Introduction to disaster epidemiology for public health personnel

There has been a renewed interest in disaster epidemiology after the World Trade Center and Pentagon terrorist attacks of 2001, the devastation of Hurricane Katrina and the overwhelming loss of life that resulted from the tsunami that originated in the Indian Ocean and struck Indonesia and other adjacent countries on December 26, 2004. Institutions that have accepted the challenge of training the next generation of public health professionals as well as to continue the education of the dedicated professionals already serving in public health fields have a responsibility to train practitioners in the basic principles of disaster epidemiology as well as in practical applications of these principles. This culminating experience project involved developing an on-line course complete with the background information as well as relevant case studies that can be used as a curriculum for an introductory course in disaster epidemiology. ^

Tendencia lógica después de Vaz Ferreira

Después de que Carlos Vaz Ferreira inaugurara en el Uruguay una nueva forma de hacer filosofía, hacia 1910, fecha de publicación de su Lógica viva, un puñado de profesores, filósofos y pensadores, discípulos o seguidores de la generación siguiente, se sintió fuertemente atraído por el fervor de una nueva lógica naciente. Este fervor, por otra parte, atrapaba a los filósofos europeos en la misma época.

Crítica y poesía. Elementos para una tradición

Este ensayo estudia las operaciones epistemológicas actuantes en la crítica argentina contemporánea de poesía, tomando en cuenta el estatuto teórico-filosófico de su discurso. Para ello, postula una tradición emergente en las últimas décadas del siglo XX, desde la constitución de un texto fundacional: el ensayo de Noé Jitrik titulado "Alturas de Machu Picchu. Una marcha piramidal a través de un discurso poético incesante". Posteriormente, se muestra en dos críticos destacados de una promoción posterior -Cristina Piña y Daniel Freidemberg- la coexistencia de tendencias opuestas en las elecciones estéticas, propias de las poéticas de los años sesenta y prolongadas hasta los ochenta, pero con la común característica del productivo procesamiento de la moderna teoría literaria.

Crítica y poesía. Elementos para una tradición

Este ensayo estudia las operaciones epistemológicas actuantes en la crítica argentina contemporánea de poesía, tomando en cuenta el estatuto teórico-filosófico de su discurso. Para ello, postula una tradición emergente en las últimas décadas del siglo XX, desde la constitución de un texto fundacional: el ensayo de Noé Jitrik titulado "Alturas de Machu Picchu. Una marcha piramidal a través de un discurso poético incesante". Posteriormente, se muestra en dos críticos destacados de una promoción posterior -Cristina Piña y Daniel Freidemberg- la coexistencia de tendencias opuestas en las elecciones estéticas, propias de las poéticas de los años sesenta y prolongadas hasta los ochenta, pero con la común característica del productivo procesamiento de la moderna teoría literaria.

Crítica y poesía. Elementos para una tradición

Este ensayo estudia las operaciones epistemológicas actuantes en la crítica argentina contemporánea de poesía, tomando en cuenta el estatuto teórico-filosófico de su discurso. Para ello, postula una tradición emergente en las últimas décadas del siglo XX, desde la constitución de un texto fundacional: el ensayo de Noé Jitrik titulado "Alturas de Machu Picchu. Una marcha piramidal a través de un discurso poético incesante". Posteriormente, se muestra en dos críticos destacados de una promoción posterior -Cristina Piña y Daniel Freidemberg- la coexistencia de tendencias opuestas en las elecciones estéticas, propias de las poéticas de los años sesenta y prolongadas hasta los ochenta, pero con la común característica del productivo procesamiento de la moderna teoría literaria.

Mid-Miocene planktonic foraminifera of the Kerguelen Plateau, Antarctica

Miocene deep-sea sediments from ODP Site 744 (Kerguelen Plateau, southern Indian Ocean) contain abundant and diverse planktonic foraminiferal assemblages. Their analysis led to the identification of the interval between 17.0 and 14.2 Ma as a time of mid-Miocene warmth, which is investigated here in detail. This investigation includes reconstruction of trends in foraminiferal faunal composition and diversity through time, as well as in morphology and coiling direction within Globorotalia praescitula and Globorotalia zealandica plexi. These two large-globorotaliid plexi constitute the most characteristic component of the mid-Miocene foraminiferal faunas at ODP Site 744. Selected benthic (Cibicidoides sp.) and planktonic foraminifera were also analyzed for delta18O and delta13C ratios. Distinctive planktonic assemblages were the basis for identification of three foraminiferal biofacies between 17.0 and 14.2 Ma. The most prominent faunal changes took place between Biofacies 2 and 3 (15.5-15.0 Ma). Six of 11 macroperforate planktonic foraminifera from the >150-µm size fraction occur principally within Biofacies 3. Three other taxa are present throughout the interval analyzed. Moreover, both aforementioned globorotaliid plexi exhibit an increase in morphological diversity between Biofacies 2 and 3. Within the same interval, the G. zealandica plexus shows a switch from random coiling (50% sinistral) to clearly sinistral-dominated coiling. The faunal changes recognized are interpreted as the result of foraminiferal immigrations (increase in faunal diversity) and evolutionary trends (increase in morphological variability and change in coiling mode among the globorotaliid plexi). The stable isotopic results allow paleoenvironmental interpretation of these faunal changes. According to the delta18O values, no significant change in sea-surface temperature occurred between 17.0 and 14.2 Ma. However, the same data suggest an increase in ecological distance between various niches, which is expressed by a rising delta18O gradient recorded between various planktonic taxa upward within the section. This trend suggests niche-space availability as a likely factor responsible for the faunal changes recognized. Changes in the shape and depth of the thermocline, as well as in seasonality and eutrophication are considered as possible causes. Among these an increase in seasonality appears to have been responsible for the increase in species and morphological diversities between 15.5 and 15.0 Ma. The proposed scenario suggests that changes in seasonality may be an important factor driving faunal migrations and evolution. Variable seasonality may also affect the oxygen isotopic record of planktonic foraminiferal taxa.

Solar radiation over and under sea ice at ROV station PS86/081-1 during POLARSTERN cruise PS86 (AURORA) in July 2014

The observed changes in physical properties of sea ice such as decreased thickness and increased melt pond cover severely impact the energy budget of Arctic sea ice. Increased light transmission leads to increased deposition of solar energy in the upper ocean and thus plays a crucial role for amount and timing of sea-ice-melt and under-ice primary production. Recent developments in underwater technology provide new opportunities to study light transmission below the largely inaccessible underside of sea ice. We measured spectral under-ice radiance and irradiance using the new Nereid Under-Ice (NUI) underwater robotic vehicle, during a cruise of the R/V Polarstern to 83°N 6°W in the Arctic Ocean in July 2014. NUI is a next generation hybrid remotely operated vehicle (H-ROV) designed for both remotely piloted and autonomous surveys underneath land-fast and moving sea ice. Here we present results from one of the first comprehensive scientific dives of NUI employing its interdisciplinary sensor suite. We combine under-ice optical measurements with three dimensional under-ice topography (multibeam sonar) and aerial images of the surface conditions. We investigate the influence of spatially varying ice-thickness and surface properties on the spatial variability of light transmittance during summer. Our results show that surface properties such as melt ponds dominate the spatial distribution of the under-ice light field on small scales (<1000 m**2), while sea ice-thickness is the most important predictor for light transmission on larger scales. In addition, we propose the use of an algorithm to obtain histograms of light transmission from distributions of sea ice thickness and surface albedo.