cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contextual Graph Attention for Answering Logical Queries over Incomplete Knowledge Graphs
Creators: name: Mai, Gengchen
name: Janowicz, Krzysztof
name: Yan, Bo
name: Zhu, Rui
name: Cai, Ling
name: Lao, Ni
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: I.2.4; I.1.3

description: Recently, several studies have explored methods for using KG embedding to answer logical queries. These approaches either treat embedding learning and query answering as two separated learning tasks, or fail to deal with the variability of contributions from different query paths. We proposed to leverage a graph attention mechanism to handle the unequal contribution of different query paths. However, commonly used graph attention assumes that the center node embedding is provided, which is unavailable in this task since the center node is to be predicted. To solve this problem we propose a multi-head attention-based end-to-end logical query answering model, called Contextual Graph Attention model(CGA), which uses an initial neighborhood aggregation layer to generate the center embedding, and the whole model is trained jointly on the original KG structure as well as the sampled query-answer pairs. We also introduce two new datasets, DB18 and WikiGeo19, which are rather large in size compared to the existing datasets and contain many more relation types, and use them to evaluate the performance of the proposed model. Our result shows that the proposed CGA with fewer learnable parameters consistently outperforms the baseline models on both datasets as well as Bio dataset.
description: 8 pages, 3 figures, camera ready version of article accepted to K-CAP 2019, Marina del Rey, California, United States
Hot Jupiter Atmospheric Flows at High Resolution
Creators: name: Menou, Kristen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Global Circulation Models (GCMs) of atmospheric flows are now routinely used to interpret observational data on Hot Jupiters. Localized "equatorial $β$-plane" simulations by Fromang et al. (2016) have revealed that a barotropic (horizontal shear) instability of the equatorial jet appears at horizontal resolutions beyond those typically achieved in global models; this instability could limit wind speeds and lead to increased atmospheric variability. To address this possibility, we adapt the computationally efficient, pseudo-spectral PlaSim GCM, originally designed for Earth studies, to model Hot Jupiter atmospheric flows and validate it on the Heng et al. (2011) reference benchmark. We then present high resolution global models of HD209458b, with horizontal resolutions of T85 (128x256) and T127 (192x384). The barotropic instability phenomenology found in $β$-plane simulations is not reproduced in these global models, despite comparably high resolutions. Nevertheless, high resolution models do exhibit additional flow variability on long timescales (of order 100 planet days or more), which is absent from the lower resolution models. It manifests as a breakdown of north-south symmetry of the equatorial wind. From post-processing the atmospheric flows at various resolutions (assuming a cloud-free situation), we show that the stronger flow variability achieved at high resolution does not translate into noticeably stronger dayside infrared flux variability. More generally, our results suggest that high horizontal resolutions are not required to capture the key features of hot Jupiter atmospheric flows.
description: Submitted to MNRAS
Rydberg Atoms in Magnetic Quadrupole Traps
Creators: name: Lesanovsky, I.
name: Schmiedmayer, J.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate the electronic structure and properties of Rydberg atoms exposed to a magnetic quadrupole field. It is shown that the spatial as well as generalized time reversal symmetries lead to a two-fold degeneracy of the electronic states in the presence of the external field. A delicate interplay between the Coulomb and magnetic interactions in the inhomogeneous field leads to an unusual weak field splitting of the energy levels as well as complex spatial patterns of the corresponding spin polarization density of individual Rydberg states. Remarkably the magnetic quadrupole field induces a permanent electric dipole moment of the atom.
description: 8 pages, 5 figures, accepted for publication in EPL
Optimal control of a Bose-Eintein Condensate in an optical lattice: The non-linear and two-dimensional cases
Creators: name: Dionis, E.
name: Peaudecerf, B.
name: Guérin, S.
name: Guéry-Odelin, D.
name: Sugny, D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We numerically study the optimal control of an atomic Bose-Einstein condensate in an optical lattice. We present two generalizations of the gradient-based algorithm, GRAPE, in the non-linear case and for a two-dimensional lattice. We show how to construct such algorithms from Pontryagin's maximum principle. A wide variety of target states can be achieved with high precision by varying only the laser phases setting the lattice position. We discuss the physical relevance of the different results and the future directions of this work.
description: 22 pages, 7 figures
Asymptotic estimation of shift parameter of a quantum state
Creators: name: Holevo, A. S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We develop an asymptotic theory of estimation of a shift parameter in a pure quantum state to study the relation between entangled and unentangled covariant estimates in the analytically most transparent way. After recollecting basics of estimation of shift parameter in Sec. 2, we study the structure of the optimal covariant estimate in Sec. 3, showing how entanglement comes into play for several independent trials. In Secs. 4,5 we give the asymptotics of the performance of the optimal covariant estimate comparing it with the ``semiclassical'' unentangled covariant estimation in the regular case of finite variance of the generator of the shift group. Sec. 6 is devoted to covariant estimation in the case where the regularity assumption is violated.
description: 18 pages. Comments and new references are added following discussions at the Workshop "Quantum Measurement and Quantum Stochastics" at Maphysto, University of Aarhus, August 7-12, 2003, where the initial version of the paper was presented
Michel Bellet, Philippe Solal (dir.), Économie, républicanisme et république, Paris (Classiques Garnier) 2019
Creators: name: Albertone, Manuela
Publisher: name: Francia-Recensio
Year: 2021

