Integrated scheduling and inventory management of an oil products distribution system

The oil supply chain is facing new challenges due to emerging issues such as new alternative energy sources, oil sources scarcity, and price variability with high impact on demand and production and profit margins reduction. Additionally, the existence of large, complex and world wide spread businesses implies a complex system to be managed where distribution can be seen as one of the key areas that needs to be efficiently and effectively managed. Different types of distribution modes characterize the oil supply chain where the pipeline mode is one of the most complex to operate when having multiproduct characteristics. This paper addresses the planning of a generic oil derivatives transportation system characterized by a multiproduct pipeline that connects a single refinery to a storage tank farm. Two alternative mixed integer linear programming models (MILP) that aim to attain a set of planning objectives such as fulfilling costumers’ demands (which is mandatory) while minimizing the medium flow rate are developed. Additionally, final inventory levels are avoided to be excessively low. A real world scenario of a Portuguese company is used to validate and compare the two alternative MILP models developed in this paper.     

The Case Study of Los Angeles City & County Fraud,Embezzlement and Corruption Safeguards during times of pandemic

Public Organization Review - This exploratory qualitative case study analyzes the risks of misappropriation of COVID-19 relief funds managed by public agencies in the County of Los Angeles. This...     

The Impact of Childhood Sexual Abuse on Later Sexual Victimization among Runaway Youth

Path analysis was used to investigate the impact of childhood sexual abuse on later sexual victimization among 372 homeless and runaway youth in Seattle. Young people were interviewed directly on the streets and in shelters by outreach workers in youth service agencies. High rates of both childhood sexual abuse and street sexual victimization were reported, with females experiencing much greater rates compared with their male counterparts. Early sexual abuse in the home increased the likelihood of later sexual victimization on the streets indirectly by increasing the amount of time at risk, deviant peer affiliations, participating in deviant subsistence strategies, and engaging in survival sex. These findings suggest that exposure to dysfunctional and disorganized homes place youth on trajectories for early independence. Subsequently, street life and participation in high‐risk behaviors increases their probability of sexual victimization.     

Adult self-sufficiency and social adjustment in care leavers from children's homes: a long-term assessment

This paper presents a study carried out in Spain that followed up 260 young people, the majority of them adults, who had been in residential care for significant periods. The follow‐up takes place between 1 and 9 years after participants had left residential care, and assesses their level of social and work integration, as well as considering the incidence of problems related to marginalization and social exclusion. Furthermore, it analyses the reasons for the child being taken into care, the socio‐family context, length of stay, changes in placement and other features or incidents in relation to the residential care. The data show that close to 15% have serious problems (drug dependence, delinquency, etc.), 25% receive help from the social services and the rest manage independently to a greater or lesser extent. We discuss the significance of these data, especially the relationship between the final result and the initial and process variables.     

A Systematic Review of the Assessment of Quality of Life in Adolescents

This study examined how the quality of life (QoL) affects an individual’s disaster preparedness behavior (PB); furthermore, it also considered and examined the mediating effects of trust in government (GT) and the moderating effects of self-efficacy (SE). One way analysis of variance (ANOVA) was applied to test the differences in QoL, GT, SE, and PB, by socio-demographic, and the study hypotheses were verified by using hierarchical regression analysis based on 1682 samples. The Johnson–Neyman technique was used to test the conditional effects of SE on QoL and PB. All the hypotheses presented in this study were supported: (1) QoL had a positive effect on PB; (2) QoL had a positive effect on GT; (3) GT had a positive effect on PB; (4) GT mediated the relationship between QoL and PB; (5) SE moderated the relationship between QoL and PB. Specifically, when SE was high, the positive relationship between QoL and PB increased; (6) SE moderated the relationship between GT and PB. Specifically, when SE was high, the positive relationship between GT and PB increased; and (7) SE moderated the indirect effect of QoL on PB. Specifically, when SE was high, the mediating effect of GT on the relationship between QoL and PB increased. This study makes significant contributions in terms of identifying the mechanisms of QoL on PB based on the moderated mediation model. Improving individuals’ QoL is not only an important societal goal, but also an effective way to enhance people’s positive behavioral outcomes. Therefore, QoL improvement should be considered in the top-level design of government policies, and it should also be regarded as an important indicator of government performance assessment.

     

Trends in Inequality of Opportunity for Developing Countries: Does the Economic Indicator Matter?

Social Indicators Research - The aim of this paper is to shed some light on the behaviour of Inequality of Opportunity (IOp henceforth) in developing countries. The analysis is carried out using...     

Direct Management of COVID-19 at National and Subnational Level: The Case of the Western Amazon Countries

Public Organization Review - This paper analyses direct management of COVID-19 in Brazil, Colombia and Peru, the three largest countries in the Western Amazon region. Using information gathered...     

Robust estimation for linear regression with asymmetric errors

The authors propose a new class of robust estimators for the parameters of a regression model in which the distribution of the error terms belongs to a class of exponential families including the log‐gamma distribution. These estimates, which are a natural extension of the MM‐estimates for ordinary regression, may combine simultaneously high asymptotic efficiency and a high breakdown point. The authors prove the consistency and derive the asymptotic normal distribution of these estimates. A Monte Carlo study allows them to assess the efficiency and robustness of these estimates for finite samples.     

Self‐presentation in sociolinguistic interviews: Identities and language variation in Panambi, Brazil

This paper contributes to recent work examining the role of identity, and in particular the uses of language for self‐presentation and the expression of individual identity, through the analysis of two sociolinguistic interviews from a community of German origin in southern Brazil. Drawing from a quantitative study of variation in the southern state of Rio Grande do Sul, we conducted a detailed analysis of the interviews of two women of different ages and social backgrounds. We first describe the social, cultural and historical context of the interviews, and then discuss how our two speakers use their linguistic resources to express varied, and at times conflicting, aspects of their identities. More specifically, we show how our participants seem to maintain certain in‐group, German‐linked features, yet also use out‐group or Brazilian features in order to index both the (local) German and (regional) Brazilian aspects of their identities. Our data and analysis highlight how participants' identity and language use patterns can be better understood through close analysis of the content of their discourse.