Las imágenes y la construcción de significados, durante la huelga docente bonaerense, en los perfiles de la red social Facebook

Este trabajo recorre diversas formas de comunicar ideas, actividades, cotidianidades, sentimientos del colectivo integrado por docentes, en la red social Facebook, durante los 17 días de huelga docente en la Provincia de Buenos Aires en el inicio del ciclo lectivo 2014. El recorte de la investigación se realiza en diversos grupos cerrados, secretos y públicos que utilizaron los diversos actores mencionados en el FB, en el Partido de General Pueyrredon y Mar Chiquita. Indagamos qué cambios y continuidades existieron en los perfiles durante la huelga docente, sus recorridos, sus reclamos a través de las fotos, selfies, imágenes rumorales y videos publicados, los cambios de portadas y de las fotos de perfiles. Transitamos estas publicaciones desde los días previos a la medida de fuerza hasta el día de cobro de haberes con el aumento otorgado, después del conflicto docente. En este lapso se analiza la conflictiva de los docentes, a través de las imágenes utilizadas y sus repercusiones en la red, como así también, si estas expresiones virtuales aportan, movilizan, innovan, desestructuran o ratifican los enmarcamientos que construyen los trabajadores docentes.Fil: Fixman, Viviana Silvia. Universidad Nacional de Quilme

Wind Energy: Do the Benefits Outweigh the Costs?

As wind energy continues to increase in demand, research to reduce the overall impact of turbines on birds will greaten, resulting in lower turbine‐induced avian and bat mortality. It is important that wind energy continues to increase in energy production per year, as it is one of the safest and most viable renewable energy sources available today

Diffusion-Controlled Intrachain Reactions of Polymers. I Theory

A theory of diffusion-controlled intramolecularly catalyzed reactions of polymer chains in dilute solution is formulated. A closure approximation yields a soluble integral equation for (essentially) the transient rate of the reaction. The time dependent solution consists of a sum of simple exponential terms whose coefficients and decay constants can be readily calculated. The theory is also applied to luminescence quenching and ring-chain interconversion

Diffusion-Controlled Intrachain Reactions of Polymers. II Results for a Pair of Terminal Reactive Groups

The formulas and results of the preceding paper are used to calculate the rate of reaction between reactive groups attached to the ends of a polymer chain. Extensive numerical calculations have been made for both transient rate processes and steady state luminescence quenching. The results are restricted to chains in dilute solution, in either the free draining or nondraining limits and with no excluded volume forces present. A discussion of the qualitative effects of excluded volume forces on the results is included. The results suggest that experimental studies of these processes may be feasible

Comparison of Feature Extraction Methods and Predictors for Income Inference

Abstract—Patterns of mobile phone communications, coupled with the information of the social network graph and financial behavior, allow us to make inferences of users’ socio-economic attributes such as their income level. We present here several methods to extract features from mobile phone usage (calls and messages), and compare different combinations of supervised machine learning techniques and sets of features used as input for the inference of users’ income. Our experimental results show that the Bayesian method based on the communication graph outperforms standard machine learning algorithms using nodebased features.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Comparison of Feature Extraction Methods and Predictors for Income Inference

Patterns of mobile phone communications, coupled with the information of the social network graph and financial behavior, allow us to make inferences of users' socio-economic attributes such as their income level. We present here several methods to extract features from mobile phone usage (calls and messages), and compare different combinations of supervised machine learning techniques and sets of features used as input for the inference of users' income. Our experimental results show that the Bayesian method based on the communication graph outperforms standard machine learning algorithms using node-based features.Comment: Argentine Symposium on Big Data (AGRANDA), September 5, 201

Convective Depletion During The Fast Propagation Of A Nanosphere Through A Polymer Solution

A theory of nonlinear convective depletion is set up as a nanosphere translates fast through a semidilute polymer solution. For nanospheres a self-consistent field theory in the Rouse approximation is often legitimate. A self-similar solution of the convective depletion equation is argued to be feasible at high velocities. The nature of the thin boundary layer in front of the propagating particle is analyzed. One example of convective depletion is when a charged protein moves through a semidilute polymer under the influence of a high electric field. The protein velocity is then proportional to the fifth power of the field. The theory could be useful in interpreting the separation of protein mixtures by microchip electrophoresis.Comment: 12 pages, 2 figure

Самый компактный. Новый павильон для сквоша: игра открыта для зрителей!

TPoint and ASB have created a pure and simple transparent functionality concept that is turning squash from a limited indoor game to a dynamic outdoor success. This concept is embodied in the world’s first smart outdoor squash courts.Компания TPoint совместно с компанией ASB создали простую функциональную концепцию: сквош превращается из игры в закрытом помещении в динамичный вид спорта, которым можно заниматься за пределами спортивных центров. Эта концепция воплотилась в «умных» сквош-кортах, впервые в мировой практике находящихся вне помещения

Inference of Socioeconomic Status in a Communication Graph

In this work, we examine the socio-economic correlations present among users in a mobile phone network in Mexico. First, we find that the distribution of income for a subset of users –for which we have income information given by a large bank in Mexico– follows closely, but not exactly, the income distribution for the whole population of Mexico. We also show the existence of a strong socio-economic homophily in the mobile phone network, where users linked in the network are more likely to have similar income. The main contribution of this work is that we leverage this homophily in order to propose a methodology, based on Bayesian statistics, to infer the socio-economic status for a large subset of users in the network (for which we have no banking information). With our proposed algorithm, we achieve an accuracy of 0.71 in a two-class classification problem (low and high income) which significantly outperforms a simpler method based on a frequentist approach. Finally, we extend the two-class classification problem to multiple classes by using the Dirichlet distribution.Sociedad Argentina de Informática e Investigación Operativa (SADIO