Risk analysis of PCB exposure via the soil-food crop pathway, and alternatives for remediation at Serpukhov, Russian Federation.

A risk assessment was conducted to determine the likelihood of certain health risks resulting from exposure to soils and food crops contaminated with polychlorinated biphenyl (PCBs). PCBs have contaminated soils, river sediments, and air in the past as a result of industrial activities at a capacitor plant located in the City of Serpukhov, Russian Federation. This risk assessment and suggestions for remediation are designed to aid in decision-making efforts by a joint Russian-American research team developing a community, national, and international response to industrial contamination. Bobovnikova et al. (The Science of the Total Environment 139/140, 357-364, [1993]) have reported that PCBs are elevated in soils and sediments, breast milk, and locally grown foods in the Serpukhov area. Data from these and other investigators have been used in this risk assessment to calculate a potential cancer risk resulting from exposure to PCBs. Our assessment indicates that members of the local population may be at increased risk of cancer, and possibly other adverse health effects, as a result of PCB contamination of their environment. Because previously unassessed environmental contamination is a common problem in the former Soviet Republics, as well as many other areas of the world, we believe this type of evaluation, using known methods, can serve as a model for assessment efforts in other parts of the globe and result in remediative efforts in regions constrained by faltering economies.     

Parental migration and disruptions in everyday life: reactions of left-behind children in Southeast Asia

ABSTRACT

Increasing feminisation of transnational labour migration has raised concerns over potential ‘care crises’ at home, and consequently a ‘care deficit’ for children left in origin countries. Our paper focuses on how left-behind children from Indonesia and the Philippines understand, engage and react to changes in their everyday lives in their parents’ absence. While many children had no say over their care arrangements, some were able to assert their agency in influencing their parents’ decisions and eventually migratory behaviours. Their thoughts and actions reinforce the importance of including children’s views in development and migration studies to improve both the children’s and families’ well-being, and make migration a sustainable strategy for all.     

Gesture in Instruction: Evidence from Live and Video Lessons

Previous studies have shown that teachers’ gestures are beneficial for student learning. In this research, we investigate whether teachers’ gestures have comparable effects in face-to-face live instruction and video-based instruction. We provided sixty-three 7–10 year old students with instruction about mathematical equivalence problems (e.g., 3 + 4 + 5 = __ + 5). Students were assigned to one of four experimental conditions in a 2 × 2 factorial design that varied (1) instruction medium (video vs. live), and (2) instruction modality (speech vs. speech + gesture). There was no main effect of medium: The same amount of learning occurred whether instruction was done live or on video. There was a main effect of modality: Speech instruction accompanied by gesture resulted in significantly more learning and transfer than instruction conveyed through speech only. Gesture’s effect on instruction was stronger for video instruction than live instruction. These findings suggest that there may be a limit to gesture’s role in communication that results in student learning.     

Can Marriage and Relationship Education Be an Effective Policy Tool to Help Low-Income Couples Form and Sustain Healthy Marriages and Relationships? A Review of Lessons Learned

This review summarizes and synthesizes what researchers and practitioners have learned about the potential of public policy support for marriage and relationship education (MRE) to help lower income individuals and couples form and sustain healthy marriages and relationships. In short, this review documents modest, early evidence that low-income couples participate in well-designed MRE programs when they are offered, enjoy the educational experience, and report that the program is helpful. Practitioners have been going through a fast and steep learning process to figure out how best to recruit and maintain participation and adapt curricula to meet unique needs and situations. The evidence from the early outcome studies provides some support for the notion that MRE programs can have positive, modest effects on low-income couples' relationships, at least in the short run. However, much more research is needed to answer this question more definitively. Fortunately, more high-quality evaluation research will be coming over the next few years.     

