cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Iniciação de estudantes do ensino médio ao método filosófico intuitivo bergsoniano: relato de experiência
Creators: name: Corrêa de Araújo, Maria Alice
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 500309
subject: Metaphysics

description: Relata uma experiência de intervenção filosófica no ensino médio, realizada em uma escola da rede pública do estado de Pernambuco, Recife-PE, em 2018, cujo propósito foi iniciar os estudantes ao método filosófico intuitivo bergsoniano. O objeto da pesquisa é a iniciação de estudantes do ensino médio ao método filosófico intuitivo bergsoniano. Tentaremos responder ao seguinte problema: como iniciar estudantes do ensino médio ao método filosófico intuitivo bergsoniano? Temos como objetivo geral iniciar estudantes do ensino médio ao método filosófico intuitivo bergsoniano. São objetivos específicos: I. compreender o método filosófico intuitivo a partir da obra “O pensamento e o movente”, de Henri Bergson; II. criar uma metodologia para iniciação dos estudantes de ensino médio ao método filosófico intuitivo bergsoniano; III. fundamentar uma experiência filosófica de iniciação de estudantes do ensino médio ao método filosófico intuitivo bergsoniano. Como hipótese, defendíamos a possibilidade de iniciarmos os estudantes ao método filosófico intuitivo bergsoniano a partir do estudo do método e criação de metodologia para este fim, e assim aconteceu. Concluímos: I. O método filosófico intuitivo bergsoniano é fundamentado em nove princípios e defende a possibilidade de atingirmos precisamente a realidade, desde que invertamos a direção habitual do trabalho do pensamento, para irmos da experiência metafísica à criação de conceitos, em vez de aplicarmos conceitos rígidos à vida; II. Criamos seis formas para mediar a iniciação dos estudantes de ensino médio ao método filosófico intuitivo bergsoniano, relacionando-as às suas devidas contribuições ao aprendizado filosófico; IV: A experiência filosófica demonstrou que alguns estudantes foram iniciados no método filosófico intuitivo bergsoniano considerando que se aproximaram daquilo que há de espiritual na vida, invertendo a direção habitual do trabalho do pensamento.
A Method of Improving Standard Stellar Luminosities with Multiband Standard Bolometric Corrections
Creators: name: Bakış, Volkan
name: Eker, Zeki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Standard luminosity ($L$) of 406 main-sequence stars with the most accurate astrophysical parameters are predicted from their absolute magnitudes and bolometric corrections at Johnson $B,V$, and Gaia EDR3 $G$, $G_{BP}$, $G_{RP}$ filters. Required multiband $BC$ and $BC-T_{eff}$ relations are obtained first from the parameters of 209 DDEB (Double-lined Detached Eclipsing Binaries) with main-sequence components and Gaia EDR3 parallaxes. A simplified SED is formulated to give filter dependent component light contributions and interstellar dimming, which are essential in computing $BC$ of a component virtually at any filter. The mean standard $L$ of a star is calculated from the mean $M_{Bol}$ which is a mathematical average of independent $M_{Bol}$ values predicted at different filters, while the uncertainty of $L$ is the uncertainty propagated from the uncertainty of the mean $M_{Bol}$. The mean standard $L$ of the sample stars are compared to the corresponding $L$ values according to the Stefan-Boltzmann law. A very high correlation ($R^2>0.999$) is found. Comparing histogram distributions of errors shows that uncertainties associated with the mean standard $L$ (peak at $\sim2.5$ per cent) are much smaller than the uncertainties of $L$ (peak at $\sim8$ per cent) by the Stefan-Boltzmann law. Increasing the number of filters used in predicting the mean $M_{Bol}$ increases the accuracy of the standard stellar luminosity. Extinction law, color-color relations and color excess - color excess relations for Gaia passbands are demonstrated for main-sequence stars for the first time.
description: After submitting minor revision in Acta Astronomica on August 8th, 2022. Tables will be available as online supplementary material
RDA: Reciprocal Distribution Alignment for Robust Semi-supervised Learning
Creators: name: Duan, Yue
name: Qi, Lei
name: Wang, Lei
name: Zhou, Luping
name: Shi, Yinghuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work, we propose Reciprocal Distribution Alignment (RDA) to address semi-supervised learning (SSL), which is a hyperparameter-free framework that is independent of confidence threshold and works with both the matched (conventionally) and the mismatched class distributions. Distribution mismatch is an often overlooked but more general SSL scenario where the labeled and the unlabeled data do not fall into the identical class distribution. This may lead to the model not exploiting the labeled data reliably and drastically degrade the performance of SSL methods, which could not be rescued by the traditional distribution alignment. In RDA, we enforce a reciprocal alignment on the distributions of the predictions from two classifiers predicting pseudo-labels and complementary labels on the unlabeled data. These two distributions, carrying complementary information, could be utilized to regularize each other without any prior of class distribution. Moreover, we theoretically show that RDA maximizes the input-output mutual information. Our approach achieves promising performance in SSL under a variety of scenarios of mismatched distributions, as well as the conventional matched SSL setting. Our code is available at: https://github.com/NJUyued/RDA4RobustSSL.
