El Chaco en Buenos Aires : Entre la identidad y el desplazamiento

Este trabajo introduce el tema de las poblaciones indígenas migrantes a Buenos Aires y los efectos que esto causa en múltiples niveles de la vida social. En primer término, en el imaginario de los habitantes de la ciudad, para quienes la presencia de "indios" parece un contrasentido histórico, según la posición dominante en Buenos Aires en términos políticos, económicos y simbólicos. En segundo lugar, la llegada de aborígenes chaqueños plantea un desplazamiento que provoca una nueva tensión espacial Chaco-Buenos Aires en los mismos aborígenes, quienes se reconstituyen en el nuevo sitio, incorporando elementos nuevos a su estructura identitaria. Finalmente, la presencia toba en la ciudad desafía los planteos de la etnografía chaqueña clásica, orientada hacia universos culturales territorialmente circunscriptos. La presencia toba en Buenos Aires se conjuga con la llegada de migrantes de origen indígena de otras regiones del país, los cuales reclaman una visibilidad colectiva nunca antes vista en la metrópoli. Estos procesos se conectan con fenómenos globales que tienen relación con el rol del estado moderno, y el de la sociedad política y sociedad civil, y los umbrales de legitimación que cada uno detenta hoy díaThis paper introduces the issue of migrant indigenous populations into Buenos Aires, and its effects on multiple levels of social life. Firstly, on the imaginary conceptions of the city's inhabitants, for whom the presence of "indios" seems like an historic contradiction, according to Buenos Aires City dominant position in political, economic and symbolic terms. Secondly, the arrival of native people from the Chaco province sets forth the displacement which, in turn, causes new Chaco-Buenos Aires spatial tension! in those same individuals, who reconstruct a new site by including new elements of their identity structure. Finally, the presence of Tobas in the city defies traditional Chaco ethnography statements oriented towards territorially circumscript cultural universes. The Toba presence in Buenos Aires is added to the arrival of native groups migrating from other regions of the country; and all of them claim a collective visibility never seen before in the metropolis. These processes connect with global phenomena related to the role of the modern state, to the political and civil society, and to the threshold of legitimation each one currently hasSociedad Argentina de Antropologí

El Chaco en Buenos Aires : Entre la identidad y el desplazamiento

Este trabajo introduce el tema de las poblaciones indígenas migrantes a Buenos Aires y los efectos que esto causa en múltiples niveles de la vida social. En primer término, en el imaginario de los habitantes de la ciudad, para quienes la presencia de "indios" parece un contrasentido histórico, según la posición dominante en Buenos Aires en términos políticos, económicos y simbólicos. En segundo lugar, la llegada de aborígenes chaqueños plantea un desplazamiento que provoca una nueva tensión espacial Chaco-Buenos Aires en los mismos aborígenes, quienes se reconstituyen en el nuevo sitio, incorporando elementos nuevos a su estructura identitaria. Finalmente, la presencia toba en la ciudad desafía los planteos de la etnografía chaqueña clásica, orientada hacia universos culturales territorialmente circunscriptos. La presencia toba en Buenos Aires se conjuga con la llegada de migrantes de origen indígena de otras regiones del país, los cuales reclaman una visibilidad colectiva nunca antes vista en la metrópoli. Estos procesos se conectan con fenómenos globales que tienen relación con el rol del estado moderno, y el de la sociedad política y sociedad civil, y los umbrales de legitimación que cada uno detenta hoy díaThis paper introduces the issue of migrant indigenous populations into Buenos Aires, and its effects on multiple levels of social life. Firstly, on the imaginary conceptions of the city's inhabitants, for whom the presence of "indios" seems like an historic contradiction, according to Buenos Aires City dominant position in political, economic and symbolic terms. Secondly, the arrival of native people from the Chaco province sets forth the displacement which, in turn, causes new Chaco-Buenos Aires spatial tension! in those same individuals, who reconstruct a new site by including new elements of their identity structure. Finally, the presence of Tobas in the city defies traditional Chaco ethnography statements oriented towards territorially circumscript cultural universes. The Toba presence in Buenos Aires is added to the arrival of native groups migrating from other regions of the country; and all of them claim a collective visibility never seen before in the metropolis. These processes connect with global phenomena related to the role of the modern state, to the political and civil society, and to the threshold of legitimation each one currently hasSociedad Argentina de Antropologí

