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Keywords = work environment-related production loss

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26 pages, 711 KB  
Article
Algorithmic Management in Hospitality: Examining Hotel Employees’ Attitudes and Work–Life Balance Under AI-Driven HR Systems
by Milena Turčinović, Aleksandra Vujko and Vuk Mirčetić
Tour. Hosp. 2025, 6(4), 203; https://doi.org/10.3390/tourhosp6040203 - 4 Oct 2025
Viewed by 1337
Abstract
This study investigates hotel employees’ perceptions of AI-driven human resource (HR) management systems within the Accor Group’s properties across three major European cities: Paris, Berlin, and Amsterdam. These diverse urban contexts, spanning a broad portfolio of hotel brands from luxury to economy, provide [...] Read more.
This study investigates hotel employees’ perceptions of AI-driven human resource (HR) management systems within the Accor Group’s properties across three major European cities: Paris, Berlin, and Amsterdam. These diverse urban contexts, spanning a broad portfolio of hotel brands from luxury to economy, provide a rich setting for exploring how AI integration affects employee attitudes and work–life balance. A total of 437 employees participated in the survey, offering a robust dataset for structural equation modeling (SEM) analysis. Exploratory factor analysis identified two primary factors shaping perceptions: AI Perceptions, which encompasses employee views on AI’s impact on job performance, communication, recognition, and retention, and balanced management, reflecting attitudes toward fairness, personal consideration, productivity, and skill development in AI-managed environments. The results reveal a complex but optimistic view, where employees acknowledge AI’s potential to enhance operational efficiency and career optimism but also express concerns about flexibility loss and the need for human oversight. The findings underscore the importance of transparent communication, contextual sensitivity, and continuous training in implementing AI systems that support both organizational goals and employee well-being. This study contributes valuable insights to hospitality management by highlighting the relational and ethical dimensions of algorithmic HR systems across varied organizational and cultural settings. Full article
(This article belongs to the Special Issue Digital Transformation in Hospitality and Tourism)
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22 pages, 7050 KB  
Article
Designing for Special Neurological Conditions: Architecture Design Criteria for Anti-Misophonia and Anti-ADHD Spaces for Enhanced User Experience
by Yomna K. Abdallah
Architecture 2025, 5(4), 85; https://doi.org/10.3390/architecture5040085 - 23 Sep 2025
Viewed by 933
Abstract
ADHD and misophonia are developmental neurological disorders that are currently increasing in prevalence due to excessive acoustic and visual pollution. ADHD, which is characterized by a lack of attention and excessive impulsive hyperactivity, and misophonia, which is hypersensitivity to sounds accompanied by a [...] Read more.
ADHD and misophonia are developmental neurological disorders that are currently increasing in prevalence due to excessive acoustic and visual pollution. ADHD, which is characterized by a lack of attention and excessive impulsive hyperactivity, and misophonia, which is hypersensitivity to sounds accompanied by a severe emotional and psychological reaction, are both affected by the user’s spatial environment to a great extent. Spatial design can contribute to increasing or decreasing these unfavorable sensory triggers that affect individuals with ADHD and/or Misophonia. However, the role of architectural spatial design as a therapeutic approach to alleviate the symptoms of Misophonia and ADHD has never been proposed before in the literature, despite its accumulative and chronic effects on the user’s experience in everyday life in terms of well-being and productivity. Therefore, the current work discusses this problem of neglecting the potential effect of architectural spatial design on alleviating Misophonia and ADHD. Thus, the objective of the current work is to propose customized architectural spatial design as a therapeutic approach to alleviate Misophonia and ADHD through adopting the compatible architectural trends of minimal and metaphysical architecture. The methodology of the current work includes a theoretical proposal of this customized architectural spatial design for alleviating these two special neurological conditions. This includes introducing and analyzing these two neurological conditions and their relation to and interaction with architectural spatial