Search Results (2,142)

Background: Public perception of environmental (natural background) radiation represents an important challenge for public health communication, as risk perception is often influenced more by information quality and institutional trust than by objective exposure levels. Methods: A cross-sectional survey was conducted among 481 respondents using a structured questionnaire assessing self-perceived knowledge, information sources, perceived radiation risk, institutional trust, and health-related attitudes. Results: Significant gender differences were observed in self-reported knowledge about radioactivity, with men more frequently reporting higher knowledge levels than women (p < 0.001), while no significant differences emerged between urban and rural respondents; logistic regression analysis showed that lower perceived risk was associated with lack of medical information (OR = 0.32, 95% CI: 0.14–0.71) and absence of avoidance behavior (OR = 0.23, 95% CI: 0.11–0.47), whereas low trust in medical institutions was associated with higher odds of perceiving natural background radiation as dangerous (OR = 1.84, 95% CI: 1.21–2.80). Conclusions: Effective radiation risk communication requires more than the dissemination of information; it must also address public concerns, enhance institutional trust, and provide clear, credible, and accessible health-related messages. Tailored communication strategies are essential to bridge the gap between expert knowledge and public perception. Full article

Background/Objectives: Epidemiological studies over the first decades of the 21st century have reported a decrease in cardiovascular disease (CVD) morbidity and mortality. Changes in coronary care for acute myocardial infarction (AMI) over these years, including the COVID-19 pandemic period, have been less studied in Eastern and Central Europe. The study aimed to assess changes in coronary care—the time of medical assistance and treatment—for AMI patients over 2000–2023 in urban Kaunas residents aged 25–64. Methods: The data source was study cases from the Kaunas Ischemic Heart Disease Registry (Registry)—Kaunas city residents aged 25–64 years included in the Registry according to MONICA project protocol evaluation methodologies. Data were analyzed by sex and age group (25–54 and 55–64 years). Descriptive statistics (chi-square and z-score values) were used to evaluate the data; the significance level was p < 0.05. A logistic regression analysis was performed to assess the odds ratios of death within 28 days across six time periods. Results: The proportion of AMI patients hospitalized up to 2 h from the onset of pain accounted for about one-fifth of all hospitalized patients in 2000–2016, while in 2017–2023, it significantly decreased. In 2017–2023, compared with 2000–2004 and 2009–2016, significantly fewer men who developed AMI were hospitalized within the first 2 h of emergency presentation (p < 0.05). Over the whole study period, fewer women with AMI were hospitalized within the first 2 h of pain as compared to men (p < 0.05). There were no significant differences in time from pain onset to hospitalization between the age groups. At the same time, from 2009 to 2012, more young AMI patients were hospitalized within the first 2 h (p < 0.05). Percutaneous coronary angioplasty (PTCA) with stenting (PCI) increased 30 times from 2000–2004 to 2020–2023. PCI has been the most available treatment for men with AMI since 2009 and stayed stable from 2013 (66.0%) until 2023 (72.1%). Women with AMI tended to get less PCI, PTCA, and coronary artery bypass grafting (CABG) than men. The pre-pandemic and COVID-19 periods did not differ in the proportions of reperfusion treatment methods used in both men and women. Thrombolysis was very rare, and since 2017, it has not been used in Kaunas because PCI has become more accessible. PCI (2000–2016) and CABG (2009–2016) were more prevalent among the 25–54-year-old AMI patients (p < 0.05). From 2017 to 2023, there were no differences between age groups in the reperfusion procedures used, nor were there differences in treatment between these groups during the pre-pandemic (2017–2019) and peri-COVID-19 pandemic (2020–2023) periods. Conclusions: In Kaunas, the treatment of patients with AMI has improved significantly over the past 20 years. The use of PCI has increased greatly, and the rate of CABG surgery stayed stable, while only every fifth patient has been admitted to the hospital in a timely manner. Men were more likely to receive PCI, and older patients were more likely to undergo CABG. Compared to the period of 2000–2004, the chance of dying within 28 days after AMI was significantly lower in 2017. Full article

