transitions between the Cr-3$d$-$t_{2g}$ and $e_{g}$ orbitals. The argument has gathered strength in recent years as the excitons in recently made monolayers are found at almost the same energies as the bulk. The Laporte rule, which restricts such parity forbidden atomic transitions, can relax if, at least, one element is present: spin-orbit coupling, odd-parity phonons or Jahn-Teller distortion. While what can be classified as a purely Frenkel exciton is a matter of definition, we show using an advanced first principles parameter-free approach that these excitons in CrX$_{3}$, in both its bulk and monolayer variants, have band-origin and do not require the relaxation of Laporte rule as a fundamental principle. We show that, the character of these excitons is mostly determined by the Cr-$d$ orbital manifold, nevertheless, they appear only as a consequence of X-p states hybridizing with the Cr-$d$. The hybridization enhances as the halogen atom becomes heavier, bringing the X-$p$ states closer to the Cr-$d$ states in the sequence Cl{\textrightarrow}Br{\textrightarrow}I, with an attendant increase in exciton intensity and decrease in binding energy. By applying a range of different kinds of perturbations, we show that, moderate changes to the two-particle Hamiltonian that essentially modifies the Cr-$d$-X-$p$ hybridization, can alter both the intensities and positions of the exciton peaks. A detailed analysis of several deep lying excitons, with and without strain, reveals that the exciton is most Frenkel like in CrCl$_{3}$ and acquires mixed Frenkel-Wannier character in CrI$_{3}$.
description: 17 pages, 12 figures
Hidden quasiconservation laws in fracton hydrodynamics
Creators: name: Hart, Oliver
name: Lucas, Andrew
name: Nandkishore, Rahul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that the simplest universality classes of fracton hydrodynamics in more than one spatial dimension, including isotropic theories of charge and dipole conservation, can exhibit hidden "quasiconservation laws", in which certain higher multipole moments can only decay due to dangerously irrelevant corrections to hydrodynamics. We present two simple examples of this phenomenon. Firstly, an isotropic dipole-conserving fluid in the infinite plane conserves an infinite number of "harmonic multipole charges" within linear response; we calculate the decay or growth of these charges due to dangerously irrelevant nonlinearities. Secondly, we consider a model with $xy$ and $x^2-y^2$ quadrupole conservation, in addition to dipole conservation, which is described by isotropic fourth-order subdiffusion, yet has dangerously irrelevant sixth-order corrections necessary to relax the harmonic multipole charges. We confirm our predictions for the anomalously slow decay of the harmonic conserved charges in each setting by using numerical simulations, both of the nonlinear hydrodynamic differential equations, and in quantum automaton circuits on a square lattice.
description: 15 pages, 8 figures; v2 is published version
Microtendipes chloris
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Microtendipes
Microtendipes chloris

description: Microtendipes chloris (Meigen, 1818)
Notes
Morpho-molecular identification (GenBank ID: PQ 458117; PQ 458118; PQ 458119; PQ 458120; PQ 458121). First record for Lithuania (Grigelis 1999).
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
All you need is time to generalise the Goman-Khrabrov dynamic stall model
Creators: name: Ayancik, Fatma
name: Mulleners, Karen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Dynamic stall on airfoils negatively impacts their aerodynamic performance and can lead to structural damage. Accurate prediction and modelling of the dynamic stall loads are crucial for a more robust design of wings and blades that operate under unsteady conditions susceptible to dynamic stall and for widening the range of operation of these lifting surfaces. Many dynamic stall models rely on empirical parameters that need to be obtained from experimental or numerical data which limits their generalisability. Here, we introduce physically derived times scales to replace the empirical parameters in the Goman-Khrabrov dynamic stall model. The physics-based time constants correspond to the dynamic stall delay and the decay rate of post-stall load fluctuations. The dynamic stall delay is largely independent of the type of the motion, the Reynolds number, and the airfoil geometry and is described as a function of a normalised instantaneous pitch rate. The post-stall decay rate is independent of the motion kinematics and is directly related to the Strouhal number of the post-stall vortex shedding. The general validity of our physics-based time constants is demonstrated using three sets of experimental dynamic stall data covering various airfoil profiles, Reynolds numbers varying from 75'000 to 1'000'000, and sinusoidal and ramp-up pitching motions. The use of physics-based time constants generalises the Goman-Khrabrov dynamic stall model and extends its range of application.
