Search Results (2,014)

Spacecraft catering to the Lunar Gateway or other “permanent” stations in the lunar vicinity would require frequent travel between periodic orbits around the Earth–Moon $L_1$ and $L_2$ Lagrange points. The transition through the Hill sphere is often characterized by close passages of our nearest neighbor—rendering the optimization problem numerically challenging due to the increased local sensitivities. Depending on the mission requirements and resource constraints, transfer architectures must be studied, and trade-offs between flight time and fuel consumption quantified. While direct low-thrust transfers between the circular restricted three-body problem periodic orbit families have been studied, the asymptotic flow in the neighborhood of the periodic orbits could be leveraged for expansion and densification of the solution space. This paper presents an approach to achieve a dense mapping of manifold-assisted, low-thrust transfers based on initial and terminal coast segments. Continuation schemes are utilized to attain the powered intermediate time-optimal segment through a multi-shooting approach. Interesting insights regarding the linear correlation between $\Delta$V and change in reduced two-body osculating elements associated with the initial-terminal conditions are discussed. These insights could inform the subsequent filtering of the osculating selenocentric periapsis map and provide additional interesting and efficient solutions. The described approach is anticipated to be extremely useful for future crewed and robotic cis-lunar operations. Full article

This paper systematically discusses the impact of kitchen environment design on users’ well-being. Based on the user-centered design concept, this paper focuses on the theoretical framework of positive psychology and combines quantitative and qualitative research methods. Firstly, using bibliometric analysis tools (CiteSpace 6.1.R1 and VOSviewer 1.6.20), 1256 related articles in the Web of Science Core database were analyzed to reveal the multidimensional association between kitchen design and user well-being. It was found that improving kitchen air quality, optimizing space layout design, intelligent design, and family interaction significantly improve users’ mental health and happiness. Then, based on the PERMA model of positive psychology, this paper discusses the support path of kitchen design to users’ psychological needs from five dimensions: positive emotion, engagement, relationships, meaning, and accomplishment. Optimizing the kitchen environment can enhance user experience by creating an immersive experience and positive feedback and promoting family communication, social interaction, cultural heritage, and sustainable development. Based on research results and cutting-edge design cases in the discussion section, a home kitchen design strategy for improving user welfare through the PERMA model is proposed. Finally, follow-up research can further explore the differentiated needs of different cultural backgrounds and user groups to promote the combined application of innovative kitchen technology and positive psychology and further focus on kitchen environment and health equity, especially for developing and vulnerable countries—group-specific needs. Full article

Indigenous women experience disproportionately higher rates of adverse health outcomes. Few studies have explored the root of these problems or defined health and wellness from the perspectives of Indigenous women. Our objective was to elicit views on Indigenous women’s health from women who are Indigenous and/or have experience working with Indigenous communities across Turtle Island and Hawai‘i (e.g., United States). Informed by intersectionality as a social critical theory, we convened a workshop to engage in a co-creative consensus-building and expert decision process using design thinking. The two-day workshop embraced Indigenous values of land, sacred spaces, genealogy, family, rituals, and culture. Participants included United States-based Native and Indigenous women (n = 16) and allies (n = 7). Participants focused on answering key questions such as “What are priority areas for Indigenous women’s health”? and “What are the key facilitators and barriers to improving Indigenous women’s health”? Co-created priority lists for each of these topics were generated. Participants overwhelmingly reported satisfaction with the workshop process and emphasis on a strength-based, culturally driven approach to share their stories, which contextualized the ideas, concerns, and priorities of Indigenous women who self-reflected on their own health and wellness. Creating culturally safe spaces for Indigenous people to reflect on their own hopes for the future relates to the theme by describing a process to bridge traditional healing with modern-day practices to build pilina. Full article

