Search Results (1,562)

The calculation of internal forces is a critical aspect in the design of statically indeterminate structures. Local trapezoidal loads, as a common loading configuration in practical engineering (e.g., earth pressure, uneven surcharge), make it essential to investigate how to compute the internal forces of statically indeterminate structures under such loads by using the displacement method. The key to displacement-based analysis lies in deriving the fixed-end moment formulas for local trapezoidal loads. Traditional methods, such as the force method, virtual beam method, or integral method, often involve complex computations. Therefore, this study aims to derive a general formula for fixed-end moments in statically indeterminate beams subjected to local trapezoidal loads by using the integral method, providing a more efficient and clear theoretical tool for engineering practice while addressing the limitations of existing educational and applied methodologies. The integral method is employed to derive fixed-end moment expressions for three types of statically indeterminate beams: (1) a beam fixed at both ends, (2) an an-end-fixed another-end-simple-support beam, and (3) a beam fixed at one end and sliding at the other. This approach eliminates the redundant equations of the traditional force method or the indirect transformations of the virtual beam method, directly linking boundary conditions through integral operations on load distributions, thereby significantly simplifying the solving process. Three representative numerical examples validate the correctness and universality of the derived formulas. The results demonstrate that the solutions obtained via the integral method align with software-calculated results, yet the proposed method yields analytical expressions for structural internal forces. Comparative analysis shows that the integral method surpasses traditional approaches (e.g., force method, virtual beam method) in terms of conceptual clarity and computational efficiency, making it particularly suitable for instructional demonstrations and rapid engineering calculations. The proposed integral method provides a systematic analytical framework for the internal force analysis of statically indeterminate structures under local trapezoidal loads, combining mathematical rigor with engineering practicality. The derived formulas can be directly applied to real-world designs, substantially reducing computational complexity. Moreover, this method offers a more intuitive theoretical case for structural mechanics education, enhancing students’ understanding of the mathematical–mechanical relationship between loads and internal forces. The research outcomes hold both theoretical significance and practical engineering value, establishing a solving paradigm for the displacement-based analysis of statically indeterminate structures under complex local trapezoidal loading conditions. Full article

Background: attention-deficit/hyperactivity disorder (ADHD) and Alzheimer’s disease (AD) are distinct neurological conditions that may share genetic and molecular underpinnings. ADHD, a neurodevelopmental disorder, affects approximately 5% of children and 3% of adults globally, while AD, a neurodegenerative disorder, is the leading cause of dementia in older adults. Emerging evidence suggests potential overlapping contributors, including pathways related to synaptic plasticity, neuroinflammation, and oxidative stress. Methods: this systematic review investigated potential genetic predispositions linking Attention-Deficit/Hyperactivity Disorder (ADHD) and Alzheimer’s Disease (AD). Following PRISMA guidelines, a search was conducted in Web of Science, Embase, PsycINFO, and PubMed using keywords related to ADHD, AD, and genetic factors. Studies included were original human studies utilizing genetic analyses and ADHD polygenic risk scores (PRS), with AD confirmed using established diagnostic criteria. Exclusion criteria comprised non-original studies, animal research, and articles not addressing genetic links between ADHD and AD. Screening was conducted with Rayyan software, assessing relevance based on titles, abstracts, and full texts. Results:. The search identified 1450 records, of which 1092 were screened after duplicates were removed. Following exclusions, two studies met inclusion criteria. One study analyzed ADHD-PRS in 212 cognitively unimpaired older adults using amyloid-beta (Aβ) PET imaging and tau biomarkers. The findings revealed that ADHD-PRS was associated with progressive cognitive decline, increased tau pathology, and frontoparietal atrophy in Aβ-positive individuals, suggesting that ADHD genetic liability may exacerbate AD pathology. Another study assessed ADHD-PRS in a cohort of 10,645 Swedish twins, examining its association with 16 somatic conditions. The results showed modest risk increases for cardiometabolic, autoimmune, and neurological conditions, with mediation effects through BMI, education, tobacco use, and alcohol misuse, but no direct link between ADHD-PRS and dementia. Discussion and conclusion: this review highlights preliminary but conflicting evidence for a genetic intersection between ADHD and AD. One study suggests that ADHD genetic liability may exacerbate AD-related pathology in Aβ-positive individuals, whereas another large registry-based study finds no direct link to dementia, with associations largely mediated by lifestyle factors. The potential ADHD–AD relationship is likely complex and context-dependent, influenced by biomarker status and environmental confounders. Longitudinal studies integrating genetics, biomarkers, and detailed lifestyle data are needed to clarify this relationship. Full article

