Search Results (941)

This paper presents a detailed study of the $(3+1)$-dimensional Zakharov–Kuznetsov–Burgers equation to investigate shock-wave phenomena in dusty plasmas with quantum effects. The model provides significant physical insight into nonlinear dispersive and dissipative structures arising in charged-dust–ion environments, corresponding to both laboratory and astrophysical plasmas. We then perform a qualitative, numerically assisted dynamical analysis using bifurcation diagrams, multistability checks, return maps, Poincaré sections, and phase portraits. For both the unperturbed and a perturbed system, we identify chaotic, quasi-periodic, and periodic regimes from these numerical diagnostics; accordingly, our dynamical conclusions are qualitative. We also examine frequency-response and time-delay sensitivity, providing a qualitative classification of nonlinear behavior across a broad parameter range. After establishing the global dynamical picture, traveling-wave solutions are obtained using the Paul–Painlevé approach. These solutions represent shock and solitary structures in the plasma system, thereby bridging the analytical and dynamical perspectives. The significance of this study lies in combining a detailed dynamical framework with exact traveling-wave solutions, allowing a deeper understanding of nonlinear shock dynamics in quantum dusty plasmas. These results not only advance theoretical plasma modeling but also hold potential applications in plasma-based devices, wave propagation in optical fibers, and astrophysical plasma environments. Full article

Sustainability is a foundational principle in Chilean education, reflected in curricular objectives related to environmental care, economic development, and social well-being. This study analyzes the integration of sustainability concepts and dimensions into the curricular bases of the third year (11th grade) and fourth year (12th grade) in Chilean secondary education. Using a sequential explanatory mixed-methods design and content analysis, the quantitative phase identified six key sustainability-related terms and their presence across curricular components and subject areas. The qualitative phase examined the inclusion of the environmental, social, and economic dimensions within those areas. The results show that sustainability concepts appear in seven subject areas, with greater emphasis on learning objectives and educational purposes. However, the environmental dimension dominates, while the social and economic aspects are underrepresented. These findings reveal conceptual ambiguities and uneven integration, highlighting challenges for implementing a multidimensional sustainability approach in Chilean classrooms. Full article

This study proposes a comprehensive framework for establishing an Emissions Trading System (ETS) in Thailand, addressing three core design elements: scope, cap setting, and allowance allocation. Using a mixed-methods approach that combines quantitative data analysis with qualitative insights from expert and stakeholder consultations, the research identifies a practical and strategic pathway for implementation. The proposed framework recommends a phased approach, with the initial phase covering 222 high-emitting facilities across seven key sub-industrial sectors. This scope, defined by a 25,000 tCO₂e threshold, is estimated to cover approximately 42.64% of the country’s total greenhouse gas (GHG) emissions. The ETS cap for the first phase is set at 20 MtCO₂e, aligning with national climate targets outlined in Thailand’s draft NDC 3.0. For allowance allocation, free allocation via output-based benchmarking is identified as the most suitable method for initial implementation, given its feasibility and effectiveness in incentivizing efficiency improvements. Furthermore, the standard cost model (SCM) was applied to assess compliance costs, indicating an annual administrative burden of 21,534 h and THB 42.18 million. These insights provide policymakers with a baseline for streamlining monitoring, reporting, and verification (MRV) requirements. The findings suggest that the proposed framework is a robust and strategic model, tailored to the unique economic and regulatory context of Thailand, providing a clear path to achieving the nation’s ambitious sustainable climate goals. Full article

Families in rural communities face a constellation of challenges that significantly hinder their ability to support adolescents. Our study aimed to explore family functioning as a protective factor for adolescent mental health from the perspective of parents in rural communities of southern Ecuador, using Photovoice as a participatory research tool. The research design corresponds to Participatory Action Research. Five Focus Group Discussions (FGDs) were conducted. A total of 29 parents of adolescents participated in the study. The research team employed qualitative content analysis for the interpretation phase. Through photographs and focus groups, parents commented on aspects of family life that they perceived as necessary for supporting adolescents, such as effective communication, cohesion, supervision, and expressions of care. The main conclusion indicated that the implementation of Photovoice converted participants from subjects to collaborators, allowing them to critically reflect on their behaviors while aiding or reinforcing in the co-creation of strategies. Full article

