cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The young binary HD 102077: Orbit, spectral type, kinematics, and moving group membership
Creators: name: Wöllert, Maria
name: Brandner, Wolfgang
name: Reffert, Sabine
name: Schlieder, Joshua E.
name: Mohler-Fischer, Maren
name: Köhler, Rainer
name: Henning, Thomas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The K-type binary star HD 102077 was proposed as a candidate member of the TW Hydrae Association (TWA) which is a young (5-15 Myr) moving group in close proximity (~50 pc) to the solar system. The aim of this work is to verify this hypothesis by different means. We first combine diffraction-limited observations from the ESO NTT 3.5m telescope in SDSS-i' and -z' passbands and ESO 3.6m telescope in H-band with literature data to obtain a new, amended orbit fit, estimate the spectral types of both components, and reanalyse the Hipparcos parallax and proper motion taking the orbital motion into account. Moreover, we use two high-resolution spectra of HD 102077 obtained with the fibre-fed optical echelle spectrograph FEROS at the MPG/ESO 2.2m telescope to determine the radial velocity and the lithium equivalent width of the system. The trajectory of HD 102077 is well constrained and we derive a total system mass of $2.6 \pm 0.8\,$ M$_{\odot}$ and a semi-major axis of $14.9 \pm 1.6\,$AU. From the i'-z' colours we infer an integrated spectral type of K2V, and individual spectral types of K0 +/- 1 and K5 +/- 1. The radial velocity corrected for the orbital motion of the system is $17.6 \pm 2\,$km/s. Even though the parallax determination from the Hipparcos data is not influenced by the orbital motion, the proper motion changes to $μ_α*\cos(δ) = -137.84 \pm 1.26\,$ mas/yr and $μ_δ= -33.53 \pm 1.45 \,$mas/yr. With the resultant space motion, the probability of HD 102077 being a member of TWA is less than 1%. Furthermore, the lithium equivalent width of $200 \pm 4\,$mÅ$\,$ is consistent with an age between 30 Myr and 120 Myr and thus older than the predicted age of TWA. In conclusion, HD 102077's age, galactic space motion, and position do not fit TWA or any other young moving group.
Additional file 2 of Ocean depth–temperature profiles for operational oceanography from a shark-borne transmitter
Creators: name: Holland, Kim
name: Meyer, Carl
name: Potemra, James
name: Holland, Melinda
Publisher: name: figshare
Year: 2022
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 2: Table S1. Pre and Post-Deployment sensor calibrations.
Additional file 1 of How can artificial intelligence optimize value-based contracting?
Creators: name: Poveda, Jose Luis
name: Bretón-Romero, Rosa
name: Del Rio-Bermudez, Carlos
name: Taberna, Miren
name: Medrano, Ignacio H.
Publisher: name: figshare
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Additional file 1. Supplemental Table 1. List of approved and publicly available Value-Based Contracts (VBC) in USA, Europe, and UK (2015-2021).
Self-truncated ionization injection and consequent monoenergetic electron bunches in laser wakefield acceleration
Creators: name: Zeng, Ming
name: Chen, Min
name: Sheng, Zheng-Ming
name: Mori, Warren B.
name: Zhang, Jie
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The ionization-induced injection in laser wakefield acceleration has been recently demonstrated to be a promising injection scheme. However, the energy spread controlling in this mechanism remains a challenge because continuous injection in a mixed gas target is usually inevitable. Here we propose that by use of certain initially unmatched laser pulses, the electron injection can be constrained to the very front region of the mixed gas target, typically in a length of a few hundreds micro meters determined by laser-driven bubble deformation. Under some optimized conditions, the injection region is well limited within $200\rm μm$ and the electron beam with central energy of 383 MeV, energy spread of 3.33% in FWHM, normalized emittance of 3.12 mm mrad and charge of 14.58 pC can be obtained according to particle-in-cell simulations. Both multi-dimensional simulations and theoretical analysis illustrate the effectiveness of this scheme.
description: 5 pages, 5 figures
Additional file 1 of Using non-parametric Bayes shrinkage to assess relationships between multiple environmental and social stressors and neonatal size and body composition in the Healthy Start cohort
Creators: name: Martenies, Sheena E.
name: Hoskovec, Lauren
name: Wilson, Ander
name: Moore, Brianna F.
name: Starling, Anne P.
name: Allshouse, William B.
name: Adgate, John L.
name: Dabelea, Dana
name: Magzamen, Sheryl
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy

description: Additional file 1. Supplemental Materials.
BANYAN. III. Radial velocity, Rotation and X-ray emission of low-mass star candidates in nearby young kinematic groups
Creators: name: Malo, Lison
name: Artigau, Étienne
name: Doyon, René
name: Lafrenière, David
name: Albert, Loïc
name: Gagné, Jonathan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Based on high-resolution spectra obtained with PHOENIX at Gemini-South, CRIRES at VLT-UT1, and ESPaDOnS at CFHT, we present new measurements of the radial and projected rotational velocities of 219 low-mass stars. The target likely membership was initially established using the Bayesian analysis tool recently presented in \citet{2013malo}, taking into account only the position, proper motion and photometry of the stars to assess their membership probability. In the present study, we include radial velocity as an additional input to our analysis, and in doing so we confirm the high membership probability for 130 candidates: 27 in $β$ Pictoris, 22 in Tucana-Horologium, 25 in Columba, 7 in Carina, 18 in Argus and 18 in AB Doradus and 13 with an ambiguous membership. Our analysis also confirms the membership of 57 stars proposed in the literature. A subsample of 16 candidates was observed at three or more epochs, allowing us to discover 6 new spectroscopic binaries. The fraction of binaries in our sample is 25%, consistent with values in the literature. Twenty percent of the stars in our sample show projected rotational velocities (\vsini) higher than 30 \kms\ and therefore are considered as fast rotators. A parallax and other youth indicators are still needed to fully confirm the 130 highly probable candidates identified here as new {\it bona fide} members. Finally, based on the X-ray emission of {\it bona fide} and highly probable group members, we show that for low-mass stars in the 12-120 Myr age range, the X-ray luminosity is an excellent indicator of youth and better than the more traditionally used R$_{\rm X}$ parameter, the ratio of X-ray to bolometric luminosity.
NIVEL DE CONOCIMIENTO SOBRE EL VIRUS DEL PAPILOMA HUMANO EN MUJERES JÓVENES
Creators: name: Pérez Briones, Nancy Griselda
name: De Los Santos Reyna, Lizeth Alejandra
name: Ponce Contreras, María Guadalupe
name: Villa-Rivas, Fani
name: Castillo Díaz, Rocío
Publisher: name: IBN SINA
Year: 2023

description: Propósito y Método del Estudio: El propósito del estudio fue determinar el nivel de conocimiento del virus del papiloma humano en mujeres jóvenes. Se empleó un diseño descriptivo transversal. La población de estudio estuvo conformada por 415 mujeres entre 20 y 40 años de una comunidad urbana de la ciudad de Monclova, Coahuila. El tamaño de la muestra fue de 201 participantes. El muestreo fue de tipo no probabilístico por conveniencia. Para la medición de las variables, se utilizó una cedula de datos sociodemográfica, el instrumento de nivel de conocimiento del virus del papiloma humano. Se utilizó estadística descriptiva. Para conocer las características generales, del nivel de virus del papiloma humano se utilizaron frecuencias y porcentajes para las variables categóricas, y medidas de tendencia central y dispersión para las variables numéricas. Resultados y Conclusiones: La media de edad de los participantes fue de 29 años (DE= 6.74). El 91.5% presentó tener un alto nivel de conocimiento del virus del papiloma humano. En conclusión, la mayoría de las participantes tienen un alto nivel de conocimiento del VPH, lo que se atañe a que cuentan con una pareja sexual y con estudios de licenciatura Palabras Clave: Conocimiento, virus del papiloma humano, mujeres.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
Fundamental properties of solar-like oscillating stars from frequencies of minimum $Δν$: I. Model computations for solar composition
Creators: name: Yıldız, M.
name: Orhan, Z. Çelik
name: Aksoy, Ç.
name: Ok, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Low amplitude is the defining characteristic of solar-like oscillations. The space projects $Kepler$ and $CoRoT$ give us a great opportunity to successfully detect such oscillations in numerous targets. Achievements of asteroseismology depend on new discoveries of connections between the oscillation frequencies and stellar properties. In the previous studies, the frequency of the maximum amplitude and the large separation between frequencies were used for this purpose. In the present study, we confirm that the large separation between the frequencies has two minima at two different frequency values. These are the signatures of the He {\small II} ionization zone, and as such have very strong diagnostic potential. We relate these minima to fundamental stellar properties such as mass, radius, luminosity, age and mass of convective zone. For mass, the relation is simply based on the ratio of the frequency of minimum $Δν$ to the frequency of maximum amplitude. These frequency comparisons can be very precisely computed, and thus the mass and radius of a solar-like oscillating star can be determined to high precision. We also develop a new asteroseismic diagram which predicts structural and evolutionary properties of stars with such data. We derive expressions for mass, radius, effective temperature, luminosity and age in terms of purely asteroseismic quantities. For solar-like oscillating stars, we now will have five very important asteroseismic tools (two frequencies of minimum $Δν$, the frequency of maximum amplitude, and the large and small separations between the oscillation frequencies) to decipher properties of stellar interior astrophysics.
description: 13 pages, 19 figures. MNRAS 2014
Molecular dynamics simulations of cumulative helium bombardments on tungsten surfaces
Creators: name: Li, Min
name: Cui, Jiechao
name: Wang, Jun
name: Hou, Qing
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Molecular dynamics (MD) simulations were performed to study the cumulative bombardments of low-energy (60-200 eV) helium (He) atoms on tungsten (W) surfaces. The behaviour of He and the response of the W surface were investigated. The He incident energy and tungsten temperature play important roles on the formation and growth of He clusters. The temperature can promote the coalescence of He clusters and increase the size of the He clusters. A stratification phenomenon of the He depth distribution has been observed. The rupture of the He clusters and, at the same time, the escape and re-deposition of the W atoms have been observed. During the formation of He clusters, the interstitial W atoms are produced and evolve into bundles of <111> crowdions, which would be constrained around the He clusters for a long time. However, they will finally move onto the top surface along the <111> direction, which results in stacking the W atoms on the surface. The complex combination effects of the He clusters and the interstitial atoms result in the growth of the surfaces.
Estimating the aggregate/intraaggregate mass ratio of a shrinking soil
Creators: name: Chertkov, V. Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geophysics (physics.geo-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A recently introduced parameter, the ratio of an aggregate solid mass to a solid mass of an intraaggregate matrix (K ratio) is connected with the mean thickness of a deformable, but non-shrinking surface layer of aggregates and is a fundamental property of aggregated soils that essentially influences their shrinkage. The objective of this work is to suggest and validate an approach to estimating the K ratio at any soil clay content through characteristics of soil texture and structure. We derive an equation that reflects the interrelation between the K ratio and soil texture and structure. The K ratio can be estimated as the solution of the equation and is determined by the mean size of soil solids and the maximum size of soil aggregates in the oven-dried state, independently of a measured shrinkage curve. To validate the approach we use available data for eight soils.
description: 8 pages, 1 figure, 3 tables
RIESGO TOXICOLÓGICO POR PLOMO, CADMIO Y MANGANESO EN SUELOS DEL DR028, TULANCINGO, HIDALGO, MÉXICO
Creators: name: Romero-Oliva, Oscar Jesús
name: Acevedo-Sandoval, Otilio Arturo
name: Prieto-García, Francisco
name: Prieto-Méndez, Judith
Publisher: name: IBN SINA
Year: 2023