description: Michel Bellet, Philippe Solal (dir.), Économie, républicanisme et république, Paris (Classiques Garnier) 2019, 258 p. (Bibliothèque de l’économiste, 22), ISBN 978-2-406-09058-8, EUR 32,00.
description: Francia-Recensio, 2021/1
Role of surface states in STM spectroscopy of (111) metal surfaces with Kondo adsorbates
Creators: name: Merino, J.
name: Gunnarsson, O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A nearly-free-electron (NFE) model to describe STM spectroscopy of (111) metal surfaces with Kondo impurities is presented. Surface states are found to play an important role giving a larger contribution to the conductance in the case of Cu(111) and Au(111) than Ag(111) surfaces. This difference arises from the farther extension of the Ag(111) surface state into the substrate. The different line shapes observed when Co is adsorbed on different substrates can be explained from the position of the surface band onset relative to the Fermi energy. The lateral dependence of the line shape amplitude is found to be bulk-like for R|| < 4 Amstrongs and surface-like at larger distances, in agreement with experimental data.
description: 4 pages, 3 eps figures
Anderson transition at complex energies in one-dimensional parity-time-symmetric disordered systems
Creators: name: Wang, Wei
name: Wang, Xulong
name: Ma, Guancong
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The presence of disorder can severely impede wave transport, resulting in the famous Anderson localization. Previous theoretical studies found that Anderson transition can exist in one-dimensional (1D) non-Hermitian disordered rings with chiral hopping, defying the scaling theory of localization for Hermitian systems. In these systems, localized (extended) modes are associated with real (complex) energies. Here, we report that Anderson localized modes with complex energies can also exist in such systems. The emergence of the complex-energy localized modes (CELMs) directly ties to the properties of the corresponding pristine non-Hermitian system. Specifically, the density of states of the complex spectrum under the periodic boundary condition and the non-Bloch parity-time transition of the open-boundary chain both play critical roles in the emergence of the CELMs. The coexistence of extended modes, real-energy localized modes (RELMs), and CELMs should be a generic phenomenon for 1D non-Hermitian disordered systems under class AI. Our work shows that the interplay between Anderson mechanism and non-Hermitian physics enriches the properties of disordered media and opens new possibilities for controlling wave transport.
description: 16 pages, 5 figures
Morphing quantum mechanics and fluid dynamics
Creators: name: Curtright, Thomas
name: Fairlie, David
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Analysis of PDEs (math.AP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35Q35; 76D99

description: We investigate the effects of given pressure gradients on hydrodynamic flow equations. We obtain results in terms of implicit solutions and also in the framework of an extra-dimensional formalism involving the diffusion/Schrodinger equation.
description: Examples involving shocks and references added
Jeffrey F. Hamburger, Eva Schlotheuber (ed.), The Liber ordinarius of Nivelles (Houghton Library, MS Lat 422). Liturgy as an Interdisciplinary Intersection, Tübingen (Mohr Siebeck) 2020
Creators: name: Vanderputten, Steven
Publisher: name: Francia-Recensio
Year: 2021

