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Article
Publication date: 15 August 2016

Lindsey Bass, Nicholas Alexander Meisel and Christopher B. Williams

Understanding how material jetting process parameters affect material properties can inform design and print orientation when manufacturing end-use components. This study aims to…

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Abstract

Purpose

Understanding how material jetting process parameters affect material properties can inform design and print orientation when manufacturing end-use components. This study aims to explore the robustness of material properties in material jetted components to variations in processing environment and build orientation.

Design/methodology/approach

The authors characterized the properties of six different material gradients produced from preset “digital material” mixes of polypropylene-like (VeroWhitePlus) and elastomer-like (TangoBlackPlus) materials. Tensile stress, modulus of elasticity and elongation at break were analyzed for each material printed at three different build orientations. In a separate ten-week study, the authors investigated the effects of aging in different lighting conditions on material properties.

Findings

Specimens fabricated with their longest dimension along the direction of the print head travel (X-axis) tended to have the largest tensile strength, but trends in elastic modulus and elongation at break varied between the rigid and flexible photopolymers. The aging study showed that the ultimate tensile stress of VeroWhitePlus parts increased and the elongation decreased over time. Material properties were not significantly altered by lighting conditions.

Research limitations/implications

Many tensile specimens failed at the neck region, especially for the more elastomeric parts. It is hypothesized that this is due to the material jetting process approximating curves with a pixelated droplet arrangement, instead of curved contour as seen in other additive manufacturing processes. A new tensile specimen design that performs more consistently with elastomer-like materials should be considered. The aging component of this study is focused solely on polypropylene-like (VeroWhitePlus) material; additional research into the effects of aging on multiple composite materials is needed.

Originality/value

The study provides the first known description of orientation effects on the mechanical behavior of photopolymers containing varied concentrations of elastomeric (TangoBlackPlus) material. The aging study presents the first findings on how time affects parts made via material jetting.

Details

Rapid Prototyping Journal, vol. 22 no. 5
Type: Research Article
ISSN: 1355-2546

Keywords

Available. Content available
Book part
Publication date: 2 June 2020

Dionne V. McLaughlin

Free Access. Free Access

Abstract

Details

Personalized Principal Leadership Practices
Type: Book
ISBN: 978-1-78973-635-9

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Book part
Publication date: 30 June 2016

Ho Kwan Cheung, Eden King, Alex Lindsey, Ashley Membere, Hannah M. Markell and Molly Kilcullen

Even more than 50 years after the Civil Rights Act of 1964 prohibited discrimination toward a number of groups in employment settings in the United States, workplace…

Abstract

Even more than 50 years after the Civil Rights Act of 1964 prohibited discrimination toward a number of groups in employment settings in the United States, workplace discrimination remains a persistent problem in organizations. This chapter provides a comprehensive review and analysis of contemporary theory and evidence on the nature, causes, and consequences of discrimination before synthesizing potential methods for its reduction. We note the strengths and weaknesses of this scholarship and highlight meaningful future directions. In so doing, we hope to both inform and inspire organizational and scholarly efforts to understand and eliminate workplace discrimination.

Details

Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-78635-263-7

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Book part
Publication date: 8 December 2016

Izhar Oplatka

This chapter focuses on a proposed framework of irresponsible leadership (IRL) that might emerge in our schools under certain circumstances. A second purpose is to analyze…

Abstract

This chapter focuses on a proposed framework of irresponsible leadership (IRL) that might emerge in our schools under certain circumstances. A second purpose is to analyze potential ways to prevent its rise, based on previous models of educational leadership. Broadly, IRL is composed of five elements: narrow view of education, a business-like view of the teacher–student relations, a Narcissist and ego-centrist view, self-centered decision making, and emotional unawareness and poor emotion regulation. Unsurprisingly, IRL results in decreased levels of teachers’ and students’ well-being, unethical school climate, a lack of social responsibility in the teacher lounge, and school failure. To prevent these and related results, three major leadership models in education – participative, moral and social justice, and instructional – were analyzed.

Details

The Dark Side of Leadership: Identifying and Overcoming Unethical Practice in Organizations
Type: Book
ISBN: 978-1-78635-499-0

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Article
Publication date: 8 March 2011

M. Birasnav, S. Rangnekar and A. Dalpati

In order to achieve sustained competitive advantage through developing human capital, organizations, apart from human resource management practices, concentrate on developing…

18417

Abstract

Purpose

In order to achieve sustained competitive advantage through developing human capital, organizations, apart from human resource management practices, concentrate on developing transformational leaders and implementing knowledge management (KM). To take part in their efforts, this paper intends to explore leadership and KM literatures to examine the interrelationship between transformational leadership, KM, and employee‐perceived human capital creation or benefits.

Design/methodology/approach

A systematic literature review is carried out of traditional and contemporary theoretical and empirical research studies to support the nexus of interrelationship between transformational leadership, KM, and human capital. This review is mainly integrated using a model and propositions that relate transformational leadership and KM with human capital benefits.

Findings

Transformational leaders have potential to affect their employees' perceptions of human capital benefits. They also have the greatest potential to augment these benefits through involving them in the KM process, establishing organizational culture, and encouraging communication among employees.

