Risk Associated with Transportation of Spent Nuclear Fuel Under Demanding Security Constraints: The Colombian Experience

This note describes some of the safety and security concerns posed by the transportation of highly enriched uranium (HEU) from a nuclear research reactor located in Bogota (Colombia) to a port on the Colombian Caribbean coast. The operation was made at a moment of extremely high guerilla activity in Colombia, so that the decision-problem belongs in the extension of risk analysis known as threat analysis. By invoking a principle of dispreference for probability based on the concept of stochastic dominance, a qualitative risk comparison was made between the road and air alternatives.     

Integrating language‐and‐culture teaching: an investigation of Spanish teachers' perceptions of the objectives of foreign language education

A recent shift has been noticeable in foreign language education theory. Previously, foreign languages were taught as a linguistic code. This then shifted to teaching that code against the sociocultural background of, primarily, one country in which the foreign language is spoken as a national language. More recently, teaching has reflected on language and culture in an integrated way with a view to preparing learners to use the foreign language in intercultural contact situations. Though in many countries national curricula for the teaching of foreign languages have been slow in the uptake of this shift in thinking, recent curricular guidelines tend to focus more explicitly on the sociocultural dimension of foreign language education, distinguishing between cognitive, attitudinal and behavioural objectives to be attained in the area of language‐and‐culture teaching. This change in focus in curricular guidelines entails a change in the expectations voiced towards foreign language teachers. Research on innovation in education has shown that teachers' perceptions of the innovation to a large extent determine the success of that innovation. This paper reports on an investigation among Spanish secondary school EFL teachers, focusing on the extent to which teachers support the new culture‐and‐language teaching objectives. Our findings suggest that teachers are willing to support the new objectives, but that they experience conflicts when having to prioritize language teaching and culture teaching objectives.     

Familles of confidence bands for the survival function under the general random censorship model and the Koziol-Green model

Familles of asymptotic 100(1 – α)% level confidence bands for the survival function under the general random right-censorship (GRC) model and the proportional-hazards model of random right-censorship, also known as the Koziol-Green (KG) model, are developed. The family of bands under the GRC model is based on the well-known product-limit estimator (PLE), and this family is rich in that it contains as special cases the bands of Hall and Wellner (1980) and Gillespie and Fisher (1979), and more generally, the GF-type and HW-type bands of Csörg? and Horváth (1986), as well as new bands not previously studied. The familles of bands under the KG model are based on the maximum-likelihood estimator of F under this particular model. We compare the PLE-based bands and the MLE-based bands under the KG model. This enables us to study the loss in efficiency of the former bands when used in a setting where they are not optimal. The notion of asymptotic relative width efficiency (ARWE), defined to be the limiting ratio of the sample sizes needed by the bands to achieve the same asymptotic widths, is employed to compare two bands. Through this efficiency measure it is shown that if the censoring parameter β is known, then the PLE-based bands are highly inefficient relative to the MLE-based bands when β is large. When β is not known, the MLE-based bands are asymptotically conservative. Despite their conservatism, they still dominate the PLE-based bands when β is not too small or equivalently when the degree of censoring is not too light. We also compare the various PLE-based bands under the GRC model. The resulting information is valuable for evaluating competing PLE-based bands. We illustrate the confidence bands by utilizing the well-known Channing House data.     

On identifiability of parametric statistical models

Summary This is a review article on statistical identifiability. Besides the definition of the main concepts, we deal with several questions relevant to the statistician: parallelism between parametric identifiability and sample sufficiency; relationship of identifiability with measures of sample information and with the inferential concept of estimability; several strategies of making inferences in unidentifiable models with emphasis on the distinct behaviour of the classical and Bayesian approaches. The concepts, ideas and methods discussed are illustrated with simple examples of statistical models. Centro de Análise e Processamento de Sinais da UTL     

Posterior robustness with more than one sampling model

In order to robustify posterior inference, besides the use of large classes of priors, it is necessary to consider uncertainty about the sampling model. In this article we suggest that a convenient and simple way to incorporate model robustness is to consider a discrete set of competing sampling models, and combine it with a suitable large class of priors. This set reflects foreseeable departures of the base model, like thinner or heavier tails or asymmetry. We combine the models with different classes of priors that have been proposed in the vast literature on Bayesian robustness with respect to the prior. Also we explore links with the related literature of stable estimation and precise measurement theory, now with more than one model entertained. To these ends it will be necessary to introduce a procedure for model comparison that does not depend on an arbitrary constant or scale. We utilize a recent development on automatic Bayes factors with self-adjusted scale, the ‘intrinsic Bayes factor’ (Berger and Pericchi, Technical Report, 1993).     

Soft Repression and the Current Wave of Social Mobilisations in Spain

The current political and economic crisis has fuelled a new cycle of collective action in Spain. The response of the Spanish authorities to this wave of mobilisations has been to strengthen public order. But on some occasions, the excessive use of police force has given rise to problems of image for the Spanish government. To avoid public criticism, the Ministry of the Interior has tried to camouflage police repression by combining the use of truncheons with other, more subtle, coercive measures. The silent nature of such repressive tactics means that their existence is rarely discussed in the specialised literature, which tends to focus on the violent acts committed by the State. However, this type of ‘soft repression’ plays an important pre-penal role within the official strategies to contain the new and challenging social conflict in Spain.     

独立学院大学生创业教育现状调查研究——以徐州地区独立学院为例

独立学院学生就业形势严峻,实施＂以创业促进就业＂是解决这一问题的重要途径之一。为了深入了解独立学院大学生创业教育的具体情况,以江苏徐州地区独立学院的学生为调查对象,通过问卷调研、分析,对独立学院大学生创业现状进行了概述,并对独立学院大学生创业教育提出了建议。     

Who will give effect to the ILO's Maritime Labour Convention, 2006?

The Maritime Labour Convention, 2006, which takes effect on 20 August 2013, consolidates dozens of ILO standards adopted since the 1920s. It has been described as the “fourth pillar” of the international maritime regulatory regime, alongside three major IMO Conventions on safety at sea and marine pollution control. The challenge, the authors argue, will be to enforce it within the existing inspection frameworks of flag State implementation and “port State control”. Technically, the responsibility rests on the former, but the proliferation of flags of convenience suggests that the latter will have a crucial part to play too, as will, in either case, inspector training.     

The economy of risk and respect: Accounts by Puerto Rican sex workers of HIV risk taking

Three‐hundred eleven female drug‐using sex workers in urban Puerto Rico were asked to describe their last negotiation with a client. They described efforts to protect themselves from many hazards of sex work, including violence, illness, and drug withdrawal. They also described efforts to minimize the stigma and marginalization of sex work by cultivating relationships with clients, distinguishing between types of clients, and prioritizing their role as mothers. Sex workers adopted alternating gender roles to leverage autonomy and respect from clients. Their narratives suggest that sex workers negotiate a world in which HIV is relative to other risks, and in which sexual practices which are incomprehensible from an HIV‐prevention perspective are actually rooted in a local cultural logic. Future HIV prevention efforts should frame condom use and other self‐protective acts in terms that build upon sex workers' own strategies for understanding their options and modifying their risks.