cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A brief Review of the Scalar Field Dark Matter model
Creators: name: Magaña, Juan
name: Matos, Tonatiuh
name: Robles, Victor
name: Suárez, Abril
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In the last time the cold dark matter (CDM) model has suggested more and more that it is not able to describe all the properties of nearby galaxies that can be observed in great detail as well as that it has some problems in the mechanism by which matter is more rapidly gathered into large-scale structure such as galaxies and clusters of galaxies. In this work we revisit an alternative model, the scalar field dark matter (SFDM) model, which proposes that the galactic haloes form by condensation of a scalar field (SF) very early in the Universe, i.e., in this model the haloes of galaxies are astronomical Bose-Einstein Condensate drops of SF. On the other hand, large-scale structures like clusters or superclusters of galaxies form similar to the $Λ$CDM model, by hierarchy, thus all the predictions of the $Λ$CDM model at cosmological scales are reproduced by SFDM. This model predicts that all galaxy haloes must be very similar and exist for higher redshifts than in the $Λ$CDM model. In the first part of this review we revisit the cosmological evolution of SFDM model with a scalar potential $m^2Φ^2/2+λΦ^4/4$ with two different frameworks: the field and fluid approach. The scalar fluctuations have an oscillating growing mode and therefore, this kind of dark matter could lead to the early formation of gravitational structures in the Universe. In the last part, we study the core central density profiles of BEC dark matter haloes and fit high-resolution rotation curves of low surface brightness galaxies. The mean value of the logarithmic inner density slopes is $α= - $0.27 $\pm$ 0.18 and we show that the recent observation of the constant dark matter central surface density can be reproduced. We conclude that in light of the difficulties that the $Λ$CDM model is currently facing the SFDM model can be a worthy alternative to keep exploring further.
description: To be published in Proceedings of the XIII Mexican Workshop on Particles and Fields, 20 pages, 10 figures
BIGG - D8.4 Final report on dissemination, communication and clustering activities and results
Creators: name: Gómez, Nerea
name: Zarli, Alain
name: Schrijvers, Koen
Publisher: name: Zenodo
Year: 2023
Subjects: communication
dissemination
big data
buildings
clustering

description: The purpose of this deliverable is to describe all the communication and dissemination activities, as well as the marketing material, that were carried out throughout the project, especially during the second half of the project, aiming at guaranteeing a broad visibility and promotion of the project's activities.
This document includes a description of the project website and the social media activity, the printed and digital material, along with the main tools used to spread the word of BIGG among the stakeholders, such as press releases, newsletters, publications in professional magazines, scientific publications and participation to conferences. In addition, the section Synergies and liaisons presents the different activities carried out with identified similar projects and initiatives.
Furthermore, an overview of the current status of the communication and dissemination KPIs, a description of the completed achievements and of the encountered difficulties is provided. It is followed by a section dedicated to the long-term availability of the BIGG resources.
Magnetic Phase Diagram of CuO
Creators: name: Villarreal, R.
name: Quirion, G.
name: Plumer, M. L.
name: Poirier, M.
name: Usui, T.
name: Kimura, T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: High resolution ultrasonic velocity measurements have been used to determine the temperature -- magnetic-field phase diagram of the monoclinic multiferroic CuO. A new transition at TN3 = 230 K, corresponding to an intermediate state between the antiferromagnetic non-collinear spiral phase observed below TN2 = 229.3 K and the paramagnetic phase, is revealed. Anomalies associated with a first order transition to the commensurate collinear phase are also observed at TN1 = 213 K. For fields with B along the b axis, a spin-flop transition is detected between 11 T - 13 T at lower temperatures. Moreover, our analysis using a Landau-type free energy clearly reveals the necessity for an incommensurate collinear phase between the spiral and the paramagnetic phase. This model is also relevant to the phase diagrams of other monoclinic multiferroic systems.
description: 5 pages, 5 figures
Resonant Spin Hall Effect of Light in Random Photonic Arrays
Creators: name: Carlini, Federico
name: Cherroret, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It has been recently shown that the coherent component of light propagating in transversally disordered media, the so-called coherent mode, exhibits an optical spin Hall effect (SHE). In non-resonant materials, however, this phenomenon shows up at a spatial scale much larger than the mean free path, making its observation challenging due to the exponential attenuation of the coherent mode. Here, we show that in disordered photonic arrays exhibiting Mie resonances, the SHE on the contrary appears at a scale smaller than the mean free path if one operates in the close vicinity of the lowest transverse-magnetic resonance of the array. In combination with a weak measurement, this gives rise to a giant SHE that should be observable in optically-thin media. Furthermore, we show that by additionally exploiting the cooperative emission of a flash of light following the abrupt extinction of the incoming beam, one can achieve a time-dependent SHE, observable at large optical thickness as well.