description: Introducción: En México, los Distritos de Riego (DR) son proyectos de irrigación agrícola. El DR028 abarca gran parte de Tulancingo, Hidalgo. Las parcelas regadas con agua del DR028 pueden presentar contaminación por metales pesados debido a la naturaleza de la misma, que es residual. Objetivo: El objetivo del presente trabajo es determinar la presencia de plomo (Pb), cadmio (Cd) y manganeso (Mn) en suelos del DR028 para realizar una Evaluación de Riesgo Toxicológico (ERT) en población adulta por exposición a estos metales. Métodos y materiales: La colecta y preparación de las muestras de suelo se hizo con base en la NOM-021-RECNAT-2000. Se determinó la presencia de metales por fotocolorimetría en extracto de saturación de suelo. La ERT se realizó a través de la metodología OMS/OPS y ATSDR para evaluación de riesgos, calculando la Dosis de Exposición (DE) y el Cociente de Riesgo (CR). Resultados: La concentración promedio de estos metales en suelos de las parcelas (mg/kg), fue de 0.9 para plomo, 0.25 para cadmio y de 43.4 para manganeso. La DE (mg/kg/día) calculada fue de 0.0003857 para plomo, 0.000076429 para cadmio y 1.426 para manganeso. El CR para Pb fue de 2.755, para Cd de 0.076 y para Mn de 10.19. Conclusión: De acuerdo con el CR calculado, existe un riesgo toxicológico aceptable por exposición a plomo y manganeso en pobladores de las zonas urbanas y periurbanas del DR028. Para cadmio el riesgo es inaceptable, aunque es importante analizar otras matrices ambientales como agua y aire.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
Adsorption of ammonia at GaN(0001) surface in the mixed ammonia/hydrogen ambient - a summary of ab initio data
Creators: name: Kempisty, Pawel
name: Krukowski, Stanislaw
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Adsorption of ammonia at NH3/NH2/H covered GaN(0001) surface was analyzed using results of ab initio calculations. The whole configuration space of partially NH3/NH2/H covered GaN(0001) surface was divided into zones differently pinned Fermi level: at Ga broken bond state for dominantly bare surface (region I), at VBM for NH2 and H covered (region II), and at CBM for NH3 covered surface (region III). The extensive ab intio calculations show validity of electron counting rule (ECR) for all mixed coverage, for bordering these three regions. The adsorption was analyzed using newly identified dependence of the adsorption energy on the charge transfer at the surface. For region I and II ammonia adsorb dissociatively, disintegrating into H adatom and HN2 radical for large fraction of vacant sites while for high coverage the ammonia adsorption is molecular. The dissociative adsorption energy strongly depends on the Fermi level at the surface (pinned) and in the bulk (unpinned) while the molecular adsorption energy is determined by bonding to surface only, in accordance to the recently published theory. The molecular adsorption is determined by the energy of covalent bonding to the surface. Ammonia adsorption in region III (Fermi level pinned at CBM) leads to unstable configuration both molecular and dissociative which is explained by the fact that Ga-broken bond sites are doubly occupied by electrons. The adsorbing ammonia brings 8 electrons to the surface, necessitating transfer of the electrons from Ga-broken bond state to Fermi level, energetically costly process. Adsorption of ammonia at H-covered site leads to creation of NH2 radical at the surface and escape of H2 molecule. The process energy is close to 0.12 eV, thus not large, but the inverse process is not possible due to escape of the hydrogen molecule.
description: 37 pages, 14 figures
RR Lyrae in XSTPS: The halo density profile in the North Galactic Cap
Creators: name: Faccioli, Lorenzo
name: Smith, Martin C.
name: Yuan, H. -B.
name: Zhang, H. -H.
name: Liu, X. -W.
name: Zhao, H. -B.
name: Yao, J. -S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a catalog of RR Lyrae stars (RRLs) observed by the Xuyi Schmidt Telescope Photometric Survey (XDSS). The area we consider is located in the North Galactic Cap, covering 376.75 sq deg at RA $\approx$ 150 deg and Dec $\approx$ 27 deg down to a magnitude limit of i $\approx$ 19. Using the variability information afforded by the multi-epoch nature of our XDSS data, combined with colors from the Sloan Digital Sky Survey, we are able to identify candidate RRLs. We find 318 candidates, derive distances to them and estimate the detection efficiency. The majority of our candidates have more than 12 observations and for these we are able to calculate periods. These also allows us to estimate our contamination level, which we predict is between 30% to 40%. Finally we use the sample to probe the halo density profile in the 9-49 kpc range and find that it can be well fitted by a double power law. We find good agreement between this model and the models derived for the South Galactic Cap using the Watkins et al. (2009) and Sesar et al. (2010) RRL data-sets, after accounting for possible contamination in our data-set from Sagittarius stream members. We consider non-spherical double power law models of the halo density profile and again find agreement with literature data-sets, although we have limited power to constrain the flattening due to our small survey area. Much tighter constraints will be placed by current and future wide-area surveys, most notably ESA's astrometric Gaia mission. Our analysis demonstrates that surveys with a limited number of epochs can effectively be mined for RRLs. Our complete sample is provided as accompanying online material.
description: 14 pages, ApJ (in press)
Density and current of a dissipative Schrödinger operator
Creators: name: Kaiser, Hans-Christoph
name: Neidhardt, Hagen
name: Rehberg, Joachim
Publisher: name: Weierstrass Institute
Year: 2002
Subjects: subject: open Schrödinger-Poisson systems
subject: carrier and current density
subject: dissipative Schrödinger operator
subject: self-adjoint dilation
subject: generalized eigenfunctions
subject: characteristic function
subject: density matrix
subject: 47A20
subject: 34B24
subject: 47A55
subject: 47B44