Real-time threat assessment based on hidden Markov models

An essential factor toward ensuring the security of individuals and critical infrastructures is the timely detection of potentially threatening situations. To this end, especially in the law enforcement context, the availability of effective and efficient threat assessment mechanisms for identifying and eventually preventing crime- and terrorism-related threatening situations is of utmost importance. Toward this direction, this work proposes a hidden Markov model-based threat assessment framework for effectively and efficiently assessing threats in specific situations, such as public events. Specifically, a probabilistic approach is adopted to estimate the threat level of a situation at each point in time. The proposed approach also permits the reflection of the dynamic evolution of a threat over time by considering that the estimation of the threat level at a given time is affected by past observations. This estimation of the dynamic evolution of the threat is very useful, since it can support the decisions by security personnel regarding the taking of precautionary measures in case the threat level seems to adopt an upward trajectory, even before it reaches the highest level. In addition, its probabilistic basis allows for taking into account noisy data. The applicability of the proposed framework is showcased in a use case that focuses on the identification of potential threats in public events on the basis of evidence obtained from the automatic visual analysis of the footage of surveillance cameras.     

Debt,precarity and gender: male and female temporary labour migrants in Singapore

As one of Asia’s key hubs for transient workers, Singapore’s migration regime creates particularly gendered streams of labour, especially among lower skilled occupations, as is apparent in two key sectors – domestic work and construction work. Drawing on surveys with Bangladeshi construction workers and Indonesian domestic workers based in Singapore, as well as in-depth interviews with each group, this paper examines gendered issues of temporary labour migration, precarity and risk, as they occur against a backdrop of migrant indebtedness. In this paper, we argue that migrant indebtedness occurs along a spectrum that ranges from less visible, or what we call ‘silently’ incurred forms of debt, through to more ‘resonant’ types of debt that are acquired upfront and thus more readily quantifiable. Using this spectrum of migrant indebtedness, we aim to complicate debates about debt-financed migration by underscoring the ways in which notions of debt and unfreedom can be imbricated with both constraints and opportunities for migrants’ agency.     

Racial Imagery and Support for Voter ID Laws

Previous research suggests that calls for voter ID laws include racialized appeals and that racial attitudes influence support for such laws. This study uses an experiment to test whether exposure to racial imagery also affects support for voter ID laws. The data come from a survey experiment embedded in the 2012 Cooperative Congressional Election Study (N = 1,436) randomizing the race of a voter and poll worker shown to respondents (African American voter and poll worker, white voter and poll worker, or no image). The results show that white respondents who saw an image of an African American voter and poll worker expressed greater support for voter ID laws than those in the no image condition, even after controlling for the significant effects of racial resentment and political ideology. Exposure to an image of a white voter and poll worker did not produce a similar effect. The findings provide new evidence that public opinion about voter ID laws is racialized.     

Spatial Planning and the Traditional Settlements Management: Evidence from Visibility Analysis of Traditional Settlements in Cyclades,Greece

ABSTRACT

Traditional settlements constitute part of the cultural heritage and their preservation is an important priority, acknowledged in the present study as a multidisciplinary, multi-scale and complex issue. This study quantifies the visual impact of traditional settlements in Cyclades that arise from structures which are considered to create pressure on the island landscape and negative visual impact. These structures disrupt the landscape continuity; they are both incongruous with the dominant local scale and incompatible with the forms and shapes that are appropriate on the Cyclades islands. This paper examines these issues in the context of the management of insular traditional settlements within the Greek spatial planning framework.     

Risk Analysis of PCB Exposure via the Soil–Food Crop Pathway, and Alternatives for Remediation at Serpukhov, Russian Federation

A risk assessment was conducted to determine the likelihood of certain health risks resulting from exposure to soils and food crops contaminated with polychlorinated biphenyl (PCBs). PCBs have contaminated soils, river sediments, and air in the past as a result of industrial activities at a capacitor plant located in the City of Serpukhov, Russian Federation. This risk assessment and suggestions for remediation are designed to aid in decision-making efforts by a joint Russian–American research team developing a community, national, and international response to industrial contamination. Bobovnikova et al. ( The Science of the Total Environment 139/140 , 357–364, [1993]) have reported that PCBs are elevated in soils and sediments, breast milk, and locally grown foods in the Serpukhov area. Data from these and other investigators have been used in this risk assessment to calculate a potential cancer risk resulting from exposure to PCBs. Our assessment indicates that members of the local population may be at increased risk of cancer, and possibly other adverse health effects, as a result of PCB contamination of their environment. Because previously unassessed environmental contamination is a common problem in the former Soviet Republics, as well as many other areas of the world, we believe this type of evaluation, using known methods, can serve as a model for assessment efforts in other parts of the globe and result in remediative efforts in regions constrained by faltering economies.