J.S. Bach as a Religious Storyteller – The Second Brandenburg Concerto

The sacred music of Johann Sebastian Bach, written during the composer’s employments at churches in Weimar (1708-17) and Leipzig (1724-50), clearly demonstrates his strong Lutheran faith. However, until relatively recently, Bach’s instrumental works have been considered devoid of religious inspiration, especially those published during his time at the Calvinist court of Prince Leopold in Cöthen (1717-23). With the discovery of Bach’s personal Bible and other Lutheran theological texts that contained annotations underscoring the role of music in bringing glory and praise to God, some contemporary scholars have pushed against the notion of Bach’s instrumental works being purely secular. For example, Michael Marissen, in his groundbreaking 1995 book The Social and Religious Designs of J.S. Bach’s Brandenburg Concertos, demonstrates how the First Concerto represents a Lutheran perspective on social hierarchies. The unusual inclusion of a hunting horn signals the presence of the aristocracy, and Bach’s musical treatment of the hunting horn suggests that the aristocracy is in some ways superfluous to the ensemble but is ultimately necessary to maintain social and musical order. In this project, I argue that the same analytical principles can be productively applied to the Second Brandenburg Concerto, a piece which has not been yet considered in a theological context, and its unique use of the trumpet. Given the instrument’s strong Biblical resonances and its direct association with the Second Coming in Revelations, I show how the trumpet can be considered Bach’s musical embodiment of Christ. The concerto begins with all parts in unison as Christ was born in the same humble manner as man. The trumpet is absent in the somber second movement, symbolizing Christ’s death, but returns triumphantly in the third movement, announcing a melody that is then repeated by the other instruments, as the teachings of Christ are shared through his followers. The Second Brandenburg Concerto was never intended for performance in church, but by applying Marissen’s method of analyzing Bach’s instrumental compositions, we discover that the piece may nonetheless have been heard as a musical retelling of the Easter Story

Upwelling regime off the Cabo Frio region in Brazil and impact on acoustic propagation

This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment. (C) 2018 Acoustical Society of AmericaBrazilian Navy; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)/Ciencias Sem Fronteiras [400671/2014-0]; European Union [OAEX-230855]; Fundacao de Amparo a Pesquisa (FAPERJ) [E-26/110.327/2012

The importance of the Scotia Sea on the outflow of Weddell Sea Deep Water

Weddell Sea Deep Water influences the thermohaline circulation of the world ocean directly as a component of the deep western boundary current in the South Atlantic Ocean and indirectly by cooling and freshening Circumpolar Deep Water. Because it is filled with recently ventilated Weddell Sea Deep Water, the Scotia Sea is important to both influences. The main component of the abyssal waters renewing most of the world oceans via deep boundary currents is the Circumpolar Deep Water of the Antarctic Circumpolar Current. Weddell Sea Deep Water is recognized as the main source of cold, fresh waters to Circumpolar Deep Water, and we show that Weddell Sea Deep Water is incorporated into the Antarctic Circumpolar Current within the Scotia Sea. As a result of this ventilation, the Scotia Sea provides an effective link between the deep waters of the Weddell Sea and the rest of the world abyssal ocean. Some of the Weddell Sea Deep Water filling the Scotia Sea leaves as a westward flow via the southern Drake Passage. Weddell Sea Deep Water also enters the Georgia Basin directly from the Scotia Sea and flows beneath the Antarctic Circumpolar Current to contribute to the deep western boundary current of the Argentine Basin. In most previous studies, a deep spreading route from the Weddell Sea over the South Sandwich Trench east of the Scotia Sea had been considered the only source of Weddell Sea Deep Water for this deep western boundary current

Argo real-time quality control intercomparison

The real-time quality control (RTQC) methods applied to Argo profiling float data by the United Kingdom (UK) Met Office, the United States (US) Fleet Numerical Meteorology and Oceanography Centre, the Australian Bureau of Meteorology and the Coriolis Centre are compared and contrasted. Data are taken from the period 2007 to 2011 inclusive and RTQC performance is assessed with respect to Argo delayed-mode quality control (DMQC). An intercomparison of RTQC techniques is performed using a common data set of profiles from 2010 and 2011. The RTQC systems are found to have similar power in identifying faulty Argo profiles but to vary widely in the number of good profiles incorrectly rejected. The efficacy of individual QC tests are inferred from the results of the intercomparison. Techniques to increase QC performance are discussed

Educación para la Salud en la formación inicial del Profesorado en Ciencias Naturales : Una mirada exploratoria...un desafío por asumir

El presente trabajo pretende, en nuestro contexto particular, iniciar un proceso de indagación y sistematización en torno a las competencias específicas que deben educarse en la formación inicial del profesorado en ciencias naturales para promover un salto cualitativo en la Educación para la Salud que reciben los adolescentes y jóvenes en la Educación Secundaria. Para ello relevamos algunas de la actividades típicas que habitualmente se le proponen al alumnado en Salud y Adolescencia (Espacio Curricular del 1º año de la Educación Polimodal Bonaerense). Paralelamente trabajamos con los preconceptos en torno a la salud de los alumnos/as de la Formación Docente, para intentar un análisis conjunto de los resultados que nos permita detectar las competencias genéricas y específicas necesarias para superar la situación de partida.Trabajos del área Ciencias NaturalesDepartamento de Ciencias Exactas y Naturale

