Escuela de aficionados. Lectores y letras de molde en la cultura emergente de 1900

Desde comienzos del siglo XX se hace evidente el interés por la cultura artística en el público masivo, lo que origina aspiraciones contrastantes con la escasez de capital simbólico de la que partían. La revista rioplatense Caras y Caretas alimentó ese interés, poniendo en circulación multitud de textos e imágenes y dio lugar a un imaginario de visibilidad en el cual era posible pasar del consumo a la producción cultural. El artículo analiza ese fenómeno a partir de textos y dibujos de colaboradores inexpertos.

La fotografía como prueba de la realidad vs. lo real infotografiable : La crítica de François Soulages a Roland Barthes

Fil: Carrera Aizpitarte, Luciana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Escuela de aficionados. Lectores y letras de molde en la cultura emergente de 1900

Desde comienzos del siglo XX se hace evidente el interés por la cultura artística en el público masivo, lo que origina aspiraciones contrastantes con la escasez de capital simbólico de la que partían. La revista rioplatense Caras y Caretas alimentó ese interés, poniendo en circulación multitud de textos e imágenes y dio lugar a un imaginario de visibilidad en el cual era posible pasar del consumo a la producción cultural. El artículo analiza ese fenómeno a partir de textos y dibujos de colaboradores inexpertos.

La construcción de comunidades políticas en el Río de La Plata : Tucumán, Catamarca y Santiago del Estero entre 1810-1838

Fil: Iramain, Pablo Sebastián. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

La fotografía como prueba de la realidad vs. lo real infotografiable : La crítica de François Soulages a Roland Barthes

Fil: Carrera Aizpitarte, Luciana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Downwelling solar irradiance, upwelling solar radiance, sky leaving radiance, and cloud cover observed during ARCHEMHAB study (on Maria S. Merian Leg MSM21/3) from 2012-07-26 to 2012-08-10

The need to obtain ocean color essential climate variables (OC-ECVs) using hyperspectral technology has gained increased interest in recent years. Assessing ocean color on a large scale in high latitude environments using satellite remote sensing is constrained by polar environmental conditions. Nevertheless, on a small scale we can assess ocean color using above-water and in-water remote sensing. Unfortunately, above-water remote sensing can only determine apparent optical properties leaving the sea surface and is susceptible to near surface environmental conditions for example sky and sunglint. Consequently, we have to rely on accurate in-water remote sensing as it can provide both synoptic inherent and apparent optical properties of seawater. We use normalized water leaving radiance LWN or the equivalent remote sensing reflectance RRS from 27 stations to compare the differences in above-water and in-water OC-ECVs. Analysis of above-water and in-water RRS spectra provided very good match-ups (R2 > 0.97, MSE<1.8*10**-7) for all stations. The unbiased percent differences (UPD) between above-water and in-water approaches were determined at common OC-ECVs spectral bands (410, 440, 490, 510 and 555) nm and the classic band ratio (490/555) nm. The spectral average UPD ranged (5 - 110) % and band ratio UPD ranged (0 - 12) %, the latter showing that the 5% uncertainty threshold for ocean color radiometric products is attainable. UPD analysis of these stations West of Greenland, Labrador Sea, Denmark Strait and West of Iceland also suggests that the differences observed are likely a result of environmental and instrumental perturbations.

(Table 1) Uncompacted and compacted sedimentation rate values corrected for bedding attitudes at DSDP Leg 66 Holes

Sediment accumulation rates, computed using agesediment thickness curves obtained from DSDP cores, are rarely corrected for compaction or bedding attitude to better approximate true sediment accumulation rates (c.f. van Andel et al., 1975; Davies et al., 1977; and Whitman and Davies, 1979). Variations with depth in either of these factors can hinder interpreting relative rates of sedimentary processes associated with a particular depositional environment. This problem becomes particularly relevant for convergent margin sediments, which often display variable bedding attitudes and pronounced changes in porosity, bulk density, and other parameters related to the compaction process at shallow depth. These rapid shallow changes render correlation of sedimentation rates within a single transect of holes very difficult. Two techniques have been applied to data collected from a transect of holes along the southwestern Mexico continental margin, DSDP Leg 66 (Fig. 1), to correct sediment accumulation rates for variations in compaction and bedding attitude. These corrections should help resolve true fluctuations in accumulation rates and their implications regarding convergent margin processes.