Ports are drivers of economic development, but at the same time, they create significant environmental pressures for port cities. Sustainable port development is an important aspect of urban and logistical planning in European coastal cities, helping to improve local air quality, the quality of life in port cities, and impact sustainable economic development. This research aims to analyze the relationship between investments in sustainable practices implemented in ports and air quality in port cities, based on a sample of five European ports observed from 2013 to 2024. The Fixed Effects (FE) estimation model was used as the estimation technique. The results indicate that higher investments in sustainable practices are associated with lower NO₂ concentrations in port cities. This highlights the significance of sustainable investments in improving air quality in port cities while advancing urban sustainability and contributing to economic development. This paper contributes to understanding the role of ports as an important link in the urban energy transition and provides guidelines for further integration of environmental policies into port and city planning. Full article

Taking emergency logistics scenarios under urban public emergencies as the research background, this paper analyzes the current research status and existing problems of distribution center location methods. It constructs an emergency logistics distribution center location model based on ISG-IAGNES clustering and a symmetrical IDFS spatial decision tree algorithm. Firstly, the ISG spatial model is constructed to divide urban geographic space into cellular units and then topologically generate the cellular space. Secondly, the IAGNES algorithm is established to achieve cellular space clustering, realizing the dimensionality reduction operation of the urban emergency space. Thirdly, the symmetrical characteristic of the pathway is taken as the core condition to construct the DFS algorithm to build the graph global searching model, and then the logistics distribution center location model based on the symmetrical IDFS spatial decision tree algorithm is constructed. The experiment proves that the optimization rate of the distribution center selected by the proposed algorithm in terms of route distance cost and time cost is 9.82% compared to the centroid method and analytic hierarchy process, 14.41% compared to the Dijkstra algorithm, and 17.21% compared to the Prim algorithm. It proves that the proposed algorithm has advantages over traditional algorithms in reducing the distance cost and time cost of logistics routes. Full article

While drones play important roles in areas such as communication and logistics delivery, they have certain limitations in emergency rescue scenarios due to their inability to carry passengers. Building on mature drone technologies such as autonomous flight and environmental perception, unmanned passenger Electric Vertical Take-off and Landing (eVTOL) aircraft are designed with a manned cabin, enabling them to operate without an onboard pilot while rapidly transporting injured people. Consequently, eVTOLs can play a significant role in emergency rescue that cargo-only drones cannot fulfill, as they are capable of rapidly reaching emergency scenes, effectively overcoming the delays caused by traditional ground traffic congestion. Despite their potential, eVTOLs still face several critical obstacles, including signal disruption, limited coverage of dispatching centers, mutual authentication among entities, and concerns related to security and privacy preservation. As a remedy, this paper presents a lightweight authentication protocol leveraging drone assistance to overcome these challenges for unmanned eVTOL emergency rescue. In scenarios where an unmanned eVTOL experiences signal blockage due to dense urban high-rise structures, neighboring drones can serve as a transmission relay to assist the unmanned eVTOL and the dispatch center (DC) in completing mutual authentication and session key negotiation, thereby enabling the unmanned eVTOL to safely complete its mission. To enhance security, physical unclonable functions (PUFs) are integrated into unmanned eVTOLs, drones, and the DC, safeguarding sensitive data against side-channel and physical capture attacks while preserving the confidentiality of unmanned eVTOL identities to mitigate privacy risks. Our protocol achieves provable security in the random oracle model while exhibiting strong resistance to various well-known attacks. Comparative analysis with the existing drone authentication and drone-assisted emergency rescue authentication protocols reveals that our protocol not only provides stronger security guarantees but also maintains a low computational overhead. Full article

