bluuebunny/crossref_metadata_2025_split huggingface dataset:
Towards a Black Feminist Model of Black Atlantic Liberation: Remembering Beatriz Nascimento
Authors: Smith Christen Anne 
Published: March 2017

Abstract
Black woman, scholar, and visionary—Beatriz Nascimento was a critical figure in Brazil's Black Movement until her untimely death in 1995. Although she published only a handful of articles before she died and left only a few other recorded thoughts, her ideas about the symbolic relationship between quilombos (Afro-Brazilian maroon societies) and black subjectivity encourage us to re-imagine the meaning of Black liberation from a transnational, Black feminist perspective. This essay reflects on her life and intellectual contributions, making the argument that Nascimento should be considered a key figure in the radical Black tradition in the Americas. Not only did her ground-breaking theorizations of the Black Atlantic re-imagine this important concept from a radical, Black, female, Latin American perspective, but the general lack of knowledge of her theoretical contributions in contemporary theoretical debates in African Diaspora and Latin American Studies underscores the need to deemphasize the United States and English-speaking experiences in our discussions of global Black intellectual traditions, while simultaneously foregrounding black women's contributions to Latin American philosophical and political thought.
A chemical landscape transformed: Bitterfeld, Germany since 1980
Authors: Chaney Sandra 
Published: March 2017

Abstract
The essay uses the transformation of the chemical landscape of Bitterfeld, Germany, since the 1980s to explore successes and limitations of two state-driven modernisation projects - one socialist and centrally planned, the other liberal democratic and market-based - both expressing optimistic visions of using technology and industry to harness nature's productive potential and build a healthier, more prosperous, society. Under the East German socialist regime the chemical industry that had developed over a century lost its technological momentum because the state was forced to rely on brown coal that was technologically outdated and ecologically and economically unsustainable. After rapid unification, Germany scaled back and modernised Bitterfeld's chemical industry and stopped the mining of brown coal. Within two decades, the toxic chemical landscape was bought, sold and engineered into an ecologically and economically healthier condition, although unemployment increased temporarily and out-migration continues to be a concern. Over the last two decades an envirotechnical landscape has emerged in which chemical manufacturing is natural and the surrounding nature is highly engineered. The most recent chapter in Bitterfeld's story reveals a new modernisation project that aims to make the area ecologically healthy and economically competitive in the global market, an undertaking requiring extensive economic investment and environmental engineering.
Nature of the Diffuse Source and Its Central Point-like Source in SNR 0509–67.5
Authors: Litke Katrina C. , Chu You-Hua , Holmes Abigail , Santucci Robert , Blindauer Terrence , Gruendl Robert A. , Li Chuan-Jui , Pan Kuo-Chuan , Ricker Paul M. , Weisz Daniel R. 
Published: March 2017

Abstract
We examine a diffuse emission region near the center of SNR 0509−67.5 to determine its nature. Within this diffuse region we observe a point-like source that is bright in the near-IR, but is not visible in the B and V bands. We consider an emission line observed at 6766 Å and the possibilities that it is Lyα, Hα, and [O ii] λ3727. We examine the spectral energy distribution (SED) of the source, comprised of Hubble Space Telescope B, V, I, J, and H bands in addition to Spitzer/IRAC 3.6, 4.5, 5.8, and 8 μm bands. The peak of the SED is consistent with a background galaxy at z ≈ 0.8 ± 0.2 and a possible Balmer jump places the galaxy at z ≈ 0.9 ± 0.3. These SED considerations support the emission line’s identification as [O ii] λ3727. We conclude that the diffuse source in SNR 0509−67.5 is a background galaxy at z ≈ 0.82. Furthermore, we identify the point-like source superposed near the center of the galaxy as its central bulge. Finally, we find no evidence for a surviving companion star, indicating a double-degenerate origin for SNR 0509−67.5.
A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like
Emission
Authors: Liu Wen-Juan , Qian Lei , Dong Xiao-Bo , Jiang Ning , Lira Paulina , Cai Zheng , Wang Feige , Yang Jinyi , Xiao Ting , Kim Minjin 
Published: March 2017

