cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Radio-frequency reflectometry in bilayer graphene devices utilizing micro graphite back-gates
Creators: name: Johmen, Tomoya
name: Shinozaki, Motoya
name: Fujiwara, Yoshihiro
name: Aizawa, Takumi
name: Otsuka, Tomohiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Bilayer graphene is an attractive material that realizes high-quality two-dimensional electron gas with a controllable bandgap. By utilizing the bandgap, electrical gate tuning of the carrier is possible and formation of nanostructures such as quantum dots have been reported. To probe the dynamics of the electronics states and realize applications for quantum bit devices, RF-reflectometry which enables high-speed electric measurements is important. Here we demonstrate RF-reflectometry in bilayer graphene devices. We utilize a micro graphite back-gate and an undoped Si substrate to reduce the parasitic capacitance which degrades the RF-reflectometry. We measure the resonance properties of a tank circuit which contains the bilayer graphene device. We form RF-reflectmetory setup and compared the result with the DC measurement, and confirmed their consistency. We also measure Coulomb diamonds of quantum dots possibly formed by bubbles and confirm that RF-reflectometry of quantum dots can be performed. This technique enables high-speed measurements of bilayer graphene quantum dots and contributes to the research of bilayer graphene-based quantum devices by fast readout of the states.
description: 16 pages, 5 figures
Derivations and homomorphisms in commutator-simple algebras
Creators: name: Alaminos, J.
name: Brešar, M.
name: Extremera, J.
name: Godoy, M. L. C.
name: Villena, A. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 43A20, 47L10, 16W20, 16W25

description: We call an algebra $A$ commutator-simple if $[A,A]$ does not contain nonzero ideals of $A$. After providing several examples, we show that in these algebras derivations are determined by a condition that is applicable to the study of local derivations. This enables us to prove that every continuous local derivation $D\colon L^1(G)\to L^1(G)$, where $G$ is a unimodular locally compact group, is a derivation. We also give some remarks on homomorphism-like maps in commutator-simple algebras.
Landau Levels in graphene in the presence of emergent gravity
Creators: name: Khaidukov, Z. V.
name: Zubkov, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider graphene in the presence of external magnetic field and elastic deformations that cause emergent magnetic field. The total magnetic field results in the appearance of Landau levels in the spectrum of quasiparticles. In addition, the quasiparticles in graphene experience the emergent gravity. We consider the particular choice of elastic deformation, which gives constant emergent magnetic field and vanishing torsion. Emergent gravity may be considered as perturbation. We demonstrate that the corresponding first order approximation affects the energies of the Landau levels only through the constant renormalization of Fermi velocity. The degeneracy of each Landau level receives correction, which depends essentially on the geometry of the sample. There is the limiting case of the considered elastic deformation, that corresponds to the uniformly stretched graphene. In this case in the presence of the external magnetic field the degeneracies of the Landau levels remain unchanged.
description: Latex, 12 pages
Ion acceleration with few cycle relativistic laser pulses from foil targets
Creators: name: Ter-Avetisyan, Sargis
name: Varmazyar, Parvin
name: Singh, Prashant K.
name: Son, Joon-Gon
name: Fule, Miklos
name: Bychenkov, Valery Yu.
name: Farkas, Balazs
name: Nelissen, Kwinten
name: Mondal, Sudipta
name: Papp, Daniel
name: Borzsonyi, Adam
name: Csontos, Janos
name: Lecz, Zsolt
name: Somoskoi, Tamas
name: Toth, Laszlo
name: Toth, Szabolcs
name: Andriy, Velyhan
name: Margarone, Daniele
name: Necas, Ales
name: Tajima, Toshiki
name: Mourou, Gerard
name: Szabo, Gabor
name: Osvay, Karoly
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Ion acceleration resulting from the interaction of 11 fs laser pulses of ~35 mJ energy with ultrahigh contrast (<10^-10), and 10^19 W/cm^2 peak intensity with foil targets made of various materials and thicknesses at normal (0-degree) and 45-degree laser incidence is investigated. The maximum energy of the protons accelerated from both the rear and front sides of the target was above 1 MeV. A conversion efficiency from laser pulse energy to proton beam is estimated to be as high as ~1.4 % at 45-degree laser incidence using a 51 nm-thick Al target. The excellent laser contrast indicates the predominance of vacuum heating via the Brunels effect as an absorption mechanism involving a tiny pre-plasma of natural origin due to the Gaussian temporal laser pulse shape. Experimental results are in reasonable agreement with theoretical estimates where proton acceleration from the target rear into the forward direction is well explained by a TNSA-like mechanism, while proton acceleration from the target front into the backward direction can be explained by the formation of a charged cavity in a tiny pre-plasma. The exploding Coulomb field from the charged cavity also serves as a source for forward-accelerated ions at thick targets.
description: 12 pages, 7 figures,
Termitopria sheasbyi Muesebeck 1965
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Termitopria
Termitopria sheasbyi

description: Termitopria sheasbyi Muesebeck, 1965: 190, fig. 1a-e.