description: 26 pages
R parity violating supersymmetric explanation for the CDF Wjj excess
Creators: name: Ghosh, Dilip Kumar
name: Maity, Manas
name: Roy, Sourov
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recently CDF has reported a 4.1 sigma excess in the distribution of the dijet invariant mass between 120-160 GeV in Wjj event sample in 7.3 fb^{-1} of data, which has generated considerable interest. We offer a possible explanation of this observation in the general framework of MSSM with R-parity violation through resonance production of tau sneutrino decaying into the LSP stau_1 and W boson. We also give the predictions of this scenario for the LHC operating at 7 TeV center of mass energy.
description: 4 pages, 2 ps figures, revtex4, typos corrected, one new reference added, version to appear in PRD
Multi-photon Rabi oscillations in high spin paramagnetic impurity
Creators: name: Bertaina, S.
name: Groll, N.
name: Chen, L.
name: Chiorescu, I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on multiple photon monochromatic quantum oscillations (Rabi oscillations) observed by pulsed EPR (Electron Paramagnetic Resonance) of Mn$^{2+}$ (S=5/2) impurities in MgO. We find that when the microwave magnetic field is similar or large than the anisotropy splitting, the Rabi oscillations have a spectrum made of many frequencies not predicted by the S=1/2 Rabi model. We show that these new frequencies come from multiple photon coherent manipulation of the multi-level spin impurity. We develop a model based on the crystal field theory and the rotating frame approximation, describing the observed phenomenon with a very good agreement.
description: International Conference: Resonance in Condensed Matter Altshuler 100
Energy dissipation and switching delay in stress-induced switching of multiferroic devices in the presence of thermal fluctuations
Creators: name: Roy, Kuntal
name: Bandyopadhyay, Supriyo
name: Atulasimha, Jayasimha
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Switching the magnetization of a shape-anisotropic 2-phase multiferroic nanomagnet with voltage-generated stress is known to dissipate very little energy ($
Mesh Refinement for Anisotropic Diffusion in Magnetized Plasmas
Creators: name: Vogl, Christopher J.
name: Joseph, Ilon
name: Holec, Milan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Highly accurate simulation of plasma transport is needed for the successful design and operation of magnetically confined fusion reactors. Unfortunately, the extreme anisotropy present in magnetized plasmas results in thin boundary layers that are expensive to resolve. This work investigates how mesh refinement strategies might reduce that expense to allow for more efficient simulation. It is first verified that higher order discretization only realizes the proper rate of convergence once the mesh resolves the thin boundary layer, motivating the focusing of refinement on the boundary layer. Three mesh refinement strategies are investigated: one that focuses the refinement across the layer by using rectangular elements with a ratio equal to the boundary layer width, one that allows for exponential growth in mesh spacing away from the layer, and one adaptive strategy utilizing the established Zienkiewicz and Zhu error estimator. Across 4 two-dimensional test cases with high anisotropy, the adaptive mesh refinement strategy consistently achieves the same accuracy as uniform refinement using orders of magnitude less degrees of freedom. In the test case where the magnetic field is aligned with the mesh, the other refinement strategies also show substantial improvement in efficiency. This work also includes a discussion generalizing the results to larger magnetic anisotropy ratios and to three-dimensional problems. It is shown that isotropic mesh refinement requires degrees of freedom on the order of either the layer width (2D) or the square of the layer width (3D), whereas anisotropic refinement requires a number on the order of the log of layer width for all dimensions. It is also shown that the number of conjugate gradient iterations scales as a power of layer width when preconditioned with algebraic multigrid, whereas the number is independent of layer width when preconditioned with ILU.
Diffractive Higgs Production by AdS Pomeron Fusion
Creators: name: Brower, Richard C.
name: Djurić, Marko
name: Tan, Chung-I
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The double diffractive Higgs production at central rapidity is formulated in terms of the fusion of two AdS gravitons/Pomerons first introduced by Brower, Polchinski, Strassler and Tan in elastic scattering. Here we propose a simple self-consistent holographic framework capable of providing phenomenologically compelling estimates of diffractive cross sections at the LHC. As in the traditional weak coupling approach, we anticipate that several phenomenological parameters must be tested and calibrated through factorization for a self-consistent description of other diffractive process such as total cross sections, deep inelastic scattering and heavy quark production in the central region.