description: Jeffrey F. Hamburger, Eva Schlotheuber (ed.), The Liber ordinarius of Nivelles (Houghton Library, MS Lat 422). Liturgy as an Interdisciplinary Intersection, Tübingen (Mohr Siebeck) 2020, XII–513 p. (Spätmittelalter, Humanismus, Reformation. Studies in the Late Middle Ages, Humanism, and the Reformation, 111), ISBN 978-3-16-158242-4, EUR 119,00.
description: Francia-Recensio, 2021/1
Galaxies Under the Cosmic Microscope: A GMOS Study of the Lensed Disk-Galaxy #289 in A2218
Creators: name: Swinbank, A. M.
name: Smith, J.
name: Bower, R. G.
name: Bunker, A.
name: Smail, I.
name: Ellis, R. S.
name: Smith, Graham P.
name: Kneib, J. P.
name: Sullivan, M.
name: Allington-Smith, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this letter, we exploit the gravitational potential of the rich cluster A2218 as a magnifying glass. We demonstrate that the magnification due to the cluster allows us to observe distant background galaxies at a comparable level of detail to galaxies at z~0.1. Using the GMOS Integral Field Unit on Gemini North we observed the spatially-resolved [OII](3727) emission line spectrum for a lensed disk-galaxy at z=1.034. Using a detailed model for the cluster mass distribution, we are able to correct for the lensing by the cluster and reconstruct the source morphology. We find that the overall magnification is a factor of 4.92 +/- 0.15, and the rest-frame absolute I-band magnitude is M_{I}^{rest} = -22.4 +/- 0.2, where the error bars include conservative estimates of the uncertainty in the source-plane reconstruction. The inclination-corrected circular velocity is 206 +/- 18km/s. The galaxy lies very close to the mean Tully-Fisher relation of present-day spirals. Although our results are based on a single object, they demonstrate that gravitational lensing can be viably used to make detailed studies of the evolution of the structure of distant field galaxies.
description: 5 pages, 4 figures. ApJ accepted. Color images can be obtained from http://star-www.dur.ac.uk/~ams/lensing/a2218arc/
Mechanisms Behind the Aschenbach Effect in Non-Rotating Black Hole Spacetime
Creators: name: Afshar, Mohammad Ali S.
name: Sadeghi, Jafar
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: General relativity predicts that a rotating black hole drags the spacetime due to its spin. This effect can influence the motion of nearby objects, causing them to either fall into the black hole or orbit around it. In classical Newtonian mechanics, as the radius of the orbit increases, the angular velocity of an object in a stable circular orbit decreases. However, Aschenbach discovered that for a hypothetical non-rotating observer, contrary to usual behavior, the angular velocity increases with radius in certain regions. Although the possibility of observing rare and less probable rotational behaviors in a rotating structure is not unlikely or impossible. However, observing such behaviors in a static structure is not only intriguing but also thought-provoking, as it raises questions about the factors that might play a role in such phenomena. In seeking answers to this question, various static models, particularly in the context of nonlinear fields, were examined, with some results presented as examples in the article. Among the models studied, the model of Magnetic Black Holes in 4D Einstein Gauss Bonnet Massive Gravity Coupled to Nonlinear Electrodynamics (M-EGB-Massive) appears to be a candidate for this phenomenon. In the analysis section, we will discuss the commonalities of this model with previous models that have exhibited this phenomenon and examine the cause of this phenomenon. Finally, we will state whether this phenomenon is observable in other black holes and, if not, why
description: 15 pages, 9 figures, Accepted for publication in Annals of Physics
Les écrits anti-sarrasins de Pierre le Vénérable. Cultures de combat et combat de cultures. »Summa totius haeresis Sarracenorum – Epistola de translatione sua – Contra sectam sive haeresim Sarracenorum«, Leuven, Walpole, MA (Peeters Publishers) 2020
Creators: name: Drews, Wolfram
Publisher: name: Francia-Recensio
Year: 2021

description: Les écrits anti-sarrasins de Pierre le Vénérable. Cultures de combat et combat de cultures. »Summa totius haeresis Sarracenorum – Epistola de translatione sua – Contra sectam sive haeresim Sarracenorum«. Texte émendé de l’édition d’Arnold Glei. Introduction, traduction et annotation d’Alain Galonnier, Leuven, Walpole, MA (Peeters Publishers) 2020, VIII–386 p. (Philosophes médiévaux, 67), ISBN 978-90-4294002-4, EUR 105,00.
description: Francia-Recensio, 2021/1
Parametric resonance of Josephson plasma waves: A theory for optically amplified interlayer superconductivity in YBa$_2$Cu$_3$O$_{6+x}$
Creators: name: Michael, Marios H.
name: von Hoegen, Alex
name: Fechner, Michael
name: Först, Michael
name: Cavalleri, Andrea
name: Demler, Eugene
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Non-linear interactions between collective modes play a definitive role in far out of equilibrium dynamics of strongly correlated electron systems. Understanding and utilizing these interactions is crucial to photo-control of quantum many-body states. One of the most surprising examples of strong mode coupling is the interaction between apical oxygen phonons and Josephson plasmons in bilayer YBa$_2$Cu$_3$O$_{6+x}$ superconductors. Experiments by Hu et al (2014). and Kaiser et al. (2014) showed that below Tc, photo-excitation of phonons leads to enhancement and frequency shifts of Josephson plasmon edges, while aboveTc, photo-excited phonons induce plasmon edges even when there are no discernible features in the equilibrium reflectivity spectrum. Recent experiments by Van Hoegen et al. (2019) also observed parametric generation of Josephson plasmons from photo-excited phonons both below Tc and in the pseudogap phase. In this paper we present a theoretical model of phonon-plasmon three wave interaction arising from coupling between the oxygen motion and the in-plane superfluid stiffness. Analysis of the parametric instability of plasmons based on this model gives frequencies of the most unstable plasmons that are in agreement with experimental observations. We also discuss how strong parametric excitation of Josephson plasmons can explain pump induced changes in the TeraHertz reflectivity of YBa$_2$Cu$_3$O$_{6+x}$ in the superconducting state, including frequency shifts and sharpening of Josephson plasmon edges, as well as appearance of a new peak around 2THz. An interesting feature of this model is that overdamped Josephson plasmons do not give any discernible features in reflectivity in equilibrium, but can develop plasmon edges when parametrically excited. We suggest that this mechanism explains photo-induced plasmon edges in the pseudogap phase of YBa$_2$Cu$_3$O$_{6+x}$.
description: 21 papers, 17 figures
title: Modelling Scientific Discovery
Creators: name: Cheng, Peter C-H
Publisher: name: The Open University
Year: 1990