Background: Hypertension is being increasingly observed among young adults in urban India, alongside rapid dietary transitions and rising consumption of ultra-processed foods (UPFs). The current study aimed to assess the frequency and patterns of UPF consumption and examine their association with high blood pressure among urban college students. Methods: A cross-sectional study was conducted among 311 undergraduate students aged 18–24 years from three colleges in Hyderabad, India. Our study used a validated automated device to measure blood pressure. Dietary intake over the previous month was assessed using a 24-item food frequency questionnaire capturing commonly consumed UPFs. After adjusting for age, sex, and socioeconomic variables, multivariable logistic regression was performed to assess the relationships between UPF consumption categories and high blood pressure. Ninety-five percent confidence intervals (CIs) for adjusted odds ratios (AORs) were reported. Results: Overall, 12.5% of participants had high BP (≥140/90 mmHg). The prevalence was higher among males and those aged >20 years. In the adjusted analyses, males had significantly higher odds of having high BP (AOR: 4.96; 95% CI: 1.64–15.01), as did students from higher-income households (AOR: 3.22; 95% CI: 1.07–9.66). Consumption of high-fat and/or high-salt UPFs at or above the median was independently associated with high BP (AOR: 2.85; 95% CI: 1.16–6.99). Taste, availability, and low cost were common drivers of UPF intake. Conclusions: Higher consumption of high-fat and/or high-salt ultra-processed foods was associated with higher odds of elevated blood pressure among urban young adults. These findings warrant further longitudinal investigation and may help inform the development of targeted dietary awareness and food environment interventions in college settings. Full article

Across Latin America, numerous traditional agroecological systems face increasing challenges in integrating into formal markets. This issue is also evident in the Chakra Kichwa, an ancestral agroecological production system primarily managed by Indigenous women. Despite its cultural, environmental, and nutritional significance, its integration into the formal market is hindered by structural limitations that keep producers in conditions of subsistence and marginalization. This study analyzes the economic benefits derived from the commercialization of agricultural products by 642 producers, intermediaries, and vendors who belong to 20 associations based in the rural parishes of Tena canton (Napo Province) and who market their products in urban areas. A total of 234 surveys were conducted, with a 95% confidence level and a 5.2% margin of error. Findings indicate that the sale of Chakra products generates an average monthly net income of $211.06, provided the value of family labor is not accounted for. However, when imputing the monthly cost of this unpaid labor, the system shows losses of $409.48. Additionally, four scenarios are simulated: the first three assess the profitability of the commercial circuit under alternative transportation logistics; the fourth explores potential gains from increased selling prices associated with improvements in infrastructure, inputs, and transportation. In all cases, sales labor is replaced with hired personnel. The results indicate that these scenarios could increase net income by between 28.45% and 92.23%. Nevertheless, when accounting for family labor costs, all scenarios continue to reflect losses. Consequently, the model indicates that achieving economic breakeven would require quadrupling the current productivity of the Chakra system. Full article

The automotive industry in Mexico faces significant logistical challenges in optimizing distribution routes, particularly in border regions, where traffic variability directly affects operational performance. This study proposes a multiperiod route optimization approach for a Tier 1 automotive supplier by applying the Floyd–Warshall algorithm to a cross-border transportation network. Distance matrices are constructed for multiple time windows to capture traffic-related variations in route efficiency. The algorithm is applied independently to each scenario, enabling the identification of time-dependent optimal routes and the development of alternative routing strategies. The results show that optimal routes vary across different periods of the day, leading to measurable improvements in routing efficiency and enhanced decision-making flexibility. The proposed approach supports more realistic logistics planning in congested urban environments and improves operational performance in cross-border automotive supply chains. Full article

This study proposes and tests an analytical framework for interpreting digitally monitored municipal biowaste collection services through comparable diagnostics of operational performance, additional effort, and emissions intensity. The framework was applied to 572 collection services recorded between July and December 2025 in the Municipality of Barreiro, Portugal, covering seven circuits operating under different urban morphologies and collection configurations. Service-level operational records were transformed into physically interpretable performance indicators and an additional operational effort index was derived from robust normalization of serviced container density and service time per kilometer. The results showed marked heterogeneity across service regimes, with the highest effort observed in residential circuits characterized by greater spatial and temporal demand, while the non-domestic and communal circuits remained at or below municipal reference conditions. At the municipal scale, operational effort was moderately associated with mass collected per kilometer (ρ = 0.490, n = 572), weakly and non-significantly associated with mass per hour (ρ = 0.075, p = 0.074), and negatively associated with mass per container (ρ = −0.325). For services operating above municipal reference conditions (Eesf > 0, n = 286), emissions intensity was negatively associated with both effort components and with the aggregate effort index, with the strongest association observed for Eesf (ρ = −0.554). The results indicate that higher operational effort tends to coincide with greater spatial mass recovery, but not with higher container-level yield or proportionate improvements in emissions performance. More broadly, the study shows that the analytical value of digital monitoring depends not only on data availability, but also on the ability to convert routine service records into interpretable diagnostics for municipal decision-making. Full article

