cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamics of quantum soliton in Lee-Huang-Yang spin-orbit coupled Bose-Einstein condensates
Creators: name: Gangwar, Sonali
name: Ravisankar, Rajamanickam
name: Muruganandam, Paulsamy
name: Mishra, Pankaj Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present the numerical results of the structure and dynamics of the self-bound ground state arising solely because of the presence of beyond mean field quantum fluctuation in spin-orbit coupled binary Bose-Einstein condensates in one dimension. Depending upon spin-obit (SO) and Rabi couplings, we observe that the ground state exhibits either quantum-bright (plane) or quantum-stripe soliton nature. We find an analytical soliton solution for non-zero SO coupling that matches quite well with the numerical results. Further, we investigate the dynamical stability of these solitons by adopting three protocols, such as (i) adding initial velocity to each component, (ii) quenching the SO and Rabi coupling parameters at initial and finite time, and (iii) allowing collision between the two spin-components by giving equal and opposite direction velocity to them. Many interesting dynamical features of the solitons, like, multi-fragmented, repelling, and breathing in time and space-time, are observed. For given Rabi coupling frequency, the breathing frequency of the soliton increases upon the increase in SO coupling, attaining a maximum at the critical SO coupling where the phase transition from the bright to stripe soliton occurs. We observe that the maximum breathing frequency exhibits power law dependence on the Rabi coupling frequency with an exponent $\sim 0.16$.
description: 17 pages, 18 figures, typos corrected, clarity of some figures got enhanced
El feminismo en México: De la Revolución Mexicana hasta el feminismo 4.0
Creators: name: Rivas Hernández, Angelica
Publisher: name: FILHA
Year: 2023

description: Analizar el desarrollo histórico de la lucha feminista en México en el siglo XX y XXI, con base en los estudios de las autoras Patricia Galeana, Martha Eva Rocha Islas, Ana Lau Jaiven, Dora Barrancos, Enriqueta Tuñón, Estela Serret, Marta Lamas y Sara Sefchovich, tomando como temas centrales el sufragio femenino, la despenalización del aborto y la violencia de género, para argumentar la importancia del feminismo en México.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Relativistic coupled-cluster analysis of parity nonconserving amplitudes and related properties of the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{3/2;5/2}$ transitions in $^{133}$Cs
Creators: name: Sahoo, B. K.
name: Das, B. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present the results of our calculations of the parity nonconserving electric dipole amplitudes ($E1_{PNC}$) for the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{3/2;5/2}$ transitions of $^{133}$Cs employing a relativistic coupled-cluster (RCC) method. $E1_{PNC}$ values for the nuclear spin independent (NSI) and nuclear spin dependent (NSD) parity non-conservation (PNC) effects for different hyperfine levels of the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{3/2}$ transition and only due to the NSD PNC interaction Hamiltonian for all possible hyperfine levels of the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{5/2}$ transition are given. We have also performed calculations of several properties that are relevant for assessing the reliability of the calculations of the amplitudes of the above mentioned transitions. We highlight the importance of correlation effects by giving the results of both the Dirac-Fock (DF) and RCC contributions. Approximate contributions to these properties from the Breit and quantum electrodynamics (QED) interactions have also been evaluated. Plausible experimental schemes to measure these transition amplitudes by light shift techniques and interference involving induced Stark shifts are outlined.
description: 10 pages, 6 tables, Mol. Phys. 115, 2765-2774 (2017)
MPEC 2023-N11 : 2019 LY5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Factors Affecting Acreage Diverted Under the U.S. Feed-Grain Program
Creators: name: Miller, Thomas A.
name: Hargrove, Stanley H.
name: Miller, Thomas A.
name: Hargrove, Stanley H.
Publisher: name: Unknown
Year: 1970
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Land Economics/Use
subject: Livestock Production/Industries
subject: Research Methods/ Statistical Methods
subject: Government feed-grain program response
subject: national
subject: regression analysis
subject: cross-sectional and time series
subject: secondary data

description: Several factors have significantly influenced the number of acres diverted from production under Government feed-grain programs since 1961. Least-squares regression analyses of historical data suggest that the most important factors affecting the amount of diversion are (1) maximum portion of the feed-grain base farmers are allowed to divert, (2) payment rates for voluntary diversion, and (3) relationship between total support rate and market price. After these three factors have been accounted for, an upward trend in diverted acreage over time is apparent, possibly due to changing attitudes of farmers toward the voluntary program. Statistical models developed also have value as predictive tools, given a continuance of similar types of feed-grain programs.
