Search results

1 – 10 of 84
Article
Publication date: 14 January 2014

Timothy J. Horn, Ola L.A. Harrysson, Harvey A. West II, Jeffrey P. Little and Denis J. Marcellin-Little

The aim of this study is to describe an improved experimental substrate for the mechanical testing of patient-specific implants fabricated using direct metal additive…

Abstract

Purpose

The aim of this study is to describe an improved experimental substrate for the mechanical testing of patient-specific implants fabricated using direct metal additive manufacturing processes. This method reduces variability and sample size requirements and addresses the importance of geometry at the bone/implant interface.

Design/methodology/approach

Short-fiber glass/resin materials for cortical bone and polyurethane foam materials for cancellous bone were evaluated using standard tensile coupons. A method for fabricating bone analogs with patient-specific geometries using rapid tooling is presented. Bone analogs of a canine radius were fabricated and compared to cadaveric specimens in several biomechanical tests as validation.

Findings

The analog materials exhibit a tensile modulus that falls within the range of expected values for cortical and cancellous bone. The tensile properties of the cortical bone analog vary with fiber loading. The canine radius models exhibited similar mechanical properties to the cadaveric specimens with a reduced variability.

Research limitations/implications

Additional replications involving different bone geometries, types of bone and/or implants are required for a full validation. Further, the materials used here are only intended to mimic the mechanical properties of bone on a macro scale within a relatively narrow range. These analog models have not been shown to address the complex microscopic or viscoelastic behavior of bone in the present study.

Originality/value

Scientific data on the formulation and fabrication of bone analogs are absent from the literature. The literature also lacks an experimental platform that matches patient-specific implant/bone geometries at the bone implant interface.

Details

Rapid Prototyping Journal, vol. 20 no. 1
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 1 April 2003

Georgios I. Zekos

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some…

89975

Abstract

Aim of the present monograph is the economic analysis of the role of MNEs regarding globalisation and digital economy and in parallel there is a reference and examination of some legal aspects concerning MNEs, cyberspace and e‐commerce as the means of expression of the digital economy. The whole effort of the author is focused on the examination of various aspects of MNEs and their impact upon globalisation and vice versa and how and if we are moving towards a global digital economy.

Details

Managerial Law, vol. 45 no. 1/2
Type: Research Article
ISSN: 0309-0558

Keywords

Article
Publication date: 1 January 2003

Donald P. Roy and Timothy R. Graeff

Perceived fit between a sponsoring brand and an event is considered to be a key sponsorship requirement, but little is known about the variables that are related to perceived fit…

Abstract

Perceived fit between a sponsoring brand and an event is considered to be a key sponsorship requirement, but little is known about the variables that are related to perceived fit. Coca - Cola's sponsorship of the 2002 Salt Lake City Winter Olympics is examined to assess relationships between attitude toward the brand, attitude toward the event, and attitude toward sponsorships and brand/event fit. A telephone survey was used to contact 448 consumers. Results indicate that attitude toward the brand is moderately related to brand/event fit and attitude toward sponsorships is significantly related to brand/event fit.

Details

International Journal of Sports Marketing and Sponsorship, vol. 4 no. 4
Type: Research Article
ISSN: 1464-6668

Keywords

Article
Publication date: 7 August 2017

Xiu Cravens, Timothy A. Drake, Ellen Goldring and Patrick Schuermann

The purpose of this paper is to study the viability of implementing a protocol-guided model designed to provide structure and focus for teacher collaboration from Shanghai in…

Abstract

Purpose

The purpose of this paper is to study the viability of implementing a protocol-guided model designed to provide structure and focus for teacher collaboration from Shanghai in today’s US public schools. The authors examine whether the new model, Teacher Peer Excellence Group (TPEG), fosters the desired key features of productive communities of practice where teachers can jointly construct, transform, preserve, and continuously deepen the meaning of effective teaching. The authors also explore the extent to which existing school conditions – principal instructional leadership, trust, teacher efficacy, and teachers’ sense of school-wide professional community – enable or moderate the desired outcomes.

Design/methodology/approach

Data for this paper are drawn from a series of surveys administered to teachers from 24 pilot schools in six school districts over two school years. Descriptive and multilevel modeling analyses are conducted.

Findings

The findings provide encouraging evidence that, given sufficient support and guidance, teachers report higher levels of engagement in deprivatized practice and instructional collaboration. These findings also hold after controlling for key enabling conditions and school characteristics.

