444 research outputs found
The media”s coverage of ”insecurity” in Argentina: victims, victimisers and lawsuits
Fear of crime and media influence on citizen risk perception is an issue that has grabbed the attention of the academia, approaching it from different perspectives. However, there are not too many case studies that address the current dynamics of this problem in Latin America from the perspective of quantitative content, although studies show that the topic has become a public concern in many Latin American countries. The overall objective of this paper is to analyze "insecurity" media coverage in the Argentinean newspapers Clarín, La Nación, and Página/12, both in electoral and non-electoral contexts. Based on concepts provided by the Agenda Setting and Framing theories, we will try to establish:1) the relevance of different issues associated with crime in the national press; 2) the actors referenced by newspapers as victims and perpetrators and the attributes they are associated with; and 3) the frames that prevail in their coverage.El miedo al crimen y la influencia de los medios de comunicación sobre la percepción del riesgo de la ciudadanía es un tema que ha acaparado la atención de la academia y ha sido abordado desde diversas perspectivas. Sin embargo, no existen demasiados estudios de caso que abordan las dinámicas actuales de esta problemática en América Latina desde el análisis de contenido cuantitativo, a pesar de que se trata del principal asunto de preocupación de la ciudadanía en muchos países de la región. El objetivo general del presente trabajo es analizar la cobertura mediática de la “inseguridad” en los diarios argentinos Clarín, La Nación y Página/12 en contextos electorales y no electorales. A partir de conceptos provistos por las teorías de la Agenda Setting y el Framing, en términos específicos se procura establecer: 1) cuál es la relevancia que adquieren los diferentes temas asociados al delito en la prensa gráfica nacional; 2) quiénes son los actores referenciados por los diarios como víctimas y victimarios y con qué atributos son representados; y 3) qué tipo de encuadres prevalecen en las coberturas
MaxEnt and dynamical information
The MaxEnt solutions are shown to display a variety of behaviors (beyond the
traditional and customary exponential one) if adequate dynamical information is
inserted into the concomitant entropic-variational principle. In particular, we
show both theoretically and numerically that power laws and power laws with
exponential cut-offs emerge as equilibrium densities in proportional and other
dynamics
To investigation of performance of the gas turbine plant, which operates with the working medium humidification in the inlet and overexpansion in the outlet
Abstract
The possibilities of increasing the specific power and efficiency of the gas turbine plant are considered by the working medium overexpansion behind the power turbine and the water injection into the engine inlet. The paper demonstrates that such a means can be used not only for a newly designed GTP, but also implemented in already operating power plants
Effect of orthopedic and functional orthodontic treatment in children with obstructive sleep apnea: A systematic review and meta-analysis
Orthodontic treatment is suggested in growing individuals to correct transverse maxillary deficiency and mandibular retrusion. Since, as a secondary effect, these orthodontic procedures may improve pediatric obstructive sleep apnea (OSA), this systematic review assessed their effects on apnea-hypopnea index (AHI) and oxygen saturation (SaO2). Twenty-five (25) manuscripts were included for qualitative synthesis, 19 were selected for quantitative synthesis. Five interventions were analyzed: rapid maxillary expansion (RME, 15 studies), mandibular advancement (MAA, five studies), myofunctional therapy (MT, four studies), and RME combined with MAA (one study). RME produced a significant AHI reduction and minimum SaO2 increase immediately after active treatment, at six and 12 months from baseline. A significant AHI reduction was also observed six and 12 months after the beginning of MAA treatment. MT showed positive effects, with different protocols. In this systematic review and meta-analysis of data from mainly uncontrolled studies, interceptive orthodontic treatments showed overall favorable effects on respiratory outcomes in pediatric OSA. However, due to the low to very low level of the body evidence, this treatment cannot be suggested as elective for OSA treatment. An orthodontic indication is needed to support this therapy and a careful monitoring is required to ensure positive improvement in OSA parameters
Histone Deacetylase and Microtubules as Targets for the Synthesis of Releasable Conjugate Compounds
Design and synthesis of an HDAC inhibitor and its merger with three tubulin binders to create releasable conjugate compounds is described. The biological evaluation includes: a) in vitro reactivity with glutathione, b) antiproliferative activity, c) cell cycle analysis and d) quantification of protein acetylation. The cellular pharmacology study indicated that the HDAC-inhibitor-drug conjugates retained antimitotic and proapoptotic activity with a reduced potenc
