Sustainability — Open Access Journal

The spatial equity of outdoor evacuation sites designated for emergency evacuation must be secured. In particular, public administrators must ensure spatial equity in preparing for unpredictable evacuation demands, such as earthquakes. This study analyzed the spatial equity of earthquake evacuation shelters in Daegu, South Korea, by using population data at the local level by time- and date-based mobile phone location data (i.e., floating population data). We compared our analysis of the spatial equity and error rate in this case with census data. Ultimately, our results demonstrate that the use of census population data can cause significant error in evaluations of the equity of evacuation shelter accessibility when the floating population data acquired through mobile phone location data are assumed exact. Full article

To reduce thermal susceptibility and improve rutting and fatigue cracking resistance, increasingly more non-conventional additives and materials have been used in road pavement asphalt mixes in recent years. Non-conventional materials mainly include recycled materials, which reduce production costs and lead to environmental benefits related to their reuse. The aim of this research was to evaluate the influence of recycled tyre rubber in the production of asphalt concrete for road pavements built with recycled aggregates consisting of steel slag in relation to possible improvements in structural performance during operation (i.e., fatigue and rutting). Steel slag has a higher bulk specific gravity than natural aggregates, and it has a very porous surface that allows for a different interaction with the bitumen and the crumb rubber compared to traditional aggregates. To this end, two mixtures of asphalt concrete are compared. One was mixed with a modest percentage by weight of crumb rubber using the “dry” technique, and the other mixture did not contain crumb rubber. Indirect tensile and compression tests with cyclic loads were performed to determine the mechanical behaviour of the two mixtures at different temperatures and under different load frequencies. The results of this research indicate the better performance of the modified mixture with crumb rubber, which agrees with other experiments in the literature that have been made using natural aggregates. Furthermore, a significant increase in stiffness was found at high temperatures (up to 30%), a slight reduction (up to 8%) was found at low temperatures, and a reduction in permanent deformation was found under cyclic loads. Full article

This article presents a comparative review of the most commonly used nano-additives for bituminous mixtures: nanoclays (NC), nanosilicates, carbon nanotubes (CNTs), graphene nanoplatelets (GNPs), nano-calcium oxide (CaO), and nano-titanium dioxide (TiO₂). In this study, the mechanical behavior of the obtained additive mixture is evaluated. According to the revised literature, the results strongly depend on type, concentration, and dispersal of used nano-additive. In fact, it has been seen that simple shear mixing followed by sonication homogenizes the distribution of the nanoparticles within the bituminous matrix and favors the bonds’ formation. The viscosity of the mixture of bitumen with nanoparticles improves with the increase of the percentage of additive added: it indicates a potential improvement to permanent deformation and rutting. Another benefit is an increased resistance of the binder to aging. Furthermore, it has been shown that the nanoparticles are able to prolong the service life of a bituminous mixture by means of various interdependent chemical–physical mechanisms that can influence the resistance to fatigue failure or the ability to self-heal. However, the effectiveness of these improvements depends on the particle type, added quantity and mixing technique, and the tests carried out. Full article

The environmental crisis due to air pollution, high CO₂ emissions, noise from traffic and soil ceiling requires profound changes to the car-dependent transport system. This article examines the political dynamics of German transport politics, focusing on the National Platform for Electric Mobility (NPE), a high-level political forum that aimed to accelerate the run-up of the electric mobility market in Germany. The NPE provides an interesting case to study the strategies of stakeholders in influencing policy-making and shaping alternative pathways to the car-centered transport system. The paper focusses on actor constellations and the conflicts that arise within the NPE, as well as the temporal dynamics within the electric mobility debate. The findings suggest that the NPE contributed to a narrow understanding of mobility transformation based on road transport and electric cars, but that it is better described as ecological modernization. Within this narrow framework, a fundamental conflict unfolds between strong advocates versus those slowing down the ecological modernization of the car. A third group demands at least a partial departure from the automobile-centered model but remains marginalized within the NPE. Aside from this core conflict, members of the NPE struggled over the location for battery cell production, the introduction of a purchase grant known as the environmental bonus, and the expansion of battery recharging infrastructure. These issues illustrate that discussions within the NPE relate to the political debates about the future of mobility, which have intensified in Germany in recent years. However, the case of the NPE shows that high-level stakeholder platforms are not an adequate forum to legitimately deliberate and to practically contribute to a wider and more fundamental rethink of future mobility concepts. Full article

