bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Universal Transition in Atmospheric Diffusion for Hot Subdwarfs Near 18,000 K∗
Authors: Brown T. M. , Taylor J. M. , Cassisi S. , Sweigart A. V. , Bellini A. , Bedin L. R. , Salaris M. , Renzini A. , Dalessandro E. 
Published: December 2017

Abstract
In the color–magnitude diagrams of globular clusters, when the locus of stars on the horizontal branch extends to hot temperatures, discontinuities are observed at colors corresponding to ∼12,000 and ∼18,000 K. The former is the “Grundahl jump” that is associated with the onset of radiative levitation in the atmospheres of hot subdwarfs. The latter is the “Momany jump” that has remained unexplained. Using the Space Telescope Imaging Spectrograph on the Hubble Space Telescope, we have obtained ultraviolet and blue spectroscopy of six hot subdwarfs straddling the Momany jump in the massive globular cluster ω Cen. By comparison to model atmospheres and synthetic spectra, we find that the feature is due primarily to a decrease in atmospheric Fe for stars hotter than the feature, amplified by the temperature dependence of the Fe absorption at these effective temperatures.
Theory and Transport of Nearly Incompressible Magnetohydrodynamics Turbulence. III. Evolution of Power Anistropy in Magnetic Field Fluctuations throughout the Heliosphere
Authors: Adhikari L. , Zank G. P. , Telloni D. , Hunana P. , Bruno R. , Shiota D. 
Published: December 2017

Abstract
A theoretical model that describes the evolution of the power anisotropy in the energy-containing and inertial ranges throughout the heliosphere is developed for three possibilities: (i) no in situ sources of turbulence; (ii) stream-shear sources of 2D and slab turbulence; and (iii) a fully driven turbulence model that includes both stream-shear driving and a pickup ion source of slab turbulence. At the inner boundary (1 au), we assume that the ratios of the 2D to slab fluctuating magnetic energy variances in the energy-containing range are 80:20, 70:30, 60:40, and 55:45. For case (i),

in the energy-containing range increases monotonically throughout the heliosphere, whereas the inertial range ratio increases until ∼20 au and then decreases. For case (ii), the energy-containing range ratio increases initially and then remains approximately constant and ordered beyond ∼2 au, according to the inner boundary assumptions. The inertial range ratio for the 80:20 case increases with heliocentric distance, whereas for the 70:30, 60:40, and 55:45 cases, the rations increase between ∼2 to ∼10–20 au, and then generally decrease at larger heliocentric distances. For case (iii), the energy-containing and inertial range ratios increase initially, remain approximately constant and increase slightly, respectively, and then decrease more rapidly between ∼8 and 30 au, and more gradually thereafter, approaching a ratio of ∼1 at 75 au. We present preliminary results that show the power anisotropy in magnetic field fluctuations observed by Ulysses spacecraft increasing with heliocentric distance from ∼1.5 to 4.5 au.
Long-term Photometric Variability in Kepler Full-frame Images: Magnetic Cycles of Sun–like Stars
Authors: Montet Benjamin T. , Tovar Guadalupe , Foreman-Mackey Daniel 
Published: December 2017

Abstract
Photometry from the Kepler mission is optimized to detect small, short-duration signals like planet transits at the expense of long-term trends. This long-term variability can be recovered in photometry from the full-frame images (FFIs), a set of calibration data collected approximately monthly during the Kepler mission. Here we present f3, an open-source package to perform photometry on the Kepler FFIs in order to detect changes in the brightness of stars in the Kepler field of view over long time baselines. We apply this package to a sample of 4000 Sun–like stars with measured rotation periods. We find that ≈10% of these targets have long-term variability in their observed flux. For the majority of targets, we find that the luminosity variations are either correlated or anticorrelated with the short-term variability due to starspots on the stellar surface. We find a transition between anticorrelated (starspot-dominated) variability and correlated (facula-dominated) variability between rotation periods of 15 and 25 days, suggesting the transition between the two modes is complete for stars at the age of the Sun. We also identify a sample of stars with apparently complete cycles, as well as a collection of short-period binaries with extreme photometric variation over the Kepler mission.
The Power of SOFIA/FORCAST in Estimating Internal Luminosities of Low-mass Class 0/I Protostars
Authors: Huard Tracy L. , Terebey Susan 
Published: December 2017

