bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pinturas Rupestres: matérias-primas, técnicas e gestão do território Hugo Gomes, Pierluigi Rosina, Andrea Martins, Luiz Oosterbeek
Authors: Gomes Hugo , Rosina Pierluigi , Martins Andrea , Oosterbeek Luiz 
Published: December 2018

Um dos aspetos mais interessantes nos variados estudos dos pigmentos utilizados para a realização de pinturas rupestres é a selecção e manipulação das matérias-primas. Para estes estudos têm que ser considerados os aspetos geológicos, relacionados com a disponibilidade de matérias-primas; os aspetos culturais, resultantes das diferentes tradições adotadas e finalmente, os aspetos relacionados com a conservação, ou seja, a possibilidade de encontrar somente parte dos pigmentos originalmente utilizados (p.ex: os componentes inorgânicos).
No projecto RupScience (PTDC/HIS-ARQ/101299/2008) - "Análise das cadeias operatórias, arqueometria e cronologia das pinturas de Arte Rupestre" o foco da investigação é a identificação de eventuais inovações tecnológicas, essencial para o desenvolvimento de estratégias de adaptação das sociedades humanas, nomeadamente a determinação das matérias-primas que foram utilizadas nos pigmentos e das alterações que sofreram, questionando também sobre o seu estado de conservação.
Nas análises realizadas nos vários ambientes (Península Ibérica e África: Etiópia, Angola) pode-se verificar que existem alguns elementos que são recorrentes (óxidos de ferro, sobretudo a hematite) e outros que são específicos de áreas geográficas particulares.
DESKRIPSI TEORITIS, KERANGKA BERPIKIR DAN HIPOTESIS PENELITIAN
Authors: Kahar Abdul 
Published: December 2018

This study discusses theoretical descriptions, frameworks and research hypotheses. Communicative learning techniques are ways of delivering messages or information to targets that can be delivered through various methods that are assisted by several media in the form of images, Ohv, television and other media in accordance with the message conveyed and goals what you want to achieve. In this study two types of communicative learning will be discussed, namely simulation and recitation. Simulation is a form of play performed by participants to solve one form of problem, in accordance with established rules, and practice carrying out tasks that will be faced in everyday life. Recitation (recitation) can be equated with the method of giving assignments, the method of assigning assignments is one way of teaching that is characterized or characterized by the existence of problems or problems that are given by the teacher to be completed or mastered within the period agreed upon between teachers and students.Keywords: Theoretical Description, Simulation, Recitation Studi ini membahas tentang deskripsi teoritis, kerangka berpikir dan hipotesis penelitian.Teknik pembelajaran komunikatif adalah cara penyampaian pesan atau informasi kepada sasaran yang dapat disampaikan melaluiberbagai metode yang dibantu oleh beberapa media berupa gambar, Ohv, televisi dan media lainnya sesuai dengan pesan yang disampaikan dan tujuan yang ingin dicapai. Dalam penelitian ini akan dibahas dua macam pembelajaran komunikatif yaitu simulasi dan resitasi. Simulasi merupakan bentuk permainan yang dilakukan peserta untuk memecahkan salah satu bentuk permasalahan, sesuai dengan aturan yang telah ditetapkan, dan berlatih melaksanakan tugas-tugas yang akan dihadapi dalam kehidupan sehari-hari. Resitasi (recitation) dapat disamakan dengan metode pemberian tugas, metode pemberian tugas adalah salah satu cara mengajar yang dicirikan atau ditandai oleh adanya persoalan atau problematika yang diberikan oleh guru untuk diselesailcan atau dikuasai dalam jangka waktu yang telah disepakati bersama antaru guru dan siswa.Kata Kunci: Deskripsi Teoritis, Simulasi, Resitasi
THE EFFECT OF REPEATED READING STRATEGY IN TEACHING READING COMPREHENSION OF NARRATIVE TEXT AT THE EIGHT GRADE STUDENTSOF SMPN 36 PEKANBARU
Authors: Kasriyati Destina , Maharani Maharani 
Published: December 2018