Abstract
We report the discovery of a 20 kpc sized

emission in SDSS J083803.68+540642.0, a ringed dwarf galaxy (

mag) hosting an accreting intermediate-mass black hole at z = 0.02957. Analysis of the Hubble Space Telescope images indicates that it is an early-type galaxy with a featureless low-surface brightness disk (

mag arcsec−2 in the V band) and a prominent, relatively red bulge (V − I = 2.03,

or 0.″48) that accounts for ≈81% of the total light in the I band. A circumgalactic ring of a diameter 16 kpc is also detected, with a disperse shape on its south side. The optical emission lines reveal the nucleus to be a broad-line LINER. Our MMT longslit observation indicates that the kinematics of the extended

emission is consistent with a rotational gaseous disk, with a mean blueshifted velocity of 162

and mean redshifted velocity of 86

. According to our photoionization calculations, the large-scale

emission is unlikely to be powered by the central nucleus or by hot evolved (post-AGB) stars interspersed in the old stellar populations, but by in situ star formation; this is vindicated by the line-ratio diagnostic of the extended emission. We propose that both the ring and large-scale

-emitting gas are created by the tidal accretion in a collision—and then merger—with a gas-rich galaxy of a comparable mass.
Self-consistent Modeling of Reionization in Cosmological Hydrodynamical Simulations
Authors: Oñorbe Jose , Hennawi Joseph F. , Lukić Zarija 
Published: March 2017

Abstract
The ultraviolet background (UVB) emitted by quasars and galaxies governs the ionization and thermal state of the intergalactic medium (IGM), regulates the formation of high-redshift galaxies, and is thus a key quantity for modeling cosmic reionization. The vast majority of cosmological hydrodynamical simulations implement the UVB via a set of spatially uniform photoionization and photoheating rates derived from UVB synthesis models. We show that simulations using canonical UVB rates reionize and, perhaps more importantly, spuriously heat the IGM, much earlier (

) than they should. This problem arises because at

, where observational constraints are nonexistent, the UVB amplitude is far too high. We introduce a new methodology to remedy this issue, and we generate self-consistent photoionization and photoheating rates to model any chosen reionization history. Following this approach, we run a suite of hydrodynamical simulations of different reionization scenarios and explore the impact of the timing of reionization and its concomitant heat injection on the thermal state of the IGM. We present a comprehensive study of the pressure smoothing scale of IGM gas, illustrating its dependence on the details of both hydrogen and helium reionization, and argue that it plays a fundamental role in interpreting Lyα forest statistics and the thermal evolution of the IGM. The premature IGM heating we have uncovered implies that previous work has likely dramatically overestimated the impact of photoionization feedback on galaxy formation, which sets the minimum halo mass able to form stars at high redshifts. We make our new UVB photoionization and photoheating rates publicly available for use in future simulations.
Three-dimensional Explosion Geometry of Stripped-envelope Core-collapse Supernovae. II. Modeling of Polarization
Authors: Tanaka Masaomi , Maeda Keiichi , Mazzali Paolo A. , Kawabata Koji S. , Nomoto Ken’ichi 
Published: March 2017

Abstract
We present modeling of line polarization to study the multidimensional geometry of stripped-envelope core-collapse supernovae (SNe). We demonstrate that a purely axisymmetric, two-dimensional (2D) geometry cannot reproduce a loop in the Stokes Q − U diagram, that is, a variation of the polarization angles along the velocities associated with the absorption lines. On the contrary, three-dimensional (3D) clumpy structures naturally reproduce the loop. The fact that the loop is commonly observed in stripped-envelope SNe suggests that SN ejecta generally have a 3D structure. We study the degree of line polarization as a function of the absorption depth for various 3D clumpy models with different clump sizes and covering factors. A comparison between the calculated and observed degree of line polarization indicates that a typical size of the clump is relatively large, ≳25% of the photospheric radius. Such large-scale clumps are similar to those observed in the SN remnant Cassiopeia A. Given the small size of the observed sample, the covering factor of the clumps is only weakly constrained (∼5%–80%). The presence of a large-scale clumpy structure suggests that the large-scale convection or standing accretion shock instability takes place at the onset of the explosion.
How to Detect Inclined Water Maser Disks (and Possibly Measure Black Hole Masses)
Authors: Darling Jeremy 
Published: March 2017

