Influence of urbanization on the occurrence and activity of aerial insectivorous bats

Activity and species-specific responses of insectivorous bats in different urban-forest conditions provides a general perspective on the adaptability and vulnerability of bat species towards urbanization intensity. Here we evaluated species richness and activity patterns of aerial insectivorous bats across an urbanized landscape in the highlands of Chiapas, in Mexico. Acoustic monitoring of echolocation calls was conducted for 27 nights over a period of four months. Species richness and relative activity of insectivorous bats were estimated in a landscape with different conditions of urbanization intensity: urban areas, non-urban and forest areas. We identified a total of 14 bat species and three phonotypes. Bat species richness and relative activity was similar (X² = 0.568, gl = 2, p > 0.05), but species composition differed among conditions. We observed a significant higher occurrence of Bauerus dubiaquercus, Eptesicus brasiliensis and Myotis californicus in forest sites. Urban sites presented higher occurrence of Molossus rufus and phonotype Molossidae 2, while non-urban sites presented a higher occurrence of Eptesicus furinalis and phonotype Molossidae 2. We were able to identify bat species according to their relative activity in relation todifferent landscape conditions. Species of the Molossidae family presented the highest activity in urban sites, which was positively affected by the number of streetlights, while species of the Vespertilionidae presented the highest activity in forest sites, which was positively related totree density. While urbanization tends to diminish native biodiversity and alter faunal communities, our results show a similar richness and relative activity of aerial insectivorous bats along the urban ecosystem. The effect of urbanization intensity becomes more apparent in species-specific bat activity; the response of species towards particular habitat conditions depends on local habitat quality and characteristics (i.e., presence of streetlights, vegetation cover and tree density).     

What is the right way to protest? On the process of justification of protest,and its relationship to the propensity to participate in different types of protest

This study explores how citizens in Spain perceive different tactics employed in anti-austerity protests in 2011–2013, and tests the model of the process of justification of protest. This model combines the elements of Gamson’s collective action frames theory (effectiveness, anger and grievances, operationalized as appraisal of harm) with the concept of legitimacy. It also links justification to the intention to participate. We empirically differentiate between three protest tactics: normative demonstrations, non-normative peaceful strategies, and non-normative violent actions. We find that demonstrations are perceived to be more legitimate, but less effective than non-normative peaceful protests. Violent strategies, on the other hand, are seen to be more effective than legitimate. We postulate and find that legitimacy and effectiveness partially or fully mediate the impact of political ideology, anger, and appraisal of harm on the probability of participation in non-normative protest. Finally, we establish meaningful differences in the predictors of the likelihood of joining normative, non-normative peaceful, or non-normative violent protests. Overall, our results suggest that the study of justification of collective action and especially, the inclusion of the notion of legitimacy, enriches our understanding of the popular approval of and propensity to participate in different forms of collective protest.     

Friendship,humour and non-native language: Emotions and experiences of professional migrants to Australia

This article explores a particular consequence of migration, which is the need to make new friends in a new country. Migration scholars tend to ignore the process of making friends, when this can be a key challenge to integrating in a new society. We draw on semi-structured interviews with professional migrants to Australia, from a range of different countries, to explore how using non-native language impacted on new friendships. In particular, using the sociological lens of ‘facework’, we show how humour was used during new friendships with English speakers [Goffman, E. 1969. Where the Action Is: Three Essays. London: Allen Lane]. Non-native language confidence impacted on informal socialising because migrants encountered challenges using humour with new friends. This led to feelings of embarrassment, which had to be emotionally managed. Despite speaking good English, these non-native English language migrants can still face language challenges in informal settings. As the migrant's length of time in Australia increased, language confidence improved, however, there were still barriers when using humour. Whilst analysis is specific to Australia, given the increased numbers of professional migrants globally, further investigation is needed to explore if non-native English migrants to other similar cultures such as England, the USA, or Canada also experience such barriers to integration at local level.     

