Search Results (322)

Conservation subdivisions cluster residences in smaller lots compared to conventional subdivisions in order to protect common open spaces (COS) with the assumption that clustering and open space preservation will provide increased ecosystem services. However, the guidelines and regulations for conservation subdivisions typically lack direction on how COS should be designed and maintained. The primary objective of our study was to examine the landscape structure of COS across 54 conservation subdivisions developed in Waukesha County, Wisconsin, USA, and our secondary objective was to evaluate whether COS landscape structure is associated with bird occurrence. We selected seven FRAGSTATS landscape metrics relevant for assessing biophysical processes in urbanized areas in the categories of area/size (PLAND, MPS, LPI), edge/shape (ED, PD), and fragmentation/isolation/aggregation (LSI, IJI). Our k-means clustering and non-metric multidimensional scaling analysis found that the landscape structure of COS varies across the conservation subdivisions and that there are three distinct categories of COS (i.e., intact large-patch COS, fragmented medium-patch COS, and small, dispersed COS) in these subdivisions. Analysis of bird occurrences using eBird data did not show conclusive results but suggested that future systematic wildlife observation in the three groups of conservation subdivisions may provide evidence of the importance of COS composition and configuration, as COS landscape structure may influence ecosystem services. Full article

Urban streets are critical public spaces that support residents’ daily psychological recovery, and their landscape quality is directly related to pedestrians’ physical and mental well-being. In the rapid urbanization process, numerous urban streets have exhibited problems such as excessive building density, cluttered visual interfaces, a lack of natural elements, and an absence of regional characteristics, leading to a continuous decline in the psychological restorative capacity of street spaces and failure to meet residents’ demands for a healthy urban environment. Existing research mostly employs qualitative assessment methods to evaluate walking experiences and psychological restoration levels of street environments, lacking high-precision, pixel-level quantification of street landscape elements and rarely incorporating regional cultural elements into the analytical framework of restorative environments. This study takes Foshan, a famous historical and cultural city in China, as the research object, and selects five typical streets in the main urban area, including comprehensive streets, living streets, landscape streets, commercial streets, and historical–cultural streets, to construct a technical route of “data collection–element quantification–model construction–effect analysis.” Leveraging the pre-trained Mask2Former semantic segmentation model and pedestrian-perspective street-view images (SVIs), combined with field research, the study quantifies 22 street landscape elements across five dimensions: environment, transportation, social interaction, facilities, and culture. Through PCA principal component analysis and K-means clustering, 20 typical photos were objectively sampled, and public psychological evaluations were conducted using the Perceived Restorativeness Scale (PRS). A stepwise multiple linear regression model was then employed to construct an exploratory explanatory model for street psychological restoration, identifying key influencing factors and their effect intensities. The results indicate the following: (1) Environmental and cultural elements are the core characteristics associated with pedestrians’ psychological restoration, whereas transportation, social, and facility elements are correlated only with certain restoration dimensions and show no significant association with the overall psychological restoration level. (2) Among the 22 element indicators, the Green View Index showed the strongest positive association with psychological restoration (β = 0.681, p < 0.001); historical memory markers and the Blue View Index also exhibited significant positive associations. (3) By integrating the elements associated with pedestrians’ psychological restoration and their association strengths, an exploratory explanatory model of the psychological restoration benefits of urban street landscapes was constructed, with an adjusted coefficient of determination of 69.8%, accounting for 69.8% of the variation in street psychological restoration levels. The findings establish an exploratory analytical framework and furnish empirical evidence for healthy city planning and street renewal in similar historical and cultural cities. Full article

