Extraction, characterization and properties evaluation of pineapple leaf fibers from Azores pineapple.

Pineapple leaves can provide competitive and high-quality fibers for textile purposes. Despite pineapple being cultivated in the Portugues islands there is still a technology gap for the extraction and treatment of Pineapple Leaf Fibers (PALF) in Europe. Since Azorean Pineapple differs significantly from other plants in the bromeliad family, the properties and characterization of its leaf fibers were explored for the first time. Long fibers have been extracted by hand scraping and compared to biological retting at 25 °C for different time periods. It was explored the properties of PALF from plants of different ages (11- and 18-months) and from different zones of the leaves (beginning, middle, and tip). Physical-mechanical properties of Azores PALF were determined, including diameter, linear density, strength, Young's modulus, and elongation at break and characterized by ATR-FTIR, XRD, TGA/DTG, and FESEM to understand their chemical and morphological characteristics. While slight differences were observed between different ages, variations in physical-mechanical properties were notable among fibers extracted from different leaf positions. Extraction of Azores PALF through 25 °C biological retting for 14 days effectively eliminated non-fibrous matter and produced the thinnest and strongest fibers. These fibers ranged between 34.9 and 168.3 µm in diameter, 1.39 and 7.07 tex in linear mass density, 37-993 MPa in tensile strength, 1.0-3.9 % in elongation at break, and 2.4-21.8 GPa in Young's modulus.

Responding to everyday problems and crises: Measuring community resilience.

Resilience is of the upmost importance to deal with everyday problems faced by communities. The concept of community resilience is gaining prominence in disaster management policy and practice, and it has been shown to be an important factor during pandemic recovery such as during the SARS-CoV-2 outbreak. We present an instrument for community resilience assessment adapted for disasters like the pandemics. The instrument was based on the theory-based and evidence-informed Communities Advancing Resilience Toolkit (CART) Assessment Survey, adapted for the first time to Portuguese. Another strong feature of this study relates to the targeted participants, namely human service workers (598). They are key informants for their close involvement with communities. This version of the CART was reliable. A confirmatory factor analysis indicated a good relationship between the observed variables and their underlying latent constructs. Moreover, tests for measurement invariance across participants showed that differences in factor variances and covariances were not attributable to age-based differences in the properties of the scales themselves. Our findings support the fundamental idea that it is worthwhile to have an instrument to measure community resilience. Thus, our study adds to the evaluation of the CART, supporting its value as a robust instrument to measure resilience at the community level in different countries.

Smartphone Use Side-by-Side with Burnout: Mediation of Work-Family Interaction and Loneliness.

The main objective of this investigation is to study the relationship between compulsive smartphone use and burnout, and the potential mediating effect of negative work−family interaction and loneliness in this relationship. An online questionnaire was applied to a sample of 228 Portuguese workers, from various sectors, aged between 19 and 60 years (mean = 32.32); (standard deviation = 9.25), mostly female (64.5%; n = 154). The data were analyzed through descriptive and inferential statistics. The main results show that the compulsive use of the smartphone is positively and expressively related (ß = 0.258; p < 0.001) to burnout, with compulsive users reporting more symptoms of burnout. In addition, this study shows the mediating power of negative work−family interaction and loneliness, in the relationship between compulsive smartphone use and burnout, with this effect being positive and significant (B = 0.072; 95% CI [0.026; 0.145]; B = 0.068; 95% CI [0.008; 0.141]). These results highlight the need for individuals and organizations to use smartphones with caution, as well as reinforce that companies must develop a way to prevent and treat possible risk factors associated with this phenomenon.

AI and Blockchain as New Triggers in the Education Arena.

Several scholars have examined the potential use of AI and Blockchain in education, primarily focusing on the contributions of such technologies with a goal to improve learning possibilities and outcomes for students [...].

Positive Psychological Capital as a Predictor of Satisfaction With the Fly-In Fly-Out Model.

