Detection of new eruptions in the Magellanic Clouds LBVs R 40 and R 110

We performed a spectroscopic and photometric analysis to study new eruptions in two luminous blue variables (LBVs) in the Magellanic Clouds. We detected a strong new eruption in the LBV R40 that reached $V \sim 9.2$ in 2016, which is around $1.3$ mag brighter than the minimum registered in 1985. During this new eruption, the star changed from an A-type to a late F-type spectrum. Based on photometric and spectroscopic empirical calibrations and synthetic spectral modeling, we determine that R\,40 reached $T_{\mathrm{eff}} = 5800-6300$~K during this new eruption. This object is thereby probably one of the coolest identified LBVs. We could also identify an enrichment of nitrogen and r- and s-process elements. We detected a weak eruption in the LBV R 110 with a maximum of $V \sim 9.9$ mag in 2011, that is, around $1.0$ mag brighter than in the quiescent phase. On the other hand, this new eruption is about $0.2$ mag fainter than the first eruption detected in 1990, but the temperature did not decrease below 8500 K. Spitzer spectra show indications of cool dust in the circumstellar environment of both stars, but no hot or warm dust was present, except by the probable presence of PAHs in R\,110. We also discuss a possible post-red supergiant nature for both stars

Alterações na matéria orgânica e nas características químicas de um Podzol hidromórfico sob pastagens cultivadas no Pantanal Sul-Mato-Grossense.

Estudou-se uma cronosseqüência de introdução de pastagens cultivadas em áreas com 10 e 20 anos de implantação, tendo uma área de Cerrado intacto como referência. Coletaram-se amostras até 40cm de profundidade ao longo de dois transectos, para cálculo dos estoques de C e N e determinações químicas. Também abriram-se trincheiras e coletaram-se amostras de solo até 1m de profundidade, para estudo das variações nos conteúdos de C e N no perfil. Após 10 anos de cultivo, o solo apresentou aumento no teor de bases trocáveis e na capacidade de troca catiônica, e diminuição da acidez. Entretanto, após 20 anos, os teores de bases trocáveis e a capacidade de troca catiônica diminuíram e a acidez aumentou, indicando tendência do sistema de retornar ao equilíbrio antigo. O fósforo apresentou diminuição nos teores em função do cultivo, porém, após 20 anos de cultivo os seus teores ainda eram satisfatórios. Observaram-se redução de 28% no conteúdo de C na camada de 0-40cm na área sob pastagem de 20 anos e alteração na proporção relativa das frações húmicas. No Cerrado intacto e na pastagem de 20 anos predominou a fração ácido fúlvico; sob pastagem de 10 anos, humina. Não se observou diferença significativa nos conteúdos de nitrogênio entre as áreas estudadas.bitstream/item/37423/1/BP29.pd

13C e a Dinâmica do carbono orgânico do solo em Pastagem cultivada no Pantanal Sul-mato-grossense.

O regime cíclico de cheias do Pantanal ocasiona épocas críticas de disponibilidade de forragens nativas, base alimentar do rebanho bovino de corte, principal atividade econômica da região. Isso tem levado a alterações no sistema de produção tradicional, através da introdução de pastagens cultivadas, principalmente em "cordilheiras". A substituição da vegetação nativa por sistemas cultivados pode modificar as características físicas e químicas do solo, bem como da matéria orgânica, tanto do ponto de vista quantitativo como qualitativo. O objetivo deste trabalho foi avaliar as alterações na matéria orgânica de um solo ESPODOSSOLO FERROCÁRBICO Hidromórfico decorrentes da introdução de Brachiaria decumbens, em área de cerrado não inundável na sub-região da Nhecolândia, Pantanal Mato-Grossense, através da técnica do 13C. As amostragens foram realizadas numa fazenda da sub-região da Nhecolândia (porção sul do cone aluvial do rio Taquari) MS, em áreas de pastagem cultivada com 10 e 20 anos de implantação e de vegetação nativa, constituída por cerrado, sobre solos ESPODOSSOLO FERROCÁRBICO Hidromórfico. Foram abertas trincheiras no topo do terreno de cada área, com 1,5 m de profundidade, e coletadas amostras de solo até 1 m de profundidade (0-10, 10-20 cm e a partir daí, de 20 em 20 cm). Foram feitas as seguintes determinações: carbono orgânico para todas as amostras; densidade aparente para amostras até 40 cm de profundidade; e 13C para amostras das camadas 0-10 e 10-20 cm. Foi observado que o conteúdo da matéria orgânica do solo, expresso em tC/ha, com a introdução da pastagem aumentou 55% para a camada de 0-40 cm, após 20 anos de cultivo, sendo que 29% do carbono do solo, na camada 0-20 cm, foi originário da vegetação nativa. A incorporação anual de carbono no solo pela pastagem foi estimada em 1,0 t/ha.bitstream/CPAP/55921/1/BP74.pdfFormato Eletrônico