description: Accepted by ECCV 2022
Light-matter entanglement after above-threshold ionization processes in atoms
Creators: name: Rivera-Dean, Javier
name: Stammer, Philipp
name: Maxwell, Andrew S.
name: Lamprou, Theocharis
name: Tzallas, Paraskevas
name: Lewenstein, Maciej
name: Ciappina, Marcelo F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Light-matter entanglement plays a fundamental role in many applications of quantum information science. Thus, finding processes where it can be observed is an important task. Here, we address this matter by theoretically investigating the entanglement between light and electrons generated in above-threshold ionization (ATI) process. The study is based on the back-action of the ATI process on the quantum optical state of the system, and its dependence on the kinetic energy and direction of the emitted photoelectrons. Taking into account the dynamics of the process, we demonstrate the creation of hybrid entangled states. The amount of entanglement has been studied in terms of the entropy of entanglement. Additionally, we use the Wigner function of the driving field mode to motivate the entanglement characterization when considering electrons propagating in opposite directions.
description: 20 pages (13 main text + 7 supplementary material), 8 figures (6 main text + 2 supplementary material). Comments are welcome
Light-induced translation symmetry breaking via nonlinear phononics
Creators: name: Pueyo, Adrián Gómez
name: Subedi, Alaska
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Light has a wavelength that is usually longer than the size of the unit cell of crystals. Hence, even intense light pulses are not expected to break the translation symmetry of materials. However, certain materials, including KTaO$_3$, exhibit peaks in their Raman spectra corresponding to their Brillouin zone boundary phonons due to second-order Raman processes, which provide a mechanism to drive these phonons using intense midinfrared lasers. We investigated the possibility of breaking the translation symmetry of KTaO$_3$ by driving its highest-frequency transverse optic mode $Q_{\textrm{HX}}$ at the $X$ $(0,\frac{1}{2},0)$ point. Our first principles calculations show that the energy curve of the transverse acoustic mode $Q_{\textrm{LZ}}$ at $X$ softens and develops a double-well shape as the value of the $Q_{\textrm{HX}}$ coordinate is increased, while that of the other transverse acoustic component $Q_{\textrm{LX}}$ hardens when the value of the $Q_{\textrm{HX}}$ coordinate is similarly varied. We performed similar total energy calculations as a function of the $Q_{\textrm{HX}}$ coordinate and electric field to extract the nonlinear coupling between them. These were then used to construct the coupled equations of motion for the three phonon coordinates in the presence of an external pump term on the $Q_{\textrm{HX}}$ mode, which we numerically solved for a range of pump frequencies and amplitudes. We find that 465 MV/cm is the smallest pump amplitude that leads to an oscillation of the $Q_{\textrm{LZ}}$ mode at a displaced position, hence, breaking the translation symmetry of the material. Such highly intense light pulses cannot be generate by currently available laser sources, and they have the possibility to damage the material. Nevertheless, our work shows that light can in principle be used to break the translation symmetry of a material via nonlinear phononics.
Searching for Propionamide (C2H5CONH2) Toward Sagittarius B2 at Centimeter Wavelengths
Creators: name: Schuessler, Caden
name: Remijan, Anthony
name: Xue, Ci
name: Carder, Joshua
name: Scolati, Haley
name: McGuire, Brett
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The formation of molecules in the interstellar medium (ISM) remains a complex and unresolved question in astrochemistry. A group of molecules of particular interest involves the linkage between a -carboxyl and -amine group, similar to that of a peptide bond. The detection of molecules containing these peptide-like bonds in the ISM can help elucidate possible formation mechanisms, as well as indicate the level of molecular complexity available within certain regions of the ISM. Two of the simplest molecules containing a peptide-like bond, formamide (NH2CHO) and acetamide (CH3CONH2), have previously been detected toward the star forming region Sagittarius B2 (Sgr B2). Recently, the interstellar detection of propionamide (C2H5CONH2) was reported toward Sgr B2(N) with ALMA observations at millimeter wavelengths. Yet, this detection has been questioned by others from the same set of ALMA observations as no statistically significant line emission was identified from any uncontaminated transitions. Using the PRrbiotic Interstellar MOlecule Survey (PRIMOS) observations, we report an additional search for C2H5CONH2 at centimeter wavelengths conducted with the Green Bank Telescope. No spectral signatures of C2H5CONH2 were detected. An upper limit for C2H5CONH2 at centimeter wavelengths was determined to be less than 1.8e14 cm-2 and an upper limit to the C2H5CONH2/CH3CONH2 ratio is found to be less than 2.34. This work again questions the initial detection of C2H5CONH2 and indicates that more complex peptide-like structures may have difficulty forming in the ISM or are below the detection limits of current astronomical facilities. Additional structurally related species are provided to aid in future laboratory and astronomical searches.
