Control predictivo para seguimiento de sistemas no lineales. Aplicación a una planta piloto. Ferramosca, Antonio; Gruber, J. K.; Limon, D.; Camacho, E.F. Este artículo trata el problema del diseño de un controlador predictivo para seguimiento de referencias cambiantes, en el caso de sistemas no lineales. Los controladores predictivos proveen leyes de control adecuadas para regular sistemas lineales o no lineales a un punto de equilibrio dado garantizando la satisfacción de restricciones y la estabilidad asintótica. Pero si este punto
de equilibrio cambia, el controlador podría perder la estabilidad o incluso la factibilidad y por lo tanto sería incapaz de seguir la referencia deseada. En (Ferramosca et al., 2009a) se ha propuesto un controlador predictivo para seguimiento de referencias capaz de garantizar factibilidad y convergencia al punto de equilibrio a pesar de los cambios que este pueda sufrir. En este artículo, este controlador se utiliza para controlar en tiempo real una planta piloto de procesos. Los resultados obtenidos demuestran que el controlador predictivo para seguimiento es capaz de controlar plantas con dinámicas no lineales y restricciones. El experimento demuestra cómo el controlador garantiza estabilidad, factibilidad y convergencia también en caso de referencias no alcanzables.; This paper deals with the tracking problem for constrained nonlinear systems using a model predictive control (MPC) law. MPC provides a control law suitable for regulating constrained linear and nonlinear systems to a given target steady state. However, when the target operating point changes, the feasibility of the controller may be lost and the controller fails to track the reference. Recently, a novel MPC for tracking constrained nonlinear systems has been presented (Ferramosca et al., 2009a). This is capable to steer the system to any reference, even in the case of changing references. In this paper, this controller is used for the real-time control of a chemical pilot plant. The obtained experimental results demonstrate that the MPC for tracking is suitable for the control of plants with nonlinear dynamics since it ensures stability and offset-free convergence in case of large changes in the reference even using short prediction horizons. Besides, in case of unreachable set points, the controller steers the system to the closest reachable equilibrium point.

Nutritional and phytochemical study of Ilex paraguariensis fruits Cogoi, Laura Carolina; Giacomino, M. Silvia; Pellegrino, Nestor; Anesini, Claudia Alejandra; Filip, Rosana Yerba mate is defined as the product constituted by the dried, slightly roasted, and milled leaves of Ilex paraguariensis. However, the fruits of this species are often found in the commercial product. Nowadays the fruits are considered a byproduct. The objective of this work was to obtain the preliminary data of minerals, lipids, methylxanthines and polyphenols in the ripe fruits of I. paraguariensis. The results showed a considerable amount of total dietary fiber ( g/100 g) and nutritionally valuable minerals: potassium ( mg/100 g), iron ( mg/100 g), magnesium ( mg/100 g), calcium ( mg/100 g), copper ( mg/100 g), zinc ( mg/100 g), and sodium ( mg/100 g). The lipid content was 4.5 g/100 g. Oleic acid was the predominant unsaturated fatty acid ( g/100 g). Linoleic acid ( g/100 g) was also present. Methylxanthines were quantified: caffeine () and theobromine () g/100 g. The total polyphenol content was  g/100 g. The results obtained in this work suggest the potential value of the fruits of I. paraguariensis for the development of novel products in the food and pharmaceutical industries. This paper aims to contribute to the scientific knowledge of a natural by-product from industry regarding the need of foods and medicines for the new millennium.