This article proposes a mathematical model for integrating terminal operation strategies with shipment scheduling. We are motivated by findings from the literature on the integrated design of logistic systems. The objective of this research is to efficiently utilize the existing hub terminals and transport network by considering the minimization of costs related to terminal congestion, transport, and carbon dioxide (CO₂) emissions. Cooperative behaviors of terminal managers and fleet assignment managers are modeled in a bi-level problem framework. The total cost includes a processing cost and transport cost, and CO₂ related to the assigned fleets. We introduce a terminal cost function to capture the relationship between unit processing cost with respect to hub delay, which allows us to find the minimum cost path and efficiently distribute shipments to hub terminals. The case study shows that the collaborative logistics outperforms a single routing strategy and capacity expansions in minimization of both total cost and CO₂ emissions. Full article

The present paper analyzed the influence of ethically minded consumer behavior on retailer’s commitment to sustainable development as perceived by the consumer, and their contribution to the chain of relationships “store equity–loyalty–word of mouth communication”, in the context of retailing. Responses from 317 hypermarket customers in Ecuador were analyzed. The model was estimated using the partial least squares technique. The results show the sustainable development actions implemented by retailers, together with perceived value, contribute significantly to store equity creation, which explains customer loyalty and, ultimately, positive word-of-mouth communication. However, the most concerned consumers of ethical aspects value the retailer’s efforts towards sustainability to a lesser extent. The findings of this research allow developing a series of implications for the managers of these establishments. Full article

The role that schools play in the detection of and intervention into child abuse is fundamental. This study investigates and compares knowledge of child abuse among trainee teachers and in-service teachers in Spain. To this end, a total of 224 teachers (144 teachers in training and 80 teachers in service) working in Early Childhood Education and Primary Education participated in this study, using self-developed scales (Scale of knowledge of child abuse, Scale of action against child abuse, Scale of aspects for improvement in child abuse). The results indicate that there are no significant differences between trainees and teachers in the previous training and in the level of knowledge and action in relation to child abuse. However, significant differences were found in the cases detected and intervened in, with a greater number of teachers in service having detected and acted on cases of child abuse. In regard to the interest in improving the way that child abuse is dealt with, teachers in training obtained a higher average score. In conclusion, we note that the relationship between knowledge about child abuse, action taken and the aspects for improvement is significant and positive, so if a teacher has more knowledge about child abuse, he or she will also know how to act better and will have greater interest in implementing improvement measures. Full article

In recent decades the growing interest in forested areas has led to a higher level of appreciation and consideration regarding the various benefits and services provided by forests. Despite this, when it comes to acknowledging their economic value and their capacity to produce income, the production of timber seems to be the main or even the only function that is considered. However, by adopting a sustainable forest management approach, the value related to non-market forest functions could also be considered. The present paper aims to quantify the potential income related to the recreational value of coppice forest by considering three different management systems: traditional coppice, active conversion to high forest and the natural evolution of forest. In order to do so, a contingent valuation method was used, and 248 forest users were surveyed in the region of Tuscany, Italy. The surveys included a revised price-list method, and the results obtained showed the existence of willingness to pay (WTP) for the maintenance of forests. Users showed a strong preference for conversion to high forest, while natural evolution was the least preferred management option. People’s perception on this matter was also assessed based on their specific location, by georeferencing all of the respondents’ answers: considering this, it was observed that belonging to a municipality located in or close to the mountains (i.e., mountain and natural municipalities) influenced the users’ WTP to maintain natural evolution. Full article

The urban energy transition towards more sustainable energy production and consumption systems is at the top of the European Union political agenda. Several demonstration projects are dealing with the deep-energy retrofit of real-estate assets to show how technological and societal innovation can provide new investment opportunities while enhancing citizens’ quality of life by delivering multiple benefits. In this framework, the EU smart city project SINFONIA has developed and tested a new comprehensive framework to define, identify, and evaluate the main multiple benefits expected from similar initiatives. The present contribution reviews the three assessment exercises carried out in the lighthouse city of Bolzano during the project execution, consisting of an investigation of the users’ stated preferences, an evaluation of consumers‘ revealed preferences and a multicriteria analysis of homeowners’ priorities. It offers an overview of the main achievements and sheds light on further investigatory paths applicable to Positive Energy Districts assessment. Full article

Although kindergarten children are the group of citizens who will face the consequences of today’s environmental challenges, research on their knowledge about environmental sustainability is limited. In June 2019, we interviewed 56 children (five to six years old) from eight kindergartens in Norway and asked kindergarten staff and the children’s parents to fill out a short questionnaire. The aim of the study was to investigate children’s knowledge of how our actions affect the natural environment and children’s self-declared sense of belonging to nature. Our results show that upon completing kindergarten, many children had gained an early understanding of environmental sustainability. Garbage disposal, deforestation, and air pollution from vehicles were the environmental issues children were most aware. We detected a positive association between time spent in nature with parents and children’s knowledge; this emphasizes the importance of children spending time in nature with their parents. Full article