Valid name
Termitopria sheasbyi Muesebeck, 1965.
Summary of types
Paratypes 4 ♀♀.
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 84, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
The Spillover of Parenting Stress Onto Marital Qualities and Communication During Parenting Disagreements: A Relational Turbulence Theory Perspective
Creators: name: Brisini, Kellie St.Cyr
name: Taylor, Samuel Hardman
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: This study engages relational turbulence theory to examine relationship functioning and communication among parents of teenagers. The hypotheses assessed associations between relational uncertainty and disrupted interdependence, and communication during conflict episodes related to childrearing, and considered parenting stress and coparenting alliance as antecedents of relationship parameters. Married, parents of teen children (n = 349) reported their relationship experiences, parenting stress, and coparenting alliance. Then, parents recalled a recent disagreement with their spouse related to their teen and reported their communication tactics during the conversation. The results suggested that parenting stress was positively associated with relational uncertainty and interference from a partner, which in turn, predicted more negative conflict communication. Coparenting alliance was negatively associated with relational uncertainty and partner interference, and positively associated with facilitation from a partner. Parenting stress attenuated the relationship between coparenting alliance and relationship parameters. Implications for relational turbulence theory, family scholars, and parents of teens are discussed.
Stabilization and improvement of a promising influenza antiviral: Making a PAIN PAINless
Creators: name: Antanasijevic, Aleksandar
name: Hafeman, Nicholas J.
name: Tundup, Smanla
name: Kingsley, Carolyn
name: Mishra, Rama K.
name: Rong, Lijun
name: Manicassamy, Balaji
name: Wardrop, Duncan
name: Caffrey, Michael
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: The viral envelope protein hemagglutinin (HA) plays a critical role in influenza entry and thus is an attractive target for novel therapeutics. The small molecule tert-butylhydroquinone (TBHQ) has previously been shown to bind to HA and inhibit HA-mediated entry with low micromolar potency. However, enthusiasm for the use of TBHQ has diminished due to the compound's antioxidant properties. In this work we show that the antioxidant properties of TBHQ are not responsible for the inhibition of HA-mediated entry. In addition, we have performed a structure-activity relationship (SAR) analysis of TBHQ derivatives. We find that the most promising compound, 3-Tert-butyl-4-methoxyphenol, exhibits enhanced potency (IC50 = 0.6 μM), decreased toxicity (CC50 = 340 μM), and increased stability (t1/2 < 48 h). Finally, we have characterized the binding properties of 3-Tert-butyl-4-methoxyphenol using NMR and molecular dynamics to guide future efforts for chemical optimization.
Neutron Zeeman beam-splitting for the investigation of magnetic nanostructures
Creators: name: Kozhevnikov, S. V.
name: Ott, F.
name: Semenova, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Zeeman spatial splitting of a neutron beam takes place during a neutron spin-flip in magnetically non-collinear systems at grazing incidence geometry. We apply the neutron beam-splitting method for the investigation of magnetically non-collinear clusters of submicron size in a thin film. The experimental results are compared with ones obtained by other methods.
description: 11 pages, 9 figures
Wilson operator algebras and ground states for coupled BF theories
Creators: name: Tiwari, Apoorv
name: Chen, Xiao
name: Ryu, Shinsei
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The multi-flavor $BF$ theories in (3+1) dimensions with cubic or quartic coupling are the simplest topological quantum field theories that can describe fractional braiding statistics between loop-like topological excitations (three-loop or four-loop braiding statistics). In this paper, by canonically quantizing these theories, we study the algebra of Wilson loop and Wilson surface operators, and multiplets of ground states on three torus. In particular, by quantizing these coupled $BF$ theories on the three-torus, we explicitly calculate the $\mathcal{S}$- and $\mathcal{T}$-matrices, which encode fractional braiding statistics and topological spin of loop-like excitations, respectively. In the coupled $BF$ theories with cubic and quartic coupling, the Hopf link and Borromean ring of loop excitations, together with point-like excitations, form composite particles.
