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This study aims to assess the robustness and accuracy of the face-centred finite volume (FCFV) method for the simulation of compressible laminar flows in different regimes, using numerical benchmarks.

The work presents a detailed comparison with reference solutions published in the literature –when available– and numerical results computed using a commercial cell-centred finite volume software.

The FCFV scheme provides first-order accurate approximations of the viscous stress tensor and the heat flux, insensitively to cell distortion or stretching. The strategy demonstrates its efficiency in inviscid and viscous flows, for a wide range of Mach numbers, also in the incompressible limit. In purely inviscid flows, non-oscillatory approximations are obtained in the presence of shock waves. In the incompressible limit, accurate solutions are computed without pressure correction algorithms. The method shows its superior performance for viscous high Mach number flows, achieving physically admissible solutions without carbuncle effect and predictions of quantities of interest with errors below 5%.

The FCFV method accurately evaluates, for a wide range of compressible laminar flows, quantities of engineering interest, such as drag, lift and heat transfer coefficients, on unstructured meshes featuring distorted and highly stretched cells, with an aspect ratio up to ten thousand. The method is suitable to simulate industrial flows on complex geometries, relaxing the requirements on mesh quality introduced by existing finite volume solvers and alleviating the need for time-consuming manual procedures for mesh generation to be performed by specialised technicians.

Latin America has not been exempted from the effects of the COVID-19 pandemic. Hence, this study aims to identify the actions of 50 main multilatinas to face the pandemic.

A qualitative content analysis was conducted on newspapers published in Latin America and corporate websites from March 2020 to April 2020, during which the multilatinas took their first actions toward the pandemic.

Results identified 106 actions taken by multilatinas in social, operational, philanthropic and financial areas. This paper analyzes the results, discuss the implications for business theories and develops three theoretical propositions.

First, this study can serve as a reference for business decision-makers as it offers guidance in taking actions during a pandemic. Second, it highlights the importance of the speed of responses to unforeseen challenges. The study recommends that business managers include in their contingency plans procedures for addressing unforeseen situations, such as the pandemic, with a focus on increasing their response capacity.

The importance of this study lies in understanding multinational enterprises’ (MNEs) initial actions taken during unexpected disasters and rare events. This study fills two important gaps in the business literature that have not been addressed in the Latin American context, namely, the actions taken by MNEs facing a public health disaster and how MNEs cope with disastrous and rare events.

América Latina no ha estado exenta de los efectos de la pandemia de COVID-19. Por lo tanto, este estudio tiene por objetivo identificar las acciones de las 50 principales multilatinas para enfrentar la pandemia.

Una técnica cualitativa de análisis de contenido fue llevada a cabo en periódicos publicados en América Latina y páginas web corporativas entre marzo y abril de 2020, durante los cuáles las multilatinas tomaron sus primeras acciones hacia la pandemia.

Los resultados identificaron 106 acciones tomadas por las multilatinas en las áreas sociales, operacionales, filantrópicas y financieras. Además, se analizan los resultados, discuten las implicaciones para las teorías de negocios, y se desarrollan tres proposiciones teóricas.

Primero, este estudio puede servir como referente para los tomadores de decisiones ya que ofrece una guía de acciones tomadas durante la pandemia. Segundo, se muestra la importancia de la velocidad de respuesta a retos imprevistos. El estudio recomienda que los gerentes incluyan en sus planes de contingencia planes y procedimientos para abordar situaciones imprevistas, tales como la pandemia, enfocados en incrementar su capacidad de respuesta.

La importancia de este estudio recae en el entendimiento de las acciones tomadas por las empresas multinacionales durante desastres inesperados y eventos raros. Este estudio cubre dos huecos importantes en la literatura que no han sido abordados en el contexto de América Latina: las acciones tomadas por las multinacionales encarando un desastre de salud pública y como las multinacionales afronta los eventos raros y desastres.

A América Latina não está isenta dos efeitos da pandemia COVID-19. Portanto, este estudo tem como objetivo identificar as ações das 50 principais multilatinas para o enfrentamento da pandemia.