Based on the result of observation that students got some difficulties to understand the content of reading comprehension, particularly main ideas, detail information, vocabulary, identify information, word reference and generic structure. The purpose of this research was to find whether the students who received in class experiment of repeated reading strategy had different skill in reading comprehension than students who did not receive treatment of the strategy at the second grade of SMPN 36 Pekanbaru. The design of this research was Experimental Research. This research was conducted on Jan 2018. The population of this research was the second grade of SMPN 36 Pekanbaru. The sample of this research were 2 classes as control and experiment class. Based on the test result, it was found that the average score of post-test was 85.33 and pre test was 71. It means that the result of post test was getting higher than pretest. In conclusion, the use of repeated reading strategy could increase students reading comprehension in narrative text. There was different ability between experment and control class.
EL DIALOGO ABRE FRONTERAS: LA EXPERIENCIA DE LOS JÓVENES DE LAS COMUNIDADES ÁRABE Y JUDÍA EN CHILE.
Authors: Agar Corbinos Lorenzo 
Published: December 2018

Chile ha sido elegido como destino migratorio por diversos grupos humanos. Entre ellos, un importante número de inmigrantes árabes y judíos, cuyos descendientes forman hoy parte activa de la sociedad chilena. El aporte cultural de los inmigrantes y descendientes ha impactado positivamente en el desarrollo del país. Este artículo presenta una experiencia pionera de diálogo entre jóvenes descendientes que integran la comunidad árabe y judía en Chile. En el contexto de una sociedad cada vez más multicultural, se hace relevante revisar las interacciones entre grupos de distinto origen. El objetivo de esta iniciativa de diálogo entre jóvenes de ambas comunidades, ha sido generar una instancia comunicacional, como una primera experiencia en la formación de una sociedad más abierta, integradora y respetuosa de la diversidad. Ambas comunidades, más allá de sus diferencias, tienen historias de vida comunes que permiten dar ejemplos de convivencia y diálogo. Un punto esencial en la metodología ha sido la de reforzar la mirada cultural por sobre la ideológica. Estamos convencidos que dar a conocer y promover este tipo de experiencias, ayudará al reconocimiento de la necesidad del diálogo intercultural con miras a aumentar los grados de cohesión social y respeto por los derechos de todos los grupos humanos.
ENCUENTROS, NARRATIVAS Y EXPERIENCIAS CON JÓVENES DESVINCULADOS DEL CONFLICTO ARMADO COLOMBIANO.
Authors: Marín Aponte Lucas 
Published: December 2018

El presente texto nos aproxima a la compresión de experiencias y desafíos que viven los jóvenes desvinculados de diferentes grupos armados, luego de egresar de los programas de atención a víctimas, en su proceso de reintegración a la vida civil. A través de diversos encuentros, se propiciaron espacios de diálogos que permitieron conocer sus testimonios, con el objetivo de implementar estrategias pedagógicas para atender estas poblaciones, y ahondar en nuestra realidad nacional. El reclutamiento forzado de menores, es un fenómeno social de impacto internacional que ha motivado múltiples estudios en especial desde las ciencias sociales, este fenómeno se presenta con mayor frecuencia en zonas rurales marginadas por el Estado, dominadas por estados paralelos o repúblicas independientes, dedicadas a actividades ilícitas. Hemos visto la necesidad de promover la creación de redes de apoyo institucionales y comunitarias que fortalezcan dichos procesos de reinserción ante un eventual acuerdo de paz en Colombia.
PAZ, JUSTICIA Y POSCONFLICTO: UNA APROXIMACIÓN DESDE LOS DISCURSOS DE FAMILIAS VÍCTIMAS DEL DESPLAZAMIENTO FORZADO ASENTADAS EN SOACHA CUNDINAMARCA.
Authors: Chávez Plazas Yuri Alicia , Hernández Hernández José Luis , Rangel Mario Alberto 
Published: December 2018