This article aims to create insights concerning the remuneration of executives (also known as vice chancellors (VCs)) in higher education in South Africa. Their remuneration is a trending and contentious topic in the media and literature within the South African context. The motivation for conducting this study is that there are no clear indicators, norms, or standards to measure salaries. Therefore, this study is grounded in agency and institutional theories. Moreover, prior to this study, there were no longitudinal studies in the South African context that have analysed VCs’ salaries, using predictors like student enrolment, return on assets, debt ratio, and revenue. The research design was longitudinal, while the research approach was quantitative. The universities that did not meet the requirements for 2016 to 2023 were excluded from the analysis, which was conducted using Python, version 3.11.7, Python Software Foundation: Wilmington, DE, USA, 2025. Since the data points were small (n = 8), bootstrapping was used to resample 1000 samples. The correlation results showed a significant relationship with the fixed salary, whereas the regression results were not significant. It was found that the VCs’ salary is a larger portion of the fixed salary, and the historical data (2013 to 2016) showed an upward trend; the forecast from 2024 to 2026 showed a flat trend. The forecasts are salient and create insights that will assist remuneration practitioners to budget for VCs’ salaries in order to attract, motivate, and retain them. Full article

The Sohodol Gorges has become a location of interest for tourists seeking ecological experiences and outdoor activities. The main purpose of the present study is to evaluate the attitudes of Romanian tourists toward the development of geotourism in this region following the COVID-19 pandemic. In conjunction with the research questions, hypotheses, variables, and research methodology, the following research objectives were emphasized in this study of the Oltenia region: (1) investigate how certain socio-demographic variables, such as age, gender, level of education, and occupation, influence tourists’ perceptions of the various aspects of geotourism development in the Sohodol Gorges; (2) analyze the different dimensions of geotourism, including its economic, ecological, and socio-cultural impacts, thus contributing to a deeper understanding of how geotourism is perceived in the study area in the post-pandemic context. For a qualitative evaluation of the information presented in this study, the authors used a qualitative survey with open questions and closed questions as a data collection method. For data processing and analysis, the EViews version 12.0 software package was used, enabling complex statistical analyses such as multiple regressions and correlation coefficient determination. These techniques were essential for identifying and interpreting the relationships between demographic variables and tourist perceptions. The research results provide a detailed picture of the influence that demographic and behavioral factors have on tourists’ perceptions in the context of post-COVID-19 geotourism development in the Sohodol Gorges of Romania. Education level and age play a significant role in shaping economic and environmental perceptions, indicating that tourists with higher education levels are more aware of the economic and ecological impact of tourism. Full article

The technical and technological advances of recent years in the field of real-time photorealistic rendering have enabled enormous development in virtual production. However, the democratization of this technology faces two main obstacles: the high economic cost of implementation and the high complexity of the necessary software. This paper studies three virtual production software solutions that represent different stages in the democratization process of the technology, ranging from the professional software InfinitySet, to the more generalist and educational environment Edison, and to the cloud version of this same software, Edison OnCloud. To this end, an analysis of their functionalities and interfaces is conducted, the SUS questionnaire is applied, and the three systems are evaluated from the perspective of Nielsen’s usability principles. These tests demonstrate the complexity of the professional software InfinitySet, making it unapproachable for non-expert users without extensive previous training. On the other hand, both Edison and Edison OnCloud show significant usability improvements through limiting and reducing functionalities, which also results in a reduction in implementation costs, making the use of the technology feasible in non-professional environments, such as in education or for streamers. Full article