Pion spectroscopy and dynamics using the holographic light-front Schrödinger equation and the 't Hooft equation
Creators: name: Ahmady, Mohammad
name: Kaur, Satvir
name: Mondal, Chandan
name: Sandapen, Ruben
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the holographic Schrödinger equation of light-front chiral QCD, together with the 't Hooft equation of (1+1)-dimensional QCD in the large $N_c$ limit, can simultaneously describe pion spectroscopy as well as the pion decay constant, charge radius, electromagnetic form factor, photon-to-pion transition form factor, Parton Distribution Function (PDF) and Distribution Amplitude (DA). Furthermore, the chiral-limit constraints, as encoded in the Gell-Mann-Oakes-Renner (GMOR) relation, are satisfied.
description: 8 pages, 8 figures
Many-body effects in the excitation spectrum of weakly-interacting Bose-Einstein condensates in one-dimensional optical lattices
Creators: name: Beinke, Raphael
name: Klaiman, Shachar
name: Cederbaum, Lorenz S.
name: Streltsov, Alexej I.
name: Alon, Ofir E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: In this work, we study many-body excitations of Bose-Einstein condensates (BECs) trapped in periodic one-dimensional optical lattices. In particular, we investigate the impact of quantum depletion onto the structure of the low-energy spectrum and contrast the findings to the mean-field predictions of the Bogoliubov-de Gennes (BdG) equations. Accurate results for the many-body excited states are obtained by applying a linear-response theory atop the MCTDHB (multiconfigurational time-dependent Hartree method for bosons) equations of motion, termed LR-MCTDHB. We demonstrate for condensates in a triple well that even weak ground-state depletion of around $1\%$ leads to visible many-body effects in the low-energy spectrum which deviate substantially from the corresponding BdG spectrum. We further show that these effects also appear in larger systems with more lattice sites and particles, indicating the general necessity of a full many-body treatment.
Economía ecológica: Los huertos ribereños una tradición sustentable
Creators: name: Macias Madero, Adriana
Publisher: name: FILHA
Year: 2023

description: La sustentabilidad se basa en la consideración de estrategias que promuevan el bienestar y la calidad de vida de las personas, las cuales van en relación del cuidado del medio ambiente puesto que éste afecta al bienestar y a la vida humana. Desde su instauración en la época colonial, las huertas michoacanas fueron consideradas por Vasco de Quiroga como unidades sustentables desde las cuales se impulsaba el comercio y la labranza, además de promover la felicidad de la gente. El presente documento surge del Proyecto de reactivación de huertas en las riberas del Lerma que se basa en una propuesta para impulsar la soberanía alimentaria a partir de prácticas o saberes tradicionales que la población que habita la región aún posee, pero que están en riesgo de perderse. Conforme al análisis del paisaje y a la historia cultural de La Piedad, puede destacarse que, varias comunidades o rancherías practicaron la horticultura de río por lo que éstas pueden beneficiarse de las iniciativas de promoción y rescate del patrimonio, específicamente ésta que busca, a partir de los saberes tradicionales recuperados por entrevistas con antiguos hortelanos, reactivar las huertas como una estrategia de sustentabilidad.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Research on the electromagnetic and weak dipole moments of the tau-lepton at the Bestest Little Higgs Model
Creators: name: Cruz-Albaro, E.
name: Gutiérrez-Rodríguez, A.
name: Aranda, J. I.
name: Ramírez-Zavaleta, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, using the Bestest Little Higgs Model (BLHM) we calculate at the one-loop level the contributions to the Anomalous Magnetic Dipole Moment (AMDM) and Anomalous Weak Magnetic Dipole Moment (AWMDM) of the tau-lepton. The implications from this model are study, emphasizing the contributions of the new physics induced by the new scalar and vector bosons of the BLHM: $S_i=H_0, A_0, ϕ^{0}, η^{0}, σ, H^{\pm}, ϕ^{\pm}, η^{\pm}$, and $V_i=Z', W'$, because these quantify the new physics. With these new contributions we estimated bounds on both the real and imaginary parts of the AMDM and AWMDM of the tau-lepton. Our study complements other one-loop level research performed on models beyond the Standard Model.
description: 35 pages and 29 figures
Instrucción femenina, complementariedad e igualdad de los sexos. El ideal de la mujer moderna en España, 1868-1907.
