Self-centering and damping capabilities of a tension-compression device equipped with superelastic NiTi wires Soul, Hugo Ramon; Yawny, Alejandro Andres The hysteretic damping capacity and high recoverable strains characterizing the superelastic response of shape memory alloys (SMA) make these materials attractive for protection systems of structures subjected to dynamic loads. A successful implementation however is conditioned by functional fatigue exhibited by the SMA when subjected to cyclic loading. The residual deformation upon cycling and the efficiency in material usage are the two most restrictive issues in this sense. In this paper, a device equipped with superelastic NiTi SMA wires and capable of supporting external tension compression loads with optimized properties is presented. It is shown how the introduction of the wires' pre-straining allows for the absorption of deleterious residual deformation without affecting the self-centering capabilities upon unloading, in contrast with what occurs for pre-strained tendons. These features were experimentally verified in an in-scale prototype composed of two 1.2 mm diameter superelastic NiTi SMA wires. In order to numerically assess the dynamic response of a simple structure subjected to seismic excitations, a multilinear superelasticity model for the NiTi wires was developed.

Phylogeny of frogs from the genus Physalaemus (Anura, Leptodactylidae) inferred from mitochondrial and nuclear gene sequences Lourenço, Luciana B.; Targueta, Cíntia P.; Baldo, Juan Diego; Nascimento, Juliana; Garcia, Paulo C. A.; Andrade, Gilda V.; Haddad, Célio F. B.; Recco Pimentel, Shirlei M. Although some species groups have been recognized in the leiuperine genusPhysalaemus, no phylogenetic analysis has previously been performed. Here, weprovide a phylogenetic study based on mitochondrial and nuclear DNA sequences from 41 of the 46 species of Physalaemus. We employed the parsimony criterion using the software TNT and POY and the Bayesian criterion using the software MrBayes. Two major clades were recovered inside the monophyletic Physalaemus: i) the highly supported Physalaemus signifer Clade, which included P. nattereri and the species previously placed in the P. deimaticus and P. signifer Groups; and ii) the Physalaemus cuvieri Clade, which included the remaining species of Physalaemus. Five species groups were recognized in the P. cuvieri Clade: the P. biligonigerus Group, the P. cuvieri Group, the P. henselii Group, the P. gracilis Group and the P. olfersii Group. The P. gracilis Species Group was the same as that previously proposed by Nascimento et al. (2005). The P. henselii Group includes P. fernandezae and P. henselii, and was the sister group of a clade that comprised the remaining species of the P. cuvieri Clade. The P. olfersii Group included P. olfersii, P. soaresi, P. maximus, P. feioi and P. lateristriga. The P. biligonigerus Species Group was composed of P. biligonigerus, P. marmoratus, P. santafecinus and P. riograndensis. The P. cuvieri Group inferred here differed from that recognized by Nascimento et al. (2005) only by the inclusion of P. albifrons and the exclusion of P. cicada. The paraphyly of P. cuvieri with respect to P. ephippifer was inferred in all the analyses. Distinct genetic lineages were recognized among individuals currently identified as P. cuvieri and they were congruent with cytogenetic differences reported previously, supporting the hypothesis of occurrence of formally unnamed species.

The need for herbicide use in direct seeding, promotes more sustainable and implementation of integrated systems. Luna, Virginia; Masciarelli, Oscar Alberto; Travaglia, Claudia Noemi; Marchetti, Gisella; Lucero, Martín; Reinoso, Herminda Elmira Technological advances the Argentine has been in recent years such that now stands at the forefront worldwide. The explosion of agriculture, tillage, GM crops and the widespread use of glyphosate have raised controversy, especially regarding the toxicity of the latter. Before weeds are controlled with tillage and these involve serious problems of erosion and soil degradation. Tillage and herbicides have changed the situation and consequently the sustainability of production systems. Glyphosate plays an important role in this transformation, but were allowed to use, would be replaced by more expensive and dangerous herbicides. Under that is essential to achieve these objectives through high yields very tech practice, it is necessary to introduce new technologies to assist the sector mitigation tools and can coexist using those chemicals that may mitigate high exposure to them through technology capabilities to detoxify crops. This tech package is just something known by the scientific-technical and production industry, but that has innovation in its application. The use of PGPR as biofertilizers is a widespread technique that has been installed as a enhancer of crops and environmentally friendly. Our study is based on countering the abuseof chemicals through a complementary technology to mitigate residual glyphosate in crops.