This research explores the integration of biomimicry and architectural/urban genotype concepts to model psychologically acceptable environments. Drawing on foundational psychological theories—Gestalt, Attention Restoration, Prospect-Refuge, and Environmental Psychology—this study examines the private–public interface at the various urban resolutions, encompassing land plots, buildings, and urban structures. Biomimicry serves as a unifying framework, linking these theories with principles derived from natural systems to create sustainable and psychologically beneficial designs. The methodology incorporates simulative modeling, employing space syntax and isovist analysis to quantify key spatial features such as proximity, complexity, and refuge. This study evaluates traditional historical architectures from diverse cultural contexts, such as Islamic medina, Medieval European town, and modernist urbanism, to identify patterns of spatial organization that balance human psychological needs and ecological sustainability. Findings highlight the fractal and hierarchical nature of spatial structures and the importance of integrating human-scale, culturally relevant designs into modern urban planning. By establishing a replicable framework, this research aims to bridge theoretical and practical gaps in environmental psychology, biomimicry, and urban design, paving the way for resilient and adaptive environments that harmonize ecological and human well-being. Full article

Close contact with nature helps moderate public emotions and enhance happiness. As an important space for the public to connect with nature, the urban park waterfront environment plays a significant role. Studying the characteristics of landscape elements contributes to the optimization of the urban park natural environment. In this study, the waterfront spaces of 23 urban parks in Shenyang were selected in order to categorize urban park waterfront spaces from the perspective of landscape elements and to explore the relationship between the characteristics of landscape elements in different types of waterfront spaces and public visual satisfaction. Using qualitative analysis, typical spatial types were identified based on differences in landscape elements. Content analysis was used to extract and quantify the characteristics of landscape elements for various waterfront spaces. Through orthogonal experimental design, virtual scenarios were created to evaluate public satisfaction. Methods such as the least significant difference multiple comparison analysis (LSD) were applied to explore the effects of landscape element characteristics on satisfaction in different types and differences within groups. Among the four types of waterfront spaces identified in the experiment, the landscape elements that influenced spatial satisfaction were primarily concentrated in plant characteristics and pavement characteristics. In different types of spaces, the impact of landscape element factors at different levels varied. The study introduced virtual experiments to analyze the characteristics of landscape elements in waterfront spaces, which provided a new method for the satisfaction research of waterfront spaces. The results are a valuable guidance for the scientific classification of urban park waterfront spaces. A new perspective for enhancing the urban park waterfront landscape was supplied. Full article

Urban public space faces increasing challenges due to the accelerating impacts of climate change, necessitating a paradigm shift in how cities adapt their built environments. This paper presents a case study on integrating Nature-based Solutions(NbSs) with urban infrastructure, focusing on the design and development of Urban Oasis, a modular and multi-sensory urban furniture system. Urban Oasis functions as a climate adaptation tool, incorporating rain gardens to manage stormwater, mitigate urban heat island effects, and enhance biodiversity while integrating smart features such as climate sensors, irrigation systems, lighting, speakers, and electric vehicle chargers. Through a practice-based design methodology, the study explores how transdisciplinary collaboration can inform the development of adaptive, resilient, and equitable urban interventions. The findings demonstrate the potential of NbS-integrated urban infrastructure to address the complexities of climate adaptation while enhancing social, ecological, and technological resilience. The results, validated through an integrated design checklist, contribute to ongoing discussions on urban design frameworks, emphasizing a multi-layered and systemic approach that intertwines architecture, social innovation, multi-species design, and sensory engagement to reimagine public space for future climate resilience. Full article