Research limitations/implications

This model suggests that human resource managers should provide training to managers with regard to developing transformational leadership behavior, since this behavior contributes to human capital creation by which an organization achieves competitive advantage. Furthermore, this study mainly focuses on leaders as transformational leaders, since these leaders are highly capable of stimulating their followers' creativity. Therefore, this study only considered the components described by Bass and Avolio.

Originality/value

This paper contributes to leadership literature by adding the notion of transformational leadership as an antecedent of human capital creation.

Details

Leadership & Organization Development Journal, vol. 32 no. 2
Type: Research Article
ISSN: 0143-7739

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Article
Publication date: 8 January 2018

Hae Jin Chung and Moon Young Kang

The purpose of this paper is to investigate how the venture capital industry evolves in Korea. The paper also compares the venture capital industry growth of Korea with that of…

695

Abstract

Purpose

The purpose of this paper is to investigate how the venture capital industry evolves in Korea. The paper also compares the venture capital industry growth of Korea with that of the USA.

Design/methodology/approach

This paper forecasts the growth of the Korean venture capital industry using the Bass Model. The authors apply the Bass Model to both Korean and US data to compare the model estimates of Korean and US data, and to make use of the US case by taking the “guess by similarity” approach to analyze Korean venture capital industry growth.

Findings

The authors find that the innovative fund inflows in Korea are stronger than those in the USA, while inertial reinvestments are weak. The study forecasts that new investments in Korea grow at a 5-7 percent rate each year for the next five years, and the growth rate slows down over time. Peak investment is predicted around the year 2030.

Practical implications

Based on the forecasted venture capital investment schedule each year, this study derives the fundraising schedule and the implications for Korea fund-of-funds management to match the investment schedule.

Originality/value

The model estimates provide a guideline for forecasting venture capital industry development in countries with brief histories of venture capital, which lack data. The analysis can also be applied to cases when developing countries and emerging financial markets assess the impact of government interventions on venture capital industry growth, especially when they provide fund-of-funds.

Details

Managerial Finance, vol. 44 no. 1
Type: Research Article
ISSN: 0307-4358

Keywords

Available. Open Access. Open Access
Article
Publication date: 15 January 2021

Sinem Konuk and Barry Z. Posner

This study investigated the effectiveness of a student leadership program at Yildiz Technical University (Turkey) based on the Kouzes and Posner (2018) leadership model. A…

490

Abstract

This study investigated the effectiveness of a student leadership program at Yildiz Technical University (Turkey) based on the Kouzes and Posner (2018) leadership model. A quantitative quasi-experimental design with a pre-test and post-test control group demonstrated the effectiveness of the program. The analysis indicated a positive change for all five leadership practices, with three reaching statistical significance levels. Semi- structured interviews with students explored the two non-significant findings. The qualitative results suggested that leadership development programs need learning activities that apply to real-life situations and focusing on enhancing students’ self-confidence as leaders.

Details

Journal of Leadership Education, vol. 20 no. 1
Type: Research Article
ISSN: 1552-9045

Available. Open Access. Open Access
Article
Publication date: 15 July 2019

Kevan W. Lamm, Nekeisha L. Randall, Alexa J. Lamm and Hannah S. Carter

Policy leadership infiltrates the lives of citizens everywhere. Though this type of leadership is implicit and ubiquitous, a theoretically-based model specifically intended for…

186

Abstract

Policy leadership infiltrates the lives of citizens everywhere. Though this type of leadership is implicit and ubiquitous, a theoretically-based model specifically intended for policy leaders is not readily available in academic literature. This article serves to address this gap by proposing a conceptual model of the policy leadership framework. The model expounds upon previous literature and identifies 16 areas vital to the policy process. Implications of the model relate to equipping leadership educators in the classroom and in the community with enhanced policy leadership research and curriculum.

Details

Journal of Leadership Education, vol. 18 no. 3
Type: Research Article
ISSN: 1552-9045

Available. Open Access. Open Access
Article
Publication date: 15 January 2021

Cameron C. Beatty, Erica R. Wiborg, Brittany Brewster and Julie B. LeBlanc

Few studies explore post-collegiate leadership applications of alumni who complete curricular leadership programs, like minors or certificates. How can we, as a field, say our…

96

Abstract

Few studies explore post-collegiate leadership applications of alumni who complete curricular leadership programs, like minors or certificates. How can we, as a field, say our leadership programs and courses integrate beyond the boundaries of campus or undergraduate life without an understanding of post-collegiate leadership applications? This study explored the leadership learning of alumni of an undergraduate academic leadership certificate in the southeast United States. The researchers employed a qualitative, single, embedded case study design and data collection for this study. The study primarily relied on in-depth interviews, utilizing an interview guide approach (Johnson & Christensen, 2014). The interview guide’s purpose was to focus interviews on topics related to students’ learning and current applications of program learning outcomes. This study’s findings highlighted the practice of reflection for alumni, appreciation for collaboration and building relationships, and how alumni could connect and apply their past leadership coursework to their current professional or personal leadership experiences. The researchers were interested in exploring how leadership learning in higher education contributed to students’ success in their careers, personal life, and community.

Details

Journal of Leadership Education, vol. 20 no. 1
Type: Research Article
ISSN: 1552-9045

Available. Content available
Book part
Publication date: 2 December 1997

Abstract

Details

Communicating Research
Type: Book
ISBN: 978-1-84950-799-8

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