Abstract
With the Stratospheric Observatory for Infrared Astronomy (SOFIA) routinely operating science flights, we demonstrate that observations with the Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST) can provide reliable estimates of the internal luminosities, L
int, of protostars. We have developed a technique to estimate L
int using a pair of FORCAST filters: one “short-wavelength” filter centered within 19.7–25.3 μm, and one “long-wavelength” filter within 31.5–37.1 μm. These L
int estimates are reliable to within 30%–40% for 67% of protostars and to within a factor of 2.3–2.6 for 99% of protostars. The filter pair comprised of F 25.3 μm and F 37.1 μm achieves the best sensitivity and most constrained results. We evaluate several assumptions that could lead to systematic uncertainties. The OH5 dust opacity matches observational constraints for protostellar environments best, although not perfectly; we find that any improved dust model will have a small impact of 5%–10% on the L
int estimates. For protostellar envelopes, the TSC84 model yields masses that are twice those of the Ulrich model, but we conclude that this mass difference does not significantly impact results at the mid-infrared wavelengths probed by FORCAST. Thus, FORCAST is a powerful instrument for luminosity studies targeting newly discovered protostars or suspected protostars lacking detections longward of 24 μm. Furthermore, with its dynamic range and greater angular resolution, FORCAST may be used to characterize protostars that were either saturated or merged with other sources in previous surveys using the Spitzer Space Telescope or the Herschel Space Observatory.
La thérapie familiale psychanalytique a-t-elle sa place dans le traitement du TDAH ?
Authors: Sourgen Jean-Louis 
Published: December 2017

Ce trouble du comportement semblait exclusivement lié à une particularité génétique entraînant un désordre métabolique au niveau des neurotransmetteurs. Cette approche s’accompagne généralement d’un traitement médicamenteux associé à des rééducations multiples. Le déroulement d’une TFP ouvre une autre perspective, montrant que le trouble de l’enfant peut être considéré comme le symptôme d’une souffrance dans le lien. Dans l’exemple décrit le lien mère-enfant est incestuel, ambivalent et marqué d’une emprise réciproque. La TFP, par le mouvement et l’élaboration des constructions défensives que permet le néogroupe, apparaît comme une des meilleures approches possibles, évitant de faire de l’enfant un malade ou de son environnement un coupable ; elle peut être associée à un traitement déjà mis en œuvre.
Comparison of Two Escapement Designs for Western Painted Turtles Captured in Modified Fyke Nets
Authors: Moos Tyrel S. , Blackwell Brian G. 
Published: December 2017

AbstractAltering sampling methods to reduce bycatch during fish population sampling can introduce biases that affect the capture of target species. Therefore, understanding bycatch reduction devices and how they affect fish sampling is important. Our goal was to test two potential escapement designs intended to reduce bycatch of western painted turtles Chrysemys picta bellii during freshwater-fish population assessments with modified fyke nets. Design A tested an escapement flap on the interior of the modified fyke net and design B tested an escapement throat on the exterior of the modified fyke net. We completed 4-h and 24-h trials for turtle escapement to determine the effectiveness of each design for reducing turtle bycatch. We also simulated fish population assessments to determine the escapement of fish and turtles from each design. Turtles escaped from each design with mean escapement rates during the 4-h and 24-h trials of 71.1% and 63.8% from design A and 55.6% and 50.0% from design B, respectively. In the fish population assessment simulation we observed a mean escapement rate of 49% for turtles from design A, but a mean escapement rate of only 11% from design B. Species-specific escapement rates were observed for fish in both designs. Significant differences in the size structure of some species were observed. Escapement rates from design A were likely underestimated for most species captured due to movement of fish and turtles from the holding pen back into the fyke net. Based on our results, we do not recommend either design to reduce bycatch of turtles during fish community sampling without substantial refinement of the designs. Further research is needed to identify alternative methods for reducing turtle bycatch mortality.
Development, Underdevelopment and Poverty: A Linguistic Study of Joseph Edoki's The African Dream
Authors: Omo-Ojugo Grace I. 
Published: December 2017