Urban public spaces are a key component to the well-being and prosperity of modern society. It has been increasingly important to improve the qualities and maximize the usages of urban public spaces. There is a lack of studies that investigate how people use and perceive urban parks using quantitative analysis of location-based social media reviews. This study tackles this gap by introducing a case study that uses social media reviews (Tripadivisor.com) to understand the perceived site quality and experiences of Bryant Park in New York City. A large dataset including 11,419 Tripadvisor reviews from 10,615 users was collected. LDA (Latent Dirichlet Allocation), a natural language processing and machine learning technique, was used to perform topic modeling analysis that could reveal hidden themes in large amounts of text. The results include five semantic topics and their associated topic terms. A comprehensive overview of the user experiences in Bryant Park were provided along with their weekly and monthly dynamics. The findings provide insights for future public space designers and managers by revealing how users describe the designs and operations of Bryant Park. Full article

After the 2007–08 global financial crisis, research flourished on entrepreneurship through digital innovation in the financial market as well as on investors’ influence on digital technology-based entrepreneurs’ funding decisions. This study combines these two research streams to analyze the decision-making criteria for funding financial technology companies (fintechs), hybrid companies that combine digital entrepreneurship, technology, and banking. The study first uses prior literature to derive important characteristics to define fintechs and then uses 12 expert interviews to elaborate on decision-making criteria in funding. Except for smaller peculiarities, fintech funding does not appear to differ from that of other digital entrepreneurship in different markets, and—as with most digital business models—scalability was identified as a key criterion. Additionally, by serving as a major provider of money for young companies, banks have changed their role and positioning in funding new financial technology entrepreneurs. Through developments in digital technology, banks have shifted from traditional money-lending activities (i.e., debt-financing) to becoming stakeholders in fintechs and, hence, equity investors. We also describe how these formerly distinct fields have converged due to regulatory requirements, digital newcomers, and a need for constant innovation, with their future sustainable development dependent on sharing and collaboration. Full article

The purpose of this research is to consider if the growing popularity of sustainable investment does not create additional risks in investing. Different views on sustainable investments were analyzed to identify different approaches to the main risks. A quantitative analysis was carried out to investigate the possible benefits and advantages of sustainable investment. Without taking into account the social perks of investing in sustainable funds, this study evaluates the performance and economic returns of both sustainable and traditional funds. The research was carried out in two parts by comparing samples of 30 sustainable and 30 traditional funds. Firstly, such methods as annual returns, standard deviations, Sharpe ratios, skewness, and kurtosis were calculated and analyzed. The Capital Asset Pricing Model (CAPM), Fama–French three-factor model and Carhart four-factor model were used to value different market portfolios. The findings of this study suggest that sustainable funds are less risky than traditional funds. However, at the same time, we want to point to pay attention to the period of our analysis and to have in mind that an increasing demand of social responsible assets increases risks as well. However, no clear evidence was found to confirm that sustainable funds can generate higher returns compared to traditional piers or benchmark index. Moreover, after studying different methods the study reveals that the Fama–French three-factor model was the most suitable for explaining the traditional and sustainable funds’ results. Full article

Human activity has led to degradation of the natural environment, with far-reaching impacts for society and the economy, sparking new conceptual framings for how people interact with, and depend upon, the environment. The bioeconomy and natural capital concepts both blend economics and natural sciences and propose new interdisciplinary, environmental sustainability framings. Despite this similarity, the two concepts are rarely applied together. This paper applies a natural capital lens to the bioeconomy at three different levels: environmental sustainability framings; experts’ principles for a sustainable bioeconomy; and a case study of EU policy. We first construct an integrated cascade model that combines the unrealised potential of bioresources alongside unrecognised environmental services that tend to be systematically undervalued or ignored. Subsequently, we present five cornerstones identified from the sustainable bioeconomy-related literature from a natural capital perspective and highlight avenues of complementarity. The paper concludes with a policy case study of the EU Bioeconomy Strategy through a natural capital lens. There is evidence that the EU strategy has become increasingly aligned with the natural capital concept, but there is scope for further integration. The natural capital concept and related toolbox is an asset for the future bioeconomy to ensure it meets its environmentally sound and ecologically conscious objectives. Full article