Background: Lower limb exoprostheses often lead to stump dermatological pathologies. The mechanisms by which mechanical microtraumas progress to non-healing ulcerative defects due to dysbiosis remain poorly understood. The objective of this study was to analyze mechanical, inflammatory, and infectious stump skin complications and justify the role of bacterial and mycological dysbiosis in blocking tissue regeneration. Methods: A critical narrative review guided by SANRA principles was conducted (PubMed/Scopus, 1980–2026). Data were extracted with a structured query focusing on amputation stumps, prosthetic interfaces, and skin/microbiological complications (dysbiosis, biofilms, and inflammatory markers). Evidence was graded using predefined clinical matrices and integrated through structured evidence collations to synthesize stump–prosthesis pathogenesis. The PRISMA method was not applied due to study heterogeneity. Results: Skin damage dynamics were categorized into three stages: adaptation (up to 12 months), chronic reactive changes (12–24 months), and late proliferative-infectious destruction (>24 months). The sealed liner space creates 100% humidity and alkalization (pH > 6.5). This causes a mycological shift, where resident Malassezia spp. lose dominance to invasive Candida albicans and non-dermatophyte molds (Aspergillus spp., Fusarium spp.). These pathogens form polymicrobial biofilms with Staphylococcus aureus. At the molecular level, delayed regeneration is driven by “frustrated phagocytosis”: macrophages, unable to engulf large fungal hyphae, continuously release reactive oxygen species and enzymes, trapping the wound in the inflammatory phase. Excessive matrix degradation and suppressed angiogenic factors further block epithelialization. Conclusions: The skin under a prosthesis socket forms a unique pathological biotope. Successful regeneration requires preventive mycobiota correction and targeted management of biophysical parameters (pH, humidity) within the “skin–liner” interface. Full article

Fine-scale site selection of urban parks serves as a core measure to guarantee spatial equity of public service spaces for residents and advance the sustainable development of urban ecological spaces. Among relevant tasks, balancing the supply and demand of green spaces stands out as an essential foundation for maintaining long-term stability of urban human well-being and ecosystems. Green-space supply is defined as the stock of various existing urban parks within the city, while green-space demand is quantified via grids generated based on residential communities in Changsha. Existing research on urban park site selection lacks a full-process coupled framework, fails to accommodate differentiated layout demands for multi-level parks, and struggles to reconcile the sustainable operation and long-term ecological empowerment of urban green-space systems. Taking the main urban area of Changsha as the research scope, this study divides the study area into grid units to analyze the spatial differentiation of green-space accessibility and identify service blind zones. The XGBoost model is adopted to predict areas suitable for green-space construction, and the NSGA-III algorithm is applied to realize collaborative multi-objective optimization covering service efficiency, ecological benefits, and land development costs. The results reveal that the 15-min walking coverage of community parks in central Changsha only reaches 57.29%. Respectively, 34.52% and 41.04% of residential communities record accessibility levels below the municipal average of urban parks and forest parks, with prominent shortages of green-space supply in peripheral urban areas. This study optimizes and screens twenty-eight candidate sites for community parks, twelve candidate sites for urban parks, and eight candidate sites for forest parks. The proposed scheme effectively narrows the gap in green-space accessibility across the whole city and coordinates ecological conservation with land development costs. Compared with research relying on a single model or two-stage coupling frameworks, this paper constructs a systematic workflow spanning supply–demand status assessment to multi-objective layout decision-making, enabling differentiated optimized layout of multi-tiered parks. The integrated framework effectively enhances the spatial resilience and resource utilization efficiency of urban green-space systems, facilitates high-quality and sustainable upgrading of urban living environments, and provides a referable innovative approach for multi-level urban park arrangement and refined multi-objective planning. Full article

Global development frameworks, including the New Urban Agenda (NUA) and the Sustainable Development Goals (SDGs), advocate for safe, inclusive, and accessible public open spaces (POSs). However, their implementation in transitional post-socialist urban contexts requires balancing urban safety, technological innovation, and democratic use of public space. This paper examines how these global agendas are localized in Novi Sad, Serbia, investigating the relationship between international policy objectives and urban governance during times of crisis. A triangulated mixed-methods approach was employed, combining a structured survey of 1200 residents on perceptions of safety and smart-city surveillance, a media review of POS-related violence (2021–2026), and direct field observations of mass gatherings, including COVID-19-era events and subsequent major citizen protests. The findings indicate important differences between official approaches to spatial governance and citizens’ lived experience. While technological and spatial management measures supported urban safety objectives, surveys and field observation findings suggest that perceived safety remained closely associated with visible presence, public trust, and community organization. The study highlights the challenges of balancing urban safety, civil liberties, and democratic access to POS in transitional urban contexts, concluding that achieving the objectives of the NUA requires governance frameworks that integrate technological innovation with participatory and inclusive urban planning. Full article

