bluuebunny/crossref_metadata_2025 huggingface dataset:
FUSE Spectroscopy of the Accreting Hot Components in Symbiotic Variables
Authors: Sion Edward M. , Godon Patrick , Mikolajewska Joanna , Sabra Bassem , Kolobow Craig
Published: March 2017

We have conducted a spectroscopic analysis of the far-ultraviolet archival spectra of four symbiotic variables, EG And, AE Ara, CQ Dra, and RW Hya. RW Hya and EG And have never had a recorded outburst, while CQ Dra and AE Ara have outburst histories. We analyze these systems while they are in quiescence in order to help reveal the physical properties of their hot components via comparisons of the observations with optically thick accretion disk models and non-LTE model white dwarf photospheres. We have extended the wavelength coverage down to the Lyman limit with Far Ultraviolet Spectroscopic Explorer (FUSE) spectra. We find that the hot component in RW Hya is a low-mass white dwarf with a surface temperature of 160,000 K. We reexamine whether or not the symbiotic system CQ Dra is a triple system with a red giant transferring matter to a hot component made up of a cataclysmic variable in which the white dwarf has a surface temperature as low as ∼20,000 K. The very small size of the hot component contributing to the shortest wavelengths of the FUSE spectrum of CQ Dra agrees with an optically thick and geometrically thin (∼4% of the WD surface) hot (∼120,000 K) boundary layer. Our analysis of EG And reveals that its hot component is a hot, bare, low-mass white dwarf with a surface temperature of 80,000–95,000 K, with a surface gravity

. For AE Ara, we also find that a low-gravity (

), hot (

K) WD accounts for the hot component.
Evolution of Supernova Remnants Near the Galactic Center
Authors: Yalinewich A. , Piran T. , Sari R.
Published: March 2017

Supernovae near the Galactic center (GC) evolve differently from regular Galactic supernovae. This is mainly due to the environment into which the supernova remnants (SNRs) propagate. SNRs near the GC propagate into a wind swept environment with a velocity directed away from the GC, and a graded density profile. This causes these SNRs to be non-spherical, and to evolve faster than their Galactic counterparts. We develop an analytic theory for the evolution of explosions within a stellar wind, and verify it using a hydrodynamic code. We show that such explosions can evolve in one of three possible morphologies. Using these results we discuss the association between the two SNRs (SGR East and SGR A’s bipolar radio/X-ray lobes) and the two neutron stars (the Cannonball and SGR J1745-2900) near the GC. We show that, given the morphologies of the SNR and positions of the neutron stars, the only possible association is between SGR A’s bipolar radio/X-ray lobes and SGR J1745-2900. If a compact object was created in the explosion of SGR East, it remains undetected, and the SNR of the supernova that created the Cannonball has already disappeared.
Imaging the Schwarzschild-radius-scale Structure of M87 with the Event Horizon Telescope Using Sparse Modeling
Authors: Akiyama Kazunori , Kuramochi Kazuki , Ikeda Shiro , Fish Vincent L. , Tazaki Fumie , Honma Mareki , Doeleman Sheperd S. , E. Broderick Avery , Dexter Jason , Mościbrodzka Monika , Bouman Katherine L. , A. Chael Andrew , Zaizen Masamichi
Published: March 2017

We propose a new imaging technique for radio and optical/infrared interferometry. The proposed technique reconstructs the image from the visibility amplitude and closure phase, which are standard data products of short-millimeter very long baseline interferometers such as the Event Horizon Telescope (EHT) and optical/infrared interferometers, by utilizing two regularization functions: the ℓ
1-norm and total variation (TV) of the brightness distribution. In the proposed method, optimal regularization parameters, which represent the sparseness and effective spatial resolution of the image, are derived from data themselves using cross-validation (CV). As an application of this technique, we present simulated observations of M87 with the EHT based on four physically motivated models. We confirm that ℓ
1 + TV regularization can achieve an optimal resolution of ∼20%–30% of the diffraction limit λ/D
max, which is the nominal spatial resolution of a radio interferometer. With the proposed technique, the EHT can robustly and reasonably achieve super-resolution sufficient to clearly resolve the black hole shadow. These results make it promising for the EHT to provide an unprecedented view of the event-horizon-scale structure in the vicinity of the supermassive black hole in M87 and also the Galactic center Sgr A*.
Psychodynamique du travail et politique : quels enjeux ?
Authors: Dejours Christophe
Published: March 2017

Les enjeux politiques de la psychodynamique du travail sont abordés à partir de ce qu’elle apporte à l’analyse de l’activité en termes d’intelligence et d’engagement subjectif d’une part, à l’analyse de la coopération en termes de délibération collective et de production déontique d’autre part. La centralité politique du travail est examinée dans ses deux destins possibles : l’aliénation et la servitude volontaire d’un côté, l’accomplissement de soi et l’émancipation de l’autre, voire, au-delà, la construction de la démocratie par le travail. Les liens tissés à partir de la psychodynamique du travail avec le droit et avec la création artistique et littéraire sont envisagés comme relais de sensibilisation de l’espace public aux questions du travail. L’enjeu majeur de la discussion pourrait être la reconnaissance de l’organisation du travail comme dimension irréductible et décisive au plan politique.
Les formes de contestation du travail dans les années 1968
Authors: Zancarini-Fournel Michelle
Published: March 2017