La paz y la justicia en un posible escenario de posconflicto en el país, ha sido un tema ampliamente debatido por académicos y politólogos, sin embargo es necesario aproximarse a los discursos que las víctimas del conflicto armado construyen desde sus daños y esperanzas. El artículo reflexiona en torno a las expresiones que diez familias víctimas del desplazamiento forzado asentadas en Soacha, construyen desde su dramática experiencia en la guerra y sus precariedades socioeconómicas en el municipio. Sin duda todos anhelan la paz, pero con justicia reparativa. La reflexión es el resultado de la investigación realizada por la Universidad Colegio Mayor de Cundinamarca, programa de Trabajo Social, en 2014, que indagó las representaciones sociales que de su condición de víctimas estas familias construyen en el marco de la Ley 1448. Aquí la justicia y la paz, surgieron como categorías emergentes, el diseño fue de corte cualitativo.
LA PAZ TERRITORIAL EN LOS MONTES DE MARÍA: RETOS Y DESAFÍOS PARA SU CONSTRUCCIÓN.
Authors: Daniels Puello Amaranto 
Published: December 2018

La sociedad colombiana y la comunidad internacional se encuentran a la expectativa con los resultados de los diálogos entre el gobierno nacional y las Farc, que conduzcan a la terminación del conflicto armado en nuestro país. Este proceso se desarrolla en medio de un contexto político y social polarizado sobre la duración y viabilidad del mismo, una coyuntura económica marcada por la desaceleración de la actividad productiva nacional e internacional y una severa crisis institucional ante los recurrentes escándalos sobre corrupción pública-privada. Este artículo adelanta una reflexión sobre la puesta en marcha de los acuerdos que se suscriban entre las partes, específicamente la llamada paz territorial, su conceptualización, la identificación de los retos y desafíos que su desarrollo implica en aspectos como el modelo de convivencia a construir, las políticas públicas a desplegar, el rol de las organizaciones sociales, y los cambios en la arquitectura institucional que demanda esa apuesta hacia el postconflicto.
LECCIONES PARA EL POSCONFLICTO: ¿POR QUÉ EL FIN DEL CONFLICTO ARMADO EN MARÍA LA BAJA, BOLÍVAR (2006-2014) NO PUSO FIN DE LA VIOLENCIA?
Authors: Osorio Bonacera Emy 
Published: December 2018

Este artículo presenta unas reflexiones interpretativas sobre las causas que determinaron que la violencia continuara en María la Baja, Bolívar. Para ello trabaja con datos obtenidos a través de revisión bibliográfica y hemerográfica, además de recolección de testimonio de los lugareños. En ese sentido, la intención de este trabajo es aproximar a explicaciones desde lo académico que permitan entender las causas del conflicto en María la Baja, y cómo el país, en el marco de negociaciones para la paz en aras del fin del conflicto armado, puede aprender de ello.
JUSTICIA TRANSICIONAL DERECHO A LA VERDAD COMO CONSTRUCCIÓN DE FUTUROS
Authors: Echeverría Aura María 
Published: December 2018