Background/Objectives: It is known that assisted human reproduction in infertility causes psychological and mental instability in those undergoing this treatment. Patient satisfaction, personal experiences with assisted reproduction treatment (IVF) and self-perception of emotional distress require a comprehensive study using complete and scientifically validated instruments. The aim of this study was to develop and validate a scale enabling nurses to assess patient satisfaction with the care they receive, personal satisfaction with the assisted reproduction treatment process, and self-perceptions of emotional discomfort. Methods: This study employed a mixed research strategy. Initially, a systematic literature review informed the qualitative phase, which involved expert focus groups in formulating the questionnaire items. Subsequently, the developed scale underwent psychometric analysis in the quantitative phase and was given to women undergoing fertility treatment. Results: The scale was found to have an acceptable level of factorial validity and reliability. The items were consistent and homogeneous, with high saturation in their respective factors (3). A negative covariance was observed between factors 1 and 2, and between factors 2 and 3, along with a positive covariance between factors 1 and 3. Furthermore, it was found that satisfaction with nursing care (F1) was associated with a lower need for professional psychological help and that a greater perception of emotional well-being (F2) was associated with a greater need for this type of help (F1: β = −0.07, p = 0.002; F2: β = 0.10, p = 0.004). Conclusions: This scale is a robust and dependable instrument, demonstrating its validity and reliability. Most notable are its user-friendly nature, ease of administration, and minimal time needed. Moreover, the scale proves effective in identifying women who require professional psychological support, which is a critical distinction with significant implications for patient care. In practical terms, the scale equips nurses with a powerful tool for conducting a thorough and efficient assessment of women undergoing fertility treatment. Full article

This paper presents a phase-based analysis of the spatial and architectural development of underground stations in the Warsaw Metro, focusing on 28 non-transfer stations constructed between 1983 and 2019. The research examines how design and functional solutions evolved over five construction phases in response to changing engineering methods, organizational frameworks, and urban contexts. A comparative analytical framework was developed, incorporating quantitative and qualitative parameters related to spatial layout, access schemes, and interior design features. The methodology combines archival documentation analysis, in situ field surveys, and typological classification. Findings reveal a clear trajectory from utilitarian, dual-purpose stations emphasizing structural durability and civil defense, toward more user-oriented designs prioritizing accessibility and intuitive navigation. Later phases show an expansion of multifunctional elements, including retail spaces, reflecting contemporary trends in metro station design. It contributes to a broader understanding of how adaptive design strategies enable metro infrastructure to respond to evolving urban needs and challenges, highlighting the importance of contextual integration for future metro developments. Full article

The Passifloraceae family is one of the most representative in tropical America, with food, pharmaceutical, and ornamental importance. This study evaluated seed morphometry and germination of eight accessions of four Passiflora edible species, P. edulis; P. ligularis; P. quadrangularis; and P. tripartita var. mollissima, by studying accessions conserved several years in the gene bank (−15 °C) and recently collected accessions. Four experimental phases were carried out as follows: (1) morphometric characterization of seeds with qualitative and quantitative variables; (2) evaluation of germination under two thermal regimes (20 °C/30 °C and 25 °C); (3) application of six pre-germination treatments to overcome dormancy; and (4) tetrazolium tests. In phase 1, P. quadrangularis stood out for its unique morphological characteristics according to multivariate analysis. In phase 2, the alternating thermal regime (20 °C/30 °C) promoted the highest germination. In phase 3, the germination response was specific to each species: mechanical scarification in P. edulis (85.7%), KNO₃ (0.5%) in P. ligularis (35.7%), control in P. quadrangularis (71.1%), and gibberellic acid (GA₃ 400 ppm) in P. tripartita (71.4%). The tetrazolium phase 4 identified the viability status of the seeds. It is concluded that the differences in morphometry and germination reflect the intrinsic characteristics of each species, highlighting the importance of specific protocols for their germination. This study provides tools to optimize the conservation and regeneration of Passiflora spp. germplasm under ex situ conditions, as a genetic base to be utilized in the future. Full article

