Line Of Research Research Articles

Gran Canaria energy system: Integration of the chira-soria pumped hydroelectric power plant and analysis of weekly daily demand patterns for the year 2023

Due to its insular condition, Gran Canaria operates an isolated energy system that requires high self-sufficiency in energy generation and that covers its energy need, 3,327,872.76 MWh/year. The future integration of the Chira-Soria Pumped Hydroelectric Power Plant, scheduled for 2030, is expected to radically transform the energy dynamics of Gran Canaria's electricity system, facing different challenges and opportunities. Challenges include the need for greater flexibility due to growing renewable energy sources, going from 381,000 MW of renewables today to an increase of more than 750,000 MW, environmental commitments, and the operation must address potential operational constraints related to downstream hydrological effects. On the other hand, the opportunities lie in the ability of the reversible hydropower plant to provide balancing services during off-peak hours, improving the integration of intermittent energy sources such as wind and solar power, in addition, the Pumped Hydroelectric (PHES) technology is recognized as mature and efficient for large-scale energy storage, contributing significantly to the integration of renewable energy sources. Implementing innovative approaches such as integrating Big Data into construction projects can also improve efficiency and decision-making in the project delivery process. This facility will facilitate energy storage through the pumping of water at high levels, allowing it to be subsequently turbined in periods of high demand, which will be essential to improve the management and efficiency of the island's energy system. This energy demand will be studied, which follows certain patterns according to the day of the week and, continuing with the line of research established in previous works, a detailed analysis of the existing system, simulation and algorithmic optimization of the integration of the Chira-Soria Pumped Hydroelectric Power Plant into the energy system of Gran Canaria in the year 2023 will be carried out, providing the expected results of such optimal integration by differentiating the demand patterns of each day of the week, previously establishing these annual representative days.

Understanding national brand customer erosion: exploring socio-demographic and weight of purchase factors

Purpose The purpose of this study is to explore brand customer erosion at both the category and brand levels while considering consumer socio-demographic characteristics and weight of purchase factors. Design/methodology/approach Data from 3,563 buyers encompassing 20,601 purchases were collected from a prominent household data panel. Findings Brand customer erosion varies depending on socio-demographic factors (householder age, family size, life cycle and social class) and weight of purchase; variations are evident depending on the specific brand. Originality/value The paper makes a substantial contribution to the established fields of marketing and consumer behavior literature by opening a new line of research. It does so by demonstrating, the impact of socio-demographic factors on customer erosion. Simultaneously, it presents results that contradict the limited existing research on the influence of weight of purchase on brand customer erosion.

Work-family interface during COVID-19: a sociolinguistic study of working mums’ identity and mental health

BackgroundThe dramatic reconfigurations of work-family roles and social boundaries resulting from the social restrictions imposed during the Covid-19 pandemic led working mums to look for online sites as spaces of emotional support and regulation where they could vent their emotions, share their concerns and griefs, and seek advice. They also became interactional spaces where mums’ relevant identities were reassessed and enacted as they aimed to balance work-family roles and improve their wellbeing. The paper explores how working mums discursively negotiated their multiple identities in an online support forum during times of global struggle, how these identity constructions reflect the domains of Work-Family Conflict (WFC) and how working mums perceived these identities are related to their mental health.Methods127 posts of Chilean working mums published in a public online support forum for working mums collected during the first half of 2020 were analysed in three phases. The first one involved a thematic analysis to identify themes and subthemes related to working mums’ identity construction in the data. The second phase involved conducting a narrative analysis of working mums’ microstorias in order to identify a master narrative crafted by these working mums, and contesting and conforming ideologies of motherhood, among others. Finally, the third phase involved a fine-grained discourse analysis of the most representative extracts illustrating working mums’ identity negotiation.ResultsThe sociolinguistic analysis showed that working mums’ discourses displayed three themes of self-reflection, namely, diminishing self-care, reassessing their self, and enhancing self through self-care. Identity-related sub-themes for each main theme are discussed and discursively analysed. Two main points are emphasised: (1) the identity that was most salient in working mums’ discourse was their personal identity (rather than work-family roles and identities), and (2) microstorias allowed working mums to challenge the hegemonic power of dominant discourses around their identities and their work-family roles.ConclusionsThe study shows that a sociolinguistic approach to the exploration of working mums’ identity negotiation is useful to highlight the ways in which mums contest binary assumptions of work-family roles and the need to reconsider working mums’ life domains so that they reflect working mums’ actual identity needs and lived experiences. Future lines of research are outlined.