The King Abdulaziz Public Transport Project in Riyadh is one of the massive undertakings that could transform mobility and quality of life in the Saudi capital. However, a full grasp of its many-sided consequences is still hard to obtain. The project is expected to deliver several positive outcomes, including decreased traffic congestion and better air quality, as well as increased mobility; however, it remains vital that the impact of this development on different aspects of urban life is studied using modern spatial analysis methods. This research seeks to address this gap by delving into the project’s influence on land use patterns, transportation behaviors, economic development, urban growth, environmental conditions, population dynamics, and road network efficiency. Using these techniques, some of the achievements and struggles of the project are identified in terms of service coverage, travel times, and how well it fits within Riyadh’s sustainability objectives to reduce car dependency and increase ridesharing. In conclusion, the study aims to contribute knowledge that supports urban planning, policy formulation, and future infrastructure projects so that the King Abdulaziz Public Transport Project is better aligned with the needs of this growing city for a workable, sustainable Riyadh. The King Abdulaziz Public Transport Project is a significant step towards improving Riyadh’s transportation system and achieving environmental, economic, and social sustainability goals. It will contribute to alleviating traffic congestion, improving air quality, boosting economic growth, and enhancing the quality of life for residents. Sustainable landuse planning around the stations, with the allocation of green spaces and public facilities, is essential. Full article

As green building concepts continue to expand into public cultural spaces, green concert halls not only serve functions of cultural communication and artistic services, but also play an important role in shaping urban residents’ psychological experiences and well-being. However, existing studies on green buildings have mainly focused on energy performance and technical indicators, while limited attention has been paid to how green cultural buildings are associated with residents’ well-being through environmental perception. In the Chinese context, research specifically examining green concert halls remains scarce. Based on environmental psychology and restorative environment theory, this study takes the Chengdu City Concert Hall, which has received China’s Three-Star Green Building certification, as the research object. A conceptual model of “green concert hall design perception–perceived nature connectedness–perceived restorativeness–residents’ well-being” was constructed to explore the underlying mechanisms linking green concert hall design perception and residents’ well-being. Green concert hall design perception was conceptualized as a second-order construct consisting of four dimensions: green design legibility, eco-environmental comfort, green aesthetic integration, and green cultural symbolism. Perceived nature connectedness and perceived restorativeness were introduced as mediating variables. A survey was conducted among 879 Chengdu residents with concert-hall attendance experience, and structural equation modeling (SEM) was employed for empirical analysis. The results indicate that (1) green concert hall design perception is significantly and positively associated with residents’ well-being; and (2) perceived nature connectedness and perceived restorativeness both play significant mediating roles in the relationship between green concert hall design perception and residents’ well-being, while also forming a significant sequential mediating effect. The findings suggest that green concert halls are associated with more positive environmental experiences through ecological and aesthetic characteristics, and that residents’ well-being may be further linked to strengthened nature connectedness and restorative perceptions. This study extends research on green public cultural buildings from the perspective of residents’ psychological perception, and provides theoretical support and practical implications for human-centered green concert hall design and the development of urban green cultural spaces. Full article