Background/Objectives: The occurrence of non-communicable diseases (NCDs) globally is rising rapidly, largely due to modifiable risk factors such as unhealthy diets. Studies have shown that poor dietary habits are prevalent among university students and may persist in later life, increasing the risk of chronic health conditions. The objective of this study was to evaluate the diet of two different groups of university students, in the United Arab Emirates (UAE) and United Kingdom (UK), with the aim of identifying areas for intervention to improve overall health and wellbeing. Methods: Detailed 7-day diet diaries were collected from undergraduate university participants in the UAE and UK. Diet diaries were quantitatively assessed using Nutritics software generating reports on mean intakes for energy, macro- and micronutrients. Independent sample t-tests were utilized to compare nutrient intake between cohorts in the two different regions. Results: A total of 158 students participated in this study. Results showed significant differences in intake levels in most macronutrients and micronutrients (p ≤ 0.05). Upon comparison, UK participants consumed diets higher in sugar (+9.4 g/day), saturated fat (+4.2 g/day), cholesterol (+90 mg/day), and sodium (+307 mg/day) compared to their UAE counterparts, placing them at risk of cardiovascular diseases (CVDs). Cholesterol intake was oversufficient in both UAE and UK males by 40% and 57%, respectively. In UAE females, there were notable deficiencies in protein intake, omega 3, vitamin D, iron, iodine, and folic acid (p ≤ 0.05), placing them at risk of CVDs, anemia, diabetes, and cancer. Interestingly, both UAE males and females were 100% deficient in dietary vitamin D intake. Conclusions: Nutritional imbalances should be addressed through campus-based nutrition education programs. This study also highlights the importance of dietary guidelines targeted at specific populations accounting for cultural differences. Full article

Tobacco smoking remains a critical public health concern in Indonesia, particularly in Aceh Province, where male smoking prevalence reaches 56.12%. Cultural permissiveness and weak enforcement of tobacco control regulations have contributed to this high prevalence. Women, especially wives, are central figures in family health and may play an essential role in influencing household smoking behavior. However, their roles and strategies remain underexplored, especially in conservative cultural settings. This qualitative study employed a Participatory Action Research (PAR) approach to examine the roles of women in controlling the smoking behavior of family members in Aceh. A total of 75 research subjects were selected from three districts (Aceh Singkil, Gayo Lues, and Pidie Jaya) using a combination of purposive sampling and snowball sampling methods. Data were collected through semi-structured in-depth interviews and were analyzed thematically using NVivo 15 software. The analysis framework was based on Lawrence Green’s PRECEDE model, which includes predisposing, enabling, and reinforcing factors. This study found that women demonstrated progressive attitudes toward smoking, evolving from passive acceptance to active responsibility. They employed both persuasive strategies (health education, emotional appeals, and motivation) and coercive actions (household smoking bans, threats, and withdrawal of privileges). Women also positioned themselves as health monitors and guardians within the household. Despite cultural limitations and gender hierarchy, many participants reported partial or complete success in encouraging their husbands to quit smoking, particularly when supported by religious norms and health awareness. Women play a pivotal role in shaping smoking-related behavior in the family. Empowering women through participatory frameworks and culturally tailored interventions can enhance their effectiveness as health advocates. This study underscores the need to integrate gender-sensitive strategies into national tobacco control policies, especially in culturally conservative regions. Full article