description: A net current flow through an open 1-dimensional Schrödinger-Poisson system is modeled by replacing self-adjoint boundary conditions by dissipative ones. To give a rigorous definition of carrier and current densities the well-known dilation theory of dissipative operators is used where the self-adjoint dilation is regarded as the Hamiltonian of a larger closed system which contains the open one. The carrier density turns out to be performed by the generalized eigenstates of the dilation while the current density is related to the characteristic function of the dissipative operator. A rigorous setup of a dissipative Schrödinger-Poisson system is outlined.
Critical temperature of site-diluted spin-1/2 systems with long-range ferromagnetic interactions
Creators: name: Szałowski, Karol
name: Balcerzak, Tadeusz
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In the paper the Pair Approximation (PA) method for studies of the site-diluted spin-1/2 systems of arbitrary dimensionality with the long-range ferromagnetic interactions is adopted. The method allows to take into account arbitrary anisotropy of the interactions in the spin space, so it is not limited to purely Ising couplings. Within this approach, the Gibbs free energy is obtained, which allows to derive all the further interesting thermodynamic properties. In particular, we obtain an equation for the critical temperature of the second-order phase transitions for the model in question. In the study we focus our attention on the systems with ferromagnetic interactions decaying with the distance according to the power law $J(r)\propto r^{-n}$. We discuss the dependence of the critical temperature on the concentration of magnetic component and the index $n$ for selected one-, two- and three-dimensional lattices.We confirm the absence of the critical concentration for a diluted magnet with infinite interaction range. In the regime of the low concentrations of magnetic component, we find a non-linear increase of the critical temperature with the concentration in the form of $T_{c}\propto p^{n/d}$, depending on the system dimensionality $d$ and the index $n$, whereas $n > d$.
$R^n$ gravity is kicking and alive: the cases of Orion and NGC 3198
Creators: name: Salucci, Paolo
name: Martins, Christiane Frigerio
name: Karukes, Ekaterina
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyzed the Rotation Curves of two crucial objects, the Dwarf galaxy Orion and the low luminosity Spiral NGC 3198, in the framework of $R^n$ gravity. We surprisingly found that the no DM power-law f(R) case fits them well, performing much better than $Λ$CDM Dark Matter halo models. The level of this unexpected success can be a boost for $R^n$ gravity.
description: This essay received an honorable mention in the Gravity Research Foundation 2014 Essay Contest. 6 pg, 1 fig
ASSESSMENT OF PROJECT MONITORING & EVALUATION PRACTICES AT DIRE DAWA DIESEL POWER PLANT REHABILITATION PROJECT
Creators: name: Muluken Tessema
Publisher: name: Zenodo
Year: 2017

description: Project monitoring and evaluation process is critical for the success of a project, since it is

the most integrated process of all. Besides its own intended activities, the process measures

the performance of other process groups. However, the results in previous studies at various

projects show low rating practices of monitoring and evaluation. The challenges of project

monitoring and evaluation process observed in most projects may generate from internal or

external factors. The internal factors could be: perception (implementer’s altitude &