As the number of objects in orbit increases every year, the number of objects re-entering Earth’s atmosphere grows as well. Re-entry path prediction is tricky, as atmospheric modeling lacks accuracy and requires constant monitoring of the object during re-entry. Ground-based sensors face limitations due to the field of view and weather. This paper explores the novel idea of using star trackers in very low Earth orbit to image Resident Space Objects (RSOs) that are on re-entry path and provides a comparison of different star trackers to determine the most effective parameters. A simulation with 1000 Resident Space Objects on re-entry path was performed and detectability analysis was run using AURICAM, SAGITTA, PCO, IDS, and FAI sensors placed in orbit between 200 and 600 km in altitude. The results show that all star trackers at any altitude were capable of detecting at least three RSOs on re-entry path and making at least 47 detections during the simulation period. In particular, instruments with larger aperture diameters such as SAGITTA and FAI and quantum efficiency performed better, making up to 134 detections and detecting up to 10 unique RSOs. They also detected a higher average signal-to-noise ratio. Detectability of RSOs is higher when the sensor is placed closer to the objects, with the most effective performance recorded at 300–400 km altitude. Future work should include practical testing of this technique. Full article

On-Orbit Servicing (OOS) represents a viable strategy toward a sustainable and extended exploitation of the Low-Earth-Orbit (LEO) environment. The design of OOS missions requires optimizing both the scheduling of visited objects and the transfer trajectory between each pair of orbits, resulting in the great complexity of the global mission planning problem. This research considers a servicing spacecraft equipped with a high-thrust propulsion system, required to perform multiple orbit transfers to visit several Resident Space Objects (RSOs) in a given time frame with minimum fuel consumption. The proposed method leverages a two-stage approach: (i) first, the optimal transfers are computed for all pairs of orbits and discretized dates, and the associated overall velocity changes are stored in a cost matrix; (ii) then, the problem of visiting all RSOs is cast as a search problem, and the solution space is explored through an ${\mathrm{A}}^{\ast }$ algorithm. The transfer strategy exploits intermediate drift orbits to increase the differential precession due to the $J_2$ harmonic of the Earth’s gravitational potential. Moreover, the ${\mathrm{A}}^{\ast }$ procedure leverages a heuristic function based on a modified version of the Held–Karp algorithm, which is proven to be admissible and consistent, meaning that the optimal solution is always reached. The proposed strategy is integrated within a flexible architecture, where operational constraints on phasing and servicing activities can be enforced as well. Finally, the methodology at hand is successfully applied to a case study from the literature involving three successive missions, in charge of visiting 5 RSOs each. Different discretization grids are considered, and the results are compared in terms of overall velocity change and computational time. Full article

Background: Private and community hosting have emerged as important community-based responses to forced displacement, through which host-country citizens provide accommodation, practical support, and relational care to refugees in domestic and community settings. These hosting arrangements extend hospitality beyond commercial and tourism contexts into everyday spaces of welcome, co-living, and social support. Existing literature has examined a range of hosting experiences, including reasons citizens choose to host, ways hospitality is practiced, challenges arising from hosting, and the impacts of hosting on hosts, refugees, and communities. However, the evidence remains fragmented across disciplines, including migration studies, social work, sociology, public health, and hospitality scholarship. Objective: This scoping review aims to map and synthesize the existing literature on why host-country residents and local hosting actors host refugees, with a focus on hosting motivations, hospitality practices, challenges, and impacts in private and community hosting. Methods: This review will follow the Joanna Briggs Institute methodology for scoping reviews and be reported in accordance with the PRISMA-ScR guidelines. Guided by the Population–Concept–Context framework, the review will include studies involving host-country residents and local hosting actors, engaged in refugee hosting. Literature published in English from 2010 onward will be identified through searches in MEDLINE, CINAHL, PsycINFO, Scopus, Web of Science, Sociological Abstracts, Social Services Abstracts, and selected grey literature sources. Two reviewers will independently screen records and extract data, which will be analyzed descriptively and thematically to map motivations, hospitality practices, challenges, and impacts in private and community hosting. Results: The review will generate a comprehensive map of the literature on refugee hosting in private and community settings. It will identify how hosting is conceptualized and practiced, the motivations driving citizen involvement, the relational and structural challenges associated with hosting, and the reported impacts on hosts, refugees, and communities. It will also highlight system-level support, policy considerations, and gaps requiring further attention through research and practice. Conclusions: This scoping review will provide an interdisciplinary synthesis of evidence on refugee hosting as a form of social and domestic hospitality. The findings will inform future research, policy, and community-based hosting initiatives and will contribute to a deeper understanding of the ethical, relational, and structural dimensions of refugee hospitality and hosting in host countries. Full article