Inclusive education is a legal right, and its origin is linked to human rights, which has established a resonance in global movements. In this study, we analyzed inclusive pedagogical practices that favor creativity in the high school context. We chose to carry out a qualitative scoping systematic review and defined the inclusion and exclusion criteria in advance to guide the team’s work. We selected articles from the Web of Science database on 14 April 2025 (registration: INPLASY202570121; (registered 30 July 2025)), and we performed a quality control check on the reporting using the PRISMA-ScR checklist. We established the timeframe between 2008 and 2025 and identified 368 articles, of which 25 were chosen for this study. The data were analyzed with the support of Rayyan and VOSviewer software (version 1.6.20). The findings demonstrate a wide range of practices developed across diverse high school contexts employing multiple strategies that advance an inclusive perspective. Moreover, among these strategies, several explicitly foster creativity through varied resources, collaborative work, and the use of assistive technologies. Overall, the articles show a significant convergence around multifaceted approaches that design and implement innovative strategies to address student diversity. Full article

How to continuously motivate college students to participate in voluntary activities has always been one of the burning issues in the field of educational psychology research. Based on the activation theory, this study constructed and tested a moderated mediation model to explore how to improve college students’ volunteer service motivation and behavior from the perspective of agreeableness traits and examined the moderating role of social support. By collecting three-wave time lagged data from 408 Chinese college students (59.6% female, age 18–22, means = 19.8, SD = 1.2), SPSS and Amos software were used to test the research hypotheses and the whole model. The results show that agreeableness traits of college students have a significant positive influence on their volunteer service motivation and behaviors. Volunteer service motivation mediates the positive influence of agreeableness traits on volunteer service behaviors. The social support perceived by college students positively moderates the impact of agreeableness traits on their volunteer service motivation and then promotes their volunteer service behaviors. These findings not only enrich the research literature on college students’ personality traits, volunteer service, and social support, but also provide some suggestions on how to motivate college students to participate in volunteer service from the three aspects of personality, motivation, and social support. Full article

With the growing adoption of CLO 3D in the fashion industry and educational settings, the need for accurate material representation and fit simulation in virtual environments is increasing. This study aimed to evaluate whether CLO 3D, without the aid of physical samples, can reliably simulate clothing pressure for compression wear made from different materials. Unlike previous CLO 3D studies that focused on design or pattern accuracy, this study critically examined material-specific simulation limitations and proposed technical enhancements. Two types of leggings with varying spandex content were tested across five yoga poses using the CLO 3D software(version 2024.2.214). The results showed that CLO 3D did not detect differences in clothing pressure caused by variations in spandex content. Furthermore, the pressure values remained constant across different poses for both fabrics, failing to reflect realistic mechanical differences. The highest total clothing pressure was recorded in the Lunge pose (277.02 kPa), and the lowest in the Plow pose (241.37 kPa). These findings suggest that the current simulation engine lacks sensitivity to fabric-specific mechanical properties and movement-based variation. To address these limitations, this study proposes five optimization functions for CLO 3D, including material property input, technical textile databases, environmental condition settings, AI-based comfort prediction, and data management tools. These proposals are expected to strengthen the scientific validity, functional realism, and user-centered applicability of CLO 3D in designing sportswear, medical compression garments, and customized apparel. Full article