Spatial patterns of mammal occurrence in forest strips surrounded by agricultural crops of the Chaco region, Argentina Núñez Regueiro, Mauricio Manuel; Branch, Lyn Clarke; Fletcher, Robert J.; Marás, Gustavo Arnaldo; Derlindati, Enrique Javier; Tálamo, Andrés Deforestation is a major cause of biodiversity loss, and the predominant factor driving deforestation is expansion of agriculture. A key step toward successful conservation in agricultural areas is maximizing biodiversity value of remaining forest. In subtropical and tropical regions, forest often is left in narrow strips between agricultural fields under the assumption that biodiversity is sustained. We examined use of forest strips and continuous forest by medium and large-sized mammals in Argentine Chaco with camera trapping and hierarchical Bayesian zero-inflated occupancy models and assessed how use related to ecological traits of species. Almost 70% of the species cited for our study area were not detected or were detected in less than 10% of the sampling units. Ten of the 23 species that occurred in the area were absent from strips or were detected most frequently in continuous forest, including all large-bodied species and forest interior specialists. Low occurrence of mammals in strips and in continuous forest raises major concerns related to long-term persistence of mammals in Chaco. Under current development policies, agriculture will continue to expand in this region, further threatening the second largest forest in South America. Alternative configurations for the forest-agriculture landscape, as well as synergism between landscape configuration and other threats, need to be evaluated and incorporated into policy if the rich mammalian fauna of this region is to be conserved.

Global Invader Impact Network (GIIN): Toward standardized evaluation of the ecological impacts of invasive plants Barney, Jacob N.; Tekiela, Daniel R.; Barrios Garcia Moar, Maria Noelia; Dimarco, Romina Daniela; Hufbauer, Ruth A.; Leipzig Scott, Peter; Nuñez, Martin Andres; Pauchard, Aníbal; Pysek, Petr; Vítková, Michaela; Maxwell, Bruce D. Terrestrial invasive plants are a global problem and are becoming ubiquitous components of most ecosystems. They are implicated in altering disturbance regimes, reducing biodiversity, and changing ecosystem function, sometimes in profound and irreversible ways. However, the ecological impacts of most invasive plants have not been studied experimentally, and most research to date focuses on few types of impacts, which can vary greatly among studies. Thus, our knowledge of existing ecological impacts ascribed to invasive plants is surprisingly limited in both breadth and depth. Our aim was to propose a standard methodology for quantifying baseline ecological impact that, in theory, is scalable to any terrestrial plant invader (e.g., annual grasses to trees) and any invaded system (e.g., grassland to forest). The Global Invader Impact Network (GIIN) is a coordinated distributed experiment composed of an observational and manipulative methodology. The protocol consists of a series of plots located in (1) an invaded area; (2) an adjacent removal treatment within the invaded area; and (3) a spatially separate uninvaded area thought to be similar to pre-invasion conditions of the invaded area. A standardized and inexpensive suite of community, soil, and ecosystem metrics are collected allowing broad comparisons among measurements, populations, and species. The method allows for one-time comparisons and for long-term monitoring enabling one to derive information about change due to invasion over time. Invader removal plots will also allow for quantification of legacy effects and their return rates, which will be monitored for several years. GIIN uses a nested hierarchical scale approach encompassing multiple sites, regions, and continents. Currently, GIIN has network members in six countries, with new members encouraged. To date, study species include representatives of annual and perennial grasses; annual and perennial forbs; shrubs; and trees. The goal of the GIIN framework is to create a standard yet flexible platform for understanding the ecological impacts of invasive plants, allowing both individual and synthetic analyses across a range of taxa and ecosystems. If broadly adopted, this standard approach will offer unique insight into the ecological impacts of invasive plants at local, regional, and global scales.