Establishing the Non-Primordial Origin of Black Hole-Neutron Star Mergers
Creators: name: Sasaki, Misao
name: Takhistov, Volodymyr
name: Vardanyan, Valeri
name: Zhang, Ying-li
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Primordial black holes (PBHs) from the early Universe constitute an attractive dark matter candidate. First detections of black hole-neutron star (BH-NS) candidate gravitational wave events by the LIGO/Virgo collaboration, GW200105 and GW200115, already prompted speculations about non-astrophysical origin. We analyze, for the first time, the total volumetric merger rates of PBH-NS binaries formed via two-body gravitational scattering, finding them to be subdominant to the astrophysical BH-NS rates. In contrast to binary black holes, a significant fraction of which can be of primordial origin, either formed in dark matter halos or in the early Universe, PBH-NS rates cannot be significantly enhanced by contributions preceding star formation. Our findings imply that the identified BH-NS events are of astrophysical origin, even when PBH-PBH events significantly contribute to the GW observations.
description: 7 pages, 2 figures, published in APJ
Can Dynamic TDD Enabled Half-Duplex Cell-Free Massive MIMO Outperform Full-Duplex Cellular Massive MIMO?
Creators: name: Chowdhury, Anubhab
name: Chopra, Ribhu
name: Murthy, Chandra R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We consider a dynamic time division duplex (DTDD) enabled cell-free massive multiple-input multiple-output (CF-mMIMO) system, where each half-duplex (HD) access point (AP) is scheduled to operate in the uplink (UL) or downlink (DL) mode based on the data demands of the user equipments (UEs), with the goal of maximizing the sum UL-DL spectral efficiency (SE). We develop a new, low complexity, greedy algorithm for the combinatorial AP scheduling problem, with an optimality guarantee theoretically established via showing that a lower bound of the sum UL-DL SE is sub-modular. We also consider pilot sequence reuse among the UEs to limit the channel estimation overhead. In CF systems, all the APs estimate the channel from every UE, making pilot allocation problem different from the cellular case. We develop a novel algorithm that iteratively minimizes the maximum pilot contamination across the UEs. We compare the performance of our solutions, both theoretically and via simulations, against a full duplex (FD) multi-cell mMIMO system. Our results show that, due to the joint processing of the signals at the central processing unit, CF-mMIMO with dynamic HD AP-scheduling significantly outperforms cellular FD-mMIMO in terms of the sum SE and 90% likely SE. Thus, DTDD enabled HD CF-mMIMO is a promising alternative to cellular FD-mMIMO, without the cost of hardware for self-interference suppression.
description: Accepted, IEEE Transactions on Communications
The most energetically favorable configurations of hematite cube chains
Creators: name: Brics, Mārtiņš
name: Šints, Viesturs
name: Kitenbergs, Guntars
name: Cēbers, Andrejs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Hematite at room temperature is a weak ferromagnetic material. Its permanent magnetization is three orders smaller than for magnetite. Thus, hematite colloids allow us to explore a different physical range of particle interaction parameters compared to ordinary ferromagnetic particle colloids. In this paper we investigate a colloid consisting of hematite particles with cubic shape. We search for energetically favorable structures in an external magnetic field with analytical and numerical methods and molecular dynamics simulations and analyze whether it is possible to observe them in experiments. We find that energetically favorable configurations are observable only for short chains. Longer chains usually contain kinks which are formed in the process of chain formation due to the interplay of energy and thermal fluctuations as an individual cube can be in one of two alignments with an equal probability.
description: 14 pages, 22 figures
Scalar field dark matter with two components: combined approach from particle physics and cosmology
Creators: name: Gutiérrez-Luna, Eréndira
name: Carvente, Belen
name: Jaramillo, Víctor
name: Barranco, Juan
name: Escamilla-Rivera, Celia
name: Espinoza, Catalina
name: Mondragón, Myriam
name: Núñez, Darío
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we explore the possibility of incorporating particle physics motivated scalar fields to the dark matter cosmological model. In this landscape, we consider the classical complex scalar field in a certain region in the parameter space of the model that increases the number of neutrino species $N_{\mathrm{eff}}$, in order to be consistent with the observed abundance of light elements produced at Big Bang Nucleosynthesis (BBN). We perform analyses using one and two scalar fields. We examine the difference between these models and the priors considered at the edges of the cosmic ladder, this with the purpose of studying the impact of such models on the Hubble cosmic flow. In the two scalar field models we explore the possibility of combining an axion and a Higgs-like field as well as a Higgs-like field and the classical field, we show that in the first case there is no set of parameters that allows us to be consistent with $N_\mathrm{eff}$, while in the second case a strong restriction to the set of parameters is obtained. This last restriction is given in terms of a maximum bound of the fraction of Higgs-like field that can be incorporated together with the classical field. Our results could be relevant in the direct dark matter detection programs.