Historically, European countries: Britain, France, Germany, Portugal, among others, partitioned Africa at the Berlin Conference of 1884/1885. They colonized the continent for over a century before the countries gained independence, resulting from protest led by educated Africans who saw how their European colonialists exploited and bastardized the socio-cultural values of Africans. The exploitation of Africa was so obvious that a Guyanese activist, Rodney Walter, wrote a text entitled How Europe Underdeveloped Africa (1972) to historically situate its massiveness and set an agenda for Africa's future. However, after independence, the expectation of most African countries have been dashed because of corrupt leadership, selfishness and lack of a philosophical focus, unlike the Asian Tigers such as Malaysia, Indonesia, Indian and South Korea which had their independence almost at the same time with many African countries. It is not surprising, therefore, that several coup de' tats have occurred in many African countries after independence and unbridled corruption, ethnic jingoism and selfishness have mainly been responsible for the underdevelopment, poverty and misery on the African continent. This unfortunate state of affairs has provoked African writers, who have written novels, plays and poems, to expose the moral decadence and corruption in African countries, with a view to refocus the development agenda for the common good of Africans. Among such works is, Joseph Edoki's The African Dream, which is pre-occupied with corruption and abuse of office by political leaders in Nigeria in particular and Africa generally. Employing content analysis and historical approach, this article examines how Edoki's text utilizes linguistic features to describe and expose some of the social vices plaguing Africa. Keywords: Africa, Development, Poverty, Socio-cultural structure, Politician, African society
Repositorio de actividades para enseñar competencias transversales
Authors: Miró Joe , Jaume i Capó Antoni 
Published: December 2017

<p>Una competencia es genérica si no está directamente relacionada con los conocimientos de la carrera en la que se imparte, pero se considera importante para la educación del alumnado. Suelen recibir el nombre de competencias transversales porque no tienen una asignatura propia, sino que se adquieren a lo largo de las otras asignaturas. El problema principal es que desconocemos cómo enseñar estas competencias y cómo integrarlas en nuestra docencia. Una forma de resolver esta dificultad es con el esfuerzo colaborativo de todos los profesores: casi todos tenemos alguna experiencia o hemos trabajado alguna de estas competencias en clase.</p><p>Para facilitar la inclusión y evaluación de competencias transversales en la docencia, hemos creado un repositorio de actividades que pueden usarse en asignaturas concretas. Este repositorio permite que los profesores con más experiencia compartan con los menos experimentados las actividades que han creado para impartir comunicación oral y escrita, trabajo en equipo, uso de idiomas extranjeros, etc. Accediendo al repositorio cualquier profesor encontrará actividades concretas que se ajusten a su asignatura, método docente y circunstancias. Algunas las podrán utilizar directamente, otras requerirán pequeñas adaptaciones. Este repositorio permite que con poco esfuerzo cualquier profesor pueda introducir competencias transversales en su docencia. </p>
La Evaluación del Practicum de Pedagogía en el proceso de transición de la Licenciatura al Grado.
Authors: Pérez Herrero María del Henar , Burguera Condon Joaquín Lorenzo 
Published: December 2017

<p><em>En este artículo se presentan los resultados más relevantes de la evaluación realizada durante seis años académicos de diversos aspectos del Practicum de quinto curso, Practicum II de la Licenciatura de Pedagogía de la Universidad de Oviedo. Los datos obtenidos proceden fundamentalmente de la información obtenida de una muestra de 207 estudiantes de Practicum II de Pedagogía. La finalidad del estudio es contar con evidencias válidas y fiables sobre la experiencia en el Practicum de la licenciatura y recuperar esa experiencia para planificar el Practicum o las materias relacionadas con el Practicum del Grado de Pedagogía. Para ello, se han planteado los siguientes objetivos: 1) Conocer la valoración general de los estudiantes del Practicum de 5º curso de Pedagogía, 2) Obtener información de los estudiantes sobre diferentes aspectos del Practicum II: organización, apoyo de los tutores, utilidad de los talleres de reflexión, y coordinación centros-Facultad, etc. Los estudiantes han respondido a un cuestionario de ocho preguntas de respuesta abierta y un ítem en forma de escala de valoración, acerca de su experiencia en el Practicum. En el cuestionario se ha solicitado a los estudiantes que valoraran los aspectos organizativos, de gestión y coordinación, nivel adquirido en las competencias previstas, y que plantearan propuestas de mejora. En general, los resultados globales obtenidos de las valoraciones de los estudiantes se pueden considerar muy satisfactorios. La mayoría de los estudiantes, 68,59% valoran el Practicum con una puntuación alta o muy alta, un 20,77% le otorga una valoración media y sólo un 3,86% lo valoran con una puntuación baja y muy baja.</em></p><p> </p><p> </p>
La supervisión y la evaluación del practicum como elemento fundamental para la realización de buenas prácticas profesionales en alumnos de ciencias sociales
Authors: Arellano Sanchez Jose Refugio , Santoyo Rodríguez Margarita 
Published: December 2017