Magnetic Interactions and Energy Barrier Enhancement in Core/Shell Bimagnetic Nanoparticles Lavorato, Gabriel Carlos; Peddis, Davide; Lima, Enio Junior; Troiani, Horacio Esteban; Agostinelli, Elisabetta; Fiorani, Dino; Zysler, Roberto Daniel; Winkler, Elin Lilian In this work, we studied the dynamic and static magnetic properties of ZnO-core/CoFe2O4-shell and CoO-core/CoFe2O4-shell nanoparticles. Both systems are formed by a core of ∼4 nm of diameter encapsulated in a shell of ∼2 nm of thickness. The mean blocking temperature changes from 106(7) to 276(5) K when the core is diamagnetic or antiferromagnetic, respectively. Magnetic remanence studies revealed the presence of weak dipolar interparticle interactions, where Hint is approximately -0.1 kOe for ZnO/CoFe2O4 and -0.9 kOe for CoO/CoFe2O4, playing a minor role in the magnetic behavior of the materials. Relaxation experiments provided evidence that the magnetization reversal process of CoFe2O4 is strongly dependent on the magnetic order of the core. At 10 K, activation volumes of ∼46(6) and ∼69(5) nm3 were found for CoO/CoFe2O4 and ZnO/CoFe2O4 nanoparticles, respectively, corresponding to one-third and one-fifth of the total shell volume. While the magnetic behavior of ZnO/CoFe2O4 nanoparticles is strongly affected by the surface disorder, the exchange coupling at the CoO/CoFe2O4 interface rules the magnetization reversal and the nanoparticles' thermal stability by inducing a larger energy barrier and promoting smaller switching volume.

Personality and alcohol expectancies discriminate alcohol consumption patterns in female college students Pilatti, Angelina; Cupani, Marcos; Pautassi, Ricardo Marcos To characterize patterns of alcohol use in a sample of Argentinean female college students according to personality traits and alcohol expectancies. Methods: Data from 298 female college students (Mage = 18.27 years; SD = 1.37 years) from the city of Cordoba, Argentina were analysed using multinomial regression. Results: Three drinking categories were identified, abstainers, moderate drinkers and regular drinkers with heavy episodic drinking, and these were differentiated by three personality traits [extraversion, disinhibition (DIS) and experience seeking (ES)] and three alcohol expectancies dimensions (sociability, risk/aggression and negative mood). Regular drinkers with heavy episodic drinking and moderate drinkers had, compared to abstainers, higher scores in extroversion and alcohol expectancies for social facilitation, and lower scores in alcohol expectancies for risk and aggression. Regular drinkers with heavy episodic drinking exhibited, compared to moderate drinkers, higher scores in ES, DIS, extroversion, alcohol expectancies for social facilitation and negative mood alcohol expectancies; as well as lower scores in risk and aggression alcohol expectancies. Conclusion: College women in Argentina with problematic alcohol drinking can be distinguished from those drinking moderately.

Fluorinated networks dynamics studied by means of broadband dielectric spectroscopy Miccio, Luis Alejandro; Otegui, Jon; Penoff, Marcela Elisabeth; Montemartini, Pablo Ezequiel; Schwartz, Gustavo A. The influence of the surface chemical modification on the bulk behavior of epoxy based networks has been studied. In particular, the bulk dynamics of epoxy-amine networks modified with fluorinated side chains has been characterized by means of broadband dielectric spectroscopy (BDS), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. The fluorination effect on the structure and dynamics of the materials has been related with the observed changes in both segmental and secondary relaxations. An acceleration of the segmental dynamics as the fluorination degree increases has been clearly observed. As a result, a compromise between fluorine surface enrichment and bulk modification has been proposed for these materials.