Unfinished nursing care occurrence, priority order and reasons as perceived by nursing students: An international study.

The study aimed to measure and compare differences (a) in the unfinished nursing care interventions overall and the order in which they are left unfinished; and (b) in the underline reasons, as perceived by Italian, Slovak and Turkish nursing students. In recent years, in the nursing education context a novel line of research in the field of unfinished nursing care as those interventions required by patients, but omitted or delayed, has emerged. However, no studies have been conducted at the international level. An international, comparative cross-sectional study was performed in 2022-2023 and reported here according to Strengthening the Reporting of Observational Studies in Epidemiology guidelines. A multinational research network was formed with a convenient sample of 13 universities and 60 campuses (4595 students). The Unfinished Nursing Care Survey for Students (UNCS4S) was administered. A total of 1850 students participated. According to the UNCS4S total score, Italians reported an average 50.9 out of 110 unfinished nursing care interventions (CI95 % 47.6-54.1), Slovakians 54.9 (CI95 % 53.7-56.1) and Turkish students 50.4 (CI95 % 49.2-51.5) (p<0.001). Some interventions were reported more often as unfinished across countries as supervising the task assigned to the nursing aides, going to the patient without being called, spending the required time with the patient and their caregivers and emotionally supporting patients and their caregivers. In terms of reasons, total scores were statistically different across countries (Italy: 45.92 out of 90, CI95 % 43.91-47.9; Slovakia: 62, CI95 % 61.02-62.98; Türkiye: 72.29, CI95 % 71.13-73.45; p<0.001); however, at the factor level, communication issues, lack of material resources and issues in supervision of nursing aides were reported in all countries as the most important reasons of the unfinished nursing care. Students learn to shape and set priorities early in their nursing careers with similar order in what to leave unfinished as first, despite the different educational structures, care cultures and healthcare systems. Among the unfinished nursing care reasons perceived, the most influential were similar across countries, suggesting common areas for improvement. How to better prepare students to be resilient and capable of managing the challenges posed by unfinished nursing care episodes due to the lack of resources and communications issues should be considered as a priority by nurse educators.

Explicit or implicit digital humanities? An examination of search strategies to retrieve digital humanities publications from large-scale scholarly databases

Abstract As a growing research field, digital humanities (DH) is receiving increasing attention from quantitative science studies using standardized scholarly databases. However, one of the challenges of this new line of research is how to select the query strategy to produce a representative sample of the field. In this research, we analyzed the differences between two publication samples acquired from the Dimensions database using two sampling approaches, namely, a keyword search and a DH journal list. We argue that these two samples offer distinct perspectives on the conceptual landscape of digital humanities, namely, implicit DH and explicit DH, and contribute to building a more comprehensive representation of the DH research domain. We identified notable differences between the publication samples from these two query strategies, especially the fact that these two samples have a very small overlap of publications, and they also have different disciplinary orientations. Our findings indicate that future quantitative studies analyzing DH publications should use more inclusive methods to cover both the implicit and explicit types of DH contributions. Moreover, we also discussed how our findings contribute to a deeper understanding of the disciplinary composition of DH, an interdisciplinary research field.

Arthropods to Eutherians: A Historical and Contemporary Comparison of Sparse Prenatal Microbial Communities Among Animalia Species.