Cette contribution étudie comment la contestation du travail dans les années 1968 n’a pas vraiment été abordée dans la discipline historique avant 1995, date à partir de laquelle les études sur les répertoires d’action au cours de la grève de mai-juin 1968 et les années suivantes se sont multipliées. Aux occupations et aux comités de grèves du printemps 1968, largement contrôlés par les directions syndicales, mais où apparaissent des figures nouvelles – femmes, immigrants, cadres parfois – ont succédé des actions spécifiques dans les ateliers contestant la hiérarchie et l’organisation du travail, grèves-bouchon qui bloquent l’ensemble de la production d’une entreprise. Outre l’égalité revendiquée apparaissent de nouvelles thématiques – santé au travail, autogestion –, mais aussi l’aspiration à changer sa vie, à quitter l’usine. Cette révolte des ouvriers spécialisés contribue à la réorganisation du processus de travail et à la transformation du capitalisme. Aujourd’hui, l’histoire de la contestation du travail se focalise sur l’agency des acteurs et sur les parcours spécifiques des migrants toujours pris dans une dialectique du juste et de l’injuste.
Le travail, absent du droit du travail ?
Authors: Wolmark Cyril
Published: March 2017

L’emploi, entendu comme l’ensemble des garanties accompagnant l’activité salariée, fait l’objet de nombreux dispositifs juridiques ; il constitue le cœur de ce que l’on nomme le « droit du travail ». En revanche, le travail paraît singulièrement délaissé, au point que l’on peut se demander s’il ne constitue pas paradoxalement un angle mort du droit du travail. L’étude des règles juridiques fait, certes, apercevoir comment le droit permet au capitalisme d’assurer la dépossession du travailleur subordonné du produit de son travail, et corrélativement son irresponsabilité. Reste que cette dépossession n’est jamais explicite en droit du travail ; elle se lit plutôt dans une comparaison avec le droit civil. L’indifférence du droit à l’égard du travail est surtout flagrante lorsque l’on considère le travail activité. Alors que les sciences sociales portent à ce dernier une attention renouvelée, le droit semble purement et simplement l’ignorer, l’examen de la subordination absorbant bien souvent l’étude du travail. Quelques pistes s’ouvrent néanmoins dans la législation récente qui, par des réglementations techniques – pénibilité, document unique d’évaluation des risques –, oblige l’employeur à porter attention au travail réellement accompli par ses salariés. Plus avant, les silences du droit pourraient constituer autant d’invitations à des collaborations interdisciplinaires, afin précisément de combler les lacunes de la protection des travailleurs.
Dialogue avec Leda Leal Ferreira autour de son ouvrage Analyses du Travail
Authors: Rolo Duarte
Published: March 2017

Dans cet entretien, Leda Leal Ferreira revient sur son parcours et ses travaux, rassemblés en partie dans un ouvrage récemment publié au Brésil, Análises do trabalho , encore inédit en France. Elle y évoque, à tour de rôle, les expériences et les terrains qui l’ont conduite à formaliser la méthode d’intervention qu’elle a baptisée d’« Analyse Collective du Travail », ses accords et désaccords avec la psychodynamique du travail et la richesse de l’œuvre de Marx pour analyser et comprendre les différentes facettes du travail.
Questions à la psychopathologie du travail
Authors: Pharo Patrick
Published: March 2017

L’auteur discute, à partir des conditions intersubjectives qui président à la constitution du sens, la constitution des formes de l’action. L’accent porté sur l’intersubjectivité laisse cependant ouvertes des questions relatives à l’affectivité et aux principes de la dynamique subjective. Comment caractériser les contenus de l’expérience subjective en référence à la souffrance et / ou au plaisir dans le travail ? Quelles sont les formes expressives de la souffrance et du plaisir ? À partir de ces réflexions se dégagent des interrogations spécifiques adressées à la psychopathologie du travail, en rapport avec l’élucidation de la constitution du sens des conduites en situation de travail.
Hypothèses sur l’implication subjective dans le lien social à propos de la souffrance au travail
Authors: Duclos Denis
Published: March 2017

En posant la souffrance et le plaisir comme des constructions sociales, l’auteur interroge le rapport subjectif aux normes sociales. La problématique clinique de la peur est analysée comme un construit social symbolique qui révèle les rapports dynamiques entre individu et collectif. Ces rapports reposent notamment sur des pratiques collectives d’incitation au risque ou au contraire d’euphémisation du risque lié aux situations de travail.
El papel del CSIC en el grado de apertura de la estrategia de innovación de las empresas españolas
Authors: Valmaseda-Andia Oihana , Albizu-Gallastegi Eneka
Published: March 2017

Las empresas, cada vez más, utilizan una estrategia de innovación abierta que les posibilita la realización y comercialización de sus innovaciones. En este trabajo se analiza cuál es el grado de apertura (amplitud y profundidad) de la estrategia de innovación seguida por 787 empresas españolas y el papel que juega el CSIC dentro de estas estrategias. Los resultados obtenidos sugieren la existencia de una clara asociación entre esta estrategia y el desempeño innovador de las empresas que conforman la muestra. Asimismo, se pone de manifiesto cuál es el diferencial del CSIC en relación con el resto de los actores que interactúan con las empresas en sus procesos de innovación. Más concretamente, este organismo se distingue significativamente por la aportación de conocimiento efectuada a las empresas a través del apoyo tecnológico o consultoría y las investigaciones bajo contrato. Finalmente, se establecen las implicaciones derivadas del estudio.
El diseño de las sedes web municipales de España. Una propuesta metodológica para su análisis
Authors: Piñeiro-Naval Valeriano , Igartua Juan José , Marañón Felipe
Published: March 2017