Abstract
We describe a method for identifying inclined water maser disks orbiting massive black holes and for potentially using them to measure black hole masses. Owing to the geometry of maser amplification pathways, the minority of water maser disks are observable: only those viewed nearly edge-on have been identified, suggesting that an order of magnitude additional maser disks exist. We suggest that inward-propagating masers are gravitationally deflected by the central black hole, thereby scattering water maser emission out of the disk plane and enabling detection. The signature of an inclined water maser disk would be narrow masers near the systemic velocity that appear to emit from the black hole position, as identified by the radio continuum core. To explore this possibility, we present high-resolution (0.″07–0.″17) Very Large Array line and continuum observations of 13 galaxies with narrow water maser emission and show that three are good inclined-disk candidates (five remain ambiguous). For the best case, CGCG 120−039, we show that the maser and continuum emission are coincident to within 3.5 ± 1.4 pc (6.7 ± 2.7 mas). Subsequent very long baseline interferometric maps can confirm candidate inclined disks and have the potential to show maser rings or arcs that provide a direct measurement of black hole mass, although the mass precision will rely on knowledge of the size of the maser disk.
Les cultures juvéniles à l’ère de la globalisation : une approche par le cosmopolitisme esthético-culturel
Authors: Cicchelli Vincenzo , Octobre Sylvie 
Published: March 2017

Les œuvres et contenus culturels circulent de manière croissante dans le monde et contribuent à façonner des répertoires et des goûts juvéniles désormais internationalisés. Ainsi la série Game of Thrones , qui a battu tous les records d’audience, Waka waqua , l’hymne de la Coupe du monde de football en Afrique du Sud en 2010 interprété par Shakira, chanteuse colombienne qui fait carrière aux États-Unis ou encore Naruto, personnage de manga japonais, sont-ils devenus des références partagées par les jeunes Français aujourd’hui, aux côtés d’icônes nationales comme Astérix ou David Guetta.	Mangas, comics, films asiatiques, blockbusters hollywoodiens, cinéma bollywoodien, séries sud-coréennes ou scandinaves et musiques de tous les continents fonctionnent comme autant de fenêtres sur le monde et contribuent à rendre l’étranger familier. Que ce soit dans le domaine de la pop musique, des jeux vidéo, des séries télévisées, de la littérature ou du cinéma, la globalisation des industries culturelles et la circulation croissante des œuvres et des contenus, facilitée par la technologie numérique, sont ainsi des facteurs majeurs de l’internationalisation des répertoires de consommations et des imaginaires culturels des jeunes.	Comment les jeunes construisent-ils leur rapport au monde par l’intermédiaire de biens culturels globalisés ? Cinq configurations de cosmopolitisme esthétique et culturel sont identifiées à partir du degré d’internationalisation des consommations et préférences, du mode linguistique de consommation (français ou langue originale), ainsi que des imaginaires globaux et des valeurs qui leur sont associés. Du cosmopolitisme involontaire lié à la consommation de la production culturelle mainstream , à des formes plus engagées d’ouverture (cosmopolitisme sectoriel et principiel), mais aussi de la préférence culturelle nationale à l’impossible cosmopolitisme, les consommations culturelles des jeunes leur confèrent des ressources et des compétences et dessinent des rapports au monde contemporain variés où le cosmopolitisme ordinaire devient une norme inclusive de bon goût générationnel.
Nonconforming Finite Element Method Applied to the Driven Cavity Problem
Authors: Lim Roktaek , Sheen Dongwoo 
Published: March 2017