description: 21 Pages, 5 Figures, 5 Tables
On the estimation of moisture permeability and advection coefficients of a wood fibre material using the optimal experiment design approach
Creators: name: Berger, Julien
name: Busser, Thomas
name: Dutykh, Denys
name: Mendes, Nathan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 35R30 (primary), 35K05, 80A20, 65M32 (secondary)

description: This paper presents a practical application of the concept of Optimal Experiment Design (OED) for the determination of properties of porous materials with in-situ measurements and an identification method. First, an experimental set-up was presented and used for the measurement of relative humidity within a wood fibre material submitted to single and multiple steps of relative humidity variation. Then, the application of OED enabled to plan the experimental conditions in terms of sensor positioning and boundary conditions out of 20 possible designs. The OED search was performed using the Fisher information matrix and a priori knowledge of the parameters. It ensures to provide the best accuracy of the identification method and thus the estimated parameter. Optimal design results have been found for single steps from the relative humidity phi = 10 to 75%, with one sensor located at the position X between 4 and 6 cm, for the estimation of moisture permeability coefficients, while from phi = 75% to phi = 33%, with one sensor located at X° = 3 cm, for the estimation of the advection coefficient. The OED has also been applied for the identification of couples of parameters. A sample submitted to multiple relative humidity steps (phi = 10-75-33-75%) with a sensor placed at X° = 5 cm was found as the best option for determining both properties with the same experiment. These OED parameters have then been used for the determination of moisture permeability and advection coefficients. The estimated moisture permeability coefficients are twice higher than the a priori values obtained using standard methods. The advection parameter corresponds to the mass average velocity of the order of v = 0.01 mm/s within the material and may play an important role on the simulation of moisture front.
description: 34 pages, 14 figures, 6 tables, 43 references. Other author's papers can be downloaded at http://www.denys-dutykh.com/. arXiv admin note: text overlap with arXiv:1704.06565
Probing Lepton Flavor Violation at the 13 TeV LHC
Creators: name: Primulando, Reinard
name: Uttayarat, Patipan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the bounds on tau-mu lepton flavor violation (LFV). Our main focus is on the collider constrains on tau-mu LFV. We use the Type-III Two-Higgs-Doublet-Model (2HDM) as a set up for our study. While the LFV branching fraction of the 125 GeV is well constrained by current LHC searches, the heavier neutral states could have a large branching fraction to tau and muon. We estimate the LHC reach for the 13 TeV center of mass energy with 300 $\text{fb}^{-1}$ luminosity for a neutral boson decaying into a tau and a muon. We identify parts of the LFV parameter space where the searches for heavy scalar and pseudoscalar decaying into a tau and a muon are more sensitive than the similar search for the 125 GeV boson.
description: 29 + 3 pages, 23 figures. Version 2 expanded discussion of low energy constraints and added more references. Matched the JHEP version
Three-point functions of higher-spin supercurrents in 4D ${\cal N}=1$ superconformal field theory
Creators: name: Buchbinder, Evgeny I.
name: Hutomo, Jessica
name: Tartaglino-Mazzucchelli, Gabriele
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a general formalism to study the three-point correlation functions of conserved higher-spin supercurrent multiplets $J_{α(r) \dotα(r)}$ in 4D ${\cal N}=1$ superconformal theory. All the constraints imposed by ${\cal N}=1$ superconformal symmetry on the three-point function $\langle J_{α(r_1) \dotα(r_1)} J_{β(r_2) \dotβ(r_2) }J_{γ(r_3) \dotγ(r_3)}\rangle$ are systematically derived for arbitrary $r_1, r_2, r_3$, thus reducing the problem mostly to computational and combinatorial. As an illustrative example, we explicitly work out the allowed tensor structures contained in $\langle J_{α(r) \dotα(r)} J_{β\dotβ } J_{γ\dotγ}\rangle$, where $J_{α\dotα}$ is the supercurrent. We find that this three-point function depends on two independent tensor structures, though the precise form of the correlator depends on whether $r$ is even or odd. The case $r=1$ reproduces the three-point function of the ordinary supercurrent derived by Osborn. Additionally, we present the most general structure of mixed correlators of the form $\langle L L J_{α(r) \dotα(r)}\rangle$ and $\langle J_{α(r_1) \dotα(r_1)} J_{β(r_2) \dotβ(r_2)} L \rangle$, where $L$ is the flavour current multiplet.
description: 51 pages; v2: references added
The neutron skin thickness of $^{48}$Ca from a nonlocal-dispersive-optical-model analysis
Creators: name: Mahzoon, M. H.
name: Atkinson, M. C.
name: Charity, R. J.
name: Dickhoff, W. H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A nonlocal dispersive-optical-model analysis has been carried out for neutrons and protons in $^{48}$Ca. Elastic-scattering angular distributions, total and reaction cross sections, single-particle energies, the neutron and proton numbers, and the charge distribution have been fitted to extract the neutron and proton self-energies both above and below the Fermi energy. From the single-particle propagator resulting from these self-energies we have determined the charge and neutron matter distributions in $^{48}$Ca. A neutron skin of 0.249$\pm$0.023~fm is deduced. The energy dependence of the total neutron cross sections is shown to have strong sensitivity to the skin thickness.