En este trabajo son examinados los principales aspectos del diseño de las sedes web municipales de España; esto es: su apariencia visual, su arquitectura de la información y su usabilidad. Para el acometimiento de este propósito se efectuó un análisis de contenido, método paradigmático de la investigación en comunicación. Una de las tareas fundamentales del protocolo de análisis consiste en la elaboración de un libro de códigos que, en este caso, se compuso de 41 variables. Asimismo, y tras la agrupación estratégica y razonada de algunos de esos ítems, se creó un Índice de Calidad Formal, destinado a la evaluación de los 500 sitios web que conformaron la muestra del estudio.
Evaluación de usabilidad de los portales web de las bibliotecas universitarias españolas a partir de un modelo heurístico cognitivo-emocional
Authors: Muñoz-Egido Daniel , Vianello Osti Marina
Published: March 2017

Se propone un modelo cognitivo-emocional de análisis de usabilidad basado en heurísticas y se aplica a los portales web de dieciocho bibliotecas universitarias. A partir de la revisión bibliográfica de la materia, se ha definido un conjunto de setenta y un criterios heurísticos agrupados en seis aspectos, a los cuales se les ha aplicado la métrica desarrollada por SIRIUS. El resultado de la evaluación arroja que la usabilidad media de los sitios web de las bibliotecas universitarias analizadas se sitúa en 72,30 sobre 100 con una Desviación Típica de 5,57, siendo los aspectos de la Atención y la Memoria a Largo Plazo o Aprendizaje los que menos puntuación alcanzan, y por lo tanto, aquellos que de una manera menos satisfactoria han sido afrontados desde el punto de vista del usuario.
Fuentes de conocimiento externo en el sector arqueológico español: Mapeo de la fase emergente en una actividad empresarial
Authors: Parga-Dans Eva , Castro-Martínez Elena , Sánchez-Barrioluengo Mabel
Published: March 2017

Estudios recientes señalan la importancia de las fuentes externas de conocimiento como estrategia para innovar. La evidencia empírica se fundamenta en encuestas nacionales y en industrias específicas. El presente estudio contribuye al análisis de las estrategias de incorporación de conocimiento externo mediante un caso de estudio y en un momento concreto: el sector arqueológico español y su emergencia como nueva actividad económica. Los resultados muestran que las fuentes de conocimiento externo implican diversos mecanismos, agentes y dos estrategias principalmente: cooperar y adquirir conocimiento. En un sector en expansión, basado en el conocimiento, que surge en un contexto incierto y cuyas fuentes de conocimiento están dispersas, el foco de la innovación puede encontrarse en las estrategias de búsqueda de conocimiento externo -cooperación y adquisición-, más que en fuentes internas.
Reelin expression in human liver of patients with chronic hepatitis C infection
Authors: Carotti Simone , Perrone Giuseppe , Amato Michelina , Vespasiani Gentilucci Umberto , Righi Daniela , Francesconi Maria , Pellegrini Claudio , Zalfa Francesca , Zingariello Maria , Picardi Antonio , Onetti Muda Andrea , Morini Sergio
Published: March 2017

Reelin is a secreted extracellular glycoprotein that plays a critical role during brain development. Several studies have described Reelin expression in hepatic stellate cells of the human liver. In order to investigate the possible role of Reelin in the process of hepatic fibrogenesis, in this study we investigated Reelin expression in the liver tissue of patients infected with the Hepatitis C Virus (HCV). On this basis, Reelin expression was analysed by immunohistochemistry during liver biopsies of 81 patients with HCV-related chronic hepatitis. A Knodell score was used to stage liver fibrosis. Hepatic stellate cells/myofibroblast immunohistochemical markers (CRBP-1, alpha-SMA) were also evaluated. As further confirmed by co-localization experiments (Reelin +CRBP-1), Reelin protein was expressed by hepatic stellate cells/myofibroblasts, and a significant positive correlation was found between Reelin expression and the stage of liver fibrosis (P=0.002). Moreover, Reelin correlated with CRBP-1 positive cells (P=0.002), but not with alpha-SMA, suggesting that Reelin should not be regarded as a marker of hepatic stellate cells/myofibroblasts differentiation but rather as a functional protein expressed during some phases of liver fibrosis. Furthermore, Disabled-1 (Dab1), a Reelin adaptor protein, was expressed in cells of ductular reaction suggesting a paracrine role for Reelin with regards these elements. In conclusion, Reelin was expressed by human hepatic stellate cells/myofibroblasts and the number of these cells increased significantly in the lobule as the liver fibrosis progressed, suggesting a role for Reelin in the activation of hepatic stellate cells/myofibroblasts during liver injury. Reelin may potentially be incorporated into liver injury evaluations in combination with other histological data.
Remote sensing of macrophyte morphological traits: Implications for the management of shallow lakes
Authors: Villa Paolo , Pinardi Monica , Tóth Viktor R. , Hunter Peter D. , Bolpagni Rossano , Bresciani Mariano
Published: March 2017