description: 20 pages, 3 figures
Text writing in the air
Creators: name: Beg, Saira
name: Khan, M. Fahad
name: Baig, Faisal
Publisher: name: arXiv
Year: 2016
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences
subject: C.3
subject: 68T10

description: This paper presents a real time video based pointing method which allows sketching and writing of English text over air in front of mobile camera. Proposed method have two main tasks: first it track the colored finger tip in the video frames and then apply English OCR over plotted images in order to recognize the written characters. Moreover, proposed method provides a natural human-system interaction in such way that it do not require keypad, stylus, pen or glove etc for character input. For the experiments, we have developed an application using OpenCv with JAVA language. We tested the proposed method on Samsung Galaxy3 android mobile. Results show that proposed algorithm gains the average accuracy of 92.083% when tested for different shaped alphabets. Here, more than 3000 different Magnetic 3D shaped characters were used [Ref: http://learnrnd.com/news.php?id=Magnetic_3D_Bio_Printing]. Our proposed system is the software based approach and relevantly very simple, fast and easy. It does not require sensors or any hardware rather than camera and red tape. Moreover, proposed methodology can be applicable for all disconnected languages but having one issue that it is color sensitive in such a way that existence of any red color in the background before starting the character writing can lead to false results.
description: 19 pages, 19 figures,2 tables. see http://www.tandfonline.com/doi/abs/10.1080/15980316.2013.860928?journalCode=tjid20
Temporally adaptive monitoring procedures with applications in enterprise cyber-security
Creators: name: Riddle-Workman, Elizabeth
Publisher: name: Imperial College London
Year: 2022

description: Due to the perpetual threat of cyber-attacks, enterprises must employ and develop new methods of detection as attack vectors evolve and advance. Enterprise computer networks produce a large volume and variety of data including univariate data streams, time series and network graph streams. Motivated by cyber-security, this thesis develops adaptive monitoring tools for univariate and network graph data streams, however, they are not limited to this domain. In all domains, real data streams present several challenges for monitoring including trend, periodicity and change points. Streams often also have high volume and frequency. To deal with the non-stationarity in the data, the methods applied must be adaptive. Adaptability in the proposed procedures throughout the thesis is introduced using forgetting factors, weighting the data accordingly to recency. Secondly, methods applied must be computationally fast with a small or fixed computation burden and fixed storage requirements for timely processing. Throughout this thesis, sequential or sliding window approaches are employed to achieve this. The first part of the thesis is centred around univariate monitoring procedures. A sequential adaptive parameter estimator is proposed using a Bayesian framework. This procedure is then extended for multiple change point detection, where, unlike existing change point procedures, the proposed method is capable of detecting abrupt changes in the presence of trend. We additionally present a time series model which combines short-term and long-term behaviours of a series for improved anomaly detection. Unlike existing methods which primarily focus on point anomalies detection (extreme outliers), our method is capable of also detecting contextual anomalies, when the data deviates from persistent patterns of the series such as seasonality. Finally, a novel multi-type relational clustering methodology is proposed. As multiple relations exist between the different entities within a network (computers, users and ports), multiple network graphs can be generated. We propose simultaneously clustering over all graphs to produce a single clustering for each entity using Non-Negative Matrix Tri-Factorisation. Through simplifications, the proposed procedure is fast and scalable for large network graphs. Additionally, this methodology is extended for graph streams. This thesis provides an assortment of tools for enterprise network monitoring with a focus on adaptability and scalability making them suitable for intrusion detection and situational awareness.
The Myth of URANS
Creators: name: Israel, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Since the 1990s, RANS practitioners have observed spontaneous unsteadiness in RANS simulations. Some have suggested deliberately using this as a method of resolving large turbulent structures. However, to date, no one has produced a theoretical justification for this unsteady RANS (URANS) approach. Here, we extend the dynamical systems fixed point analysis of Speziale and Mhuiris (1989), Girimaji et al. (2006) to create a theoretical model for URANS dynamics. The results are compared to URANS simulations for homogeneous isotropic decaying turbulence. The model shows that URANS can predict incorrect decay rates and that the solution tends towards steady RANS over time. Similar analysis for forced turbulence shows a fixed modeled energy of about 30% of total energy, regardless of the model parameters. The same analysis can be used to show how hybrid type models can begin to address these issues.
description: 23 pages, 10 figures, submitted to Journal of Turbulence
Effects of environment correlations on the onset of collective decay in waveguide QED
Creators: name: Del Ángel, Alberto
name: Solano, P.
name: Barberis-Blostein, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We calculate the dynamics of one and two two-level atoms interacting with the electromagnetic vacuum field in the vicinity of an optical nanofiber without making either the Born or the Markov approximations. We use a constant dielectric function and the Drude-Lorentz model, observing deviations from the standard super- and sub-radiant decays. Despite the non-trivial environment correlations, we discuss the validity of approximating the speed of atom-atom communication to the group velocity of the guided field. Our work presents a deeper understanding of the validity of commonly used approximations in recent platforms for quantum optics applications in the context of waveguide QED.