description: 5 pages, 4 figures
Probing QCD critical fluctuations from light nuclei production in relativistic heavy-ion collisions
Creators: name: Sun, Kai-Jia
name: Chen, Lie-Wen
name: Ko, Che Ming
name: Xu, Zhangbu
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Based on the coalescence model for light nuclei production, we show that the yield ratio $\mathcal{O}_\text{p-d-t} = N_{^3\text{H}} N_p / N_\text{d}^2$ of $p$, d, and $^3$H in heavy-ion collisions is sensitive to the neutron relative density fluctuation $Δn= \langle (δn)^2\rangle/\langle n\rangle^2$ at kinetic freeze-out. From recent experimental data in central Pb+Pb collisions at $\sqrt{s_{NN}}=6.3$~GeV, $7.6$~GeV, $8.8$~GeV, $12.3$~GeV and $17.3$~GeV measured by the NA49 Collaboration at the CERN Super Proton Synchrotron (SPS), we find a possible non-monotonic behavior of $Δn$ as a function of the collision energy with a peak at $\sqrt{s_{NN}}=8.8$~GeV, indicating that the density fluctuations become the largest in collisions at this energy. With the known chemical freeze-out conditions determined from the statistical model fit to experimental data, we obtain a chemical freeze-out temperature of $\sim 144~$MeV and baryon chemical potential of $\sim 385~$MeV at this collision energy, which are close to the critical endpoint in the QCD phase diagram predicted by various theoretical studies. Our results thus suggest the potential usefulness of the yield ratio of light nuclei in relativistic heavy-ion collisions as a direct probe of the large density fluctuations associated with the QCD critical phenomena.
description: 6 pages, 1 figure, 2 tables. Correlations between neutron and proton density fluctuations considered and presentation improved. Accepted version to appear in PLB
On the new universality class in structurally disordered $n$-vector model with long-range interactions
Creators: name: Shapoval, Dmytro
name: Dudka, Maxym
name: Holovatch, Yurij
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a stability border of a region where nontrivial critical behaviour of an $n$-vector model with long-range power-law decaying interactions is induced by the presence of a structural disorder (e.g. weak quenched dilution). This border is given by the marginal dimension of the order parameter $n_c$ dependent on space dimension, $d$, and a control parameter of the interaction decay, $σ$, below which the model belongs to the new dilution-induced universality class. Exploiting the Harris criterion and recent field-theoretical renormalization group results for the pure model with long-range interactions we get $n_c$ as a three loop $ε=2σ-d$-expansion. We provide numerical values for $n_c$ applying series resummation methods. Our results show that not only the Ising systems ($n=1$) can belong to the new disorder-induced long-range universality class at $d=2$ and $d=3$.
description: 13 pages, 1 figure, submitted to the Festschrift on the occasion of A. S. Davydov's 110th anniversary
KMOS-3D Reveals Low-Level Star Formation Activity in Massive Quiescent Galaxies at 0.7 < z < 2.7
Creators: name: Belli, Sirio
name: Genzel, Reinhard
name: Schreiber, Natascha M. Förster
name: Wisnioski, Emily
name: Wilman, David J.
name: Wuyts, Stijn
name: Mendel, J. Trevor
name: Beifiori, Alessandra
name: Bender, Ralf
name: Brammer, Gabriel B.
name: Burkert, Andreas
name: Chan, Jeffrey
name: Davies, Rebecca L.
name: Davies, Ric
name: Fabricius, Maximilian
name: Fossati, Matteo
name: Galametz, Audrey
name: Lang, Philipp
name: Lutz, Dieter
name: Momcheva, Ivelina G.
name: Nelson, Erica J.
name: Saglia, Roberto P.
name: Tacconi, Linda J.
name: Tadaki, Ken-ichi
name: Übler, Hannah
name: van Dokkum, Pieter
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We explore the H-alpha emission in the massive quiescent galaxies observed by the KMOS-3D survey at 0.7 < z < 2.7. The H-alpha line is robustly detected in 20 out of 120 UVJ-selected quiescent galaxies, and we classify the emission mechanism using the H-alpha line width and the [NII]/H-alpha line ratio. We find that AGN are likely to be responsible for the line emission in more than half of the cases. We also find robust evidence for star formation activity in nine quiescent galaxies, which we explore in detail. The H-alpha kinematics reveal rotating disks in five of the nine galaxies. The dust-corrected H-alpha star formation rates are low (0.2 - 7 Msun/yr), and place these systems significantly below the main sequence. The 24micron-based infrared luminosities, instead, overestimate the star formation rates. These galaxies present a lower gas-phase metallicity compared to star-forming objects with similar stellar mass, and many of them have close companions. We therefore conclude that the low-level star formation activity in these nine quiescent galaxies is likely to be fueled by inflowing gas or minor mergers, and could be a sign of rejuvenation events.