commitment), M&E planning quality, selection of M&E tools, M&E expert level and

budgeting; whereas, the external challenges may arise from: organization policy, stakeholder

communication or politics.
BURNOUT Y RENDIMIENTO ACADÉMICO EN ESTUDIANTES UNIVERSITARIOS ANTE PANDEMIA DE COVID-19
Creators: name: Torres-Zapata, Ángel Esteban
name: Zarza-García, Addy Leticia
name: Acevedo Olvera, Gloria Esther
name: Brito-Cruz, Teresa De Jesús
Publisher: name: IBN SINA
Year: 2023

description: Introducción: En el contexto educativo, el burnout surge de la presunción de presiones y sobrecargas propias de la labor académica, percibidas por actores de la comunidad educativa. Los estudiantes, al igual que cualquier trabajador, mantienen una relación de compensación directa e indirecta con la institución educativa, como apoyos económicos, becas, reconocimientos o premios. Objetivo: Valorar la presencia de burnout entre los alumnos, como un factor que puede incidir en el rendimiento académico. Materiales y métodos: Estudio con enfoque cuantitativo, alcance exploratorio, descriptivo y diseño no experimental-correlacional. El muestreo fue a conveniencia. Se utilizó la escala unidimensional del burnout estudiantil (EUBE). Para el procesamiento y análisis de la información se utilizó el programa SPSS v.22.0. Resultados: La población compuesta por 114 estudiantes universitarios, constituida por 64.91 por ciento del género femenino y 35.09 por ciento del masculino (n=40). En relación al burnout académico el 93.86 por ciento de los sujetos estudiados se encuentra dentro del rango leve, el 3.51 por ciento moderado y el 0.88 por ciento profundo. El componente comportamental fue superior, con un 85.96 por ciento, el actitudinal corresponde al 46.49 por ciento. No existe una correlación estadísticamente significativa (p=>0.05) entre el síndrome de burnout y el rendimiento académico. Conclusiones: La totalidad de la población presenta burnout, la mayoría en el grado leve, con mayor preponderancia en el indicador comportamental; el género no se relaciona con la incidencia de burnout, ya que ambos géneros presentan niveles bajos. No se encontraron relaciones estadísticamente significativas que expliquen el bajo rendimiento académico.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
title: Synthesis and Properties of syn-[2.2](1,6)- and (4,6)Azulenophanes and Macrocyclic Azulenophanes
Creators: name: Chen, Shu-Ling
name: Klein, Roland
name: Hafner, Klaus
Publisher: name: Wiley-VCH
Year: 2022

description: A regioselective synthesis of syn-[2.2](1,6)azulenophane (9) and syn-[2.2](4,6)azulenophane (12) is described. Azulenophane 9 is prepared by deprotonation of 1,2-bis(6-methylazulen-1-yl)ethane (5), followed by oxidative coupling of the initially formed dilithium salt 8 with iodine under high-dilution conditions in 17% yield, along with the macrocyclic [2.2.2.2](1,6)azulenophane (10) (3%), and [2.2.2.2.2.2](1,6)azulenophane (11) (1.5%). The azulenophane 12 and the macrocyclic [2.2.2.2](4,6)azulenophane (13) are obtained by coupling of the dianion of 1,2-bis(4-methylazulen-6-yl)ethane (14). The structural assignments of the title compounds are based on their spectral data. Protonation of 9 furnishes the mono- and dications 24 and 25, respectively, of which the first exhibits a charge-transfer band in its electronic spectrum, indicating a transannular interaction between the protonated and unprotonated azulene units. Protonation of 12 yields the mono- and dications 26 and 27, respectively. In contrast to 24, no new band due to an intramolecular transannular charge-transfer interaction is observed in the electronic spectrum of 26, and this is due to an insufficient overlap between the protonated and unprotonated azulene decks in 26. Vilsmeier formylation of 9 with 1.5 mol equivalents of phosphoryl chloride in DMF at room temp. yields 3-formyl-syn-[2.2](1,6)azulenophane (28) in 15% yield. Under the same reaction conditions a double formylation of 9 with 3 mol equivalents of phosphoryl chloride leads to 3,3′-diformyl-syn-[2.2](1,6)azulenophane (29) in 42% yield. The aminomethylation of 9 with paraformaldehyde and N, N, N′, N′-tetramethyldiaminomethane in the presence of acetic acid furnishes the Mannich bases 3-N, N-dimethylaminomethyl-syn-[2.2](1,6)azulenophane (30) and 3,3′-bis(N, N-dimethylaminomethyl)-syn-[2.2](1,6)azulenophane (31) in 40% and 46% yields, respectively.
On modification of the Newton's law of gravity at very large distances
Creators: name: Kirillov, Alexandr A.
name: Turaev, Dmitry
Publisher: name: Weierstrass Institute
Year: 2002
Subjects: subject: dark matter problem