This study aims to explore the impact of the timing (day vs. night) and location (green space vs. non-green space) of outdoor physical activity on college students’ mental health. We designed a cross-sectional study based on self-reported data, asking participants to recall their physical activity and mental health status over the past month through a questionnaire. Specifically, a survey was conducted at a university in Chongqing, collecting data on outdoor physical activity and mental health indicators (including anxiety, depression, mental well-being, life satisfaction, happiness, and stress) from 418 students (75 females). The questionnaire was distributed via an online platform, allowing students to complete it using either their mobile phones or computers. The data collection took place in December 2024. The results showed that about half of the participants preferred engaging in outdoor physical activity in the nighttime, with most choosing green spaces. Regression analysis revealed that participants who engaged in outdoor physical activity at night had significantly lower anxiety levels compared to those who engaged in outdoor physical activity during the day (mean difference (MD) = −1.015; 95% CI = −1.974 to −0.055; p = 0.038). Additionally, compared to participants who engaged in outdoor physical activity in green spaces, those who engaged in physical activity in non-green spaces reported lower levels of mental well-being (MD = −1.531; 95% CI = −2.480 to −0.582; p = 0.002) and subjective happiness (MD = −0.462; 95% CI = −0.917 to −0.007; p = 0.047). Sensitivity analysis indicated that, for those who participated in nighttime activities, engaging in outdoor physical activity in green spaces was associated with higher levels of mental well-being (MD = 2.025; 95% CI = 0.810 to 0.324; p = 0.001) and happiness (MD = 0.583; 95% CI = 0.026 to 1.140; p = 0.040). Sensitivity analysis also revealed slight gender differences; however, the findings related to females should be interpreted with caution due to the insufficient sample size. Overall, despite some differences in time and location choices, engaging in outdoor physical activity at night in green spaces appears to associate with college students’ health, particularly their happiness and mental well-being. This study provides preliminary evidence of the potential benefits of nighttime green outdoor physical activity for improving college students’ mental health and offers directions for future research in this area. Full article

This study integrates space syntax and big data from the catering industry to explore the impact of grid and organic street patterns on the spatial distribution of restaurants from the perspective of urban morphology. Space syntax is a set of theories and techniques for the analysis of spatial configurations. Focusing on five areas of the Macau Peninsula, this study models urban forms using space syntax. Syntactic parameters and Dianping data are analyzed through geographic visualization, correlation analysis, and descriptive statistics. The results reveal that grid-patterned streets provide a relatively equitable commercial environment through a structured hierarchy, whereas organic-patterned streets foster commercial diversity via more complex accessibility patterns. Additionally, at the local network level, a “cultural layer network” mechanism is revealed in organically shaped streets, supporting the stable distribution of different types of restaurants within specific accessibility ranges. For the first time, this study employs high precision (street-level accuracy), multidimensional analysis (number of restaurants and number of reviews), and a systematic methodology (“form-function” research framework) within the same space syntax model to uncover the effects of different urban morphologies on restaurant distribution. Collectively, these findings highlight street morphology’s key role in shaping vibrant commercial street networks in rapidly urbanizing contexts, reveal the morphological–socioeconomic synergy underpinning local catering ecosystems, and offer robust empirical guidance for integrated urban renewal, planning, and design strategies. Full article

The welded beam design problem represents a real-world engineering challenge in structural optimization. The objective is to determine the optimal dimensions of a steel beam and weld length to minimize cost while satisfying constraints related to shear stress ($\tau$), bending stress ($\sigma$), critical buckling load ($Pc$), end deflection ($\delta$), and side constraints. The structural analysis of this problem involves the following four design variables: weld height ($x_1$), weld length ($x_2$), beam thickness ($x_3$), and beam width ($x_4$), which are commonly denoted in structural engineering as $h,l,t,b$ respectively. The structural formulation of this problem leads to a nonlinear objective function, which is subject to five nonlinear and two linear inequality constraints. The optimal solution lies on the boundary of the feasible region, with a very small feasible-to-search-space ratio, making it a highly challenging problem for classical optimization algorithms. This paper explores the application of quantum computing to solve the welded beam optimization problem, utilizing the unique properties of quantum computers for constrained optimization in engineering problems. Specifically, we employ the D-Wave quantum computing system, which utilizes quantum annealing and is particularly well-suited for solving constrained optimization problems. The study presents a detailed formulation of the problem in a format compatible with the D-Wave system, ensuring the efficient encoding of constraints and objective functions. Furthermore, we analyze the performance of quantum computing in solving this problem and compare the obtained results with classical optimization methods. The effectiveness of quantum computing is evaluated in terms of computational efficiency, accuracy, and its ability to navigate complex, constrained search spaces. This research highlights the potential of quantum algorithms in tackling real-world engineering optimization problems and discusses the challenges and limitations of current quantum hardware in solving practical industrial application issues. Full article

