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The purpose of this paper is to investigate the combination of selective laser melting (SLM) and 5-axis CNC milling to produce parts from titanium powder. The aim is to achieve a more resource-efficient manufacturing process by reducing material wastage and machining time, while adhering to quality requirements.

A benchmark titanium aerospace component is manufactured with two different approaches using subtractive and additive manufacturing technologies. The first component is produced from a solid billet using only 5-axis CNC milling. The second component is grown from powder using SLM to produce a net-shaped part of which the final shape and part accuracy are achieved through 5-axis CNC milling. The potential saving of material and machining time of the process combination is evaluated by comparing it to the conventional purely CNC approach. The form accuracy, surface finish, mechanical properties and tool wear for the two processes are also compared.

The results show that the process combination can be used to produce Ti components that adhere to aerospace standards. With the process combination, a material saving of 87 per cent was achieved along with a reduction of 21 per cent in machining time. Further improvements are possible using optimized SLM build and machining strategies.

This paper presents the results of a resource efficiency assessment on the combination of SLM and 5-axis CNC milling for the titanium alloy, Ti6Al4V. It is expected that this process combination can make a significant contribution towards reducing material wastage and machining time for aerospace applications.

The main aim of the paper is the application of the selective laser sintering (SLS) method for fabrication of hydrodynamic torque converter (HTC) impellers.

Establishing of assumptions for the impeller design process based on the HTC characteristics analysis, creation of the virtual solid model of HTC impellers, fabrication of HTC impellers by using the SLS method, investigation of the performance of HTC with fabricated impellers by using a test rig.

The test results show that the SLS method can be successfully used for the fabrication of HTC impellers with 3D and flat blades.

The method application is limited to small diameters of HTC impellers depending on working area dimensions of SLS machine.

The method can decrease the time and cost of fabrication of HTC impellers by using the SLS method.

The application of the SLS method for fabrication of HTC impellers with 3D and flat blades.

This study aims to examine the imagining of libraries and the depiction of library services in contemporary science fiction novels. Analyses of libraries in contemporary science fiction may reveal expectations of libraries and the roles they play in future societies. These may, in turn, be used by the library profession to innovate and to discover opportunities to design and improve library services that meet the expectations of library users now and in the future.

This research applied a content analysis approach to examine references to libraries in a purposeful sample of science fiction novels published between 2009 and 2019. The sample consists of 29 novels selected from the 2010–2020 winners of the Hugo Award for Best Novel, The Nebula Award for Best Novel, the Locus Award for Best Science Fiction Novel, The Philip K Dick Award and the Arthur C Clarke Award.

This research finds that libraries are a common feature within contemporary science fiction novels, primarily as part of the background setting of the narratives. Libraries are particularly common in peri-apocalyptic novels, often as “reinvented” libraries. This research identifies considerable differences in the way libraries and information access and use are depicted and documented in science fiction worlds of plenty, compared to those of scarcity. Other key themes discussed include freedom of access to information, and the supposedly common negative stereotyping of libraries.

Existing literature indicates anxiety about the future of libraries which the findings of this research do not support. The insights gained suggested instead, the emergence of an image of libraries as being embedded in the fabric of societies. This indicates the expectation of the place and role of libraries in contemporary societies. Libraries and their services must be adeptly placed and woven into the many facets of the societies they serve.

Population ageing, coupled with economic uncertainty and a shifting workforce structure, has directed the attention of public and organizational policy makers toward the potential contribution of older workers and skilled migrants in meeting labor supply shortages in ageing populations. This chapter presents labor supply and demand scenarios for 10 OECD countries and examines trends in the labor force participation of older workers against the backdrop of changes to the nature of work in an era of globalization, casualization, and, increasingly, automation. Brief analysis of each country’s situation and policy responses indicates that China, Japan, and Korea stand out as being at particular risk of being unable to maintain growth without undertaking drastic action, although their areas of focus need to differ. A limitation of the study is that GDP projections used in labor demand analysis were based on historical rates and represented past potential and a long-run average of historic economic output. Future research might also undertake comparative analysis of case studies addressing different potential solutions to workforce ageing. A key implication of the study is that there is a need to take a blended approach to public policy regarding older workers in a changing labor market. Where migration has historically been a source of labor supplementation, this may become a less viable avenue over the near future. Future shortfalls in labor imply that economies will increasingly need to diversify their sources of workers in order to maintain economic growth. For public policy makers the challenge will be to overcome public antipathy to migration and longer working lives.