NORDIHYDROGUAIARETIC ACID: DUAL BEHAVIOR AS PRO- OR ANTIOXIDANT ON A EUKARYOTIC CELL MODEL (VERO CELLS); Nordihydroguaiaretic acid: Dual behavior as pro- or antioxidant on a eukaryotic cell model (vero cells) Konigheim, Brenda Salome; Aguilar, Juan Javier; Tauro, Laura Beatriz; Rivarola, María Elisa; Contigiani de Minio, Marta Silvia; Núñez Montoya, Susana Carolina Since Nordihydroguaiaretic acid (NDGA), a potent natural antioxidant, can produce oxidation in several cell kinds,mainly by superoxide anion production (O2), the current study was designed to assess its capacity to produce ornot this reactive oxygen species on Vero cell line, with the aim to establish whether this lignan behaves as a pro- orantioxidant. The O2 production was determined by the Nitro Blue Tetrazolium reduction test. Results show that NDGA has a dual-face behavior on this eukaryotic cell model depending on the biological environment and itsconcentration. The NDGA behaved as a pro-oxidant when it was tested single, by means of an increase in O2 production that was directly concentration-dependent. Mixed with an antioxidant (ascorbic acid) or a moderateoxidant (glucose), the NDGA behaved as pro-oxidant at low concentrations and antioxidant at high concentrations.

Freud como lector de Nietzsche. La influencia de Nietzsche en la obra de Freud Drivet, Leandro Este trabajo pretende contribuir a la comprensión de la índole de la influencia del pensamiento nietzscheano en la obra de Freud. Para cumplir con este objetivo se realiza un análisis exhaustivo de los textos de Nietzsche y de Freud, se analizan las respectivas biografías, y se revisa la bibliografía especializada en los vínculos entre ambos autores. Con base en las evidencias recogidas, el artículo concluye formulando una reflexión que elabora la compleja relación de Freud con Nietzsche bajo el concepto de lo ominoso, concepto clave para comprender la historia y la deriva del pensamiento freudiano; This article aims to contribute to the understanding of the nature of the influence of Nietzsche’s thought in the work of Freud. To meet this objective a thorough analysis of the texts of Nietzsche and Freud is done, the respective biographies are examined and the specialized bibliography about the links between the two authors is reviewed. Based on the evidence gathered, we conclude with a reflection that deals with the complex relationship of Freud to Nietzsche from the concept of the abominable, which is key to understand the history and drift of Freudian thought.

Representaciones de género y juventud en el discurso radiofónico: Andro-Hetero-Sexismo Comunicacional Mediatizado sobre las y los jóvenes; Representations of gender and youth in the radio address : andro-heteromediated on communicative sexism and youth Morales, Paula Alicia Este artículo presenta un enfoque de investigación sociodiscursiva aplicada a los medios de comunicación. La metodología de análisis es de carácter cualitativa y se inscribe en la intersección entre los Estudios de Género, los Estudios de Juventud, y los de Comunicación, para analizar los modos de aparición de lo juvenil, desde las condiciones de enunciación de un medio muy poco estudiado: la radio. En el mismo nos proponemos entender las particulares modalizaciones que ejercen los medios de comunicación (en particular la radio) sobre las representaciones juveniles —desde una perspectiva de género—, entendiendo la juventud como una dimensión particular de análisis en esta red semiótica de violencias mediáticas, mediante un análisis del discurso radiofónico emitido por Radio LV3 y Radio Nacional Córdoba durante las segundas mañanas (8 a 12 hs) del 21 de septiembre de 2011 (“Día del Estudiante” y “Día de la Primavera”).; This paper presents an approach to applied research sociodiscursiva media. The analysis methodology is qualitative in nature and it´s part of the intersection between gender studies, Youth Studies, and Communication, to discuss ways of developing the youth, since the conditions of enunciation of an average little studied: the radio. In the same we intend to understand the modalizations individuals exercising the media (especially radio) on youth representation –from the perspective of genre–, understanding youth as a particular dimension of this semiotic analysis of media violence network , by analyzing the radio speech broadcast by Radio National Radio LV3 and Cordoba during the second morning ( 8-12 hours) of September 21, 2011 (Sstudent Day “ and “Day of Spring”) .