Creators: name: Magallanes Delgado, María Del Refugio
name: Rodríguez González, Josefina
name: Gutiérrez Hernández, Norma
Publisher: name: FILHA
Year: 2023

description: Los estudios sobre la educación formal para las mujeres es un campo de investigación que ha revelado una situación de lucha permanente de este sector de la población por ser reconocido en el contexto sociopolítico y económico en el devenir histórico. Esta lucha ha representado procesos de modernización del rol de las mujeres como grupo heterogéneo y poseedor de intereses de variada índole. Las discusiones historiográficas sobre el análisis de la presencia y el papel de las mujeres en la historia y la cultura en países como Estados Unidos, Reino Unido, Francia y España se inscriben en un movimiento más amplio y complejo: la lucha por el feminismo. Hecho histórico que coloca en el centro de la disputa, el análisis y uso del concepto dicotómico de lo público/lo privado y, con ello, la utilidad pública/utilidad doméstica en la historiografía de la educación de las mujeres durante el siglo XIX e inicios del XX. Para el caso concreto de España, las y los defensores y retractores de las singularidades intelectuales, físicas y morales de las mujeres en la segunda mitad del siglo XIX y principios del siglo XX, sostuvieron con base en argumentos de los ideales políticos del liberalismo republicano y el krausismo, la complementariedad de los sexos, es decir, hombres y mujeres eran necesarios en la vida pública del país, pero se aplicaban ciertas restricciones a las féminas. En ese sentido, era necesario modernizar los proyectos de instrucción pública para las mujeres, particularmente para el sector de clase media; fracción ignorada en la política de asistencia social emprendida por el Estado para socorrer a las pobres. Una de las premisas centrales del gobierno era que si este sector de pobres accedía a estudios profesionales y técnicos se incentivaba el desarrollo económico del país.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Lessons Learnt from the ITACA Project and Way Forward
Creators: name: Baena, Miguel
name: García Cantú, Oliva
name: Mocholí, David
name: Herranz, Ricardo
name: Delhaye, Eef
name: van der Loo, Saskia
name: Zheng, Danlin
name: Fabio, Adrián
name: Gil, Pablo
name: García, Alba
name: Roungas, Bill
Publisher: name: Zenodo
Year: 2022
Subjects: air traffic management
technology adoption
economic modelling
agent-based modelling
participatory experiments
behavioural economics
policy assessment

description: The ITACA project aimed to shed light on the drivers and barriers for the adoption of new technologies in ATM, with the ultimate goal of supporting the identification, formulation and implementation of policies and regulations that accelerate ATM modernisation. To this end, the project has brought together the wide body of theory on technology adoption developed in the field of industrial organisation with the state-ofthe-art in computational behavioural economics and participatory simulation, in an attempt to provide a rich, multifaceted analysis able to capture the complexity of the ATM R&I lifecycle. The paper presents an overview of the insights gained through different analysis and modelling techniques (economic modelling, agent-based simulation, participatory experiments with industry experts) on the mechanisms that drive technology adoption in ATM, as well as a set of key takeaways, policy recommendations and a look to the future.
Charge asymmetry in elastic scattering of massive leptons on protons
Creators: name: Koshchii, O.
name: Afanasev, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The charge asymmetry due to higher-order QED corrections in elastic lepton-proton scattering is estimated without employing the ultrarelativistic approximation. Our calculation is performed by generalizing the soft-photon approximation approach suggested by Tsai. Corresponding loop integrals that take a form of Passarino-Veltman scalar three-point functions are calculated analytically without neglecting the mass of the lepton. Our results provide model-independent charge asymmetry predictions for scattering of unpolarized and massive leptons on proton targets. These predictions can be used in corresponding experiments to determine the contribution coming from model-dependent hard two-photon exchange processes.
description: 10 pages, 4 figures; minor changes, published version
Quantum metrology of noisy spreading channels
Creators: name: Górecki, Wojciech
name: Riccardi, Alberto
name: Maccone, Lorenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide the optimal measurement strategy for a class of noisy channels that reduce to the identity channel for a specific value of a parameter (spreading channels). We provide an example that is physically relevant: the estimation of the absolute value of the displacement in the presence of phase randomizing noise. Surprisingly, this noise does not affect the effectiveness of the optimal measurement. We show that, for small displacement, a squeezed vacuum probe field is optimal among strategies with same average energy. A squeezer followed by photodetection is the optimal detection strategy that attains the quantum Fisher information, whereas the customarily used homodyne detection becomes useless in the limit of small displacements, due to the same effect that gives Rayleigh's curse in optical superresolution. There is a quantum advantage: a squeezed or a Fock state with $N$ average photons allow to asymptotically estimate the parameter with a $\sqrt{N}$ better precision than classical states with same energy.
description: 4+4 pages, 4 figures
Level of Knowledge about "Spit Don't Rinse" Brushing Technique and Influencing Factors among Dental Patients in Vajira Hospital
Creators: name: Jitima Uearattanavong
name: Donhathai Sittipongporn
Publisher: name: Text and Journal Publication
Year: 2022
Subjects: spit don't rinse
knowledge
dental patient

description: Vajira Medical Journal, 66, 5, 311-318
Localization and mass spectra of various matter fields on Weyl thin brane
Creators: name: Sui, Tao-Tao
name: Zhao, Li
name: Zhang, Yu-Peng
name: Xie, Qun-Ying
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It has been shown that the thin brane model in a five-dimensional Weyl gravity can deal with the wrong-signed Friedmann-like equation in the Randall--Sundrum-1 (RS1) model. In the Weyl brane model, there are also two branes with opposite brane tensions, but the four-dimensional graviton (the gravity zero mode) is localized near the negative tension brane, while our four-dimensional universe is localized on the positive tension brane. In this paper, we consider the mass spectra of various bulk matter fields (i.e., scalar, vector, and fermion fields) on the Weyl brane. It is shown that the zero modes of those matter fields can be localized on the positive tension brane under some conditions. The mass spectra of the bulk matter fields are equidistant for the higher excited states, and relatively sparse for the lower excited states. The size of the extra dimension determines the gap of the mass spectra. We also consider the correction to the Newtonian potential in this model and it is proportional to $1/r^{3}$.