design, analyzing minimal and metaphysical architectural trends employed in the proposed therapeutic architectural design, and then proposing augmented and virtual reality as auxiliary add-ons to the architectural spatial design to boost its therapeutic effect. Minimal architecture achieves the “no emotion” criteria through reduced forms, patterns, and colors and adopts simple geometry and natural materials to reduce sensory stressors or stimuli, in order to alleviate the loss of attention and distraction prevalent in those with ADHD, as well as allowing the employment of acoustic materials to achieve acoustic comfort and noise blockage for Misophonia relief. Metaphysical architecture leads the hierarchy of sensory experience through the symbolistic, dynamic, and enigmatic composition of forms and colors, which enhance the spatial analysis and cognitive capacities of the inhabitants. Meanwhile, the use of customized virtual and augmented reality environments is an effective add-on to minimal and metaphysical architectural spaces thanks to its proven therapeutic effect in alleviating various neurological disorders and injuries. At this level of intervention, VR/AR can be used as an add-on to minimal-architecture design, to simulate varied scenarios, as minimal design offers a clean canvas for simulating these varied virtual environments. The other option is to build these customized VR/AR scenarios around a specific architectural element as an add-on metaphysical architecture design to lead the sensory experience and enable the user to detach from the physical constraints of the space. AI-generated designs were used as a proof of concept for the proposed customized architectural spatial design following minimal and metaphysical architecture, as well as to provide AR and VR scenarios as add-on architecture to enhance the therapeutic effect of these architectural spaces for Misophonia and ADHD patients. Furthermore, the validity of VR/AR as a therapeutic approach, alongside the customized architectural design, was discussed, and it was concluded that this study proves the need for extended clinical studies on its efficiency in the long run, which will be conducted in the future. Full article
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22 pages, 262 KB  
Article
Healing Estranged Sorrows Through Narrative, Imaginal, and Mythic Amplification
by Daniel Boscaljon
Psychol. Int. 2025, 7(2), 42; https://doi.org/10.3390/psycholint7020042 - 22 May 2025
Viewed by 1360
Abstract
When children are raised in environments that lack important elements of supportive care needed for developing a healthy identity, it results in a kind of “loss” of what is archetypally expected but never received. This category of loss, which I call estranged sorrow, [...] Read more.
When children are raised in environments that lack important elements of supportive care needed for developing a healthy identity, it results in a kind of “loss” of what is archetypally expected but never received. This category of loss, which I call estranged sorrow, is not accounted for in the current literature of loss related to grief related to known losses. Most approaches to trauma are similar in emphasizing what happens based on events and neglecting on the trauma that results from developing in an environment without emotionally available caregivers. In this article, a theoretical essay, I work within the framework of depth psychology to trace how estranged sorrows might originate in our culture. I then use the method of amplification to provide three different ways that the productive imagination can be harnessed as a vital resource: narrative amplification, imaginal amplification, and mythic amplification. I explore how the imagination enables a grieving process that connects sorrow with words and images that can then be processed as a conscious experience, and ultimately allowed to become part of the biographical past rather than an unvoiced present. Full article
24 pages, 1741 KB  
Article
Understanding the Impacts of Rainfall Variability on Natural Forage–Livestock Dynamics in Arid and Semi-Arid Environments
by Thabo S. Nketsang, Semu Mitiku Kassa, Moatlhodi Kgosimore and Gizaw Mengistu Tsidu
Appl. Sci. 2025, 15(7), 3918; https://doi.org/10.3390/app15073918 - 3 Apr 2025
Cited by 3 | Viewed by 1193
Abstract
Arid and semi-arid environments are characterized by highly variable and unpredictable rainfall patterns, which significantly affect the structure and function of natural ecosystems. Understanding the interconnected relationship between climate variability, forage availability, and livestock dynamics in these regions is crucial to ensure sustainable [...] Read more.