Background/Objectives: Historically, humankind has consistently regarded death as an uncomfortable topic. Although death and dying are unescapable, they are frequently overlooked in formal education, as discussing or acknowledging them is believed to provoke emotional or psychological discomfort. To the best of our knowledge, little is known about the influence of the fear of death on the lives of university students. To fill this gap, this study aimed to examine the relationship between the concept of a good death, fear of death and self-compassion among university students in Portugal. Methods: This cross-sectional study was conducted in Portugal between November 2024 and January 2025 with 310 university students using an e-survey. Personal questionnaire and the Portuguese versions of the Good Death Concept Scale, the Collett-Lester Fear of Death Scale, and the Self-Compassion Scale were used. JAMOVI statistical software (version 2.7.6.) was used for descriptive analysis, independent sample t-tests, one-way ANOVA with post hoc analysis, and Pearson correlation analysis. To identify the factors associated with fear of death, a multiple linear regression analysis was conducted. This study adhered to the STROBE checklist for reporting. Results: A total of 310 students were included. The average age was 25 ± 8.52 years, and 75.2% were female. The total mean score for fear of death was 99.22 ± 21.97, indicating relatively low fear levels. However, health sciences students presented higher fear of death rates compared with non-health counterparts. Age and gender differences were also found, with female and younger students reporting significantly higher levels of fear of death (p < 0.01). The Pearson correlation matrix indicated that fear of death is positively correlated with the concept of a good death, while negatively correlated with self-compassion (p < 0.01). Key factors influencing fear of death include age, gender, closure and control domains, and the overidentification subscale (adjusted R-Squared valued [R2] = 0.352). Conclusions: The results suggest that students are often poorly prepared to deal with death-related issues (revealing fear) and with negative thoughts and feelings about mortality. In this vein, it is necessary to implement curricular educational interventions focusing on death education as well as actively involving students in compassionate community initiatives, increasing their awareness and self-confidence about EoL care. Full article

The convection-diffusion-reaction (CDR) equation is a fundamental mathematical model for simulating the transport of pollutants. It is a crucial tool for addressing global environmental challenges. However, most existing computational solutions are proprietary and inaccessible, making the development of open-source educational platforms with advanced stabilization capabilities necessary. This study developed and validated a computational framework that solves CDR equations using algebraic sub-grid scale (ASGS) stabilization. The research addressed the fundamental challenge of spurious oscillations that emerge in standard Galerkin formulations when convective transport significantly exceeds diffusive processes. This is a prevalent issue in transport phenomena modeling. A novel, Python-based educational software platform called CDR-Solv was developed to demonstrate the effectiveness of ASGS stabilization across polynomial degrees ranging from linear to cubic approximations. Numerical experiments with minimal diffusion coefficients showed that numerical instabilities were successfully eliminated while maintaining solution accuracy across various source term configurations. The stabilization parameter, ${\tau }_K$, was instrumental in achieving computational stability without compromising mathematical rigor. Comparative analysis revealed the superior performance of higher-order approximations in capturing boundary layer phenomena and sharp gradient regions. The primary contribution of this study is the development of an open-source educational platform that provides access to advanced stabilization techniques and algorithmic transparency. The CDR-Solv framework also allows for the systematic exploration of the effects of selecting different polynomial degrees on solution quality in transport-dominated regimes. Full article

Operating systems such as Windows, Linux, and macOS include built-in commands that enable administrators to perform essential tasks. These same commands can be exploited by attackers for malicious purposes that may go undetected by traditional security solutions. This research identifies an unmitigated risk of misuse of a standard command to disconnect network services on victim devices. Thus, we developed a novel Proof-of-Concept (PoC) malware named DCmal-2025 and documented every step of its lifecycle, including the core idea of the malware, its development, impact, analysis, and possible countermeasures. The proposed DCmal-2025 malware can cause a Denial-of-Service (DoS) condition without exploiting any software vulnerabilities; instead, it misuses legitimate standard commands and manipulates the routing table to achieve this. We developed two types of DCmal-2025: one that triggers a DoS immediately and another that initiates it after a predefined delay before restoring connectivity. This study evaluated 72 antivirus detection rates of two malware types (DCmal-2025 Type 1 and Type 2) written in C and Rust using VirusTotal. The source code for both types was undetected by any of the antivirus engines. However, after compiling the source code into executable files, only some Windows executables were flagged by general keywords unrelated to DCmal-2024 behaviour; Linux executables remained undetected. Rust significantly reduced detection rates compared to C—from 7.04% to 1.39% for Type 1 and from 9.72% to 4.17% for Type 2. An educational institution was chosen as a case study. The institution’s network topology was simulated using the GNS3 simulator. The result of the case study reveals that both malware types could cause a successful DoS attack by disconnecting targeted devices from all network-based services. The findings underscore the need for enhanced detection methods and heightened awareness that unexplained network disconnections may be caused by undetected malware, such as DCmal-2025. Full article

