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Article
Publication date: 14 June 2021

Jeffrey B. Allen

In this work, with a goal to ultimately forward the advancement of additive manufacturing research, the author applies the Wheeler-Boettinger-McFadden model through a progressive…

202

Abstract

Purpose

In this work, with a goal to ultimately forward the advancement of additive manufacturing research, the author applies the Wheeler-Boettinger-McFadden model through a progressive series of increasingly complex solidification problems illustrating the evolution of both dendritic as well as columnar growth morphologies. For purposes of convenience, the author assumes idyllic solutions (i.e. the excess energies associated with mixing solid and liquid phases can be neglected).

Design/methodology/approach

In this work, the author applied the phase-field model through a progressive series of increasingly complex solidification problems, illustrating the evolution of both dendritic as well as columnar growth morphologies. Beginning with a non-isothermal treatment of pure Ni, the author further examined the isothermal and directional solidification of Cu–Ni binary alloys.

Findings

(1) Consistent with previous simulation results, solidification simulations from each of the three cases revealed the presence of parabolic, dendrite tips evolving along directions of maximum interface energy. (2) For pure Ni simulations, changes in the anisotropy and noise magnitudes resulted in an increase of secondary dendritic branches and changes in the direction of propagation. The overall shape of the primary structure tended also to elongate with increased anisotropy. (3) For simulations of isothermal solidification of Ni–Cu binary alloys, the development of primary and secondary dendrite arm formation followed similar patterns associated with a pure substance. Calculations of dendrite tip velocity tended to increase monotonically with increasing anisotropy in accordance with previous research. (4) Simulations of directional solidification of Ni–Cu binary alloys with a linear temperature profile demonstrated the presence of cellular dendrites with relatively weak side-branching. The occurrence of solute trapping was also apparent between the primary dendrite columns. Dendrite tip velocities increased with increasing cooling rate.

Originality/value

This research, particularly the section devoted to directional solidification of binary alloys, describes a novel numerical framework and platform for the parametric analysis of various microstructural related quantities, including the effects due to changes in temperature gradient and cooling rate. Both the evolution of the phase and concentration are resolved.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 5
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 2 April 2024

Jeff Allen, Reena Patel, Tomas Mondragon and Oliver Taylor

Among the various applications involving the use of microwave energy, its growing utility within the mining industry is particularly noteworthy. Conventional grinding processes…

49

Abstract

Purpose

Among the various applications involving the use of microwave energy, its growing utility within the mining industry is particularly noteworthy. Conventional grinding processes are often overburdened by energy inefficiencies that are directly related to machine wear, pollution and rising project costs. In this work, we numerically investigate the effects of microwave pretreatment through a series of compression tests as a means to help mitigate these energy inefficiencies.

Design/methodology/approach

We investigate the effects of microwave pretreatment on various rock samples, as quantified by uniaxial compression tests. In particular, we assign sample heterogeneity based on a Gaussian statistical distribution and invoke a damage model for elemental tensile and compressive stresses based on the maximum tensile stress and the Mohr–Coulomb theories, respectively. We further couple the electromagnetic, thermal and solid displacement relations using finite element modeling.

Findings

(1) Increased power intensity during microwave pretreatment results in decreased axial compressive stress. (2) Leveraging statistics to induce variable compressive and tensile strength can greatly facilitate sample heterogeneity and prove necessary for damage modeling. (3) There exists a nonlinear trend to the reduction in smax with increasing power levels, implying an optimum energy output efficiency to create the maximum degradation-power cost relationship.

Originality/value

Previous research in this area has been largely limited to two-dimensional thermo-electric models. The onset of high-performance computing has allowed for the development of high-fidelity, three-dimensional models with coupled equations for electromagnetics, heat transfer and solid mechanics.

Details

Multidiscipline Modeling in Materials and Structures, vol. 20 no. 3
Type: Research Article
ISSN: 1573-6105

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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…

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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.