El presente artículo hace parte del proyecto de investigación que tiene como objeto determinar la eficacia de las leyes que establecen la justicia transicional en Colombia, particularmente en algunos casos ocurridos en el departamento de Bolívar entre los años 1999 y 2001. Y dentro de los objetivos específicos del trabajo se propone conocer cada uno de los derechos correlacionales a la justicia transicional: verdad, justicia y reparación.
En particular, el presente artículo es un avance del citado proyecto de investigación gira en torno a plantear que el conocer la verdad, vista ésta como construcción de la memoria histórica, puede facilitar los procesos de conciencia, colectividad, la sensibilización y el apoyo, hacia las víctimas y así la posibilidad de la reconciliación y de la construcción de paz en Colombia. El texto propone la siguiente estructura: i) definir lo que en el presente trabajo se debe entender como verdad, ya que es un concepto con varias acepciones y significados, ii) establecer como se relaciona la divulgación de esa memoria histórica con la construcción de futuro y transformación del conflicto en un contexto de complejidad creciente; iii) Posteriormente, plantear como se puede convertir esta en la base de un proceso de transformación del conflicto.
Thermophysical Modeling of Asteroid Surfaces Using Ellipsoid Shape Models
Authors: MacLennan Eric M. , Emery Joshua P. 
Published: December 2018

Abstract
Thermophysical Models (TPMs), which have proven to be a powerful tool in the interpretation of the infrared emission of asteroid surfaces, typically make use of shape models and spin axes obtained a priori for use as input boundary conditions. We test and then employ a TPM approach—under an assumption of an ellipsoidal shape—that exploits the combination of thermal multi-wavelength observations obtained at pre- and post-opposition. Thermal infrared data, when available at these observing circumstances, are inherently advantageous in constraining thermal inertia and sense of spin, among other physical traits. We show that, despite the lack of a priori knowledge mentioned above, the size, albedo, and thermal inertia of an object are well-constrained with precision comparable to that of previous techniques. Useful estimates of the surface roughness, shape, and spin direction can also be made, to varying degrees of success. Applying the method to Wide-Field infrared Survey Explorer observations, we present best-fit size, albedo, thermal inertia, surface roughness, shape elongation and sense of spin direction for 21 asteroids. We explore the thermal inertia’s correlation with asteroid diameter, after accounting for its dependence on the heliocentric distance.
Re-analyzing the Dynamical Stability of the HD 47366 Planetary System
Authors: Marshall J. P. , Wittenmyer R. A. , Horner J. , Clark J. , Mengel M. W. , Hinse T. C. , Agnew M. T. , Kane S. R. 
Published: December 2018

Abstract
Multi-planet systems around evolved stars are of interest to trace the evolution of planetary systems into the post-main-sequence phase. HD 47366, an evolved intermediate-mass star, hosts two giant planets on moderately eccentric orbits. Previous analysis of the planetary system has revealed that it is dynamically unstable on timescales much shorter than the stellar age unless the planets are trapped in mutual 2:1 mean-motion resonance, inconsistent with the orbital solution presented in Sato et al., or are moving on mutually retrograde orbits. Here we examine the orbital stability of the system presented in S16 using the n-body code Mercury over a broad range of a–e parameter space consistent with the observed radial velocities, assuming they are on co-planar orbits. Our analysis confirms that the system as proposed in S16 is not dynamically stable. We therefore undertake a thorough reanalysis of the available observational data for the HD 47366 system, through the Levenberg–Marquardt technique and confirmed by MCMC Bayesian methodology. Our reanalysis reveals an alternative, lower-eccentricity fit that is vastly preferred over the highly eccentric orbital solution obtained from the nominal best-fit presented in S16. The new, improved dynamical simulation solution reveals the reduced eccentricity of the planetary orbits, shifting the HD 47366 system into the edge of a broad stability region, increasing our confidence that the planets are all that they seem to be. Our rigorous examination of the dynamical stability of HD 47366 stands as a cautionary tale in finding the global best-fit model.
Low-latitude Aurorae during the Extreme Space Weather Events in 1859
Authors: Hayakawa Hisashi , Ebihara Yusuke , Hand David P. , Hayakawa Satoshi , Kumar Sandeep , Mukherjee Shyamoli , Veenadhari B. 
Published: December 2018