In complex hydrogeological systems, such as multilayered aquifers in densely urbanized coastal areas, multi-parametric, multi-depth networks are required for discriminating between anthropogenic and natural signals. This study presents an evaluation protocol of a pre-existing piezometric network, composed of 66 piezometers, aimed at implementing a near real-time (NRTM) hydrogeochemical monitoring system in the Strait of Messina (Sicily, Italy) area. A rigorous selection process was conducted to determine the suitability of these sites for hosting permanent, above-ground instrumentation. After excluding 55 sites for logistical and administrative reasons, the remaining piezometers were evaluated through a multi-step protocol. Video inspections and vertical logs of temperature and electric conductivity were carried out to identify pipe integrity and screened sections. Water samples were collected, for the execution of geochemical and isotopic analyses, to distinguish between groundwater bodies and stagnant water or local infiltration. Finally, preliminary near real-time monitoring of water level and temperature assessed the response of the sites to hydrological cycles and tidal effects. A scoring system was applied to rank the sites, resulting in a priority list for the installation of the permanent monitoring network. The evaluation protocol was tested in the Strait of Messina, but it is based on a generical approach, independent of the specific setting of a study area, making it suitable for general applications worldwide. Full article

The housing crisis in rapidly transforming earthquake zones represents the exhaustion of conventional construction paradigms. Unlike single-focused analyses, this study compares conventional reinforced concrete and modular steel systems from a holistic lifecycle perspective, using Turkey as a strategic laboratory for urban transformation. Employing qualitative content analysis, it maps in-depth interviews with 14 sector experts onto a ‘Dialectical Life Cycle Matrix’ via frequency-based consensus indicators. Expert assessments indicate that conventional methods face a structural bottleneck driven by architectural uniformity, labour-related weaknesses, rising costs, and prolonged durations, triggering seismic vulnerability, compromised living quality, and non-circular end-of-life outcomes. Modular systems counter this through factory-controlled rapid production, QA/QC mechanisms, and economies of scale, integrating guaranteed safety and the robust option of steel with R&D-driven human comfort. However, transitioning requires relinquishing deep-rooted advantages—financial flexibility, established order, regulatory comfort, cultural perception, and morphological harmony—introducing local trade-offs: high initial investment, geometric plot and logistical constraints, cultural barriers, and design concerns. Consequently, universal technologies cannot be directly transferred. To overcome Turkey’s local barriers, this study proposes a three-stage transition model: (I) civil and public-led legislative and workforce reforms; (II) financial innovation and gradual hybrid adaptation; and (III) industrial maturation transforming housing into a continuously updated living product. Full article

Unmanned aerial vehicles (UAVs) serve as both communication relays and aerial couriers in modern urban logistics networks. Conventional trajectory optimization methods assume perfect localization and isotropic free-space tracking signal propagation, which limits their effectiveness in urban canyons. To address the positional uncertainty and signal blockage from buildings, we propose a digital twin-driven framework for continuous trajectory and resource optimization in UAV swarms. We model an urban environment containing random high-rise structures, applying a non-line-of-sight (NLoS) uncertainty to reflect realistic communication degradation. The digital twin (DT) architecture utilizes a dual-layer spatial representation that captures a dynamically decaying positional uncertainty radius of the recipient. We define a strict visual localization boundary that initiates deterministic target tracking with a state transition mechanism. To manage the complexity of swarm routing, we apply Density-Based Spatial Clustering of Applications with Noise (DBSCAN), assigning one UAV courier and one logistics transfer station to each cluster. The system executes a continuous re-optimization loop using an adaptive multi-objective Genetic Algorithm. This framework jointly minimizes cumulative outage probability and total flight time while enforcing a signal-to-noise ratio threshold and throughput constraints. This continuous adaptation mechanism mitigates NLoS blockage risks, supporting reliable communication and efficient delivery in Global Navigation Satellite System (GNSS)-degraded and obstacle-dense urban environments. Full article