description: 15 pages, 11 figures, 1 table
Educación emocional y procesos de aprendizaje respecto al rendimiento académico en nivel primaria
Creators: name: Delgadillo Sustaita, Araceli
name: Villagrán Rueda, Sonia
Publisher: name: FILHA
Year: 2023

description: El objetivo del presente artículo es demostrar cómo influyen las emociones en los procesos de aprendizaje respecto al rendimiento académico del alumnado de un grupo de tercero de primaria en Guadalupe, Zacatecas. La metodología es de tipo cualitativa, bajo el diseño fenomenológico, utiliza la aplicación de un instrumento de elaboración propia en referencia al manejo de emociones y procesos de aprendizaje a un grupo de 18 estudiantes, identifica emociones positivas y negativas. Los resultados obtenidos muestran que el grupo de tercero de primaria alberga altos porcentajes de emociones negativas vinculadas a los procesos de aprendizaje, denotando que el miedo y la vergüenza son experiencias que se dan en situaciones de manera directa e indirecta, es decir la niña y el niño reconocen la emoción, sin embargo, no la identifican ante una situación que puede ser angustiante y/o estresante, como lo es una evaluación y esto se refleja en su rendimient o académico, por lo que se concluye que es evidente que las emociones ya sean positivas o negativas tienen un gran significado dentro de las aulas, por lo que es necesario desarrollar estrategias y/o técnicas que faciliten habilidades para que la niña y el niño pueda afrontar situaciones de estrés y angustia, ante evaluaciones académicas.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458
Creators: name: Sousa, M. F.
name: Coelho, J. G.
name: de Araujo, J. C. N.
name: Kepler, S. O.
name: Rueda, J. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Double white dwarf (DWD) mergers are possibly the leading formation channel of massive, rapidly rotating, high-field magnetic white dwarfs (HFMWDs). However, the direct link connecting a DWD merger to any observed HFMWD is still missing. We here show that the HFMWDs SDSS J221141.80+113604.4 (hereafter J2211+1136) and ZTF J190132.9+145808.7 (hereafter J1901+1458), might be DWD merger products. J2211+1136 is a $1.27\, M_\odot$ WD with a rotation period of $70.32$ s and a surface magnetic field of $15$ MG. J1901+1458 is a $1.327$--$1.365\, M_\odot$ WD with a rotation period of $416.20$ s, and a surface magnetic field in the range $600$--$900$ MG. With the assumption of single-star evolution, the currently measured WD masses and surface temperatures, the cooling ages of J2211+1136 and J1901+1458 are, respectively, $2.61$--$2.85$ Gyr and $10$--$100$ Myr. We hypothesize that these WDs are DWD merger products and compute the evolution of the post-merged configuration formed by a central WD surrounded by a disk. We show that the post-merger system evolves through three phases depending on whether accretion, mass ejection (propeller), or magnetic braking dominates the torque onto the central WD. We calculate the time the WD spends in each of these phases and obtain the accretion rate and disk mass for which the WD rotational age, i.e., the total time elapsed since the merger to the instant where the WD central remnant reaches the current measured rotation period, agrees with the estimated WD cooling age. We infer the mass values of the primary and secondary WD components of the DWD merger that lead to a post-merger evolution consistent with the observations.
Full counting statistics approach to the quantum non-equilibrium Landauer bound
Creators: name: Guarnieri, Giacomo
name: Campbell, Steve
name: Goold, John
name: Pigeon, Simon
name: Vacchini, Bassano
name: Paternostro, Mauro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop the full counting statistics of dissipated heat to explore the relation with Landauer's principle. Combining the two-time measurement protocol for the reconstruction of the statistics of heat with the minimal set of assumptions for Landauer's principle to hold, we derive a general one-parameter family of upper and lower bounds on the mean dissipated heat from a system to its environment. Furthermore, we establish a connection with the degree of non-unitality of the system's dynamics and show that, if a large deviation function exists as stationary limit of the above cumulant generating function, then our family of lower and upper bounds can be used to witness and understand first-order dynamical phase transitions. For the purpose of demonstration, we apply these bounds to an externally pumped three level system coupled to a finite sized thermal environment.
description: 9 pages, 6 figures. Close to published version
Quantifying chaos using Lagrangian descriptors
Creators: name: Hillebrand, Malcolm
name: Zimper, Sebastian
name: Ngapasare, Arnold
name: Katsanikas, Matthaios
name: Wiggins, Stephen R.
name: Skokos, Charalampos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We present and validate simple and efficient methods to estimate the chaoticity of orbits in low dimensional dynamical systems from computations of Lagrangian descriptors (LDs) on short time scales. Two quantities are proposed for determining the chaotic or regular nature of orbits in a system's phase space, which are based on the values of the LDs of these orbits and of nearby ones: The difference (DNLD) and ratio (RNLD) of neighboring orbits' LDs. We find that, typically, these indicators are able to correctly characterize the chaotic or regular nature of orbits to better than 90 % agreement with results obtained by implementing the Smaller Alignment Index (SALI) method, which is a well established chaos detection technique. Further investigating the performance of the two introduced quantities we discuss the effects of the total integration time and of the spacing between the used neighboring orbits on the accuracy of the methods, finding that even typical short time, coarse grid LD computations are sufficient to provide a reliable quantification of a system's chaotic component, using less CPU time than the SALI. In addition to quantifying chaos, the introduced indicators have the ability to reveal details about the systems' local and global chaotic phase space structure. Our findings clearly suggest that LDs can also be used to quantify and investigate chaos in continuous and discrete low dimensional dynamical systems.