Ehrlichiosis and anaplasmosis are endemic to tropical and subtropical regions and pose significant zoonotic threats to both human and animal health. This study aimed to detect anti-Ehrlichia canis, anti-Borrelia burgdorferi, and anti-Anaplasma antibodies in dogs from the rural–urban area of Huamanga, Ayacucho. The cross-sectional survey was conducted at the Facultad de Ciencias Biológicas of the Universidad Nacional de San Cristóbal de Huamanga between May and August 2023. Samples were collected via venipuncture, and antibody detection was performed using the immunochromatographic assay Anigen Rapid CaniV-4 kit. Frequencies, percentages, and statistical analyses were conducted using the SPSS^® software package. A total of 107 samples from dogs in the Covadonga Human Settlement were analyzed, comprising 64 (59.8%) males and 43 (40.2%) females. The majority (78.5%) were from mixed-breed dogs, while other dogs breed included Schnauzers, Pekingese, and Pitbulls. Thirty positive samples were identified, with antibodies against Ehrlichia canis (15.9%), Anaplasma phagocytophilum/Anaplasma platys (3.7%), mixed infections of Ehrlichia canis and Anaplasma phagocytophilum/Anaplasma platys (6.5%), and Ehrlichia canis/Borrelia burgdorferi (1.9%) detected, as well as an association between vector exposure and the presence of Ehrlichia canis antibodies. These findings underscore the urgent need for the implementation of integrated control strategies and enhanced surveillance programs targeting tick-borne diseases in high-risk areas, along with targeted educational campaigns to promote responsible pet ownership and preventive measures. Full article

Background/Objectives: Breastfeeding is essential to maternal and child health, and multiple factors influence its success. This study examined the factors associated with breastfeeding type among infants aged 0 to 12 weeks. Methods: A mixed-methods study, employing a convergent design, was conducted in the rooming in unit of a hospital in Espírito Santo, Brazil. A total of 296 mothers of neonates ≥ 34 weeks participated in both the quantitative and qualitative phases. The qualitative phase involved semi-structured interviews conducted in the hospital setting. In the quantitative phase, data were collected via telephone in three waves (on days 14, 40, and 90 postpartum), critical moments for establishing and maintaining breastfeeding, analyzing sociodemographic factors (age, education, marital status, number of pregnancies), clinical factors (gestational age, mode of delivery, milk production) and support factors (social and hospital). Descriptive statistical analysis and binomial and multinomial logistic regression models were used, conducted in R 4.3.3 software. The qualitative and quantitative findings were integrated through simultaneous incorporation and presented in a joint display. Results: The analysis showed that although most mothers had high adherence to prenatal care, breastfeeding counseling was insufficient. In addition to the type of delivery and immediate skin-to-skin contact, other factors were also found to be relevant to maintaining exclusive breastfeeding. Higher maternal education and a greater number of pregnancies were associated with better breastfeeding practices, albeit with variations in statistical significance. Support received during hospitalization, especially from the healthcare team, also emerged as a central element in the qualitative reports, reinforcing its role as a protective factor for continued breastfeeding. Early formula use within the first 48 h was identified as a barrier to initiating and maintaining breastfeeding. Conclusions: The duration and maintenance of exclusive breastfeeding varied over time, depending on factors such as the number of prenatal appointments, education level, number of pregnancies, mode of delivery, immediate skin-to-skin contact, and, most importantly, the use of formula in the first 48 h. The early introduction of formula in maternity wards represented a significant obstacle to breastfeeding, reinforcing the importance of integrated public policies and multidisciplinary initiatives that promote breastfeeding from birth. Full article