Antropología simbólica: pasado y presente

Este trabajo es básicamente una bibliografía anotada, organizada por una línea temporal que cubre las características históricas y conceptuales principales de lo que se ha dado en llamar antropología simbólica en la tradición disciplinar. Como homenaje al 70º aniversario de la revista Relaciones elegimos dos momentos de la historia de la antropología, los años 1936 y 2008, dentro de los cuales se identificaron problemas, ideas, preguntas, y circunstancias políticas centrales de autores relacionados, directa o indirectamente, con una visión de la vida social como acción simbólica. Esta breve etnografía de la episteme antropológica presenta este campo como amplio y proteico, ilustrando también los núcleos y las agendas de investigación más remarcables de los trabajos actuales, en Argentina y en la academia internacional, influidos por un modo de ver la condición humana como una aventura a través de símbolos y significados, social e históricamente situados.This paper is basically an annotated bibliography shaped by a chronological line, which covers historical and conceptual features of what has been called Symbolic Anthropology in the discipline’s tradition. To honor the 70th anniversary of the journal Relaciones, we choose two moments of the history of Anthropology, 1936 and 2008, within which we identified main ideas, problems, questions, and political issues of authors and works approaching social life as symbolic action. This brief ethnography of the anthropological episteme portrays this field as wide and protean. It illustrates also main concerns and research agendas of current work, both in Argentine and international scholarship, influenced by this way of seeing human condition as an adventure through historically and socially situated symbols and meanings.Sociedad Argentina de Antropologí

TMEM95 is a sperm membrane protein essential for mammalian fertilization.

The fusion of gamete membranes during fertilization is an essential process for sexual reproduction. Despite its importance, only three proteins are known to be indispensable for sperm-egg membrane fusion: the sperm proteins IZUMO1 and SPACA6, and the egg protein JUNO. Here we demonstrate that another sperm protein, TMEM95, is necessary for sperm-egg interaction. TMEM95 ablation in mice caused complete male-specific infertility. Sperm lacking this protein were morphologically normal exhibited normal motility, and could penetrate the zona pellucida and bind to the oolemma. However, once bound to the oolemma, TMEM95-deficient sperm were unable to fuse with the egg membrane or penetrate into the ooplasm, and fertilization could only be achieved by mechanical injection of one sperm into the ooplasm, thereby bypassing membrane fusion. These data demonstrate that TMEM95 is essential for mammalian fertilization. © 2020, Lamas-Toranzo et al

Service provision and barriers to care for homeless people with mental health problems across 14 European capital cities

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Possible Fruit Protein Effects on Primate Communities in Madagascar and the Neotropics

The ecological factors contributing to the evolution of tropical vertebrate communities are still poorly understood. Primate communities of the tropical Americas have fewer folivorous but more frugivorous genera than tropical regions of the Old World and especially many more frugivorous genera than Madagascar. Reasons for this phenomenon are largely unexplored. We developed the hypothesis that Neotropical fruits have higher protein concentrations than fruits from Madagascar and that the higher representation of frugivorous genera in the Neotropics is linked to high protein concentrations in fruits. Low fruit protein concentrations in Madagascar would restrict the evolution of frugivores in Malagasy communities.We reviewed the literature for nitrogen concentrations in fruits from the Neotropics and from Madagascar, and analyzed fruits from an additional six sites in the Neotropics and six sites in Madagascar. Fruits from the Neotropical sites contain significantly more nitrogen than fruits from the Madagascar sites. Nitrogen concentrations in New World fruits are above the concentrations to satisfy nitrogen requirements of primates, while they are at the lower end or below the concentrations to cover primate protein needs in Madagascar.Fruits at most sites in the Neotropics contain enough protein to satisfy the protein needs of primates. Thus, selection pressure to develop new adaptations for foods that are difficult to digest (such as leaves) may have been lower in the Neotropics than in Madagascar. The low nitrogen concentrations in fruits from Madagascar may contribute to the almost complete absence of frugivorous primate species on this island

