Recovery and Recycling of Valuable Metals

Metals have always played a significant role in human life, and the current global growth and prosperity are directly dependent on these materials. With the rapidly growing global demand for metals, their extraction from natural minerals (as their primary sources) has been enhanced, causing a significant reduction in the grade and quality of the ores in ore deposits and leading to the production of huge amounts of waste, which requires management. In light of this, new proposals to develop more advanced metal recovery technologies from minerals are needed. Additionally, the huge quantity of waste generated through all steps of metal production is known to be a source of environmental pollution, while its valorization can create value via recycling metals or even though use in the production of other valuable materials. Such waste valorization is also in line with the United Nations’ Sustainable Development Goals (SDGs), as well as the implementation of the Paris Agreement. In this regard, the recycling of end-user products in order to reproduce valuable metals can also create significant value and reduce mining activities, and thus, their harmful consequences worldwide. Therefore, research and development in the state-of-the-art technologies for the recovery and recycling of metals are absolutely necessary. The aim of this Special Issue was to collect a range of articles on different aspects of valuable metal recovery and recycling from primary and secondary sources, as well as to decipher all new methods, processes, and knowledge in valuable metal production. We hope that this open access Special Issue will provide a great opportunity to demonstrate the work of researchers working in this area all around the world and help to provide new ideas for researchers who are working in the areas of hydrometallurgy, mineral processing, and waste recycling and valorization

Demand-side approaches for limiting global warming to 1.5 °C

The Paris Climate Agreement defined an ambition of limiting global warming to 1.5 °C above preindustrial levels. This has triggered research on stringent emission reduction targets and corresponding mitigation pathways across energy economy and societal systems. Driven by methodological considerations, supply side and carbon dioxide removal options feature prominently in the emerging pathway literature, while much less attention has been given to the role of demand-side approaches. This special issue addresses this gap, and aims to broaden and strengthen the knowledge base in this key research and policy area. This editorial paper synthesizes the special issue’s contributions horizontally through three shared themes we identify: policy interventions, demand-side measures, and methodological approaches. The review of articles is supplemented by insights from other relevant literature. Overall, our paper underlines that stringent demand-side policy portfolios are required to drive the pace and direction of deep decarbonization pathways and keep the 1.5 °C target within reach. It confirms that insufficient attention has been paid to demand-side measures, which are found to be inextricably linked to supply-side decarbonization and able to complement supply-side measures. The paper also shows that there is an abundance of demand-side measures to limit warming to 1.5 °C, but it warns that not all of these options are “seen” or captured by current quantitative tools or progress indicators, and some remain insufficiently represented in the current policy discourse. Based on the set of papers presented in the special issue, we conclude that demand-side mitigation in line with the 1.5 °C goal is possible; however, it remains enormously challenging and dependent on both innovative technologies and policies, and behavioral change. Limiting warming to 1.5 °C requires, more than ever, a plurality of methods and integrated behavioral and technology approaches to better support policymaking and resulting policy interventions

Introduction: Legal Form and Cultural Symbol – Music, Copyright and Information Studies

Writers in information and communication studies often assume the stability of objects under investigation: network nodes, databases, information. Legal writers in the intellectual property tradition often assume that cultural artefacts exist as objects prior to being governed by copyright law. Both assumptions are fallacious. This introduction conceptualises the relationship of legal form and cultural symbol. Starting from an understanding of copyright law as part of systems of production (in the sense of Peterson 1976), it is argued that copyright law constructs the artefacts it seeks to regulate as objects that can be bought and sold. In doing so, the legal and aesthetic logic of cultural symbols may clash, as in the case of digital music (the central focus of this special issue)

Technologies, infrastructures and migrations: material citizenship politics

This article aims to explore the multiple uses and consequences of different technologies and infrastructures in the context of migrations and how such uses and consequences inhabit and transform migrants’ rights and subjectivities. It reviews relevant literature at the intersection of citizenship, critical migration studies and science and technology studies (STS), focusing in particular on the current debates underway within critical citizenship studies that examine how technologies and infrastructures shape the ability to acts of citizenship. By mobilizing insights from STS, we focus on how these political subjectivities are shaped by certain sociomaterial and epistemic practices. By introducing the notion of material citizenship politics, the article outlines a way to differentiate three different constitutive forms between technologies, infrastructures and citizenship in migrations. Technologies and infrastructures can (1) constrain acts of citizenship in migration and border regimes; (2) constitute contestation and participation over citizenship; or (3) enable and shape alternative acts of citizenship in migration and border regimes. As it provides a theoretical background to the special issue, the article also serves as the introduction to the issue.This work has received funding from the European Research Council (ERC) under the EU Horizon 2020 research and innovation programme (Consolidation grant, agreement No. [648608]), within the project `EXCHANGE -Forensic geneticists and the transnational exchange of DNA data in the EU: Engaging science with social control, citizenship and democracy', led by Helena Machado and hosted at the Institute for Social Sciences of at the University of Minho, Portugal. Furthermore, this work is funded by the Portuguese Foundation for Science and Technology (FCT/MEC) through national funds within the scope of the CES-SOC/UID/50012/2020 Strategic Project

