Modelling and Simulation of the Primary Power Distribution of a Lunar Habitat

A MATLAB/Simulink model of the Primary Power Distribution System of a lunar habitat is presented. The model can be adapted to multiple scenarios, and is able to interface with computer models of other habitat subsystems. A constant supply of power is considered regardless of the source and the time of the day, regulating the bus voltage when required. The electrical system of the International Space Station is used for reference and validation. The model has been tested in two scenarios representing two locations on the surface of the Moon.Peer ReviewedPostprint (published version

Lunar ISRU Energy Storage and Electricity Generation

The survival of the astronauts and their equipment is the priority for any long-term exploration mission to the Moon. The provision of energy during the long lunar nights is a critical part of these missions. Several approaches have recently been considered to store and provide energy on the Moon by means of ISRU (In-Situ Resource Utilisation). We present a review of the energy requirements for a long mission scenario, and a trade-off analysis of the potentially suitable technologies for an ISRU-based system able to store heat and generate electricity. The most promising combinations of technologies are presented.Peer ReviewedPostprint (published version

Simulation of a full ISRU-based system for energy storage and electricity generation on the Moon

The survival of the crew and assets during the lunar night is one of the biggest challenges in the exploration of the Moon. The storage and supply of energy are key elements for the success of a mission. We present numerical simulations of a system based on ISRU that stores solar energy during the day and generates electricity during the night. We carried out analyses of each subsystem as well as simulations of the full system. Estimates of the performance of the system in terms of power output and mass of the system are presented.This work was financially supported by the European Space Agency (ESA) through contract 4000124000/18/NL/AF.Peer ReviewedPostprint (published version

Can Virtual Reality Become an Instrument in Favor of Territory Economy and Sustainability?

The study aims to identify how virtual reality technology can help protect and conserve flora and fauna in national parks and other environmental settings. To this end, the literature published in the Scopus database is examined. A Systematic Literature Review methodology from 2018 to 2022 and an Empirical Research (survey) applied to tourism in natural areas, mainly national parks, have been proposed. Virtual reality technology is particularly useful as a complement or alternative to visiting national parks. The main results indicate that, currently, daily life confronts us with stressful situations that can be mitigated through ecotourism, as well as virtual reality applications, such as games and videos, which interactively inform about the species of flora and fauna present in the park visited. This helps in the conservation and protection of endangered species, the conservation of the forest, as well as archaeological heritage sites present in these natural parks. The development and implementation of this technology varies from one context to another. It is beneficial for people with some kind of disability or for the physical effort involved in long walks, even on steep terrain, and sometimes it improves the conditions of access to the national park and the dangers related to such an exciting adventur

Modelling and Simulation of the Primary Power Distribution of a Lunar Habitat

A MATLAB/Simulink model of the Primary Power Distribution System of a lunar habitat is presented. The model can be adapted to multiple scenarios, and is able to interface with computer models of other habitat subsystems. A constant supply of power is considered regardless of the source and the time of the day, regulating the bus voltage when required. The electrical system of the International Space Station is used for reference and validation. The model has been tested in two scenarios representing two locations on the surface of the Moon.Peer Reviewe

Virtual Reality Technology: Analysis based on text and opinion mining

The purpose of this research is to highlight the importance of periodically analyzing the data obtained from the technological sources used by customers, such as user comments on social networks and videos, using qualitative data analysis software. This research analyzes user sentiments, words, and opinions about virtual reality (VR) videos on YouTube in order to explore user reactions to such videos, as well as to establish whether this technology contributes to the sustainability of natural environments. User generated data can provide important information for decision making about future policies of companies that produce video content. The results of our analysis of 12 videos revealed that users predominantly perceived these videos positively. This conclusion was supported by the findings of an opinion and text analysis, which identified positive reviews for videos and channels with many followers and large numbers of visits. The features such as the quality of the video and the accessibility of technology were appreciated by the viewers, whereas videos that are 100% VR and require special glasses to view them do not have as many visits. However, VR was seen to be a product which viewers were interested in and, according to Google, there are an increasing number of searches and sales of VR glasses in holiday seasons. Emotions of wonder and joy are more evident than emotions of anger or frustration, so positive feelings can be seen to be predominant

Lunar ISRU energy storage and electricity generation

Fifty years after the first human step on the Moon, many challenges for its exploration have yet to be overcome. Among them, the survival of the crew and/or lunar assets during the lunar night is mandatory for long duration missions. The environmental conditions of the lunar surface and its day-night cycle, with long periods of darkness, make the provision of energy a critical challenge. Several approaches have recently been considered to store and provide energy in the surface of the Moon by means of ISRU (In-Situ Resource Utilisation)Postprint (updated version

Systematic literature review and bibliometric analysis on virtual reality and education

The objective of this study is to identify and analyze the scientific literature with a bibliometric analysis to find the main topics, authors, sources, most cited articles, and countries in the literature on virtual reality in education. Another aim is to understand the conceptual, intellectual, and social structure of the literature on the subject and identify the knowledge base of the use of VR in education and whether it is commonly used and integrated into teaching–learning processes. To do this, articles indexed in the Main Collections of the Web of Science, Scopus and Lens were analyzed for the period 2010 to 2021. The research results are presented in two parts: the first is a quantitative analysis that provides an overview of virtual reality (VR) technology used in the educational field, with tables, graphs, and maps, highlighting the main performance indicators for the production of articles and their citation. The results obtained found a total of 718 articles of which the following were analyzed 273 published articles. The second stage consisted of an inductive type of analysis that found six major groups in the cited articles, which are instruction and learning using VR, VR learning environments, use of VR in different fields of knowledge, learning processes using VR applications or games, learning processes employing simulation, and topics published during the Covid-19 pandemic. Another important aspect to mention is that VR is used in many different areas of education, but until the beginning of the pandemic the use of this so-called “disruptive process” came mainly from students, Institutions were reluctant and slow to accept and include VR in the teaching–learning processes