description: 53 pages, 8 figures
Universal Quantum Computing with Spin and Valley
Creators: name: Rohling, Niklas
name: Burkard, Guido
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a two-electron double quantum dot with both spin and valley degrees of freedom as they occur in graphene, carbon nanotubes, or silicon, and regard the 16-dimensional space with one electron per dot as a four-qubit logic space. In the spin-only case, it is well known that the exchange coupling between the dots combined with arbitrary single-qubit operations is sufficient for universal quantum computation. The presence of the valley degeneracy in the electronic band structure alters the form of the exchange coupling and in general leads to spin-valley entanglement. Here, we show that universal quantum computation can still be performed by exchange interaction and single-qubit gates in the presence of the additional (valley) degree of freedom. We present an explicit pulse sequence for a spin-only controlled-NOT consisting of the generalized exchange coupling and single-electron spin and valley rotations. We also propose state preparations and projective measurements with the use of adiabatic transitions between states with (1,1) and (0,2) charge distributions similar to the spin-only case, but with the additional requirement of controlling the spin and the valley Zeeman energies by an external magnetic field. Finally, we demonstrate a universal two-qubit gate between a spin and a valley qubit, allowing universal gate operations on the combined spin and valley quantum register.
description: 18 pages, 3 figures, 1 table
Fair Trade certification and social determinants of health : the case of coffee producers in Rwanda
Creators: name: Elder, Sara Dawn Whitfield
Publisher: name: University of British Columbia
Year: 2010

description: Health of individuals and populations is now understood to be strongly influenced by social conditions and structures, yet health policy remains focused on addressing individual medical and behavioural factors instead of the more fundamental social factors that determine health. Without policies that address the social causes of health, there is a risk of not only imposing interventions that are ineffective, but also missing opportunities to adopt broader societal interventions that could produce significant health benefits for populations. For small-scale agricultural producers, one way to improve the social determinants of health is through certification systems that use production standards, monitoring, certification and labelling to identify and reward items produced under exemplary social conditions. This thesis examines the effects of Fair Trade certification, one of the most established product certification systems, on producers in order to understand its effectiveness as a market-based tool for improving the health of populations. A meta-study of the Fair Trade literature finds evidence that Fair Trade certification positively affects producer health through three main processes: improvement of material conditions (physical capital); better education (human capital); and more extended and robust social networks (social capital). Yet the research design of the reviewed studies limits the ability to conclude that benefits are the effects of certification and not associated with prior cooperative organization resulting in the adoption of certification. These shortcomings in research design were addressed through a case study of Fair Trade certified coffee producers in Rwanda. Given the importance of social structure for health outcomes, the study tested the relative importance of Fair Trade certification versus cooperative organization for producer-level social capital. Regression analyses of farmer survey data and interview responses indicate that both Fair Trade certification and cooperative organization are associated with dimensions of social capital. It seems that prior social organization matters more than certification, and how much more depends on a farmer’s particular experience of his/her producer organization. The research suggests that government and non-governmental organizations may help ensure positive effects of Fair Trade certification on the social determinants of health of producers through interventions that strengthen cooperative producer organizations.
Myotis nigricans
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis nigricans

description: Myotis nigricans.
 BRASIL (n = 3) km 42 Antigua Rodavia Río-Sao Paulo. Iguatari Municipality, Rio de Janeiro (TCWC 22811 - 13 [neotypes]).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
Slow magnetic dynamics and hysteresis loops of a bulk ferromagnet
Creators: name: Prester, M.
name: Zivkovic, I.
name: Drobac, D.
name: Surija, V.
name: Pajic, D.
name: Berger, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Magnetic dynamics of a bulk ferromagnet, a new single crystalline compound Co7(TeO3)4Br6, was studied by ac susceptibility and the related techniques. Very large Arrhenius activation energy of 17.2 meV (201 K) and long attempt time (2x10^(-4)s) span the full spectrum of magnetic dynamics inside a convenient frequency window, offering a rare opportunity for general studies of magnetic dynamics. Within the experimental window the ac susceptibility data build almost ideally semicircular Cole-Cole plots. Comprehensive study of experimental dynamic hysteresis loops of the compound is presented and interpreted within a simple thermal-activation-assisted spin lattice relaxation model for spin reversal. Quantitative agreement between the experimental results and the model's prediction for dynamic coercive field is achieved by assuming the central physical quantity, the Debye relaxation rate, to depend on frequency, as well as on the applied field strength and sample temperature. Cross-over between minor- to major hysteresis loops is carefully analyzed. Low-frequency limitations of the model, relying on domain wall pinning effects, are experimentally detected and appropriately discussed.
