scholarly journals A Systematic Literature Review on Additive Manufacturing in the Context of Circular Economy

2021 ◽  
Vol 13 (11) ◽  
pp. 6007
Author(s):  
Stavros Ponis ◽  
Eleni Aretoulaki ◽  
Theodoros Nikolaos Maroutas ◽  
George Plakas ◽  
Konstantina Dimogiorgi
Keyword(s):  
Additive Manufacturing ◽  
Circular Economy ◽  
Business Models ◽  
Critical Evaluation ◽  
Research Area ◽  
Added Value ◽  
Future Research ◽  
Current State ◽  
The Status ◽  
Traditional Manufacturing

Additive Manufacturing (AM) is, undoubtedly, one of the most promising and potentially disruptive technologies of the Industry 4.0 era, able to transform the traditional manufacturing paradigm and fuel the generally accepted and necessary shift towards the conceptualisation, design and adoption of sustainable and circular business models. The objective of this paper is to contribute to the structure of the scientific field residing in the intersection of AM and Circular Economy (CE), by determining the status of its current state-of-the-art, proposing an initial typology in an attempt to contribute to the existing efforts of structuring this rather novice research area and pinpointing research gaps where more focus should be put, and highlighting areas with a significant potential for added-value future research. To that end, a sample of 206 papers, published from 2014 to 2020, was retrieved from the Scopus and Google Scholar databases. After studying and critically evaluating their content in full, contributions were classified into six thematic categories, providing a first typology of the current literature, followed by a detailed section highlighting and taxonomizing existing review studies. Next, contributions of the three categories of interest are discussed followed by a critical evaluation of the study’s contribution, inherent limitations and future research potential.

scholarly journals Assessment of Circular Economy within Portuguese Organizations

2018 ◽  
Vol 10 (7) ◽  
pp. 2521 ◽  
Author(s):  
Luis Fonseca ◽  
José Domingues ◽  
Maria Pereira ◽  
Florinda Martins ◽  
Dominik Zimon
Keyword(s):  
Circular Economy ◽  
Quantitative Research ◽  
Online Survey ◽  
Business Models ◽  
Environmental Management System ◽  
Future Research ◽  
Sustainable Business ◽  
Wide Range ◽  
New Business ◽  
The Status

The move towards a new Circular Economy (CE) economic model has been advocated and supported in Portugal, however, there is limited research on this topic. To address this gap, a quantitative research based on an online survey was carried out among 99 Portuguese organizations, encompassing a wide range of sectors and sizes. The results show that CE is regarded as a strategic and relevant issue for profitability and value creation. Furthermore, the perception that it requires the adoption of new business models in addition to the classical “reduce, reuse and recycle” approach is growing. Moreover, based on the hypotheses raised, results suggest that the level of CE adoption is positively impacted by the status of the EMS (Environmental Management System) certification and the willingness to improve the environmental performance and achieve a sustainable business model. However, CE activities are still relatively modest and a friendlier context (fiscal, legal, organizational, etc.) and the stronger support from supply chain agents and consumers are required. Future research should focus on how to design and shape the transition from a linear to a CE economy and to ascertain if the positive attitude towards CE is materialized in changing the way business is done.

scholarly journals Assessment of Circular Economy within Portuguese Organizations

2018 ◽  
Author(s):  
Luis Miguel Fonseca ◽  
José Pedro Domingues ◽  
Maria Teresa Pereira ◽  
Florinda Figueiredo Martins ◽  
Dominik Zimon
Keyword(s):  
Circular Economy ◽  
Quantitative Research ◽  
Online Survey ◽  
Business Models ◽  
Environmental Management System ◽  
Future Research ◽  
Sustainable Business ◽  
Wide Range ◽  
New Business ◽  
The Status

The move towards a new Circular Economy (CE) economic model has been advocated and supported in Portugal, however, there is limited research on this topic. To address this gap, a quantitative research based on an online survey was carried out among 99 Portuguese organizations, encompassing a wide range of sectors and sizes. The results show that CE is regarded as a strategic and relevant issue for profitability and value creation. Furthermore, the perception that it requires the adoption of new business models in addition to the classical “reduce, reuse, and recycle” approach is growing. Moreover, based on the hypotheses raised, results suggest that the level of CE adoption is positively impacted by the status of the EMS (Environmental Management System) certification and the willingness to improve the environmental performance and achieve a sustainable business model. However, CE activities are still relatively modest and a friendlier context (fiscal, legal, organizational, etc.) and the stronger support from supply chain agents and consumers are required. Future research should focus on how to design and shape the transition from a linear to a CE economy, and to ascertain if the positive attitude towards CE is materialized in changing the way business is done.