Arid and semi-arid environments are characterized by highly variable and unpredictable rainfall patterns, which significantly affect the structure and function of natural ecosystems. Understanding the interconnected relationship between climate variability, forage availability, and livestock dynamics in these regions is crucial to ensure sustainable management. This study provides novel insights into the effects of rainfall variability on natural forage resources and livestock populations in Botswana. In this arid region, traditional livestock farming remains a key economic and food security pillar. By employing a mathematical model based on plant–herbivore interactions, this article quantitatively evaluates the impact of changes in rainfall timing and intensity on forage biomass and, subsequently, livestock populations. A robust analysis of critical threshold values for ecosystem sustainability is possible when real-world climate data are incorporated. This study examines the effects of harvesting and rainfall variability on livestock dynamics across different locations in Botswana. Delayed rainfall leads to a sharp decline in livestock, while Sehitlwa sees biomass loss without a notable reduction in herd size. In Kgagodi, for example, livestock numbers decline by 37% without harvesting, but they remain stable with controlled harvesting. Conversely, Letlhakeng experiences a 6% increase in livestock numbers despite delayed rainfall, which results in a biomass decline. Both Mabutsane and Letlhakeng maintain stable livestock numbers. The findings confirm that early and intense rainfall enhances livestock productivity, while delayed or reduced rainfall leads to population decline, aligning with observed trends in historical data. Additionally, the study underscores the potential of adaptive livestock harvesting strategies as a viable approach to mitigating climate-related risks in grazing systems. As this work integrates theoretical modeling with empirical climate data, it contributes to understanding arid land dynamics, providing a predictive method for assessing ecosystem responses to climate variability. These insights are invaluable for policymakers, conservationists, and local farmers seeking sustainable livestock management practices in the face of changing climatic conditions. Full article
(This article belongs to the Section Ecology Science and Engineering)
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11 pages, 2309 KB  
Article
Relationships Among Origin, Genotype, and Oenological Traits of Brettanomyces Yeasts
by Laura Canonico, Alice Agarbati, Francesca Comitini and Maurizio Ciani
Int. J. Mol. Sci. 2024, 25(21), 11781; https://doi.org/10.3390/ijms252111781 - 2 Nov 2024
Cited by 2 | Viewed by 2219
Abstract
Brettanomyces yeasts play a relevant role in the fermentation industry, showing controversial behavior. There is growing interest in these yeasts in the fermentation industry as beer and bioethanol production, while in winemaking, they are considered spoilage microorganisms mainly used to produce ethyl phenols. [...] Read more.
Brettanomyces yeasts play a relevant role in the fermentation industry, showing controversial behavior. There is growing interest in these yeasts in the fermentation industry as beer and bioethanol production, while in winemaking, they are considered spoilage microorganisms mainly used to produce ethyl phenols. These compounds may alter wine’s organoleptic characteristics, leading to significant economic loss. In this work, 45 Brettanomyces strains from seven different environments were genotyped and assayed for some oenological characters to investigate the possible relationship among sources of isolation, genotype characterization, and oenological characters. The results of biotyping showed four main clusters which were also distinguished according to the oenological characters. The oenological characters also distinguished the strains based on the isolation source, suggesting an overall relation between origin and biotypes. The negative correlation between fermentation rate and ethyl phenols production in the Brettanomyces population may indicate the adaptation to hostile environments differently from crop strains that showed the opposite behavior. The overall results contribute to clarifying some features of Brettanomyces yeasts, even if further investigations into the ability of these yeasts to colonize winemaking environments are needed. Full article
(This article belongs to the Special Issue Yeast: Molecular and Cell Biology: 2nd Edition)
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15 pages, 495 KB  
Article
Study on Psychological Stress Perceived among Employees in an Italian University during Mandatory and Voluntary Remote Working during and after the COVID-19 Pandemic
by Loreta Tobia, Pierpaolo Vittorini, Giulia Di Battista, Simona D’Onofrio, Giada Mastrangeli, Pietro Di Benedetto and Leila Fabiani
Int. J. Environ. Res. Public Health 2024, 21(4), 403; https://doi.org/10.3390/ijerph21040403 - 26 Mar 2024
Cited by 5 | Viewed by 3210
Abstract
Objective of the Study: This cross-sectional study examined the perceived psychological well-being of administrative/technical employees and researchers/lecturers at the University of L’Aquila (Italy) during the COVID-19 pandemic. The study was carried out in two different periods of 2022: April 2022, when remote working [...] Read more.