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

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Book part
Publication date: 6 December 2004

Lawrence Angus is Professor is Head of the School of Education at the University of Ballarat. His most recent book (with Professor Terri Seddon of Monash University) is Reshaping

Abstract

Lawrence Angus is Professor is Head of the School of Education at the University of Ballarat. His most recent book (with Professor Terri Seddon of Monash University) is Reshaping Australian Education: Beyond Nostalgia. His publications include several books over 50 refereed book chapters and articles in academic journals. His particular research and teaching interests include education equity and policy.Eve Gregory is a Professor in the Department of Educational Studies at Goldsmiths’ College, University of London She joined the Department of Educational Studies in 1987, after having taught for nine years in schools and two years at Nene College, Northampton. During her years at Goldsmiths, she has co-ordinated language and literacy programmes for the BA Ed, taught across Early Years programmes and established student exchanges in France, Spain and Austria. Recent research has included studies on family literacy history, on siblings (both funded by the ESRC) and children’s home and school literacy practices (funded by the Leverhulme Trust).Kathleen Gwinner began her career in education as a high school art teacher in rural areas near Kansas City, Missouri and El Paso, Texas, and then in Houston’s urban schools. Travel and a continuing interest in art history prompted her to return to university for a Masters degree in European history, and she subsequently taught history and art history courses at private and public schools with a great variety of student populations. Her doctoral research was conducted at a specialized vocational school within the Houston metropolitan district where she was a teacher. She now teaches at a school for the gifted and talented where she is continuing her research on high achieving girls.Martyn Hammersley is Professor of Educational and Social Research, Faculty of Education and Language Studies, the Open University. His early work was in the sociology of education. Much of his more recent work has been concerned with the methodological issues surrounding social and educational research. He is currently investigating the representation of research findings in the mass media. He has written several books, including: (with Paul Atkinson) Ethnography: principles in practice (Routledge, 1995); The Dilemma of Qualitative Method (Routledge, 1989); Reading Ethnographic Research (Longman, 1998); What’s Wrong with Ethnography? (Routledge, 1992); The Politics of Social Research (Sage, 1995); (with Peter Foster and Roger Gomm) Constructing Educational Inequality (Falmer, 1996); Taking Sides in Social Research (Routledge, 1999); and Educational Research, Policymaking and Practice (Paul Chapman, 2002).Sam Hillyard is a lecturer in sociology at the Institute for the Study of Genetics, Biorisks and Society and a member of Nottingham’s Institute for Rural Research. Her research interests include ethnographic research and theorising; the Sociology of Education; the history of symbolic interactionism and the sociology of Erving Goffman. At Nottingham, she teaches rural sociology and recently finished a research project studying images of farming in children’s literature.Caroline Hudson is Basic Skills Advisor in the Home Office National Probation Directorate. Caroline has published on offending and education, evidence-based policy, and family structure (intact nuclear, reordered nuclear, single parent and care) and young people’s perceptions of family and schooling. Her principal research interest is issues related to social exclusion. Prior to working in the Home Office, Caroline was a researcher at Oxford University Department of Educational Studies and Oxford University Centre for Criminological Research. Before doing a Master’s and doctorate at Oxford University, Caroline was a secondary school English teacher for 12 years.Bob Jeffrey’s ethnographic research at The Open University has focussed on the effects of policy reform and managerialism on the creativity of primary teachers in England. Together with Peter Woods, he has