Uma análise qualitativa de conteúdo foi realizada em jornais publicados na América Latina e sites corporativos de março de 2020 a abril de 2020, período em que as multilatinas realizaram suas primeiras ações em relação à pandemia.

Os resultados identificaram 106 ações realizadas pelas multilatinas nas áreas social, operacional, filantrópica e financeira. Analisamos os resultados, discutimos as implicações para as teorias de negócios e desenvolvemos três proposições teóricas.

primeiro, este estudo pode servir como uma referência para os tomadores de decisão de negócios, pois oferece orientação na tomada de medidas durante uma pandemia. Em segundo lugar, destaca a importância da velocidade de resposta a desafios imprevistos. O estudo recomenda que os gestores de negócios incluam em seus planos de contingência procedimentos para enfrentar situações imprevistas, como a pandemia, com foco no aumento de sua capacidade de resposta.

La importancia de este estudio recae en el entendimiento de las acciones ocorres for las empresas multinacionais durante desastres inesperados y eventos raros. Este estudio cubre dos huecos importantes na literatura que não foi público no contexto da América Latina: las acciones por las multinacionales encarando um desastre de salud e como las multinacionales afronta los eventos raros y desastres.

The activities carried out in ports are disruptive to the environment where they are located. Therefore, the objective of this work is to analyze the presence of corporate social responsibility (CSR) in the missions and visions of the main ports of Latin America.

A qualitative technique of content analysis was applied to the missions and visions of 72 ports in Latin America. First, the missions and visions of the ports were collected (72). Second, it was assigned a value 1 if the mission had any evidence of CSR, 0 if it had no evidence and “-” if the mission was not found. The same procedure was performed with the visions.

Results indicate that 20.83% of the ports allude to CSR in their missions, 34.72% of the ports allude to it in their missions and visions and 13.88% only allude to it in their visions (22 ports did not mention it in their missions or their visions). So, the main findings indicate that in Latin America the majority of ports do not consider elements of CSR in their missions and visions.

This paper is mainly focused on covering two gaps in the literature: first, to increase knowledge about the strategic bases of ports in Latin America through their missions and visions; and second, to visualize the coherence of the missions and visions with the activities of CSR.

Corporate social responsibility (CSR) in Mexican companies is an incipient concept that, in recent years, has had greater participation in the planning of companies' organisational strategies. Similarly, Mexico, as an emerging economy, has managed to remain one of the main economies in Latin America and, together with companies and organised society, has developed public policies that allow compliance with the commitment of the 2030 Agenda and the achievement of its Sustainable Development Goals (SDGs). The objective of this work is to analyse the presence of CSR in Mexican companies and its relationship with the SDGs related to economic development, for which a content analysis of the websites of the hundred most important companies in Mexico, according to the 2019 ranking of Expansión magazine, was performed. Finally, we establish that more than half of Mexican companies do not consider aspects related to CSR in their organisational development, contributing to the increase in the percentage of the population lagging behind in education, health and quality food and resulting in an increase in the levels of poverty and extreme poverty among the population of Mexico.

The purpose of this paper is to design a synergetic controller to precisely and quickly track reference signals in robot manipulators. Having smooth control signal this controller enables the nonlinear robot system to track desired references in presence of disturbances in a finite time.

A new synergetic manifold is introduced here, followed by adding a nonlinear exponential term to it have a precise tracking within a finite time of the desired references with disturbances. Previously the nonlinear term was inserted in the main synergetic equation which makes it complicated due to its hard mathematical approach. Using Lyapunov function, the stability of the system in the presence of disturbances is proved. The validity of the resulted system is confirmed by simulating it in Simulink.

Using a terminal synergetic controller with new manifold proposed in this work enables system’s state variables to track desired reference signal in the presence of disturbances from any initial condition with proper precision and rate. Simulation results show that compared to similar methods it provides a more proper speed and a finite time convergence with high precision and speed.