description: 7 pages, 5 figures, published in ApJ Letters
Rényi and Tsallis entropies related to eigenfunctions of quantum graphs
Creators: name: Rastegin, Alexey E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For certain families of finite quantum graphs, we study the question of how eigenfunctions are distributed over the graph. To characterize properties of the distribution, generalized entropies of the Rényi and Tsallis types are considered. The presented approach is similar to entropic uncertainty relations of the Maassen-Uffink type. Using the Riesz theorem, we derive lower bounds on symmetrized generalized entropies of eigenfunctions. A quality of such estimates will depend on boundary conditions used at vertices of the given graph. Rényi and Tsallis entropies of eigenfunctions of star graphs are separately examined. Relations between generalized entropies and variances of eigenfunctions are considered as well. When such relations remain valid on average, they may be used in studies of quantum ergodicity.
description: 13 pages, no figures. Minor improvements in the version 2. The bibliography is extended and updated
Origin of spatial organization of DNA-polymer in bacterial chromosomes
Creators: name: Agarwal, Tejal
name: Manjunath, G. P.
name: Habib, Farhat
name: Chatterji, Apratim
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In-vivo DNA organization at large length scales ($\sim 100nm$) is highly debated and polymer models have proved useful to understand the principle of DNA-organization. Here, we show that $<2$% cross-links at specific points in a ring polymer can lead to a distinct spatial organization of the polymer. The specific pairs of cross-linked monomers were extracted from contact maps of bacterial DNA. We are able to predict the structure of 2 DNAs using Monte Carlo simulations of the bead-spring polymer with cross-links at these special positions. Simulations with cross-links at random positions along the chain show that the organization of the polymer is different in nature from the previous case.
description: arXiv admin note: text overlap with arXiv:1701.05068
Reduced Connectivity for Local Bilinear Jacobi Sets
Creators: name: Klötzl, Daniel
name: Krake, Tim
name: Zhou, Youjia
name: Stober, Jonathan
name: Schulte, Kathrin
name: Hotz, Ingrid
name: Wang, Bei
name: Weiskopf, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Geometry (cs.CG)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: We present a new topological connection method for the local bilinear computation of Jacobi sets that improves the visual representation while preserving the topological structure and geometric configuration. To this end, the topological structure of the local bilinear method is utilized, which is given by the nerve complex of the traditional piecewise linear method. Since the nerve complex consists of higher-dimensional simplices, the local bilinear method (visually represented by the 1-skeleton of the nerve complex) leads to clutter via crossings of line segments. Therefore, we propose a homotopy-equivalent representation that uses different collapses and edge contractions to remove such artifacts. Our new connectivity method is easy to implement, comes with only little overhead, and results in a less cluttered representation.
description: IEEE Workshop on Topological Data Analysis and Visualization in conjunction with IEEE VIS 2022. ACM 2012 CCS - Human-centered computing, Visualization, Visualization techniques; Mathematics of computing, Discrete mathematics
Einstein Equation from Covariant Loop Quantum Gravity in Semiclassical Continuum Limit
Creators: name: Han, Muxin
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we explain how 4-dimensional general relativity and in particular, the Einstein equation, emerge from the spinfoam amplitude in loop quantum gravity. We propose a new limit which couples both the semiclassical limit and continuum limit of spinfoam amplitudes. The continuum Einstein equation emerges in this limit. Solutions of Einstein equation can be approached by dominant configurations in spinfoam amplitudes. A running scale is naturally associated to the sequence of refined triangulations. The continuum limit corresponds to the infrared limit of the running scale. An important ingredient in the derivation is a regularization for the sum over spins, which is necessary for the semiclassical continuum limit. We also explain in this paper the role played by the so-called flatness in spinfoam formulation, and how to take advantage of it.
description: 12+3 pages, no figure, presentation improved
Impact ionization in low-band-gap semiconductors driven by ultrafast THz excitation: beyond the ballistic regime
Creators: name: Biasco, Simone
name: Burri, Florence
name: Houver, Sarah
name: Abreu, Elsa
name: Savoini, Matteo
name: Johnson, Steven L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Using two-dimensional THz spectroscopy in combination with numerical models, we investigate the dynamics linked to carrier multiplication caused by high-field THz excitation of the low-gap semiconductor InSb. In addition to previously observed dynamics connected with quasi-ballistic carrier dynamics, we observe other spectral and temporal features that we attribute to impact ionization for peak fields above 60 kV/cm, which continue up to the maximum investigated peak field of 430 kV/cm. At the highest fields we estimate a carrier multiplication factor greater than 10 due to impact ionization, which is well-reproduced by a numerical simulation of the impact ionization process which we have developed.
description: 25 pages, 5 figures
Holographic Lorentz and Carroll Frames
Creators: name: Campoleoni, Andrea
name: Ciambelli, Luca
name: Delfante, Arnaud
name: Marteau, Charles
name: Petropoulos, P. Marios
name: Ruzziconi, Romain
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Relaxing the Bondi gauge, the solution space of three-dimensional gravity in the metric formulation has been shown to contain an additional free function that promotes the boundary metric to a Lorentz or Carroll frame, in asymptotically AdS or flat spacetimes. We pursue this analysis and show that the solution space also admits a finite symplectic structure, obtained taking advantage of the built-in ambiguities. The smoothness of the flat limit of the AdS symplectic structure selects a prescription in which the holographic anomaly appears in the boundary Lorentz symmetry, that rotates the frame. This anomaly turns out to be cohomologically equivalent to the standard holographic Weyl anomaly and survives in the flat limit, thus predicting the existence of quantum anomalies in conformal Carrollian field theories. We also revisit these results in the Chern--Simons formulation, where the prescription for the symplectic structure admitting a smooth flat limit follows from the variational principle, and we compute the charge algebra in the boundary conformal gauge.