Association of monthly frequencies of diverse diseases in the calls to the public emergency service of the city of Buenos Aires during 1999–2004 with meteorological variables and seasons Alexander, Pedro Manfredo This work aims to study associations between monthly averages of meteorological variables and monthly frequencies of diverse diseases in the calls to the public ambulance emergency service of the city of Buenos Aires during the years 1999–2004. Throughout this time period no changes were made in the classification codes of the illnesses. Heart disease, arrhythmia, heart failure, cardiopulmonary arrest, angina pectoris, psychiatric diseases, stroke, transient ischemic attack, syncope and the total number of calls were analyzed against 11 weather variables and the four seasons. All illnesses exhibited some seasonal behavior, except cardiorespiratory arrest and angina pectoris. The largest frequencies of illnesses that exhibited some association with the meteorological variables used to occur in winter, except the psychiatric cases. Heart failure, stroke, psychiatric diseases and the total number of calls showed significant correlations with the 11 meteorological variables considered, and the largest indices (absolute values above 0.6) were found for the former two pathologies. On the other side, cardiorespiratory arrest and angina pectoris revealed no significant correlations and nearly null indices. Variables associated with temperature were the meteorological proxies with the largest correlations against diseases. Pressure and humidity mostly exhibited positive correlations, which is the opposite of variables related to temperature. Contrary to all other diseases, psychiatric pathologies showed a clear predominance of positive correlations. Finally, the association degree of the medical dataset with recurrent patterns was further evaluated through Fourier analysis, to assess the presence of statistically significant behavior. In the Northern Hemisphere high morbidity and mortality rates in December are usually assigned to diverse factors in relation to the holidays, but such an effect is not observed in the present analysis. There seems to be no clearly preferred meteorological proxy among the different types of temperatures used. It is shown that the amount of occurrences depends mainly on season rather on its strength quantified by temperature.

Adlayers of Alkanedithiols on Au(111): effect of disulfide reducing agent Cometto, Fernando Pablo; Ruano Sandoval, Gustavo Daniel; Ascolani, Hugo del Lujan; Zampieri, Guillermo Enrique High-resolution photoemission spectroscopy is used to characterize adlayers of ethane-, hexane-, and nonanedithiol molecules grown on Au(111) surfaces by the immersion method. The effect of using a reducing agent during and after the immersion to inhibit or eliminate S–S bonds is investigated. Our results demonstrate that immersion 24 h in millimolar dithiol ethanolic solutions gives rise to the formation of multilayers; this effect is more pronounced in the case of ethanedithiol, the shortest molecule. A post-treatment with a disulfide reducing agent is effective to produce monolayers of standing-up molecules; this effect is again more pronounced in the case of ethanedithiol. Finally, the immersion 24 h in a solution containing dithiol and the reducing agent gives an unexpected result: most molecules remain adsorbed in the lying-down configuration; in this case, the almost complete suppression of the standing-up phase occurs equally with the three types of molecules, which suggests that the formation of S–S bonds must be important for the lifting of the molecules.

Memoria, proliferación y fama en la Historia verdadera de la conquista de la Nueva España Añon, Valeria La memoria como tema y como tópico ha sido una de las principales preocupaciones de la crítica en relación con las crónicas de la conquista de México (y las crónicas de Indias en general). Su mención incluye la tensión entre experiencia y saber letrado, el estatuto del testigo de vista en el relato de la historia, la disputa en torno del discurso historiográfico y la autoridad enunciativa. En este marco, la Historia verdadera de Bernal Díaz del Castillo se ha constituido en un texto privilegiado en el que leer las inflexiones de la memoria, en particular debido a la insistencia de un narrador que se define a sí mismo como un gran memorioso. En este trabajo me propongo dar cuenta de las inflexiones discursivas de la memoria, indagar en qué consiste –textual y retóricamente– esta apelación a la memoria, cómo se articula con el olvido, cuál es el rol de la alegoría y la apelación a la Fama en los capítulos liminares, y cuáles son los usos de la memoria que hacen a la peculiar melodía y sabor de la Historia verdadera.; In literary and critical colonial studies, memory as an issue and as a topic has been, at least from the last three decades, one of the fundamental ways of going through the corpus of chronicles of the Conquest of México. Talking about memory implies a reflection on experience, literacy, testimony and eyewitnesses, and the polemics between historical discourses and direct experience. In this context, one of the outstanding texts has been the Historia verdadera de la conquista de la Nueva España, written by Bernal Díaz del Castillo, who defines himself as a soldier with a huge memory and as a truthful narrator. In this article, we aim to analyze this reflection on memory and forgetfulness, and on memory as a form of discursive organization, as well as to define its role in the several polemics in which Bernal Díaz has been part of as an encomendero and as a former soldier.; A memória tem sido uma das principais preocupações da crítica em relação às crônicas da conquista do México (e as crônicas das Índias, em geral). Seu campo de estudo inclui a tensão entre a experiência e o saber letrado, a autoridade da testemunha ocular, a disputa sobre o discurso historiográfico e a autoridade enunciativa. Neste contexto, a Verdadeira História de Bernal Díaz del Castillo tornou-se texto central na leitura das inflexões da memória, principalmente devido à insistência de um narrador que descreve-se como um grande memorialista. Neste artigo pretendo explicar as inflexões da memória, analisar como este apelo a memoria é feito do ponto de vista retórico, qual é o papel do esquecimento, qual é o papel da alegoria da Fama, e como os usos da memória fornecem essa melodia e sabor peculiar à história de Bernal Díaz del Castillo.