The cost-effectiveness of long-term antiviral therapy in the management of HBeAg-positive and HBeAg-negative chronic hepatitis B in Singapore

The purpose of this study was the economic evaluation of short-duration treatments of chronic hepatitis B (CHB) and longer duration antiviral treatment for up to 5 years. Two 10-health state Markov models were developed for hepatitis B e antigen (HBeAg)-positive and HBeAg-negative CHB patients respectively. The perspective of this economic evaluation was the Singapore healthcare system and CHB patient. The models followed cohorts of HBeAg-positive and HBeAg-negative CHB patients, respectively, over a period of 40 years, by which time the majority of the cohorts would have died if left untreated. Costs and benefits were discounted at 5% per annum. Annual rates of disease progression and the magnitude of treatment effects were obtained from the literature, with a focus on data obtained in Asian patients and meeting the criteria for therapy as described in internationally recognized management guidelines. Short-course therapy with α-interferon, or 1-year treatment with pegylated interferon α-2a, lamivudine or adefovir had limited impact on disease progression. In contrast, treatment of CHB with antiviral therapy for 5 years substantially decreased the rate of disease progression. Treatment with lamivudine for 1-year is highly cost-effective compared with no treatment of CHB but has limited effect on reducing the rate of disease progression. Compared with 1-year treatment with lamivudine, sequential antiviral therapies for up to 5 years (i.e. lamivudine plus adefovir on emergence of lamivudine resistance or adefovir plus lamivudine on emergence of adefovir resistance) are highly cost-effective by international standards. These conclusions are robust to uncertainties in model inputs and are consistent with the findings of other recently published studies

On the Effects of Increased Vertical Mixing on the Arctic Ocean and Sea Ice

Against the backdrop of Arctic sea ice decline, vertical mixing in the interior Arctic Ocean will most likely change, but it is still unclear how the Arctic Ocean and sea ice will respond. In this paper, a sea ice‐ocean model with a simple parameterization for interior background mixing is used to investigate the Arctic Ocean and sea ice response to a scenario of increased vertical mixing. It is found that more vertical mixing reduces sea ice thickness all year round and decreases summertime sea ice concentration. More vertical mixing leads to a cooling of the Arctic halocline layer and Atlantic Water layer below. The increased vertical mixing speeds up vertical heat and salinity exchange, brings the underlying warm and saline water into the surface layer, and contributes to the sea ice decline. Vertical salinity gradient of the Arctic halocline layer reduces together with a much fresher Atlantic Water layer, and more volume of saline water enters the deep ocean below the Atlantic Water layer. As a result, the reduced Arctic Ocean stratification leads to an adjustment of the circulation pattern. Cyclonic circulation anomalies occur in the surface layer shallower than 20m depth and in the interior ocean deeper than 700m depth, while anticyclonic circulation anomalies occur between these depths. Our study suggests that the extra heat and salinity exchange induced by more vertical mixing will have a noticeable impact on the upper ocean structure, ocean circulation, and sea ice in a changing Arctic Ocean

Chronic hepatitis B - New goals, new treatment

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Effects of Strong Magnetic Fields in Strange Baryonic Matter

We investigate the effects of very strong magnetic fields upon the equation of state of dense bayonic matter in which hyperons are present. In the presence of a magnetic field, the equation of state above nuclear density is significantly affected both by Landau quantization and magnetic moment interactions, but only for field strengths $B>5\times10^{18}$ G. The former tends to soften the EOS and increase proton and lepton abundances, while the latter produces an overall stiffening of the EOS. Each results in a supression of hyperons relative to the field-free case. The structure of a neutron star is, however, primarily determined by the magnetic field stress. We utilize existing general relativistic magneto-hydrostatic calculations to demonstrate that maximum average fields within a stable neutron are limited to values $B\le 1-3 \times10^{18}$ G. This is not large enough to significantly influence particle compositions or the matter pressure, unless fluctuations dominate the average field strengths in the interior or configurations with significantly larger field gradients are considered.Comment: 12 pages, 3 figures. To be submitted to Phys. Lett.

Effects of increased isopycnal diffusivity mimicking the unresolved equatorial intermediate current system in an earth system climate model

Earth system climate models generally underestimate dissolved oxygen concentrations in the deep eastern equatorial Pacific. This problem is associated with the "nutrient trapping" problem, described by Najjar et al. [1992], and is, at least partially, caused by a deficient representation of the Equatorial Intermediate Current System (EICS). Here we emulate the unresolved EICS in the UVic earth system climate model by locally increasing the zonal isopycnal diffusivity. An anisotropic diffusivity of ∼50,000 m 2 s-1 yields an improved global representation of temperature, salinity and oxygen. In addition, it (1) resolves most of the local "nutrient trapping" and associated oxygen deficit in the eastern equatorial Pacific and (2) reduces spurious zonal temperature gradients on isopycnals without affecting other physical metrics such as meridional overturning or air-sea heat fluxes. Finally, climate projections of low-oxygenated waters and associated denitrification change sign and apparently become more plausibl