El presente trabajo está referido a la supervisión y evaluación que se aplica a los alumnos en una práctica de campo. Ya que es en una práctica supervisada correctamente donde los estudiantes pueden adquirir las herramientas necesarias para el trabajo cualitativo, disciplina académica para la planeación del trabajo en campo y las técnicas metodológicas para combinar los recursos cualitativos, los cuantitativos y documentales formando una investigación social más completa, que muestra un análisis a partir de distintos elementos que se deslizan constantemente entre lo abstracto y concreto. Si bien ya es un reto dar a conocer a alumnos de nivel licenciatura de la Facultad de Ciencias Políticas y Sociales de la UNAM, la metodología cualitativa de la investigación social, que poco se les instruye a lo largo de su formación universitaria; en este contexto, se vuelve aún más complejo supervisar y evaluar un trabajo en donde las reglas y pautas; tanto de comportamiento y de la dinámica cotidiana en el aula de enseñanza, se rompen entrelazándose con otros elementos, agregando que no se cuentan con elementos de evaluación “oficiales” capaces de dar a conocer el verdadero aprendizaje de los alumnos.
La tutoria en el prácticum.
Authors: Raposo Rivas Manuela 
Published: December 2017

<p>Autores: Parez Abellas, A.; Cid Sabucedo, A.; Sarmiento Campos, J.A. </p><p>ISBN: 978‐84‐8408‐184‐5 </p><p>Depósito Legal: C‐3933‐2010 </p><p>Editorial: Andavira </p><p>Año de edición: 2010 </p><p>Nº Edición: 1ª </p><p>Lugar edición: Santiago de Compostela </p><p>Nº páginas: 158 </p><p>Idioma: Español </p>
Newkey-Burden, Chas. The Wanted: a biografia não autorizada. Tradução de Mariana Varella. São Paulo: Prumo, 2013. 200 p
Authors: Costa Helder De lima 
Published: December 2017

THE WANTED The Unauthorized Biography, livro escrito pelo jornalista e biógrafo americano, Chas Newkey-Burden, e publicado em 2012. Esta obra não ficcional, que foi traduzida para o vernáculo por Mariana Varella e lançada pela Prumo em 2013, com o título de The Wanted: A Biografia Não Autorizada, descreve a trajetória de cinco jovens do Reino Unido que se juntaram em 2009 para formar uma banda juvenil de pop rock. Até hoje, The Wanted é considerada uma das boy bands que mais tempo permaneceu no show business.
Profiling of Saharan dust from the Caribbean to western Africa – Part 2: Shipborne lidar measurements versus forecasts
Authors: Ansmann Albert , Rittmeister Franziska , Engelmann Ronny , Basart Sara , Jorba Oriol , Spyrou Christos , Remy Samuel , Skupin Annett , Baars Holger , Seifert Patric , Senf Fabian , Kanitz Thomas 
Published: December 2017

Abstract. A unique 4-week ship cruise from Guadeloupe to Cabo Verde in April–May 2013 see part 1, Rittmeister et al. (2017) is used for an in-depth comparison of dust profiles observed with a polarization/Raman lidar aboard the German research vessel Meteor over the remote tropical Atlantic and respective dust forecasts of a regional (SKIRON) and two global atmospheric (dust) transport models (NMMB/BSC-Dust, MACC/CAMS). New options of model–observation comparisons are presented. We analyze how well the modeled fine dust (submicrometer particles) and coarse dust contributions to light extinction and mass concentration match respective lidar observations, and to what extent models, adjusted to aerosol optical thickness observations, are able to reproduce the observed layering and mixing of dust and non-dust (mostly marine) aerosol components over the remote tropical Atlantic. Based on the coherent set of dust profiles at well-defined distances from Africa (without any disturbance by anthropogenic aerosol sources over the ocean), we investigate how accurately the models handle dust removal at distances of 1500 km to more than 5000 km west of the Saharan dust source regions. It was found that (a) dust predictions are of acceptable quality for the first several days after dust emission up to 2000 km west of the African continent, (b) the removal of dust from the atmosphere is too strong for large transport paths in the global models, and (c) the simulated fine-to-coarse dust ratio (in terms of mass concentration and light extinction) is too high in the models compared to the observations. This deviation occurs initially close to the dust sources and then increases with distance from Africa and thus points to an overestimation of fine dust emission in the models.
Modelling Glaciers in the HARMONIE-AROME NWP model
Authors: Mottram Ruth , Nielsen Kristian Pagh , Gleeson Emily , Yang Xiaohua 
Published: December 2017

