João Araújo Afonso, Jorge Lino Alves, Gabriela Caldas, Barbara Perry Gouveia, Leonardo Santana and Jorge Belinha
This paper aims to evaluate the influence of the parameters of the Fused Filament Fabrication (FFF) process on the mechanical properties and on the mass of parts printed in…
Abstract
Purpose
This paper aims to evaluate the influence of the parameters of the Fused Filament Fabrication (FFF) process on the mechanical properties and on the mass of parts printed in Polylactic Acid (PLA). In addition, the authors developed predictive models for the analysed responses.
Design/methodology/approach
A full Factorial type of experimental planning method was used to define the conditions for manufacturing parts according to the variation of the construction parameters, extrusion temperature and print speed. Samples were printed for tensile, flexion and compression tests. Their mass was measured. Multiple regression methods, based on power equations, were used to build the forecasting models.
Findings
It was found that the extrusion temperature was the parameter of greatest influence in the variation of the analysed responses, mainly because it generates behaviour patterns and indirectly demonstrates thermal/rheological characteristics of the material used. Print speed affects responses, however, with variations dependent on part geometry and printer hardware/software. It was possible to establish prediction models with low error rates in relation to the experimental values.
Originality/value
The study demonstrates a good relation between the use of a structured experimental planning method as the basis for the development of predictive models based on mathematical equations, the same structure of which can be used to describe different responses.
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Miguel Castilho, Barbara Gouveia, Inês Pires, Jorge Rodrigues and Manuel Pereira
This paper aims to study the influence of the binder saturation level on the accuracy and on the mechanical properties of three-dimensional (3D)-printed scaffolds for bone tissue…
Abstract
Purpose
This paper aims to study the influence of the binder saturation level on the accuracy and on the mechanical properties of three-dimensional (3D)-printed scaffolds for bone tissue engineering.
Design/methodology/approach
To study the influence of the liquid binder volume on the models accuracy, two quality test plates with different macropore sizes were designed and produced. For the mechanical and physical characterisation, cylindrical specimens were used. The models were printed using a calcium phosphate powder, which was characterised in terms of composition, particle size and morphology, by X-ray diffraction (XRD), laser diffraction and Scanning electron microscopy (SEM) analysis. The sample’s physical characterisation was made using the Archimedes method (porosity), SEM, micro-computer tomography (CT) and digital scan techniques, while the mechanical characterisation was performed by means of uniaxial compressive tests. Strength distribution was analysed using a statistical Weibull approach, and the dependence of the compressive strength on the porosity was discussed.
Findings
The saturation level is determinant for the structural characteristics, accuracy and strength the models produced by three-dimensional printing (3DP). Samples printed with the highest saturation showed higher compressive strengths (24 MPa), which are over the human trabecular bone. The models printed with lower saturations presented the highest accuracy and pore interconnectivity.
Originality/value
This study allowed to acquire important knowledge concerning the effects of shell/core saturation on the overall performance of the 3DP. With this information it is possible to devise scaffolds with the required properties for bone scaffold engineering.
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Luís P. Amaral, Nelson Martins and Joaquim B. Gouveia
– The paper aims to deliver a general review of the methods used to pursue the concept of a “sustainable university”.
Abstract
Purpose
The paper aims to deliver a general review of the methods used to pursue the concept of a “sustainable university”.
Design/methodology/approach
The research was Internet based, and it included research papers, books, conference proceedings, technical reports and Internet Web sites. The review was divided in two main parts: sustainability implementation methods and assessment and report tools. In turn, the practices used on universities to implement included more “traditional” environmental sustainability initiatives and a more updated sustainable management systems.
Findings
Because “traditional” sustainability environmental sustainability initiatives have flaws, more recent tools were developed to help manage sustainability. Two sustainability management systems specifically oriented to universities are outlined on this paper. They both highlight the advantage of disposing a systematized management system; the need of address environmental issues and putting special attention on the use of resources, especially energy, on campus buildings; the social responsibility of the institution; and educational and research sustainability activities that must be taken on universities. Managing sustainability in a university would be facilitated if the procedure used to implement sustainability is aligned with the tool used that assesses its performance.
Originality/value
The paper presents an updated review of the efforts that universities have made in contributing to a sustainable development. It includes methods and tools used to manage sustainability within a university, including the ones used to implement, assess and report it. The paper also intends to highlight the need of consistency and coherence between the implementation method and the assessment and report tools.
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Sérgio B Gonçalves, Pedro Dantas, Francisco Guedes de Melo, João Gouveia, José Guimarães Consciência, Jorge Martins and Miguel Tavares da Silva
Arthroscopic osteochondroplasty is a minimally invasive procedure that has been used to treat femoroacetabular impingement syndrome, leading to significant improvements in…
Abstract
Purpose
Arthroscopic osteochondroplasty is a minimally invasive procedure that has been used to treat femoroacetabular impingement syndrome, leading to significant improvements in patients’ clinical outcomes and quality of life. However, some studies suggest that inadequate bone resection can substantially alter hip biomechanics. These modifications may generate different contact profiles and higher contact forces, increasing the risk of developing premature joint degeneration. To improve control over bone resection and biomechanical outcomes during arthroscopic osteochondroplasty surgery, this study aims to present a novel system for measuring femoroacetabular contact forces.