description: Traditionally, the Philosophy of Science has examined the nature of scientific discovery. In recent years, Cognitive Science has gathered together work in Artificial Intelligence (AI) and Cognitive Psychology that attempts to understand scientific discovery. However, at present, there is no generally accepted account of scientific discovery in any of these disciplines. This thesis aims further to explore the nature of scientific discovery from an AI perspective, but does so within a clearly defined Framework, designed to structure cognitive science research on scientific discovery. The framework proposes a minimum set of components as a guide to the construction of acceptable accounts of scientific discovery. The focal concept is the Research Programme; a body of research that investigates a delimited set of phenomena using a Theoretical component and an Experimental component. The framework posits: three types of theoretical knowledge; three levels of experiments; inferences to apply and generate new theoretical & experimental knowledge; criteria for assessing the acceptability of theories & the reliability of experiments; and multiple levels of communication between the components. Previous computer models and empirical studies of scientific discovery are reviewed. They tend not to offer complete accounts of scientific discovery, as defined by the framework. In particular, many completely ignore the crucial role of experiments. The STERN computational model of scientific discovery is introduced. It instantiates all the components of the Framework. STERN currently models discoveries made by Galileo in the domain of naturally accelerated terrestrial motion, although it may be applied more generally. STERN has four main strategies that are used to make discoveries: (i) confirming existing hypotheses; (ii) generalizing experimental results to form new hypotheses; (iii) generating new hypotheses from known hypotheses; and (iv) generating new experiments. STERN is more complete than previous computational models. As such it allows novel heuristics at the level of research programmes to be investigated and high level abilities to emerge from its complexity.
Low birthweight prevalence among Spanish women during the economic crisis: differences by parity
Creators: name: Terán, José Manuel
name: Juárez, Sol
name: Bernis, Cristina
name: Bogin, Barry
name: Varea, Carlos
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Cancer

description: Previous studies have demonstrated a negative, significant impact on birthweight associated with the current economic crisis in Spain, which has also been reported for other European countries. Effects by parity are not known. Our aim is to compare the trends in low birthweight (LBW) by parity in Spain from 1996 to 2016. Using the National Vital Statistics data, joinpoint regression analysis was used to identify the time periods of significant changes in the prevalence of LBW by parity. Adjusted relative risk (RR) of LBW by year of birth was calculated in order to confirm that the time trend differences in LBW by parity were independent of possible confounders. The prevalence of LBW among live births to primiparous increased from 5.12% to 6.87% in 2008 and then stabilised at maximum values, while among live births to multiparous LBW increased from 3.96% to a maximum of 5.20% and then significantly reduced. Trends in adjusted RR of LBW by parity confirm that primiparous and multiparous were affected differently by the economic crisis. Older, nulliparous women may have felt more biosocial pressure to reproduce during the economic crisis, compared to women who were already mothers. This biosocial pressure may have increased the risks for LBW.
Derivations of the Lie Algebras of Differential Operators
Creators: name: Grabowski, J.
name: Poncin, N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Differential Geometry (math.DG)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17B63 (Primary), 13N10, 16S32, 17B40, 17B65, 53D17 (Secondary)

