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The aim of this study was to investigate the effects of perceived organizational support (POS) on the relationships between volunteer job satisfaction, attitude toward volunteering and continuance intention. Also, this study investigated the moderating role of volunteer age in the relationships between study variables.

Participants were recruited from volunteers in the Rio 2016 Olympic Games and/or the Rio 2016 Paralympic Games (N = 4,824). Data were primarily analyzed using the partial least squares structural equation modeling (PLS-SEM) and multigroup analysis (PLS-MGA).

Results of the PLS-SEM indicated that, firstly, POS had a positive and significant effect on continuance intention, attitude and job satisfaction. Moreover, the influence of job satisfaction on attitude was statistically significant. Paths from attitude and job satisfaction to continuance intention were statistically and positively significant. As a next step, PLS-MGA was conducted using basic bootstrapping to test the age difference in the research model. Significant differences were found in the paths from POS to attitude and from satisfaction to continuance intention. More specifically, the influence of POS on attitude was significantly stronger for the younger group. On the other hand, the impact of satisfaction on continuance intention was significantly stronger for the older group.

The large sample size of this study offered more persuasive empirical evidence on the role of POS in volunteers' perception and behavior. The findings suggest the importance of the event organizer's support for volunteer outcomes and clear communication with volunteers on their needs and wants.

This study examined the determinants of attendance at the Chilean national soccer tournaments between 1990 and 2002. A multilevel model approach was taken to estimate the effects of several factors, including unobserved sources, hypothesised to influence attendance in Chile. Results regarding team success, team division, population, stadium size and habitual persistence were found to influence professional soccer attendance; other factors such as admission price, age of team, international success, availability of soccer teams in the same vicinity and stadium ownership did not.

Depression has become a major health concern, particularly in developing countries. This disorder is highly prevalent among certain vulnerable populations, such as prisoners. In Peru, prisons are overcrowded, and the health of prisoners is neglected. Thus, this study aims to estimate the prevalence of depression diagnosed during incarceration in male inmates from all Peruvian prisons and assess its associated factors.

A cross-sectional study was conducted based on the secondary data analysis of the National Census of Prison Population 2016 in Peru. This study included records of prisoners who reported whether they were diagnosed with depression by a health-care professional after admission into the prisons. Descriptive, bivariate and multivariable analyses were performed.

Of the 63,312 prisoners included in this study, 1,007 reported an in-prison diagnosis of depression by a health-care professional, which represents a prevalence of 1.59%. Substance use disorder (adjusted prevalence ratio [aPR] 3.10; 95% confidence interval [CI]: 1.91–5.03), hypertension (aPR 7.20; 95% CI: 6.28–8.24) and previous discrimination (aPR 1.97; 95% CI: 1.62–2.40) were strongly associated with depression, even when adjusting for multiple confounders. Other directly associated variables were, for example, violence during childhood, infrequent visits in prison and diabetes.

The right of prisoners to adequate health care is being neglected in Peru. Mental health is a cornerstone of health quality. Acknowledging which factors are associated with depression in prison is important to implement strategies to improve the mental health of prisoners.

The purpose of this research paper was to investigate the use of methanolic extract of Salvia hispanica (S. hispanica) as a green corrosion inhibitor for bronze in a simulated acid rain solution.

Extract of S. hispanica was used as a green corrosion inhibitor for bronze in simulated acid rain solution. Electrochemical techniques such as potentiodynamic polarization curves, electrochemical impedance spectroscopy and electrochemical noise were used. Parameters such as polarization, charge transfer and noise resistance (Rp, Rct and Rn, respectively) were calculated.

Results showed that the extract acts as a good, anodic type of inhibitor. The inhibitor efficiency increased with increasing its concentration up to 400 ppm, decreasing beyond this concentration. Efficiency also increased with an increase in the immersion time. The inhibition was due to the adsorption of components found in the S. hispanica extract following a Langmuir adsorption isotherm.

S. hispanica extract can be used as a corrosion inhibitor for bronze in acid rain solution.

This study provides new information on the inhibition features of S. hispanica under specific conditions. This eco-friendly inhibitor could find applications to protect bronze exposed to polluted urban atmospheres.

This paper reviews the origins of the Ethics Council of the Federation of Social Communication Media of Chile (1991-2019) and looks into the historical circumstances surrounding its creation, the concept of self-regulation as understood by its founders, and the criteria that initially ruled its operation.

A qualitative survey of nine contemporary witnesses and the confrontation with the scientific literature.

The results reveal a significant coincidence with the academic literature both in the description of the concept of self-regulation and in the origin of the ethics councils and of the system under which they operate. However, a series of nuances not usually considered in the concept of self-regulation are described.

This study will help assess the national and international possibilities of self-regulation and the significance of the Chilean ethics council.

In recent international debates on auditing regulation, Spain has assumed a real prominence as a claimed practical example of where a policy of mandatory audit firm rotation did not work and was duly abolished. This study aims to provide an analysis of the implementation and subsequent removal of mandatory audit firm rotation in Spain in the 1990s.

This takes the form of historical analysis; the evidence in the paper derives from congressional hearings, financial newspapers and documents produced by the professional associations of auditors in Spain.

This paper demonstrates that at no stage was mandatory rotation of audit firms ever enforced on Spanish auditors. Further, the revision and subsequent removal of the Spanish law on mandatory audit firm rotation emerge as a rather politicized process, with no evident reference being made in the process of legislative reform to Spanish auditing experiences. The analysis also reveals that at the very time that Spain was being cited internationally for rejecting mandatory audit firm rotation, Spanish political parties and regulators were debating whether to “re‐introduce” such a regulation.

The clear implication of the paper is that considerable caution needs to be taken in today's international‐auditing arena, when analyzing the standpoints and claims made by professional associations and the evidence they provide to support their arguments for and against regulatory reform.

This paper aims to present a system that is fully capable of addressing the issue of detection, tracking and following pedestrians, which is a very challenging task, especially when it is considered for using in large outdoors infrastructures. Three modules, detection, tracking and following, are integrated and tested over long distances in semi-structured scenarios, where static or dynamic obstacles, including other pedestrians, can be found.

The detection is based on the probabilistic fusion of a laser scanner and a camera. The tracking module pairs observations with previously detected targets by using Kalman Filters and a Mahalanobis-distance. The following module allows to safely pursue the target by using a well-defined navigation scheme.

The system can track pedestrians from static position to 3.46 m/s (running). It handles occlusions, crossings or miss-detections, keeping track of the position even if the pedestrian is only detected in 55/per cent of the observations. Moreover, it autonomously selects and follows a target at a maximum speed of 1.46 m/s.

The main novelty of this study is the integration of the three algorithms in a fully operational system, tested in real outdoor scenarios. Furthermore, the addition of labelling to the detection algorithm allows using the full range of a single sensor while preserving the high performance of a combined detection. False-positives’ rate is reduced by handling the uncertainty level when pairing observations. The inclusion of pedestrian speed in the model speeds up and simplifies tracking process. Finally, the most suitable target is automatically selected by a scoring system.