Since the advent of next-generation sequencing, investigators worldwide have sought to discern whether a functional and biologically or clinically relevant prenatal microbiome exists. One line of research has led to the hypothesis that microbial DNA detected in utero/in ovo or prior to birth/hatching is a result of contamination and does not belong to viable and functional microbes. Many of these preliminary evaluations have been conducted in humans, mice, and nonhuman primates due to sample and specimen availability. However, a comprehensive review of the literature across animal species suggests organisms that maintain an obligate relationship with microbes may act as better models for interrogating the selective pressures placed on vertical microbial transfer over traditional laboratory species. To date, studies in humans and viviparous laboratory species have failed to illustrate the clear presence and transfer of functional microbes in utero. Until a ground truth regarding the status and relevance of prenatal microbes can be ascertained, it is salient to conduct parallel investigations into the prevalence of a functional prenatal microbiome across the developmental lifespan of multiple organisms in the kingdom Animalia. This comprehensive understanding is necessary not only to determine the role of vertically transmitted microbes and their products in early human health but also to understand their full One Health impact. This review is among the first to compile such comprehensive primary conclusions from the original investigator's conclusions, and hence collectively illustrates that prenatal microbial transfer is supported by experimental evidence arising from over a long and rigorous scientific history encompassing a breadth of species from kingdom Animalia.

Improving Knowledge Retention and Perceived Control Through Serious Games: A Study About Assisted Emergency Evacuation.

Digital games for education and training, also called serious games (SGs), have shown beneficial effects on learning in several studies. In addition, some studies are suggesting that SGs could improve user's perceived control, which affects the likelihood that the learned content will be applied in the real world. However, most SG studies tend to focus on immediate effects, providing no indication on knowledge and perceived control over time, especially in contrast with nongame approaches. Moreover, SG research on perceived control has focused mainly on self-efficacy, disregarding the complementary construct of locus of control (LOC). This article advances both lines of research, assessing user's knowledge and LOC over time, with a SG as well as traditional printed materials that teach the same content. Results show that the SG was more effective than printed materials for knowledge retention over time, and a better retention outcome was found also for LOC. An additional contribution of the paper is the proposal of a novel SG that targets the inclusivity goal of safe evacuation for all, extending SG research to a domain not dealt with before, i.e., assisting persons with disabilities in emergencies.

Modeling impaired insight after drug use in rodents.

Impaired insight in substance use disorder has been argued to reflect a global deficit in using cognitive models to mentally simulate possible future outcomes. The process of mentally simulating outcomes allows us to understand our beliefs about their causes, that is, to have insight and thereby avoid potentially negative outcomes. However, work in humans cannot address whether impaired insight and its neural/neurochemical sequalae are present prior to the development of a substance use disorder, a consequence of substance use, or a combination of both. This is because baseline measurements prior to drug use are not possible in humans. However, if these changes can be directly caused by drug use, then in animal models, a history of drug use should cause impairments in behavioral tasks designed to assess such inferences. Focusing on cocaine use, here we will review several lines of research from our laboratory that have tested this question using learning-theory tasks designed to isolate insight. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

How not to describe a species: lessons from a tangle of anacondas (Boidae: Eunectes Wagler, 1830)

Abstract A recent revision of the anacondas (Serpentes: Boidae: Eunectes), with the description of a new species of green anaconda, generated extensive publicity, but also provoked considerable controversy due to inadequacies of the evidence used and errors in nomenclature. We here use the case of this problematic publication to: (i) highlight common issues affecting species delimitations, especially an over-reliance on mitochondrial DNA data, and reiterate best practices; (ii) reanalyse the data available for anacondas to establish the true current state of knowledge and to highlight lines of further research; and (iii) analyse the nomenclatural history and status of the genus. While our analysis reveals significant morphological variation in both green and yellow anacondas, denser sampling and an analysis of informative nuclear markers are required for meaningful species delimitation in Eunectes. Tracing the history of name-bearing types establishes Trinidad as the type locality for Boa murina Linnaeus, 1758 and allows identification of the extant lectotype for the species. Finally, we emphasize the responsibility of both journals and authors to ensure that published taxonomic work meets the burden of evidence required to substantiate new species descriptions and that species are named in compliance with the rules of zoological nomenclature.