description: A paragraph on dynamical-hysteresis assymetry added, text partially revised; Accepted in Physical Review B
Rapidity and momentum distributions of 1D dipolar quantum gases
Creators: name: Li, Kuan-Yu
name: Zhang, Yicheng
name: Yang, Kangning
name: Lin, Kuan-Yu
name: Gopalakrishnan, Sarang
name: Rigol, Marcos
name: Lev, Benjamin L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore the effect of tunable integrability breaking dipole-dipole interactions in the equilibrium states of highly magnetic 1D Bose gases of dysprosium at low temperatures. We experimentally observe that in the strongly correlated Tonks-Girardeau regime, rapidity and momentum distributions are nearly unaffected by the dipolar interactions. By contrast, we also observe that significant changes of these distributions occur when decreasing the strength of the contact interactions. We show that the main experimental observations are captured by modeling the system as an array of 1D gases with only contact interactions, dressed by the contribution of the short-range part of the dipolar interactions. Improvements to theory-experiment correspondence will require new tools tailored to near-integrable models possessing both short and long-range interactions.
description: 5 pages, 4 figures plus supplement, as published
Clepsis peritana
Creators: name: Wieser, Christian
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Tortricidae
Clepsis
Clepsis peritana

description: Clepsis peritana (Clemens, 1861)
Brandaktuell ist ein Neufund vom 17. und 25.9.2018 auf einem Balkon in Klagenfurt in der Jantschgasse. Sigrid Strauss konnte das ursprünglich aus Nordamerika stammende Neozoon in zwei Exemplaren an Ziersalbei (aus einer Gärtnerei) ziehen. Erste Diagnose erfolgte über das Lepiforum (http://www.lepiforum.de/lepiwiki.pl? Clepsis _Peritana), ein zweites Männchen wurde mittels Genitaldetermination überprüft und konnte bestätigt werden (det. Wieser). Es ist geplant zur Absicherung einen Barcode erstellen zu lassen. Aus Spanien ist die wohl polyphage Art schon längere Zeit bekannt, weitere Funde sind mittlerweile quer durch Europa bestätigt. Laut Lepiforum wird zudem ein noch nicht bestätigter Nachweis aus der Steiermark angeführt.
description: Published as part of Wieser, Christian, 2017, Weitere Erstfunde und bemerkenswerte Schmetterlingsnachweise aus Kärnten (Insecta: Lepidoptera), pp. 285-291 in Rudolfinum – Jahrbuch des Landesmuseums für Kärnten 2017 on page 289, DOI: 10.5281/zenodo.5725317
Myotis oxyotus subsp. oxyotus
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis oxyotus
Myotis oxyotus oxyotus

description: Myotis oxyotus oxyotus.
 ECUADOR (n = 3): Carchi, Gruta Rumichaca, 2 mi ELa Paz (TCWC 12703-04, TCWC 12706 [neotypes]). PERU (n = 4) Huánuco, 10 Km N. Acomayo Bosque Unchog (MSB 49971-72); Huánuco 9 min S Huánuco (TCWC 12710-11).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
Self-tuning and the derivation of the Fab Four
Creators: name: Charmousis, Christos
name: Copeland, Edmund J.
name: Padilla, Antonio
name: Saffin, Paul M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have recently proposed a special class of scalar tensor theories known as the Fab Four. These arose from attempts to analyse the cosmological constant problem within the context of Horndeski's most general scalar tensor theory. The Fab Four together give rise to a model of self-tuning, with the relevant solutions evading Weinberg's no-go theorem by relaxing the condition of Poincare invariance in the scalar sector. The Fab Four are made up of four geometric terms in the action with each term containing a free potential function of the scalar field. In this paper we rigorously derive this model from the general model of Horndeski, proving that the Fab Four represents the only classical scalar tensor theory of this type that has any hope of tackling the cosmological constant problem. We present the full equations of motion for this theory, and give an heuristic argument to suggest that one might be able to keep radiative corrections under control. We also give the Fab Four in terms of the potentials presented in Deffayet et al's version of Horndeski.