Design/methodology/approach
Following a structured design process for the development of medical devices, the steps required for its production using additive manufacturing with material extrusion and easily accessible sensors are described. The system comprises two main devices, one for measuring femoroacetabular contact forces and the other for quantifying the force applied by the assistant surgeon during lower limb manipulation. The hip device was designed for use within an arthroscopic environment, eliminating the need for additional portals.
Findings
To evaluate its performance, the system was first tested in a laboratory setup and later under in-service conditions. The 3D printing parameters were tuned to ensure the watertighness of the device and sustain the intraoperative fluid pressures. The final prototype allowed for the controlled measurement of the hip contact forces in real-time.
Originality/value
Using additive manufacturing and readily available sensors, the present work presents the first device to quantify joint contact forces during arthroscopic surgeries, serving as an additional tool to support the surgeon’s decision-making process regarding bone resection.
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Patrick Blessinger is the founder and Executive Director of the International Higher Education Teaching and Learning Association and a Research Fellow at the School of Education…
Abstract
Patrick Blessinger is the founder and Executive Director of the International Higher Education Teaching and Learning Association and a Research Fellow at the School of Education at St. John's University in Queens, New York, USA. He has taught over 150 college and university courses and he has served as a program chair at colleges and universities in the US and EU. He consults with HE institutions in the areas of technology innovation and internationalization and he serves as an academic and accreditation advisor for HE institutions. He is the co-founder and co-director of the Institute for Meaning-Centered Education. He is the founder and editor of the International HETL Review and co-editor of the Journal of Applied Research in Higher Education. He is co-editor of several volumes within the Cutting-edge Technologies in Higher Education book series (Emerald) and co-editor of the book, Meaning-Centered Education: International Perspectives and Explorations in Higher Education (Routledge: 2013). He attended Auburn University, Georgia Tech, and the University of Georgia. He is a peer-recognized expert and thought leader in the field of teaching and learning and he has received several academic awards including a Fulbright Scholarship from the US Department of State and a Governor's Teaching Fellowship from the State of Georgia, USA.
Laura A. Wankel and Patrick Blessinger
This book centers on several key areas of social engagement and social learning in higher education today, including social networking platforms and e-portfolios. In addition to…
Abstract
This book centers on several key areas of social engagement and social learning in higher education today, including social networking platforms and e-portfolios. In addition to these Web 2.0 technologies, rapid improvements in related communication technologies (e.g., broadband services, wireless, mobile phones, and tablets) have also provided the necessary infrastructure components by which educators implement innovative teaching and learning practices on a larger scale, in a more reliable manner, and in a more targeted fashion. These technologies are also transforming our views of what it means to learn in an increasingly globalized, interconnected, and pluralistic world. The authors have presented several perspectives on how to use social networking tools to better engage learners in more meaningful and authentic learning activities. Social networking sites like Facebook are not a panacea for effective learning, but they do provide instructors and students with a convenient platform for enhancing the teaching and learning process. Instructors also play an important part in modeling proper online behavior through their presence on the platform and their interaction with their students. However, these tools are only one piece of the learning puzzle. The ultimate goal is to enable students to become lifelong learners and to instill in them a high value for learning that matures over their lifetime. As such, these tools can be used to better engage students more deeply in authentic and personally meaningful learning experiences.
Contextualizing grammar in second language (L2) classrooms implies making grammar constructs relevant to the learners’ world; affording learners the opportunities to better comprehend and apply these concepts in their own milieus. This instructional design (ID) has been devised to contextualize grammar and to explore learner engagement of pre-service English teachers through Computer-Aided Learning (CAL) and Task-based Learning (TBL) in a technology-driven learning environment. CAL encompasses technology-aided discussions, multi-media presentations, online tests and exercises, and social media deployment. TBL, on the other hand, contextualizes grammar using technology and social network in planning, executing, and presenting four assigned tasks: picture essay, brochure design, dialogue composition, and comic strips illustration. Facebook is the e-portfolio of the class, archiving all group and individual output. The CAL-TBL tandem is propelled by group initiatives and class collaboration evident in group discussions and planning, microteaching, task presentations, peer reviews, and self-evaluations. These initiatives engage learners; empowering students to collaboratively take active part and responsibility for their own learning. The three-hour-class meets every week in a computer laboratory. The post-semester feedback and online poll course design review as well as the University Course Evaluation comments have shown that the ID, from the learners’ perspective, is effective in contextualizing grammar and in engaging learners.
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Mauro Dini, Ilaria Curina, Barbara Francioni, Sabrina Hegner and Marco Cioppi
The study aims to analyze the relationship between tourists' satisfaction and their sense of belonging in a specific cultural destination by also investigating the moderating role…
Abstract
Purpose
The study aims to analyze the relationship between tourists' satisfaction and their sense of belonging in a specific cultural destination by also investigating the moderating role of their on-site involvement, both offline (on-site activities at the destination) and online (social media activities). A further objective lies in exploring the relationship between tourists' sense of belonging and their adoption of environmentally responsible behavior while at the destination. Finally, the paper attempts to determine whether said behavior can predict tourists' pro-environmental behavior and recommendation intention.