Holographic p-wave Superconductor with Disorder Arean, Daniel; Pando Zayas, Leopoldo; Salazar, Ignacio; Scardicchio, Antonello We implement the effects of disorder on a holographic p-wave superconductor by introducing a random chemical potential which defines the local energy of the charge carriers. Since there are various possibilities for the orientation of the vector order parameter, we explore the behaviour of the condensate in the parallel and perpendicular directions to the introduced disorder. We clarify the nature of various branches representing competing solutions and construct the disordered phase diagram. We find that moderate disorder enhances superconductivity as determined by the value of the condensate. Though we mostly focus on uncorrelated noise, we also consider a disorder characterized by its spectral properties and study in detail its influence on the spectral properties of the condensate and charge density. We find fairly universal responses of the resulting power spectra characterized by linear functions of the disorder power spectrum.

P-selectin promotes neutrophil extracellular trap formation in mice Etulain, Julia; Martinod, Kimberly; Wong, Siu Ling; Cifuni, Stephen M.; Schattner, Mirta Ana; Wagner, Denisa D. Neutrophil extracellular traps(NETs)canbereleased in thevasculature. Inaddition totrapping microbes, they promote inflammatory and thrombotic diseases. Considering that P-selectin induces prothrombotic and proinflammatory signaling, we studied the role of this selectin in NETformation.NETformation(NETosis)wasinducedbythrombin-activated platelets rosetting with neutrophils and was inhibited by anti-P-selectin aptamer or anti-P-selectin glycoprotein ligand-1 (PSGL-1) inhibitory antibody but was not induced by platelets from P-selectin2/2 mice. Moreover, NETosis was also promoted by P-selectinimmunoglobulin fusion protein butnotby control immunoglobulin.We isolatedneutrophils frommice engineered tooverproduce soluble P-selectin (P-selectinDCT/DCT mice). Although the levels of circulating DNA and nucleosomes (indicative of spontaneous NETosis) were normal in these mice, basal neutrophil histone citrullination and presence of P-selectin on circulating neutrophils were elevated. NET formationafter stimulationwithplatelet activatingfactor, ionomycin,orphorbol 12-myristate 13-acetatewassignificantlyenhanced, indicating that the P-selectinDCT/DCT neutrophils were primed for NETosis. In summary, P-selectin, cellular or soluble, through binding to PSGL-1, promotes NETosis, suggesting that this pathway is a potential therapeutic target for NET-related diseases.

The Parkinson-associated human P5B-ATPase ATP13A2 protects against the iron-induced cytotoxicity Rinaldi, Debora Eugenia; Corradi, Gerardo Raul; Martinez Cuesta, Lucia; Adamo, Hugo Pedro; de Tezanos Pinto, Felicitas P-type ion pumps are membrane transporters that have been classified into five subfamilies termed P1-P5. The ion transported by the P5-ATPases is not known. Five genes named ATP13A1-ATP13A5 that belong to the P5-ATPase group are present in humans. Loss of function mutations in the ATP13A2 gene (PARK9, OMIM 610513) underlay a form of Parkinson?s disease (PD) known as Kufor Rakeb Syndrome (KRS), which belongs to the group of syndromes of neurodegeneration with brain iron accumulation (NBIA). Here we report that the cytotoxicity induced by iron exposure was two-fold reduced in CHO cells stably expressing the ATP13A2 recombinant protein (ATP13A2). Moreover, the iron content in ATP13A2 cells was lower than control cells stably expressing an inactive mutant of ATP13A2. ATP13A2 expression caused an enlargement of lysosomes and late endosomes. ATP13A2 cells exhibited a reduced iron-induced lysosome membrane permeabilization (LMP). These results suggest that ATP13A2 overexpression improves the lysosome membrane integrity and protects against the iron-induced cell damage.