description: We discuss a Modified Field Theory (MOFT) in which the number of fields can vary. It is shown that when the number of fields is conserved MOFT reduces to the standard field theory but interaction constants undergo an additional renormalization and acquire a dependence on spatial scales. In particular, the renormalization of the gravitational constant leads to the deviation of the law of gravity from the Newton's law in some range of scales rmin< r < rmax, in which the gravitational potential shows essentially logarithmic ln r (instead of 1/r) behavior. In this range, the renormalized value of the gravitational constant G increases and atscales r > rmax acquires a new constant value G' Grmaxrmin. From the dynamical standpoint this looks as if every point source is surrounded with a halo of dark matter. It is also shown that if the maximal scale rmax is absent, the homogeneity of the dark matter in the Universe is consistent with a fractal distribution of baryons in space, in which the luminous matter is located on thin two-dimensional surfaces separated by empty regions of ever growing size.
An Introduction to Socially Connected Machines: Characteristics and Applications
Creators: name: Shim, Taehyoung
name: Kim, Dong Min
name: Kim, Seong-Lyun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Social and Information Networks (cs.SI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Due to the development of information and communication technologies, it is difficult to handle the billions of connected machines. In this paper, to cope with the problem, we introduce machine social networks, where they freely follow each other and share common interests with their neighbors. We classify characteristics and describe required functionalities of socially connected machines. We also illustrate two examples; a twit-bot and maze scenario.
PROGRAMA PROSPERA CON CONTROL DEL NIÑO SANO Y LA SALUD DE NIÑOS DE CAMARGO, TAMAULIPAS
Creators: name: Morín, Joselín Esquivias
name: Mayek-Perez, Netzahualcoyotl
Publisher: name: IBN SINA
Year: 2023

description: Objetivo: Evaluar la efectividad del Programa PROSPERA con Control del Niño Sano tanto en población derechohabiente como abierta del Centro de Salud con Servicios Ampliados de Camargo, Tamaulipas de enero a septiembre del 2018. Métodos: Investigación cuantitativa, estudio retrospectivo longitudinal de intervención (65 niños de 0 a 5 años) con grupo de comparación (21 niños de población abierta). Resultados: De los 86 pacientes incluidos, 44 fueron niñas y 42 niños. La edad promedio fue de 2.7 años, peso = 14.2 kg, talla = 0.92 m, Índice de Masa Corporal (IMC) = 16.6. Los niños inscritos en PROSPERA exhibieron mayor (p<0.05) edad, peso y talla, mientras que entre géneros no hubo diferencias significativas (p<0.05) para ninguna variable. La mayoría de los infantes muestran un estatus normal en cuanto a IMC y relación talla/edad (T/E). Los niños de PROSPERA exhibieron los mayores promedios (IMC normal = 92 por ciento; T/E = 96 por ciento) comparados con los de población abierta (IMC normal = 67; T/E = 81). Mayores valores de sobrepeso, obesidad, desnutrición ligera y T/E alta se observaron en población abierta; además de valores similares en incidencia de enfermedades en cada población (Población abierta = 0.88 enfermedades/paciente; Población PROSPERA = 1.02); donde los padecimientos más frecuentes fueron las enfermedades respiratorias (Abierta: 62 por ciento; PROSPERA: 50 por ciento). Conclusiones: El programa PROSPERA con Control del Niño Sano reportó resultados positivos en la población infantil inscrita de Camargo, Tamaulipas en cuanto a crecimiento, salud y control nutricional en comparación con niños de población abierta.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
THE STUDY OF ASSOCIATIVE MEANING IN THE SLOGAN OF SKINCARE ADVERTISEMENT
Creators: name: Haryani, Haryani
name: Rosyidah Azmie Putry, Ainur
name: Vidhiasi, Dhion Meitreya
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 470409
subject: Linguistic structures (incl. phonology, morphology and syntax)

description: To promote and market a product, many companies try to create a good slogan for their advertisement. However, due to the existence of the language variety used, it made people difficult to obtain the meaning of the advertisement content. Thus, the researchers were encouraged to analyze the type of associative meaning based on the theory of Geoffrey Leech and the slogan itself was only focused on the link of skincare product website www.littletreeorganics.com.au. In this research, a descriptive qualitative method, and a predefined set of procedures were employed to answer the questions and to collect the evidence as well. The results of the study revealed that there were some associative meanings found in the little tree organics advertisement slogan. It was involving connotative meaning (3 data), affective meaning (3 data), reflective meaning (5 data), collocative meaning (1 data) and no social meaning. Here, the researchers also provided an intense reason why those slogans belong to each meaning of the associative meanings. Based on the data above, this indicated that the advertiser aimed to explain the intrinsic aspect of language within the advertisement slogan, which could be seen from the dominant meanings appeared. They were reflective meaning, affective meaning, connotative meaning, and followed by collocative meaning. But on the other hand, the reflective meaning is the highest one from all.
Directional superradiant emission from statistically independent incoherent non-classical and classical sources
Creators: name: Oppel, S.
name: Wiegner, R.
name: Agarwal, G. S.
name: von Zanthier, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superradiance is one of the outstanding problems in quantum optics since Dicke introduced the concept of enhanced directional spontaneous emission by an ensemble of identical two-level atoms. The effect is based on correlated collective Dicke states which turn out to be highly entangled. Here we show that enhanced directional emission of spontaneous radiation can be produced also with statistically independent incoherent sources via the measurement of higher order correlation functions of the emitted radiation. Our analysis is applicable to a wide variety of quantum systems like trapped atoms, ions, quantum dots or NV-centers, and is also valid for statistically independent incoherent classical emitters. This is experimentally confirmed with up to eight independent thermal light sources.
description: 5 pages, 4 figures
Investigation of beam-induced dynamics in oxide glasses via aXPCS
Creators: name: Legenstein, Michael
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2018

