Uncertainty Evaluation of Human Risk Analysis (HRA) of Chemicals by Multiple Exposure Routes

The application of an ISO standard procedure (Guide to the Expression of Uncertainty in Measurement (GUM)) is here discussed to quantify uncertainty in human risk estimation under chronic exposure to hazardous chemical compounds. The procedure was previously applied to a simple model; in this article a much more complex model is used, i.e., multiple compound and multiple exposure pathways. Risk was evaluated using the usual methodologies: the deterministic reasonable maximum exposure (RME) and the statistical Monte Carlo method. In both cases, the procedures to evaluate uncertainty on risk values are detailed. Uncertainties were evaluated by different methodologies to account for the peculiarity of information about the single variable. The GUM procedure enables the ranking of variables by their contribution to uncertainty; it provides a criterion for choosing variables for deeper analysis. The obtained results show that the application of GUM procedure is easy and straightforward to quantify uncertainty and variability of risk estimation. Health risk estimation is based on literature data on a water table contaminated by three volatile organic compounds. Daily intake was considered by either ingestion of water or inhalation during showering. The results indicate one of the substances as the main contaminant, and give a criterion to identify the key component on which the treatment selection may be performed and the treatment process may be designed in order to reduce risk.     

A synergy of contemporary activism to address police maltreatment of Black males: An intersectional analysis

ABSTRACT

A panoramic overview of contemporary and historical activism to address the perennial tension between police and young Black males in the United States of America is extensively articulated. Furthermore, an intersectional analysis framework is utilized to provide, and explain the unintentional synergy of activism among different groups in the Black community such as the Black Lives Matter movement, the inveterate political class, and the venerable Black church to mitigate police maltreatment of Black males during the era of the nation’s first Black president. Moreover, we discuss the various aggressive policing tactics used in maltreating Black males, some criminal justice reforms achieved in the last eight years, and more importantly we offer suggestions to improve the relationship between police and the Black community.     

A developmental perspective on the Virginia Student Threat Assessment Guidelines

The Virginia Student Threat Assessment Guidelines were developed to help multidisciplinary school-based teams use a decision tree to evaluate student threats and take appropriate preventive action. A main goal of this approach is to allow school-based teams to recognize and respond to the developmental complexities of children and adolescents without resorting to the use of zero tolerance discipline. The model takes a triage approach that involves progressively more extensive assessment and intervention according to the severity of the threat and the student's intentions. The article summarizes two field test studies of the model, a study of training effects on staff attitudes and knowledge about violence prevention, and a quasi-experimental study showing that secondary schools using the model enjoyed a more positive school climate characterized by less bullying and greater willingness among students to seek help for threats of violence.     

Imagining contact reduces prejudice in preschool children

We examined the effectiveness of an imagery‐based strategy designed to reduce prejudice in preschoolers in Italy. Three studies involving different target groups (disabled children, Black children) were conducted within Italian preschools. Children (4–6 years) were asked to imagine and draw meeting an outgroup member (Studies 1 and 2) or to imagine writing a letter to an outgroup member (Study 3). Results revealed that preschoolers in the experimental condition, relative to a control group, reported less intergroup bias in the form of contact intentions and resource allocation as well as greater behavioral inclusiveness; effects were mediated by improved intergroup attitudes. Our findings are important in understanding ways that promote positive intergroup relations in ways that align with the interests of young children.     

The political economy of fraud in a globalised industry: the case of seafarers' certifications

This paper reports on the first systematic and international investigation of the fraudulent trade in seafarers’ certifications of competence. The shipping industry more than any other traditional industry has been transformed by globalisation, so that there is now effectively a single global labour market for seafarers. International regulation of labour standards in the industry is extensive, but so is regulatory avoidance. This paper seeks to investigate the political economy of fraud, through an exploration of the links between economic features of the globalised shipping industry and regulatory avoidance of labour standards.     

Condom use self-efficacy among U.S. and foreign-born Latinos in Texas

The objective of this study was to assess the influence of condom use self-efficacy on the reported condom use of Latinos. We conducted a rapid needs assessment study among U.S. and foreign-born Latinos living in Houston, TX, to identify behavioral and psychosocial factors that influence their risk for HIV. Bilingual Latino interviewers conducted confidential face-to-face interviews with individuals living in apartment complexes or residential areas primarily populated by Latinos. A total of 152 participants completed the survey. Regression results indicate that education and gender influenced condom use self-efficacy, which in turn influenced condom use in the last sexual encounter and with the primary sexual partner. However, gender and relationship risk were stronger predictors of condom use. Study results indicate that there are differences in condom use self-efficacy and sexual risk behaviors between Latino men and women that need further exploration.     

Decrease in restraint use in a study of a geropsychiatric unit

1. Traditional and nontraditional interventions were used in this study. 2. There was a reduction in the number of times restraints were used, as well as in the number of patient placed in restraints. 3. Further research is needed to find more humane ways to help older adults through acute crisis episodes.     

Comparison of bootstrap estimation intervals to forecast arithmetic mean and median air passenger demand

The aim of this paper is to compare passenger (pax) demand between airports based on the arithmetic mean (MPD) and the median pax demand (MePD). A three phases approach is applied. First phase, we use bootstrap procedures to estimate the distribution of the arithmetic MPD and the MePD for each block of routes distance; second phase, we use percentile, standard, bias corrected, and bias corrected accelerated methods to calculate bootstrap confidence bands for the MPD and the MePD; and third phase, we implement Monte Carlo (MC) experiments to analyse the finite sample performance of the applied bootstrap. Our results conclude that it is more meaningful to use the estimation of MePD rather than the estimation of MPD in the air transport industry. By carrying out MC experiments, we demonstrate that the bootstrap methods produce coverages close to the nominal for the MPD and the MePD.