Ecotoxicity studies of antifungal metabolites of Bacillus sp. IBA 33; Estudios de Ecotoxicidad de metabolítos antifúngicos de Bacillus sp. IBA 33 Gordillo, M. A.; Gómez, Rocio Liliana; Navarro, Antonio Roberto; Maldonado, Maria Cristina Abstract: The increments of plant diseases caused by theproliferation of fungicide-resistant pathogens intensified theresearch of new active metabolites against them. The study ofbiological methods as an alternative to chemical control has reachrelevance in recent years. It has been suggested that the use ofmetabolites from Bacillus, is an alternative or supplementarymethod to chemical plant protection, if they are not toxic for theconsumers and environmentally friendly. The toxicity of differentconcentrations of antifungal metabolites produced by Bacillus sp.IBA 33 was evaluated. Their ability to induce cytotoxic effects wasinvestigated by different tests as hemolysis, and Artemia salina andAllium cepa L immobilization. With 2.56 mg/ml of antifungalmetabolites hemolysis reached 24.07%, to 1.28 mg/ml was 14%.HC50 was 10.41 mg/ml. A. salina nauplii exposed to 3.2, 1.6 and 0.8mg/ml of antifungal metabolites showed 80, 20 and 10% of mortalityrespectively; LD50 was 2.24 mg/ml. In Allium cepa L test after 72 hof treatment, the roots lengths were 8.75, 10.35 and 23.75 mm with3.2, 1.6 and 0.8 mg/ml of antifungal metabolites respectively. TheEC50 was 0.078 mg/ml. After 144 h the EC50 was 4.11 mg/ml. Onlywith 3.2 mg/ml of metabolites, chromosomal aberrations, cytoplasmvacuolization and decentralization of nuclei were observed in thecells of Allium cepa L. No micronuclei were detected. Under theexperimental conditions, the antifungal metabolites concentrationsassayed are considered non toxic.; El incremento de enfermedades de plantas causado por la proliferación de patógenos resistentes a fungicidas intensificó la investigación de nuevos metabolitos activos contra ellos. El estudio de métodos biológicos como una alternativa al control químico ha alcanzado relevancia en años recientes. Se ha sugerido que el uso de metabolitos de Bacillus, es una alternativa o un método suplementario a la protección química de las plantas, siempre y cuando ellos no sean tóxicos para los consumidores y sean amigables para el medio ambiente. Se ha evaluado la toxicidad de diferentes concentraciones de metabolitos antifúngicos producidos por Bacillus sp. IBA33. Se investigó su capacidad para inducir efectos citotóxicos mediante diferentes tests como hemólisis e inmovilización de Artemia salina y Allium cepa L. Con 2.56 mg/ml de metabolitos antifúngicos la hemólisis alcanzó 24.07%, para 1.28 mg/ml fue 14%. La HC50 fue 10.41 mg/ml. Nauplios de Artemia salina expuestos a 3.2; 1.6 y 0.8 mg/ml de metabolitos antifúngicos mostraron 80; 20 y 10% de mortalidad respectivamente después de 24 h de tratamiento; la LD50 fue 2.24 mg/ml. En el test de Allium cepa L después de 72 h de tratamiento, la longitud de las raíces fueron 8.75; 10.35 y 23.75 mm con 3.2; 1.6 y 0.8 mg/ml de metabolitos antifúngicos respectivamente, con una EC50 de 0.078 mg/ml. Después de 144 h la EC50 fue 4.11 mg/ml. Solamente con 3.2 mg/ml de metabolitos fueron observadas aberraciones cromosómicas, vacualización y descentralización de los núcleos en las células de Allium cepa L. No se observaron micronúcleos. Bajo las condiciones experimentales, las concentraciones de metabolitos antifúngicos ensayadas son consideradas no tóxicas.