A dense mini-Neptune orbiting the bright young star HD 18599

© 2022 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1093/mnras/stac2845Very little is known about the young planet population because the detection of small planets orbiting young stars is obscured by the effects of stellar activity and fast rotation which mask planets within radial velocity and transit data sets. The few planets that have been discovered in young clusters generally orbit stars too faint for any detailed follow-up analysis. Here we present the characterization of a new mini-Neptune planet orbiting the bright (V=9) and nearby K2 dwarf star, HD 18599. The planet candidate was originally detected in TESS light curves from Sectors 2, 3, 29, and 30, with an orbital period of 4.138~days. We then used HARPS and FEROS radial velocities, to find the companion mass to be 25.5$\pm$4.6~M$_\oplus$. When we combine this with the measured radius from TESS, of 2.70$\pm$0.05~R$_\oplus$, we find a high planetary density of 7.1$\pm$1.4~g cm$^{-3}$. The planet exists on the edge of the Neptune Desert and is the first young planet (300 Myr) of its type to inhabit this region. Structure models argue for a bulk composition to consist of 23% H$_2$O and 77% Rock and Iron. Future follow-up with large ground- and space-based telescopes can enable us to begin to understand in detail the characteristics of young Neptunes in the galaxy.Peer reviewe

Measurement of the Lifetime Difference Between B_s Mass Eigenstates

We present measurements of the lifetimes and polarization amplitudes for B_s --> J/psi phi and B_d --> J/psi K*0 decays. Lifetimes of the heavy (H) and light (L) mass eigenstates in the B_s system are separately measured for the first time by determining the relative contributions of amplitudes with definite CP as a function of the decay time. Using 203 +/- 15 B_s decays, we obtain tau_L = (1.05 +{0.16}/-{0.13} +/- 0.02) ps and tau_H = (2.07 +{0.58}/-{0.46} +/- 0.03) ps. Expressed in terms of the difference DeltaGamma_s and average Gamma_s, of the decay rates of the two eigenstates, the results are DeltaGamma_s/Gamma_s = (65 +{25}/-{33} +/- 1)%, and DeltaGamma_s = (0.47 +{0.19}/-{0.24} +/- 0.01) inverse ps.Comment: 8 pages, 3 figures, 2 tables; as published in Physical Review Letters on 16 March 2005; revisions are for length and typesetting only, no changes in results or conclusion

Peer norm guesses and self-reported attitudes towards performance-related pay

Due to a variety of reasons, people see themselves differently from how they see others. This basic asymmetry has broad consequences. It leads people to judge themselves and their own behavior differently from how they judge others and others’ behavior. This research, first, studies the perceptions and attitudes of Greek Public Sector employees towards the introduction of Performance-Related Pay (PRP) systems trying to reveal whether there is a divergence between individual attitudes and guesses on peers’ attitudes. Secondly, it is investigated whether divergence between own self-reported and peer norm guesses could mediate the acceptance of the aforementioned implementation once job status has been controlled for. This study uses a unique questionnaire of 520 observations which was designed to address the questions outlined in the preceding lines. Our econometric results indicate that workers have heterogeneous attitudes and hold heterogeneous beliefs on others’ expectations regarding a successful implementation of PRP. Specifically, individual perceptions are less skeptical towards PRP than are beliefs on others’ attitudes. Additionally, we found that managers are significantly more optimistic than lower rank employees regarding the expected success of PRP systems in their jobs. However, they both expect their peers to be more negative than they themselves are