This paper aims to focus on collaborative consumption, that is, the peer-to-peer (P2P) exchange of goods and services facilitated by online platforms. Anchored in the access paradigm, collaborative consumption (e.g. accommodation rental and ridesharing services) differs from commercial services offered by firms (e.g. business-to-customer [B2C] carsharing). The aim of this study is to examine the nuanced styles of collaborative consumption in relation to market-mediated access practices and socially mediated sharing practices.

Following the general research trend on mobility services, the context of long-distance ridesharing is chosen. Data collection was conducted using participant observation as peer service provider, 11 ethnographic interviews of consumers and a netnographic study of digital artifacts.

Using practice theory, ten ridesharing activities were identified. These activities and the nuances in the procedures, understandings and engagements in the ridesharing practice led to the distinction of three styles of collaborative consumption: communal collaborative consumption, which is when participants seek pro-social relationships in belonging to a community; consumerist collaborative consumption, performed by participants who seek status and convenience in the access lifestyle; and opportunistic collaborative consumption, when participants seek to achieve monetary gain or personal benefits from abusive activities.

By taking a phenomenological approach on collaborative consumption, this study adds to the understanding of the sharing economy as embedded in both a utilitarian/commercial economic system and a non-market/communal social system. The three styles of collaborative consumption propose a framework for future studies differentiating P2P exchanges from other practices (i.e. B2C access-based services and sharing).

At the turn of the 20th-century railroad regulation was hotly debated in the United States. Railways were accused of abusing of their monopolistic position, in particular by discriminating rates. Public opinion’s pressure for tighter regulation led to the 1906 enactment of the Hepburn Act, which strengthened the powers of the Interstate Commerce Commission. American economists actively participated in the debate. While most of them sided with the pro-regulation camp, the best economic analysis came from those who used the logic of modern law and economics to demonstrate how most railroads’ practices, including rate discrimination, were simply rational, pro-efficiency behavior. However, as relatively unknown Chicago University economist Hugo R. Meyer would discover, proposing that logic in public events could at that time cost you your academic career.

If moments of historical rupture create spaces for social change, what emerges to fill those gaps? This article approaches this question by exploring the creation of the “domestic” in 17th century Europe and Asia following the decline of the Spanish Habsburgs in the West and the Ming Dynasty in the East. Two events will serve as lenses through which that process will be explored. The first case centers on arguments for the legitimacy of the 1603 Dutch seizure of a Portuguese carrack in what would serve as the basis for Hugo Grotius’s defense of the free seas. The second debate focuses on the appropriate mourning ritual following the 1659 death of King Hyojong, the 17th ruler in Korea’s Choson dynasty. I argue that, in the process of responding to the crises they faced in their environments, social elites in both cases defined and articulated a conception of themselves as sovereign societies, creating a political space and corporate identity distinct from the extant institutional apparatus of the state and cultural framework of the nation.

Bitcoin’s introduction as the first cryptoasset in 2009 ushered in a new era, representing a seismic shift in the financial markets. Since then, this evolving asset class has generated much interest, excitement, and growth. This chapter begins by providing a brief background of cryptoassets. It then discusses their main types (cryptocurrencies, security tokens, and utility tokens), users (individual investors, major financial institutions, endowments, and hedge funds), and benefits and drawbacks. Next, it sets forth the book’s purpose, distinguishing features, intended audience, and structure. The chapter provides a synopsis of each of the remaining 21 chapters. Although no single book can encompass all changes and iterations of these technologies as they emerge in the marketplace, this book brings together a broad collection of industry expertise and academic analysis to create a book helpful to researchers, academics, and practitioners.

Almost all libraries collect fiction. Of course the nature, scope, and organization of the collection varies with the type of library and its clientele. In this column scholars, fans, and just plain readers of diverse fiction formats, types, and genres will explore their specialty with a view to the collection building needs of various types of libraries. In addition to lists of “good reads,” authors not to be missed, rising stars, and rediscovered geniuses, columnists will cover major critics, bibliographies, relevant journals and organizations, publishers, and trends. Each column will include a genre overview, a discussion of access to published works, and a core collection of recommended books and authors. Janice M. Bogstad leads off with a discussion of science fiction. In the next issue of Collection Building, Ian will focus her discussion on the growing body of feminist science fiction with an article entitled, “Redressing an Interval Balance: Women and Science Fiction, 1965–1983.” Issues to follow will feature Kathleen Heim on thrillers, and Rhea Rubin reviewing short story collection building. Should you care to suggest an area or aspect of fiction collection building for discussion or try your hand as a columnist contact the column editor through Neal‐Schuman Publishers.