Social implications

The TPEG approach challenges school leaders to take on the responsibilities of helping teachers make their practice public, sharable, and better – three critical objectives in the shift to develop the profession of teaching.

Originality/value

The indication of TPEG model’s positive impact on strengthening the features of communities of practice in selected public schools provides the impetus for further efforts in understanding the transformational changes needed and challenges ahead at the classroom, school, and district levels.

Details

Journal of Educational Administration, vol. 55 no. 5
Type: Research Article
ISSN: 0957-8234

Keywords

Article
Publication date: 8 February 2011

Andrew J. Cobley, Lindsay Edgar, Martin Goosey, Rod Kellner and Timothy J. Mason

Previous studies have proven that, under optimised ultrasonic conditions, a range of materials used in electronic manufacturing can be sonochemically surface modified using benign…

Abstract

Purpose

Previous studies have proven that, under optimised ultrasonic conditions, a range of materials used in electronic manufacturing can be sonochemically surface modified using benign solutions at low temperature. The purpose of this paper is to focus on a specific process, namely, the desmearing of through holes in printed circuit boards (PCB). The objective was to determine whether the introduction of low frequency ultrasound (20 kHz) to the “etch” stage of a standard “swell and etch” desmear system could enable reduced temperature processing and the use of less chemistry in the permanganate solution.

Design/methodology/approach

The study was divided into three main stages. In the first “screening” phase, the effect of ultrasound in the etch solution was studied by measuring the weight loss after desmear on a PCB laminate material (Isola 370HR). Factors such as etch temperature and concentration of permanganate (including permanganate‐free) were varied. In stage 2, confirmatory runs were carried out on the most promising conditions from the screening work and through holes in a four‐layer multi‐layer board (MLB) were assessed for smear removal using a scanning electron microscope (SEM). Finally, a four‐layer MLB was desmeared through the most promising ultrasonic process and then metallized at a PCB manufacturer. Thermal shock testing was subsequently carried out and sections from the board assessed for inter‐connection defects (ICDs).

Findings

The initial screening study indicated that, whenever ultrasound was used in the etch stage of the desmear process, significantly higher weight loss was achieved compared to a standard “silent” process. This effect was most pronounced when permanganate was removed from the etch solution and, in this situation, weight loss could be an order of magnitude higher than the silent equivalent. Further testing on through holes suggested that smear‐free inner‐layers could only be guaranteed if permanganate was present in the etch solution but that ultrasound again improved smear removal. Final testing under semi‐production conditions confirmed that, if ultrasound was employed in the etch part of the desmear process, then a reduction in processing temperature from 85°C to 60°C could be achieved and the permanganate concentration halved (65 to 33 g/L) whilst still achieving ICD‐free boards.

Originality/value

The paper indicates the feasibility of using ultrasound to reduce temperatures and chemical concentrations used in the permanganate etch solution, whilst still producing through holes with no ICDs.

Details

Circuit World, vol. 37 no. 1
Type: Research Article
ISSN: 0305-6120

Keywords

Book part
Publication date: 28 April 2021

Lydia A. Beahm and Bryan G. Cook

The research-to-practice gap occurs when practices supported as effective by research are infrequently used in applied settings, such as classrooms. This gap may be due to…

Abstract

The research-to-practice gap occurs when practices supported as effective by research are infrequently used in applied settings, such as classrooms. This gap may be due to teachers preferring to use practices they find to be trustworthy, usable, and accessible. Instead of relying on research, teachers frequently use resources from other teachers, which may be because teachers prefer practices that are supported by evidence developed in applied settings (i.e., practice-based evidence [PBE]). Using PBE to support the application of evidence-based practices (EBPs) may increase the latter's use in classrooms. In this chapter, we discuss the advantages and disadvantages of both EBPs and PBE and how the two can complement each other to help lessen the research-to-practice gap. We also discuss mixed-methods approaches that can be used to combine EBPs with PBE.

Details

The Next Big Thing in Learning and Behavioral Disabilities
Type: Book
ISBN: 978-1-80071-749-7

Article
Publication date: 12 November 2018

Uchechukwu Nwoke, Collins Chikodi Ajibo and Timothy Okechukwu Umahi

This paper aims to investigate the extent to which the ideology of shareholder value is compatible with that of transformative corporate social responsibility (CSR). It traces the…

Abstract

Purpose

This paper aims to investigate the extent to which the ideology of shareholder value is compatible with that of transformative corporate social responsibility (CSR). It traces the transformation of corporations from quasi-public institutions at inception to purely private enterprises beginning from the middle of the nineteenth century and attempts to locate the ideology of CSR within the wider viewpoint of shareholder value.