Macrophytes are important elements of freshwater ecosystems, fulfilling a pivotal role in biogeochemical cycles. The synoptic capabilities provided by remote sensing make it a powerful tool for monitoring aquatic vegetation characteristics and the functional status of shallow lake systems in which they occur. The latest generation of airborne and spaceborne imaging sensors can be effectively exploited for mapping morphologically – and physiologically – relevant vegetation features based on their canopy spectral response. The objectives of this study were to calibrate semi-empirical models for mapping macrophyte morphological traits (i.e., fractional cover, leaf area index and above-water biomass) from hyperspectral data, and to investigate the capabilities of remote sensing in supporting macrophyte monitoring and management. We calibrated spectral models using in situ reflectance and morphological trait measures and applied them to airborne hyperspectral imaging data, acquired over two shallow European water bodies (Lake Hídvégi, in Hungary, and Mantua lakes system, in Italy) in two key phenological phases. Maps of morphological traits were produced covering a broad range of aquatic plant types (submerged, floating, and emergent), common to temperate and continental regions, with an error level of 5.4% for fractional cover, 0.10 m2 m-2 for leaf area index, and 0.06 kg m-2 for above-water biomass. Based on these maps, we discuss how remote sensing could support monitoring strategies and shallow lake management with reference to our two case studies: i.e., by providing insight into spatial and species-wise variability, by assessing nutrient uptake by aquatic plants, and by identifying hotspot areas where invasive species could become a threat to ecosystem functioning and service provision.
A new multi-criteria method for the ecological assessment of lakes: A case study from the Transboundary Biosphere Reserve ‘West Polesie’ (Poland)
Authors: Sender Joanna , Maślanko Weronika , Różańska-Boczula Monika , Cianfaglione Kevin
Published: March 2017

A new multi-criteria method of evaluation and assessment of the ecological status of lakes is proposed. It is based on macrophytes analysis integrated with geomorphological, landscape and catchment sources of threats. A total of 22 lakes in the Transboundary Biosphere Reserve ‘West Polesie’ (Poland) were investigated along trophic (available nutrients) and human pressure gradients, testing the proposed method with ESMI and TRS indices. Therefore, the present indexation included 22 criteria (i.e., catchment land use, phytolittoral area, number of plant species) concerning three different assessing zones (lakeshore, littoral and surrounding area), and provided a five-class ecological classification. The proposed index, in addition to the general ecological conditions assessment of lakes, allows to point out a zonal evaluation, identifying the most critic zones in terms of ecological status. The proposed method can be universally adapted for any type of lakes, regardless of their geographical characteristics. It can be applied to system monitoring, and to support lakes biodiversity, functionality, conservation, restoration, water protection and uses, as well as water, territory and landscape management actions.
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008)
Authors: Christian Kenneth E. , Brune William H. , Mao Jingqiu
Published: March 2017

Abstract. Developing predictive capability for future atmospheric oxidation capacity requires a detailed analysis of model uncertainties and sensitivity of the modeled oxidation capacity to model input variables. Using oxidant mixing ratios modeled by the GEOS-Chem chemical transport model and measured on the NASA DC-8 aircraft, uncertainty and global sensitivity analyses were performed on the GEOS-Chem chemical transport model for the modeled oxidants hydroxyl (OH), hydroperoxyl (HO2), and ozone (O3). The sensitivity of modeled OH, HO2, and ozone to model inputs perturbed simultaneously within their respective uncertainties were found for the flight tracks of NASA's Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) A and B campaigns (2008) in the North American Arctic. For the spring deployment (ARCTAS-A), ozone was most sensitive to the photolysis rate of NO2, the NO2 + OH reaction rate, and various emissions, including methyl bromoform (CHBr3). OH and HO2 were overwhelmingly sensitive to aerosol particle uptake of HO2 with this one factor contributing upwards of 75 % of the uncertainty in HO2. For the summer deployment (ARCTAS-B), ozone was most sensitive to emission factors, such as soil NOx and isoprene. OH and HO2 were most sensitive to biomass emissions and aerosol particle uptake of HO2. With modeled HO2 showing a factor of 2 underestimation compared to measurements in the lowest 2 km of the troposphere, lower uptake rates (γHO2 < 0. 055), regardless of whether or not the product of the uptake is H2O or H2O2, produced better agreement between modeled and measured HO2.
Arctic hydroclimate variability during the last 2000 years – current understanding and research challenges
Authors: Linderholm Hans W. , Nicolle Marie , Francus Pierre , Gajewski Konrad , Helama Samuli , Korhola Atte , Solomina Olga , Yu Zicheng , Zhang Peng , D'Andrea William J. , Debret Maxime , Divine Dmitry , Gunnarson Björn E. , Loader Neil J. , Massei Nicolas , Seftifgen Kristina , Thomas Elizabeth K. , Werner Johannes
Published: March 2017

Abstract. Along with Arctic amplification, changes in Arctic hydroclimate have become increasingly apparent. Reanalysis data show increasing trends in Arctic temperature and precipitation over the 20th century, but changes are not homogenous across seasons or space. The observed hydroclimate changes are expected to continue, and possibly accelerate, in the coming century, not only affecting pan-Arctic natural ecosystems and human activities, but also lower latitudes through changes in atmospheric and oceanic circulation. However, a lack of spatiotemporal observational data makes reliable quantification of Arctic hydroclimate change difficult, especially in a long-term context. To understand hydroclimate variability and the mechanisms driving observed changes, beyond the instrumental record, climate proxies are needed. Here we bring together the current understanding of Arctic hydroclimate during the past 2000 years, as inferred from natural archives and proxies and palaeoclimate model simulations. Inadequate proxy data coverage is apparent, with distinct data gaps in most of Eurasia and parts of North America, which makes robust assessments for the whole Arctic currently impossible. Hydroclimate proxies and climate models indicate that the Medieval Climate Anomaly (MCA) was anomalously wet, while conditions were in general drier during the Little Ice Age (LIA), relative to the last 2000 years. However, it is clear that there are large regional differences, which are especially evident during the LIA. Due to the spatiotemporal differences in Arctic hydroclimate, we recommend detailed regional studies, e.g. including field reconstructions, to disentangle spatial patterns and potential forcing factors. At present, it is only possible to carry out regional syntheses for a few areas of the Arctic, e.g. Fennoscandia, Greenland and western North America. To fully assess pan-Arctic hydroclimate variability for the last two millennia additional proxy records are required.
A sprinkling experiment to quantify celerity-velocity differences at the hillslope scale
Authors: van Verseveld Willem J. , Barnard Holly R. , Graham Chris B. , McDonnell Jeffrey J. , Brooks J. Renée , Weiler Markus
Published: March 2017