Objective of the Study: This cross-sectional study examined the perceived psychological well-being of administrative/technical employees and researchers/lecturers at the University of L’Aquila (Italy) during the COVID-19 pandemic. The study was carried out in two different periods of 2022: April 2022, when remote working was still mandatory, and December 2022, when the pandemic emergency had ended and, in Italy, remote working had become voluntary for two days a week and exclusively for administrative staff. Materials and Methods: Perceived psychological well-being was investigated using the GHQ-12 (Global Health Questionnaire, short-form with 12 items), a self-administered questionnaire created on Google Forms and sent via email to all the employees of the University of L’Aquila. Statistical analysis was conducted using means, standard deviations, and frequency tables for the descriptive analysis of socio-demographic data, while the t-test or Wilcoxon test and the Χ2 test were used to verify the statistical difference and association between categorical variables. Results: Overall, 365 employees, including 118 administrative/technical and 247 research/teaching staff, participated in the survey in April 2022 when remote working was mandatory. Among them, 219 (52.8%) were female and 196 (47.2%) were male. In December 2022, 266 employees engaged in voluntary remote working, including 184 (69.2%) women and 82 (30.8%) men, took part in the study. The most represented age group was 50–59 years old (36.3% of study participants). During mandatory remote working, 83.4% of lecturers reported a perceived level of psychological distress ranging from moderate to severe versus 69.5% of technicians. The percentage of self-reported psychological distress was higher among the technicians forced to work from home (n. 118–42.9%) vs. the technicians working from home on a voluntary basis (n. 157–57.1%), with GHQ score being >14 in 65.5% of enforced remote workers vs. 62.3% of voluntary remote workers. During mandatory remote working, there was a significant difference in the GHQ-12 score between administrative and research staff, particularly related to items such as loss of self-confidence, emotional pressures, and diminished productivity. Moreover, from the comparison between the group of administrative staff engaged in mandatory remote working and those in voluntary remote working for specific GHQ-12 items, a statistically significant difference emerged concerning the perception of not being able to overcome difficulties; the GHQ-12 score was higher in the first group. Significant differences in the overall GHQ-12 score were evident between male and female lecturers, as the latter reported higher levels of perceived stress during mandatory remote working. Discussion: The results confirm that remote working could be associated with a better psychological state of administrative university staff, especially in the case of voluntary remote working. During mandatory remote working, a difference was observed between teaching and administrative staff, with higher stress in the first group and among women. Therefore, our sample appears fragmented in the self-assessment of psychological well-being during remote working, possibly due to profound differences in the organization of work activities between lecturers and administrative employees. Additionally, the increased perception of stress by female lecturers compared to males may reflect gender disparities, as women working from home during the pandemic experienced an increased workload including domestic activities. Conclusions: Remote working is a type of working that has both advantages and disadvantages. An advantage is undoubtedly a better work–life balance; however, the risks of technostress, workaholism, increased sedentary behaviour, and social isolation are negative aspects. This study provides an indicative overview of the psychological state related to remote working in a university setting during the SARS-CoV-2 pandemic. The study might therefore serve as a starting point for further research on the impact of remote working on self-reported psychological well-being, especially in the university environment. Full article
24 pages, 6503 KB  
Article
Indenopyrene and Blue-Light Co-Exposure Impairs the Tightly Controlled Activation of Xenobiotic Metabolism in Retinal Pigment Epithelial Cells: A Mechanism for Synergistic Toxicity
by Corinne Zinflou and Patrick J. Rochette
Int. J. Mol. Sci. 2023, 24(24), 17385; https://doi.org/10.3390/ijms242417385 - 12 Dec 2023
Cited by 3 | Viewed by 1671
Abstract
High energy visible (HEV) blue light is an increasing source of concern for visual health. Polycyclic aromatic hydrocarbons (PAH), a group of compounds found in high concentrations in smokers and polluted environments, accumulate in the retinal pigment epithelium (RPE). HEV absorption by indeno [...] Read more.
