Pure bargaining problems with a coalition structure

The final publication is available at Springer via http://dx.doi.org/10.1007/s41412-016-0007-2We consider here pure bargaining problems endowed with a coalition structure such that each union is given its own utility. In this context we use the Shapley rule in order to assess the main options available to the agents: individual behavior, cooperative behavior, isolated unions behavior, and bargaining unions behavior. The latter two respectively recall the treatment given by Aumann–Drèze and Owen to cooperative games with a coalition structure. A numerical example illustrates the procedure. We provide criteria to compare any pair of behaviors for each agent, introduce and axiomatically characterize a modified Shapley rule, and determine its natural domain, that is, the set of problems where the bargaining unions behavior is the best option for all agents.Peer ReviewedPostprint (author's final draft

Indices of the iterates of R3R^3-homeomorphisms at Lyapunov stable fixed points

Given any positive sequence (\{c_n\}_{n \in {\Bbb N}}), we construct orientation preserving homeomorphisms (f:{\Bbb R}^3 \to {\Bbb R}^3) such that (Fix(f)=Per(f)=\{0\}), (0) is Lyapunov stable and (\limsup \frac{|i(f^m, 0)|}{c_m}= \infty). We will use our results to discuss and to point out some strong differences with respect to the computation and behavior of the sequences of the indices of planar homeomorphisms.Comment: 19 pages, 8 figure

Digital stories and emerging citizens' media practices by migrant youth in Western Sydney

This article provides a critical examination of community media practices by young recently arrived African refugees and Cambodian young migrants in Western Sydney, Australia. Against the backdrop of contemporary cultural politics of migration in Australia the article is grounded on a recent participatory community media research project conducted in 2008-2009, which aimed to conceptualise the emerging spaces for claiming new forms of citizen agency and contest the general representations of newly arrived migrants in the mainstream media. The paper argues that community media is better positioned to recognise changing attitudes towards migrants and refugees, and that these changes must also take place from the bottom up. Extending existing notions of citizens’ media the paper articulates a view that young media practitioners become active citizens in the exercise of their civil and communication rights and their selfrepresentation, by owning the process of content creation and communication, thus redefining the content (rather than the form) of what citizenship means in different social contexts

The Mediations of climate change: museums as citizens’ media

Social research underlines how the mass media frames and presents environmental change and risk in ways that become contested cultural constructs embedded in deep ideological structures. While significant attention has concentrated on the mass media, less consideration has been given to examining the role of museums and science centres in communicating the science of climate change. The article looks at museums as cultural brokers in collaborative efforts around public understandings of climate change. Engaging with recent conceptualizations around citizens and public media practices, it proposes participatory design mechanisms through which the museum sector can act as change-agents in fostering a new form of public pedagogy that incorporates differing civic epistemologies around climate change education and action

Análisis de los factores personales y laborales que contribuyen a los accidentes de la industria de la construcción en el Perú

The purpose of this research is to examine the relationship between individual and occupational risk factors and accidents at road construction sites in Lima, Peru. The research was conducted using a correlational design, analyzing the causes of accidents through safety inspection reports and independent accident investigations. The study population included all employees who suffered lost-time accidents during their workday. Associations between variables were determined using descriptive statistics, inferential statistics, and comparative tables. The results suggest that personal and occupational factors contribute to accidents at road construction sites in Lima, Peru. After the root causes of accidents were identified and addressed, the accident rate decreased significantly in 2017 and 2018. Supervision was found to be the primary means of accident prevention, while leadership is essential to motivate workers to adhere to established standards of conduct.El propósito de esta investigación es examinar la relación entre los factores de riesgos individuales y laborales y los accidentes en las obras de construcción de carreteras en Lima, Perú. La investigación se llevó a cabo mediante un diseño correlacional, analizando las causas de los accidentes a través de informes de inspección de seguridad e investigaciones independientes de accidentes. Se incluyó en la población de estudio a todos los empleados que sufrieron accidentes con baja durante su jornada laboral. Las asociaciones entre variables se determinaron mediante estadísticas descriptivas, estadísticas inferenciales y tablas comparativas. Los resultados sugieren que tanto los factores personales como los laborales contribuyen a los accidentes en las obras de construcción de carreteras en Lima, Perú. Después de que se identificaron y abordaron las causas raíz de los accidentes, la tasa de accidentes disminuyó significativamente en 2017 y 2018. Se determinó que la supervisión es el principal medio de prevención de accidentes, mientras que el liderazgo es esencial para motivar a los trabajadores a adherirse a las normas de conducta establecidas

Caracterización fisicoquímica del agua del estero Nonguén y su confluencia con el río Andalién, región del Biobío. Variación en relación a los distintos usos de suelo en su cuenca.

La cuenca del estero Nonguén es un ejemplo de la realidad que se observa en la mayoría de las cuencas localizadas en zonas urbanas, debido al alto grado de intervención que presenta en su parte baja, influenciada por el constante aumento de la alta densidad poblacional. Sin embargo, en su parte alta aún es posible observar sitios con muy poca intervención que permiten la conservación de ecosistemas acuáticos en condiciones relativamente prístinas. Se realizó una caracterización fisicoquímica del agua del estero Nonguén y de la zona de confluencia con el río Andalién. Los resultados mostraron que la parte alta de la cuenca presenta aguas de muy buena calidad, pero en la parte baja, a medida que la actividad urbana comienza a ser más intensa, esta calidad comienza a disminuir mostrando condiciones fisicoquímicas completamente distintas a las demás zonas evaluadas (ANOSIM, parwise test R = 1; p = 0.333). Palabras clave: calidad de agua, contaminación, cuenca