Artículos con la etiqueta ‘Internet’

La guerra abierta de Enrique Peña Nieto contra internet

Por • 2 abr, 2014 • Category: Política

Parafraseando al ex gobernador de Veracruz Fidel Herrera Beltrán, el Partido Revolucionario Institucional cumple 85 años en la plenitud de su “pinche poder”. Tras 12 años de ausencia en el gobierno federal, el PRI ha retomado el control de las decisiones políticas. Ninguna institución llega a esa edad sin haber adaptado sus objetivos. Su clave no está tanto en adoptar cambios radicales en los métodos políticos, sino en adaptarlos a las actuales circunstancias. En el centro de la estrategia priísta ha estado el férreo control de los medios de comunicación y el acallamiento de las voces críticas para cerrar la pinza alrededor de la libertad de expresión.

Trends in Computer Network Modeling Towards the Future Internet

Por • 6 mar, 2014 • Category: Ciencia y tecnología

This article provides a taxonomy of current and past network modeling efforts. In all these efforts over the last few years we see a trend towards not only describing the network, but connected devices as well. This is especially current given the many Future Internet projects, which are combining different models, and resources in order to provide complete virtual infrastructures to users. An important mechanism for managing complexity is the creation of an abstract model, a step which has been undertaken in computer networks too. The fact that more and more devices are network capable, coupled with increasing popularity of the Internet, has made computer networks an important focus area for modeling. The large number of connected devices creates an increasing complexity which must be harnessed to keep the networks functioning.

Critical Transitions in Social Network Activity

Por • 3 ago, 2013 • Category: sociologia

A large variety of complex systems in ecology, climate science, biomedicine and engineering have been observed to exhibit tipping points, where the internal dynamical state of the system abruptly changes. For example, such critical transitions may result in the sudden change of ecological environments and climate conditions. Data and models suggest that some of these drastic events may be preceded by detectable early-warning signs. This view is also corroborated by abstract mathematical theory for generic bifurcations in stochastic multi-scale systems. Whether early-warnings are also present in social networks that anticipate \textit{a-priori unknown} events in society is an open problem to which only highly speculative answers can be given at present. Here, we focus on \textit{a-priori known} events and analyze a social network data set with a focus on classical variance and autocorrelation warning signs. We find that several a-priori known events are preceded by variance and autocorrelation growth as predicted by mathematical theory.

Cybespace and Future: Issue Coming to Fore

Por • 27 jul, 2013 • Category: Opinion

In actuality, this approach is meant to forever preserve the dominant position of the U.S. in this field without allowing new players to enter it. Over 10 years ago, American political scientist J. Nye, the author of the term «soft power», noted in his research that in the new world the U.S. should replace its outdated «nuclear umbrella» with a more modern and promising «informational» one. This is because the U.S. has unique abilities to collect and process data, and accordingly the U.S. can decide to whom it will transmit this information and to whom it will not, who will receive an informational advantage and who will remain in a state of artificial «informational containment». And it seems that Washington is consistently applying this concept in its activities

Internet en Venezuela es más lento que en Haití

Por • 9 abr, 2013 • Category: Nacionales

Cantv reconoce que velocidad de conexión no es suficiente para demanda de usuarios

Truthy: Enabling the Study of Online Social Networks

Por • 26 dic, 2012 • Category: sociologia

The broad adoption of online social networking platforms has made it possible to study communication networks at an unprecedented scale. Digital trace data can be compiled into large data sets of online discourse. However, it is a challenge to collect, store, filter, and analyze large amounts of data, even by experts in the computational sciences. Here we describe our recent extensions to Truthy, a system that collects Twitter data to analyze discourse in near real-time. We introduce several interactive visualizations and analytical tools with the goal of enabling citizens, journalists, and researchers to understand and study online social networks at multiple scales.

Joint Scaling Theory of Human Dynamics and Network Science

Por • 13 sep, 2012 • Category: Opinion

The increasing availability of large-scale data on human behavior has catalyzed simultaneous advances in network theory, capturing the scaling properties of the interactions between a large number of individuals, and human dynamics, quantifying the temporal characteristics of human activity patterns. These two areas remain disjoint, however, traditionally each pursuing as a separate modeling framework. Here we establish the first formal link between these two areas by showing that the exponents characterizing the degree and link weight distribution in social networks can be expressed in terms of the dynamical exponents characterizing human activity patterns. We test the validity of these theoretical predictions on datasets capturing various facets of human interactions, from mobile calls to tweets. We find evidence of a universal measure, that links networks and human dynamics, but whose value is independent of the means of communication, capturing a fundamental property of human activity.

Velocidades de Internet Venezuela vs. El Mundo

Por • 27 may, 2012 • Category: Nacionales

Podemos iniciar diciendo que el promedio de velocidad de descarga de información en Venezuela considerando todos los proveedores de acceso a la Internet es de solo 1.69 Mbps, esto nos ubica en laposición 149 de un total de 176 países del mundo desde los cuales se hacen estas mediciones, siendo solo superados en peor velocidad por países muy atrasados al respecto como Malawi, Bolivia, Irán, Bostwana, Argelia, Bangladesh y Afganistán entre otros muy pocos. Ahora bien, el principal proveedor de acceso a Internet es CANTV Servicios que tiene un promedio de descargas de 0,71 Mbps lo que nos ubica (para la mayoría de los Venezolanos) en la muy penosa posición 175 de 176 países!!!.

Epidemic spreading on interconnected networks

Por • 7 mar, 2012 • Category: sociologia

Many real networks are not isolated from each other but form networks of networks, often interrelated in non trivial ways. Here, we analyze an epidemic spreading process taking place on top of two interconnected complex networks. We develop a heterogeneous mean field approach that allows us to calculate the conditions for the emergence of an endemic state. Interestingly, a global endemic state may arise in the coupled system even though the epidemics is not able to propagate on each

Social Capital and Individual Performance: A Study of Academic Collaboration

Por • 17 ene, 2012 • Category: Ambiente

Studies on social networks highlight the importance of network structure or structural properties of a given network and its impact on performance outcome. One of the important properties of this network structure is referred as «social capital» which is the «network of contacts» and the associated values attached to these networks of contacts. In this study, our aim is to provide empirical evidence of the influence of social capital and performance within the context of academic collaboration. We suggest that the collaborative process involves social capital embedded within relationships and network structures among direct co-authors. Thus, we examine whether scholars’ social capital is associated with their citation-based performance, using co-authorship and citation data. In order to test and validate our proposed hypotheses, we extract publication records from Scopus having «information science» in their title or keywords or abstracts during 2001 and 2010.