Abstract. HARMONIE-AROME is a convection-permitting non-hydrostatic model that includes the multi-purpose SURFEX surface model. It is developed for high resolution (1–3 km) weather forecasting and applied in a number of regions in Europe and the Mediterranean. A version of HARMONIE-AROME is also under development for regional climate modelling. Here we run HARMONIE-AROME for a domain over Greenland that includes a significant portion of the Greenland ice sheet. The model output reproduces temperature, wind speed and direction and relative humidity over the ice sheet well when compared with the observations from PROMICE automatic weather stations (AWS) operated within the model domain on the ice sheet (mean temperature bias 1.31 ± 3.6 K) but we identified a much lower bias (−0.16 ± 2.3 K) at PROMICE sites on days where melt does not occur at the ice sheet surface and is thus an artefact of the simplified surface scheme over glaciers in the existing HARMONIE-AROME operational set-up. The bias in summer time temperature also affects wind speed and direction as the dominant katabatic winds are caused by the cold ice surface and slope gradient. By setting an upper threshold to the surface temperature of the ice surface within SURFEX we show that the weather forecast error over the Greenland ice sheet can be reduced in summer when glacier ice is exposed. This improvement will facilitate accurate ice melt and run-off computations, important both for ice surface mass budget estimation and for commercial applications such as hydro-power forecasting. Furthermore, the HCLIM regional climate model derived from HARMONIE-AROME will need to accurately account for glacier surface processes in these regions in order to be used to accurately compute the surface mass budget of ice sheets and glaciers, a key goal of regional climate modelling studies in Greenland.
A data model of the Climate and Forecast metadata conventions (CF-1.6) with a software implementation (cf-python v2.1)
Authors: Hassell David , Gregory Jonathan , Blower Jon , Lawrence Bryan N. , Taylor Karl E. 
Published: December 2017

Abstract. The CF (Climate and Forecast) metadata conventions are designed to promote the creation, processing, and sharing of climate and forecasting data using Network Common Data Form (netCDF) files and libraries. The CF conventions provide a description of the physical meaning of data and of their spatial and temporal properties, but they depend on the netCDF file encoding which can currently only be fully understood and interpreted by someone familiar with the rules and relationships specified in the conventions documentation. To aid in development of CF-compliant software and to capture with a minimal set of elements all of the information contained in the CF conventions, we propose a formal data model for CF which is independent of netCDF and describes all possible CF-compliant data. Because such data will often be analysed and visualised using software based on other data models, we compare our CF data model with the ISO 19123 coverage model, the Open Geospatial Consortium CF netCDF standard, and the Unidata Common Data Model. To demonstrate that this CF data model can in fact be implemented, we present cf-python, a Python software library that conforms to the model and can manipulate any CF-compliant dataset.
Marcas de universidades brasileiras no Instagram: o discurso e a identidade do estudante
Authors: Freitas Cardoso João Batista , Santana Jefferson De Azevedo 
Published: December 2017

O artigo tem o objetivo de discutir como, no Brasil, os estudantes utilizam a imagem da marca das instituições, por meio do Instagram, criando e promovendo valores para a própria identidade. Foi realizada análise documental das publicações de estudantes de duas Instituições de Ensino Superior, Universidade Anhembi Morumbi e Universidade Presbiteriana Mackenzie. O levantamento das publicações dos estudantes com as marcas de instituições de Ensino Superior foi feito de forma qualitativa por meio de hashtags no site IconosQuare. Como resultado, foi verificado que, nas publicações, os estudantes se apropriam de diversos elementos da marca, como logo, cor, uniforme e fachada. Também foi comprovado que os estudantes se apropriam dos valores simbólicos da marca utilizando-se ou não do discurso da instituição.