The flexibility of markets and international agreements have lured a growing number of companies to expand their business beyond frontiers in search for new markets and a bigger business network. Specifically, expatriates became keystones to implant and promote the so desired expansion into international markets, Particularly, Fly-in fly-out (FIFO) flexpatriates. Although FIFO work practices are widely used, little is known about how to promote these professionals' perceived job satisfaction (JS) across the course of their work cycles. That is why the goal of our research is to test the positive psychological capital (PsyCap) applicability to Portuguese FIFO flexpatriates. In the midst of the positive psychology theories, Luthans et al. (2007b) underline that workers are the psychological capital of any organization. Therefore, the development of the PsyCap becomes crucial and also contributes to the promotion of JS, nowadays a construct intertwined with well-being. As such, we developed and applied a HERO-(hope, self-efficacy, resilience, and optimism)-micro-intervention in order to assess whether it moderated the relationship between a FIFO flexpatriates PsyCap and their JS. The research took place over three distinct moments, both PsyCap and JS were measured before and after the HERO micro-intervention, and again 3 months later. The data collected shows that a positive correlation exists between FIFO flexpatriates PsyCap and JS. Moreover, our results pointed out that the micro-intervention enhanced FIFO flexpatriates PsyCap, and also showed that this increase lasted over (at least) 3 months.

Organizational and Job Resources on Employees' Job Insecurity During the First Wave of COVID-19: The Mediating Effect of Work Engagement.

The world of work has been severely affected by the COVID-19 pandemic due to the high instability observed in the labor market, bringing several new challenges for leaders and employees. The present study aims to analyze the role of organizational and job resources in predicting employees' job insecurity during the first wave of the COVID-19 outbreak, through the mediating role of work engagement. A sample of 207 Portuguese employees participated (Mean age = 45 years old, SD = 9.92), of which 64.7% were women. Data was collected using an online survey, including self-report measures of organizational resources (perceived organizational support), job resources (performance feedback and job autonomy), job insecurity, and work engagement. Data showed that job and organizational resources negatively influenced job insecurity. Moreover, work engagement was a significant mediator of the relation between performance feedback (facet of job resources) and job insecurity. Findings suggest that investing in job and organizational resources can act as protective factors to minimize feelings of job insecurity. Likewise, leaders should foster work engagement among employees to help them balance the relation between these resources and job insecurity, especially in crisis situations. Overall, this study takes a new, underexplored perspective, theoretically bridging organizational and job resources with job insecurity and work engagement during a time of great uncertainty, such as the COVID-19 pandemic.

Assessing quality of life of self-reported rheumatic patients.

The aims of this study were to assess the health-related quality of life (HRQoL) in patients with self-reported rheumatic diseases (RD), to classify self-reported rheumatic patients in groups according to their health state and to explore the associations between health status and sociodemographic variables. Data came from the Portuguese Epidemiologic study of the RD. A sample of the Portuguese population aged 18 or more (n = 10,661) stratified by region and locality dimension was interviewed by trained interviewers and answered a standardized questionnaire that included the SF-36v1, the EQ-5D-3L, medical history, identification of potential rheumatic diseases, sociodemographic characteristics, among others. Descriptive statistics and parametric tests were used to compare HRQoL of respondents with and without RD. Comparisons with normative data from the Portuguese population were also carried out. A cluster analysis was used to classify respondents into homogeneous groups. Regression analyses were used to identify factors associated with HRQoL. Respondents with self-reported RD assigned a lower self-perception to their health status. The burden of disease was observed mainly in physical function, role physical and bodily pain. The EQ-5D-3L dimensions show similar results: the intensity of problems is significantly more evident in respondents with self-reported RD. HRQoL of respondents with self-reported RD is related to sociodemographic variables and is significantly lower when compared with the Portuguese population. Four clusters of homogeneous respondents with self-reported RD were formed and characterized according to a number of variables. Factors associated with HRQoL were identified. In conclusion, suffering from a self-reported RD has a significant impact on self-perceived health status and on the quality of life.