description: 10 pages, 17 figures
Classification and Decomposition of Quaternionic Projective Transformations
Creators: name: Dutta, Sandipan
name: Gongopadhyay, Krishnendu
name: Lohan, Tejbir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary 53A20, Secondary 51M10, 20E45, 15B33 [2020]

description: We consider the projective linear group $\mathrm{PSL}(3,\mathbb{H})$. We have investigated the reversibility problem in this group and use the reversibility to offer an algebraic characterization of the dynamical types of $\mathrm{PSL}(3,\mathbb{H})$. We further decompose elements of $\mathrm{SL}(3,\mathbb{H})$ as products of simple elements, where an element $g$ in $\mathrm{SL}(3,\mathbb{H})$ is called $\textit{simple}$ if it is conjugate to an element of $\mathrm{SL}(3,\mathbb{R})$. We have also revisited real projective transformations and following Goldman's ideas, have offered a complete classification for elements of $\mathrm{SL }(3,\mathbb{R})$.
description: Final version, 20 pages
Gas dynamical friction as a binary formation mechanism in AGN discs
Creators: name: DeLaurentiis, Stanislav
name: Epstein-Martin, Marguerite
name: Haiman, Zoltan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper, we study how gaseous dynamical friction (DF) affects the motion of fly-by stellar-mass black holes (sBHs) embedded in active galactic nucleus (AGN) discs. We perform 3-body integrations of the interaction of two co-planar sBHs in nearby, initially circular orbits around the supermassive black hole (SMBH). We find that DF can facilitate the formation of gravitationally bound near-Keplerian binaries in AGN discs, and we delineate the discrete ranges of impact parameters and AGN disc parameters for which such captures occur. We also report trends in the bound binaries' eccentricity and sense of rotation (prograde or retrograde with respect to the background AGN disc) as a function of the impact parameter of the initial encounter. While based on an approximate description of gaseous friction, our results suggest that binary formation in AGN discs should be common and may produce both prograde and retrograde, as well as both circular and eccentric binaries.
description: 16 pages, 13 figures, Published in MNRAS
Hemispheric asymmetry in the sunspot cycle as a nonextensive phenomenon
Creators: name: Batista, Leonardo F. G.
name: Santiago, Thiago M.
name: Filho, Paulo C. F. da Silva
name: Silva, Cleo V.
name: de Freitas, Daniel B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The appearance of dark sunspots over the solar photosphere is not considered to be symmetric between the northern and southern hemispheres. Among the different conclusions obtained by several authors, we can point out that the North-South asymmetry is a real and systematic phenomenon and is not due to random variability. In the present work, we selected the sunspot area data of a sample of 13 solar cycles divided by hemisphere extracted from the Marshall Space Flight Centre (MSFC) database to investigate the behavior of probability distributions using an out-of-equilibrium statistical model a.k.a non-extensive statistical mechanics. Based on this statistical framework, we obtained that the non-extensive entropic parameter $q$ has a semi-sinusoidal variation with a period of $\sim$22 year (Hale cycle). Among the most important results, we can highlight that the asymmetry index $q(A)$ revealed the dominance of the northern hemisphere against the southern one. Thus, we concluded that the parameter $q(A)$ can be considered an effective measure for diagnosing long-term variations of the solar dynamo. Finally, our study opens a new approach to investigating solar variability from the nonextensive perspective.
description: 17 pages, 2 tables and 5 figures. Submitted to Solar Physics
Two scales in Bose-Einstein correlations
Creators: name: Khoze, V. A.
name: Martin, A. D.
name: Ryskin, M. G.
name: Schegelsky, V. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that the secondaries produced in high energy hadron collisions are emitted by small size sources distributed over a much larger area in impact parameter space occupied by the interaction amplitude. That is, Bose-Einstein correlation of two emitted identical particles should be described by a `two-radii' parametrization ansatz. We discuss the expected energy, charged multiplicity and transverse momentum of the pair (that is, $\sqrt{s},~N_{\rm ch}, k_t$) behaviour of both the small and large size components.
description: 7 pages, 1 figure
Tricritical behavior in dynamical phase transitions
Creators: name: Agranov, Tal
name: Cates, Michael E.
name: Jack, Robert L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We identify a new scenario for dynamical phase transitions associated with time-integrated observables occurring in diffusive systems described by the macroscopic fluctuation theory. It is characterized by the pairwise meeting of first- and second-order bias-induced phase transition curves at two tricritical points. We formulate a simple, general criterion for its appearance and derive an exact Landau theory for the tricritical behavior. The scenario is demonstrated in three examples: the simple symmetric exclusion process biased by an activity-related structural observable; the Katz-Lebowitz-Spohn lattice gas model biased by its current; and in an active lattice gas biased by its entropy production.
description: 21 pages, authors' accepted version
title: L’assistance au suicide en EMS
title: quel est le rôle infirmier dans l’accompagnement de fin de vie des résidents ?