Design/methodology/approach
To reach these objectives, a survey and a structural equation model, based on a sample of 647 visitors of an important world Heritage site UNESCO (i.e. Urbino), have been adopted.
Findings
Findings reveal a positive influence of sense of belonging on satisfaction and environmentally responsible behavior, which, in turn, influences pro-environmental behavior and Recommendation intention, thus triggering a virtuous process in the tourists' formation as responsible and loyal travelers. Moreover, results underline how the relationship between satisfaction and sense of belonging is significantly strengthened when tourists' on-site activity involvement increases. Conversely, the moderating role of social media involvement is not supported.
Practical implications
The present study offers important implications for different actors in the tourism sector, such as policy makers, destination marketing organizations (DMOs) and tourism operators.
Social implications
The present study explores the role of social media involvement, specifically during the tourist's holiday.
Originality/value
This study enriches the empirical evidence in the cultural tourism through an analysis focused on the tourists' perspective, especially by investigating the relationship between satisfaction and emotional constructs (i.e. sense of belonging) that are able to bring environmental and loyalty benefits to the destination. Moreover, although existing research has highlighted the positive influence of the tourists' involvement on their experience, there is a paucity of studies jointly analyzing the on-site and online activities in the sustainability field.
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Rossella Canestrino, Pierpaolo Magliocca, Marek Ćwiklicki and Barbara Pawełek
Adopting more sustainable and social-oriented perspectives is crucial for the emergence of the so-called humane entrepreneurial ecosystems (HEEs), the last ones supporting the…
Abstract
Purpose
Adopting more sustainable and social-oriented perspectives is crucial for the emergence of the so-called humane entrepreneurial ecosystems (HEEs), the last ones supporting the improvement of both economic, environmental and social wealth. Entrepreneurs act as keystone players in each entrepreneurial ecosystem, thus the emergence of Humane Entrepreneurship (HumEnt) is crucial in shaping HEEs. Given the role of culture in affecting HumEnt, the relationships between Humane Orientation (HO) – as defined in the GLOBE project – and the basic components of Humane Entrepreneurship (HumEnt) were, particularly, explored in a selected sample of countries. Both Intellectual Capital (IC) and knowledge management (KM) perspectives were adopted in pursuing the research goal.
Design/methodology/approach
The study approaches this by the mean of the Ward method with Euclidean squared distance and the k-means method. The GLOBE project, the Global Entrepreneurship Monitor (GEM), the Environmental Performance Index (EPI) and the International Social Survey Program (ISSP) were used as data sources. Correlations between HO “as is” scores and each components of HumEnt were checked for the world sample (N = 36), as well as for the groups of innovation-driven countries (N = 17) and European countries (N = 14).
Findings
Research results show a conditional confirmation of the developed hypotheses, depending on countries cultural levels of HO, with a moderating role exercised by the economic development on the relationship between culture and HumEnt.
Originality/value
Given the increasing pressure of fundamental societal challenges, such as climate change, poverty and increasing inequality within and between countries intensified by pandemic (UN report, 2021), integrating the more traditional approaches to profit seeking with the more sustainable and human-centric perspective is a priority for both scholars and society at large. Previous researches do not provide explanation about the contextual factors responsible for the emergence of more humane-oriented entrepreneurial ecosystems, especially when referring to culture. This article broadens our understanding about the reason why both HumEntr and HEEs differently arise and develop in different cultural contexts.
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João Fragoso Januário, Carlos Oliveira Cruz, Humberto Varum and Vítor Faria e Sousa
From the perspective of housing affordability, Portugal is an interesting case study, considering that Portugal ranks 5th in terms of price-to-income ratio and has experienced…
Abstract
Purpose
From the perspective of housing affordability, Portugal is an interesting case study, considering that Portugal ranks 5th in terms of price-to-income ratio and has experienced, since 2015, a significant increase in real estate prices.
Design/methodology/approach
The provision of housing is a critical social development factor. With the growing worldwide urbanization and the demand pressure over real estate in many cities, the problem of affordability has gained increase attention by policy makers. Housing affordability is hardly a new topic from a literature perspective, but the recent post-pandemic worldwide inflation growth has re-centered affordability as key topic in the housing agenda. This paper provides a comprehensive overview on past literature and a detailed analysis on the Portuguese market at the municipal level, by analyzing the changes in housing affordability in recent years.
Findings
Despite this growth, overall, affordability has improved. The study also shows the importance of municipal-level analysis, given the significant geographical differences. The authors' study confirms that many municipalities, outside metropolitan areas, exhibit low levels of affordability. Nevertheless, markets with higher average real estate values tend to exhibit even lower affordability, outpacing the higher levels of income.
Originality/value
Previous studies have focused on affordability issues on a national or highly aggregated level or focusing only on the two largest metropolitan areas in the country. This paper provides a deeper understanding on the inequalities of housing affordability between Portuguese municipalities.