Biopolítica y ambiente en cuestión: lugares de la basura Grinberg, Silvia Mariela; Dafunchio, Sofia; Mantiñán, Luciano Martín Actualmente, adquirió especial centralidad la basura y su valor. En este trabajo, enmarcado en estudios de gubernamentalidad y de Biopolítica en el siglo XXI, describimos los vínculos y relaciones que los habitantes de un barrio (“villa miseria”) establecen cotidianamente con la basura. El trabajo de investigación, base de este artículo, se desarrolla desde 2008 en un barrio de la región metropolitana de la ciudad de Buenos Aires que creció al calor de los procesos de metropolización selectiva y degradación ambiental que caracteriza a la pobreza urbana desde fines del siglo XX. La basura atraviesa hoy la cuestión urbana y la sociedad de consumo, constante productora de cosas desechables. Mediante un trabajo de campo etnográfico, estudiamos las dinámicas que adquiere la basura en la vida del barrio y los modos en que se hace presente en la cotidianidad de las escuelas; específicamente, cómo es pensada y vivida atendiendo a la tensión entre desecho y valor que contiene la basura. Es un área que ha crecido históricamente ligada con el cartoneo y con la recolección de basura en el relleno sanitario de la ciudad. Abordamos los conflictos y contradicciones que genera vivir entre la basura, fuente de vida y de contaminación.; At present, garbage and its value became especially central issues. In this paper, framed in studies of governmentality and biopolitics in the XXI century, we describe the links and relationships that residents of a neighborhood, (“slum”), establish daily with trash. The research, on which this article is based, is developed since 2008 in a district of the metropolitan area of Buenos Aires who grew up as part of selective metropolization processes and environmental degradation that characterizes urban poverty since the late twentieth century. Trash crosses, in the present, urban issues, and, the consumer society, permanent producer of disposable things. Through ieldwork, developed from an ethnographic approach, we focus on the dynamics that takes away the life of the neighborhood and the ways in which it is present in the daily life of schools. Speciically, is looked into and thought lived addressing the tension between value and waste containing garbage. This is an area of the city of Buenos Aires that has grown historically linked with cardboard men, rag-picker, and garbage collection in the city landill. Here, we address the conlicts and contradictions generated of living among garbage, that is both life resource and contamination.

Mercado de viviendas en Rosario: caracterización y dinámica entre 1920 y 1948 Cutruneo, Jimena Paula Partiendo de las condiciones existentes propias del proceso de metropolización iniciado en Argentina hacia 1880, en este artículo se analizan los rasgos generales del mercado inmobiliario de la ciudad de Rosario entre los años 1920 y 1948. Poniendo especial atención en el mercado de viviendas, se presenta la relación con variables de la economía nacional y local. En este sentido, se exponen -entre otras cuestiones- la situación de los transportes públicos, las infraestructuras y los movimientos comerciales producidos en las distintas zonas de la planta urbana para estos años. A la vez que se establecen algunas aproximaciones respecto de la relación entre los vaivenes del mercado inmobiliario de viviendas y ciertas políticas que desde distintos niveles gubernamentales (sea nacional o municipal) condicionaron esta actividad.; Based on existing conditions within the process of metropolization began in Argentina in 1880, this artile discusses the general traits of the housing market in the city of Rosario between 1920 and 1948. Paying special attention to the housing market, presents the variables related to national and local ecoomy. In this sense, they are exposed, among other issues, the situation of public transport, infrastructure and trade flows produced in different parts of the urban for these years. While some approaches are established regarding the relationship between the fuctuations in the housing market and certain housing policies from different level of government (whether national or municipal) conditioned activity.