Estrategias de afrontamiento asumidas por estudiantes de la universidad Simón Bolívar en clases virtuales por la crisis del covid-19
Creators: name: Albor Chadid, Lourdes Isabel
name: Albor Estrada, Mónica Lucía
Publisher: name: FILHA
Year: 2023

description: Ante la crisis y vulnerabilidad que aconteció alrededor de la pandemia por efectos del Covid-19, la educación constituyó uno de los principales sistemas que debió luchar para que no se detuviera. Este estudio tuvo como objetivo determinar las estrategias de afrontamiento en relación al nivel de estrés por las nuevas condiciones de readaptación ante la modalidad virtual para la continuidad de los procesos académicos en estudiantes de octavo semestre del Programa de Psicología de la Universidad Simón Bolívar, Barranquilla, por el desencadenante repentino del virus Covid-19. Método: se basó en un estudio no experimental, con un diseño cuantitativo, con la aplicación de una encuesta transversal aplicada a través de “Google Forms”. Conclusiones: los estudiantes inducidos para encontrar mejor equilibrio y alternativas en su sistema por la nueva modalidad académica virtual, también utilizaron, con el desarrollo de las tecnologías, estrategias de mayor apropiación y “recopilación de información adicional sobre el problema, averiguando más sobre el problema”, lo que les permitió prepararse para el nuevo fenómeno y adquirir una nueva modalidad de enseñanza-aprendiza que antes era invisible.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Low Back Pain Prevalence and Associated Factors among Medical Students
Creators: name: Kritsana Kientchockwiwat
name: Sirikarn Tangcheewinsirikul
Publisher: name: Text and Journal Publication
Year: 2022
Subjects: low back pain
medical students
disability
back pain
musculoskeletal pain
undergraduate student

description: Vajira Medical Journal, 66, 5, 319-328
CORINOS I: JWST/MIRI Spectroscopy and Imaging of a Class 0 protostar IRAS 15398-3359
Creators: name: Yang, Yao-Lun
name: Green, Joel D.
name: Pontoppidan, Klaus M.
name: Bergner, Jennifer B.
name: Cleeves, L. Ilsedore
name: Evans, Neal J.
name: Garrod, Robin T.
name: Jin, Mihwa
name: Kim, Chul Hwan
name: Kim, Jaeyeong
name: Lee, Jeong-Eun
name: Sakai, Nami
name: Shingledecker, Christopher N.
name: Shope, Brielle
name: Tobin, John J.
name: van Dishoeck, Ewine
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The origin of complex organic molecules (COMs) in young Class 0 protostars has been one of the major questions in astrochemistry and star formation. While COMs are thought to form on icy dust grains via gas-grain chemistry, observational constraints on their formation pathways have been limited to gas-phase detection. Sensitive mid-infrared spectroscopy with JWST enables unprecedented investigation of COM formation by measuring their ice absorption features. We present an overview of JWST/MIRI MRS spectroscopy and imaging of a young Class 0 protostar, IRAS 15398-3359, and identify several major solid-state absorption features in the 4.9-28 $μ$m wavelength range. These can be attributed to common ice species, such as H$_2$O, CH$_3$OH, NH$_3$, and CH$_4$, and may have contributions from more complex organic species, such as C$_2$H$_5$OH and CH$_3$CHO. The MRS spectra show many weaker emission lines at 6-8 $μ$m, which are due to warm CO gas and water vapor, possibly from a young embedded disk previously unseen. Finally, we detect emission lines from [Fe II], [Ne II], [S I], and H$_2$, tracing a bipolar jet and outflow cavities. MIRI imaging serendipitously covers the south-western (blue-shifted) outflow lobe of IRAS 15398-3359, showing four shell-like structures similar to the outflows traced by molecular emission at sub-mm wavelengths. This overview analysis highlights the vast potential of JWST/MIRI observations and previews scientific discoveries in the coming years.
description: Accepted to ApJL. The methods of data reduction and spectral extraction are updated
Relación tutora en telesecundarias de Tlaltenango, Zacatecas
Creators: name: De Ávila Aguilar, Álvaro
name: Rochin Berumen, Fabiola Lydie
name: Rodríguez Tenorio, Daniel
Publisher: name: FILHA
Year: 2023

description: El objetivo de esta investigación fue conocer la relación tutora en telesecundarias multigrado de Tlaltenango, Zacatecas, siendo el diálogo el centro de la práctica escolar. Es una investigación cualitativa, de enfoque fenomenológico con observación participante, con análisis de entrevistas realizadas a alumnos y maestros promotores de comunidades de aprendizaje mediante redes semánticas. Los resultados mostraron que los alumnos eligen tutor y tema de estudio, investigan por interés, comparten lo que aprenden; sintieron cambios durante su nivel secundaria en el desarrollo de habilidades. Los docentes vieron una herramienta que generó cambios al interior de las familias, emociones que fortalecieron la tolerancia, se humanizan los aprendizajes y reducen estrés. Ambos desean que en un futuro se amplíe el proyecto y se involucren padres de familia en la tutoría entre pares, destaca el deseo de que docentes y alumnos cambien de práctica dentro de sus escuelas mediante redes de tutoría.