identified their dilemmas and tensions, their creative responses, identity reconstructions, and changes in professional role. He has, together with Geoff Troman, and Dennis Beach, established an extensive European network of ethnographic research interests and his current research project involves ten European partners focussing on the student’s perspectives of their learning experiences with particular reference to their creativity. He has maintained a regular flow of articles concerned with ethnographic methodology.Susi Long is an Associate Professor in Early Childhood Education and Language and Literacy at the University of South Carolina in the U.S. Her research interests include language and literacy learning in marginalized populations and teacher education. In 1997, she received the National Council of Teachers of English (NCTE) Promising Researcher Award for her ethnographic study of cross cultural learning in Iceland. She continues similar work in the United States with projects that include a study of professional development at the University of South Carolina’s Children’s Center, a six month study of Mexican American kindergartners, and a long-term study of new teachers during their first three years of teaching. Key publications can be found in the journals, Research in the Teaching of English; The Journal of Teacher Education; Reading, Language and Literacy; NCTE’s Primary Voices; and in an upcoming issue of the NCTE’s Language Arts. Her most recent work is coedited with Eve Gregory of Goldsmiths College and Dinah Volk of Cleveland State University. The volume, Many Pathways to Literacy (Routledge Falmer, 2004) is a collection of studies that illuminate mediators of language and literacy learning in the lives of young children across a range of cultural settings in the U.S. and in the U.K.Colton Paul worked as a primary school teacher for a number of years in the London Borough of Haringey and Tower Hamlets. He is now employed as a lecturer at Goldsmiths College educational department. Colton Paul is primarily concerned in his research with culture, identity and education, in particular the ways in which notions of race, power, and representation interact to influence cognitive development. his current area of research for his PhD thesis is focused on the effects of mythologies and power relations on the educational development of children of Caribbean heritage.Ilana Snyder is an Associate Professor in the Faculty of Education, Monash University, Australia. Her research focuses on changes to literacy, pedagogical and cultural practices associated with the use of information and communication technologies (ICTs). Four books, Hypertext (Melbourne University Press & New York University Press, 1996), Page to Screen (Allen & Unwin and Routledge, 1997), Teachers and Technoliteracy (Allen & Unwin, 2000), co-authored with Colin Lankshear, and Silicon Literacies (Routledge, 2002) explore these changes. In collaboration with Simon Marginson and Tania Lewis, her current research includes a three-year Australian Research Council-funded project examining the use of ICTs in higher education in Australia. The focus is on innovation at the interface between pedagogical and organisational practices. She is also working on the application of Raymond William’s ideas about technology and cultural form to a study of the Internet.Ruth Silva teaches at the College of Education, University of North Texas having completed her doctorate in teacher education at the University of Houston. She has been a teacher and administrator in high schools in Australia and an administrator with the Department of Education (Independent and Catholic Schools) in Sydney. Her research focuses on the role of the classroom teacher as researcher, instructional supervision, and pre-service teacher education.Katie Van Sluys is a doctoral research student at Indiana University.Ilana Snyder is an Associate Professor in the Faculty of Education, Monash University, Australia. Her research focuses on changes to literacy, pedagogical and cultural practices associated with the use of information and communication technologies (ICTs). Four books, Hypertext (Melbourne University Press & New York University Press, 1996), Page to Screen (Allen & Unwin and Routledge, 1997), Teachers and Technoliteracy (Allen & Unwin, 