description: 18 pages, 5 figures. Discussion and references added, version accepted by PhysRevD
Low-overhead fault-tolerant quantum computing using long-range connectivity
Creators: name: Cohen, Lawrence Z.
name: Kim, Isaac H.
name: Bartlett, Stephen D.
name: Brown, Benjamin J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Vast numbers of qubits will be needed for large-scale quantum computing due to the overheads associated with error correction. We present a scheme for low-overhead fault-tolerant quantum computation based on quantum low-density parity-check (LDPC) codes, where long-range interactions enable many logical qubits to be encoded with a modest number of physical qubits. In our approach, logic gates operate via logical Pauli measurements that preserve both the protection of the LDPC codes as well as the low overheads in terms of the required number of additional qubits. Compared with surface codes with the same code distance, we estimate order-of-magnitude improvements in the overheads for processing around one hundred logical qubits using this approach. Given the high thresholds demonstrated by LDPC codes, our estimates suggest that fault-tolerant quantum computation at this scale may be achievable with a few thousand physical qubits at comparable error rates to what is needed for current approaches.
description: 14 pages, 6 figures, comments welcome; v2 - final author version, revisions made in response to referee reports
cleanTS: Automated (AutoML) Tool to Clean Univariate Time Series at Microscales
Creators: name: Shende, Mayur Kishor
name: Feijoo-Lorenzo, Andres E.
name: Bokde, Neeraj Dhanraj
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Data cleaning is one of the most important tasks in data analysis processes. One of the perennial challenges in data analytics is the detection and handling of non-valid data. Failing to do so can result in inaccurate analytics and unreliable decisions. The process of properly cleaning such data takes much time. Errors are prevalent in time series data. It is usually found that real world data is unclean and requires some pre-processing. The analysis of large amounts of data is difficult. This paper is intended to provide an easy to use and reliable system which automates the cleaning process of univariate time series data. Automating the process greatly reduces the time required. Visualizing a large amount of data at once is not very effective. To tackle this issue, an R package cleanTS is proposed. The proposed system provides a way to analyze data on different scales and resolutions. Also, it provides users with tools and a benchmark system for comparing various techniques used in data cleaning.
description: The cleanTS package is available in CRAN (https://cran.r-project.org/package=cleanTS)
Bridging microcombs and silicon photonic engines for optoelectronics systems
Creators: name: Shu, Haowen
name: Chang, Lin
name: Tao, Yuansheng
name: Shen, Bitao
name: Xie, Weiqiang
name: Jin, Ming
name: Netherton, Andrew
name: Tao, Zihan
name: Zhang, Xuguang
name: Chen, Ruixuan
name: Bai, Bowen
name: Qin, Jun
name: Yu, Shaohua
name: Wang, Xingjun
name: Bowers, John E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Microcombs have sparked a surge of applications over the last decade, ranging from optical communications to metrology. Despite their diverse deployment, most microcomb-based systems rely on a tremendous amount of bulk equipment to fulfill their desired functions, which is rather complicated, expensive and power-consuming. On the other hand, foundry-based silicon photonics (SiPh) has had remarkable success in providing versatile functionality in a scalable and low-cost manner, but its available chip-based light sources lack the capacity for parallelization, which limits the scope of SiPh applications. Here, we bridge these two technologies by using a power-efficient and operationally-simple AlGaAs on insulator microcomb source to drive CMOS SiPh engines. We present two important chip-scale photonic systems for optical data transmissions and microwave photonics respectively: The first microcomb-based integrated photonic data link is demonstrated, based on a pulse-amplitude 4-level modulation scheme with 2 Tbps aggregate rate, and a highly reconfigurable microwave photonic filter with unprecedented integration level is constructed, using a time stretch scheme. Such synergy of microcomb and SiPh integrated components is an essential step towards the next generation of fully integrated photonic systems.