description: This paper encloses a complete and explicit description of the derivations of the Lie algebra D(M) of all linear differential operators of a smooth manifold M, of its Lie subalgebra D^1(M) of all linear first-order differential operators of M, and of the Poisson algebra S(M)=Pol(T*M) of all polynomial functions on T*M, the symbols of the operators in D(M). It turns out that, in terms of the Chevalley cohomology, H^1(D(M),D(M))=H^1_{DR}(M), H^1(D^1(M),D^1(M))=H^1_{DR}(M)\oplus\R^2, and H^1(S(M),S(M))=H^1_{DR}(M)\oplus\R. The problem of distinguishing those derivations that generate one-parameter groups of automorphisms and describing these one-parameter groups is also solved.
description: LaTeX, 15 pages
A mixed discontinuous Galerkin method without interior penalty for time-dependent fourth order problems
Creators: name: Liu, Hailiang
name: Yin, Peimeng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: A novel discontinuous Galerkin (DG) method is developed to solve time-dependent bi-harmonic type equations involving fourth derivatives in one and multiple space dimensions. We present the spatial DG discretization based on a mixed formulation and central interface numerical fluxes so that the resulting semi-discrete schemes are $L^2$ stable even without interior penalty. For time discretization, we use Crank-Nicolson so that the resulting scheme is unconditionally stable and second order in time. We present the optimal $L^2$ error estimate of $O(h^{k+1})$ for polynomials of degree $k$ for semi-discrete DG schemes, and the $L^2$ error of $O(h^{k+1} +(Δt)^2)$ for fully discrete DG schemes. Extensions to more general fourth order partial differential equations and cases with non-homogeneous boundary conditions are provided. Numerical results are presented to verify the stability and accuracy of the schemes. Finally, an application to the one-dimensional Swift-Hohenberg equation endowed with a decay free energy is presented.
description: 30 pages, 9 figures
Charge ordering and phase separation in the infinite dimensional extended Hubbard model
Creators: name: Tong, Ning-Hua
name: Shen, Shun-Qing
name: Bulla, Ralf
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the extended Hubbard model with both on-site (U) and nearest neighbor (V) Coulomb repulsion using the exact diagonalization method within the dynamical mean field theory. For a fixed U (U=2.0), the T-n phase-diagrams are obtained for V=1.4 and V=1.2, at which the ground states of n=1/2 system is charge-ordered and charge-disordered, respectively. In both cases, robust charge order is found at finite temperature and in an extended filling regime around n=1/2. The order parameter changes non-monotonously with temperature. For V=1.4, phase separation between charge-ordered and charge-disordered phases is observed in the low temperature and n < 0.5 regime. It is described by an "S"-shaped structure of the n-/mu curve. For V=1.2, the ground state is charge-disordered, and a reentrant charge-ordering transition is observed for 0.42 < n < 0.68. Relevance of our results to experiments for doped manganites is discussed.
description: 9 pages, 7 figures, submitted to Phys. Rev. B
A search for baryogenesis and dark matter in $B^+ \to Λ_c^+ + {\rm invisible}$ decays
Creators: name: BABAR Collaboration
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A mechanism of baryogenesis and dark matter production via $B$-meson oscillations and decays has recently been proposed to explain the observed dark matter abundance and matter-antimatter asymmetry in the universe. This mechanism introduces a light dark sector particle ($ψ_D$) with a non-zero baryonic charge. We present a search for this new state in $B^+ \to Λ_c^+ \, ψ_D$ decays using data collected at the $Υ(4S)$ resonance by the BABAR detector at SLAC, corresponding to an integrated luminosity of $431.0 \rm{~fb}^{-1}$. The search leverages the full reconstruction of the $B^-$ meson in $Υ(4S) \to B^+B^-$ decays, accompanied by the reconstruction of a $Λ_c^+$, to infer the presence of $ψ_D$. No significant signal is observed, and limits on the $B^+ \to Λ_c^+ \, ψ_D$ branching fraction are set at the level of $1.6 \times 10^{-4}$ at 90% confidence level for $0.94 < m_{ψ_D} < 2.99$ GeV. These results set strong constraints on the parameter space allowed by $B$-meson baryogenesis.
description: 7 pages, 5 figures, published version
Upper limits on stray force noise for LISA
Creators: name: Carbone, L.
name: Cavalleri, A.
name: Dolesi, R.
name: Hoyle, C. D.
name: Hueller, M.
name: Vitale, S.
name: Weber, W. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have developed a torsion pendulum facility for LISA gravitational reference sensor ground testing that allows us to put significant upper limits on residual stray forces exerted by LISA-like position sensors on a representative test mass and to characterize specific sources of disturbances for LISA. We present here the details of the facility, the experimental procedures used to maximize its sensitivity, and the techniques used to characterize the pendulum itself that allowed us to reach a torque sensitivity below 20 fNm /sqrt{Hz} from 0.3 to 10 mHz. We also discuss the implications of the obtained results for LISA.
description: To be published in Classical and Quantum Gravity, special issue on Amaldi5 2003 conference proceedings (10 pages, 6 figures)
Ionuţ Epurescu-Pascovici (ed.), Accounts and Accountability in Late Medieval Europe. Records, Procedures, and Socio-Political Impact, Turnhout (Brepols) 2020
Creators: name: Mayade-Claustre, Julie
Publisher: name: Francia-Recensio
Year: 2021

description: Ionuţ Epurescu-Pascovici (ed.), Accounts and Accountability in Late Medieval Europe. Records, Procedures, and Socio-Political Impact, Turnhout (Brepols) 2020, VI–306 p., 20 b/w ill., 20 b/w tabl. (Utrecht Studies in Medieval Literacy, 50), ISBN 978-2-503-58853-7, EUR 90,00.
description: Francia-Recensio, 2021/1
Implicações Éticas nos Serviços de Aquisição: Algumas Reflexões a partir da Realidade Brasileira
Creators: name: Vergueiro, Waldomiro C.S.
Publisher: name: Cadernos BAD
Year: 1996

