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The fused filament fabrication (FFF) process is an additive manufacturing technique used in engineering design. The mechanical properties of parts manufactured by FFF are influenced by the printing parameters. The mechanical properties of rigid thermoplastics for FFF are well defined, while thermoplastic elastomers (TPE) are uncommonly investigated. The purpose of this paper is to investigate the influence of extruder temperature, bed temperature and printing speed on the mechanical properties of a thermoplastic elastomer.

Regression models predicting mechanical properties as a function of extruder temperature, bed temperature and printing speed were developed. Tensile specimens were tested according to ASTM D638. A 3×3 full factorial analysis, consisting of 81 experiments and 27 printing conditions was performed, and models were developed in Minitab. Tensile tests verifying the models were conducted at two selected printing conditions to assess predictive capability.

Each mechanical property was significantly affected by at least two of the investigated FFF parameters, where printing speed and extruder temperature terms influenced all mechanical properties (p < 0.05). Notably, tensile modulus could be increased by 21%, from 200 to 244 MPa. Verification prints exhibited properties within 10% of the predictions. Not all properties could be maximized together, emphasizing the importance of understanding FFF parameter effects on mechanical properties when making design decisions.

This work developed a model to assess FFF parameter influence on mechanical properties of a previously unstudied thermoplastic elastomer and made property predictions within 10% accuracy.

The Equal Pay Act 1970 (which came into operation on 29 December 1975) provides for an “equality clause” to be written into all contracts of employment. S.1(2) (a) of the 1970 Act (which has been amended by the Sex Discrimination Act 1975) provides:

In order to succeed in an action under the Equal Pay Act 1970, should the woman and the man be employed by the same employer on like work at the same time or would the woman still be covered by the Act if she were employed on like work in succession to the man? This is the question which had to be solved in Macarthys Ltd v. Smith. Unfortunately it was not. Their Lordships interpreted the relevant section in different ways and since Article 119 of the Treaty of Rome was also subject to different interpretations, the case has been referred to the European Court of Justice.

Worldwide efforts to identify individuals infected with the hepatitis C virus (HCV) focus almost exclusively on community healthcare systems, thereby failing to reach high-risk populations and those with poor access to primary care. In the USA, community-based HCV testing policies and guidelines overlook correctional facilities, where HCV rates are believed to be as high as 40 percent. This is a missed opportunity: more than ten million Americans move through correctional facilities each year. Herein, the purpose of this paper is to examine HCV testing practices in the US correctional system, California and describe how universal opt-out HCV testing could expand early HCV detection, improve public health in correctional facilities and communities, and prove cost-effective over time.

A commentary on the value of standardizing screening programs across facilities by mandating all facilities (universal) to implement opt-out testing policies for all prisoners upon entry to the correctional facilities.

Current variability in facility-level testing programs results in inconsistent testing levels across correctional facilities, and therefore makes estimating the actual number of HCV-infected adults in the USA difficult. The authors argue that universal opt-out testing policies ensure earlier diagnosis of HCV among a population most affected by the disease and is more cost-effective than selective testing policies.

The commentary explores the current limitations of selective testing policies in correctional systems and provides recommendations and implications for public health and correctional organizations.

Groups typically are composed of members with different knowledge, information, and expertise. Group discussion provides the means by which members can communicate their unique knowledge to reach better group decisions, develop a shared system for remembering and retrieving knowledge, and establish their expertise through enacted performance. In this chapter, three streams of research are reviewed that explore knowledge communication in groups: Hidden profiles, transactive memory systems, and a performative view of expertise. Each of these three research streams complements and informs the other. Across these three research streams, 10 major research findings are identified. We offer three research directions that include integrating these research streams, examining knowledge communication in the context of emerging technology (e.g., artificial intelligence), and studying effects of knowledge diversity in conjunction with surface-level diversity (e.g., member race).

Leaders are important social actors in organizations, centrally involved in establishing and maintaining institutional values, a view that was articulated by Philip Selznick (1957) nearly a half-century ago, but often overlooked in institutionalists’ accounts. Our objective is to build on Selznick’s seminal work to investigate the value proposition of leadership consistent with institutional theory. We examine public interview transcripts from 52 senior executives and discover that leaders’ conceptualizations of their entities align with the archetypes of organization (i.e., economic, hierarchical, and power oriented) and institution (i.e., ideological, creative and collectivist) and cohere around a set of relevant values. Extrapolating from this, we advance a theoretical framework of the process whereby leaders’ claims function as transformational mechanisms of value infusion in the institutionalization of organizations.

The skills that Brandon deployed during the geography game are also skills that help him achieve success in school. These skills include (a) the emotional sensitivity to discern the will of the class in continuing to play, (b) an awareness of what he would have to do to prolong the game, (c) the social sophistication to decide who he wanted to move to his new team, (d) the ability to notice and capitalize on the decision-making processes of others, and, of course, (e) geographic knowledge. These skills are potentially valuable in contexts outside of the community and it is likely that he learned and practiced them there. I observed these skills through his story. Although the list of them is long and impressive, the fact that he was able to alchemize them in the context of school for a purpose he set himself is what made me awestruck.

This article is an extended version of an ‘experts’ briefing' commissioned to inform senior child welfare managers in English local authorities and voluntary agencies about the available evidence to inform the provision of effective services in complex child protection cases. It starts by noting how differences in the approach to service provision in different jurisdictions affect both the nature of research conducted and its transferability across national boundaries. It then summarises the characteristics both of parents who are likely to maltreat their children and also of the children most likely to be maltreated. The factors that make some families ‘hard to engage’ or ‘hard to help/change’ are then discussed, as are the essential elements of effective professional practice in child protection. Particular attention is paid to effective approaches to helping families and young people who are hard to identify or engage.