Background: Breast cancer is the most common female cancer in Italy. Despite better survival rates, significant disparities in access to diagnosis, treatment, and follow-up persist across regions. We propose an integrated, multidisciplinary care model—the Breast Immunology Network (BIN)—to address these challenges. Methods: The model was developed through a two-phase expert consultation with key opinion leaders and stakeholders, aligned with national and European oncology guidelines. No new patient data were collected; this is a qualitative analysis based on expert consensus and existing literature. The proposed model integrates a Hub-and-Spoke cancer network structure with fully functioning multidisciplinary teams (MDTs), standardized care pathways (PDTA), and digital tools to ensure continuity of care. Results: Experts identified critical gaps in Italy’s breast cancer care: limited access to specialized centers, inconsistent adherence to screening programs, and delays in treatment initiation. The proposed BIN model aims to bridge these gaps by enhancing collaboration across all care levels, incorporating immunotherapy where appropriate, and defining key performance indicators (KPIs) for continuous quality evaluation. For example, quantitative targets include achieving ≥65% nationwide mammography screening adherence and ensuring ≥90% of patients are treated in certified Breast Units. Conclusions: The Breast Immunology Network offers a strategic framework to improve equity, quality, and timeliness of breast cancer care in Italy. Importantly, unlike existing Hub–Spoke or CCCN models, the BIN formalizes governance tools, harmonized eligibility criteria, and a national registry for immunotherapy. By uniting Breast Units and community services under shared governance, and by integrating innovations such as immunotherapy and telemedicine, the BIN model could significantly improve clinical outcomes and ensure more equitable care for all patients. Its implementation may serve as a reference model for other health systems seeking to optimize oncology pathways through multidisciplinary integration and advanced treatments. Full article

This study investigates urban–remote disparities in the science performance of Taiwanese eighth-grade students, particularly in matter-related domains, using an explanatory–sequential mixed-methods design. For the quantitative phase, we applied differential item functioning (DIF) analysis with Mantel–Haenszel statistics and logistic regression to the TIMSS 2019 science assessment, while in the qualitative phase, we employed think-aloud interviews and the repertory grid technique (RGT) with 12 students (6 urban, 6 remote) to explore cognitive structures. The quantitative phase identified 26 items (12.3% of 211) disadvantaging remote students, with DIF most pronounced in constructed-response formats and matter-related domains: “Composition of Matter”, “Physical States and Changes in Matter”, and “Properties of Matter”. The follow-up qualitative analyses revealed fragmented, associative cognitive structures in remote learners, marked by reliance on observable (macroscopic) properties rather than microscopic explanations, terminological confusion, microscopic gaps, and misconceptions, contrasting with urban students’ hierarchical integration. Triangulation suggests that the observed disparities are linked to experiential constraints, potentially accounted for by hindered micro–macro connections. Our findings suggest that resource inequities may play a role in sustaining certain biases, indicating that targeted measures could help to make science education more inclusive. Based on these results, we tentatively outline possible educational interventions to improve equity in science education. Full article

In developing countries, adolescent girls and young women (AGYW) continue to experience high rates of unintended pregnancy and sexually transmitted infections (STIs), including Human Immunodeficiency Virus (HIV). Several healthcare services are available at the primary level of healthcare to address the sexual and reproductive needs of adolescents in South Africa. Healthcare providers often face challenges such as limited resources, inadequate funds, and inadequate training, which hinder their ability to provide integrated care. Furthermore, cultural stigma and a lack of privacy prevent adolescents from seeking care. In response to increasing international calls for developing and implementing integrated person-centered care, which addresses both quality and access to care, this paper aims to develop and validate an integrated HIV/STI, and pregnancy prevention program for adolescent girls and young women in the Vhembe District of Limpopo. Multiphase mixed methods were employed in this study. This study consisted of three interconnected phases. As part of phase 1 of this study, a comprehensive literature review was conducted. In phase 2, an empirical study conducted using a concurrent triangulation strategy to collect and analyze both qualitative and quantitative data as a form of confirmation, dis-confirmation, cross-validation or corroboration of the findings. Consequently, a conceptual framework was developed using qualitative and quantitative analysis by merging, comparing, and interpreting the results. The findings of phase 2 interface were analyzed using the Political, Environmental, Social, and Technological (PEST) and Strength, Weakness, Opportunity, and Threat (SWOT) analyses. Additionally, the outcomes of the Logical Framework Analyses (LFA) informed the development of an integrated programme aimed at preventing HIV, STIs, and teenage pregnancy. Several stakeholders and experts (n = 35) were consulted as part of the Reduce the Risk (RTR) Coalition to validate the proposed integrated programme with an average of 94.3% on acceptability, feasibility, and appropriateness. In the Vhembe District of Limpopo province, there has been no published study that has developed an integrated HIV, STIs, and pregnancy prevention programme to improve the sexual health outcomes of adolescent girls and young women. Full article