High energy visible (HEV) blue light is an increasing source of concern for visual health. Polycyclic aromatic hydrocarbons (PAH), a group of compounds found in high concentrations in smokers and polluted environments, accumulate in the retinal pigment epithelium (RPE). HEV absorption by indeno [1,2,3-cd]pyrene (IcdP), a common PAH, synergizes their toxicities and promotes degenerative changes in RPE cells comparable to the ones observed in age-related macular degeneration. In this study, we decipher the processes underlying IcdP and HEV synergic toxicity in human RPE cells. We found that IcdP-HEV toxicity is caused by the loss of the tight coupling between the two metabolic phases ensuring IcdP efficient detoxification. Indeed, IcdP/HEV co-exposure induces an overactivation of key actors in phase I metabolism. IcdP/HEV interaction is also associated with a downregulation of proteins involved in phase II. Our data thus indicate that phase II is hindered in response to co-exposure and that it is insufficient to sustain the enhanced phase I induction. This is reflected by an accelerated production of endogenous reactive oxygen species (ROS) and an increased accumulation of IcdP-related bulky DNA damage. Our work raises the prospect that lifestyle and environmental pollution may be significant modulators of HEV toxicity in the retina. Full article
(This article belongs to the Section Molecular Biology)
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26 pages, 1011 KB  
Article
Preventing Workplace Sexual Harassment and Productivity Loss during Crisis Periods: The Protective Role of Equitable Management
by Arístides Vara-Horna, Zaida Asencios-Gonzalez, Liliana Quipuzco-Chicata, Alberto Díaz-Rosillo and Dante Supo-Rojas
Sustainability 2023, 15(23), 16195; https://doi.org/10.3390/su152316195 - 22 Nov 2023
Viewed by 5041
Abstract
This study examines the role of equitable management in preventing sexual harassment in the workplace and a loss of productivity during periods of crisis due to natural or social disasters. A structured survey of 445 women from 76 companies in five regions of [...] Read more.
This study examines the role of equitable management in preventing sexual harassment in the workplace and a loss of productivity during periods of crisis due to natural or social disasters. A structured survey of 445 women from 76 companies in five regions of northern Peru and a structural equation analysis show that companies that implement equitable management can mitigate the adverse effects of social conflicts and natural disasters. These findings indicate that equitable management is inversely related to counterproductive behaviors (β = −0.259, p < 0.001), sexual harassment at work (β = −0.349, p < 0.001), and turnover intention (β = −0.527, p < 0.001) and is positively associated with organizational citizenship behaviors (β = 0.204, p < 0.001) and psychological empowerment (β = 0.240, p < 0.001). Social conflicts and natural disasters, on the other hand, increase workplace sexual harassment (β = 0.244, p = 0.027) and intention to quit (β = 0.252, p < 0.001) and have a considerable impact on the loss of work productivity (β = 0.662, p < 0.001). However, in companies with fairer and more equitable management, this impact is much smaller and mitigated by these good practices. This suggests that equitable management protects against and prevents sexual harassment at work. In addition, it acts as a mechanism that enhances organizational citizenship behaviors and attitudes in the workplace which remain even in adverse external environments. This is an effective tool and strategy for maintaining productivity and organizational resilience in difficult times. Full article
(This article belongs to the Special Issue Organizational Psychology and Sustainable Occupational Health)
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29 pages, 15018 KB  
Article
Housing and Food Production: Resident and Grower Perceptions of Peri-Urban Food-Production Landscapes
by Shannon Davis, Guanyu Chen and Naomi Darvill
Land 2023, 12(12), 2091; https://doi.org/10.3390/land12122091 - 21 Nov 2023
Cited by 3 | Viewed by 2562
Abstract
The loss of productive soils and food-producing landscapes on the edges of cities is an increasing issue facing Aotearoa New Zealand. Like many countries globally, New Zealand’s largest cities are facing rapid expansion because of increasing urbanisation, with high levels of low-density residential [...] Read more.