Using Satellite Data Assimilation Techniques to Combine Infrasound Observations and a Full Ray-Tracing Model to Constrain Stratospheric Variables

Abstract Infrasound waves generated at Earth’s surface can reach high altitudes before returning to the surface to be recorded by microbarometer array stations. These waves carry information about the propagation medium, in particular temperature and winds in the atmosphere. It is only recently that studies on the assimilation of such data into atmospheric models have been published. Intending to advance this line of research, we here use the modulated ensemble transform Kalman filter (METKF)—commonly used in satellite data assimilation—to assimilate infrasound-related observations in order to update a column of three vertically varying variables: temperature and horizontal wind speeds. This includes stratospheric and mesospheric heights, which are otherwise poorly observed. The numerical experiments on synthetic data but with realistic reanalysis product atmospheric specifications (following the observing system simulation experiment paradigm) reveal that a large ensemble is capable of reducing errors, especially for wind speeds in stratospheric heights close to 30–60 km. While using a small ensemble leads to incorrect analysis increments and large estimation errors, the METKF ameliorates this problem and even achieves error reduction from the prior to the posterior mean estimator. Significance Statement The stratosphere and mesosphere have significantly less observational coverage compared to the troposphere, especially for the winds. This lack of information can reduce the accuracy of medium-range weather forecasts. By mimicking a realistic setup, this study paves the way for including novel observations in the estimation of the atmospheric state in these heights using an ensemble data assimilation method. These observations come from a dataset of opportunity containing infrasound-related measurements that are routinely carried out at several stations around the world.

High-power performance studies of an S-band high-gradient accelerating cavity for medical applications

High-Gradient accelerating cavities are one of the main research lines in the development of compact linear accelerators. However, the operation of such accelerating cavities is currently limited by non-linear electromagnetic effects that are intensified at high electric fields, such as RF breakdowns, dark currents and radiation. A novel normal-conducting High Gradient S-band Backward Travelling Wave accelerating cavity for medical application (v = 0.38c) has been designed and constructed at CERN with a design gradient of 50 MV/m. In this paper, the high-power performance studies of this novel design carried out at the IFIC high-power laboratory are presented, as well as the analysis of the conditioning parameters in combination with numerical simulations.

Management of Fallot's Uncorrected Tetralogy in Adulthood: A Narrative Review.

The majority of cyanotic congenital cardiac defects are caused by the tetralogy of Fallot. Some symptoms include a biventricular connection of the aortic root, right ventricular hypertrophy, blockage of the right ventricular outflow tract, and a ventricular septal defect. Our understanding of tetralogy of Fallot (TOF) has significantly advanced since it was first described in 1888, and early diagnosis has led to improved surgical management and increased life expectancy. Adults with unrepaired and repaired TOF present with a range of late complications, including heart failure, the need for re-interventions, and late arrhythmias. Right ventricular (RV) failure, often caused by chronic pulmonary regurgitation, is a significant cause of heart failure in patients with TOF. Current treatment options are limited, and mainstay surgical procedures such as pulmonary-valve replacement (PVR), trans-annular repair (TAR), or infundibular widening repair have not shown a significant reduction in preventing right ventricular (RV) failure or death. Here, we explain the mechanisms of RV failure in ToF, chronic pulmonary regurgitation, heart failure, and secondary polycythemia. HF management in untreated adults is discussed. The progression of the disease, as well as complications, are also discussed. The treatment plan and the need to investigate the best management approach for this unsolved problem are included. This review aims to fill the knowledge gaps and supply valuable information regarding mechanisms of RV failure, chronic pulmonary regurgitation, and secondary polycythemia. To summarize, a new combat strategy must be found to battle RVF, and a more profound vision of these mechanisms is required. If it is not corrected, it will be one of the future research lines that will contribute to designing more efficacious treatment techniques for adults with TOF.