titleType: Subtitle
Creators: name: Chollet, Pauline
name: Jaquier, Noélie
Publisher: name: Unknown
Year: 0
Subjects: subject: assistance au suicide
subject: fin de vie
subject: établissement médico-social
subject: rôle infirmier
subject: caring
subject: hesav TB SI

description: Introduction : Depuis 2008 une forte augmentation des demandes d’assistance au suicide (AS) est observée. D’après l’ASI l’AS ne fait pas partie du rôle infirmier. Néanmoins, l’accompagnement de fin de vie en fait partie et ce peu importe la décision du patient quant à sa mort. La position infirmière est donc ambivalente et le contexte d’EMS augmente la susceptibilité que des soignants rencontrent des situations d’AS. Objectif : Définir le rôle infirmier dans l’accompagnement de fin de vie des résidents, lors de suicide assisté. Méthode : Premièrement, mobilisation des bases de données : CINAHL et PubMed. Deuxièmement, sélection et analyse de sept articles. Dernièrement, utilisation de la théorie du Caring de Watson et des dix facteurs caratifs pour interpréter les résultats. Résultats : Les résultats portent principalement sur le vécu des infirmiers dans le contexte d’assistance de fin de vie et permettent notamment de relever les difficultés rencontrées : divers questionnements éthiques (personnels et professionnels) de fortes émotions négatives comme positives, l’importance du soutien de l’équipe et des ressources personnelles et institutionnelles. Recommandations : Impliquer davantage les infirmiers dans les discussions, améliorer la collaboration entre professionnels, proposer briefings et débriefings face à l’AS, mettre en place des directives institutionnelles ainsi que des formations claires et accessibles. Conclusion : Cette revue a permis de rendre compte des principales difficultés rencontrée par les infirmiers lors d’AS et ce dans l’optique d’une position de Caring. Davantage d’études sur le rôle infirmier permettraient de mieux comprendre et définir leurs rôles dans ce contexte spécifique.
A Statistical Framework for Domain Shape Estimation in Stokes Flows
Creators: name: Borggaard, Jeff
name: Glatt-Holtz, Nathan E.
name: Krometis, Justin A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 76M21, 76D07, 65C05, 35R30, 60J22

description: We develop and implement a Bayesian approach for the estimation of the shape of a two dimensional annular domain enclosing a Stokes flow from sparse and noisy observations of the enclosed fluid. Our setup includes the case of direct observations of the flow field as well as the measurement of concentrations of a solute passively advected by and diffusing within the flow. Adopting a statistical approach provides estimates of uncertainty in the shape due both to the non-invertibility of the forward map and to error in the measurements. When the shape represents a design problem of attempting to match desired target outcomes, this "uncertainty" can be interpreted as identifying remaining degrees of freedom available to the designer. We demonstrate the viability of our framework on three concrete test problems. These problems illustrate the promise of our framework for applications while providing a collection of test cases for recently developed Markov Chain Monte Carlo (MCMC) algorithms designed to resolve infinite dimensional statistical quantities.
Confinement of many-body Bethe strings
Creators: name: Yang, Jiahao
name: Xie, Tao
name: Nikitin, S. E.
name: Wu, Jianda
name: Podlesnyak, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Based on Bethe-ansatz approach and inelastic neutron scattering experiments, we reveal evolution of confinement of many-body Bethe strings in ordered regions of quasi-one-dimensional antiferromagnet $\rm YbAlO_3$. In the antiferromagnetic phase, the spin dynamics is dominated by the confined length-1 Bethe strings, whose dominancy in the high-energy branch of the excitation spectrum yields to the confined length-2 Bethe strings when the material is tuned to the spin-density-wave phase. In the thermal-induced disordered region, the confinement effect disappears, and the system restores the conventional quantum integrable physics of the one-dimensional Heisenberg model. Our results establish a unified picture based on Bethe string for the spin dynamics in different magnetic phases of $\rm YbAlO_3$, and thus provide profound insight into the many-body quantum magnetism.
description: 5 pages, 4 figures
Entanglement Dynamics of Two V-type Atoms with Dipole-Dipole Interaction in Dissipative Cavity
Creators: name: Wang, Jia
name: Long, Dan
name: Wang, Qilin
name: Zou, Hong-Mei
name: Liu, Chenya
name: Ma, Qianqian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we study a coupled system of two V-type atoms with dipole-dipole interaction in a dissipative single-mode cavity, which couples with an external environment. We obtain the analytical solution of this model by solving the time dependent Schrodinger equation after we diagonalize Hamiltonian of dissipative cavity by introducing a set of new creation and annihilation operators according to Fano theorem. We also detailedly discuss the influences of cavity-environment coupling, spontaneously generated interference (SGI) parameter and dipole-dipole interaction between two atoms on entanglement dynamics under different initial states. The results show that the SGI parameter has different effects on entanglement dynamics under different initial states. Namely, the SGI parameter will increase the decay rate of the initially maximal entangled state and reduce that of the initially partial entangled state. For the initially product state, the larger SGI parameter corresponds to the more entanglement generated. The entanglement monotonically decreases under the weak cavity-environment coupling, while the oscillation of entanglement will occur under the strong cavity-environment coupling. The larger the dipole-dipole interaction is, the slower the entanglement decays and the more the entanglement will be generated. So the dipole-dipole interaction can not only protect and generate entanglement very effectively, but also enhance the regulation effect of the SGI parameter on entanglement.