The loss of productive soils and food-producing landscapes on the edges of cities is an increasing issue facing Aotearoa New Zealand. Like many countries globally, New Zealand’s largest cities are facing rapid expansion because of increasing urbanisation, with high levels of low-density residential sprawl into the productive peri-urban hinterlands and increasing rates of ‘reverse sensitivity’. Food production, as a result, is being pushed further away, disconnected from the communities it serves, and often onto less productive soil. This paper explores the perceptions and attitudes of both peri-urban residents and food producers living and working within the peri-urban zone of Ōtautahi Christchurch. Conducting two surveys, one with residents and another with producers, respondents’ perceptions of food growing within this peri-urban landscape are explored to better understand the enablers and barriers of growing food close to cities. Overall, the results indicated that peri-urban residents appreciate food being produced close to where they live, with over 90% of residential respondents feeling either ‘mostly positive’ or ‘extremely positive’ towards food being grown close to their homes. Of greatest concern for peri-urban residents were issues relating to negative impacts on the environment and human health, with particular concern for water quality. The lack of accessibility to locally produced food was also identified as an area of concern to residents. Food producers felt less positive towards operating their food-production enterprises within the peri-urban zone, identifying a range of issues impacting their experience. The information rendered from these surveys provides a base for future land-use planning consideration within the peri-urban zone, where both food production and housing can co-exist. Full article
(This article belongs to the Special Issue Urban Sprawl: Spatial Planning, Vision Making and Externalities)
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22 pages, 7077 KB  
Article
Design and Analysis of a Temperature-Sensitive Thermal Meta-Regulator Possessing Different Heat Distribution Modes
by Yiyi Li, Haochun Zhang, Yingjie Chen and Jian Zhang
Energies 2023, 16(15), 5807; https://doi.org/10.3390/en16155807 - 4 Aug 2023
Cited by 2 | Viewed by 1575
Abstract
The control and regulation of thermal fields is of great significance in solving various thermal management problems in human life. Benefitting from the emerging space transformation technique and thermal meta-material, thermal meta-structures with unique thermal control capabilities have been rapidly developed in recent [...] Read more.
The control and regulation of thermal fields is of great significance in solving various thermal management problems in human life. Benefitting from the emerging space transformation technique and thermal meta-material, thermal meta-structures with unique thermal control capabilities have been rapidly developed in recent years. However, the exploration of the functional diversity of thermal meta-materials and structures is still inadequate; most related works are still limited to the single-field control effect and lack sensitivity to external environment changes. For the designed functional structures, observation and analysis of energy fluctuations and irreversible heat loss during the regulation process of the diffusive thermal field are also scare. Therefore, in this current work, we design a thermal meta-regulator (based on the space transformation theory) that is capable of differently distributing thermal energy according to the heat input direction and switching field control pattern with the change of ambient temperature. In addition to the common indicator of temperature, we also introduce the local entropy production rate and the total entropy production in the thermo-dynamic category to carry out entropy analysis of the energy processes involved in the thermal meta-regulator, making a multi-angle evaluation of the structural performance. Furthermore, we use the statistical response surface method to explore the comprehensive/interaction effect of multiple influencing factors on the thermal meta-regulator; the derived regression equations can be used to accurately predict the structural effects under different design schemes and temperature conditions. Our work further enriches the diversity and flexibility of thermal field manipulation manners and the demonstrated functions are also expected to be realized in other physical fields. Full article
(This article belongs to the Section J: Thermal Management)
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9 pages, 447 KB  
Communication
Organizational Change: The Challenge of Change Aversion
by Jason A. Hubbart
Adm. Sci. 2023, 13(7), 162; https://doi.org/10.3390/admsci13070162 - 7 Jul 2023
Cited by 33 | Viewed by 64857
Abstract
Organizational change has been investigated for decades, with many works addressing change adoption challenges. Change aversion, like change resistance, is not uncommon, but going unchecked can reduce organizational change initiative success. This communication aims to provide a concise in-road for students and practitioners [...] Read more.
