Epibenthic foraminiferal d13C in the Recent deep Arctic Ocean

Low planktic and benthic d18O and d13C values in sediments from the Nordic seas of cold stadials of the last glaciation have been attributed to brines, formed similar to modern ones in the Arctic Ocean. To expand on the carbon isotopes of this hypothesis I investigated benthic d13C from the modern Arctic Ocean. I show that mean d13C values of live epibenthic foraminifera from the deep Arctic basins are higher than mean d13C values of upper slope epibenthic foraminifera. This agrees with mean high d13C values of dissolved inorganic carbon (DIC) in Arctic Bottom Water (ABW), which are higher than mean d13CDIC values from shallower water masses of mainly Atlantic origin. However, adjustments for oceanic 13C-Suess depletion raise subsurface and intermediate water d13CDIC values over ABW d13CDIC ones. Accordingly, during preindustrial Holocene times, the d13CDIC of ABW was as high or higher than today, but lower than the d13CDIC of younger subsurface and intermediate water. If brine-enriched water significantly ventilated ABW, brines should have had high d13CDIC values. Analogously, high-d13CDIC brines may have been formed in the Nordic seas during warm interstadials. During cold stadials, when most of the Arctic Ocean was perennially sea-ice covered, a cessation of high-d13CDIC brine rejection may have lowered d13CDIC values of ABW, and ultimately the d13CDIC in Nordic seas intermediate and deep water. So, in contrast to the idea of enhanced brine formation during cold stadials, the results of this investigation imply that a cessation of brine rejection would be more likely.

Online information seeking by patients with bipolar disorder:results from an international multisite survey

Background: Information seeking is an important coping mechanism for dealing with chronic illness. Despite a growing number of mental health websites, there is little understanding of how patients with bipolar disorder use the Internet to seek information. Methods: A 39 question, paper-based, anonymous survey, translated into 12 languages, was completed by 1222 patients in 17 countries as a convenience sample between March 2014 and January 2016. All patients had a diagnosis of bipolar disorder from a psychiatrist. Data were analyzed using descriptive statistics and generalized estimating equations to account for correlated data. Results: 976 (81 % of 1212 valid responses) of the patients used the Internet, and of these 750 (77 %) looked for information on bipolar disorder. When looking online for information, 89 % used a computer rather than a smartphone, and 79 % started with a general search engine. The primary reasons for searching were drug side effects (51 %), to learn anonymously (43 %), and for help coping (39 %). About 1/3 rated their search skills as expert, and 2/3 as basic or intermediate. 59 % preferred a website on mental illness and 33 % preferred Wikipedia. Only 20 % read or participated in online support groups. Most patients (62 %) searched a couple times a year. Online information seeking helped about 2/3 to cope (41 % of the entire sample). About 2/3 did not discuss Internet findings with their doctor. Conclusion: Online information seeking helps many patients to cope although alternative information sources remain important. Most patients do not discuss Internet findings with their doctor, and concern remains about the quality of online information especially related to prescription drugs. Patients may not rate search skills accurately, and may not understand limitations of online privacy. More patient education about online information searching is needed and physicians should recommend a few high quality websites.

Green tree frog

http://digitalcommons.fiu.edu/fce_lter_photos/1282/thumbnail.jpg

Jennifer Rehage with a snook, Rookery Branch

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. This image is made available for non-commercial or educational use only.

Representaciones de la (in)seguridad en Medellín desde una perspectiva de género

Esta investigación busca dar cuenta de las representaciones sociales que tienen las mujeres de la (in) seguridad, en dos comunas de la ciudad que se caracterizan por contextos de violencia urbana, pero que tienen unas connotaciones específicas que conllevan a unas representaciones particulares dadas las relaciones con el entorno, los/as otras, el espacio físico y los grupos armados legales e ilegales y que no solo se reproducen en la violencia urbana en relación a un conflicto armado urbano sino a ese orden social que establece el comportamiento de hombres y mujeres en la sociedad

Representaciones de la (in)seguridad en Medellín desde una perspectiva de género

Esta investigación busca dar cuenta de las representaciones sociales que tienen las mujeres de la (in) seguridad, en dos comunas de la ciudad que se caracterizan por contextos de violencia urbana, pero que tienen unas connotaciones específicas que conllevan a unas representaciones particulares dadas las relaciones con el entorno, los/as otras, el espacio físico y los grupos armados legales e ilegales y que no solo se reproducen en la violencia urbana en relación a un conflicto armado urbano sino a ese orden social que establece el comportamiento de hombres y mujeres en la sociedad

Representaciones de la (in)seguridad en Medellín desde una perspectiva de género

Esta investigación busca dar cuenta de las representaciones sociales que tienen las mujeres de la (in) seguridad, en dos comunas de la ciudad que se caracterizan por contextos de violencia urbana, pero que tienen unas connotaciones específicas que conllevan a unas representaciones particulares dadas las relaciones con el entorno, los/as otras, el espacio físico y los grupos armados legales e ilegales y que no solo se reproducen en la violencia urbana en relación a un conflicto armado urbano sino a ese orden social que establece el comportamiento de hombres y mujeres en la sociedad

(Table 1) Sample locations and clay mineral data of sediment surface samples from the Barents Sea region

A new surface sediment sample set gained in the western Barents Sea by the MAREANO program has been analysed for basic clay mineral assemblages. Distribution maps including additional samples from earlier German research cruises to and off Svalbard are compiled. Some trends in the clay mineral assemblages are related to the sub-Barents Sea geology because the Quaternary sediment cover is rather thin. Additionally, land masses like Svalbard and northern Scandinavia dominate the clay mineral signal with their erosional products. Dense bottom water, very often of brine origin, that flows within deep troughs, such as the Storfjorden or Bear Island Trough, transport the clay mineral signal from their origin to the Norwegian-Greenland Sea.