description: 25 pages, 1 figure
Observation of gauge boson joint-polarisation states in $W^{\pm}Z$ production from $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements of joint-polarisation states of $W$ and $Z$ gauge bosons in $W^{\pm}Z$ production are presented. The data set used corresponds to an integrated luminosity of $139$ fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of $13$ TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. The $W^{\pm}Z$ candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The simultaneous pair-production of longitudinally polarised vector bosons is measured for the first time with a significance of $7.1$ standard deviations. The measured joint helicity fractions integrated over the fiducial region are $f_{\mathrm{00}} = 0.067 \pm 0.010$, $f_{\mathrm{0T}} = 0.110 \pm 0.029$, $f_{\mathrm{T0}} = 0.179 \pm 0.023$ and $f_{\mathrm{TT}} = 0.644 \pm 0.032$, in agreement with the next-to-leading-order Standard Model predictions. Individual helicity fractions of the $W$ and $Z$ bosons are also measured and found to be consistent with joint helicity fractions within the expected amount of correlations. Both the joint and individual helicity fractions are also measured separately in $W^+Z$ and $W^-Z$ events. Inclusive and differential cross sections for several kinematic observables sensitive to polarisation are presented.
description: 28 pages in total, 5 figures, 5 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2022-01
Geometry of non-holonomic diffusion
Creators: name: Hochgerner, Simon
name: Ratiu, Tudor S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: Primary 37Jxx, 58J65, Secondary 93Exx

description: We study stochastically perturbed non-holonomic systems from a geometric point of view. In this setting, it turns out that the probabilistic properties of the perturbed system are intimately linked to the geometry of the constraint distribution. For $G$-Chaplygin systems, this yields a stochastic criterion for the existence of a smooth preserved measure. As an application of our results we consider the motion planning problem for the noisy two-wheeled robot and the noisy snakeboard.
New techniques to solve the 1-dimensional random flight
Creators: name: García-Pelayo, Ricardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: G.3
subject: 60G50, 60G50, 82B41

description: We present here two new techniques to solve the one-dimensional random flight. The first one is an expansion in the number of collisions. The second one is the obtention of a Fourier series. This second technique can be applied to an arbitrary number of dimensions. Some mathematical identities are obtained.
description: 12 pages, 2 figures
Compact object mergers: exploring uncertainties from stellar and binary evolution with SEVN
Creators: name: Iorio, Giuliano
name: Mapelli, Michela
name: Costa, Guglielmo
name: Spera, Mario
name: Escobar, Gastón J.
name: Sgalletta, Cecilia
name: Trani, Alessandro A.
name: Korb, Erika
name: Santoliquido, Filippo
name: Dall'Amico, Marco
name: Gaspari, Nicola
name: Bressan, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Population-synthesis codes are an unique tool to explore the parameter space of massive binary star evolution and binary compact object (BCO) formation. Most population-synthesis codes are based on the same stellar evolution model, limiting our ability to explore the main uncertainties. Here, we present the new version of the code SEVN, which overcomes this issue by interpolating the main stellar properties from a set of pre-computed evolutionary tracks. We describe the new interpolation and adaptive time-step algorithms of SEVN, and the main upgrades on single and binary evolution. With SEVN, we evolved $1.2\times10^9$ binaries in the metallicity range $0.0001\leq Z \leq 0.03$, exploring a number of models for electron-capture, core-collapse and pair-instability supernovae, different assumptions for common envelope, stability of mass transfer, quasi-homogeneous evolution and stellar tides. We find that stellar evolution has a dramatic impact on the formation of single and binary compact objects. Just by slightly changing the overshooting parameter ($λ_{\rm ov}=0.4,0.5$) and the pair-instability model, the maximum mass of a black hole can vary from $\approx{60}$ to $\approx{100}\ \mathrm{M}_\odot$. Furthermore, the formation channels of BCOs and the merger efficiency we obtain with SEVN show significant differences with respect to the results of other population-synthesis codes, even when the same binary-evolution parameters are used. For example, the main traditional formation channel of BCOs is strongly suppressed in our models: at high metallicity ($Z\gtrsim{0.01}$) only $<20$% of the merging binary black holes and binary neutron stars form via this channel, while other authors found fractions $>70$%. The local BCO merger rate density of our fiducial models is consistent with the most recent estimates by the LIGO--Virgo--KAGRA collaboration.
description: Accepted for publication in MNRAS. The SEVN code is available at https://gitlab.com/sevncodes/sevn.git. All the data underlying this article are available in Zenodo at the link https://doi.org/10.5281/zenodo.7794546. All the Jupyter notebooks used to produce the plots in the paper are available in the gitlab repository https://gitlab.com/iogiul/iorio22_plot.git
The minimal 3+2 neutrino model versus oscillation anomalies
Creators: name: Donini, A.
name: Hernandez, P.
name: Lopez-Pavon, J.
name: Maltoni, M.