Providing fast and precise convergence, the proposed controller can be used in robot manipulator systems which need fast response and also have a precise performance such as in printing 3D objects and any industrial process.

This chapter presents the historical process of the Urban Agriculture (UA) at Rosario, in search of a socio-productive model with a high component of social inclusivity. It considers the first glimpses in 1987 through the conformation of the first Urban Group Farm until the present day where UA has become a public policy. This process has created its own dynamics under the different organisational structures of the municipality, by successfully integrating the production, the circulation and the consumerism of healthy products through fairs and community-based organisations; also incorporating the different suburbs of the city. Agroecology is presented as the conceptual and methodological framework. The systematisation of this experience aims to make visible the course pursued by the UA in Rosario offering a description which allows to understand its processes and to obtain more specific details of the bases and principles of Agroecology. The main results that are highlighted from this process are (1) Consolidation of a municipal public policy of urban agriculture, which guarantees democratisation and access to means of production for agroecological food cultivation, its commercialisation and distribution in the different districts of the city; (2) Social transformation of neighbours who found in the horticultural identity a personal and collective life project, consolidated as reference in the city, the country and the region; (3) Presence of a critical citizenship that is identified as a protagonist, through different roles on sustainability of the Urban Agriculture Programme.

Commenting on the Mexican Revolution in 1938, Trotsky argued that the country might achieve “national independence,” understood as a break with dependency relations. Whether this might occur depended – Trotsky continued – on “international factors.” Though not engaging with Mexico, Antonio Gramsci made a similar theoretical point. It is hence from this perspective that this chapter analyses the Mexican Revolution, asking whether it led to a break in dependency relations and the attainment of “national independence” or what I refer to as “relative geopolitical autonomy.” Presenting a framework of analysis largely based on the work of Gramsci that highlights its continuity with the thought of Marx, the chapter will answer negatively to this question. The chapter starts from the idea that Porfirio Díaz’s regime was unable to adapt the economic structure (still pre-capitalist) to the complex superstructures (capitalist), that is, to realize an historic bloc. It would be this job that the emergent Mexican bourgeoisie sought to finish. However, the situation is complicated by the powerful emergence of social movements from below, constituted largely by landless peasants, and to a lesser extent, the industrial proletariat. I will therefore argue that the revolution has been both “passive” and “bounded.” The term passive revolution will be applied to the last phase of the revolution as the emerging bourgeoisie successfully coopted the demands of the popular masses thereby “passivizing” them. But crucially, the revolution was also “bounded” because international factors, and especially US influence, played a conditioning role throughout the revolutionary process. At the same time, it would be the very “passive” nature of the revolution that would contribute to the reproduction of relations of dependency. Hence the chapter concludes that the period Trotsky commented upon (the Cárdenas period) is the highest level of “independence” Mexico achieved, only to decrease again over the years.

This study illustrates the conceptual framework that expands the knowledge of the fundamental components that describe how AI-driven servant leadership (SEL) influences the job resources (JR), work engagement (WE) and job performance (JP) of tourism and hospitality employees.

The empirical study was conducted on a sample of 953 international tourism and hospitality employees who were selected via a purposive and snowball sampling approach in a cross-sectional survey. The analysis was performed using a partial least square-structural equation modeling.

The results of this study confirmed the positive impact of AI-driven SEL on employee JR with the boundary conditions of AI-driven SEL.

This study finding assists tourism and hospitality practitioners in understanding that in the near future, AI will have a major effect on the nature of work, including the impact on leadership styles. Hence, AI-driven SEL holds both positive (through direct impact on JR) and negative (via boundary conditions) impacts on employees’ JP and ultimately organizational success. Accordingly, managers should employ AI-driven SEL to increase employees’ JR, and once employees achieve high WE, they should constrict AI-driven SEL boundary conditions and their influence between JR and WE and WE and JP.

This study offers a novel and original conceptual model that advances AI-driven social theory, SEL theory and job demands-resources (JD-R) theory by synthesizing, applying and generalizing gained knowledge in a methodical way.