description: 10 pages, 4 figures
Emoji-based Co-attention Network for Microblog Sentiment Analysis
Creators: name: Yuan, Xiaowei
name: Hu, Jingyuan
name: Zhang, Xiaodan
name: Lv, Honglei
name: Liu, Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Emojis are widely used in online social networks to express emotions, attitudes, and opinions. As emotional-oriented characters, emojis can be modeled as important features of emotions towards the recipient or subject for sentiment analysis. However, existing methods mainly take emojis as heuristic information that fails to resolve the problem of ambiguity noise. Recent researches have utilized emojis as an independent input to classify text sentiment but they ignore the emotional impact of the interaction between text and emojis. It results that the emotional semantics of emojis cannot be fully explored. In this paper, we propose an emoji-based co-attention network that learns the mutual emotional semantics between text and emojis on microblogs. Our model adopts the co-attention mechanism based on bidirectional long short-term memory incorporating the text and emojis, and integrates a squeeze-and-excitation block in a convolutional neural network classifier to increase its sensitivity to emotional semantic features. Experimental results show that the proposed method can significantly outperform several baselines for sentiment analysis on short texts of social media.
description: There are technical details that need to be changed, and the replacement version will take time to complete
Microtendipes pedellus
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Microtendipes
Microtendipes pedellus

description: Microtendipes pedellus (De Geer, 1776)
Notes
Morpho-molecular identification (GenBank ID: PQ 458122; PQ 458123; PQ 458124; PQ 458125; PQ 458126; PQ 458127). First record for Lithuania (Grigelis 1999).
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
D4.8: QCCC Gamma
Creators: name: Sennane, Wassil
Publisher: name: Zenodo
Year: 2024

description: The software described in this document allows for the calculation of the ground state energy of a graphene+CO2 system by using the variational quantum eigensolver (VQE). Such as in the D4.2-QCCC alpha report (Sennane & Rancic, 2022a), two types of quantum computing ansatze are implemented (the hardware efficient one and the qUCCSD), although this report particularly focuses on VQE+qUCCSD. The code supports noisy simulations, modification of size and deformation of the graphene sheet as well as modifying the orientation of CO2 molecule. The code is available on Github : https://github.com/NEASQC/D4.8.
Supplementary document for On Similarity Metrics Evaluating Performance of Mode Decomposition in Few-Mode Optical Fibers - 6214246.pdf
Creators: name: Anisimov, Pavel
name: Tsyplakov, Evgeny
name: Zemlyakov, Viacheslav
name: Gao, Jiexing
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental Document
Regular braneworlds with bulk fluids
Creators: name: Antoniadis, Ignatios
name: Cotsakis, Spiros
name: Klaoudatou, Ifigeneia
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We review studies on the singularity structure and asymptotic analysis of a 3-brane (flat or curved) embedded in a five-dimensional bulk filled with a `perfect fluid' with an equation of state with the `pressure' and the `density' of the fluid depending on the fifth space coordinate. Regular solutions satisfying positive energy conditions in the bulk exist only in the cases of a flat brane with an EoS parameter equal to -1, or of AdS branes for EoS parameter values in suitable intervals. More cases can be found by gluing two regular branches of solutions at the position of the brane. However, only the case of a flat brane with an EoS parameter equal to -1 leads to finite Planck mass on the brane and thus localises gravity. In a more recent work, we showed that a way to rectify the previous findings and obtain a solution for a flat brane in a finite range of the EoS parameter, which is both free from finite-distance singularities and compatible with the physical conditions of energy and finiteness of four-dimensional Planck mass, is by introducing a bulk fluid component that satisfies a nonlinear equation of state.
description: 37 pages, 6 figures
Microtendipes rydalensis
Creators: name: Stasiukynas, Laurynas
name: Laurindo da Silva, Fabio
name: Havelka, Jekaterina
name: Podėnas, Sigitas
name: Lekoveckaitė, Aistė
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Microtendipes
Microtendipes rydalensis

description: Microtendipes rydalensis (Edwards, 1929)
Notes
Morpho-molecular identification (GenBank ID: PQ 458128). New record for Lithuania.
description: Published as part of Stasiukynas, Laurynas, Laurindo da Silva, Fabio, Havelka, Jekaterina, Podėnas, Sigitas & Lekoveckaitė, Aistė, 2024, Chironomidae (Diptera) of the Šventoji and Žeimena sub-basins in Lithuania, pp. e 130218 in Biodiversity Data Journal 12 on page e130218, DOI: 10.3897/BDJ.12.e130218
Mumford-Shah regularization in electrical impedance tomography with complete electrode model
Creators: name: Jauhiainen, Jyrki
name: Seppänen, Aku
name: Valkonen, Tuomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 65K10 (Primary), 35R30, 68U10, 35Q93 (Secondary)

description: In electrical impedance tomography, we aim to solve the conductivity within a target body through electrical measurements made on the surface of the target. This inverse conductivity problem is severely ill-posed, especially in real applications with only partial boundary data available. Thus regularization has to be introduced. Conventionally regularization promoting smooth features is used, however, the Mumford--Shah regularizer familiar for image segmentation is more appropriate for targets consisting of several distinct objects or materials. It is, however, numerically challenging. We show theoretically through $Γ$-convergence that a modification of the Ambrosio--Tortorelli approximation of the Mumford--Shah regularizer is applicable to electrical impedance tomography, in particular the complete electrode model of boundary measurements. With numerical and experimental studies, we confirm that this functional works in practice and produces higher quality results than typical regularizations employed in electrical impedance tomography when the conductivity of the target consists of distinct smoothly-varying regions.