Barroco y vitalismo en la construcción de un espacio imaginario: la vida breve (1950) de Juan Carlos Onetti Linares, Maximiliano Las múltiples, intensas, conmovedoras vidas breves narradas por Juan Carlos Onetti parecieran, a veces, carecer de énfasis, transcurrir apagadas casi sin acaecer. Es el momento en que el incipit se enfrenta con la clausura para fundirse y, acaso, autorrectificarse: "Puedo alejarme tranquilo; cruzo la plazoleta y usted camina a mi lado, alcanzamos la esquina y remontamos la desierta calle arbolada, sin huir de nadie, sin buscar ningún encuentro, arrastrando un poco los pies, más por felicidad que por cansancio" (párrafo final de LVB, 294- 295, destacado nuestro). Sin embargo y por eso mismo, como lo demuestra esta novela capital en la narrativa hispanoamericana del siglo XX, el espesor de sus temas, la novedad de los recursos técnicos incorporados en su redacción y la demoledora belleza conque resultó plasmada configuran una escritura gozosamente ineludible. Este cierre remite al principio, resemantiza el "mundo loco" de la Queca porque ahora ya no es un hablar sobre el carnaval sino que ahora se está, concretamente, en el carnaval, un tempo que Onetti lleva a la ficción para que ésta se introduzca en lo real: los personajes han elegido un disfraz (Calderón planteaba con el "Gran Teatro del Mundo" que cada uno cumple el rol que Dios distribuyó entre los hombres: uno es rey, el otro es mendigo, el otro panadero, el de más allá un joyero, y el que está al lado un sirviente y lo importante no es salirse del rol sino cumplirlo lo mejor posible) y con él escapan, disparan, se fugan, se evaden, se liberan de la realidad y por eso entran en otra realidad. Los límites entre realidad y realidad son a veces lábiles pero siempre hay una frontera que es necesario cruzar. El barroco y el vitalismo como componentes esenciales de los devenires textuales en onetti.

Oscillations and translation of a free cylinder in a viscous confined flow D'angelo, María Verónica; Hulin, Jean-Pierre; Auradou, Harold An oscillatory instability has been observed experimentally on an horizontal cylinder free to move and rotate between two parallel vertical walls of distance H. The vertical motion of the cylinder, its rotation about its axis, and its transverse motion across the gap have been investigated as a function of its diameter D, its density ρs, of the mean vertical velocity U of the fluid, and of its viscosity ν. The relevant Reynolds number Re is shown to be based on the cell aperture H and on the relative velocity Vr between the fluid and the cylinder. For a blockage ratio D/H above 0.5 and Re above 20, oscillations of the rolling angle of the cylinder about its axis and of its transverse coordinate in the gap were observed together with periodic variations of the vertical velocity. For a given fluid-cylinder pair, the relative velocity Vr as well as the frequency f and the amplitude of the transverse velocity for these oscillations are nearly independent of the flow velocity U. For given cylinder density and fluid characteristics, f is also nearly independent of the ratio D/H in the range investigated. The oscillations could be observed down to values of Re as low as 30: this is lower than usual values for vortex shedding in confined geometries, which suggests that one might deal with a different instability mechanism.