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
Electronic Supplementary Material from Genetic variation underlies plastic responses to global change drivers in the purple sea urchin, Strongylocentrotus purpuratus
Creators: name: Strader, Marie E.
name: Wolak, Matthew E.
name: Simon, Olivia M.
name: Hofmann, Gretchen E.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Developmental Biology

description: Phenotypic plasticity and adaptive evolution enable population persistence in response to global change. However, there are few experiments that test how these processes interact within and across generations, especially in marine species with broad distributions experiencing spatially and temporally variable temperature and pCO2. We employed a quantitative genetics experiment with the purple sea urchin, Strongylocentrotus purpuratus, to decompose family-level variation in transgenerational and developmental plastic responses to ecologically relevant temperature and pCO2. Adults were conditioned to controlled non-upwelling (high temperature, low pCO2) or upwelling (low temperature, high pCO2) conditions. Embryos were reared in either the same conditions as their parents or the crossed environment, and morphological aspects of larval body size were quantified. We find evidence of family-level phenotypic plasticity in response to different developmental environments. Among developmental environments, there was substantial additive genetic variance for one body size metric when larvae developed under upwelling conditions, although this differed based on parental environment. Furthermore, cross-environment correlations indicate significant variance for genotype-by-environment interactive effects. Therefore, genetic variation for plasticity is evident in early stages of S. purpuratus, emphasizing the importance of adaptive evolution and phenotypic plasticity in organismal responses to global change.
La modernidad y las vanguardias como aventura y descubrimiento de lo nuevo
Creators: name: Orejudo Pedrosa, Juan Carlos
Publisher: name: FILHA
Year: 2023

description: El descubrimiento de una conciencia de la modernidad, es decir, del carácter efímero y transitorio de la belleza moderna, tal como lo había anunciado Baudelaire, es proseguido por las Vanguardias del siglo XX, como una aventura en la búsqueda incesante por lo nuevo. Analizaremos la novedad de las vanguardias desde la modernidad estética de la segunda mitad del siglo XIX, que retomará el Surrealismo a partir de André Breton. Nos detendremos en la figura de Salvador Dalí, donde se entrecruzan los temas centrales del arte moderno: la locura, el amor, los sueños. La novedad es el núcleo central de la modernidad estética de Baudelaire y posiblemente también su más importante legado al arte vanguardista del siglo XX.
description: FILHA, Vol. 18 Núm. 28 (2023): Vol. 18, No 28, enero-julio 2023
Nearby galaxies in the LOFAR Two-metre Sky Survey II. The magnetic field-gas relation
Creators: name: Heesen, V.
name: Klocke, T. -L.
name: Brüggen, M.
name: Tabatabaei, F. S.
name: Basu, A.
name: Beck, R.
name: Drabent, A.
name: Nikiel-Wroczyński, B.
name: Paladino, R.
name: Schulz, S.
name: Stein, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. Magnetic fields are key to understand galaxy evolution, regulating stellar feedback and star formation in galaxies. Aims. We probe the origin of magnetic fields in late-type galaxies, measuring magnetic field strengths, exploring whether magnetic fields are only passive constituents of the interstellar medium, or whether they are active constituents being part of the local energy equilibrium. Methods. We measure equipartition magnetic field strengths in 39 galaxies from LoTSS-DR2 using LOFAR observations at 144 MHz with 6 arcsec angular resolution which (0.1-0.7 kpc). For a subset of 9 galaxies, we obtain atomic and molecular mass surface densities using HI and CO(2-1) data, from the THINGS and HERACLES surveys, respectively. These data are at 13 arcsec angular resolution, which corresponds to 0.3-1.2 kpc at the distances of our galaxies. We measure kinetic energy densities using HI and CO velocity dispersions. Results. We found a mean magnetic field strength of 3.6-12.5 $μ$G with a mean of $7.9 \pm 2.0$ $μ$G across the full sample. The magnetic field strength has the tightest and steepest relation with the total gas surface density with $B\propto Σ_{\rm HI+H2}^{0.309\pm0.006}$. The relation with the star-formation rate surface density and molecular gas surface density has significantly flatter slopes. After accounting for the influence of cosmic-ray transport, we found an even steeper relation of $B\propto Σ_{\rm HI+H2}^{0.393\pm0.009}$. Conclusions. These results suggest that the magnetic field is regulated by a $B$-$ρ$ relation, which has its origin in the saturation of the small-scale dynamo. This is borne out by an agreement of kinetic and magnetic energy densities although local deviations do exist in particular in areas of high kinetic energy densities where the magnetic field is sub-dominant.