Developing a Second Life virtual field trip for university students: an action research approach

Background: Integrating 3D virtual world technologies into educational subjects continues to draw the attention of educators and researchers alike. The focus of this study is the use of a virtual world, Second Life, in higher education teaching. In particular, it explores the potential of using a virtual world experience as a learning component situated within a curriculum delivered predominantly through face-to-face teaching methods. Purpose: This paper reports on a research study into the development of a virtual world learning experience designed for marketing students taking a Digital Promotions course. The experience was a field trip into Second Life to allow students to investigate how business branding practices were used for product promotion in this virtual world environment. The paper discusses the issues involved in developing and refining the virtual course component over four semesters. Methods: The study used a pedagogical action research approach, with iterative cycles of development, intervention and evaluation over four semesters. The data analysed were quantitative and qualitative student feedback collected after each field trip as well as lecturer reflections on each cycle. Sample: Small-scale convenience samples of second- and third-year students studying in a Bachelor of Business degree, majoring in marketing, taking the Digital Promotions subject at a metropolitan university in Queensland, Australia participated in the study. The samples included students who had and had not experienced the field trip. The numbers of students taking part in the field trip ranged from 22 to 48 across the four semesters. Findings and Implications: The findings from the four iterations of the action research plan helped identify key considerations for incorporating technologies into learning environments. Feedback and reflections from the students and lecturer suggested that an innovative learning opportunity had been developed. However, pedagogical potential was limited, in part, by technological difficulties and by student perceptions of relevance

Conceptual Frameworks for Multimodal Social Signal Processing

This special issue is about a research area which is developing rapidly. Pentland gave it a name which has become widely used, ‘Social Signal Processing’ (SSP for short), and his phrase provides the title of a European project, SSPnet, which has a brief to consolidate the area. The challenge that Pentland highlighted was understanding the nonlinguistic signals that serve as the basis for “subconscious discussions between humans about relationships, resources, risks, and rewards”. He identified it as an area where computational research had made interesting progress, and could usefully make more

Legal Rights and Issues Surrounding Conception, Pregnancy, and Birth

Advances in medicine are reported almost daily in the media. Medical researchers have developed and are continuing to develop new methods of creating, saving, and prolonging life. This Special Project examines the impact that rapidly advancing medical technology has on the law governing conception, pregnancy, and birth. Although medical techniques have advanced rapidly during the past decades, state and federal legislatures have responded in-adequately to the legal consequences of these new birth technologies. The resulting lag between technology and the law has forced courts to confront new situations that do not fit neatly into the statutory framework created to deal with past fact situations. For example, courts have applied statutes prohibiting child bartering to surrogate parenting cases and statutes prohibiting fetal experimentation to artificial insemination cases although it is clear that the legislators never considered such fact patterns when passing the statutes. A lag is inevitable because the law can only respond to, rather than predict, emerging medical developments. Nonetheless, legislators must respond promptly by confronting the new legal issues that result from new medical technologies. One impediment to prompt legislative response to the lag between medical technology and the law is the controversial nature of the legal problems posed. Abortion continues to be an extremely controversial issue thirteen years after the Supreme Court legalized it in the landmark decision Roe v. Wade. The Baby Doe issue of whether to force hospitals and parents of severely deformed newborns to provide medical care is another extremely controversial issue. Baby Doe has become highly politicized as the Reagan administration, Congress, right-to-life groups, disability groups, medical professionals, and other groups have taken stances. Surrogate parenting also has produced controversial situations. In one incident, a New York couple contracted with a California surrogate mother. When the surrogate mother breached the agreement, the couple brought suit. The court discovered that the couple consisted of a man and a transsexual, thus raising the issue of whether transsexuals or homosexuals should be allowed to adopt children by contracting with surrogate mothers