Design/methodology/approach

This paper adopts a doctrinal approach through a critical evaluation of the nature and implications of the shareholder value ideology. Using existing literature in the area, it traces the evolution of the shareholder value ideology and how it is antithetical to any meaningful CSR regime.

Findings

The paper finds that there is a fundamental tension between ideas about the desirability of effective CSR and the belief that it is to the benefit of society as a whole for corporations to be run solely in the interest of their shareholders and for managers to seek to maximize shareholder value. This ideological tension renders contemporary CSR ineffective.

Originality/value

The paper offers a fresh insight or analysis into the transformation of corporations from quasi-social institutions to purely private enterprises in the middle of the nineteenth century. It does this by engaging in a historical narrative of the evolution of the corporate form and how contemporary ideas of shareholder value have resulted in the emergence of a contemporary CSR devoid of the radical spirit of CSR in the 1950s and 1960s.

Details

International Journal of Law and Management, vol. 60 no. 6
Type: Research Article
ISSN: 1754-243X

Keywords

Book part
Publication date: 9 December 2016

Fiffy Hanisdah Saikim, Bruce Prideaux, Maryati Mohamed and Zulhazman Hamzah

In Sabah, Malaysia, illegal hunting has increased in recent years putting considerable pressure on large mammal populations. The causes for this phenomenon lie in increasing rural…

Abstract

In Sabah, Malaysia, illegal hunting has increased in recent years putting considerable pressure on large mammal populations. The causes for this phenomenon lie in increasing rural poverty, ineffective policies to regulate hunting, as well as a ready market for many wildlife products in the Chinese medicine markets. This paper examines how Community-Based Ecotourism has some potential to be used as a tool to reducing poaching using the Tidong community in Sabah as a case study. The key finding is that successful conservation outcomes for Community-Based Ecotourism projects are only sustainable over the long run if projects are structured to ensure that the local community is able to continue effective management once sponsoring organizations hand over control and that revenue from tourism does not decline. If tourist revenue declines communities may be forced to revert to previous practices reversing any initial conservation gains.

Details

Advances in Hospitality and Leisure
Type: Book
ISBN: 978-1-78635-615-4

Keywords

Book part
Publication date: 14 November 2014

Robert W. Roeser

The purpose of this paper is to describe the emergence of school-based, secular, mindfulness-based interventions (MBIs) for educators and students that aim to cultivate…

Abstract

Purpose

The purpose of this paper is to describe the emergence of school-based, secular, mindfulness-based interventions (MBIs) for educators and students that aim to cultivate mindfulness and its putative benefits for teaching, learning, and well-being.

Design/methodology/approach

The paper has four sections: (a) a description of indicators of increased interest in mindfulness generally and in education; (b) substantive and functional definitions of mindfulness; (c) rationales for the potential value of mindfulness for teaching, learning, and well-being; and (d) a review of extant research on MBIs for teachers and students in schools.

Findings

On the basis of this review, it is concluded that school-based MBIs represent a promising emerging approach to enhancing teaching, learning, and well-being in schools; but that more research, with more rigorous study designs and measures, need to be done to establish the scientific validity of the effects of school-based MBIs for teachers and students alike.

Details

Motivational Interventions
Type: Book
ISBN: 978-1-78350-555-5

Keywords

Book part
Publication date: 23 November 2020

Timothy J. Fogarty

This chapter questions the contribution of bureaucratic organization to the core missions of the modern university. Although perfectly fit for the execution of peripheral…

Abstract

This chapter questions the contribution of bureaucratic organization to the core missions of the modern university. Although perfectly fit for the execution of peripheral functions, teaching and research do not thrive in such an environment. This accommodation failure has much to do with the many ways the marketplace has crept into our thinking about the function of education and the value of new discovery. Relevant external forces only exacerbate these tendencies. The prospects for emancipation include a resurgence of individuality, perhaps carried by the possibilities of technology which reverses its current capability to standardize and commodify. A more fundamental rethinking of post-secondary education may be needed.

1 – 10 of 84