Jenna Stephanie Walker, John Arnold, Cynthiya Shrestha and Damon Smith
The purpose of this study is to explore the use of silver submicron-scale wire (AgSMW) additives in filament feedstock for fused filament fabrication (FFF) additive manufacturing…
Abstract
Purpose
The purpose of this study is to explore the use of silver submicron-scale wire (AgSMW) additives in filament feedstock for fused filament fabrication (FFF) additive manufacturing technologies. The antibacterial effect of the additive on printed objects is assessed and its impact on mechanical behavior is determined.
Design/methodology/approach
AgSMW-PLA composite FFF filaments were fabricated by solution processing, granulation and extrusion. The reduction in the growth of Escherichia coli (E. coli) is measured after exposure to FFF-printed composite test specimens with AgSMW additive concentrations ranging from 0.0 to 10.0 weight per cent. The effect of the additive addition on the thermal properties and tensile mechanical performance was measured. Scanning electron microscopy (SEM) was used to analyze the composite microstructure and fracture behavior.
Findings
E. coli growth was reduced by approximately 50 per cent at the highest additive concentration of 10.0 weight per cent. This is attributed to the release of silver ions through water diffusion into the bulk of the composite. The ultimate tensile strength declined with increasing AgSMW concentration with a moderate reduction of 18 per cent at 10.0 weight per cent. The elastic modulus did not vary significantly at any of the concentrations studied. The ductility of the composite was only notably reduced at the highest concentration. The reduction in mechanical strength and strain at break is attributed to an increase in void defects in the composite with increasing additive concentration.
Originality/value
This study demonstrates the successful incorporation of AgSMWs into FFF-compatible filaments for use in commercially available printing systems. The results demonstrate significant reduction of bacteria growth when using these materials. While the mechanical performance degrades slightly, the results indicate the material’s efficacy for a variety of potential biomedical applications. As a proof of concept, surgical tools were printed using the composite.
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Lorraine Higham, Alessandra Girardi and Holly Victoria Edwards
Autism-specific characteristics have been associated with internet criminal activities. Internet and non-internet offenders differ on a series of demographic, psychological and…
Abstract
Purpose
Autism-specific characteristics have been associated with internet criminal activities. Internet and non-internet offenders differ on a series of demographic, psychological and offending variables. However, the clinical and criminal presentation of individuals with autism spectrum disorder (ASD) in forensic secure care settings has been underexplored. This paper aims to explore the profiles of internet offenders with ASD admitted to a secure psychiatric unit.
Design/methodology/approach
This study provides the results of a service evaluation of individuals with ASD. The demographic, clinical and criminal characteristics of a small sample of internet offenders with ASD admitted to secure care are described and discussed.
Findings
Internet offenders present in secure care with high rates of comorbid disorders, histories of violence and traumatic experiences, mood disorders and difficulties with relationships. Of the 24 internet offenders discussed, 18 of them committed an offence of a sexual nature involving children.
Originality/value
This paper highlights the potential risks for individuals with ASD in using the internet and the possible difficulties associated with detecting this because of rapid advancements in technology.
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Since Bram Stoker’s tale of Count Dracula struck a chord with a sensation-hungry public, vampires have remained a popular part of horror in cinema. Since the turn of the…
Abstract
Since Bram Stoker’s tale of Count Dracula struck a chord with a sensation-hungry public, vampires have remained a popular part of horror in cinema. Since the turn of the millennium, vampires have now become a mainstay of horror TV. Programmes like True Blood (2008–2014) and The Vampire Diaries (2009–2017) have propelled the vampire into the home.
This chapter will investigate the problematic, but often sympathetic relationship between vampires and humans in The Vampire Diaries.
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When it comes to choosing names, man is at a loss for words. There are far too many Jones's to “keep up with”. Smith is decidedly the most popular surname in Britain and America…
Abstract
When it comes to choosing names, man is at a loss for words. There are far too many Jones's to “keep up with”. Smith is decidedly the most popular surname in Britain and America, but Johnson, Brown, and Miller are prevalent, too. Since the United States of America is a great melting pot, it enjoys a superabundance of names but does not know how to apportion them. Elsdon C. Smith, author of The Story of Our Names, estimates that there are 350,000 different surnames in the United States, but that fifty popular names suffice for ten per cent of the population. Not even a thousand names are required for fifty per cent of the population. In England, fifty common surnames provide for approximately eighteen per cent of the population. So far as appellations are concerned, however, Scotland is the thrifty nation; one hundred and fifty surnames sufficing for more than fifty per cent of all native Caledonians.
Information was obtained in interviews with Richard Nagel in Winter/Spring 2022. This information was supplemented by material from secondary sources. The only information that…
Abstract
Research methodology
Information was obtained in interviews with Richard Nagel in Winter/Spring 2022. This information was supplemented by material from secondary sources. The only information that was disguised were the real names for Bob Crater, Tim Landy, Jane Tolley and Mary Nagel.