description: 34+9 pages
Aplicación de los principios de la teoría de la actividad a la educación veterinaria
Creators: name: Valverde Luján, Daniel Alejandro
Publisher: name: FILHA
Year: 2023

description: Este trabajo está dedicado a justificar la aplicación de los principios estructurales de la teoría de la actividad, a la formación de veterinarios y zootecnistas competentes. En primer lugar, se justifica la aplicación de la teoría de la actividad como herramienta para estudiar o emprender cualquier tipo de actividad humana. En segundo lugar, se postula a las necesidades como incitadoras de cualquier actividad humana. Y, en tercer lugar, se demuestra y ejemplifica la aplicación de los principios de unidad de conciencia y actividad, orientación a objetos, mediación y estructura jerárquica de la actividad, a la educación veterinaria. This work is dedicated to justify the application of the structural principles of the activity theory, to the training of competent veterinarians and zootechnicians. First, the application of activity theory as a tool to study or undertake any type of human activity is justified. Second, needs are posited as instigators of any human activity. And, third, the application of the principles of unity of consciousness and activity, object orientation, mediation and hierarchical structure of activity, to veterinary education, is demonstrated and exemplified.
description: FILHA, Vol. 17 Núm. 26 (2022): Vol. 17. Núm. 26. Enero-julio 2022
Aproximaciones de la relación entre estados emocionales y felicidad
Creators: name: Jiménez Moreno, José Alfonso
Publisher: name: FILHA
Year: 2023

description: El artículo aborda la pregunta por la felicidad y su relación con las emociones. La reflexión parte de diferentes teorías filosóficas sobre la constitución de las emociones, para, a partir de la perspectiva aristotélica de la eudaimonia, y de la visión de John Stuart Mill, discutir el papel de las emociones en la constitución de la felicidad. La conclusión resalta cómo la felicidad mantiene una relación adjetiva con las emociones agradables y desagradables; la discusión se orienta respecto a cómo lo moral e intelectual favorecen la consolidación de la felicidad en la vida práctica, más allá de los estados emocionales. The article addresses the question of happiness, particularly its relation to emotional states. The reflection starts from the review of various philosophical theories about the constitution of emotions, and later, from the Aristotelian perspective of eudaimonia, and the utilitarian vision of John Stuart Mill, discuss the role of emotional states in the constitution of happiness. The conclusion highlights the way in which happiness maintains an adjective relationship with pleasant and unpleasant emotional states; the discussion focuses on how the moral and intellectual factor favors the consolidation of happiness in practical life, beyond any emotional states.
description: FILHA, Vol. 17 Núm. 26 (2022): Vol. 17. Núm. 26. Enero-julio 2022
Reseña del libro: Semiótica del no. Lecturas de un presente ambiguo
Creators: name: Becerra Villegas, Jesus
Publisher: name: FILHA
Year: 2023

description: En un mundo construido en clave afirmativa, cuya existencia es atendida por filosofías y ciencias en positivo, el espacio del No ha quedado mayormente excluido. A estas disciplinas les ha bastado por regla la compleja realidad para ocupar siglos de tradición. Es otro el esfuerzo que se requiere para postular el vacío del cero y el dominio de lo negativo. La filosofía del No fue postulada por Gastón Bachelard apenas el siglo pasado. De unas décadas antes data la conformación que hoy conocemos de la semiótica como disciplina que estudia los signos y que, al hacerlo, comprende que la vida de estos transcurre en un plano distinto del despliegue de la materia. En su Tratado de semiótica general (1975. México: Nueva imagen y Lumen), Umberto Eco desarrolló algunas consecuencias del pensamiento de Charles Sanders Peirce y definió la semiótica como teoría de la mentira, en tanto disciplina que estudia aquello que puede ser usado para mentir, incluso para construir mentiras correctas. Mientras tanto, los criterios de verificación quedaron como propios de otras ciencias y disciplinas, si bien no exclusivos de ellas.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
El ajedrez en el desarrollo cognitivo
Creators: name: Guerrero Sandoval, Ángel Lev
name: Guerrero Sandoval, Óscar Eduardo
Publisher: name: FILHA
Year: 2023

description: La presente investigación tiene su fundamentación en la relación entre el nivel ajedrecista (Elo) y el desarrollo cognitivo, su objetivo es medirlo; fue elaborada a partir de un enfoque cuantitativo con un propósito de aplicación, correlacional en cuanto a su profundidad y cuasi experimental por su selección de la muestra, se encuentra una relación significativa 0.612 en apenas 40 horas de intervención, se clasifica dentro de la enseñanza programada.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Sobre la exploración de la práctica docente intra áulica. Un acercamiento fenomenológico a la esencia de su existencia
Creators: name: Alanís Huerta, Antonio
Publisher: name: FILHA
Year: 2023

description: Es un ensayo reflexivo sobre la práctica docente que destaca cinco componentes a tener en cuenta. Primero la fenomenología de la práctica docente, su exploración, sus distintas formas de ser y existir, su tiempo y espacio y, por último, la expresión de la práctica docente. El autor se apoya en Heidegger para analizar el fenómeno de la práctica docente como un conflicto epistemológico de la esencia y de la existencia.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Magnetocaloric effect in multilayers studied by membrane-based calorimetry
Creators: name: Kulyk, M.