name: Schwetz, T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the constraints imposed by neutrino oscillation experiments on the minimal extension of the Standard Model that can explain neutrino masses, which requires the addition of just two singlet Weyl fermions. The most general renormalizable couplings of this model imply generically four massive neutrino mass eigenstates while one remains massless: it is therefore a minimal 3+2 model. The possibility to account for the confirmed solar, atmospheric and long-baseline oscillations, together with the LSND/MiniBooNE and reactor anomalies is addressed. We find that the minimal model can fit oscillation data including the anomalies better than the standard $3ν$ model and similarly to the 3+2 phenomenological models, even though the number of free parameters is much smaller than in the latter. Accounting for the anomalies in the minimal model favours a normal hierarchy of the light states and requires a large reactor angle, in agreement with recent measurements. Our analysis of the model employs a new parametrization of seesaw models that extends the Casas-Ibarra one to regimes where higher order corrections in the light-heavy mixings are significant.
description: 18 pages
Motherland: Country of the Healer, Country of the Healed
Creators: name: Rushton, Chelsea
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Fine Arts
subject: Autopsychotherapy
subject: Craft
subject: Duality
subject: Ecology
subject: FOS: Biological sciences
subject: Embroidery
subject: Goddess
subject: India
subject: Meditation
subject: Metaphysics
subject: Relation
subject: Spirituality

description: In support of my thesis project and exhibition, Motherland: Country of the Healer, Country of the Healed, this paper contextualizes Motherland, a 66” x 66” hand embroidery on Belgian linen that evolved from a growing body of vision drawings, small gouache and graphite compositions sketched intuitively after meditation, as part of a continuing venture to reconcile the position of self in the world. Motherland functions as a work of art, a work of craft, a therapeutic process, and a meditative discipline, to raise and address questions about how humans participate in an expanded reality. The metaphysical landscape Motherland depicts speaks to the universal condition of birth and death. The response it offers to this condition is a possibility. The project itself envisions a collective attitude of relatedness: being in the world harmoniously, and facilitating reciprocal relationships with the natural world, spirit, each other, and ourselves.
SAH: Shifting-aware Asymmetric Hashing for Reverse $k$-Maximum Inner Product Search
Creators: name: Huang, Qiang
name: Wang, Yanhao
name: Tung, Anthony K. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Databases (cs.DB)
subject: Data Structures and Algorithms (cs.DS)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper investigates a new yet challenging problem called Reverse $k$-Maximum Inner Product Search (R$k$MIPS). Given a query (item) vector, a set of item vectors, and a set of user vectors, the problem of R$k$MIPS aims to find a set of user vectors whose inner products with the query vector are one of the $k$ largest among the query and item vectors. We propose the first subquadratic-time algorithm, i.e., Shifting-aware Asymmetric Hashing (SAH), to tackle the R$k$MIPS problem. To speed up the Maximum Inner Product Search (MIPS) on item vectors, we design a shifting-invariant asymmetric transformation and develop a novel sublinear-time Shifting-Aware Asymmetric Locality Sensitive Hashing (SA-ALSH) scheme. Furthermore, we devise a new blocking strategy based on the Cone-Tree to effectively prune user vectors (in a batch). We prove that SAH achieves a theoretical guarantee for solving the RMIPS problem. Experimental results on five real-world datasets show that SAH runs 4$\sim$8$\times$ faster than the state-of-the-art methods for R$k$MIPS while achieving F1-scores of over 90\%. The code is available at \url{https://github.com/HuangQiang/SAH}.
description: Accepted by AAAI 2023
Mercury in artisanal and small scale gold mining : identifying strategies to reduce environmental contamination in Southern Ecuador
Creators: name: Velásquez López, Patricio Colón
Publisher: name: University of British Columbia
Year: 2010

description: This investigation builds on research about mercury use in custom processing centers in Portovelo-Zaruma Southern Ecuador, where around 3000 people are directly involved to produce around 9 tonnes/annum of gold. The lack of understanding about mercury dynamics during gold processing reduces the development of appropriate solutions to mitigate the environmental contamination. The analysis of the amalgamation systems in 8 centers indicated that 12 to 40% of the total mercury used in the process has been evaporated when amalgams are burned, 40 to 60% of mercury has been recovered and 1 to 35% of mercury has been lost with the tailings. The amalgamation of the whole ore in barrels (“Chanchas”) contributes to the highest concentrations of mercury in tailings (350 ppm Hg). Around 1.5 tonnes/annum of mercury has been likely released to the environment in Portovelo from which 71% goes to the air and the remaining mercury enters the cyanidation process. As amalgamation does not extract all the gold present in the ore, the mercury rich-tailings are processed with cyanide preferentially through Merrill-Crowe or Carbon in Pulp (CIP) system. The analysis of 7 cyanidation processing plants revealed that 51% and 14% of mercury is released as dissolved mercury from CIP and the Merrill-Crowe process respectively. Approximately 27% of mercury is released to the atmosphere with the Merrill-Crowe when zinc shavings are burned. The CIP process releases 3.72% of mercury during carbon elution. A laboratory cyanidation test confirmed that mercury dissolution from tailings is much slower than gold dissolution. The established division of labor in place among miners and owners of processing centers forces the use of mercury in amalgamation combined with cyanide leaching. As miners do not understand the actual process, they accept low levels of gold recovery by amalgamation, leaving the rich tailings to the owners of processing centers. This generates dependency on mercury and reduces the opportunity to improve the system. One lesson gleaned from this study is that a participatory integrated assessment approach may contribute to learning, increasing awareness, and it can help identify practical and effective options for reducing mercury contamination in artisanal gold mining operations.
