Lithic projectile point from the salado river microregion (Buenos Aires, Argentina). design and life histories

En este trabajo se presenta el análisis de quince cabezales líticos enteros y fracturados que fueron recuperados a partir de excavaciones, sondeos y recolecciones superficiales en cinco sitios de la microrregión del río Salado. Estas piezas constituyen la totalidad de cabezales líticos recuperados en el área, por lo que el conjunto puede considerarse representativo. Las ocupaciones fueron fechadas en el Holoceno tardío. El estudio de la biografía de estos artefactos permitió inferir aspectos relacionados con la selección de rocas, las secuencias de manufactura, el tipo de fracturas, el uso, el mantenimiento, el descarte y los procesos posdepositacionales. Se pudieron reconocer dos diseños básicos y las formas mantenidas y transformadas, lo que permitiría proponer la presencia de los dos sistemas de armas con puntas penetrantes: puntas de flecha propulsadas por arco y puntas de armas de mano. Estas pudieron utilizarse para obtener, a través de distintas estrategias de caza, los diferentes tipos de recursos faunísticos presentes en los sitios. Finalmente, se incluyen aspectos de la biografía extendida de estos artefactos relacionados con su uso en el presente.This paper analyzes fifteen lithic projectile points, both complete and fractured, recovered from different excavations, surveys and surface collection carried out in five archaeological sites in the micro-region of the Salado river. These occupations are dated back to the late Holocene period. The study of the biography of these artifacts led us to infer different aspects related to rock selection, manufacturing sequences, types of fracture, use, maintenance, discard, and postdepositional processes. In this way, we were able to differentiate two types of weapons among the basic, maintained and transformed designs: lithic arrow points and hand-held weapon points. They could have been used to obtain a variety of animal resources found in situ employing different types of hunting strategies. Finally, we include aspects of the extended life history of these artifacts as they relate to their contemporary use.Fil: Vigna, Mariana Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Arqueología; ArgentinaFil: Gonzalez de Bonaveri, Maria Isabel. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Weitzel, María Celeste. Provincia de Buenos Aires. Municipalidad de Necochea. Museo de Ciencias Naturales de Necochea. Area de Arqueología y Antropología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Artistas sobre outras obras

Sobre arte e viagem pode-se estabelecer um paralelo continuado, irónico, expressivo. Entre as duas, a síntese do signo, a justaposição associativa. A viagem mostra o mundo, a viagem mostra quem somos. A caminho se desenha, se imagina, se fantasia, se mente. Neste ensejo, e neste mote da descoberta, se apreentam os 16 artigos que compõem o número 26 da revista Estúdio.info:eu-repo/semantics/publishedVersio

Poly(methyloctylsiloxane) Immobilized On Silica As A Sorbent For Solid-phase Extraction Of Some Pesticides.

A laboratory-made sorbent for solid-phase extraction (SPE) was obtained by thermal immobilization of poly(methyloctylsiloxane) (PMOS) onto silica. Cartridges packed with the new sorbent were used for the simultaneous determination of imazethapyr, nicosulfuron, diuron, linuron and chlorimuron-ethyl in water. These pesticides were separated and quantified using high-performance liquid chromatography with diode array detection (HPLC-DAD). The recoveries achieved with the laboratory-made PMOS cartridges were compared with those of some commercially available silica-based and polymer-based cartridges having C18, C8 and NH(2) pendant groups. Method validation using the laboratory-made sorbent was performed for the five pesticides at three fortifications levels (1x, 2x and 10x the limit of quantification of each pesticide). The laboratory-made PMOS cartridge has low cost preparation and showed good recoveries (72-111%) for all pesticides. Repeatability and intermediate precision were lower than 15%. Its performance was similar or even better, in some cases, than those of the commercial cartridges.1114211-

¿Cómo pensamos las desigualdades, pobrezas y exclusiones sociales en América Latina? : luchas, resistencias y actores emergentes

En este libro, nos proponemos presentar aportes teóricos y metodológicos productos de investigaciones y reflexiones de cientistas sociales latinoamericanos, que permitan el análisis crítico y profundo sobre los procesos que conducen a que América Latina sea el continente con más desigualdad, con elevados índices de pobreza, y con importantes problemas de integración social. La descripción de diferentes formas de desigualdad y de procesos de exclusión social, la reflexión te.rica y metodológica sobre estos conceptos, el análisis sobre las acciones y los fundamentos de los diferentes Estados o actores sociales para resistirse y enfrentarse a estas problemáticas guiará el contenido de la publicación

Association of neighbourhood disadvantage and individual socioeconomic position with all-cause mortality: a longitudinal multicohort analysis

International audienceBackground: Few studies have examined the interactions between individual socioeconomic position and neighbourhood deprivation and the findings so far are heterogeneous. Using a large sample of diverse cohorts, we investigated the interaction effect of neighbourhood socioeconomic deprivation and individual socioeconomic position, assessed using education, on mortality.Methods: We did a longitudinal multicohort analysis that included six cohort studies participating in the European LIFEPATH consortium: the CoLaus (Lausanne, Switzerland), E3N (France), EPIC-Turin (Turin, Italy), EPIPorto (Porto, Portugal), Melbourne Collaborative Cohort Study (Melbourne, VIC, Australia), and Whitehall II (London, UK) cohorts. All participants with data on mortality, educational attainment, and neighbourhood deprivation were included in the present study. The data sources were the databases of each cohort study. Poisson regression was used to estimate the mortality rates and associations (relative risk, 95% CIs) with neighbourhood deprivation (Q1 being least deprived to Q5 being the most deprived). Baseline educational attainment was used as an indicator of individual socioeconomic position. Estimates were combined using pooled analysis and the relative excess risk due to the interaction was computed to identify additive interactions.Findings: The cohorts comprised a total population of 168 801 individuals. The recruitment dates were 2003-06 for CoLaus, 1989-91 for E3N, 1992-98 for EPIC-Turin, 1999-2003 for EPIPorto, 1990-94 for MCCS, and 1991-94 for Whitehall II. We use baseline data only and mortality data obtained using record linkage. Age-adjusted mortality rates were higher among participants residing in more deprived neighbourhoods than those in the least deprived neighbourhoods (Q1 least deprived neighbourhoods, 369·7 per 100 000 person-years [95% CI 356·4-383·2] vs Q5-most deprived neighbourhoods 445·7 per 100 000 person-years [430·2-461·7]), but the magnitude of the association varied according to educational attainment (relative excess risk due to interaction=0·18, 95% CI 0·08-0·28). The relative risk for Q5 versus Q1 was 1·31 (1·23-1·40) among individuals with primary education or less, but less pronounced among those with secondary education (1·12; 1·04-1·21) and tertiary education (1·16; 1·07-1·27). Associations remained after adjustment for individual-level factors, such as smoking, physical activity, and alcohol intake, among others.Interpretation: Our study suggests that the detrimental health effect of living in disadvantaged neighbourhoods is more pronounced among individuals with low education attainment, amplifying social inequalities in health. This finding is relevant to policies aimed at reducing health inequalities, suggesting that these issues should be addressed at both the individual level and the community level.Funding: The European Commission, European Regional Development Fund, the Portugese Foundation for Science and Technology