PPARγ ligand treatment inhibits cardiac inflammatory mediators induced by infection with different lethality strains of Trypanosoma cruzi Penas, Federico Nicolás; Mirkin, Gerardo A.; Hovsepian, Eugenia; Cevey, Ágata Carolina; Caccuri, Roberto Luis; Sales, Maria Elena; Goren, Nora Beatriz Trypanosoma cruzi (T. cruzi), the etiological agent of Chagas' disease, causes cardiac alterations in the host. Although the main clinical manifestations arise during the chronic stage, the mechanisms leading to heart damage develop early during infection. In fact, an intense inflammatory response is observed from acute stage of infection. Recently, peroxisome proliferator-activated receptors (PPARs) have attracted research interest due to their participation in the modulation of inflammation. In this work we addressed the role of 15-Deoxy-∆12,14 ProstaglandinJ2 (15dPGJ2), a PPARγ natural ligand in the regulation of inflammatory mediators, in acute and chronic experimental mouse models of Chagas' disease with the RA and K98 T. cruzi strains, respectively. This work demonstrates that 15dPGJ2 treatment inhibits the expression and activity of inducible nitric oxide synthase (NOS2) as well as TNF-α and IL-6 mRNA levels. Also, expression and activity of metalloproteinases 2 (MMP-2) and 9 (MMP9) were inhibited by 15dPGJ2. Moreover GW9662, a specific PPARγ antagonist, revealed the participation of other signaling pathways since, in GW9662 presence, 15dPJG2 had a partial effect on the inhibition of inflammatory parameters in the acute model of infection. Accordingly, NF-κB activation was demonstrated, assessing p65 nuclear translocation in the hearts of infected mice with both T. cruzi strains. Such effect was inhibited after 15dPGJ2 treatment. Our findings support the concept that in vivo PPARγ and NF-κB pathways are implicated in the inhibitory effects of 15dPGJ2 on inflammatory mediators at different times depending on whether the infection is caused by the lethal or non-lethal T. cruzi strain.

The opening of the Magellan Strait and its geodynamic implications Ghiglione, Matias; Navarrete Rodríguez, Ángela Teresa; Gonzalez Guillot, Mauricio Alberto; Bujalesky, Gustavo Gabriel The existence of a Neogene-Quaternary rift system responsible for the opening of the eastern Magellan strait has been one of the more peculiar tectonic features of the southernmost Andes since its discovery more than a decade ago. However, until now there has been no explanation pinpointing the specific tectonic factors that led to the development of the rift. This work focuses on the interaction between the fault systems and the tectonic regimes that have affected Tierra del Fuego north of the South America–Scotia left lateral strike-slip plate boundary. Due to a good match between a Jurassic extensional fault array orientation and the principal stress directions related to the strike-slip plate boundary, we conclude that Jurassic transfer faults reactivated extensionally generating the Magellan rift system. This process was enhanced by northward continental drift, and has implications for the geodynamic behind the separation of South America from Antarctica.

Anxiogenic-like effects of Uncaria tomentosa (Willd) DC aqueous extract in an elevated plus-maze test in mice: a preliminary study Bigliani, María Celeste; Rosso, María Celeste; Zunino, María Paula; Baiardi, Gustavo Carlos; Ponce, Andrés Alberto The purpose of this study was to examine the effect of orally administered Uncaria tomentosa aqueous extracts (UTE) (Willd. ex Roem. & Schult.) DC. (Rubiaceae) during 7, 15, 30 and 90 days of treatment on the expression of anxiety, as expressed in the elevated plus maze test in male Albino Swiss mice. UTE revealed an anxiogenic effect in relation to the control group at 15 and 30 days, but it was reversed after 90 days of administration, without affecting the locomotor activity or any deleterious effects on the overall performance of the animal, either for its ambulation, or clinical status, and body weight and organ weight/body weight from liver, lung and kidney were unaffected. These biphasic effects are usually indicative of heterogeneity in sites of action due to the presence of many alkaloids (speciophylline, uncarine F and uncarine E) and flavanols (catechin and epigallocatechin) identified and isolated from UTE.

Analysis of the pX region of bovine leukemia virus in different clinical stages of Enzootic Bovine Leukemia in Argentine Holstein cattle Panei, Carlos Javier; Serena, Maria Soledad; Metz, German Ernesto; Bravi, Maria Emilia; Gonzalez, Ester Teresa; Echeverria, Maria Gabriela Bovine leukemia virus (BLV) infection in cattle causes Enzootic Bovine Leukemia (EBL). About 30% of infected cattle develop persistent lymphocytosis (PL), a 0.1–5% develops tumors, and a 70% remains asymptomatic in an aleukemic stage (AL). Regulatory genes of BLV (Tax, Rex, R3 and G4) are located in a region known as pXBLV. The variability of those genes had been postulated with the progression of the disease. The aim ofthis work was to compare the wild-type proviral pXBLV region at different stages of BLV natural infected cattle from Argentine Holstein. Pairs of primers were designed to amplify the proviral pX region of 12 cattle by PCR, and products were then sequenced, aligned and compared both with each other and with the reference sequence. Results show a divergence percentage from 0 to 6.1 for the Tax gene, from 0 to 9.4% for the Rex gene, from 0 to 12.1% for the R3 gene and finally from 0 to 6.5% for the G4 gene. Results obtained with hierarchical clustering showed two clusters well differentiated, where the members of each cluster are cattle that had tumor, PL and AL, not allowing differentiate those two cluster by clinical stage.