Dissipative Symmetry-Protected Topological Order
Creators: name: Veríssimo, Luan M.
name: Lyra, Marcelo L.
name: Orus, Roman
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this work, we investigate the interplay between dissipation and symmetry-protected topological order. We considered the one-dimensional spin-1 Affleck-Kennedy-Lieb-Tasaki model interacting with an environment where the dissipative dynamics are described by the Lindladian master equation. The Markovian dynamics is solved by the implementation of a tensor network algorithm for mixed states in the thermodynamic limit. We observe that, for time-reversal symmetric dissipation, the resulting steady state has topological signatures even if being a mixed state. This is seen in finite string-order parameters as well as in the degeneracy pattern of singular values in the tensor network decomposition of the reduced density matrix. We also show that such features do not appear for non-symmetric dissipation. Our work opens the way toward a generalized and more practical definition of symmetry-protected topological order for mixed states induced by dissipation.
description: 5 pages, 5 figure, revised version
Locally anisotropic momentum distributions of hadrons at freeze-out in relativistic heavy-ion collisions
Creators: name: Rybczyński, Maciej
name: Florkowski, Wojciech
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A spheroidal anisotropic local momentum distribution is implemented in the statistical model of hadron production. We show that this form leads to exactly the same ratios of hadronic abundances as the equilibrium distributions, if the temperature is identified with a characteristic transverse-momentum scale. Moreover, to a very good approximation the transverse-momentum spectra of hadrons are the same for isotropic and anisotropic systems, provided the size of the system at freeze-out is appropriately adjusted. We further show that this invariance may be used to improve the agreement between the model and experimental HBT results.
description: 7 pages, 4 figures
PIDs in the era of AI: service provider perspectives
Creators: name: Takano, Yasutomo
name: Miyairi, Nobuko
name: Mejia, Cristian
Publisher: name: Zenodo
Year: 2019
Subjects: AI, automatic summarization

description: PIDs bring a great potential for AI-based scholarly tools and services with their interoperability and machine-readability. The output from AI can be presented as derivatives or even new, original contents that may require another PID. Taking an example of Paper Digest (https://www.paper-digest.com), our own AI-based service, we will discuss the challenges we meet in our development and how PIDs could help overcome those challenges.
description: Acknowledgements: In October 2018, Paper Digest received the Catalyst Grant by Digital Science. We are very honored to receive this global recognition. The generous support provided by Digital Science will help accelerate our development and expand collaboration opportunities.
Integrating out the heaviest quark in N--flavour ChPT
Creators: name: Ivanov, Mikhail A.
name: Schmid, Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We extend a known method to integrate out the strange quark in three flavour chiral perturbation theory to the context of an arbitrary number of flavours. As an application, we present the explicit formulae to one--loop accuracy for the heavy quark mass dependency of the low energy constants after decreasing the number of flavours by one while integrating out the heaviest quark in N--flavour chiral perturbation theory.