Abstract
The Carrington storm (1859 September 1/2) is one of the largest magnetic storms ever observed, and it caused global auroral displays in low-latitude areas, together with a series of multiple magnetic storms from 1859 August 28 to September 4. In this study, we revisit contemporary auroral observation records to extract information on their elevation angle, color, and direction to investigate this stormy interval in detail. We first examine the equatorward boundary of the “auroral emission with multiple colors” based on descriptions of elevation angle and color. We find that their locations were 36.°5 ILAT on August 28/29 and 32.°7 ILAT on September 1/2, suggesting that trapped electrons moved to, at least, L ∼ 1.55 and L ∼ 1.41, respectively. The equatorward boundary of “purely red emission” was likely located at 30.°8 ILAT on September 1/2. If the “purely red emission” was a stable auroral red arc, it would suggest that trapped protons moved to, at least, L ∼ 1.36. This reconstruction with observed auroral emission regions provides conservative estimations of magnetic storm intensities. We compare the auroral records with magnetic observations. We confirm that multiple magnetic storms occurred during this stormy interval, and that the equatorward expansion of the auroral oval is consistent with the timing of magnetic disturbances. It is possible that the August 28/29 interplanetary coronal mass ejections (ICMEs) cleared out the interplanetary medium, making the ICME for the Carrington storm on September 1/2 more geoeffective.
The Carnegie Supernova Project: Absolute Calibration and the Hubble Constant
Authors: Burns Christopher R. , Parent Emilie , Phillips M. M. , Stritzinger Maximilian , Krisciunas Kevin , Suntzeff Nicholas B. , Hsiao Eric Y. , Contreras Carlos , Anais Jorge , Boldt Luis , Busta Luis , Campillay Abdo , Castellón Sergio , Folatelli Gastón , Freedman Wendy L. , González Consuelo , Hamuy Mario , Heoflich Peter , Krzeminski Wojtek , Madore Barry F. , Morrell Nidia , Persson S. E. , Roth Miguel , Salgado Francisco , Serón Jacqueline , Torres Simón 
Published: December 2018

Abstract
We present an analysis of the final data release of the Carnegie Supernova Project I, focusing on the absolute calibration of the luminosity–decline rate relation for Type Ia supernovae (SNe Ia) using new intrinsic color relations with respect to the color-stretch parameter, s

BV
, enabling improved dust extinction corrections. We investigate to what degree the so-called fast-declining SNe Ia can be used to determine accurate extragalactic distances. We estimate the intrinsic scatter in the luminosity–decline rate relation and find it ranges from ±0.13 mag to ±0.18 mag with no obvious dependence on wavelength. Using the Cepheid variable star data from the SH0ES project, the SN Ia distance scale is calibrated and the Hubble constant is estimated using our optical and near-infrared sample, and these results are compared to those determined exclusively from a near-infrared subsample. The systematic effect of the supernova’s host galaxy mass is investigated as a function of wavelength and is found to decrease toward redder wavelengths, suggesting this effect may be due to dust properties of the host. Using estimates of the dust extinction derived from optical and near-infrared wavelengths and applying these to the H band, we derive a Hubble constant

, whereas using a simple B − V color correction applied to the B band yields

. Photometry of two calibrating SNe Ia from the CSP-II sample, SN 2012ht and SN 2015F, is presented and used to improve the calibration of the SN Ia distance ladder.
Deuterium Fractionation Survey Toward Protostellar Sources in the Perseus Molecular Cloud: HNC Case
Authors: Imai Muneaki , Sakai Nami , López-Sepulcre Ana , Higuchi Aya E. , Zhang Yichen , Oya Yoko , Watanabe Yoshimasa , Sakai Takeshi , Ceccarelli Cecilia , Lefloch Bertrand , Yamamoto Satoshi 
Published: December 2018