AbstractA cheapest stable nonconforming finite element method is presented for solving the incompressible flow in a square cavity without smoothing the corner singularities. The stable cheapest nonconforming finite element pair based on P1×P0 on rectangularmeshes [29] is employed with a minimal modification of the discontinuous Dirichlet data on the top boundary, where is the finite element space of piecewise constant pressures with the globally one-dimensional checker-board pattern subspace eliminated. The proposed Stokes elements have the least number of degrees of freedom compared to those of known stable Stokes elements. Three accuracy indications for our elements are analyzed and numerically verified. Also, various numerous computational results obtained by using our proposed element show excellent accuracy.
A Simple Explanation of Superconvergence for Discontinuous Galerkin Solutions to ut+ux=0
Authors: Roe Philip 
Published: March 2017

AbstractThe superconvergent property of the Discontinuous Galerkin (DG) method for linear hyperbolic systems of partial differential equations in one dimension is explained by relating the DG method to a particular continuous method, whose accuracy depends in part on a local analysis, and in part on information transferred from upwind elements.
Pressure-Correction Projection FEM for Time-Dependent Natural Convection Problem
Authors: Wu Jilian , Feng Xinlong , Liu Fei 
Published: March 2017

AbstractPressure-correction projection finite element methods (FEMs) are proposed to solve nonstationary natural convection problems in this paper. The first-order and second-order backward difference formulas are applied for time derivative, the stability analysis and error estimates of the semi-discrete schemes are presented using energy method. Compared with characteristic variational multiscale FEM, pressure-correction projection FEMs are more efficient and unconditionally energy stable. Ample numerical results are presented to demonstrate the effectiveness of the pressure-correction projection FEMs for solving these problems.
Medication Use among Veterans across Health Care Systems
Authors: Nguyen Khoa A. , Haggstrom David A. , Ofner Susan , Perkins Susan M. , French Dustin D. , Myers Laura J. , Rosenman Marc , Weiner Michael , Dixon Brian E. , Zillich Alan J. 
Published: March 2017

SummaryIntroduction: Dual healthcare system use can create gaps and fragments of information for patient care. The Department of Veteran Affairs is implementing a health information exchange (HIE) program called the Virtual Lifetime Electronic Record (VLER), which allows providers to access and share information across healthcare systems. HIE has the potential to improve the safety of medication use. However, data regarding the pattern of outpatient medication use across systems of care is largely unknown. Therefore, the objective of this study is to describe the prevalence of medication dispensing across VA and non-VA health care systems among a cohort Veteran population Methods: This study included all Veterans who had two outpatient visits or one inpatient visit at the Indianapolis VA during a 1-year period prior to VLER enrollment. Source of medication data was assessed at the subject level, and categorized as VA, INPC (non-VA), or both. The primary target was identification of sources for medication data. Then, we compared the mean number of prescriptions, as well as overall and pairwise differences in medication dispensing.Results: Out of 52,444 Veterans, 17.4% of subjects had medication data available in a regional HIE. On average, 40 prescriptions per year were prescribed for Veterans who used both sources compared to 29 prescriptions per year from VA only and 25 prescriptions per year from INPC only sources. The annualized prescription rate of Veterans in the dual use group was 36% higher than those who had only VA data available and 61% higher than those who had only INPC data available.Conclusions: Our data demonstrated that 17.4% of subjects had medication use identified from non-VA sources, including prescriptions for antibiotics, antineoplastics, and anticoagulants. These data support the need for HIE programs to improve coordination of information, with the potential to reduce adverse medication interactions and improve medication safety.
A chironomid-based mean July temperature inference model from the south-east margin of the Tibetan Plateau, China
Authors: Zhang Enlou , Chang Jie , Cao Yanmin , Tang Hongqu , Langdon Pete , Shulmeister James , Wang Rong , Yang Xiangdong , Shen Ji 
Published: March 2017