Abstract. The difference between celerity and velocity of hillslope water flow is poorly understood. We assessed these differences by combining a 24-day hillslope sprinkling experiment with a spatially explicit hydrologic model analysis. We focused our work at Watershed 10 at the H. J. Andrews Experimental Forest in western Oregon. δ2H label was applied at the start of the sprinkler experiment. Maximum event water (δ2H labeled water) contribution was 26 % of lateral subsurface flow at 20 h. Celerities estimated from wetting front arrival times were generally much faster (on the order of 10–377 mm h−1) than average vertical velocities of δ2H (on the order of 6–17 mm h−1). In the model analysis, this was consistent with an identifiable effective porosity (fraction of total porosity available for mass transfer) parameter, indicating that subsurface mixing was controlled by an immobile soil fraction, resulting in an attenuated δ2H in lateral subsurface flow. Furthermore, exfiltrating bedrock groundwater that mixed with lateral subsurface flow captured at the experimental hillslope trench caused further reduction in the δ2H input signal. Our results suggest that soil depth variability played a significant role in the velocity-celerity responses. Deeper upslope soils damped the δ2H input signal and played an important role in the generation of the δ2H breakthrough curve. A shallow soil (~ 0.30 m depth) near the trench controlled the δ2H peak in lateral subsurface flow response. Simulated exit time and residence time distributions with the hillslope hydrologic model were consistent with our empirical analysis and provided additional insights into hydraulic behavior of the hillslope. In particular, it showed that water captured at the trench was not representative for the hydrological and mass transport behavior of the entire hillslope domain that generated total lateral subsurface flow, because of different exit time distributions for lateral subsurface flow captured at the trench and total lateral subsurface flow.
Groundwater impacts on surface water quality and nutrient loads in
lowland polder catchments: monitoring the greater Amsterdam area
Authors: Yu Liang , Rozemeijer Joachim , van Breukelen Boris M. , Ouboter Maarten , van der Vlugt Corné , Broers Hans Peter
Published: March 2017

Abstract. In this study, the spatial variability of the groundwater seepage impact was identified by exploiting the dense groundwater and surface water monitoring networks in Amsterdam and its surrounding polders. Twenty-three variables (concentrations of Total-N, Total-P, NH4, NO3, HCO3, SO4, Ca, and Cl in surface water and groundwater, seepage rate, elevation, land-use, and soil type) for 144 polders were analysed. The results imply that groundwater is a large source of nutrients in these mixed urban/agricultural catchments. It is confirmed by high correlations (R2 up to 0.88) between solutes in groundwater and surface water, together with the close similarities in their spatial patterns. The groundwater nutrient concentrations exceeded the surface water Environmental Quality Standards (EQSs) in 93 % of the polders for TP and in 91 % for TN. The elevated nutrient and bicarbonate concentrations in the groundwater seepage originate from the decomposition of organic matter in subsurface sediments coupled to sulfate reduction and possibly methanogenesis. The large loads of nutrient rich groundwater seepage into the deepest polders indirectly affect surface water quality in the surrounding area, because excess water from the deep polders is pumped out and used to supply water to the surrounding infiltrating polders in dry periods. The study shows the importance of the connection between groundwater and surface water nutrient chemistry in the greater Amsterdam area. We expect that taking account of groundwater-surface water interaction is also important in other subsiding and urbanising deltas around the world, where water is managed intensively in order to enable agricultural productivity and achieve water sustainable cities.
On the deep convection events and Antarctic Bottom Water formation in ocean reanalysis products
Authors: Aguiar Wilton , Mata Mauricio M. , Kerr Rodrigo
Published: March 2017

Abstract. Deep convection in open ocean polynyas are common sources of error on the representation of Antarctic Bottom Water (AABW) formation in Ocean General Circulation Models. Even though those events are well described in non-assimilatory ocean simulations, recent appearance of open ocean polynya in Estimating the Circulation and Climate of the Ocean Phase II reanalysis product raises a question if this spurious event is also found in state-of-art reanalysis products. In order to answer this question, we evaluate how three recently released high-resolution ocean reanalysis form AABW in their simulations. We found that two of them (ECCO2 and SoSE) create AABW by open ocean deep convection events in Weddell Sea, showing that assimilation of sea ice has not been enough to avoid open ocean polynya appearance. The third reanalysis – My Ocean University Reading – actually creates AABW by a rather dynamically accurate mechanism, depicting both continental shelf convection, and exporting of Dense Shelf Water to open ocean. Although the accuracy of the AABW formation in this reanalysis allows an advance in represent this process, the differences found between the real ocean and the simulated one suggests that ocean reanalysis still need substantial improvements to accurately represent AABW formation.
Bromine, iodine and sodium in surface snow along the 2013 Talos Dome–GV7 traverse (northern Victoria Land, East Antarctica)
Authors: Maffezzoli Niccolò , Spolaor Andrea , Barbante Carlo , Bertò Michele , Frezzotti Massimo , Vallelonga Paul
Published: March 2017