An infrared diagnostic for magnetism in hot stars

Magnetospheric observational proxies are used for indirect detection of magnetic fields in hot stars in the X-ray, UV, optical, and radio wavelength ranges. To determine the viability of infrared (IR) hydrogen recombination lines as a magnetic diagnostic for these stars, we have obtained low-resolution (R~1200), near-IR spectra of the known magnetic B2V stars HR 5907 and HR 7355, taken with the Ohio State Infrared Imager/Spectrometer (OSIRIS) attached to the 4.1m Southern Astrophysical Research (SOAR) Telescope. Both stars show definite variable emission features in IR hydrogen lines of the Brackett series, with similar properties as those found in optical spectra, including the derived location of the detected magnetospheric plasma. These features also have the added advantage of a lowered contribution of stellar flux at these wavelengths, making circumstellar material more easily detectable. IR diagnostics will be useful for the future study of magnetic hot stars, to detect and analyze lower-density environments, and to detect magnetic candidates in areas obscured from UV and optical observations, increasing the number of known magnetic stars to determine basic formation properties and investigate the origin of their magnetic fields.Comment: 4 pages, accepted for publication in A&

Water balance climatology under conditions of future climate scenarios in the Pantanal Nhecolândia, Brazil.

The objective of this work is to investigate the behavior of water conditions due to global warming analyzing future water availability for the Pantanal Sul Mato-grossense.(Embrapa Gado de Corte. Documentos, 216). Coordenador Roberto Giolo de Almeida. II SIGEE. Disponível em: . Acesso em: 01 dez. 2016

Convergent and discriminant validities of SCBE-30 questionnaire using correlated trait–correlated method Minus One

Correlated trait–correlated method minus one was used to evaluate convergent and discriminant validity of Social Competence Behavior Evaluation questionnaire (Social Competence, Anger-Aggression, Anxiety-Withdrawal) between multiple raters. A total of 369 children (173 boys and 196 girls; Mage = 55.85, SDage = 11.54) were rated by their mothers, fathers, and teachers. Results showed more convergence between parents than parent-teacher ratings. Mother-teacher share a common view of child behavior that is not shared with father. Parents had more difficulty distinguishing internalizing and externalizing behaviors (especially fathers). Measurement invariance across child sex was explored, results imply that differences between boys and girls were not due to measure. Girls (compare to boys) were described as more social competent by their fathers and teachers, while boys as more aggressive by mothers and teachers.info:eu-repo/semantics/publishedVersio

Early father-child and mother-child attachment relationships: contributions to preschoolers’ social competence

The main goal of this study was to explore the contributions of early father-child and mother-child attachment relationships to children’s later social competence with their preschool peers; possible unique and shared contributions were tested. Using a multi-method design and focusing on direct observation, attachment was assessed at home at age 3 with the Attachment Behavior Q-sort (AQS) and two years later social competence was assessed at classrooms of 5-year-olds using a set of seven measurement indicators that are part of the Hierarchical Model of Social Competence. Results show that attachment to each parent made unique and significant contributions to children’s social competence and suggested the possibility that each caregiver may have somewhat different patterns of influence on the different indicators of children’s social competence. Findings also suggest the possibility that a secure attachment with one parent may buffer the impact of having an insecure relationship with the other. Due to sample size these results should be seen as a starting point to generate new and larger studies.info:eu-repo/semantics/acceptedVersio

Optical and Near Infrared Study of the Cepheus E outflow, a very low excitation object

We present images and spectra of the Cepheus E (Cep E) region at both optical and infrared wavelengths. Only the brightest region of the southern lobe of the Cep E outflow reveals optical emission, suggesting that the extinction close to the outflow source plays an important r\^ole in the observed difference between the optical and IR morphologies. Cep E is a unique object since it provides a link between the spectroscopic properties of the optical Herbig-Haro (HH) objects and those of deeply embedded outflows.Comment: Accepted Astron. J., 8 files: paper, tables plus 6 figure

Marketing accountability and marketing automation: evidence from Portugal

Purpose: The present study seeks to outline the role of marketing automation (MA) in measuring the return on marketing activities and the challenges associated with reaching accountability in marketing. Design/methodology/approach: To investigate the objective of the study, the authors adopted a qualitative approach, conducting an exploratory study among ten key informants located in Portugal. Findings: Based on the results of the qualitative analysis, a conceptual framework is proposed, which includes both strategic- and operational-level factors with the goal of creating a value-based agenda. In this agenda, executives such as the Chief Marketing Officer emerge as value creators, fostering business scalability, and further arguments are provided to justify budget allocation to MA activities. Originality/value: Through careful research of the elements that characterize the phenomenon under study, the present paper ultimately contributes to a better understanding of MA and accountability within the current business paradigm