The case was classroom tested in Summer 2022. The responses from students helped to shape the writing of the case.
Case overview/synopsis
Richard Nagel, the owner of the RE/MAX Elite real estate agency in Monmouth Beach, New Jersey, has just learned that one of his agents, Tim Landy, quit and left the industry. Tim was a young real estate agent and Richard had spent considerable time training him. Tim was motivated and he worked hard to prospect for business, but he showed that he was experiencing difficulty closing on his sales. Richard decided to recommend that Tim work with another agent, Bob Crater, as Bob was an experienced salesman but was not doing the up-front prospecting that Tim was doing. Richard suggested two different strategies to the two agents – a pairing up arrangement and peer-to-peer learning. The outcome that Richard envisioned was that both of the struggling salesmen would benefit from either of these strategies, but Bob refused to collaborate.
Tim’s quitting was characteristic of an ongoing problem with employee retention that Richard had been experiencing as a manager in recent years. This problem caused Richard to think about how he recruited his real estate agents, how he developed them through coaching and how he motivated them so that they would stay happy in their job and not leave. He recognized the importance of thoroughly examining his retention strategy within the next 12 months so that he could better manage the problem and strengthen the productivity of his real estate agency.
Complexity academic level
The case is intended for an undergraduate course in human resources management, as it deals directly with recruiting, coaching and retaining employees.
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This qualitative study researches the concept of entrepreneurship in an indigenous population by assessing the external and internal challenges entrepreneurs face, discusses the…
Abstract
This qualitative study researches the concept of entrepreneurship in an indigenous population by assessing the external and internal challenges entrepreneurs face, discusses the various types of support offered, and compiles recommendations for partners to understand the Diné entrepreneur. This research interviewed nine enrolled members of the Navajo Nation tribe who have either created businesses on the reservations, managed non-profits aimed at supporting entrepreneurs, or possessed a wealth of entrepreneurial experiences working both on or off the Navajo Nation Reservation. This text builds upon the themes of economic development, cultural-match, and indigenous sovereignty by analyzing the concept, action, and future of Diné entrepreneurship.
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John C. Anderson and Damon M. Fleming
This study investigates whether exposure to a previous client’s earnings management behavior will impact experienced auditors’ judgments of the risk that a current client’s…
Abstract
This study investigates whether exposure to a previous client’s earnings management behavior will impact experienced auditors’ judgments of the risk that a current client’s financial statements are materially misstated. Contrast theory predicts the context of previous information can have a priming effect on a current judgment scenario, where the information for the current judgment is contrasted with the previous information. Guided by contrast theory, we exposed auditors to either positive or negative client ethical earnings management behavior. We found the existence of contrast effects, with the positive (negative) context of the previous client resulting in auditors judging a higher (lower) likelihood of material misstatement in the current client’s financial statements. The results have implications for the effectiveness and efficiency of auditors’ judgments as well as provide insight into auditor training efforts.
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Winifred Aldrich, Brian Smith and Feng Dong
This paper describes research undertaken at the Nottingham Trent University which investigated body movements and their relationship to garment design. The study identifies the…
Abstract
This paper describes research undertaken at the Nottingham Trent University which investigated body movements and their relationship to garment design. The study identifies the difference between ergonomic measuring positions and the natural postures used by real figures in real activities. A new approach to the identification and coding of upper body postures has been made. A body coding system and a simple piece of equipment was designed that enables extended natural body positions to be recorded, thus achieving repeatability. This work enabled comparisons of aesthetic appearance and the functional comfort of women's tailored jackets to be examined.
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Andreja Siliunas, Mario L. Small and Joseph Wallerstein
Today, low-income people seeking resources from the federal government must often work through non-profit organizations. The purpose of this paper is to examine the constraints…
Abstract
Purpose
Today, low-income people seeking resources from the federal government must often work through non-profit organizations. The purpose of this paper is to examine the constraints that the poor must face today to secure resources through non-profit organizations.
Design/methodology/approach
This is a conceptual paper. The authors review cases of non-profit organizations providing federally supported resources to the poor across multiple sectors.
Findings
The authors find that to accept government contracts serving the poor, nonprofit organizations must often engage in one or several practices: reject clients normally consistent with their mission, select clients based on likely outcomes, ignore problems in clients’ lives relevant to their predicament, or undermine client progress to manage funding requirements. To secure government-supported resources from nonprofits, the poor must often acquiesce to intrusions into one or more of the following: their privacy (disclosing sensitive information), their self-protection (renouncing legal rights), their identity (avowing a particular self-understanding) or their self-mastery (relinquishing authority over daily routines).
Originality/value
The authors show that the nonprofits’ dual role as brokers, both liaisons transferring resources and representatives of the state, can complicate their relation to their clients and the predicament of the poor themselves; the authors suggest that two larger trends, toward increasing administrative accountability and demonstrating deservingness, are having both intended and unintended consequences for the ability of low-income individuals to gain access to publicly funded resources.