Abstract. Halogen chemistry in the polar regions occurs through the release of halogen elements from different sources. Bromine is primarily emitted from sea salt aerosols and other saline condensed phases associated with sea ice surfaces, while iodine is affected by the release of organic compounds from algae colonies living within the sea ice environment. Measurements of halogen species in polar snow samples are limited to a few sites although there is some evidence that they are related to sea ice extent. We examine here total bromine, iodine and sodium concentrations in a series of 2 m cores collected during a traverse from Talos Dome (72°48' S, 159°06' E) to GV7 (70°41' S, 158°51' E) analyzed by inductively coupled plasma-sector field mass spectrometry (ICP-SFMS) at a resolution of 5 cm. We find a distinct seasonality of the bromine enrichment signal in most of the cores, with maxima during the austral spring. Iodine shows average concentrations of 0.04 ppb with little variability. No distinct seasonality is found for iodine and sodium. The transect reveals homogeneous air-to-snow fluxes for the three chemical species along the transect due to competing effects of air masses originating from the Ross Sea and the Southern Ocean.
Application of a two-step approach for mapping ice thickness to various glacier types on Svalbard
Authors: Fürst Johannes Jakob , Gillet-Chaulet Fabien , Benham Toby J. , Dowdeswell Julian A. , Grabiec Mariusz , Navarro Francisco , Pettersson Rickard , Moholdt Geir , Nuth Christopher , Sass Björn , Aas Kjetil , Fettweis Xavier , Lang Charlotte , Seehaus Thorsten , Braun Matthias
Published: March 2017

Abstract. The basal topography is largely unknown beneath most glaciers and ice caps and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we present a two-step reconstruction approach for ice thickness that solves mass conservation over single or several connected drainage basins. The approach performs well for a variety of test geometries with abundant thickness measurements including marine- and land-terminating glaciers as well as a 2400 km2 ice cap on Svalbard. Input requirements for the first step are comparable to other approaches that have already been applied world-wide. In the first step, a geometrically controlled, non-local flux solution is converted into thickness values relying on the shallow ice approximation. In a second step, the thickness reconstruction is improved along fast-flowing glacier trunks on the basis of velocity observations. In both steps, thickness measurements are assimilated as internal boundary conditions. Each thickness field is presented together with a map of error estimates which stem from a formal propagation of input uncertainties. These estimates point out that the thickness field is least constrained near ice divides or in other stagnant areas. The error-estimate map also highlights key regions for future thickness surveys as well as a preference for across-flow acquisition. Withholding parts of the thickness measurements indicates that error estimates show a tendency to overestimate actual mismatch values. For very sparse or non-existent thickness information, our reconstruction approach indicates that we have to accept an average uncertainty of at least 25 % in the reconstructed thickness field. For Vestfonna, previous ice volume estimates have to be corrected upward by 22 %. We also find that a 12 % area fraction of the ice cap are in fact grounded below sea-level as compared to the previous 5 %-estimate.
Alfabetização pelos conhecimentos indígenas: reflexões sobre suas possibilidades e limitações
Authors: Giraldin Odair
Published: March 2017

O artigo reflete sobre a inserção dos professores indígenas no universoda pesquisa, através das suas experiencias tanto com a graduação emEducação Intercultural quanto com a pós-graduação na UniversidadeFederal de Goiás. Discuto sobre os conhecimentos indígenas e seusregistros, refletindo sobre as possibilidades e os limites da inserçãodos saberes indígenas na escola.
A IMAGÉTICA MEHI: REFLEXÕES INICIAIS SOBRE IMAGENS CUPE E IMAGENS KRAHÔ
Authors: Cuxi Joel , Herbetta Alexandre
Published: March 2017

O texto aqui apresentado é parte de um debate realizado atualmente noComitê Krahô-Apinajé do Núcleo Takinahakỹ de Formação SuperiorIndígena (NTFSI) tanto nas etapas de estudos em Goiânia quantonas etapas em Terra Indígena. Neste diálogo coletivo, apresentam-setrechos das falas e reflexões de dois membros do Comitê, os quaisbuscam pensar sobre a estética da imagem entre os mehi. Destaforma, identificam-se aspectos interessantes sobre a produção, o usoe a difusão de imagens entre os Krahô, os Apinajé e os cupe, os quaistêm relação direta com os modos de vida de cada população. Alémdisso, procura-se entender a importância da autoria na produçãodas respectivas imagens. Note-se que um dos objetivos do referidoComitê é a produção de material didático com conteúdo audiovisual.
CONHECIMENTOS DA MINHA CULTURA
Authors: Karajá Txiarawa
Published: March 2017

A minha pesquisa foi feita na Comunidade Indígena Iny (Karajá) deSanta Isabel do Morro, situada na Ilha do Bananal – TO. A aldeia ficaà beira do Rio Araguaia (Berohokỹ), do lado do estado do Tocantins,próxima da cidade de São Félix do Araguaia-MT. A pesquisa foirealizada com seis famílias diferentes: (1) família da Kuaxiru Karajá;(2) família de Tewahura Karajá; (3) família de Dirasi Karajá; (4) famíliade Kuriwiru Karajá; (5) família de Dorewaru Karajá; e (6) família deSiari Karajá. Esses são os anciãos e as anciãs que participaram donosso estudo sobre o Ciclo da vida do Iny.
CONTEXTUALIZAÇÃO DO CICLO DA VIDA JAVAÉ COMPLEXIDADE E SABEDORIA INY/JAVAÉ
Authors: Tekuala Javaé Hélio , W. Javaé Werehatxiari , Javaé Ruruca , Filho Texibà Javaé Valdemir
Published: March 2017

