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This paper aims to detail the reactive flow simulations of a LOX/CH4 multi-element rocket engine. The work has been conducted within the framework of the HYPROB-BREAD project whose main objective is the design, manufacture and testing of a LOX/LCH4 regeneratively cooled ground demonstrator.

Numerical simulations have been carried out with both commercial software and CIRA software developed in house. Two sets of boundary conditions, nominal and experimental, have been applied from which a code-to-code validation has been effected with the former and a code-to-experiment validation with the latter.

The results presented include both flow data and heat fluxes as well as parameters associated with engine performance, and indicate an excellent agreement with experimental data of a LOX/CH4 multi-element rocket engine.

The research is unique as the CIRA code Numerical Experimental Tool (NExT) has been validated with the commercial software FLUENT as well as with experimental values from the firing of the LOX/CH4 rocket engine demonstrator.

The present study evaluates the principal forms of socioenvironmental damage suffered by local traditional populations and indigenous communities as a result of the installation and operation of the Pecém Industrial and Shipping Complex. The main problem being pollution in the municipalities of São Gonçalo do Amarante and Caucaia, which is in the Brazilian state of Ceará. As a theoretical framework, we use the concept of “environmental justice,” and “environmental racism.” The latter were used to understand the process of “deterritorialization” of these communities that resulted in extensive impacts on the natural environment, as well as the way of life and productive practices of these communities. Our analyses confirm the destruction of the means that allow noncapitalist exploitation of natural resources, such as artisanal fisheries, subsistence farming, and the use of commons. We show how all these processes are constitutive of environmental injustice and environmental racism. These may contribute to the organization of the resistance and struggle of the affected populations, namely indigenous peoples and traditional communities.

The purpose of this study is to validate the psychometric properties of the Self-Perceived Employability Scale in the context of the United Arab Emirates (UAE-SPE) and to verify the model fit of the UAE-SPE and University Commitment Scale (UC) (Rothwell et al., 2008) for undergraduate students.

A cross-sectional survey study was carried out to collect the data using a web-based survey tool (Qualtrics) at a public university in the UAE. The sample was 646 undergraduate students.

As a result of the factor analysis, the study validated three factors of SPE for undergraduate students in the UAE that explain their perceptions of their university reputation, their field of study, the state of the UAE labour market and confidence in their skills. Confirmatory factor analysis verified good model fit indices of UAE-SPE and the UC scale. In addition, the study found a statistically significant positive relationship between the UC scale and the three factors of UAE-SPE.

Currently, there is a scarcity of published research on self-perceived employability amongst undergraduate students in higher education institutions in the UAE and the Arab region. This article not only contributes to research on this topic but also validates two scales, allowing cross-cultural comparisons of SPE and UC of undergraduate students in the Arab region and worldwide.