(1) Pholidoptera griseoaptera (De Geer, 1773) (Orthoptera, Tettigoniidae) is a common and widespread inhabitant of forest edges in Europe and may therefore serve as a suitable model species for understanding past and future changes in forest wildlife. (2) We recorded the presence or absence of the species in 189 forest and forest-edge plots within the Kaluga Region using acoustic observations and pitfall trapping, and analysed the data using logistic regression. (3) Across the region, the main positive factor affecting species presence was the dominance of nemoral herbs in the herb layer. The main negative factors were habitat isolation caused by physical barriers and location within moraine plains formed during the late stage of the Moscow glaciation. The presence of coniferous tree species and spatial autocovariation were also significant factors, although their contributions were relatively small. The abundance of Ph. griseoaptera was higher in forests located within river valleys. Within Kaluga, the long-term persistence of tree vegetation and habitat isolation were the main significant factors affecting species occurrence. The smallest urban habitat occupied by the species covered approximately 13 ha, whereas the total area of unmown patches within this habitat was only about 0.2 ha. (4) Ph. griseoaptera may be used as an indicator of the long-term persistence of broadleaved deciduous (nemoral) forests. Under conditions of high urbanization, however, the species may become threatened. Full article

The rapid accumulation of Waste Electrical and Electronic Equipment (WEEE) presents severe environmental and resource challenges in high-density metropolises. Traditional reverse logistics (RL) network designs often overlook urban morphological constraints and treat recovery rates as static parameters. To address these gaps, this study proposes a GIS-integrated low-carbon WEEE RL framework. A Spatial Multi-Criteria Decision Analysis (MCDA) workflow first deduces optimal facility layouts avoiding ecological exclusion zones. Subsequently, a Fuzzy Mixed-Integer Linear Programming (FMILP) model endogenizes the dynamic recovery rate and enforces discrete vehicle dispatching, solved via an advanced Geospatially Constrained Multiple-Priority Genetic Algorithm (MPGA). Validated in Jinan, China, the framework consistently outperforms contemporary benchmarks. Crucially, it reveals that traditional continuous models underestimate urban carbon footprints by 34.6%. By adopting the optimal spatial compromise, policymakers can achieve a 19.9% carbon reduction at a marginal 12.7% profit sacrifice, effectively harmonizing decarbonization with commercial viability. Full article

Introduction: The increasing use of traditional contraceptive methods in Indonesia may raise the risk of unintended pregnancies, while modern contraceptive use has stagnated and often experiences discontinuation. Nevertheless, contraceptive choice is an individual right and should guide family planning programs. This study aimed to estimate contraceptive effectiveness based on pregnancy risk and dropout rates and to examine the socio-demographic characteristics of users. Methods: This cross-sectional study with a retrospective cohort approach used calendar data from the 2017 Indonesia Demographic and Health Survey (IDHS). The study population included all contraceptive use episodes within five years, resulting in 46,461 episodes. Data were obtained from the 2017 IDHS socio-demographic questionnaire and contraceptive calendar. Multivariate logistic regression was used for analysis. Results: There was no significant difference in dropout rates between traditional and modern contraceptive users (OR = 0.92; 95% CI = 0.79–1.05). However, users of traditional methods had a 2.46-times higher risk of pregnancy compared with modern method users (95% CI = 2.19–2.76). Traditional contraceptive use was more common among women aged 40–49 years, with parity ≥ 5, higher education, and higher economic status, living in urban areas, and residing in Sumatra, Kalimantan, and Sulawesi (p = 0.001). Conclusions: Traditional contraceptive use is associated with a higher risk of pregnancy. Strengthening counseling services through comprehensive, pluralistic, and participatory approaches is essential while respecting individuals’ rights in contraceptive choice. Full article