The relationship between financial systems and entrepreneurial development is explored in this paper, specifically how the conditions and characteristics of a country’s financial system affect entrepreneurial opportunities within a space of sustainability and inclusivity. The study is conducted using a mixed methods approach consisting of both a systematic literature review and econometric modeling, coupled with qualitative analysis of a subsample of countries to analyze these dynamics. At a fundamental level, it seeks to analyze the dynamics of financial systems, including the regulatory frameworks, market structures, and access to finance, and their role in forming an entrepreneurial landscape and contributing to the development of sustainable and inclusive ecosystems. The results show strong patterns and challenges in how financial systems support entrepreneurship. Areas of investigation include the role of financial institutions and markets in organizing access to finance (including the impact of regulatory barriers on entrepreneurial activities) and the integration of sustainability principles in policy and practice. This study stresses the need to align financial system policies with the goals of sustainable entrepreneurship so as to facilitate inclusive economic growth. Additionally, the research points out directions for how to make finance more accessible, foster more innovation, and remove the inefficiencies of regulation. For policymakers, investors, and researchers, the insights are designed to improve the entrepreneurial ecosystems through targeted investments as well as simplifying the financial processes. Through proactive actions, stakeholders have the ability to utilize entrepreneurialism as a tool for economic growth, societal progress, and ecological sustainability. The findings of this research contribute to the current ongoing discourse in sustainable entrepreneurship by furthering the stream of debate proposing how financial systems facilitate or inhibit entrepreneurial outcomes. Full article

Background/Objectives: Tablet is the most popular oral solid dosage form, and high-shear wet granulation and tableting (HSWGT) is a versatile technique for manufacturing tablets. The conventional pharmaceutical development for HSWGT is carried out in a step-by-step mode, which is inefficient and may result in local optimal solutions. Inspired by the co-design philosophy, a formulation–process–product integrated design (FPPID) framework is innovatively brought forward to enable the target-oriented and simultaneous exploration of the formulation design space and the process design space. Methods: A combination of strategies, such as a material library, model-driven design (MDD), and simulation-supported solution generation, are used to manage the complexity of the multi-step development processes of HSWGT. The process model was developed at the intermediate level by incorporating dimensionless parameters from the wet granulation regime map approach into the process of the partial least square (PLS) model. The tablets tensile strength (TS) and solid fraction (SF) could be predicted from the starting materials’ properties and process parameters. The material library was used to diversify the model input and improve the model’s generalization ability. Furtherly, the mixture properties calculation model and the process model were interconnected. Results: A four-step FPPID methodology including the target definition, the formulation simulation, the process simulation, and the solution generation was implemented. The performance of FPPID was demonstrated through the efficient development of high-drug-loading tablets. Conclusions: As a holistic design method, the proposed FPPID offers great opportunity for designers to handle the complex interplay in the sequential development stages, facilitate instant decisions, and accelerate product development. Full article

This study focuses on downtown Beijing to explore the spatial distribution characteristics of emotions and their influencing factors from the perspective of landscape ecology. The research reveals significant spatial agglomeration in the distribution of emotions, with hot spots primarily concentrated around parks, commercial centers, and areas surrounding social service facilities, such as schools and hospitals. By contrast, historical sites and museums are mostly cold spots for emotions. An analysis of various landscape pattern indices shows that indices such as the spatially explicit index of evenness (SIEI), the largest patch index (LPI), the number of patches (NP), and the Shannon–Wiener diversity index (SIDI) are positively correlated with residents’ emotions. This suggests that evenly distributed landscape elements, large natural patches, a rich variety of landscape types, and high landscape diversity can effectively enhance residents’ emotional well-being. Conversely, complex landscape shape indices and high aggregation indices may negatively impact emotions. Based on these findings, it is recommended that urban planning optimize the urban green space system, increase the area and number of natural patches, pay attention to the diversity of landscape design, simplify the shape of the landscape, and reasonably control the aggregation of the landscape to create a more emotionally caring urban space. Full article

