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The electricity production from Renewable Energy (RE) in isolated locations requires long-term energy storage systems. To that end, Hybrid Energy Storage Systems (HESS), through a combination of hydrogen and batteries, can benefit from the different advantages of both technologies. This paper presents a hybrid Power-to-Power (PtP) Optimal Power Dispatch (OPD) model for isolated systems with no electric grid access. Currently, the electricity supply in such cases is usually based on a mix of RE as the primary energy source sustained by a diesel genset acting as a backup generator. In this context, the model delivers the hourly energy flows between renewable production sources, energy storage devices and the electrical load, which minimises costs and Green House Gases (GHG) emissions. For validation purposes, the model was tested through its application to a case study in an isolated area in the Canary Islands, Spain. The results show that the algorithm calculates the hourly OPD successfully for a given plant sizing, considering the defined operational states of the different assets. These operational constraints showed a decrease in the PtP round-trip efficiency of 5.4% and a reduction of the hydrogen production of 9.7%. Finally, the techno-economic analysis of the results proves that the combination of hydrogen and batteries with RE production is a feasible alternative to phasing out fossil fuels for the selected case study – reducing the diesel generator usage down to 1.2% of the yearly energy supply. • Novel multi-state optimal power dispatch model for power-to-power energy systems. • Multi-year techno-economic evaluation of an off-grid case study. • Phasing out fossil fuels with renewable energy-based hybrid energy storage systems. • Hydrogen technology contributes to a lower levelized cost of energy. • High initial investment cost was a significant entry barrier to deploying hydrogen. [ABSTRACT FROM AUTHOR]

This paper examines the features and practices of military command during a war of conquest, as exhibited by Castilian captains at the dawn of Iberian Atlantic expansion between the Late Middle Ages and the Early Modern Age. Focusing on Castilian royal chronicles of military campaigns against the aboriginal people of the Canary Islands, such texts demonstrate continuities with the military discourse developed during the war against the Muslims in medieval Spain, as well as adaptation to a new geographical, social and cultural context, embodied in the experiences of the conquest of the Americas. [ABSTRACT FROM AUTHOR]

Occupational stress, as a negative facet, is a pervasive problem with significant implications for organizations, employees, welfare systems and health. The implementation of measurement tools that can capture the different organizational dimensions that determine stress in workers is part of the stress management and troubleshooting strategy that every company must manage daily. The aim of the present study was to adapt and validate the 25-item version of the ILO-WHO stress scale by Ivancevich and Matteson in the context of the Canary Islands of Spain. The tool assesses specific organizational dimensions of work-related stress determinants: organizational climate and structure, leader influence, cohesion, territory, technology and group support. An exploratory factor analysis (EFA) on a sample of 1510 Canary Islands workers was carried out. The results indicate that the job stress scale revealed adequate psychometric properties, construct validity and internal consistency (Cronbach's alpha = 0.972), and it can be profitably used to measure stress. At the end of the paper, theoretical and practical implications are discussed. [ABSTRACT FROM AUTHOR]

The location, size, and structure of the farmlands and hydraulic systems built by the Indigenous inhabitants of Gran Canaria, Canary Islands, Spain, remain unknown. This hampers our ability to understand how they organized agricultural production and how European settlers transformed local landscapes to build commercial plantations in the late fifteenth century. This paper combines an analysis of archival sources with the study of agricultural landscapes and practices to identify and describe the fields that were employed by the first colonists of Agüimes and Temisas, and to derive information about the location, design, and management of the pre-Hispanic farmlands. [ABSTRACT FROM AUTHOR]

This paper analyzes different forms of violence identified among the ancient Canarians, a population that settled an oceanic island and remained there, without regular external contacts, for more than a millennium. Specifically, we focus on a funerary deposit composed of 14 individuals with high rates of violence, in some cases of a lethal nature. The study uses forensic anthropology techniques to characterize the individuals' injuries. It also explores the chrono-cultural framework in which they were inserted for an historical explanation. The high frequency of individuals with evidence of violence, the features of traumatic injuries, and the radiocarbon data suggest an event of extreme physical violence. This episode appears to be linked to socioeconomic changes, including population growth, marked social differences, rivalry between groups, and competition for control of the resources in a small and diverse territory. The different patterns of violence identified among the skeletal remains in Gran Canaria serve to explore the nature of human relations over a prolonged period in an insular context. [ABSTRACT FROM AUTHOR]

This article contributes to the innovative literature on human mobility, highlighting the sense of place linked to transient mobility among people who live on an island. Drawing on 40 in-depth interviews with Romanians living in the Canary Islands, this paper introduces the concept of a 'floating sense of place' and advances understandings on how people of different generations use their experiences of mobility in time and space to construct and interpret their sense of place on the move. How is floating sense of place created and how does mobility affect the sense of belonging of people who live transiently on an island? I highlight that the socio-economic circumstances of mobile people together with the particular conditions of the island – especially the presence of the ocean – create corporeal and sensorial predispositions that contribute to the creation of the 'floating sense of place'. I argue that mobility articulates multiple practices and imaginaries that connect people with the ocean – as both a real and symbolic element. In turn, this helps them bond with various places in their transitory movement, and influences the construction of a floating sense of place: a) living in a floating 'paradise' and moving for work or business; b) in-between floating; and c) on-the-move floating: between drift and search of place and future aspirations. [ABSTRACT FROM AUTHOR]