description: Masterarbeit, University of Vienna, 2018; University of Vienna 63 pp. (2018). = Masterarbeit, University of Vienna, 2018
description: Investigating diffusion in solid state matter has been a long-standing challenge. In recent years a new technique called atomic-scale X-ray Photon Correlation Spectroscopy (aXPCS) has emerged. Its working principle is the same as for the long established Dynamic Light scattering, but with \text{X-rays} instead of visible light. The successful realization of an aXPCS experiment was made possible by powerful new X-rays sources like third-generation synchrotrons and free-electron lasers. Ideally, the X-ray beam would only measure internal dynamics and leave the system unperturbed otherwise. However, a recent study has shown that the dynamics in vitreous silica and germanium, measured via aXPCS is proportional to the flux of the beam, while the dynamics in metallic glasses and single-crystalline Cu_90Au_10 does not show this behaviour. This indicates that aXPCS does not only probe dynamics in some materials like oxide glasses, but also induces dynamics. Further investigations of this beam-induced dynamics will be the focus of this thesis. The thesis begins with a theoretical treatment of aXPCS as well as network glasses in general and oxide glasses in particular. Then the experimental approach and the data evaluation process will be presented in detail. In the main part the effects of the beam on the dynamics of a wide range of oxide glasses will be investigated. It will be shown that the dynamics in all glasses show a dependence on the photon flux. The dynamics measured at room temperature is proportional to the flux in all glasses, indicating that the dynamics is entirely beam-induced. At temperatures well above room temperature the influence of the beam becomes significantly smaller, hinting at a mixture of beam-induced and internal dynamics. Furthermore, the characteristics of the induced dynamics will be explored in detail. Finally, the consequences of beam-induced dynamics on future aXPCS experiments will be discussed and some possible mechanisms underlying beam-induced dynamics presented.
description: Published by University of Vienna
Editorial Board: The Quarterly Journal of Studies on Alcohol (1965-1969)
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1969

description: Copies of pages listing members of the editorial board of the Quarterly Journal of Studies on Alcohol. The Quarterly Journal of Studies on Alcohol, ISSN: 0033-5649 was founded in 1940 by Howard W. Haggard, M.D., director of Yale University’s Laboratory of Applied Physiology. Later it was renamed the Journal of Studies on Alcohol, and is currently called the Journal of Studies on Alcohol and Drugs, published at the Rutgers Center of Alcohol Studies.
TRANSICIÓN DEL ETIQUETADO NUTRIMENTAL EN MÉXICO. FACTORES QUE DIFICULTAN SU EFECTIVIDAD EN JÓVENES UNIVERSITARIOS
Creators: name: Esparza Reyes, Adriana
name: Almeida Perales, Cristina
name: García Zamora, Pascual G
Publisher: name: IBN SINA
Year: 2023

description: Resumen El objetivo del ensayo es analizar la transición del etiquetado nutrimental en México y los factores que dificultan su efectividad en población universitaria. En los últimos años se ha manifestado la necesidad de tener un sistema de etiquetado que sea fácil de comprender y que promueva la elección de productos alimenticios saludables. Anteriormente, las etiquetas GDA se implementaron entre el gobierno mexicano y la industria de alimentos procesados; no obstante, careció de sustento científico y requería cálculos matemáticos o conocimientos avanzados sobre nutrición para poder ser interpretadas. Con la presión de agrupaciones civiles y bajo el contexto de obesidad en México, se dio una transición del etiquetado en el 2020 por los Sellos de Advertencia, implementados exitosamente en países de Sudamérica y Europa, tienen el propósito de comunicar de manera sencilla el contenido excesivo de nutrientes críticos, sin embargo, se han presentado controversias al respecto. Por su parte, existen limitaciones en la efectividad del etiquetado, como son las actitudes hacia una dieta saludable, conocimientos sobre nutrición y falta de comprensión. Palabras clave: Etiquetado nutrimental, sellos de advertencia, guías diarias de alimentación.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
SEGURIDAD Y SISTEMAS ALIMENTARIOS EN MÉXICO
Creators: name: González Catalán, Miriam Del Carmen
name: Rodriguez-Orozco, Alain R
Publisher: name: IBN SINA
Year: 2023