name: Persson, M.
name: Polishchuk, D.
name: Korenivski, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study magnetic multilayers, incorporating dilute ferromagnetic spacers between strongly-ferromagnetic layers exhibiting a proximity-enhanced magnetocaloric effect. Using magnetometry and direct measurements of the adiabatic temperature change based on a nanomembrane-calorimetry, we find that the magnetocaloric effect in the studied multilayer is indeed enhanced compared to that in the bulk spacer material. We develop a phenomenological numerical model of the studied trilayer and find that a long-range exchange interaction through the weakly-ferromagnetic spacer is required to adequately describe the magnetic and magnetocaloric properties of the system.
Surface roughness noise analysis and comprehensive noise effects on depth-dependent coherence time of NV centers in diamond
Creators: name: Chrostoski, Philip
name: Kehayias, Pauli
name: Santamore, D. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Noise is a detrimental issue for nitrogen-vacancy (NV) centers in diamond, causing line broadening and decreasing the coherence time (T2). Following our previous electric and magnetic field noise work, we investigate noise caused by the diamond surface roughness, which is a source for charge density fluctuations and incoherent photon scattering. We find that the varying surface charge density noise source is prevalent throughout the entire NV dynamical decoupling frequency range, while the photon scattering noise is almost negligible. Next, we combine the results from various noise sources to perform comprehensive analyses on T2 and how it varies with NV depth. At a given NV depth of 5 nm below a hydrogen- or fluorine-terminated surface, we find that these magnetic nuclei reduce the NV coherence time the most, followed by the surface electric field noise sources. The photon scattering and bulk magnetic field noise effects on T2 are weak compared to the varying charge density, electric dipole, and surface impurity noise. However, with oxygen surface termination, the surface electric field noise becomes comparable to the surface magnetic field noise. Our calculated values of T2,Hahn (few microseconds to ten microseconds) are in good agreement with the experimental values reported elsewhere. Finally, we calculate an anticipated signal-to-noise ratio (SNR) for NV AC magnetometry of external nuclear spins. In our simplified assessment, where some depth-dependent parameters (e.g. NV conversion efficiency) are held constant, we find that shallower NV layers should yield the best SNR, which is consistent with experimental findings.
description: 16 pages, 7 figures
Effect of dipolar interactions and DC magnetic field on the specific absorption rate of an array of magnetic nanoparticles
Creators: name: Déjardin, J. -L.
name: Vernay, F.
name: Respaud, M.
name: Kachkachi, H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We address the issue of inter-particle dipolar interactions in the context of magnetic hyperthermia. More precisely, the main question dealt with here is concerned with the conditions under which the specific absorption rate is enhanced or reduced by dipolar interactions. For this purpose, we propose a theory for the calculation of the AC susceptibility, and thereby the specific absorption rate, for a monodisperse two-dimensional assembly of nanoparticles with oriented anisotropy, in the presence of a DC magnetic field, in addition to the AC magnetic field. We also study the competition between the dipolar interactions and the DC field, both in the transverse and longitudinal configurations. In both cases, we find that the specific absorption rate has a maximum at some critical DC field that depends on the inter-particle separation. In the longitudinal setup, this critical field falls well within the range of experiments.
description: 9 pages
Insights into the nature of the $X(3872)$ through B meson decays
Creators: name: Zhang, Zhi-Qing
name: Guan, Zhi-Lin
name: Zhao, Yan-Chao
name: Zhang, Zi-Yu
name: Sun, Zhi-Jie
name: Wang, Na
name: Ren, Xiao-Dong
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the decays $B_{c,u,d}\to X(3872)P$ in the perturbative QCD (PQCD) approach, where the puzzling resonance $X(3872)$ is involved and $P$ represents a light pseudoscalar meson $K$ and $π$. Assuming the $X(3872)$ as a $1^{++}$ charmonium state, we find the following results: (a) The branching ratios for the decays $B^+_c\to X(3872)π^+$ and $B^+_c\to X(3872) K^+$ agree with the results predicted by the covariant light-front approach within errors, but are larger than those given by the generalized factorization approach; (b) The branching ratio for the decay $B^+\to X(3872)K^+$ is predicted as $(3.8^{+1.1}_{-1.0})\times10^{-4}$, which is smaller than the previous PQCD calculation result, but still slightly larger than the upper limits set by Belle and BaBar. So we suggest that the decays $B^{0,+}\to X(3872)K^{0,+}$ should be precisely measured by the running LHCb and Belle II experiments, which is very helpful to probe the inner structure of the $X(3872)$; (c) Compared with the decays $B_{u,d}\to X(3872)K$, the decays $B_{u,d}\to X(3872)π$ have much smaller branching ratios, which drop to as low as $10^{-6}$; (d) The direct CP violations for these considered decays are very small, only $10^{-3}\sim 10^{-2}$, because the penguin contributions are loop suppressed compared with the tree contributions. Testing the results for the branching ratios and the CP violations including the implicit $SU(3)$ and isospin symmetries in these decays by experiments is helpful to probe the nature of the $X(3872)$.