Impact of Nutritional Stress on Honeybee Gut Microbiota, Immunity, and Nosema ceranae Infection
Honeybees are important pollinators, having an essential role in the ecology of natural and agricultural environments. Honeybee colony losses episodes reported worldwide and have been associated with different pests and pathogens, pesticide exposure, and nutritional stress. This nutritional stress is related to the increase in monoculture areas which leads to a reduction of pollen availability and diversity. In this study, we examined whether nutritional stress affects honeybee gut microbiota, bee immunity, and infection by Nosema ceranae, under laboratory conditions. Consumption of Eucalyptus grandis pollen was used as a nutritionally poor-quality diet to study nutritional stress, in contraposition to the consumption of polyfloral pollen. Honeybees feed with Eucalyptus grandis pollen showed a lower abundance of Lactobacillus mellifer and Lactobacillus apis (Firm-4 and Firm-5, respectively) and Bifidobacterium spp. and a higher abundance of Bartonella apis, than honeybees fed with polyfloral pollen. Besides the impact of nutritional stress on honeybee microbiota, it also decreased the expression levels of vitellogenin and genes associated to immunity (glucose oxidase, hymenoptaecin and lysozyme). Finally, Eucalyptus grandis pollen favored the multiplication of Nosema ceranae. These results show that nutritional stress impacts the honeybee gut microbiota, having consequences on honeybee immunity and pathogen development. Those results may be useful to understand the influence of modern agriculture on honeybee health.Fil: Castelli, L.. Instituto de Investigaciones Biológicas "Clemente Estable"; UruguayFil: Branchiccela, B.. Instituto de Investigaciones Biológicas "Clemente Estable"; UruguayFil: Garrido, Paula Melisa. Universidad Nacional de Mar del Plata. Instituto de Investigaciones en Producción, Sanidad y Ambiente - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Producción, Sanidad y Ambiente; ArgentinaFil: Invernizzi, Ciro. No especifíca;Fil: Porrini, Martín Pablo. Universidad Nacional de Mar del Plata. Instituto de Investigaciones en Producción, Sanidad y Ambiente - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Producción, Sanidad y Ambiente; ArgentinaFil: Romero, H.. No especifíca;Fil: Santos, E.. No especifíca;Fil: Zunino, P.. Instituto de Investigaciones Biológicas "Clemente Estable"; UruguayFil: Antúnez, Karina. Instituto de Investigaciones Biológicas "Clemente Estable"; Urugua
Dissolved organic nitrogen production and export by meridional overturning in the eastern subpolar North Atlantic
Research articleDissolved organic matter (DOM) is produced in the surface and exported towards the
deep ocean, adding ∼ 2 PgC/year to the global carbon export. Due to its central role in the Meridional
Overturning Circulation, the eastern subpolar North Atlantic (eSPNA) contributes largely to this export.
Here we quantify the transport and budget of dissolved organic nitrogen (DON) in the eSPNA, in a
box delimited by the OVIDE 2002 section and the Greenland-Iceland-Scotland sills. The Meridional
Overturning Circulation exports >15.9 TgN/year of DON downward and, contrary to the extended view
that these are materials of subtropical origin, up to 33% of the vertical flux derives from a net local DON
production of 7.1 ± 2.6 TgN/year. The low C:N molar ratio of DOM production (7.4 ± 4.1) and the relatively
short transit times in the eSPNA (3 ± 1 year) suggest that local biogeochemical transformations result in
the injection of fresh bioavailable DOM to the deep ocean.Versión del editor3,79
Revisiting the European sovereign bonds with a permutation-information-theory approach
In this paper we study the evolution of the informational efficiency in its weak form for seventeen European sovereign bonds time series. We aim to assess the impact of two specific economic situations in the hypothetical random behavior of these time series: the establishment of a common currency and a wide and deep financial crisis. In order to evaluate the informational efficiency we use permutation quantifiers derived from information theory. Specifically, time series are ranked according to two metrics that measure the intrinsic structure of their correlations: permutation entropy and permutation statistical complexity. These measures provide the rectangular coordinates of the complexity-entropy causality plane; the planar location of the time series in this representation space reveals the degree of informational efficiency. According to our results, the currency union contributed to homogenize the stochastic characteristics of the time series and produced synchronization in the random behavior of them. Additionally, the 2008 financial crisis uncovered differences within the apparently homogeneous European sovereign markets and revealed country-specific characteristics that were partially hidden during the monetary union heyday.Centro de Investigaciones Óptica
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