Abstract
A survey observation of the DNC (J = 1−0 and J = 3−2) and HN13C (J = 1−0 and J = 3−2) emission toward 34 Class 0 and I protostellar sources in the Perseus molecular cloud has been conducted with the NRO 45 m and IRAM 30 m telescopes to explore how the deuterium ratio of the neutral species changes after the birth of a protostar. We have detected the J = 1−0 and J = 3−2 lines of DNC toward 32 sources and the J = 1−0 and J = 3−2 lines of HN13C toward 31 and 26 sources, respectively. A mean deuterium ratio of HNC, which is defined as R
D(HNC) = N(DNC)/N(HNC), is found to be 0.049–0.056. We compare R
D(HNC) with physical parameters of the sources, and find a negative correlation between R
D(HNC) and the bolometric temperature. This result suggests that R
D(HNC) decreases as a protostar evolves. Compared with the deuterium ratio of the molecular ion

, R
D(HNC) seems to decrease slowly with the protostellar evolution.
New Insights into the Galactic Chemical Evolution of Magnesium and Silicon Isotopes from Studies of Silicate Stardust
Authors: Hoppe Peter , Leitner Jan , Kodolányi János 
Published: December 2018

Abstract
We report high-resolution (<100 nm) Mg and Si isotope data of 12 presolar silicate grains (230–440 nm) from red giant and/or asymptotic giant branch stars that were previously identified based on their anomalous O-isotopic compositions (11 Group 1 grains and one Group 2 grain) in five primitive meteorites. The data were acquired by NanoSIMS ion imaging with the new Hyperion ion source that permits Mg and Si isotope measurements of presolar silicates with higher precision than was possible before. For a subset of five Group 1 (“category A”) grains, 25Mg/24Mg and 29Si/28Si ratios correlate with the inferred initial 18O/16O ratios of their parent stars, a measure of stellar metallicity. The Mg and Si isotope data of category A grains show positive correlations in the δ
25Mg–δ
26Mg, δ
29Si–δ
30Si, and δ
25Mg–δ
29Si spaces. The correlations between O-, Mg, and Si-isotopic compositions are best explained by Galactic chemical evolution (GCE), with only minor imprints of nucleosynthetic and mixing processes in the grains’ parent stars. Six Group 1 silicate (“category B”) grains have close-to-normal Mg and Si isotopic compositions, possibly the result of isotope exchange in interstellar space or the meteorite parent bodies. For Si in category A grains, we find, with ∼2σ significance, a slightly shallower slope in the δ
29Si–δ
30Si space for the GCE than inferred from presolar SiC mainstream grains. The 2σ upper limit on the slope for the linear trend in the δ
25Mg–δ
26Mg space of category A grains is slightly lower than the slope-1 predicted by GCE models around solar metallicity.
Climate Modeling of a Potential ExoVenus
Authors: Kane Stephen R. , Ceja Alma Y. , Way Michael J. , Quintana Elisa V. 
Published: December 2018

Abstract
The planetary mass and radius sensitivity of exoplanet discovery capabilities has reached into the terrestrial regime. The focus of such investigations is to search within the Habitable Zone where a modern Earth-like atmosphere may be a viable comparison. However, the detection bias of the transit and radial velocity methods lies close to the host star where the received flux at the planet may push the atmosphere into a runaway greenhouse state. One such exoplanet discovery, Kepler-1649b, receives a similar flux from its star as modern Venus does from the Sun, and so was categorized as a possible exoVenus. Here we discuss the planetary parameters of Kepler-1649b in relation to Venus to establish its potential as a Venus analog. We utilize the general circulation model ROCKE-3D to simulate the evolution of the surface temperature of Kepler-1649b under various assumptions, including relative atmospheric abundances. We show that in all our simulations the atmospheric model rapidly diverges from temperate surface conditions toward a runaway greenhouse with rapidly escalating surface temperatures. We calculate transmission spectra for the evolved atmosphere and discuss these spectra within the context of the James Webb Space Telescope Near-Infrared Spectrograph capabilities. We thus demonstrate the detectability of the key atmospheric signatures of possible runaway greenhouse transition states and outline the future prospects of characterizing potential Venus analogs.