Escuchando música en el transporte público: sobre usos de la telefonía móvil por parte de jóvenes; Escutando música no transporte público: sobre usos da telefonia móvel por parte de jovens; Listening music on the public transport: about uses of movile phones by young people Murolo, Norberto Leonardo El objeto de estudio del presente trabajo se focaliza en los usos de la telefonía móvil como reproductor musical en el espacio público. Esta práctica es comúnmente estilizada por jóvenes de sectores populares, quienes escuchan cumbia o reggaeton con altavoces y sin auriculares. Esta apropiación tecnológica es generalmente combatida por sus pares, la cultura adulta, inclusive por los licenciatarios del transporte público de pasajeros que piden que no se haga. De ello que comience a haber leyes que prohíben usar reproductores musicales sin auriculares en el transporte público. En ese contexto, proponemos analizar el fenómeno desde una perspectiva cualitativa asentada en entrevistas con jóvenes y observaciones. De ellas se desprende que no se trata solamente de la molestia que causa el ruido sino que las críticas se desplazan al género musical que estos jóvenes escuchan y de allí a una fuerte presencia de discriminación de clase.; O presente trabalho tem como foco os usos da telefonia móvel como reprodutora musical em espaços públicos. Esta prática é comumente produzida por jovens de setores populares, que escutam cumbia ou reggaeton em volume alto e sem fones de ouvido. Esta apropriação tecnológica é geralmente combatida por seus pares, a cultura adulta, inclusive por profissionais e usuários do transporte público que pedem para que não se pratique. Desse modo, começam a haver leis que proíbem o uso de reprodutores musicais sem fones de ouvido no transporte público. Nesse contexto, propomos analisar o fenômeno a partir de uma perspectiva qualitativa, baseada em entrevistas com jovens e observações. Verifica-se que não se trata somente do incômodo que causa esse tipo de ruído, mas de críticas sobre o gênero musical que esses jovens escutam e, então, de uma forte presença de discriminação de classe.; The study object of this paper focuses on the use of mobile phones as a music player in public space. This practice is commonly observed in youth of popular sectors, who listen cumbia and reggaeton with speakers without headphones. This technological appropriation is generally opposed by their peers, adult culture, including by users of public transport of passengers who are not asked about being disturbed by the noise. There are laws prohibiting the use of music players without headphones in public transport. In this context, we propose to analyze the phenomenon from a qualitative perspective based on interviews with young and observations. Of these it appears that there is another issue beyond just the annoyance caused by noise: the criticism towards the music genre that these young people use to listen related with a strong presence of class discrimination.

Vida de los poetas argentinos, 1: El lugar del paraíso. Hugo Gola Monteleone, Jorge Jose Inspirado en la noción que Roland Barthes propone en Sollers écrivain (Paris, Seuil, 1979) “critique affectueuse”, que “incluye en la lectura de un texto el conocimiento que podamos tener de su autor”, propongo un ensayo de crítica afectiva, basado en el conocimiento personal y amistoso de diez poetas argentinos. La poesía no sólo como indicio de la vida sino también la vida como efecto textual –documento, memoria, cuerpo, espacio, hábito, oralidad, familiaridad–, a través de ensayos donde concurran la entrevista y la crítica, la semblanza y la crónica, la interpretación y el relato. Este texto es el primero de la serie, referido al poeta Hugo Gola, en las ciudades de México DF y de Santa Fe, entre 2010 y 2012.; Inspired by the notion proposed by Roland Barthes in Sollers écrivain (Paris, Seuil, 1979), “affectionate criticism,” a reading of texts which "must include any knowledge the critic may have of the writer as a person," I propose an essay in affectionate criticism based on my personal closeness and friendship with ten Argentinean poets. Not only will poetry be considered as an index of life, but life itself will be taken as a textual effect –as document, memory, body, space, custom, orality, familiarity–, in essays where interview and criticism, vignette and chronicle, interpretation and narrative are mixed together. This text is the first of a series, and it is dedicated to the analysis of poet Hugo Gola, in the cities of México, DF, and Santa Fe, in the years 2010-2012.