description: Implicações Éticas nos Serviços de Aquisição: Algumas Reflexões a partir da Realidade Brasileira
description: Cadernos BAD, N.º 1 (1996)
Brominated flame retardants in wild bird eggs from the industrialised heartland of South Africa
Creators: name: LP Quinn
name: C Roos
name: R Pieters
name: A Polder
name: H Bouwman
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Brominated flame-retardants (BFRs), including polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD), were analysed in 77 eggs of 13 wild bird species from Gauteng and northern Free State (the industrial heartland of South Africa). BFRs were in all eggs, but not all BFRs were quantifiable. Concentrations ranged between 2.9 and 46 ng g−1 wm (wet mass) and the predominant congeners were BDE-47, -153, -154, -183 and -209. The BFR compositional patterns of the congeners in eggs differed between species, feeding guilds, and habitats. Differences in associations of birds with humans seemed to have as much an influence as the trophic levels occupied by the maternal animals. The congener pattern of BFRs differed between terrestrial and aquatic species. The congener concentrations and patterns also differed from eggs from other countries, suggesting differences in sources. BFR concentrations in eggs from the current study area were below a reported no observed effect level (NOEL; 1 000 ng g−1 wm). Although this suggests that the BFRs do not pose a risk, the NOEL was mostly based on information from birds from moderate and colder climates. This NOEL might not apply to birds from warmer climates with different life histories, as in the current study, because there are currently only draft regulations on importing BFRs or BFR-containing products in South Africa. The BFR-containing products otherwise destined for countries with BFR restrictions in place may now find their way to South Africa. The additional waste these poorly regulated products generate will eventually find their way to landfills ensuring that release to the environment and consequent exposures to biota will continue without effective interventions and waste management. Our findings indicate the need for on-going environmental monitoring to assess trends, identify hot spots, investigate effects, strengthen waste management, and the need to urgently implement the commitments under the Stockholm Convention.
Generalized master equation with nonhermitian operators
Creators: name: Huang, C. F.
name: Huang, K. -N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: By extending the mean-field Hamiltonian to include nonhermitian operators, the master equations for fermions and bosons can be derived. The derived equations reduce to the Markoff master equation in the low-density limit and to the quasiclassical master equation for homogeneuos systems.
description: 17 pages
Mixture of Experts Meets Decoupled Message Passing: Towards General and Adaptive Node Classification
Creators: name: Chen, Xuanze
name: Zhou, Jiajun
name: Yu, Shanqing
name: Xuan, Qi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph neural networks excel at graph representation learning but struggle with heterophilous data and long-range dependencies. And graph transformers address these issues through self-attention, yet face scalability and noise challenges on large-scale graphs. To overcome these limitations, we propose GNNMoE, a universal model architecture for node classification. This architecture flexibly combines fine-grained message-passing operations with a mixture-of-experts mechanism to build feature encoding blocks. Furthermore, by incorporating soft and hard gating layers to assign the most suitable expert networks to each node, we enhance the model's expressive power and adaptability to different graph types. In addition, we introduce adaptive residual connections and an enhanced FFN module into GNNMoE, further improving the expressiveness of node representation. Extensive experimental results demonstrate that GNNMoE performs exceptionally well across various types of graph data, effectively alleviating the over-smoothing issue and global noise, enhancing model robustness and adaptability, while also ensuring computational efficiency on large-scale graphs.
description: Accepted by ACM Web Conference 2025 as a short paper
Virtual Crossing Realization
Creators: name: Nelson, Sam
Publisher: name: arXiv
Year: 2003
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55A25

description: We study virtual isotopy sequences with classical initial and final diagrams, asking when such a sequence can be changed into a classical isotopy sequence by replacing virtual crossings with classical crossings. An example of a sequence for which no such virtual crossing realization exists is given. A conjecture on conditions for realizability of virtual isotopy sequences is proposed, and a sufficient condition for realizability is found. The conjecture is reformulated in terms of 2-knots and knots in thickened surfaces.
description: 21 pages, 10 figures. To appear in J. Knot Theory Ramifications. Version 6 includes revisions suggested by the reviewer
Rural Cooperatives Magazine, November/December 2006
Creators: name: Gray, Thomas W.
name: Thompson, Stephen
name: Wadsworth, James
name: Reynolds, Bruce J.
name: Chesnick, David S.
name: Gray, Thomas W.
name: Thompson, Stephen
name: Wadsworth, James
name: Reynolds, Bruce J.
name: Chesnick, David S.
Publisher: name: Unknown
Year: 2006
Subjects: Agribusiness
Community/Rural/Urban Development

description: Features - Dairy Dilemma; Promise of renewable energy focus of St. Louis conference; Outside Interests Put Money on Table; All co-ops Goes Flat; Magnifying the Message; Fading Fortune
Étienne Doublier, Jochen Johrendt, Maria Pia Alberzoni (Hg.), Der Rotulus im Gebrauch. Einsatzmöglichkeiten – Gestaltungsvarianz – Deutungen, Köln, Weimar, Wien (Böhlau) 2020
Creators: name: Holz, Stefan G.
Publisher: name: Francia-Recensio
Year: 2021

description: Étienne Doublier, Jochen Johrendt, Maria Pia Alberzoni (Hg.), Der Rotulus im Gebrauch. Einsatzmöglichkeiten – Gestaltungsvarianz – Deutungen, Köln, Weimar, Wien (Böhlau) 2020, 464 S., 35 s/w, 34 farb. Abb. (Archiv für Diplomatik, Schriftgeschichte, Siegel- und Wappenkunde. Beiheft, 19), ISBN 978-3-412-51802-8, EUR 59,99.
description: Francia-Recensio, 2021/1
Kay Davenport, The Bar Books. Manuscripts Illuminated for Renaud de Bar, Bishop of Metz (1303–1316), Turnhout (Brepols) 2017
Creators: name: Besseyre, Marianne
Publisher: name: Francia-Recensio
Year: 2021

