Nicholas R. Fry, Robert C. Richardson and Jordan H. Boyle
This paper aims to present a multi-axis additive robot manufacturing system (ARMS) and demonstrate its beneficial capabilities.
Abstract
Purpose
This paper aims to present a multi-axis additive robot manufacturing system (ARMS) and demonstrate its beneficial capabilities.
Design/methodology/approach
ARMS was constructed around two robot arms and a fused filament fabrication (FFF) extruder. Quantitative experiments are conducted to investigate the effect of printing at different orientations with respect to gravity, the effect of dynamically changing build orientation with respect to the build tray when printing overhanging features, the effect of printing curved parts using curved, conformal layers. These capabilities are combined to print an integrated demonstrator showing potential practical benefits of the system.
Findings
Orientation with respect to gravity has no effect on print quality; dynamically changing build orientation allows overhangs up to 90° to be cleanly printed without support structures; printing an arch with conformal layers significantly increases its strength compared to conventional printing.
Research limitations/implications
The challenge of automatic slicing algorithms has not been addressed for multi-axis printing. It is shown that ARMS could eventually enable printing of fully-functional prototypes with embedded components.
Originality/value
This work is the first to prove that the surface roughness of an FFF part is independent of print orientation with respect to gravity. The use of two arms creates a novel system with more degrees of freedom than existing multi-axis printers, enabling studies on printing orientation relationships and printing around inserts. It also adds to the emerging body of multi-axis literature by verifying that curved layers improve the strength of an arch which is steeply curved and printed with the nozzle remaining normal to the curvature.
Details
Keywords
Amal Ahmadi, Bernd Vogel and Claire Collins
We take an affect-based approach to theoretically introduce and explore the knowing-doing gap of leadership. We focus on the emotion of fear that managers may experience in the…
Abstract
Purpose
We take an affect-based approach to theoretically introduce and explore the knowing-doing gap of leadership. We focus on the emotion of fear that managers may experience in the workplace, and how it may influence the transfer of their leadership knowledge into leadership action.
Methodology/approach
We use Affective Events Theory as our underlying theoretical lens, drawing on emotional, cognitive, and behavioral mechanisms to explain the role of fear in the widening and bridging of the knowing-doing gap of leadership.
Findings
We theoretically explore the interplay between leader fear, the leadership contexts, and the knowing-doing gap of leadership. From this, we develop a multidimensional theoretical framework on the influence of leader fear on the knowing-doing gap of leadership.
We highlight how fear and the knowing-doing gap of leadership may be influenced by and potentially impact on individual managers and their leadership contexts.
Originality/value
Our initial theoretical framework provides a starting point for understanding fear and the knowing-doing gap of leadership. It has implications for future research to enhance our understanding of the topic, and contributes toward existing approaches on leadership development as well as emotions and leadership.
Details
Keywords
The big changes over recent years and their rapid development in Food Retailing have resulted in different shopping practices, for the institution, the hotel, restaurant and the…
Abstract
The big changes over recent years and their rapid development in Food Retailing have resulted in different shopping practices, for the institution, the hotel, restaurant and the home. Different cuisines have developed, foods purchased, both in cooking practices and eating habits, especially in the home. Gone are the old fashioned home economics, taking with them out of the diet much that was enjoyed and from which the families benefitted in health and stomach satisfaction. In very recent times, the changes have become bigger, developments more rapid, and the progress continues. Bigger and bigger stores, highly departmentalised, mechanical aids of every description, all under one roof, “complex” is an appropriate term for it; large open spaces for the housewife with a car. The development is in fact aimed at the bulk buyer — rapid turnover — the small household needs, not entirely neglected, but not specially catered for. Daily cash takings are collosal. This is what the small owner‐occupied general store, with its many domestic advantages, has come to fall in the late twentieth century.
Simon Wakeling, Valerie Spezi, Jenny Fry, Claire Creaser, Stephen Pinfield and Peter Willett
The purpose of this paper is to provide insights into publication practices from the perspective of academics working within four disciplinary communities: biosciences…
Abstract
Purpose
The purpose of this paper is to provide insights into publication practices from the perspective of academics working within four disciplinary communities: biosciences, astronomy/physics, education and history. The paper explores the ways in which these multiple overlapping communities intersect with the journal landscape and the implications for the adoption and use of new players in the scholarly communication system, particularly open-access mega-journals (OAMJs). OAMJs (e.g. PLOS ONE and Scientific Reports) are large, broad scope, open-access journals that base editorial decisions solely on the technical/scientific soundness of the article.
Design/methodology/approach
Focus groups with active researchers in these fields were held in five UK Higher Education Institutions across Great Britain, and were complemented by interviews with pro-vice-chancellors for research at each institution.
Findings
A strong finding to emerge from the data is the notion of researchers belonging to multiple overlapping communities, with some inherent tensions in meeting the requirements for these different audiences. Researcher perceptions of evaluation mechanisms were found to play a major role in attitudes towards OAMJs, and interviews with the pro-vice-chancellors for research indicate that there is a difference between researchers’ perceptions and the values embedded in institutional frameworks.
Originality/value
This is the first purely qualitative study relating to researcher perspectives on OAMJs. The findings of the paper will be of interest to publishers, policy-makers, research managers and academics.