2000), co-authored with Colin Lankshear, and Silicon Literacies (Routledge, 2002) explore these changes. In collaboration with Simon Marginson and Tania Lewis, her current research includes a three-year Australian Research Council-funded project examining the use of ICTs in higher education in Australia. The focus is on innovation at the interface between pedagogical and organisational practices. She is also working on the application of Raymond William’s ideas about technology and cultural form to a study of the Internet.Wendy Sutherland-Smith is a lawyer turned teacher and an Associate- Lecturer in the Faculty of Business and Law at Deakin University. She has taught in secondary and tertiary institutions for the past fourteen years. Currently, she is teaching Corporations and Business Law to international students, whilst also undertaking doctoral studies in the Faculty of Education at Monash University in Australia. Her Ph.D is a cross-disciplinary investigation of notions of plagiarism, from perspectives of Legal and Literary theory. She is particularly interested in the Internet literacy practices of tertiary undergraduate ESL students. In her doctoral work, Sutherland-Smith is focuses on Bourdieu’s notions of symbolic violence, cultural capital, habitus and field. She applies these critically in analyses of international ESL students’ academic writing, both print-text and Web-text based, with respect to plagiarism and intellectual property. She has published articles in The Reading Teacher (2002), Prospect (2002), and TESOL Journal (2003) on her research of international students’ reading practices in paper-text compared to hyper-text environments. She has also published in the broader area of the nexus between linguistic and legal theory. Her email address is wendyss@deakin.edu.au.Dinah Volk is a Professor and Coordinator of the Early Childhood Program, Cleveland State University, Cleveland, Ohio, USA. She has taught young children in the U.S. and Latin America and her research interests include sibling and peer teaching and the language and literacy practices of young bilingual children and their families. Volk is co-editor, with Gregory and Long, of Many Pathways to Literacy: Young Children Learning with Siblings, Peers, Grandparents, and Communities (RoutledgeFalmer, 2004) and is co-author, with DeGaetano and Williams, of Kaleidoscope: A Multicultural Approach for the Primary School Classroom (Prentice Hall, 1998). Her articles have been published in Research in the Teaching of English, the Journal of Early Childhood Literacy, Reading: Language and Literacy, and the Early Childhood Research Quarterly.Geoffrey Walford is Professor of Education Policy and a Fellow of Green College at the University of Oxford. He was previously Senior Lecturer in Sociology and Education Policy at Aston Business School, Aston University, Birmingham. His recent books include: Affirming the Comprehensive Ideal (Falmer, 1997, edited with Richard Pring), Doing Research about Education (Falmer, 1998, Ed.). Durkheim and Modern Education (Routledge, 1998, edited with W S F Pickering), Policy and Politics in Education (Ashgate, 2000) Doing Qualitative Educational Research (Continuum, 2001) and British Private Schools: Research on policy and practice (Woburn Press, 2003, Ed.). His research foci are the relationships between central government policy and local processes of implementation, choice of schools, private schools, religiously-based schools and ethnographic research methodology. He is editor of the Oxford Review of Education and has recently completed a Spencer Foundation funded comparative project on faith-based schools in England and the Netherlands.Sue Walters completed her DPhil research in the Department of Educational Studies at Oxford University and is now a Research Fellow in the Faculty of Social Sciences, The Open University, Milton Keynes (researching Ethnicities and Contemporary Rural Identities). She was previously a Secondary School English teacher and an English as an Additional Language specialist and has academic degrees in Literature, Women’s Studies and Educational Research Methods. Her current research interests lie in issues concerning academic achievement and Bangladeshi pupils, ethnic minority and bilingual pupil’s experiences of schooling and ethnicities and identities.