ROMANIAN STUDENTS’ KNOWLEDGE, ATTITUDES AND BEHAVIORS REGARDING SUSTAINABILITY. TESTING AN ASSESSMENT INSTRUMENT

Universities’ role in promoting sustainability and the sustainable development goals (SDGs) is increasingly highlighted in the recent years. The high number of academic papers published in this field stands as proof of the attention received by these subjects. The integration of sustainability in education implies the transmission of principles, values and practices in teaching-learning activities, research and in institutional operations. While studies focus on the type of educational and extracurricular actions that universities may promote in order to develop more sustainability aware students, less attention is devoted to the actual impact of these practices. The Education for Sustainable Development (ESD) approach starts with the assessment of the current state: what is being done in universities and what is the level of sustainability awareness among the main actors, mainly students. Having a concrete picture regarding the students' level of sustainability literacy, we can identify opportunities to develop new implementation practices that address the sustainability issue within higher education. Currently, there is no consensus over a tool to evaluate the knowledge, attitudes as well as behaviors of students regarding sustainability and the SDGs. Nevertheless, efforts were made in this line of research. Our study focuses on the methodologies to assess these aspects. Based on previously used tools, we developed and tested a questionnaire on Romanian student population. The tested scales for sustainability knowledge, attitudes and behaviors highlight the different pillars of sustainable development, namely: social, economic and environmental, revealing that more focus is given to the latter.

Getting value out of working memory through strategic prioritisation: Implications for storage and control.

Working memory is an active system responsible for the temporary maintenance and processing of information in the support of cognition and action. In keeping with this, a growing body of research has explored the close links between working memory and attention, and how these might be harnessed to impact performance and possibly improve working memory efficiency. This is theoretically and practically important, given that working memory is a central hub in complex cognition yet is extremely capacity- and resource-limited. We review work carried out over the last 10 years or so looking at how high "value" items in working memory can be strategically prioritised through selective attention, drawing principally from visual working memory paradigms with young adult participants, while also discussing how the core effects extend to different task domains and populations. A consistent set of core findings emerges, with improved memory for items that are allocated higher value but no change in overall task performance, and a recency advantage regardless of point allocation when items are encountered sequentially. Value-directed prioritisation is effortful, under top-down strategic control, and appears to vary with perceptual distraction and executive load. It is driven by processes operating during encoding, maintenance, and retrieval, though the extent to which these are influenced by different features of the task context remains to be mapped out. We discuss implications for working memory, attention, and strategic control, and note some possible future directions of travel for this promising line of research.

What Formal Approaches to Syntactic Interfaces Can Tell Us about the Syntax of Preverbal and Prenominal Constituents in Galician

An important line of research within a generative, formal approach to syntax in the early 21st century has centered on exploring phenomena related to the interface between syntax and other linguistic modules in human language. In this paper, we review the notion of interfaces and how they have been viewed within formal theoretical approaches to monolingual and bilignual competence and language acquistion, noting their relevance as they relate to language acquisition and bilingualism in the context of Galicia (Spain). We review a selection of Noun Phrase (NP) structures that implicate a syntactic interface: subject position, clitic directionality, and determiner clitic allomorphy. We provide a review of the relevant literature and the theoretical issues of interest as they relate to our understanding of these syntactic interfaces, reporting on our current theoretical understandings, persistent questions, and our view of the path forward as it relates to linguistic research on the Galician language.

Untangling the threads of motivated memory: Independent influences of reward and emotion.

Motivational and emotional influences on memory have been studied extensively; however, despite the link between these constructs, they have been studied in separate lines of research, with very little work examining their effects concurrently. The current study takes a novel approach to manipulate motivational and emotional influences orthogonally, and within the same task, to test their interplay on intentional memory formation. If emotion and reward motivation are tightly linked, they may rely on overlapping cognitive mechanisms, thus we would not expect emotion and reward to interact in memory. Alternatively, they could be distinct constructs and therefore would boost memory when both are included in the same experimental trial, above and beyond additive effects. To test these competing predictions, in Experiment 1, participants (n = 180) completed an old/new recognition memory task with emotional (negative, positive) and neutral words intentionally encoded with high or low reward anticipation cues. In Experiment 2, participants (n = 159) encoded emotional and neutral words with a high or low reward cue, but memory was tested with free recall using study-test blocks. The findings from both experiments converged. There were main effects of emotion and reward in generally hypothesized directions, but no evidence of an interaction between these factors. This is in line with the prediction that emotion and reward motivation are similar constructs. Their combination within a trial does not boost memory above and beyond either of these factors alone perhaps indicating these constructs have similar cognitive mechanisms.