Os estudos aqui apresentados tratam da riqueza da cultura Javaé,como, por exemplo, das pinturas. Segundo os especialistas dessesaber existem 12 pinturas tradicionais e mais 12 que foraminventadas, tendo ao todo 24 pinturas. Cada uma dessas pinturas Inyestá relacionada aos animais, peixes e alguns objetos naturais como:cabaça, feijão etc. Outros conhecimentos também foram estudados: alimentação tradicional, atividades masculina e feminina, trabalho, parentesco, ou seja, pontos importantes da cultura para educar ealfabetizar as crianças e os jovens.
RELATÓRIO SOBRE TRABALHOS DE PROFESSORES APYÃWA QUE ATUAM NO ‘SABERES INDÍGENAS’
Authors: Tapirapé Arapaxigi
Published: March 2017

Os trabalhos que foram realizados pelos professores alfabetizadores.
NOMES PESSOAIS E SUAS FUNÇÕES SOCIAIS NA COMUNIDADE APYÃWA
Authors: Tenywaawi Tapirapé Gilson
Published: March 2017

Esta pesquisa tem o objetivo de analisar e discutir o sistema denomeação e as funções sociais dos nomes em Tapirapé.
PỲRPEX JÕ’AMJÕHQUẼN FESTA DA TORA DE BARRIGUDA
Authors: Cardoso Gavião Leonice
Published: March 2017

Escolhi o tema Pỳrpex jõ’ amjõhquẽn porque este é em ritual muitoimportante na minha comunidade e para todo o povo Gavião. Assim,é importante que o público em geral, tanto povos indígenas de outrasetnias como os não índios, tenham conhecimento desta festa, queé de fundamental importância para a cultura Gavião e que incluimúsicas rituais, danças, pinturas, corridas com tora e com flechas,alimentos e histórias da festa. É importante também trazermos essesconhecimentos para o contexto da escola a fim de reafirmar os valoresculturais do meu povo através da educação.
OS CRAQUES DA LIBRAS: A IMPORTÂNCIA DE UM FESTIVAL DE FOLCLORE SINALIZADO
Authors: Sutton-Spence Rachel , Felicio Márcia , De Araujo Machado Fernanda , De Arantes Leite Tarcisio , Lopes L'Astorina de Andrade Betty , Boldo Jaqueline , Carvalho Junior Daltro
Published: March 2017

O artigo tem foco na importância de um festival de folclore sinalizado para a comunidade surda brasileira e a língua brasileira de sinais. Explicamos a palavra ‘folclore’ no contexto da comunidade surda e descrevemos alguns festivais de poesia e folclore que já aconteceram no Brasil e em outros países. Defendemos que os festivais de folclore oferecem oportunidade de reunir a comunidade surda, fortalecer a identidade surda, desenvolver a língua de sinais e transmitir os processos folclóricos para os membros mais novos da comunidade. Como uma experiência reconhecendo a natureza colaborativa do folclore surdo, este artigo foi escrito como uma colaboração entre pesquisadores surdos e ouvintes, incluindo alunos de graduação, mestrandos e doutorandos e professores.
CONTOS DE FADAS E EDUCAÇÃO DE CRIANÇAS SURDAS
Authors: Miranda Oliveira Thainã , Borges Dias Santos Leila
Published: March 2017

Os contos de fadas sempre encantaram as crianças e, ainda hoje, continuam a seduzi-las. Esses contos possibilitam reflexões sobre os problemas interiores de seus leitores e auxiliam a construção da subjetividade infantil. As adaptações dessas histórias para a Libras, Língua Brasileira de Sinais, levam às crianças surdas, não apenas o prazer da fruição dos contos de fadas, mas também os benefícios psicológicos advindos dessas narrativas. Com o suporte teórico dos postulados apresentados por Bruno Bettelheim e Joseph Campbell, em textos fundadores sobre o mito e o conto de fadas, o objetivo deste trabalho é trazer algumas reflexões sobre a importância dos contos de fadas, adaptados para Libras, na educação e a formação da subjetividade das crianças surdas.
The effect of calcium and magnesium supplementation on performance and bone strength of broiler chickens
Authors: Karásek Filip , Štenclová Hana , Šťastní­k Ondřej , Mrkvicová Eva , Pavlata Leoš , Nedomová Šárka , Zeman Ladislav
Published: March 2017

Aim of the experiment was evaluation of the effect of reduced calcium and magnesium content in the broiler chickens diet on its parameters of fattening, bone strength and calcium and magnesium content in liver. The trial was performed with cockerels of Ross 308 hybrid (n = 160) which were fattened in cage batteries from day 11th to 36th day of age. Cockerels were divided into 4 groups (differ in various intake levels of calcium and magnesium) in four replications. The maize-wheat-soybean basal diet contained 2.33 g Ca and 1.58 g Mg per kilogram. Calcium was added by CaCO3 and magnesium by MgSO4. Control group (C) received feed mixture with added CaCO3 in dose of 19.49 g.kg-1 and 0.41 g.kg-1 of MgSO4. Three experimental groups contain added CaCO3 in dose of 11.83 g.kg-1 and 0 g.kg-1 MgSO4 (group Exp1); CaCO3 11.83 g.kg-1 and 0.41 g.kg-1 MgSO4 (group Exp2); CaCO3 19.49 g.kg-1 and 0 g.kg-1 MgSO4 (group Exp3), respectively. The feed consumption was daily monitored and the cockerels were weighed twice a week. At the end of the study the experimental animals were weighted and slaughtered by decapitation. The weight of carcasses, liver and proportion of breast and thigh muscle was determined in the selected chickens (n = 24). The atomic absorption spectrometry was used for Ca and Mg evaluation in liver tissues. Bone strength parameter was measured at the femur bone. The statistically significant differences (p >0.05) were not detected between control and experimental groups in the case of studied parameters of fattening, bone strength and calcium and magnesium content in the chicken´s liver. Based on the obtained results it could be concluded the reduction of determined elements in the chicken diet did not deteriorate parameters of yield, elements content in liver tissue as well as the bone strength of broiler chickens.
“There is no God and we are his prophets”: The Visionary Potential of Memory and Nostalgia in Cormac McCarthy'sNo Country for Old MenandThe Road
Authors: Pugh Marie-Reine
Published: March 2017