Vínculos familiares, auto-etnografía y construcción de conocimiento en un contexto de apropiación musical: de Dyango a la cumbia villera Silba, Malvina Leonor ¿Se puede construir conocimiento desde las experiencias sensibles? ¿En qué medida se vinculan las elecciones de nuestros objetos de estudio con nuestras propias trayectorias biográficas? ¿Hasta qué punto nuestros gustos musicales están moldeados por las músicas heredadas de nuestro entorno familiar inmediato? ¿De qué forma condicionan o habilitan nuestras indagaciones la cercanía con el objeto de estudio seleccionado? Tomando estos interrogantes como disparadores, lo que sigue constituye una breve reflexión en torno al trabajo de campo que realicé entre 2006 y 2009 para mi Tesis Doctoral (Silba 2011), puntualizando dos aspectos centrales: por un lado, los vínculos con los "nativos" con quienes compartí esta experiencia etnográfica; y por el otro, las relaciones intergeneracionales en la construcción de gustos musicales propios y heredados.

Estimating Intelligence in Spanish: Regression Equations with the Word Accentuation Test and Demographic Variables in Latin America Sierra Sanjurjo, Natalia; Montañes, Patricia; Sierra Matamoros, Fabio Alexander; Burin, Debora Ines Spanish is the fourth most spoken language in the world, and the majority of Spanish speakers have a Latin American origin. Reading aloud infrequently accentuated words has been established as a National Adult Reading Test-like method to assess premorbid intelligence in Spanish. However, several versions have been proposed and validated with small and selected samples, in particular geographical conditions, and they seldom derive a formula for IQ estimation with the Wechsler Adult Intelligence Scale (WAIS) Full-Scale IQ (FSIQ). The objective of this study was to develop equations to estimate WAIS-Third Edition (WAIS-III) FSIQ from the Word Accentuation Test-Revised (WAT-R), demographic variables, and their combination within diverse Latin American samples. Two hundred and forty participants from Argentina and Colombia, selected according to age and years of education strata, were assessed with the WAT-R, the WAIS-III, and a structured questionnaire about demographic and medical information. A combined approach including place of birth, years of education, and WAT-R provided the best equation, explaining 76% of IQ variance. These equations could be useful for estimating premorbid IQ in patients with Latin American Spanish as their birth language.

Diez años del “Plan Nacional de Seguridad Alimentaria” en Argentina: una aproximación desde el enfoque de derechos; Ten years of the "National Plan for Food Security" in Argentina. An approach from the rights perspective Carrasco, Maximiliano; Pautassi, Laura Cecilia El artículo analiza las principales características del Plan Nacional de Seguridad Alimentaria en Argentina desde el enfoque de derechos, en tanto metodología que establece las vinculaciones entre las obligaciones contenidas en los pactos y tratados internacionales de Derechos Humanos y su incorporación a las políticas públicas. En ese sentido, se intentará dar respuesta a una serie de interrogantes, como: ¿Se respeta el contenido mínimo del derecho que se pretende asegurar ? Se respeta el principio de igualdad/no discriminación. Y el de progresividad/no regresividad. Se garantiza una correcta rendición de cuentas del programa basada en una oportuna producción de información y en la posibilidad de acceso a esta por parte de la ciudadanía. Se han instrumentado mecanismos de reclamo o está garantizado el acceso a la justicia para los/as titulares de la política/programa. En base a evidencia empírica se abordan los cuestionamientos señalados y se formulan recomendaciones para delinear políticas sociales respetuosas de los principios de los Derechos Humanos.; The article analyzes the main features of the ´National Food Security Plan´ in Argentina from the ´human rights-based approach´, which is a methodology that establishes linkages between the obligations contained in international Human Rights treaties and its incorporation into public policies. In that sense, we will try to answer a series of questions, including: Is the minimum core of the Human Right to Food fully respected? Is the principle of equality/non-discrimination respected? And the progressive realisation and non-regression principle? Are transparency and accountability guaranteed? Is it possible for citizens to access to public information? Have grievance mechanisms been implemented? Is it the access to justice guaranteed for the holders of the policy / program? Based on empirical evidence, the aforementioned questions are addressed and recommendations are made to delineate social policies that fully respect human rights principles.