Abstract. A chironomid-based calibration training set comprised of 100 lakes from south-western China was established. Multivariate ordination analyses were used to investigate the relationship between the distribution and abundance of chironomid species and 18 environmental variables from these lakes. Canonical correspondence analyses (CCAs) and partial CCAs showed that mean July temperature is one of the independent and significant variables explaining the second-largest amount of variance after potassium ions (K+) in 100 south-western Chinese lakes. Quantitative transfer functions were created using the chironomid assemblages for this calibration data set. The second component of the weighted-average partial least squares (WA-PLS) model produced a coefficient of determination (r2bootstrap) of 0.63, maximum bias (bootstrap) of 5.16 and root-mean-square error of prediction (RMSEP) of 2.31 °C. We applied the transfer functions to a 150-year chironomid record from Tiancai Lake (26°38′3.8 N, 99°43′ E; 3898 m a.s.l.), Yunnan, China, to obtain mean July temperature inferences. We validated these results by applying several reconstruction diagnostics and comparing them to a 50-year instrumental record from the nearest weather station (26°51′29.22′′ N, 100°14′2.34′′ E; 2390 m a.s.l.). The transfer function performs well in this comparison. We argue that this 100-lake large training set is suitable for reconstruction work despite the low explanatory power of mean July temperature because it contains a complete range of modern temperature and environmental data for the chironomid taxa observed and is therefore robust.
Experimental study on retardation of a heavy NAPL vapor in partially saturated porous media
Authors: Kleinknecht Simon Matthias , Class Holger , Braun Jürgen 
Published: March 2017

Abstract. Non-aqueous-phase liquid (NAPL) contaminants introduced into the unsaturated zone spread as a liquid phase; however, they can also vaporize and migrate in a gaseous state. Vapor plumes migrate easily and thus pose a potential threat to underlying aquifers. Large-scale column experiments were performed to quantify partitioning processes responsible for the retardation of carbon disulfide (CS2) vapor in partially saturated porous media. The results were compared with a theoretical approach taking into account the partitioning into the aqueous phase as well as adsorption to the solid matrix and to the air–water interface. The experiments were conducted in large, vertical columns (i.d. of 0.109 m) of 2 m length packed with different porous media. A slug of CS2 vapor and the conservative tracer argon was injected at the bottom of the column followed by a nitrogen chase. Different seepage velocities were applied to characterize the transport and to evaluate their impact on retardation. Concentrations of CS2 and argon were measured at the top outlet of the column using two gas chromatographs. The temporal-moment analysis for step input was employed to evaluate concentration breakthrough curves and to quantify dispersion and retardation. The experiments conducted showed a pronounced retardation of CS2 in moist porous media which increased with water saturation. The comparison with an analytical solution helped to identify the relative contributions of partitioning processes to retardation. Thus, the experiments demonstrated that migrating CS2 vapor is retarded as a result of partitioning processes. Moreover, CS2 dissolved in the bulk water is amenable to biodegradation. The first evidence of CS2 decay by biodegradation was found in the experiments. The findings contribute to the understanding of vapor-plume transport in the unsaturated zone and provide valuable experimental data for the transfer to field-like conditions.
Meteorological factors driving glacial till variation and the associated periglacial debris flows in Tianmo Valley, south-eastern Tibetan Plateau
Authors: Deng Mingfeng , Chen Ningsheng , Liu Mei 
Published: March 2017

Abstract. Meteorological studies have indicated that high alpine environments are strongly affected by climate warming, and periglacial debris flows are frequent in deglaciated regions. The combination of rainfall and air temperature controls the initiation of periglacial debris flows, and the addition of meltwater due to higher air temperatures enhances the complexity of the triggering mechanism compared to that of storm-induced debris flows. On the south-eastern Tibetan Plateau, where temperate glaciers are widely distributed, numerous periglacial debris flows have occurred over the past 100 years, but none occurred in the Tianmo watershed until 2007. In 2007 and 2010, three large-scale debris flows occurred in the Tianmo Valley. In this study, these three debris flow events were chosen to analyse the impacts of the annual meteorological conditions, including the antecedent air temperature and meteorological triggers. The remote sensing images and field measurements of the adjacent glacier suggested that sharp glacier retreats occurred in the 1 to 2 years preceding the events, which coincided with spikes in the mean annual air temperature. Glacial till changes providing enough active sediment driven by a prolonged increase in the air temperature are a prerequisite of periglacial debris flows. Different factors can trigger periglacial debris flows, and they may include high-intensity rainfall, as in the first and third debris flows, or continuous, long-term increases in air temperature, as in the second debris flow event.