Untangling a Web of Lies: Exploring Automated Detection of Deception in Computer-Mediated Communication

Safeguarding organizations against opportunism and severe deception in computer-mediated communication (CMC) presents a major challenge to CIOs and IT managers. New insights into linguistic cues of deception derive from the speech acts innate to CMC. Applying automated text analysis to archival email exchanges in a CMC system as part of a reward program, we assess the ability of word use (micro-level), message development (macro-level), and intertextual exchange cues (meta-level) to detect severe deception by business partners. We empirically assess the predictive ability of our framework using an ordinal multilevel regression model. Results indicate that deceivers minimize the use of referencing and self-deprecation but include more superfluous descriptions and flattery. Deceitful channel partners also over structure their arguments and rapidly mimic the linguistic style of the account manager across dyadic e-mail exchanges. Thanks to its diagnostic value, the proposed framework can support firms’ decision-making and guide compliance monitoring system development.

On the microstructure, growth pattern and original porosity of belemnite rostra: insights from calcitic Jurassic belemnites

Calcitic belemnite rostra are usually employed to perform paleoenvironmental studies based on geochemical data. However, several questions, such as their original porosity and microstructure, remain open, despite they are essential to make accurate interpretations based on geochemical analyses.This paper revisits and enlightens some of these questions. Petrographic data demonstrate that calcite crystals of the rostrum solidum of belemnites grow from spherulites that successively develop along the apical line, resulting in a “regular spherulithic prismatic” microstructure. Radially arranged calcite crystals emerge and diverge from the spherulites: towards the apex, crystals grow until a new spherulite is formed; towards the external walls of the rostrum, the crystals become progressively bigger and prismatic. Adjacent crystals slightly vary in their c-axis orientation, resulting in undulose extinction. Concentric growth layering develops at different scales and is superimposed and traversed by a radial pattern, which results in the micro-fibrous texture that is observed in the calcite crystals in the rostra.Petrographic data demonstrate that single calcite crystals in the rostra have a composite nature, which strongly suggests that the belemnite rostra were originally porous. Single crystals consistently comprise two distinct zones or sectors in optical continuity: 1) the inner zone is fluorescent, has relatively low optical relief under transmitted light (TL) microscopy, a dark-grey color under backscatter electron microscopy (BSEM), a commonly triangular shape, a “patchy” appearance and relatively high Mg and Na contents; 2) the outer sector is non-fluorescent, has relatively high optical relief under TL, a light-grey color under BSEM and low Mg and Na contents. The inner and fluorescent sectors are interpreted to have formed first as a product of biologically controlled mineralization during belemnite skeletal growth and the non-fluorescent outer sectors as overgrowths of the former, filling the intra- and inter-crystalline porosity. This question has important implications for making paleoenvironmental and/or paleoclimatic interpretations based on geochemical analyses of belemnite rostra.Finally, the petrographic features of composite calcite crystals in the rostra also suggest the non-classical crystallization of belemnite rostra, as previously suggested by other authors.

Um percurso vivido com um grupo heterogéneo de 3 e 4 anos

Relatório de Estágio apresentado à Escola Superior de Educação de Paula Frassinetti para a obtenção de grau de Mestre em Educação Pré-Escolar

CÂNCER DE COLO UTERINO: CONHECIMENTO E COMPORTAMENTO DE MULHERES PARA PREVENÇÃO

Objetivo: Analisar o conhecimento das mulheres em relação à prevenção do câncer de colo de útero e os fatores dificultadores acerca da realização da prática do exame preventivo. Métodos: Trata-se de um estudo do tipo observacional, de corte transversal e descritivo, com 110 mulheres entre 25 e 64 anos, atendidas em uma unidade de saúde, entre os meses de janeiro e março de 2014. Coletaram-se dados sociodemográficos e econômicos, aspectos ginecológicos e comportamento sobre o exame. Analisaram-se os dados através da estatística descritiva, apresentando valores absolutos e relativos. Resultados: Dados referentes ao significado do câncer uterino mostraram que 65 (59,1%) desconheciam seu significado, 69 (62,7%) sabiam como preveni-lo, 104 (94,5%) já realizaram o Papanicolau, 59 (53,6%) realizaram o Papanicolau há 1 ano, 62 (56,4%) realizam o exame preventivo anualmente e 88 (80%) sabiam a importância dessa realização. Quanto aos fatores encontrados referentes à dificuldade na realização do exame preventivo, 49 (44,5%) relataram ser a vergonha o fator mais impactante. Conclusão: Apesar de a maioria das mulheres realizar o exame periodicamente, muitas desconhecem a sua verdadeira finalidade, sentindo-se envergonhadas e constrangidas durante a realização do exame.