description: Accepted to Astronomy and Astrophysics. 13 pages plus appendix including atlas of magnetic fields
Práctica docente virtual en el contexto del sars-covid-19 en la Unidad Académica de Derecho de la Universidad Autónoma de Zacatecas
Creators: name: Cardoso Pérez, Martín De Jesús
Publisher: name: FILHA
Year: 2023

description: El propósito del presente artículo es mostrar el resultado de una investigación que da cuenta de las características que adoptó la actividad docente, a través del uso de plataformas virtuales, en la Licenciatura en Derecho, de la Universidad Autónoma de Zacatecas (UAZ), durant e el periodo de confinamiento provocado por la pandemia de COVID-19. Se aplicó un diseño de tipo cuantitativo, descriptivo y transversal. Los datos requeridos se obtuvieron a través de una encuesta, aplicada de manera virtual a través de la plataforma de Google a 52 docentes en activo en el programa académico referido y que hayan dado curso en modalidad virtual, durante el semestre agosto-diciembre de 2021. Se pueden resaltar como resultados más relevantes lo sorpresivo que fue para los docentes tener que emigrar a un sistema virtual para realizar su actividad, utilizando una modalidad virtual-digital desconocida, con un respaldo y seguimiento institucional limitado. Además, destaca la necesidad de fortalecer, a través de programas institucionales, su capacitación para ejercer la docencia en entornos virtuales, considerando aspectos didáctico-pedagógicos alternativos
description: FILHA, Vol. 17 Núm. 27 (2022): Vol. 17, No 27, julio-diciembre 2022
N-bearing complex organics toward high-mass protostars: Constant ratios pointing to formation in similar pre-stellar conditions across a large mass range
Creators: name: Nazari, P.
name: Meijerhof, J. D.
name: van Gelder, M. L.
name: Ahmadi, A.
name: van Dishoeck, E. F.
name: Tabone, B.
name: Langeroodi, D.
name: Ligterink, N. F. W.
name: Jaspers, J.
name: Beltrán, M. T.
name: Fuller, G. A.
name: Sánchez-Monge, Á.
name: Schilke, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: No statistical study of COMs toward a large sample of high-mass protostars with ALMA has been carried out so far. We aim to study six N-bearing species: CH$_3$CN, HNCO, NH$_2$CHO, C$_2$H$_5$CN, C$_2$H$_3$CN and CH$_3$NH$_2$ in a large sample of high-mass protostars. From the ALMAGAL survey, 37 of the most line-rich hot molecular cores are selected. Next, we fit their spectra and find column densities and excitation temperatures of the above N-bearing species, in addition to CH$_3$OH. We (tentatively) detect CH$_3$NH$_2$ in $\sim32%$ of the sources. We find three groups of species when comparing their excitation temperatures: hot (NH$_2$CHO; Tex > 250 K), warm (C$_2$H$_3$CN, HN$^{13}$CO and CH$_{3}^{13}$CN; 100 K < Tex < 250 K) and cold species (CH$_3$OH and CH$_3$NH$_2$; Tex < 100 K). This temperature segregation reflects the trend seen in their sublimation temperatures and validates the idea of onion-like structure of COMs around protostars. Moreover, the molecules studied here show constant column density ratios across low- and high-mass protostars with scatter less than a factor $\sim3$ around the mean. The constant column density ratios point to a common formation environment of COMs or their precursors, most likely in the pre-stellar ices. The scatter around the mean of the ratios, although small, varies depending on the species considered. This spread can either have a physical origin (source structure, line or dust optical depth) or a chemical one. Formamide is most prone to the physical effects as it is tracing the closest regions to the protostars, whereas such effects are small for other species. Assuming that all molecules form in the pre-stellar ices, the scatter variations could be explained by differences in lifetimes or physical conditions of the pre-stellar clouds. If the pre-stellar lifetimes are the main factor, they should be similar for low- and high-mass protostars.
description: 49 pages, 46 figures, Accepted for publication in A&A
Lorentz-invariant topological structures of the electromagnetic field in a Fabry-Perot resonant slit-grating
Creators: name: Yakovleva, Marina
name: Pelouard, Jean-Luc
name: Pardo, Fabrice
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It is commonly assumed that the most correct description of the electromagnetic world is the abstract one, and that topological constructs such as lines of force are not covariant. In the present paper, we show that for a $y$-invariant system with a $p$-polarized electromagnetic field, it is possible to construct absolute (i.e. Lorentz invariant) lines, which we call electric spaghettis (ESs). The electromagnetic field is fully described by the ES topology that transcend the limit between space and time, plus a new invariant, the characteristic parameter $η$. In a Fabry-Perot resonant slit-grating, three ES patterns can be distinguished, corresponding to three regions: null straight lines in plane wave regions, rounded rhombuses in the interference region inside the grating, and Bernoulli's logarithmic spiral patterns - the first ever described fractals - in the funneling region.
description: 5 pages, 4 figures
Adiabatic regularization with a Yukawa interaction
Creators: name: del Rio, A.
name: Ferreiro, A.
name: Navarro-Salas, J.
name: Torrenti, F.
