Adolescentes y redes sociales online: el photo sharing como motor de la sociabilidad

Los adolescentes han ampliado las prácticas de la cultura fotográfica: lo que era una práctica solemne para fijar en la memoria familiar una serie de ritos de pasaje en las trayectorias vitales, se ha transformado en una práctica lúdica y cotidiana para compartir con el grupo de pares. Esta práctica, que se basa en la producción y publicación de imá- genes para estimular la sociabilidad en redes sociales online, ha sido motorizada por una serie de cambios tecnológicos y socio-culturales que se han dado en paralelo al desarrollo de la Internet 2.0: 1) los adolescentes que tienen acceso a una computadora con Internet y a una cámara de fotos digital, pueden utilizar un repertorio de herramientas de creación y manipulación de imágenes de bajo nivel de dificultad que hasta hace pocos años era inexistente; 2) las redes sociales online le otorgan a la circulación de imágenes un lugar preponderante; 3) la sociabilidad a partir del photo sharing se ha vuelto la principal actividad online de la mayoría de los adolescentes. Considerando dichas transformaciones, este trabajo explora a partir de observaciones y entrevistas en profundidad, las diversas formas en que los adolescentes utilizan la fotografía digital como componente central de su sociabilidad cotidiana.Teenagers have expanded the practices of the photographic culture: what used to be a solemn practice to fix in the family memory some series of lifetime rites, has been transformed into a recreational and daily practice to share with peers. This practice, which is based on the production and publication of images to stimulate sociability in online social networks has been powered by a series of technological and socio- cultural changes that have occurred in parallel to the development of the Internet 2.0 : 1 ) adolescents who have access to a computer with Internet and a digital camera can use a repertoire of tools for creating and manipulating images with low difficulty level that a few years ago was non-existent ; 2) online social networks give the circulation of images a prominent place ; 3) sociability from photo sharing has become the leading online activity of most teenagers. Considering these changes, this article explores from observations and interviews, the various ways in which teenagers use digital photography as a central component of their everyday sociability.Os adolescentes ampliaram as práticas da cultura fotográfica: o que era uma prática solene para fixar na memória familiar uma série de rituais de passagem nas trajetórias vitais, se transformou numa prática lúdica e cotidiana para compartilhar com o grupo de pares. Esta prática, baseada na produção e publicação de imagens para estimular a sociabilidade em redes sociais on-line, foi motorizada por uma série de câmbios tecnológicos e sócio culturais que foram paralelos ao desenvolvimento de Internet 2.0. 1) Os adolescentes que têm acesso a um computador com Internet e a uma câmera digital, podem usar um repertório de ferramentas de criação e manipulação de imagens de baixo nível de dificuldade que até pouco era inexistente; 2) as redes sociais on-line lhe outorgam à circulação de imagens um lugar preponderante; 3) a sociabilidade a partir do photo sharing é hoje a principal atividade on-line dos adolescentes. Considerando essas transformações, este trabalho explora a partir de observações e entrevistas em profundidade as diversas formas em que os adolescentes usam a fotografia digital como componente central da sua sociabilidade cotidiana.Fil: Basile, Diego Alejandro. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Instituto de Investigaciones ; ArgentinaFil: Linne, Joaquín Walter. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Instituto de Investigaciones ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

The virtual nightclub: dating in adolescents popular sectors through facebook

El objetivo de nuestro artículo de investigación es explorar y describir los modos en que los adolescentes de sectores populares de la Ciudad de Buenos Aires buscan pareja a través de la red social Facebook. Para esto indagamos en la información que proveen en sus perfiles, en las estrategias que despliegan para seducir y lograr visibilidad en los muros de su comunidad de pares, en las ventajas y desventajas que ellos señalan en torno a buscar pareja a través de la red social y en las diferencias según género. A nivel metodológico, en esta investigación de tipo mixta, realizamos a nivel cuantitativo una encuesta a adolescentes de sectores populares de la Ciudad de Buenos Aires (n: 150); a nivel cualitativo, hemos hecho observaciones y veintincinco entrevistas en profundidad a adolescentes de sectores populares en colegios, ciberlocutorios y centros comunitarios, así como también observaciones virtuales a través de Facebook. Los principales resultados encontrados fueron que las fotos personales y las declaraciones del “estado sentimental” funcionan como elementos centrales para la presentación de sí mismos entre los adolescentes, así como también para motorizar la sociabilidad mediante los comentarios. En cuanto a las principales ventajas y desventajas acerca de conocer a una pareja por Facebook, observamos la importancia del conocimiento de los gustos y preferencias como forma de anticipar un primer acercamiento. A su vez, identificamos los temores al encuentro cara a cara y la desconfianza respecto de lo que se presenta como “verdadero” en los perfiles. Por último, denominamos “discoteca virtual” a la red social, a fin de destacar las transformaciones que se han producido en las interacciones de los adolescentes en torno a la búsqueda de pareja.The aim of this research paper is to explore and describe the ways in which adolescents of popular sectors of Buenos Aires City search for Internet dating through the social network Facebook. For this, we investigate the information they provide in their profiles, the strategies that deploy to seduce and gain visibility in the walls of their community of peers, on the advantages and disadvantages about dating through social network and gender differences. At the methodological level, in this research mixed type, we conducted, on a quantitative level, a survey of adolescents of popular sectors of the City of Buenos Aires (n= 150); on a qualitative level, we have made observations and in-depth interviews to twenty-five adolescents from popular schools, cybers and community centers, as well as virtual observations through Facebook. The main findings were that the personal photos and statements of "feeling state" function as central to the presentation of self among adolescents, as well as for powering the sociability through feedback. As for the main advantages and disadvantages about meeting a couple in Facebook, we observe the importance of knowledge the tastes and preferences as a way to anticipate a first approach. In turn, we identify the fears of a face to face encounter and distrust of what is presented as “true” in the profiles. Finally, we call “virtual club” to the social network, in order to highlight the changes that have occurred in the interactions of adolescents around the matchmaking.Fil: Linne, Joaquín Walter. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Basile, Diego Alejandro. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

School uses of the internet in adolescents from popular sectors

El objetivo de nuestra investigación es explorar los usos de las TIC en adolescentes de sectores populares de la Ciudad de Buenos Aires, en el marco de los programas públicos basados en el modelo One Laptop per Child. La metodología consistió en veinte entrevistas en profundidad, una encuesta (n: 450) y diversas observaciones a adolescentes de sectores medios y populares. Los resultados indican que los adolescentes, tanto de sectores medios como populares, utilizan las mismas plataformas de comunicación y entretenimiento en su tiempo libre. A su vez, que los motiva y les interesa la incorporación de las TIC al ámbito escolar. No obstante, se observa que las condiciones de desigualdad económicas y socio-culturales impactan en el uso escolar de las TIC, reproduciendo la brecha digital.The aim of this research is to explore the uses of ICTs by teenagers in the popular sectors of Buenos Aires, within the framework of public programs based on the model One Laptop per Child. The methodology consisted of twenty in-depth interviews, a survey (n = 450) and observations of teenagers from middle and popular sectors. Results show that teenagers from middle and popular sectors use the same communication and entertainment platforms in their spare time. Also, the incorporation of ICTs in schools motivates and interests them. However, it is noted that conditions of economic and socio-cultural inequality affect the school use of ICTs, reproducing the digital divide.Fil: Basile, Diego Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaFil: Linne, Joaquín Walter. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions

We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 2GeV/c. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B. V.Peer reviewe

Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV

Peer reviewe

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at root s=13 TeV

Peer reviewe