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…
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.
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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.
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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.
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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…
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.
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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…
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.
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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…
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.
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…
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.
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…
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.