Nano-Sized and Nanocrystalline Calcium Orhophosphates in Biomedical Engineering

2009 ◽  
Vol 3 ◽  
pp. 59-92 ◽  
Author(s):  
Sergey V. Dorozhkin
Keyword(s):  
Bone Repair ◽  
Dental Enamel ◽  
Building Blocks ◽  
Research Area ◽  
Future Research ◽  
Biological Origin ◽  
Current State ◽  
Calcium Orthophosphates ◽  
Recent Developments ◽  
Hard Tissue Engineering

There has been much recent activity in the research area of nanoparticles and nanocrystalline materials, in many fields of science and technology. This is due to their outstanding and unique physical, mechanical, chemical and biological characteristics. Recent developments in biomineralization have demonstrated that nano-sized particles play an important role in the formation of the hard tissues of animals. It is well established that the basic inorganic building blocks of bones and teeth of mammals are nano-sized and nanocrystalline calcium orthophosphates (in the form of apatites) of a biological origin. In mammals, tens to hundreds of nanocrystals of biological apatite are found to combine into self-assembled structures under the control of bio-organic matrixes. It was also confirmed experimentally that the structure of both dental enamel and bones could be mimicked by an oriented aggregation of nano-sized calcium orthophosphates, determined by the biomolecules. The application and prospective use of nano-sized and nanocrystalline calcium orthophosphates for clinical repair of damaged bones and teeth are also known. For example, a greater viability and a better proliferation of various cells were detected on smaller crystals of calcium orthophosphates. Furthermore, studies revealed that the differentiation of various cells was promoted by nano-sized calcium orthophosphates. Thus, the nano-sized and nanocrystalline forms of calcium orthophosphates have the potential to revolutionize the field of hard tissue engineering, in areas ranging from bone repair and augmentation to controlled drug delivery devices. This paper reviews the current state of knowledge and recent developments of various nano-sized and nanocrystalline calcium orthophosphates, covering topics from the synthesis and characterization to biomedical and clinical applications. This review also provides possible directions of future research and development.

scholarly journals How to Carry out the Transition towards a More Circular Tourist Activity in the Hotel Sector. The Role of Innovation

2019 ◽  
Vol 9 (2) ◽  
pp. 47 ◽  
Author(s):  
Carmen Florido ◽  
Marta Jacob ◽  
Margarita Payeras
Keyword(s):  
Circular Economy ◽  
Business Models ◽  
Design Guidelines ◽  
Future Research ◽  
Tourism Destination ◽  
Circular Model ◽  
Tourism Sector ◽  
Great Pressure ◽  
Hotel Sector

Tourism causes important environmental impacts and can generate great pressure on local resources, such as land, water, energy and food, generating large amounts of waste, as well as problems of congestion, noise and air pollution. The circular economy is presented as an alternative model to the linear model, which recognizes the fundamental role of the environment, its functions and the interaction between the environment and the economic system. The hotel sector and the tourism sector in general, have been criticized for not adequately addressing environmental problems and global warming. In order to carry out the transition to a circular economy (CE), it is essential to innovate in business models, designing a circular business model. The objective of this work is to design guidelines on possible actions and opportunities that allow us to carry out a successful transition towards a circular model in hotel companies, as well as to design a model for this transition in a tourism destination, analyzing the roles of the different agents in this transition. Findings identified the main opportunities and benefits of this transition in the hotel sector and describes a three-axis model to carry out this transition in a tourism destination, identifying the roles of public administrations and DMOs, resident population and the tourism sector. Future research implications are also discussed.

scholarly journals Maturity and Decline in Press Markets of Small Countries. The Case of Austria