description: 28 pages, 7 figures
THE ROLE AND IMPORTANCE OF AI-BASED EDUCATIONAL SOFTWARE IN THE LEARNING PROCESS
Creators: name: Urinbayeva, Gulnaz
name: Aybosinova, Gulmira
Publisher: name: Zenodo
Year: 2025

description: The rapid development of artificial intelligence (AI) has significantly influenced various fields, including education. AI-based educational software plays a crucial role in enhancing the learning process by providing personalized learning experiences, automating administrative tasks, and offering intelligent tutoring systems. This article explores the importance of AI-driven educational tools in modern learning environments, discussing their advantages, challenges, and future prospects. Moreover, different types of AI-based software and their practical applications in education are analyzed.
Quasiparticle trapping at vortices producing Josephson supercurrent enhancement
Creators: name: Sato, Yosuke
name: Ueda, Kento
name: Takeshige, Yuusuke
name: Kamata, Hiroshi
name: Li, Kan
name: Samuelson, Lars
name: Xu, Hongqi
name: Matsuo, Sadashige
name: Tarucha, Seigo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Josephson junction of a strong spin-orbit material under a magnetic field is a promising Majorana fermion candidate. Supercurrent enhancement by a magnetic field has been observed in the InAs nanowire Josephson junctions and assigned to a topological transition. In this work we observe a similar phenomenon but discuss the non-topological origin by considering trapping of quasiparticles by vortices that penetrate the superconductor under a finite magnetic field. This assignment is supported by the observed hysteresis of the switching current when sweeping up and down the magnetic field. Our experiment shows the importance of quasiparticles in superconducting devices with a magnetic field, which can provide important insights for the design of quantum qubits using superconductors.
description: 10 pages, 8 figures
A Recommendation System to Enhance Midwives' Capacities in Low-Income Countries
Creators: name: Guitart, Anna
name: Heydari, Afsaneh
name: Olaleye, Eniola
name: Ljubicic, Jelena
name: del Río, Ana Fernández
name: Periáñez, África
name: Bellhouse, Lauren
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Maternal and child mortality is a public health problem that disproportionately affects low- and middle-income countries. Every day, 800 women and 6,700 newborns die from complications related to pregnancy or childbirth. And for every maternal death, about 20 women suffer serious birth injuries. However, nearly all of these deaths and negative health outcomes are preventable. Midwives are key to revert this situation, and thus it is essential to strengthen their capacities and the quality of their education. This is the aim of the Safe Delivery App, a digital job aid and learning tool to enhance the knowledge, confidence and skills of health practitioners. Here, we use the behavioral logs of the App to implement a recommendation system that presents each midwife with suitable contents to continue gaining expertise. We focus on predicting the click-through rate, the probability that a given user will click on a recommended content. We evaluate four deep learning models and show that all of them produce highly accurate predictions.
Underwater metamaterial absorber with impedance-matched composite
Creators: name: Qu, Sichao
name: Gao, Nan
name: Tinel, Alain
name: Morvan, Bruno
name: Romero-García, Vicente
name: Groby, Jean-Philippe
name: Sheng, Ping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: By using a structured tungsten-polyurethane composite that is impedance-matched to water while simultaneously having a much slower longitudinal sound speed, we have theoretically designed, and experimentally realized, an underwater acoustic absorber exhibiting high absorption from 4 to 20 kHz, measured in a 5.6m times 3.6m water pool with the time-domain approach. The broadband functionality is achieved by optimally engineering the distribution of the Fabry-Perot resonances, based on an integration scheme, to attain impedance matching over a broad frequency range. The average thickness of the integrated absorber, 8.9 mm, is in the deep subwavelength regime (~λ/42 at 4 kHz) and close to the causal minimum thickness of 8.2 mm that is evaluated from the simulated absorption spectrum. The structured composite represents a new type of acoustic metamaterials that has high acoustic energy density and promises broad underwater applications.