description: Kay Davenport, The Bar Books. Manuscripts Illuminated for Renaud de Bar, Bishop of Metz (1303–1316), Turnhout (Brepols) 2017, 728 p., 242 b/w fig., 45 pl. (Manuscripta Illuminata, 2), ISBN 978-2-503-57467-7, EUR 100,00.
description: Francia-Recensio, 2021/1
Dušan Coufal, Turnaj víry. Polemika o kalich na basilejském koncilu (1431–1433), Praha (Filosofia) 2020
Creators: name: Marin, Olivier
Publisher: name: Francia-Recensio
Year: 2021

description: Dušan Coufal, Turnaj víry. Polemika o kalich na basilejském koncilu (1431–1433), Praha (Filosofia) 2020, 652 S. (Studie a prameny k dejinám myšlení v ceských zemích, 20), ISBN 978-80-7007-620-0, CZK 490,00.
description: Francia-Recensio, 2021/1
Tag Recommendation by Word-Level Tag Sequence Modeling
Creators: name: Shi, Xuewen
name: Huang, Heyan
name: Zhao, Shuyang
name: Jian, Ping
name: Tang, Yi-Kun
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper, we transform tag recommendation into a word-based text generation problem and introduce a sequence-to-sequence model. The model inherits the advantages of LSTM-based encoder for sequential modeling and attention-based decoder with local positional encodings for learning relations globally. Experimental results on Zhihu datasets illustrate the proposed model outperforms other state-of-the-art text classification based methods.
description: This is a full length version of the paper in DASFAA 2019
title: "'Girls getting it together': a study of race, class and gender through the writings of young women"
Creators: name: Griffin, Jennifer Anne
Publisher: name: The Open University
Year: 1989

description: This thesis attempts to examine the relationship between educational processes and class and gender reproduction. Such an investigation cannot avoid the ways in which racism and sexism affects the lives and schooling of young women. A significant theme running through the study addresses structuring processes within schools, the organisation of family life and the social relations of female waged labour. The study attempts to analyse the complexity of female social experience by bringing together the writings of young women across class, racial and educational boundaries. An unusual aspect of the study lies within the method of data collection. The writers who were drawn from a variety of class and ethnic backgrounds were encouraged to write about the material and emotional circumstances of their lives. The instances that are used within the study highlight the ways in which class, gender, racial and patriarchal relations produce contradiction, conflict and resistance. The act of writing is not only seen as a way of examining specific experiences, it is also seen as a means of developing cultural literacy. Working class women, girls who have moderate learning difficulties and women from ethnic minorities seldom see definitions of their own specific social world portrayed within literature. The act of writing is used to examine the material circumstances of women’s lives in relation to class and ethnic associations as well as in relation to male power relations. Finally, the thesis emphasises the significance of writing as an educational and political strategy which can be used to examine both male and female forms of consciousness.
Star Formation at z~6: The UDF-Parallel ACS Fields
Creators: name: Bouwens, R. J.
name: Illingworth, G. D.
name: Thompson, R. I.
name: Blakeslee, J. P.
name: Dickinson, M. E.
name: Broadhurst, T. J.
name: Eisenstein, D. J.
name: Fan, X.
name: Franx, M.
name: Meurer, G.
name: van Dokkum, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the i-dropouts detected in two exceptionally deep ACS fields (B_{435}, V_{606}, i_{775}, and z_{850} with 10 sigma limits of 28.8, 29.0, 28.5, and 27.8, respectively) taken in parallel with the UDF NICMOS observations. Using an i-z>1.4 cut, we find 30 i-dropouts over 21 arcmin^2 down to z_AB=28.1, or 1.4 i-dropouts arcmin^{-2}, with significant field-to-field variation (as expected from cosmic variance). This extends i-dropout searches some ~0.9^m further down the luminosity function than was possible in the GOODS field, netting a ~7x increase in surface density. An estimate of the size evolution for UV bright objects is obtained by comparing the composite radial flux profile of the bright i-dropouts (z<27.2) with scaled versions of the HDF-N + HDF-S U-dropouts. The best-fit is found with a (1+z)^{-1.57_{-0.53} ^{+0.50}} scaling in size (for fixed luminosity), extending lower redshift (1
description: 5 pages, 5 figures, accepted for publication in the Astrophysical Journal Letters, labelling to the left-hand axis of Figure 4 corrected
The sound of revolution echoes in the pleasure-boat (革命声传画舫中)
Creators: name: Wu Ziqiang 吴自强
name: Chen Songlin 陈松林
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: Revolutionary History

description: A crowd admires a replica of the pleasure-boat boarded by delegates to the First Communist Party Conference in July 1921. The title comes from a poem written by Dong Biwu (董必武), one of the delegates, on his return to the spot in 1964. Price: 14 fen
Applying human mobility and water consumption data for short-term water demand forecasting using classical and machine learning models
Creators: name: Smolak, Kamil
name: Kasieczka, Barbara
name: Wieslaw Fialkiewicz
name: Rohm, Witold
name: Siła-Nowicka, Katarzyna
name: Kopańczyk, Katarzyna
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy
subject: Plant Biology