description: 12 pages, 9 figures
title: An Examination of Food and Alcohol Disturbance Based on Sexual Orientation in a Sample of Women who Binge Eat
Creators: name: Moulder, Alicia M.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2024

description: Food and alcohol disturbance (FAD), characterized by disordered eating behaviors in the context of drinking alcohol to enhance intoxication, counteract alcohol’s calories, or both, is associated with increased risk of negative drinking consequences. Previously established as a phenomenon occurring in college students, research has begun to support that FAD may also occur in nonstudents. Three particularly vulnerable groups for FAD may include women, individuals with history of binge eating, as well as sexual minority individuals. Consequently, the goals of the current study were to elucidate differences in FAD engagement between sexual minority women (SMW) and heterosexual women using a sample of diverse young adult women with current binge eating behaviors. This study aimed to (1) compare frequency of FAD endorsement between heterosexual women and SMW, (2) examine the associations between FAD frequency and alcohol outcomes, as moderated by women’s sexual orientation, (3) examine the associations between different FAD behavior types and alcohol outcomes, as moderated by sexual orientation, and (4) evaluate the association between minority stress and FAD in SMW. Data for the current study came from a parent study examining disordered eating in a diverse sample of women who had recent history of binge eating behaviors and alcohol use (N = 216; 49.54% heterosexual; 50.46% SMW). Results suggested no difference in frequency of FAD between heterosexual women and SMW. While FAD frequency was positively associated with drinking consequences, women’s sexual orientation did not moderate this association. Lastly, minority stress was positively associated with FAD frequency for SMW. This study demonstrates need for additional research examining FAD in underrepresented (i.e., nonstudent) populations. Additionally, findings support the positive association between FAD and alcohol consequences in women who binge eat. This may indicate a need for clinicians to monitor alcohol use in women who binge eat to help reduce their risk for drinking consequences. While the current study utilized a diverse sample, future studies should recruit more diverse sexual minority subgroups across the spectrum of sexual attraction and behavior to evaluate if and how FAD differs within the sexual minority population.
Implementing Neural Network-Based Equalizers in a Coherent Optical Transmission System Using Field-Programmable Gate Arrays
Creators: name: Freire, Pedro J.
name: Srivallapanondh, Sasipim
name: Anderson, Michael
name: Spinnler, Bernhard
name: Bex, Thomas
name: Eriksson, Tobias A.
name: Napoli, Antonio
name: Schairer, Wolfgang
name: Costa, Nelson
name: Blott, Michaela
name: Turitsyn, Sergei K.
name: Prilepsky, Jaroslaw E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Hardware Architecture (cs.AR)
subject: Computational Complexity (cs.CC)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this work, we demonstrate the offline FPGA realization of both recurrent and feedforward neural network (NN)-based equalizers for nonlinearity compensation in coherent optical transmission systems. First, we present a realization pipeline showing the conversion of the models from Python libraries to the FPGA chip synthesis and implementation. Then, we review the main alternatives for the hardware implementation of nonlinear activation functions. The main results are divided into three parts: a performance comparison, an analysis of how activation functions are implemented, and a report on the complexity of the hardware. The performance in Q-factor is presented for the cases of bidirectional long-short-term memory coupled with convolutional NN (biLSTM + CNN) equalizer, CNN equalizer, and standard 1-StpS digital back-propagation (DBP) for the simulation and experiment propagation of a single channel dual-polarization (SC-DP) 16QAM at 34 GBd along 17x70km of LEAF. The biLSTM+CNN equalizer provides a similar result to DBP and a 1.7 dB Q-factor gain compared with the chromatic dispersion compensation baseline in the experimental dataset. After that, we assess the Q-factor and the impact of hardware utilization when approximating the activation functions of NN using Taylor series, piecewise linear, and look-up table (LUT) approximations. We also show how to mitigate the approximation errors with extra training and provide some insights into possible gradient problems in the LUT approximation. Finally, to evaluate the complexity of hardware implementation to achieve 200G and 400G throughput, fixed-point NN-based equalizers with approximated activation functions are developed and implemented in an FPGA.