Urban environments have incorporated sustainable development into their planning by designing more green spaces. Access to urban green space is the key to the progress of urban sustainability, not only environmentally and ecologically but also socially. Research on social sustainability in parks can be achieved through the inclusive design of park settings that encourage diverse social activities. However, previous research rarely considers how park settings can foster social sustainability for young people. Within this context, this paper employs a qualitative research approach to explore young people’s preferences and engagement with parks through art-based and visual methods to understand how they interact with parks in the context of social sustainability. The visual survey, comprising 32 park scene photos, was administered to 192 youth (ages 9–17) in the Moreton Bay Region, Queensland, Australia. These photos captured four park features: play areas and playgrounds; informal and open areas; formal spaces and pathways; and sports spaces. The findings show that young people like park environments with a balance of physical activity, socialisation, and connection to natural areas. Playgrounds were selected for their active play areas, and open spaces were selected for their social and leisure possibilities. Formal pathways, particularly those connected to natural areas, were selected for their quiet and socialising potential, and sports areas, especially those with equipment, were less preferred due to their solitary nature. The findings highlight the importance of designing parks that promote social sustainability through fostering inclusivity and social cohesion. Such insights inform urban planning policies for making public spaces to meet diverse social needs and support social interactions. Full article

As China’s rural revitalization progresses, the green and sustainable development of traditional dwellings has gained significant attention. Traditional Qiang dwellings in western Sichuan, located in high-altitude cold regions, often feature thick walls and small windows, limiting air circulation. Buffer spaces play a key role in improving indoor air quality and reducing energy consumption through natural ventilation. This study explores traditional Qiang dwellings in western Sichuan through field research, architectural analysis, and numerical simulations. The study analyzes three buffer space types and compares natural ventilation in dwellings with and without buffer spaces. The results show better air circulation in buildings with buffer spaces. The simulation further shows that when the courtyard’s aspect ratio is 1.3 and the width-to-height ratio is 0.9, ventilation and air renewal rates are optimized. Based on this, the study proposes natural ventilation optimization strategies to reduce reliance on mechanical systems and improve energy efficiency. The study provides a scientific basis for low-carbon Qiang dwelling design and offers practical strategies for improving living environments, supporting sustainable rural development. Full article

Background/Objectives: The stabilization disc (SD) for orthodontic mini-implants is a novel device designed to enhance anchorage stability and minimize the risk of mini-implant mobility. The disc features a flat structure with four prongs and is crafted from biocompatible materials such as titanium or stainless steel. It provides additional support to mini-implants by improving force distribution and reducing stress concentration around the insertion site. This study aims to evaluate the biomechanical performance of mini-implants with an SD compared to without-SD mini-implants, with a specific focus on their ability to maintain anchorage under orthodontic loading conditions. Methods: A finite element analysis (FEA) model was created for a commercially available mini-implant (2.0 mm in diameter and 12 mm in length). The mandible’s anatomical structure was reconstructed in 3D from computed tomography (CT) scans using SpaceClaim software 2023.1. To simulate real-world orthodontic conditions, forces of 10 N were applied at an angle of 30°. This retrospective study explores the role of SDs in enhancing mini-implant stability by reducing displacement and optimizing stress distribution. The evaluation included analyzing von Mises stress, cortical bone deformation, and mini-implant movement under simulated orthodontic loading. Results: The results demonstrate that the SD significantly reduces maximum total displacements by over 41% and redistributes von Mises stresses more evenly across the mini-implant and surrounding bone. Cortical bone stress and deformation were reduced in cases utilizing the SD, indicating enhanced implant stability and durability. Conclusions: The stabilization disc enhances mini-implant stability by improving stress distribution and reducing deformation without requiring permanent implant modifications. Its adaptability makes it a valuable solution for managing variable bone density and high orthodontic forces, offering a promising advancement in orthodontic anchorage. Full article