Organizational change has been investigated for decades, with many works addressing change adoption challenges. Change aversion, like change resistance, is not uncommon, but going unchecked can reduce organizational change initiative success. This communication aims to provide a concise in-road for students and practitioners to the organizational change and change aversion literature. An attempt is made to enter this complicated discussion in a way that may assist the reader in understanding what change aversion is, how vital acceptance of organizational change is, and that there are operational practices that can facilitate a culture of change acceptance. Aversion to change may result from many factors, including (but not limited to) fear of the unknown, discomfort over a potential loss of control, and the instinctive tendency to prefer the familiar over the unfamiliar. However, despite advancements in the administration of inevitable organizational change moments, challenges related to change resistance can always occur, particularly lacking effective change leadership. Leadership can address resistance early, thus more readily guaranteeing a positive and productive organizational change outcome. Offering employees quality jobs and an inclusive, empathetic, and considerate environment can lead to early organizational buy-in and change acceptance, thereby improving long-term organization efficiencies and outputs. Ultimately, organizational change initiatives are most likely to succeed with buy-in and acceptance, thereby enabling businesses to remain competitive in a continuously evolving environment. Full article
(This article belongs to the Section Organizational Behavior)
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27 pages, 3261 KB  
Review
Impact of Indoor Air Pollution in Pakistan—Causes and Management
by Ayesha Kausar, Ishaq Ahmad, Tianle Zhu and Hassan Shahzad
Pollutants 2023, 3(2), 293-319; https://doi.org/10.3390/pollutants3020021 - 6 Jun 2023
Cited by 3 | Viewed by 18302
Abstract
This state-of-the-art review is designed to provide a factual analysis of indoor air pollution in Pakistan. Primarily, the main sources of indoor air pollution and related air pollutants were analyzed. Key sources of indoor air pollution include household energy sources (biomass, wood, coal, [...] Read more.
This state-of-the-art review is designed to provide a factual analysis of indoor air pollution in Pakistan. Primarily, the main sources of indoor air pollution and related air pollutants were analyzed. Key sources of indoor air pollution include household energy sources (biomass, wood, coal, tobacco, and low temperatures) producing particulate matter (PM), dust particles, smoke, COx, noxious gases, bioaerosols, airborne microflora, and flame retardants. According to the literature, rural regions of Pakistan using biomass indoor fuels have a high indoor PM concentration in the range of 4000–9000 μg/m3. In rural/urban regions, indoor smoking also leads to high PM2.5 levels of ~1800 μg/m3, which can cause pulmonary infections. In hospitals, PM concentrations were detected up to 1000 μg/m3, causing repeated infections in patients. Indoor ingestion of dust containing polychlorinated biphenyl concentrations was observed at high levels (~8.79–34.39 ng/g) in cities; this can cause serious health effects such as cancer risks and a loss of working productivity. Moreover, indoor microflora and bacteria (~10,000–15,000 cfu m−3) in urban/rural regions cause respiratory/cancer risks. In this context, indoor air quality (IAQ) monitoring and management strategies have been somewhat developed; however, their implementation in Pakistan’s rural/urban indoor environments is still needed. Various challenges were identified for monitoring/regulating IAQ. There is a firm need for industry–academia–research cooperation and for the involvement of government/agencies to support indoor air pollution control/management and for intervention strategies. Full article
(This article belongs to the Section Air Pollution)
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13 pages, 9623 KB  
Article
Effect of Tropical Marine Atmospheric Environment on Corrosion Behaviour of the 7B04-T74 Aluminium Alloy
by Ning Li, Weifang Zhang, Xiaojun Yan, Meng Zhang, Lu Han and Yikun Cai
Metals 2023, 13(5), 995; https://doi.org/10.3390/met13050995 - 21 May 2023
Cited by 9 | Viewed by 3691
Abstract
In this work, the effects of the tropical marine atmospheric environment on the corrosion behaviour of the 7B04-T74 aluminium alloy were systematically investigated by using accelerated testing, together with corrosion kinetic analysis, microstructure observation, product composition analysis, and potentiodynamic polarization curve tests. The [...] Read more.