description: Water demand forecasting is a crucial task in the efficient management of the water supply system. This paper compares classical and adapted machine learning algorithms used for water usage predictions including ARIMA, support vector regression, random forests and extremely randomized trees. These models were enriched with human mobility data to improve the predictive power of water demand forecasting. Furthermore, a framework for processing mobility data into time-series correlated with water usage data is proposed. This study uses 51 days of water consumption readings and over 7 million geolocated mobility records from urban areas. Results show that using human mobility data improves water demand prediction. The best forecasting algorithm employing a random forest method achieved 90.4% accuracy (measured by the mean absolute percentage error) and is better by 1% than the same algorithm using only water data, while classic ARIMA approach achieved 90.0%. The Blind (copying) prediction achieved 85.1% of accuracy.
Soft and anisotropic local moments in 4$d$ and 5$d$ mixed-valence M$_2$O$_9$ dimers
Creators: name: Li, Ying
name: Tsirlin, Alexander A.
name: Dey, Tusharkanti
name: Gegenwart, Philipp
name: Valenti, Roser
name: Winter, Stephen M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate via exact diagonalization of finite clusters the electronic structure and magnetism of M$_2$O$_9$ dimers in the mixed-valence hexagonal perovskites A$_3$B'M$_2$O$_9$ for various different fillings of 4$d$ and 5$d$ transition-metal M ions. We find that the magnetic moments of such dimers are determined by a subtle interplay of spin-orbit coupling, Hund's coupling, and Coulomb repulsion, as well as the electron filling of the M ions. Most importantly, the magnetic moments are anisotropic and temperature-dependent. This behavior is a result of spin-orbit coupling, magnetic field effects, and the existence of several nearly-degenerate electronic configurations whose proximity allows occupation of excited states already at room temperature. This analysis is consistent with experimental susceptibility measurements for a variety of dimer-based materials. Furthermore, we perform a survey of A$_3$B'M$_2$O$_9$ materials and propose ground-state phase diagrams for the experimentally relevant M fillings of $d^{4.5}$, $d^{3.5}$ and $d^{2.5}$. Finally, our results show that the usually applied Curie-Weiss law with a constant magnetic moment cannot be used in these spin-orbit-coupled materials.
Martine Charageat, Bernard Ribémont, Mathieu Soula, Mathieu Vivas (dir.), Résister à la justice. XIIe–XVIIIe siècles, Paris (Classiques Garnier) 2020
Creators: name: Viaut, Laura
Publisher: name: Francia-Recensio
Year: 2021

description: Martine Charageat, Bernard Ribémont, Mathieu Soula, Mathieu Vivas (dir.), Résister à la justice. XIIe–XVIIIe siècles, Paris (Classiques Garnier) 2020, 352 p. (POLEN – Pouvoirs, lettres, normes, 17), ISBN 978-2-406-09713-6, EUR 25,00.
description: Francia-Recensio, 2021/1
Partial-immunity of two-photon correlation against wavefront distortion for spatially entangled photons
Creators: name: Bajar, Kiran
name: Chatterjee, Rounak
name: Bhat, Vikas S.
name: Mujumdar, Sushil
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-dimensional quantum entanglement in photons offers notable technological advancements over traditional qubit-based systems, including increased information density and enhanced security. However, such high-dimensional states are vulnerable to disruption by complex disordered media, presenting significant challenges in practical applications. Spatially-entangled photons are conventionally generated using a nonlinear crystal via spontaneous parametric down conversion (SPDC). While the effect of disorder on spatially entangled photons in the near field of the crystal is well understood, the impact of disorder in the far field is more complex. In this work, we present a systematic study of the randomization of two-photon correlations caused by arbitrary phase distortions in the far field by breaking it down into odd and even parity components. First, we theoretically show that the two-photon field is only sensitive to the even-parity part of the phase distortion. In follow-up experiments, we employ a deformable mirror to implement random phase distortions, separating the contributions of odd and even parity phases using Zernike polynomials. The experimental results are in agreements with the theoretical predictions. Subsequently, we perform numerical simulations to show that these results extend to stronger degrees of disorder. Our key finding is that, since two-photon correlations are only affected by the even-parity component of phase modulations, the number of independent adaptive optics elements required for optimizing the correlation can be effectively halved, offering a significant practical advantage in managing disorder in quantum systems.
description: 11 pages, 9 figures
Global Euler obstruction and polar invariants
Creators: name: Seade, Jose
name: Tibar, Mihai
name: Verjovsky, Alberto
Publisher: name: arXiv
Year: 2003
Subjects: subject: Algebraic Geometry (math.AG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32S20; 14C17; 57R20; 32S65

description: For an affine complex algebraic singular space Y, we define a global Euler obstruction Eu(Y) which extends the Euler-Poincare characteristic of a nonsingular Y. Using Lefschetz pencils, we express Eu(Y) as alternating sum of global polar invariants.
description: 9 pages, 1 figure