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: We extend the adiabatic regularization method for an expanding universe to include the Yukawa interaction between quantized Dirac fermions and a homogeneous background scalar field. We give explicit expressions for the renormalized expectation values of the stress-energy tensor $\langle T_{μν} \rangle$ and the bilinear $\langle \barψψ\rangle$ in a spatially flat FLRW spacetime. These are basic ingredients in the semiclassical field equations of fermionic matter in curved spacetime interacting with a background scalar field. The ultraviolet subtracting terms of the adiabatic regularization can be naturally interpreted as coming from appropriate counterterms of the background fields. We fix the required covariant counterterms. To test our approach we determine the contribution of the Yukawa interaction to the conformal anomaly in the massless limit and show its consistency with the heat kernel method using the effective action.
description: 31 pages, 1 figure. Small change in title. Some points have been clarified. Added references. Corrected typos
Experiencia de la implementación de programas de estudio por competencias en la Escuela de Trabajo Social de Zacatecas por Janeth Patricia Hidalgo Hernández, Fabiola Lydie Rochin Berumen y Carla Beatriz Capetillo Medrano
Creators: name: Hidalgo Hernández, Janeth Patricia
name: Rochin Berumen, Fabiola Lydie
name: Capetillo Medrano, Carla Beatriz
Publisher: name: FILHA
Year: 2023

description: La siguiente investigación tiene como finalidad conocer las experiencias de los docentesde la Escuela de Trabajo Social de Zacatecas ante la implementación de un plan de estudios porcompetencias, cabe mencionar que solo se describe la percepción de aquellos profesores que en sumomento abordaron alguna Unidad de Aprendizaje del Proyecto Curricular, el cual se diseñó bajo elEnfoque Basado en competencias (EBC). Se precisa tal información por el número de entrevistadosque pueden identificarse en el trabajo. El objetivo de esta investigación consistió en rescatar partede la subjetividad de los docentes con relación a un plan de estudios por competencias para conocercómo ha sido el desarrollo de programas de estudio por competencias en la Escuela de TrabajoSocial de Zacatecas. Para ello se aplicó el método principalmente de tipo inductivo, siendo unainvestigación básica, de alcance descriptivo. Los resultados de la misma indican que haydesconcierto y contradicción en la manera de asumir el EBC, pues en algunas respuestas señala lamayoría de los docentes tener conocimiento del mismo y tener una opinión positiva sobre el EBC,aunque en la práctica realice lo contrario. Se concluye con esta investigación que el transitar haciaun EBC para los docentes ha resultado una práctica contradictoria, con incertidumbres sobre su roly las estrategias para enseñar de tal manera. Palabras Clave: Competencias, programas, proyecto curricular. Abstract The following research aimed to investigate the experiences of teachers at the School ofSocial Work of Zacatecas before the implementation of a competency-based curriculum. It isimportant to note that this study only describes the perceptions of those teachers who addressedspecific Learning Units of the Curricular Project, which was designed under the Competency-BasedApproach (EBC, Spanish acronym). This information is limited to the number of interviewees whowere identified during the research. The objective of this study was to capture the subjectiveexperiences of teachers regarding a competency-based curriculum and understand the developmentof competency-based study programs at the School of Social Work of Zacatecas. The researchfollowed an inductive approach and had a basic descriptive scope. The results indicate that there isconfusion and contradiction in the way the EBC is understood. While some teachers claim to haveknowledge of it and hold a positive opinion, others express uncertainty. In conclusion, this researchreveals that the transition to a competency-based system for teachers has been a practice markedby contradictions, with uncertainties regarding their role and teaching strategies. Keywords: Competencies, programs, curricular project.
description: FILHA, Vol. 18 Núm. 29 (2023): Vol. 18, No. 29, Julio 2023
Dissipative time crystals with long-range Lindbladians
Creators: name: Passarelli, Gianluca
name: Lucignano, Procolo
name: Fazio, Rosario
name: Russomanno, Angelo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Dissipative time crystals can appear in spin systems, when the $Z_2$ symmetry of the Hamiltonian is broken by the environment, and the square of total spin operator $S^2$ is conserved. In this manuscript, we relax the latter condition and show that time-translation-symmetry breaking collective oscillations persist, in the thermodynamic limit, even in the absence of spin symmetry. We engineer an \textit{ad hoc} Lindbladian using power-law decaying spin operators and show that time-translation symmetry breaking appears when the decay exponent obeys $0<η\leq 1$. This model shows a surprisingly rich phase diagram, including the time-crystal phase as well as first-order, second-order, and continuous transitions of the fixed points. We study the phase diagram and the magnetization dynamics in the mean-field approximation. We prove that this approximation is quantitatively accurate, when $0<η\leq1$ and the thermodynamic limit is taken, because the system does not develop sizable quantum fluctuations, if the Gaussian approximation is considered.
description: 13 pages, 11 figures