description: 11 pages, 2 figures
Arquitectura interior de la catedral de Zacatecas, dedicada a la Virgen de la Asunción. Algunas claves de la Pasión de Cristo
Creators: name: Valverde Ramírez, Maricela De La Luz
name: Jiménez Moreno, Julio César
name: García Ortiz, Rosa María
Publisher: name: FILHA
Year: 2023

description: El trabajo desarrolla una lectura iconográfica e iconológica de algunas piezas clave de la catedral de Zacatecas, enlazando la fe, la iconografía y la historia del arte, ya que cada imagen que se describe es una obra de arte que representa un episodio de la historia del cristianismo. Estas obras esculpidas en cantera rosada zacatecana complementan la lectura iconográfica de este gran libro de piedra que es la catedral. Las dovelas se caracterizan por lograr que las figuras talladas se adapten a un espacio pequeño sin que se pierdan las cualidades distintivas, como son la iconografía y la simbología de los personajes. El presente análisis permite ampliar y valorar más al artista y artesano que debió diseñar estas piezas con sumo cuidado y erudición en el tema. Las dovelas patrimonio arquitectónico- del interior del edificio más representativo de Zacatecas, la catedral también un ícono en México, un bien cultural heredado, símbolo de nuestra identidad-, muestran la religiosidad de la época colonial, misma que subsiste al presente. A través de la Historia del Arte se realizó una observación ardua, un análisis deductivo e inductivo y una reflexión de la experiencia propia en nuestro trabajo de campo, de observación directa, toma de varias fotografías, detalles y varias visitas a la catedral zacatecana y otras catedrales cercanas. El interés principal es que se conozcan estas obras escultóricas de arte sacro, que no se han publicado tan detalladamente como lo presenta este estudio para comprender y valorar el arte mestizo del interior de la catedral. La principal aportación de este trabajo es la descripción de los elementos prehispánicos en algunas de sus dovelas, mismas que son un importante patrimonio arquitectónico de formato pequeño. Después de realizar una amplia reflexión de la descripción de las piezas claves, se puso énfasis en una parte de la historia de la catedral, donde resaltan los diferentes esculpidos en la creatividad de las dos manos de los escultores: el europeo y el mestizo; estas piezas claves tienen un lenguaje plástico propio donde se conjugan los pasajes bíblicos aunados a las tradiciones y leyendas. Los autores de este artículo apuntan a que el arte sacro zacatecano se identifique y apropie de su historia local, de esta parte de su patrimonio arquitectónico heredado que, si bien no es monumental, es original como documento histórico, tan rico en varios sentidos, deja entrever el ambiente descrito por primera ocasión con más detalles y nuevos hallazgos que estamos resaltando en diferentes artículos. Abordamos pocas claves, ya que en total son ochenta y siete las dovelas, ninguna repetida a excepción de tres de las ventanas. Por todo lo anterior mencionado, esta investigación es relevante para la Historia del Arte.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Excitations and stability of weakly interacting Bose gases with multi-body interactions
Creators: name: Laghi, D.
name: Macrì, T.
name: Trombettoni, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider weakly interacting bosonic gases with local and non-local multi-body interactions. By using the Bogoliubov approximation, we first investigate contact interactions, studying the case in which the interparticle potential can be written as a sum of N-body δ-interactions, and then considering general contact potentials. Results for the quasi-particle spectrum and the stability are presented. We then examine non-local interactions, focusing on two different cases of 3-body non-local interactions. Our results are used for systems with 2- and 3-body δ-interactions and applied for realistic values of the trap parameters. Finally, the effect of conservative 3-body terms in dipolar systems and soft-core potentials (that can be simulated with Rydberg dressed atoms) is also studied.
description: Submitted version
Comentarios al libro "Influencias culturales francesas y alemanas en la obra de Cioran
Creators: name: Pamplona Rangel, Francisco
Publisher: name: FILHA
Year: 2023

description: La obra del rumano-francés Emil Cioran o como lo conocimos en español hace más de 40 años E. M. Cioran, es una de las más elusivas y más lúcidas en la historia del pensamiento del siglo XX. Atravesada por la polémica, su obra ha sufrido los embates de detractores y críticos, muchos no justificados y otros tantos con algún grado de razón. También ha recibido el acoso de elogios de seguidores y epígonos que, sin miramientos, quisieran destacar la obra del transilvano como intocable. “Es que no se comprende la profundidad de su pensamiento”, o “son ataques pérfidos, derivados de prejuicios ideológicos”, etc.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022