description: Se revisó la integración entre entornos alimentarios, sistemas alimentarios y seguridad alimentaria y se describen algunos rasgos identitarios de estas relaciones en el caso mexicano a través del análisis de documentos de organizaciones internacionales y publicaciones nacionales basadas en registros estandarizados como los usados como las encuestas ENSANUT, INEGI y CONEVAL. De una base de 145 documentos se eligieron 31 que cumplieron estos requisitos usando google y pubmed con las palabras clave, seguridad alimentaria, entornos y ambientes alimentarios y sistemas alimentarios, con énfasis en México. Se requieren diseños regionales sólidos para responder a problemas específicos de la seguridad alimentaria a través del análisis cuanti-cualitativo de los entornos alimentarios y los sistemas alimentarios en relación con la nutrición y el acceso a una alimentación saludable en poblaciones en riesgo de malnutrición. El complejo panorama nacional tanto por su heterogeneidad como por el desigual reparto de la riqueza obliga a optimizar el uso de los recursos regionales para obtener resultados en periodos variables con metas viables. Se requiere un nivel mayor de involucramiento de los investigadores tanto con la cultura local como con los sistemas que determinan la administración estos recursos.
description: IBN SINA, Vol. 14 Núm. 1 (2023): Vol. 14, ene-jul, 2023
Micrometer-Thin Crystalline-Silicon Solar Cells Integrating Numerically Optimized 2-D Photonic Crystals
Creators: name: Depauw, V.
name: Meng, X.
name: Daif, O. El
name: Gomard, G.
name: Lalouat, L.
name: Drouard, E.
name: Trompoukis, C.
name: Fave, A.
name: Seassal, C.
name: Gordon, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A 2-D photonic crystal was integrated experimentally into a thin-film crystalline-silicon solar cell of 1-μm thickness, after numerical optimization maximizing light absorption in the active material. The photonic crystal boosted the short-circuit current of the cell, but it also damaged its open-circuit voltage and fill factor, which led to an overall decrease in performances. Comparisons between modeled and actual optical behaviors of the cell, and between ideal and actual morphologies, show the global robustness of the nanostructure to experimental deviations, but its particular sensitivity to the conformality of the top coatings and the spread in pattern dimensions, which should not be neglected in the optical model. As for the electrical behavior, the measured internal quantum efficiency shows the strong parasitic absorptions from the transparent conductive oxide and from the back-reflector, as well as the negative impact of the nanopattern on surface passivation. Our exemplifying case, thus, illustrates and experimentally confirms two recommendations for future integration of surface nanostructures for light trapping purposes: 1) the necessity to optimize absorption not for the total stack but for the single active material, and 2) the necessity to avoid damage to the active material by pattern etching.
description: Authors' postprint version - Editor's pdf published online on Nov. 5
Ultrahigh energy particle collisions near the black hole horizon in the strong magnetic field
Creators: name: Zaslavskii, O. B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider collision between two charged (or charged and neutral) particles near the black hole horizon in the strong magnetic field B. It is shown that there exists a strip near the horizon within which collision of any two such particles leads to ultrahigh energy in the centre of mass frame. The results apply to generic (not necessarily vacuum) black holes.
description: 6 pages
Interacting CMEs and their associated flare and SEP activities
Creators: name: Shanmugaraju, A.
name: Subramanian, S. Prasanna
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have analyzed a set of 25 interacting events which are associated with the DH type II bursts. These events are selected from the Coronal Mass Ejections observed during the period 1997-2010 in SOHO/LASCO and DH type IIs in Wind/WAVES. Their pre and primary CMEs from nearby active regions are identified using LASCO and EIT images and their height-time diagrams. Their interacting time and height are obtained, and their associated activities, such as, flares and solar energetic particles (>10pfu) are also investigated. Results from the analysis are: primary CMEs are much faster than the pre-CMEs, their X-ray flares are also stronger (X and M class) compared to the flares (C and M class) of pre-CMEs. Most of the events occurred during the period 2000-2006. From the observed width and speed of pre and primary CMEs, the pre-CMEs are found to be less energetic than the primary CMEs. While the primary CMEs are tracked up to the end of LASCO field of view, most of the pre-CMEs are tracked up to < 26Rs. The SEP intensity is found to be related with the integrated flux of the X-ray flares associated with the primary CMEs for nine events originating from the western region.
description: Accepted in Astrophysics and Space Science
Neutrino and Cosmic-Ray Release from Gamma-Ray Bursts: Time-Dependent Simulations
Creators: name: Asano, Katsuaki
name: Meszaros, Peter
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We revisit the neutrino and ultra high-energy cosmic ray (UHECR) production from gamma-ray bursts (GRBs) with time-dependent simulations for the proton-induced cascades. This method can generate self-consistent photon, neutrino and escaped neutron spectra. To obtain the integrated background spectra, we take into account the distributions of the burst luminosity and pulse duration timescale. A benchmark case with standard GRB luminosity function, a bulk Lorentz factor $Γ=300$ and a proton to gamma-ray luminosity fraction $f_{\rm p}=10$, is consistent with both the neutrino upper-limits and the observed UHECR intensity at $\sim 10^{20}$ eV, while requiring a different type of UHECR source at the ankle. For the benchmark case the GRBs in the bright end of the luminosity function, which contribute most of the neutrinos, have their photon spectrum substantially distorted by secondary photons. Such bright GRBs are few in number, and reducing their $f_p$ eliminates the distortion, while reducing the neutrino production. Even if we neglect the contribution of the brightest GRBs, the UHECR production rate at GZK energies is almost unchanged. These nominal GRB models, especially with $L_{\rm iso} \lesssim 10^{53} ~\mbox{erg} ~\mbox{s}^{-1}$, appear to meet the current constraints as far as being candidate UHECR sources above the ankle energy.
description: 13 pages, 4 figures, accepted for publication in ApJ