With increasing urban solid waste generation and the advancement of Zero Waste City initiatives, sanitation-facility siting has become central to urban waste governance but continues to trigger Not-In-My-Backyard (NIMBY) conflicts related to perceived environmental risk, spatial equity, and asset-value concerns. Existing studies often explain NIMBY effects through objective exposure or facility distance, while less attention has been paid to the mismatch between objective risk and residents’ subjective fear and its cost implications. Taking Suzhou, China, as a case study, we develop an integrated framework to assess NIMBY effects associated with current and planned sanitation facilities. An objective risk index is constructed based on facility hazard, exposure, and vulnerability. Resident questionnaires are used to measure subjective fear, and the bias between objective risk and subjective fear is quantified. Probit, hedonic price, and welfare models are then combined to evaluate the effects of this bias on facility support, housing prices, and marginal social welfare losses. The results show that (1) sanitation facilities in Suzhou present clear type differentiation and spatial clustering, with terminal treatment facilities mainly located on the urban periphery, and transfer, sorting, and recovery facilities more embedded in daily living spaces; (2) stronger subjective fear, particularly risk perception, significantly reduces residents’ support for facility expansion, especially under the planned scenario; (3) perception bias is negatively associated with housing prices and generates substantial marginal social welfare losses, especially when the planned expansion of facilities is considered at the system level. This study extends the explanatory framework of environmental NIMBY effects and provides evidence for integrating risk communication, spatial equity compensation, and marginal social welfare loss reduction into Zero Waste City governance. Full article

Background: Upgrading existing housing, particularly affordable housing in China’s high-altitude cold regions, to near-zero energy standards requires balancing three key considerations: carbon reduction, life-cycle cost, and residents’ affordability. Methods: We developed a simulation-based multi-objective optimization framework to evaluate repair-and-retrofit packages involving the building envelope, ventilation, heating electrification, on-site renewables, and control strategies, subject to social feasibility and affordability constraints. Results: The Pareto-optimal solutions revealed a clear knee region in which substantial operational carbon reductions and acceptable thermal safety could be achieved at moderate investment levels. Further decarbonization was enabled by strong system-level synergies among heat recovery ventilation, heat pumps, and photovoltaic systems. Affordability-constrained optimization shifted the feasible solution space toward options associated with lower household energy burdens and more favorable distributional outcomes. Conclusions: Policy scenario analysis indicates that grid decarbonization and targeted financial support can expand the feasible space for low-carbon pathways and improve equity, thereby enabling scalable near-zero energy upgrading strategies. Full article

At this stage, China is entering a phase of development characterized by both an aging population and a declining birth rate. As a vital link between individuals and the city, communities face a dual challenge: on the one hand, demographic shifts have revealed that public spaces and facilities struggle to meet the diverse needs of residents of all ages; on the other hand, traditional planning often focuses on a single spatial dimension and lacks systematic research into residents’ temporal–spatial behaviors and interactions among diverse groups, leading to inefficient use of space and frequent conflicts over public activities. To this end, this paper conducts temporal–spatial behavior planning with the goal of maximizing the efficiency of activities and the utilization of time and space, taking into account the needs of different age groups. A case study was conducted using the Tuolejia District in Nanjing as an example. Based on intelligent data analysis and implementation, the results show that during the day, recreational spaces for children and adolescents in this neighborhood are more concentrated, with an utilization rate of over 85%. The amount of accessible space for seniors aged 60 and older has increased by approximately 30% (with a significant improvement in accessibility for the group of seniors aged 80 and older, who account for about 9% of the total). At night, the utilization rate of parking spaces for residents and visitors in the neighborhood exceeds 80%. This planning approach transcends the limitations of a single spatial dimension and proposes an integrated strategy for time-sharing, multi-objective optimization, and behavioral incentives in community public spaces designed to address intergenerational conflicts. It provides a practical framework and practical support for advancing the renewal of age-friendly communities. Full article