Effect of organic calcium salts–inulin systems on hydration and thermal properties of wheat flour Salinas, Maria Victoria; Puppo, Maria Cecilia The aim of this work was to study the effect of calcium acid salts–inulin systems on hydration and thermal properties of wheat flour dough. Wheat flour was enriched with calcium lactate (CaLa2) or calcium citrate (Ca3Ci2) (1080–2520 ppm Ca) and inulin (In) (1%–13%, w/w flour basis). Water absorption (Wabs), moisture content (Mcont), water activity (aw) and relaxation time (λ) of dough were analyzed. Pasting properties during heating–cooling process were studied: peak viscosity (PV), breakdown (BD), final viscosity (FV) and setback 1(SB1) were determined. Temperatures (TpI, TpII) and enthalpy (ΔHgel) of gelatinization of dough were analyzed by DSC. Samples with Ca and In presented lower Wabs than control sample with an In2 dependence, with slight difference between both surface responses. More time for dough development (td) was necessary with Ca3Ci2 than with CaLa2, being td independent of calcium content at In level (≥6.5%). Dough with Ca3Ci2 was more stable with less degree of softening than CaLa2-dough, due to the protein stabilizing effect of citrate ion (Hofmeister series) with a maximum at 6.5% In. Mcont and λ decreased with the increase of In, independently of calcium. Hydration properties directly influenced pasting parameters. The increase in In content decreased viscosity (PV, FV) without affecting BD. SB1 behavior suggests the formation of pastes with low and high stability with CaLa2 and Ca3Ci2, respectively. Gelatinization degree decreased (40%) and retarded (ΔT=10 °C) at high levels of both ingredients. CaLa2 had more influence in hydration and thermal properties of wheat flour–inulin blends, enhancing a high degree of inhibition of gelatinization and leading to pastes with low viscosity after cooling. This behavior was influenced by the presence of inulin.

Evolución de la Trypanosomosis bovina por Trypanosoma vivax en Formosa (Argentina). Años 2007 - 2012 y su potencial dispersión en el país.; Evolution of bovine Trypanosomosis by Trypanosoma vivax in Formosa (Argentina). Years 2007-2012 and its potential spread in the country Monzon, Carlos Manuel; Mancebo, Orlando Antonio; Giménez, Juana Noemí; Russo, Ana Maria En base al diagnóstico parasitológico para para tripanosomas de bovinos, se describe la evolución de la onda epizoótica del T. vivax iniciada en Argentina hacia finales del año 2006. Analiza la frecuencia de animales infectados en los diferentes meses del año, a demás de las diferentes características clínicas y epidemiológicas de esta nueva enfermedad en el ganado de Argentina. En base al historial epidemiológico de esta tripanosomosis en países de la región se alerta sobre la propagación de la enfermedad a las principales regiones ganaderas de la Mesopotamia y de la Pampa Húmeda Argentina.; This paper based on parasitological diagnosis made in cattle for tripanosomes, describes the evolution of the T. vivax epizootic wave started in Argentina at the end of 2006 year. Analyzes the frequency of infected animals in different months of the years, in addition to the clinical and epidemiological characteristics of this new disease in cattle in Argentina. Based on the epidemiological history of this tripanosomosis in neighbors countries it warns about the spread of the disease to the most important domestic livestock of Argentina, especially in the Mesopotamia and the Pampa Humeda regions.