2018 ◽  
Vol 44 ◽  
Author(s):  
Andrea Grisold ◽  
Daniel Grabner
Keyword(s):  
Business Models ◽  
Daily Newspaper ◽  
Comprehensive Overview ◽  
Newspaper Industry ◽  
Ownership Structures ◽  
The Great Recession ◽  
Current State ◽  
Small Countries ◽  
The Status ◽  
Media Concentration

Digitalisation, changes in consumer behaviour and the repercussions of the Great Recession seriously threaten the traditional business models of print media. The paper at hand contributes a small state perspective on these issues by analysing the daily newspaper market in Austria in its maturity and decline. We provide a comprehensive overview of the developments and current state of the newspaper industry for the period 2000-2016, with a special emphasis on the move to digital. Thus we examine trends in circulation, online reach and revenue structures. In addition, ownership structures are explored, followed by an analysis of media concentration. We address how media policy, including subsidy schemes, have contributed to the status quo of the Austrian media landscape and evaluate how proposed policy changes take digital transition into account. Finally, core company strategies employed by newspaper enterprises are identified.

scholarly journals Environmental management of mineral resource complex enterprises in the implementation of the circular economy concept

2020 ◽  
pp. 75-86
Author(s):  
Mochalova Liudmila ◽  
◽  
Sokolova Olga ◽  
Keyword(s):  
Mineral Resource ◽  
Circular Economy ◽  
Environmental Performance ◽  
Business Models ◽  
Negative Impact ◽  
Critical Evaluation ◽  
Environmentally Sustainable ◽  
Organization And Management ◽  
Significant Negative Impact ◽  
Production Cycles

Introduction. Enterprises of the mineral resource complex play a significant role in the economy of our country, the development and wealth of which depend on the volume and variety of minerals in the subsurface. At the same time, the activities of enterprises of the mineral resource complex have a significant negative impact on the environment, affecting all its elements. This leads to the need to manage the environmental performance of these enterprises. The aim of this work is to study management technologies that can contribute to closed production cycles creation at enterprises of the mineral complex and real improvement of their environmental performance in terms of implementing the concept of circular economy. The methodology of the research includesthe study, critical evaluation and systematization of technologies for closed production cycles organization and management at enterprises of the mineral resource complex. ISSN 0536-1028 «Известия вузов. Горный журнал», № 6, 2020 85 Research results. The objects of research are such management technologies as: circular business models proposed in the report of the Ellen MacArthur Foundation, schemes-hierarchies of waste management with a different composition of R elements, and logistics techniques for managing waste as specific material flows. These technologies are quite consistent with each other and, when applied together, can help to increase the circular economy development index in the conditions of mineral resource complex enterprises. Conclusion. The coordinated development of management technologies contributes to the implementation of a circular economy concept at the enterprises of the mineral resource complex, as well as their movement towards environmentally sustainable development and ensuring competitiveness.

Microstructure, Mechanical and Corrosion Behavior of Additively Manufactured Steel: A Review (Part 1)

2020 ◽  
Vol 62 (5) ◽  
pp. 503-516
Author(s):  
Emel Taban ◽  
Olatunji Oladimeji Ojo
Keyword(s):  
Additive Manufacturing ◽  
Future Research ◽  
Research Directions ◽  
Novel Technology ◽  
Current State ◽  
Future Research Directions ◽  
Modern Manufacturing ◽  
Mechanical Properties And Corrosion ◽  
Manufacturing Technologies ◽  
Insight Into

Abstract Flexible and digital manufacturing technologies like additive manufacturing (AM) have evolved as the future of modern manufacturing with the capability of obtaining multi-dimensional components and material functionality improvement. In the past decade, the additive manufacturing of steel has advanced into an effective approach for controlling local microstructure and fabricating hybrid build with tailored performance. As an emerging technology, there are still some challenges in the additive manufacturing of steel that need to be circumvented in order to attain the full potentials of this novel technology. This review paper examines the current state of additively manufactured steel as well as the associated microstructure, mechanical properties, and corrosion of as-built steel. An insight into further and future research directions is provided.