description: Invited paper at Journal of Lightwave Technology - IEEE
Late Kinetic Decoupling of Light Magnetic Dipole Dark Matter
Creators: name: Gondolo, Paolo
name: Kadota, Kenji
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the kinetic decoupling of light (lesssim 10 GeV) magnetic dipole dark matter (DM). We find that present bounds from collider, direct DM searches, and structure formation allow magnetic dipole DM to remain in thermal equilibrium with the early universe plasma until as late as the electron-positron annihilation epoch. This late kinetic decoupling leads to a minimal mass for the earliest dark protohalos of thousands of solar masses, in contrast to the conventional weak scale DM scenario where they are of order 10^{-6} solar masses.
description: 14 pages, 2 figures
Stackelberg Meta-Learning Based Control for Guided Cooperative LQG Systems
Creators: name: Zhao, Yuhan
name: Zhu, Quanyan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Guided cooperation allows intelligent agents with heterogeneous capabilities to work together by following a leader-follower type of interaction. However, the associated control problem becomes challenging when the leader agent does not have complete information about follower agents. There is a need for learning and adaptation of cooperation plans. To this end, we develop a meta-learning-based Stackelberg game-theoretic framework to address the challenges in the guided cooperative control for linear systems. We first formulate the guided cooperation between agents as a dynamic Stackelberg game and use the feedback Stackelberg equilibrium as the agent-wise cooperation strategy. We further leverage meta-learning to address the incomplete information of follower agents, where the leader agent learns a meta-response model from a prescribed set of followers offline and adapts to a new coming cooperation task with a small amount of learning data. We use a case study in robot teaming to corroborate the effectiveness of our framework. Comparison with other learning approaches also shows that our learned cooperation strategy provides better transferability for different cooperation tasks.
Ultrastable, high-repetition-rate attosecond beamline for time-resolved XUV-IR coincidence spectroscopy
Creators: name: Ertel, Dominik
name: Schmoll, Marvin
name: Kellerer, Samuel
name: Jäger, Anna-Lena
name: Weissenbilder, Robin
name: Moioli, Matteo
name: Ahmadi, Hamed
name: Busto, David
name: Makos, Ioannis
name: Frassetto, Fabio
name: Poletto, Luca
name: Schröter, Claus Dieter
name: Pfeifer, Thomas
name: Moshammer, Robert
name: Sansone, Giuseppe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The implementation of attosecond photoelectron-photoion coincidence spectroscopy for the investigation of atomic and molecular dynamics calls for a high-repetition-rate driving source combined with experimental setups characterized by excellent stability for data acquisition over time intervals ranging from a few hours up to a few days. This requirement is crucial for the investigation of processes characterized by low cross sections and for the characterization of fully differential photoelectron(s) and photoion(s) angular and energy distributions. We demonstrate that the implementation of industrial-grade lasers, combined with a careful design of the delay line implemented in the pump-probe setup, allows one to reach ultrastable experimental conditions leading to an error in the estimation of the time delays of only 12 as. This result opens new possibilities for the investigation of attosecond dynamics in simple quantum systems.
Exact solution of the boundary-dissipated transverse field Ising model: Structure of Liouvillian spectrum and dynamical duality
Creators: name: Zheng, Zhen-Yu
name: Wang, Xueliang
name: Chen, Shu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the boundary-dissipated transverse field Ising model described by a Lindblad Master equation and exactly solve its Liouvillian spectrum in the whole parameter space. By mapping the Liouvillian into a Su-Schrieffer-Heeger model with imaginary boundary potentials under a parity constraint, we solve the rapidity spectrum analytically and thus construct the Liouvillian spectrum strictly with a parity constraint condition. Our results demonstrate that the Liouvillian spectrum displays four different structures, which are characterized by different numbers of segments. By analyzing the properties of rapidity spectrum, we can determine the phase boundaries between different spectrum structures analytically and prove the Liouvillian gap fulfilling a duality relation in the weak and strong dissipation region. Furthermore, we unveil the existence of a dynamical duality, i.e., the long-time relaxation dynamics exhibits almost the same dynamical behavior in the weak and strong dissipation region as long as the duality relation holds true.