Details

Ethnographies of Educational and Cultural Conflicts: Strategies and Resolutions
Type: Book
ISBN: 978-1-84950-275-7

Abstract

Organizational researchers studying well-being – as well as organizations themselves – often place much of the burden on employees to manage and preserve their own well-being. Missing from this discussion is how – from a human resources management (HRM) perspective – organizations and managers can directly and positively shape the well-being of their employees. The authors use this review to paint a picture of what organizations could be like if they valued people holistically and embraced the full experience of employees’ lives to promote well-being at work. In so doing, the authors tackle five challenges that managers may have to help their employees navigate, but to date have received more limited empirical and theoretical attention from an HRM perspective: (1) recovery at work; (2) women’s health; (3) concealable stigmas; (4) caregiving; and (5) coping with socio-environmental jolts. In each section, the authors highlight how past research has treated managerial or organizational support on these topics, and pave the way for where research needs to advance from an HRM perspective. The authors conclude with ideas for tackling these issues methodologically and analytically, highlighting ways to recruit and support more vulnerable samples that are encapsulated within these topics, as well as analytic approaches to study employee experiences more holistically. In sum, this review represents a call for organizations to now – more than ever – build thriving organizations.

Details

Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-80455-046-5

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Population Change, Labor Markets and Sustainable Growth: Towards a New Economic Paradigm
Type: Book
ISBN: 978-0-44453-051-6

Available. Open Access. Open Access
Book part
Publication date: 7 September 2023

Ellen Ernst Kossek, Brenda A. Lautsch, Matthew B. Perrigino, Jeffrey H. Greenhaus and Tarani J. Merriweather

Work-life flexibility policies (e.g., flextime, telework, part-time, right-to-disconnect, and leaves) are increasingly important to employers as productivity and well-being…

Abstract

Work-life flexibility policies (e.g., flextime, telework, part-time, right-to-disconnect, and leaves) are increasingly important to employers as productivity and well-being strategies. However, policies have not lived up to their potential. In this chapter, the authors argue for increased research attention to implementation and work-life intersectionality considerations influencing effectiveness. Drawing on a typology that conceptualizes flexibility policies as offering employees control across five dimensions of the work role boundary (temporal, spatial, size, permeability, and continuity), the authors develop a model identifying the multilevel moderators and mechanisms of boundary control shaping relationships between using flexibility and work and home performance. Next, the authors review this model with an intersectional lens. The authors direct scholars’ attention to growing workforce diversity and increased variation in flexibility policy experiences, particularly for individuals with higher work-life intersectionality, which is defined as having multiple intersecting identities (e.g., gender, caregiving, and race), that are stigmatized, and link to having less access to and/or benefits from societal resources to support managing the work-life interface in a social context. Such an intersectional focus would address the important need to shift work-life and flexibility research from variable to person-centered approaches. The authors identify six research considerations on work-life intersectionality in order to illuminate how traditionally assumed work-life relationships need to be revisited to address growing variation in: access, needs, and preferences for work-life flexibility; work and nonwork experiences; and benefits from using flexibility policies. The authors hope that this chapter will spur a conversation on how the work-life interface and flexibility policy processes and outcomes may increasingly differ for individuals with higher work-life intersectionality compared to those with lower work-life intersectionality in the context of organizational and social systems that may perpetuate growing work-life and job inequality.

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Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-83753-389-3

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Book part
Publication date: 15 July 2019

Johnna Capitano, Kristie L. McAlpine and Jeffrey H. Greenhaus

A core concept of work–home interface research is boundary permeability – the frequency with which elements from one domain cross, or permeate, the boundary of another domain…

Abstract

A core concept of work–home interface research is boundary permeability – the frequency with which elements from one domain cross, or permeate, the boundary of another domain. Yet, there remains ambiguity as to what these elements are and how these permeations impact important outcomes such as role satisfaction and role performance. The authors introduce a multidimensional perspective of work–home boundary permeability, identifying five forms of boundary permeation: task, psychological, role referencing, object, and people. Furthermore, based on the notion that employee control over boundary permeability behavior is the key to achieving role satisfaction and role performance, the authors examine how organizations’ HR practices, leadership, and norms impact employee control over boundary permeability in the work and home domains. The authors conclude with an agenda for future research.

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Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-78973-852-0

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Book part
Publication date: 1 January 2008

Arnold Zellner

After briefly reviewing the past history of Bayesian econometrics and Alan Greenspan's (2004) recent description of his use of Bayesian methods in managing policy-making risk…

Abstract

After briefly reviewing the past history of Bayesian econometrics and Alan Greenspan's (2004) recent description of his use of Bayesian methods in managing policy-making risk, some of the issues and needs that he mentions are discussed and linked to past and present Bayesian econometric research. Then a review of some recent Bayesian econometric research and needs is presented. Finally, some thoughts are presented that relate to the future of Bayesian econometrics.

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Bayesian Econometrics
Type: Book
ISBN: 978-1-84855-308-8

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Book part
Publication date: 4 December 2023

Dewey Cornell

Behavioral threat assessment and intervention is a violence prevention strategy that has become widely used in US schools. Instead of relying on a zero tolerance disciplinary…

Abstract

Behavioral threat assessment and intervention is a violence prevention strategy that has become widely used in US schools. Instead of relying on a zero tolerance disciplinary approach that often leads to school exclusion of students with disabilities, schools can use a multidisciplinary threat assessment team to assess the seriousness and context of a student's behavior and identify appropriate interventions and supports. This process is especially valuable for students with disabilities who are identified as threatening violence. This chapter describes an evidence-based model of threat assessment, the Comprehensive School Threat Assessment Guidelines (CSTAG),1 reviews some common misunderstandings of threat assessment, and presents a case example illustrating the value of threat assessment in preventing school exclusion, and provides services for a student with a disability.

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