Background/Objectives: Although urban greening interventions are increasingly implemented to improve livability, environmental quality, and adaptation capacity in cities, their evaluation still predominantly relies on physical outputs rather than validated, resident-centered outcomes. This study examined whether the five-item attachment dimension of the Urban Green Attachment Scale (UGAS) can reliably indicate the social integration of newly introduced greenery in an SDG 11-oriented evaluation context. The present adaptation of the UGAS captures the perceived importance of the planting, its contribution to well-being, anticipated loss, willingness to protect it, and aesthetic appreciation. Methods: Data were collected through two independent face-to-face surveys conducted among residents of the same housing estate shortly after a greening intervention in May 2025 (n = 150) and September 2025 (n = 191). The first sample was used for exploratory factor analysis (EFA) and the second for confirmatory factor analysis (CFA). Reliability was assessed using Cronbach’s α and McDonald’s ω; inter-item associations were estimated using Kendall’s tau-b; and construct validity was examined through known-groups comparisons with theoretically relevant appraisals and stewardship-related indicators. Results: The adapted UGAS demonstrated high internal consistency, low floor and ceiling effects, and moderate to strong inter-item associations. Exploratory factor analysis supported a unidimensional solution with high loadings and 65.7% explained variance, and confirmatory factor analysis corroborated this structure after minor, theory-guided localized refinements. Higher UGAS scores were consistently observed among residents who reported stronger calming and home-related effects, perceived healthier local conditions, expressed willingness to help care for the plants, and demonstrated a readiness to cooperate in improving the area. Conclusions: The results support the five-item UGAS attachment score as a compact, psychometrically adequate measure of residents’ attachment to newly planted urban greenery. Rather than replacing official SDG indicators, the UGAS can complement them at the project level by determining if urban greening becomes socially meaningful and accepted and if it supports stewardship. In this sense, UGAS offers municipalities a practical tool for linking physical greening outputs with resident-centered outcomes relevant to inclusive public spaces, participatory urban development, and the long-term social durability of urban greening interventions. Full article

As urban waterfront public spaces have increasingly become important settings for residents’ daily leisure activities, there remains a lack of empirical evidence based on objective image data regarding how street-level visual environments influence different types of leisure activities. The existing studies have largely relied on macro-scale built environment indicators and paid limited attention to micro-scale visual perception from the pedestrian perspective. To address this gap, this study focuses on the core waterfront section of the Pearl River in Guangzhou. Behavioral observations were conducted across nine spatial units during different time periods on weekdays and weekends, yielding 54 samples of passive, active, and social activity intensity. Meanwhile, 109 street-view sampling points were established, generating 436 pedestrian-view images. Using Mask2Former with an ADE20K pre-trained model, visual environmental indicators—including the Green View Index (GVI), Sky View Index (SVI), built environment proportion, road proportion, and visual diversity (Entropy)—were extracted. Spearman correlation and multiple linear regression were applied to examine their effects on activity intensity. The results show that leisure activities are generally more active in the evening and on weekends, with social activities exhibiting the strongest temporal variation. Active activities remain relatively stable, passive activities show temporal dependence, and social activities display localized high-intensity clustering. Regression results reveal differentiated environmental responses: visual diversity has a stable positive effect on passive activities, active activities show weak associations with visual variables, and social activities are the most sensitive, with GVI, SVI, and built proportion showing significant negative effects, while visual diversity shows a significant positive effect. The social activity model also demonstrates the highest explanatory power (Adj. R² = 0.488). Overall, this study develops a street-view semantic segmentation-based method for quantifying waterfront visual environments, demonstrates the critical role of visual environmental composition in shaping activity patterns, and provides empirical support for the fine-grained and activity-oriented optimization of waterfront public spaces. Full article