The circular economy requires high-value material recovery to enable multiple product lifecycles. This implies the need for additive manufacturing to focus on the development and use of low-impact materials that, after product use, can be reconstituted to their original properties in terms of printability and functionality. We therefore investigated reprintable materials, made from bio-based resources. In order to equally consider material properties and recovery during development, we took a design approach to material development. In this way, the full material and product life cycle was studied, including multiple recovery steps. We applied this method to the development of a reprintable bio-based composite material for extrusion paste printing. This material is derived from natural and abundant resources, i.e., ground mussel shells and alginate. The alginate in the printing paste is ionically cross-linked after printing to create a water-resistant material. This reaction can be reversed to retain a printable paste. We studied paste composition, printability and material properties and 3D printed a design prototype. Alginate as a binder shows good printing and reprinting behaviour, as well as promising material properties. It thus demonstrates the concept of reprintable materials. Full article

A banker plant system is a rearing and release method for biological control agents, and in recent years has gained serious attention among plant propagators for its use in regulating common greenhouse and nursery pests. In the current study, the suitability of four ornamental pepper (Capsicum annuum L.; Solanales: Solanaceae) banker plant candidates, Black Pearl (BP), Explosive Ember (EE), Masquerade (MA), Red Missile (RM), and a commercial pepper cultivar, Blitz (BL), were evaluated with three main objectives: (1) to assess host preference of three major arthropod pests of agricultural importance, Bemisia tabaci Gennadius, Polyphagotarsonemus latus Banks, and Frankliniella occidentalis Pergande among selected pepper cultivars; (2) to determine the susceptibility of plant cultivars to three different pests; and (3) to assess the effect of tuft domatia on the abundance of the predatory mite Amblyseius swirskii Athias–Henriot. In choice and no-choice assays, BL and BP were highly susceptible to P. latus with a moderately high damage rating index of >3.5/5; B. tabaci and F. occidentalis were abundant on BL and EE. A positive correlation was observed between the number of tuft domatia and the A. swirskii count. Although all ornamental pepper cultivars exhibited varying degrees of susceptibility to different arthropod pests, if used strategically, cultivars MA and RM can be used to develop a banker plant system and help reduce multiple pests in greenhouses or interiorscapes. Full article

The Kingdom of Saudi Arabia is undergoing a major transformation in response to a revolutionary vision of 2030, given that healthcare reform is one of the top priorities. With the objective of improving healthcare and allied professional performance in the Kingdom to meet the international standards, the Saudi Commission for Health Specialties (SCFHS) has recently developed a strategic plan that focuses on expanding training programs’ capacity to align with the increasing demand for the country’s healthcare workforce, providing comprehensive quality assurance and control to ensure training programs uphold high quality standards, and providing advanced training programs benchmarked against international standards. In this research paper, we describe our attempt for developing a general framework for key performance indicators (KPIs) and the related metrics, with the aim of contributing to developing new strategies for better medical training compatible with the future. We present the results of a survey conducted in the Kingdom of Saudi Arabia (KSA), for the enhancement of quality of postgraduate medical training. The recent developments in the field of learning analytics present an opportunity for utilizing big data and artificial intelligence in the design and implementation of socio-technical systems with significant potential social impact. We summarize the key aspects of the Training Quality Assurance Initiative and suggest a new approach for designing a new data and services ecosystem for personalized health professionals training in the KSA. The study also contributes to the theoretical knowledge on the integration of sustainability and medical training and education by proposing a framework that can enhance future initiatives from various health organizations. Full article

With the recent increase in used trading sites that support used trading, users want to find various information in real time, and the development of the Internet consists of direct and indirect connections between businesses and consumers. This change created a new type of C2C (Commerce to Commerce) transaction. However, each used trading site has its own characteristics, making it difficult to standardize one. Therefore, in this paper, we construed a system that provides the user’s used transaction data in real time and provides the desired information quickly. In this paper, we developed the crawler system needed to develop an integrated transaction system for second-hand goods through Internet e-commerce transactions, defined morphological analyzers, and described the service that users can employ in the web environment by using the system developed in the paper. Full article

The Spanish educational system has heterogeneous and diverse students that have increasing learning needs. All this has forced it to reinvent itself, designing and applying a model of inclusive education that serves to offer a higher quality educational response to these students. One of the main pillars for achieving this challenge is the teaching staff. The aim of this study is to evaluate the training and attitudes of future teachers to work in inclusive educational environments. The present research had a sample of 245 future teachers in the degrees of Early Childhood Education and Primary Education, who answered the Teacher Training Evaluation Questionnaire for Inclusion (CEFI-R), specific to the object of study. As the main conclusions, we obtained that the perception of future teachers towards the concept of inclusion is positive and that the training they receive is adequate, although there is room for improvement. However, there is a need to adjust the curriculum, increase the period of practice and better coordinate the actions of the members involved in the educational process. Full article