Background: Customer churn significantly impacts business revenues. Machine Learning (ML) and Deep Learning (DL) methods are increasingly adopted to predict churn, yet a systematic synthesis of recent advancements is lacking. Objectives: This systematic review evaluates ML and DL approaches for churn prediction, identifying trends, challenges, and research gaps from 2020 to 2024. Data Sources: Six databases (Springer, IEEE, Elsevier, MDPI, ACM, Wiley) were searched via Lens.org for studies published between January 2020 and December 2024. Study Eligibility Criteria: Peer-reviewed original studies applying ML/DL techniques for churn prediction were included. Reviews, preprints, and non-peer-reviewed works were excluded. Methods: Screening followed PRISMA 2020 guidelines. A two-phase strategy identified 240 studies for bibliometric analysis and 61 for detailed qualitative synthesis. Results: Ensemble methods (e.g., XGBoost, LightGBM) remain dominant in ML, while DL approaches (e.g., LSTM, CNN) are increasingly applied to complex data. Challenges include class imbalance, interpretability, concept drift, and limited use of profit-oriented metrics. Explainable AI and adaptive learning show potential but limited real-world adoption. Limitations: No formal risk of bias or certainty assessments were conducted. Study heterogeneity prevented meta-analysis. Conclusions: ML and DL methods have matured as key tools for churn prediction, yet gaps remain in interpretability, real-world deployment, and business-aligned evaluation. Systematic Review Registration: Registered retrospectively in OSF. Full article

This paper focuses on a comprehensive historical analysis of Colombia’s war and peace trajectory from 1964 to 2023. We use a resilience thinking approach and the adaptive cycle conceptualization of change to analyze this trajectory, based on qualitative and quantitative information on violence, political and social interaction processes, and deforestation, including a statistical analysis of actor dynamics to identify nonlinear phase transitions. As a result, we propose a new narrative: namely, that war is the regular regime, and peace is the collapse of this regime, initiating a process of reorganization and regrowth. This narrative holds for the period between 1964 and 2000, but in the early 2000s, the system was transformed. Actors and their interactions have changed, and a new system has emerged. Secondly, we observe that the increase in violence between 1995 and 2001 coincided with a clear national trend of rising deforestation. However, since 2002, deforestation has remained high while violence has declined, challenging simple causal assumptions. These findings caution against interpreting deforestation dynamics solely through national-scale or post-agreement perspectives. Our results show that peace in Colombia has been fragile and partial, and instead of marking a definitive transition, the post-agreement period reveals a reconfiguration of armed conflict. This complexity underscores the need for future research that considers regional patterns and actor-specific dynamics in forest governance during conflict transitions. Full article

Background/Objectives: This study examines the development of clinical trials investigating psilocybin for the treatment of psychopathologies, with a comparative focus on the United States (US) and the European Union (EU). The objective is to identify regional differences in trial progression, research infrastructure, and regulatory frameworks. Methods: A mixed-methods approach was applied, combining case studies, qualitative and quantitative research. Key variables included trial phase, geographical distribution, demographic factors, funding, governmental support, and public health policies. Results: The US demonstrated a substantially higher number of psilocybin trials across both early and advanced phases. This reflects a strong research infrastructure, growing financial investment, and increasing interest in psychedelic-assisted therapies. In contrast, the EU showed fewer trials and slower advancement, reflecting a more cautious stance that emphasizes patient safety and therapeutic efficacy. These divergences are shaped by differences in regulation, funding mechanisms, and sociocultural attitudes toward psychedelics in psychiatry. Conclusion: This comparative analysis highlights the uneven pace of psilocybin research across different regions. It also emphasizes the importance of international collaboration, harmonization of public health policies, and the development of standardized procedures prioritizing safety and effectiveness. Integrating psilocybin-assisted interventions into psychiatric practice has the potential to expand treatment options and strengthen mental health care, but coordinated global efforts are essential to ensure both scientific rigor and patient protection. Full article

Boreal birch forests, dominated by Betula pendula and Betula pubescens, are significant components of Northern European and North American landscapes. These forests play a vital role in climate change mitigation by sequestering carbon and enhancing ecosystem resilience. This study aims to evaluate global scientific research trends concerning the management of boreal birch forests, with an emphasis on climate adaptation. We conducted a two-phase study: first, a bibliometric analysis of 287 peer-reviewed publications from 1978 to 2024 sourced from the Web of Science and Scopus databases; and second, a qualitative literature review based on refined selection criteria guided by the PRISMA framework. The analysis revealed that most research originates from Finland, Canada, Sweden, and the USA. Our findings were categorized into four thematic areas: management issues, abiotic and biotic drivers of forest dynamics, climate adaptation strategies, and current management practices. Furthermore, the results indicate an increasing research focus on climate-smart silviculture, biodiversity-oriented thinning, and mixed-species forestry. The review highlights significant management challenges and identifies knowledge gaps, particularly in genetic diversity, soil biota, and socio-economic dimensions. We conclude that adaptive, multifunctional management of boreal birch forests is essential for sustaining their ecological and economic roles in a changing climate. 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