Diamond-Based Thin Film Bulk Acoustic Wave Resonator for Biomedical Applications Zalazar, Martin; Guarnieri, Fabio Ariel Nowadays it is in constant growing the development of thin film bulk acoustic resonators. If the piezoelectric material is going to be implanted in the human body, an important requirement is the biocompatibility of the implant. In this regard, Aluminum Nitride (AlN) has emerged as an attractive alternative for use in biomedical MicroElectroMechanical Systems. Ultrananocrystalline Diamond (UNCD) is a promising material to be used in biomedical applications, due to its extraordinary mulifunctionality; it is exceptional for implantable medical devices requiring stringent biological performance. Since both UNCD and AlN films can be processed via photolithography processes used in microfabrication, the integration of UNCD and AlN films provides the bases for developing a new generation of biocompatible Bio-MEMS/NEMS. Research and development was conducted to produce implantable MEMS devices: Pt/piezoelectric AlN/Pt layer heterostructure was grown and patterned on the UNCD membrane with a Ti adhesion layer. By applying voltages between the top and bottom Pt electrodes layers the piezoelectric AlN layer is energized. The feasibility of the fabrication of biocompatible AlN/diamond-based FBAR structure has been demonstrated.

Representación de los extensionistas rurales argentinos sobre los pequeños productores; Representação dos extensionistas rurais argentinos sobre os pequenos agricultores; Argentine rural extensionists' representation of small farmers Landini, Fernando Pablo Actualmente asistimos a un resurgimiento de la extensión rural en América Latina. Procurando contribuir a la comprensión de los fundamentos psicosociales de las prácticas extensión, se estudió la representación social que los extensionistas tienen de los pequeños productores a partir de una encuesta realizada a técnicos que trabajan en distintas instituciones publicas argentinas (n=219). Las preguntas abiertas fueron categorizadas siguiendo los principios de la Teoría Fundamentada. Luego, los resultados de esta etapa fueron cuantificados, asociados con diferentes variables sociodemográficas y utilizados para la construcción de clusters. Existen cuatro grandes áreas de la representación que se relacionan de manera compleja con distintos modelos de extensión rural. La primera área describe a los productores como aprovechados o dejados de lado por actores más poderosos, la segunda como portadores de escasos recursos para salir adelante, la tercera con características internas negativas y la cuarta como poseedores de capacidades y recursos.; Assistimos atualmente a um ressurgimento da extensão rural na América Latina. Buscando contribuir á compreensão dos fundamentos psicossociais das práticas de extensão, estudou-se a representação social que os extensionistas rurais têm dos pequenos produtores através duma enquete feita a técnicos que trabalham em diferentes instituições públicas da Argentina (n = 219). As perguntas abertas foram categorizadas de acordo com os princípios da Grounded Theory. Depois, os resultados obtidos nesta etapa foram quantificados, relacionados com diferentes variaveis sociodemográficas e utilizados para a construção de aglomerados (clusters). Há quatro áreas principais de representação as quais estão relacionados de forma complexa com diferentes modelos de extensão rural. A primeira área descreve a os produtores como explorados ou deixado de lado por actores sociais mais poderosos, a segunda como tendo recursos limitados para progredir na vida, a terceira como pessoas que têm características internas negativas, e quarto como tendo capacidades e recursos persoais.; Nowadays, rural extension is resurging in Latin America. Aiming at contributing to understand the psychosocial foundations of rural extension practices, the rural extensionists' social representation of small farmers was studied. In this vein, 219 extensionists working in different Argentine public institutions were surveyed. The open questions were analyzed following Grounded Theory. Then, the results of this phase were quantified and related to different socio-demographic variables. Also, a cluster analysis was conducted. Four areas of the representation highlight. One describes small farmers as set aside and taken advantaged of by more powerful social actors; the second as not having resources to 'get ahead'; the third as possessing negative internal characteristics and the last one as owners of useful capacities and resources.