description: 15 pages, 10 figures
2D interfacial diffusion model of inhibitory synaptic receptor dynamics
Creators: name: Bressloff, Paul C
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The lateral diffusion and trapping of protein receptors within the postsynaptic membrane of a neuron plays a key role in determining the strength of synaptic connections and their regulation during learning and memory. In this paper we construct and analyze a 2D interfacial diffusion model of inhibitory synaptic receptor dynamics. The model involves three major components. First, the boundary of each synapse is treated as a semi-permeable interface due to the effects of cytoskeletal structures. Second, the effective diffusivity within a synapse is taken to be smaller than the extrasynaptic diffusivity due to the temporary binding to scaffold protein buffers within the synapse. Third, receptors from intracellular pools are inserted into the membrane extrasynaptically and internalized extrasynaptically and synaptically. We first solve the model equations for a single synapse in an unbounded domain and explore how the non-equilibrium steady-state number of synaptic receptors depends on model parameters. We then use matched asymptotic analysis to solve the corresponding problem of multiple synapses in a large, bounded domain. Finally, treating a synapse as a phase separated condensate of scaffold proteins, we describe how diffusion of individual scaffold proteins can also be modeled in terms of interfacial diffusion. We thus establish interfacial diffusion as a general paradigm for exploring synaptic dynamics and plasticity.
description: 27 pages, 4 figures
Weak decay of halo nuclei
Creators: name: Elkamhawy, Wael
name: Hammer, Hans-Werner
name: Platter, Lucas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We investigate the weak decay of one-neutron halo nuclei into the proton-core continuum, i.e., beta-delayed proton emission from the halo nucleus using a cluster effective field theory for halo nuclei. On the one hand, we calculate the direct decay into the continuum. On the other hand, we consider the case of resonant final state interactions between the proton and the core. We present our formalism and discuss the application to the decay of $^{11}$Be in detail. Moreover, we compare to recent experimental results for the branching ratio and resonance parameters. As another example, we consider the case of $^{19}$C and predict the branching ratio for beta-delayed proton emission.
description: 20 pages, 7 figures
Outdoor Systems Performace and Upgrade
Creators: name: Lopes, L.
name: Andringa, S.
name: Assis, P.
name: Blanco, A.
name: Carolino, N.
name: Cerda, M. A.
name: Clemêncio, F.
name: Conceição, R.
name: Cunha, O.
name: Dobrigkeit, C.
name: Ferreira, M.
name: Loureiro, C.
name: Mendes, L.
name: Nogueira, J. C.
name: Pereira, A.
name: Pimenta, M.
name: Saraiva, J.
name: Sarmento, R.
name: Teixeira, P.
name: Tomé, B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Over the last two decades, the possibility of using RPCs in outdoors systems has increased considerably. Our group has participated in this effort having installed several systems and continues to work on their optimization, while simultaneously studying and developing new approaches that can to use of RPCs in outdoor applications. In particular, some detectors were deployed in the field at the Pierre Auger Observatory in 2019 remained inactive, awaiting the commissioning of support systems. During the pandemic the detectors were left without gas flow for more than two years, but were recently reactivated with no major problems. The LouMu project combines particle physics and geophysics in order to map large geologic structures, using Muon Tomography. The development of the RPC system used and the data from the last two years will be presented. Finally, recent advances in a large area (1 m2) double gap-sealed RPC will be presented.
Measurement of the total neutron cross section on argon in the 20 to 70 keV energy range
Creators: name: Andringa, S.
name: Bezawada, Y.
name: Erjavec, T.
name: He, J.
name: Huang, J.
name: Koehler, P.
name: Mocko, M.
name: Mulhearn, M.
name: Pagani, L.
name: Pantic, E.
name: Pickard, L.
name: Svoboda, R.
name: Ullmann, J.
name: Wang, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The cross section for neutron interactions on argon is an important design and operational parameter for a number of neutrino, dark matter, and neutrinoless double beta decay experiments which use liquid argon as a detection or shielding medium. There is a discrepancy between the evaluated total cross section in the $20$ to $70~\rm$\,keV neutron kinetic energy region given in the ENDF database and a single measurement conducted by an experiment with a thin target (0.2 atoms/barn) optimized for higher cross sections. This gives rise to significant uncertainty in the interaction length of neutrons in liquid argon. This discrepancy is now resolved by new results presented here from the Argon Resonance Transport Interaction Experiment (ARTIE), a thick target experiment (3.3 atoms/barn) optimized for the small cross sections in this energy region.
description: 6 pages, 4 figures. Submitted to PRC based on reviewer's recommendations
Brane Brick Models and 2d (0,2) Triality
Creators: name: Franco, Sebastian
name: Lee, Sangmin
name: Seong, Rak-Kyeong
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We provide a brane realization of 2d (0,2) Gadde-Gukov-Putrov triality in terms of brane brick models. These are Type IIA brane configurations that are T-dual to D1-branes over singular toric Calabi-Yau 4-folds. Triality translates into a local transformation of brane brick models, whose simplest representative is a cube move. We present explicit examples and construct their triality networks. We also argue that the classical mesonic moduli space of brane brick model theories, which corresponds to the probed Calabi-Yau 4-fold, is invariant under triality. Finally, we discuss triality in terms of phase boundaries, which play a central role in connecting Calabi-Yau 4-folds to brane brick models.
description: 66 pages, 50 figures. v2: references and minor clarification added