In this work, the effects of the tropical marine atmospheric environment on the corrosion behaviour of the 7B04-T74 aluminium alloy were systematically investigated by using accelerated testing, together with corrosion kinetic analysis, microstructure observation, product composition analysis, and potentiodynamic polarization curve tests. The weight loss method was used for the corrosion kinetics analysis. The surface morphology and corrosion products transformation law were investigated by OM, SEM, EDS, and XPS. The electrochemical characteristics were studied using potentiodynamic polarization curves. The research indicated that the 7B04-T74 aluminium alloy has eminent corrosion resistance in the tropical marine atmospheric environment. Localized pitting corrosion occurred rapidly in the tropical marine atmosphere. In the later stage of corrosion, the corrosion of aluminium alloy did not become serious. Specifically, no obvious intergranular corrosion was found, which is related to the thermal treatment method. Corrosion products included Al(OH)3, Al2O3, and AlCl3, of which Al(OH)3 is the most notable. Full article
(This article belongs to the Special Issue Corrosion Prediction in Different Environment)
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13 pages, 55503 KB  
Article
Research on Postcuring Parameters Effect on the Properties of Fiberglass-Reinforced Silicone Resin Coil Bobbin
by Hongmei He, Qiqi He, Hongchen Gao, Wei Hu and Song Xue
Materials 2023, 16(7), 2588; https://doi.org/10.3390/ma16072588 - 24 Mar 2023
Cited by 1 | Viewed by 1899
Abstract
With the growing demand for insulation parts in extreme service environments, such as nuclear power, aviation, and other related fields, fiberglass-reinforced silicone resin (FRSR) has become a popular choice due to its exceptional physical and chemical properties in high-temperature and electromagnetic working environments. [...] Read more.
With the growing demand for insulation parts in extreme service environments, such as nuclear power, aviation, and other related fields, fiberglass-reinforced silicone resin (FRSR) has become a popular choice due to its exceptional physical and chemical properties in high-temperature and electromagnetic working environments. To enhance the performance of FRSR molded parts that can adapt to more demanding extreme environments, the oven postcuring process parameters on thermal stability and mechanical properties of the bobbin were investigated. The curing behavior of FRSR was analyzed by using thermogravimetric analysis (TGA) and the differential scanning calorimetry (DSC) method, and the bobbins were manufactured based on the testing results. Subsequently, the bobbins were oven postcured at different conditions, and the heat resistance and mechanical properties were analyzed by TGA and tensile tests. The results revealed that the tensile strength of the bobbin increased by 122%, and the weight loss decreased by 0.79% at 350 °C after baking at 175 °C for 24 h. The optimal process parameters for producing bobbins to meet the criteria of nuclear installations were determined to be a molding temperature of 120 °C, molding pressure of 50 MPa, pressure holding time of 3 min, oven postcuring temperature of 175 °C, and postcuring time of 24 h. The molded products have passed the thermal aging performance test of nuclear power units. Full article
(This article belongs to the Special Issue Research on Heat Treatment of Advanced Metallic Materials)
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20 pages, 8598 KB  
Article
Passive Hydrogen Recombination during a Beyond Design Basis Accident in a Fusion DEMO Plant
by Matteo D’Onorio, Tommaso Glingler, Guido Mazzini, Maria Teresa Porfiri and Gianfranco Caruso
Energies 2023, 16(6), 2569; https://doi.org/10.3390/en16062569 - 8 Mar 2023
Cited by 5 | Viewed by 2105
Abstract
One of the most important environmental and safety concerns in nuclear fusion plants is the confinement of radioactive substances into the reactor buildings during both normal operations and accidental conditions. For this reason, hydrogen build-up and subsequent ignition must be avoided, since the [...] Read more.
One of the most important environmental and safety concerns in nuclear fusion plants is the confinement of radioactive substances into the reactor buildings during both normal operations and accidental conditions. For this reason, hydrogen build-up and subsequent ignition must be avoided, since the pressure and energy generated may threaten the integrity of the confinement structures, causing the dispersion of radioactive and toxic products toward the public environment. Potentially dangerous sources of hydrogen are related to the exothermal oxidation reactions between steam and plasma-facing components or hot dust, which could occur during accidents such as the in-vessel loss of coolant or a wet bypass. The research of technical solutions to avoid the risk of a hydrogen explosion in large fusion power plants is still in progress. In the safety and environment work package of the EUROfusion consortium, activities are ongoing to study solutions to mitigate the hydrogen explosion risk. The main objective is to preclude the occurrence of flammable gas mixtures. One identified solution could deal with the installation of passive autocatalytic recombiners into the atmosphere of the vacuum vessel pressure suppression system tanks. A model to control the PARs recombination capacity as a function of thermal-hydraulic parameters of suppression tanks has been modeled in MELCOR. This paper aims to test the theoretical effectiveness of the PAR intervention during an in-vessel loss of coolant accident without the intervention of the decay heat removal system for the Water-Cooled LithiumLead concept of EU-DEMO. Full article
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