Trajectories of socio-ecological systems: Does social capital matter? A case study in the tropical Andes

Between natural and social systems there are two-way interactions, which determine the path of change in the Socio-Ecological System. For example, the type of land use decisions that society makes could lead to the deterioration of the biophysical system and its ecological functioning, causing effects on social well-being. Conceptual and simulation models of socio-ecological systems allow an understanding of such interactions and the development of trajectories. In this manuscript we explore the link between three lines of research that overlap but have been studied separately (i) Governance, (ii) Socio-ecological systems, and (iii) social capital. This paper analyzes the dynamics of social capital and its influence on governance and Land Use and Land Cover Changes in a basin of the Colombian Andes. To this end, we develop a Systems Dynamics model (SD). This research contributes to the (i) understanding of how the institutions, their policies, the actors, and the interactions generated between them in a territory influence the management of natural resources, which is indispensable to supporting the decision-making process; and (ii) operationalization of the social capital elements on the SES model through an integrated analysis with consideration of feedback mechanisms between natural and social system. With this model, a scenario evaluation is developed to analyze the effect of different approaches of the social capital organization on land cover in the basin case study.

Advancements in mobile antenna design: A comprehensive literature review

This study reviews the literature on antenna design in mobile applications, analyzing research, theses, and academic papers to summarize current developments, identify gaps, and suggest future research lines. The review aims to compile the most recent findings on mobile antenna design from respected English-language journals. The study analyzes forty articles discussing both advanced and traditional antenna designs, focusing on efficiency, noise reduction, SAR compliance, size restrictions, polarization, and gain. It emphasizes the importance of innovation and multidisciplinary methods to meet the changing needs of the global communication network. The review uses keywords such as "Antenna," "Antenna Design," "Mobile Antenna," and "Mobile Antenna Design" to find relevant studies across IEEE Xplore, Scopus, Web of Science, and Google Scholar.

People's Intentions to Use Metaverse Technology: Investigating the Role of Gratifications and Perceptions

Abstract The aim of the Metaverse is to become a major achievement in the realm of cyberspace, envisioning a significant advancement toward a more immersive and interactive internet experience. Given the potential impact of this new development, a thorough understanding of people's intentions to use this technology is warranted. Drawing on the theoretical tenets of Uses and Gratification theory and I-P-R framework, a research model was developed that incorporates three types of gratification (hedonic, utilitarian, and social) and three psychological perceptions (immersion, telepresence, and realism) that are related to people's behavioral intentions. Structural equation modeling was used as an analytical strategy based on a representative sample of 617 respondents. Results showed that all three gratifications and perceptions were positively associated with people's intentions to use Metaverse technology. In conclusion, this model offers a relevant starting point toward establishing a timely research line on users' perceptions and engagements with Metaverse technology.

Understanding the Effect of Listening to Music, Playing Music, and Singing on Brain Function: A Scoping Review of fNIRS Studies.

Music is integrated into daily life when listening to it, playing it, and singing, uniquely modulating brain activity. Functional near-infrared spectroscopy (fNIRS), celebrated for its ecological validity, has been used to elucidate this music-brain interaction. This scoping review synthesizes 22 empirical studies using fNIRS to explore the intricate relationship between music and brain function. This synthesis of existing evidence reveals that diverse musical activities, such as listening to music, singing, and playing instruments, evoke unique brain responses influenced by individual traits and musical attributes. A further analysis identifies five key themes, including the effect of passive and active music experiences on relevant human brain areas, lateralization in music perception, individual variations in neural responses, neural synchronization in musical performance, and new insights fNIRS has revealed in these lines of research. While this review highlights the limited focus on specific brain regions and the lack of comparative analyses between musicians and non-musicians, it emphasizes the need for future research to investigate the complex interplay between music and the human brain.