Represión y constitución de subjetividades marginales: una mirada sobre el cuerpo y la movilidad en ciudad de Villa María, Argentina; Repression and formation of marginal subjectivities: a look at the body and mobility on Villa María city, Argentina Aimar, Lucas Alberto; Peano, Alejandra del Valle El presente trabajo presenta algunas reflexiones (desde una perspectiva sociológica centrada en el cuerpo y las emociones) sobre la vivencialidad corporal y emocional de jóvenes de sectores populares afectados por diversas formas de represión policial y segregación urbana en la ciudad de Villa María (provincia de Córdoba, Argentina). En una primera parte se describen las principales características de la temática vinculada al binomio seguridad/inseguridad en nuestro país al hacer especial foco en la provincia de Córdoba y la ciudad de Villa María. Posteriormente, se resumen las nociones de cuerpo piel, cuerpo movimiento y cuerpo imagen, a fin de explicar su productividad para comprender (a través de la lectura de datos recogidos en entrevistas con jóvenes de sectores populares víctimas de represión policial) las marcas corporales que se vinculan con la posibilidad de circular en ciertos espacios, las estructuras sociales y las políticas públicas de seguridad/represión. Los datos son presentados en un recorte que permite entender el modo en que determinadas formas de represión y políticas judiciales/policiales afectan las biografías de los jóvenes y su relación con los entornos (cada vez más hostiles) en los que se desenvuelven. Finalmente, se sostiene que las políticas de seguridad intensifican la desconfianza sobre el otro de clase, especialmente el joven-varón y pobre, alrededor de una configuración corporal donde la construcción de una imagen para el otro; la estigmatización y la sensibilidad represiva; y las imposibilidades de movimiento se arraigan en condiciones estructurales encarnadas y prácticas de represión que para los jóvenes son cotidianas.; This paper aims to present some thoughts (from a sociological perspective centered on the body and emotions) of the experiencing of the body and emotions of young popular sectors affected by forms of police repression and urban segregation in the Villa Maria city (province Córdoba, Argentina). The first part describes the main features of the security/insecurity issue in our country, with particular focus on the Cordoba province and the Villa Maria city. Subsequently we summarize notions of «body-skin», «body-image» and «body-movement», explaining their productivity to understand (through the reading of data collected in interviews with grassroots young victims of police repression) the body marks that are linked with the possibility of circulating in certain spaces, social structures and state politics of security/repression. The data are presented in a cut that allows us to understand how certain forms of political repression and judicial practices affect the biographies of young people and their relationship with (increasingly hostile) environments in which they live. Finally, it is argued that security policies intensify the distrust on the «Other of class» (especially the young- male-poor) in connection with one process where the construction of an image to another; stigma and repressive sensitivity, and the impossibilities of movement; are rooted in structural conditions and repressive practices that the young-male-poor live every day.

Trabajo, desarrollo y clasificación de residuos: transformaciones en el último medio siglo Dimarco, Sabina Alejandra Durante las últimas décadas en casi toda América Latina ha surgido un nuevo actor social: las organizaciones de clasifi cadores urbanos de residuos. El presente artículo analiza ese fenómeno reciente tomándolo como un hecho social que condensa dos profundas transformaciones estructurales que han signado al continente latinoamericano a lo largo del último medio siglo: por un lado, las acontecidas en el mundo del trabajo y que refi eren tanto a los cambios del mercado de trabajo como a aquellos ocurridos en la forma en que se piensa lo que es el trabajo “digno” y, por el otro, en la forma en que se piensa la cuestión del desarrollo en estos países a partir del surgimiento de la cuestión ambiental y las teorías del desarrollo sustentable.

Distintas miradas sobre el plan de inclusión previsional. Un análisis de caso Bravo Almonacid, Florencia El plan de inclusión previsional es una política implementada en el año 2005 de corte universal, destinada a las personas adultas mayores del país. Este trabajo tiene como objetivo analizar dicha política de seguridad social, mostrando diversas miradas sobre el Plan de Inclusión Previsional utilizando técnicas cuali y cuantitativas de recolección de información, como encuestas socio demográficas, entrevistas a ejecutores locales del programa, referentes barriales y destinatarios. A partir de este trabajo se buscará aportar a la discusión sobre las políticas públicas dirigidas hacia las personas mayores en la Argentina a partir del estudio del este programa y sus implicancias en las condiciones de vida de personas mayores en situación de pobreza de nuestro país.; The provisional inclusion plan is a universal policy implemented in 2005, aimed at older adults of the country. This paper aims to analyze that policy of social security, showing different views on it, using qualitative and quantitative data collection techniques, such as socio-demographic surveys, interviews with local program implementers, neighborhood managers and social-policy target. The achieve of this paper is to contribute for the discussion of public policies towards older adults in Argentina from the study of provisional inclusion plan and its implications on living conditions of poor older people in our country.