Memory and nostalgia work in complex, paradoxical ways in Cormac McCarthy's No Country for Old Men and The Road, haunting Sheriff Ed Tom Bell and the father, as well as bringing them to crucial realizations. They give up the traditional hero role for the more meaningful and generative image of “carrying the fire,” which unites the novels. Carrying the fire represents a memorial and nostalgic longing for home and family. Bell and the father attain this vision because of their obsession with the past, and their struggle with memory and nostalgia. Memory, for these characters, has both personal and collective dimensions. Nostalgia, likewise, has a dual function, following Svetlana Boym's definition of nostalgics as being capable of restorative and reflective longing for the past. Family, or Paul Ricœur's theory of close relations, bridges the gap between the conflicts of memory and nostalgia, acting as the means by which they understand this vision of carrying the fire while also embodying it. Additionally, the duality of both memory and nostalgia drive Bell and the father to seek a prophetic vision, a stability in the past to help them deal with present threats.
Compassion and Affirmation in Nietzsche
Authors: Harris Daniel I.
Published: March 2017

Nietzsche expresses ambivalence toward compassion. While he is most often critical of compassion as a moral response to others, he also sometimes praises forms of compassion made different by the different forms of life in which they are implicated. Accounting for this ambivalence, I argue that compassion as concern for suffering is not condemnable in itself, but only when such concern erases any vantage point on our situation that might lend suffering significance. In making this case, Nietzsche looks to norms of contest in the Greek agon as exemplary of a culture able to affirm human suffering and striving. Understanding that those affirmative elements of Greek life are extinguished through modern morality, Nietzsche puts forward an ideal of self-overcoming that, invested with something of what was affirmative in Greek life, offers us the possibility of making our finitude matter.
Dormancy overcoming, temperatures and substrates on germination of Mimosa tenuiflora Willd seeds
Authors: Benedito Clarisse Pereira , Ribeiro Maria Clarete Cardoso , Torres Salvador Barros , Guimarães Isaías Porfírio , Oliveira Kássya Jemina Borges de
Published: March 2017

Mimosa tenuiflora Willd., popularly known as jurema-preta, is an arboreal species of great importance for the brazilian Northeast due to its uses as a medicinal plant and in the restoration of degraded soils. No information is available in the Rules for Seed Analysis and the Instructions for Seed Analysis of Forest Species regarding ideal conditions for of this species. Thus, this study aimed at evaluating the influence of pre-germination treatments, in addition to verifying the germination performance at different temperatures and in different substrates. In both experiments, four replicates of 25 seeds were used for each treatment. In experiment I, seeds were submitted to the following methods for overcoming dormancy: witness - Intact seeds (T1) immersion in water at 100 °C for 1 (T2), 2 (T3), 3 (T4), 4 (T5), 5 (T6) and 6 min (T7), immersion in concentrated sulfuric acid for 1 (T8), 4 (T9), 7 (T10), 10 (T11) and 13 min (T12), scarification on sandpaper n° 80 (T13) and lopping in the region opposite the micropyle (T14). In experiment II, seed germination was evaluated in four types of substrates: between sand, paper on, paper roll and between vermiculite and at six different temperatures: 20, 25, 30, 35, 40 °C and alternating between 20 and 30 °C. Immersion in hot water for 1, 2, 3, 4, 5 and 6 min, sulfuric acid treatment for 10 and 13 min, sand paper and lopping were the most appropriate treatments to overcome seed dormancy. The seed germination of M. Tenuiflora should be carried out at 25 °C on paper roll substrate.
Haemonchus contortus resistance to monepantel in sheep: fecal egg count reduction tests and randomized controlled trials
Authors: Martins Aline Carvalho , Bergamasco Paula Luzia Formigoni , Felippelli Gustavo , Tebaldi José Hairton , Moraes Marcela Figueredo Duarte , Testi Alan Jonathan Pereira , Lapera Ivan Moura , Hoppe Estevam Guilherme Lux
Published: March 2017

Worm infections are a major cause of economic losses in sheep farming, and their control depends essentially on anthelmintic drugs. After decades without the discovery of new drug types, a new class of anthelmintics, called aminoacetonitrile derivatives, represented by monepantel, was released on the market. In order to evaluate a report of low efficacy of monepantel on a sheep farm in the municipality of Taiúva, state of São Paulo, Brazil, fecal egg count reduction and critical tests were performed on a Haemonchus contortus strain collected from this farm. To this end, ten animals were experimentally infected with 5000 H. contortus third-stage larvae, and these animals were divided into two groups, control and treated, according to the treatment with monepantel. The parameters evaluated were reduction in fecal egg counts on post-treatment days (PTD) 0, 2, 4, 7 and 14, and the therapeutic efficacy at the end of this period. Egg count reduction was observed starting on PTD 2, with a maximum reduction of 32.89% recorded on PTD 14. The critical test revealed 24.65% efficacy, indicating resistance to the active ingredient monepantel. The ineffectiveness of monepantel may be associated with the excessive use of the anthelmintic, which the farmer administered at intervals of less than one month, without technical guidance or a defined criterion. Given that the anthelmintic was used on this farm for less than one year, according to the farmer, it can be inferred that H. contortus develops resistance to monepantel in a few generations if the product is used incorrectly.