In Defence of Mobile Technologies Exploring the Socio-Technological Dimensions of M-Learning

2011 ◽  
pp. 67-78 ◽  
Author(s):  
Ayse Kok
Keyword(s):  
Learning Experience ◽  
Research Area ◽  
Mobile Technologies ◽  
Educational Services ◽  
Future Research ◽  
Current State ◽  
The Poor ◽  
Key Points ◽  
Mobile Phone Applications ◽  
Future Research Directions

There has been a rapid growth in the research concerning mobile phones and the delivery of the learning experience in developing countries in recent years. The aim of this chapter is to improve understanding of this expanding research area and in so doing consider the potential for mobile phone applications for the delivery of educational services for the poor. The current state of knowledge is assessed by reviewing the existing research articles drawn from both peer-reviewed academic journals and non-peer reviewed studies and other practitioner-orientated sources. Issues relating to educational needs and the measurement of impacts have been comparatively neglected, whilst application design and adoption have received greater attention. Emphasis tends to be on devices and new ways to deliver services, but ignores the broader context of educational services for the poor and tends to be technology-led (Duncombe, 2006). In order to correct this imbalance in research, the paper identifies key points relating to concepts, methodologies, issues addressed and evidence presented and provides pointers to future research directions.

Circular Economy and Circular Business Models in the Actual Global Ecological Context

2020 ◽  
pp. 178-197
Author(s):  
Dana Maria (Oprea) Constantin ◽  
Sorinel Căpușneanu ◽  
Dan Ioan Topor ◽  
Hassan Danial Aslam
Keyword(s):  
Sustainable Development ◽  
Circular Economy ◽  
Business Models ◽  
Future Research ◽  
Successful Implementation ◽  
Ecological Context ◽  
The Sustainable Development ◽  
Theoretical Approaches ◽  
The Difference ◽  
The Impact

This chapter aims to synthesize some of the current issues of the circular economy and circular business models. Based on the international literature, the chapter highlights aspects such as the conceptual theoretical approaches of the circular economy and circular business models, interconnecting the principles of the circular economy, the difference between the linear and the circular economy, the circular economy and the sustainable development, the supply chain within the circular economy, possible business models of the circular economy, advantages and limitations in the successful implementation of the circular economy and supporting sustainability, other aspects of the circular economy and sustainability. The covered topics are based on the studies conducted by specialists and also present some author opinions on the sustainable development and circular economy. The chapter ends with the authors' conclusions on the impact of the circular economy and circular business models in the actual ecological context, launching possible future research topics for specialists.

scholarly journals Leadership: the complexities and state of the field

2018 ◽  
Vol 30 (5) ◽  
pp. 514-528 ◽  
Author(s):  
Catherine Marie Clark ◽  
Christian Harrison
Keyword(s):  
Research Area ◽  
Future Research ◽  
Content Type ◽  
Research Opportunities ◽  
Research Fields ◽  
Current State ◽  
Narrative Literature ◽  
Narrative Literature Review ◽  
Extensive Body ◽  
Leadership Approaches

Purpose The purpose of this paper is to advance contemporary cognisance of the leadership field and its current state, through the synthesis and development of earlier contributions. A taxonomy of evolutionary eras is tendered, from which future research opportunities can be extrapolated. Design/methodology/approach This paper conducts a narrative literature review of significant leadership literature. There is a focus on prominent contributions which are considered to have been highly influential within the field, while acknowledging other notable influences. Findings Leadership is found to be a multifaceted and evolving field, which continues to produce further research fields. This dynamism hinders the progression of leadership to achieve integration. Eleven interrelated eras of leadership, which hold varying research value, were found. While some eras superficially appear to be discredited, there is arguably scope for these to be developed in contemporary context. Currently, the leadership approaches which are replete with research opportunities include servant leadership, a skills approach and an entrepreneurial leadership. Research limitations/implications Leadership is a vast research area with numerous contributions to its body of work; therefore, this review has focused on prominent contributions and has not attempted to include all available literature. The dissemination of leadership literature has allowed for research gaps to emerge and future research recommendations to be drawn. Originality/value While there is an extensive body of leadership literature, there are few reviews of the literature. A comprehensive contemporary review facilitates an examination of the current complexities and state of the leadership field.

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