Sequential design of computer experiments for the estimation of a probability of failure

This paper deals with the problem of estimating the volume of the excursion set of a function f:ℝ ^d →ℝ above a given threshold, under a probability measure on ℝ ^d that is assumed to be known. In the industrial world, this corresponds to the problem of estimating a probability of failure of a system. When only an expensive-to-simulate model of the system is available, the budget for simulations is usually severely limited and therefore classical Monte Carlo methods ought to be avoided. One of the main contributions of this article is to derive SUR (stepwise uncertainty reduction) strategies from a Bayesian formulation of the problem of estimating a probability of failure. These sequential strategies use a Gaussian process model of f and aim at performing evaluations of f as efficiently as possible to infer the value of the probability of failure. We compare these strategies to other strategies also based on a Gaussian process model for estimating a probability of failure.     

Senegalese migration to Spain: transnational mothering practices

This article analyses the relationship between pre-migration fostering practices and the transnational strategies of a group of Senegalese mothers living in Spain. In Senegal, large households, residential separation of couples, and collective fostering are the norm; it is not unusual for children to be under the care of women other than their mother, even for long periods of time. Drawing from data collected during 2 years of transnational multi-sited fieldwork that followed Senegalese mothers between their households of origin and destination, we argue that these women sought to reproduce the Senegalese mainstream mothering ideology in Spain. They did this by adopting two main strategies: long-distance mothering and circular mothering. These strategies were used depending on the age of the child, the constraints imposed on mother and children by migration legislation, and the social capital available to the migrant. This article seeks to integrate a wider range of experiences and the influence of pre-migratory mothering ideologies, kinship systems, and household structures on transnational mothering practices into the existing literature on transnational mothering.     

Convergence properties of the expected improvement algorithm with fixed mean and covariance functions

This paper deals with the convergence of the expected improvement algorithm, a popular global optimization algorithm based on a Gaussian process model of the function to be optimized. The first result is that under some mild hypotheses on the covariance function k of the Gaussian process, the expected improvement algorithm produces a dense sequence of evaluation points in the search domain, when the function to be optimized is in the reproducing kernel Hilbert space generated by k  . The second result states that the density property also holds for P-almost$\mathsf{P}\text{-almost}$ all continuous functions, where P is the (prior) probability distribution induced by the Gaussian process.     

Evolution of an urban epidemic: The first 100,000 AIDS cases in New York City

Between 1981 and August 1997, 100,000 AIDS cases were reported in New York City (NYC): 77,067 men, 20,818 women, 307 teenagers, and 1,808 children. This report examines AIDS trends in NYC as the epidemic evolved from a predominantly white male epidemic among men with same sex contact (MSM) mostly from a single borough to a geographically diffuse epidemic that includes injecting drug users (IDU), persons of color, and women infected heterosexually. Case data were collected by active surveillance methods augmented by electronic laboratory based reporting. Mortality data were obtained from NYC Vital Statistics. 1990 Census data were used to derive incidence rates and prevalence by neighborhood income. Rates per 100,000 adults by neighborhood ranged from 260 to 5,500. Total AIDS incidence peaked in 1993 and has subsequently declined. Among men there was a shift from MSM to IDU as the predominant risk group, and increasing incidence among men reporting heterosexual contact. IDU was the leading risk factor among women, and women increased from 8 to 30 percent of all cases between 1982 and 1997. Unlike incidence, AIDS prevalence is rising among socially and economically marginalized populations, and will remain a major public health challenge well into the next century.     

An Understanding of Abuse in the Hispanic Older Person: Assessment, Treatment, and Prevention

This article offers a discussion of abuse in the Hispanic older person population, conceptualized from within a cultural framework including assessment and treatment. Basic cultural values such as familism, marianismo, machismo, and respeto are considered essential elements to the understanding of this framework. Acculturation, migration, and socioeconomic factors are also presented as important factors in the understanding of this problem. This article emphasizes how expectations based on cultural aspects and values can unintentionally increase the risk of neglect and/or abuse. The concepts of caregiver stress and dependency widely discussed in the older person abuse literature are integrated in the discussion of older person abuse in the Hispanic.