description: 18 pages, 1 figure. Text and references added. To appear in EPJC
A framework for structural shape optimization based on automatic differentiation, the adjoint method and accelerated linear algebra
Creators: name: Wu, Gaoyuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Software (cs.MS)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Shape optimization is of great significance in structural engineering, as an efficient geometry leads to better performance of structures. However, the application of gradient-based shape optimization for structural and architectural design is limited, which is partly due to the difficulty and the complexity in gradient evaluation. In this work, an efficient framework based on automatic differentiation (AD), the adjoint method and accelerated linear algebra (XLA) is proposed to promote the implementation of gradient-based shape optimization. The framework is realized by the implementation of the high-performance computing (HPC) library JAX. We leverage AD for gradient evaluation in the sensitivity analysis stage. Compared to numerical differentiation, AD is more accurate; compared to analytical and symbolic differentiation, AD is more efficient and easier to apply. In addition, the adjoint method is used to reduce the complexity of computation of the sensitivity. The XLA feature is exploited by an efficient programming architecture that we proposed, which can boost gradient evaluation. The proposed framework also supports hardware acceleration such as GPUs. The framework is applied to the form finding of arches and different free-form gridshells: gridshell inspired by Mannheim Multihalle, four-point supported gridshell, and canopy-like structures. Two geometric descriptive methods are used: non-parametric and parametric description via Bézier surface. Non-constrained and constrained shape optimization problems are considered, where the former is solved by gradient descent and the latter is solved by sequential quadratic programming (SQP). Through these examples, the proposed framework is shown to be able to provide structural engineers with a more efficient tool for shape optimization, enabling better design for the built environment.
Myotis pilosatibialis
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis pilosatibialis

description: Myotis pilosatibialis.
 EL SALVADOR (n = 6) Ahuachapán, El Imposible, San Francisco Méndez (ROM 101273*), Santa Ana, Parque Nacional Montecristo, Bosque Nebuloso (ROM 101352*, 101357*, 101430*), Santa Ana, Parque Nacional Montecristo, Los Planes (ROM 101467*), Santa Ana, Hacienda Escuintla (TTU 60981*). HONDURAS (n = 7): Francisco Morazán, 1 km W of Talanga (LACM 36879* [holotype], TCWC 24101-24105 [paratypes]); Cortés, Omoa, 5.5 km southeast of Cuyamel, Santo Domingo (AMNH 265126). GUATEMALA (3): Petén Department, 12 km of Chinaja (KU 82105,82108,82109). MEXICO (n = 1): San Luis Potosí (TTU 35360*).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
Effective Free Energy for Individual Dynamics
Creators: name: Grauwin, Sebastian
name: Hunt, Dominic
name: Bertin, Eric
name: Jensen, Pablo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Physics and economics are two disciplines that share the common challenge of linking microscopic and macroscopic behaviors. However, while physics is based on collective dynamics, economics is based on individual choices. This conceptual difference is one of the main obstacles one has to overcome in order to characterize analytically economic models. In this paper, we build both on statistical mechanics and the game theory notion of Potential Function to introduce a rigorous generalization of the physicist's free energy, which includes individual dynamics. Our approach paves the way to analytical treatments of a wide range of socio-economic models and might bring new insights into them. As first examples, we derive solutions for a congestion model and a residential segregation model.
description: 8 pages, 2 figures, presented at the ECCS'10 conference
A Phenomenological Investigation of Newcomer Youths’ Experiences of Integration into High School and Transition to Post-Secondary Education in Canada
Creators: name: Gallucci, Alissa
Publisher: name: Graduate Studies
Year: 2016
Subjects: Educational Psychology

description: Integration into the school system often represents the first point of contact with the host society for newcomer youth. Their long-term contributions to Canadian society are largely dependent on their experiences integrating into high school. This descriptive phenomenology aimed to develop an in-depth, contextual understanding of newcomer youth’s integration into high school and transition to post-secondary education. Ten graduated high school students, ages18 through 24, who migrated and attended high school in Canada were interviewed. The central research questions include: What factors throughout high school impact participants’ experiences of school integration? And (b) How did participants’ experiences of school integration impact their transition into post-secondary education? Data analysis revealed five structures: (a) school atmosphere; (b) language transition; (c) curriculum; (d) post-secondary decisions; and (e) post-secondary experience. Implications for counselling and practice, as well as, directions for future research are presented as they pertain to the school integration of newcomer youth.
The Intersection of Early Childhood Caries and Domestic Violence: How Dentists and Dental Hygienists in Alberta Frame the Issue
Creators: name: Guardia Tello, Carola
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Public Health
subject: domestic violence
subject: early childhood caries
subject: dentists
subject: dental hygienists

description: This study explored points of view from dentists and dental hygienists in Alberta along with national and provincial experts in public health dentistry and domestic violence prevention about two important topics: Early Childhood Caries (ECC) and Domestic Violence (DV). Semi-structured interviews were used and the results showed a general consensus that dentists and dental hygienists do not consider that ECC and DV intersect. As a result, intervention at this level will be very difficult to implement, since the existence of the problem is not recognized. This study identified gaps in practice, knowledge, education, research interest and intersectoral and interdisciplinary action that need to be addressed.