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1 – 10 of 21Walter Holweger, Frank Walther, Jörg Loos, Marcus Wolf, Jürgen Schreiber, Werner Dreher, Norbert Kern and Steffen Lutz
Bearings in field applications with high dynamic loading, e.g. wind energy plants, suffer from sudden failure initiated by subsurface material transformation, known as white…
Abstract
Purpose
Bearings in field applications with high dynamic loading, e.g. wind energy plants, suffer from sudden failure initiated by subsurface material transformation, known as white etching cracks in a typical scale of μm, preferably around the maximum Hertzian stress zone. Despite many investigations in this field no precise knowledge about the root cause of those failures is available, due to the fact that failure under real service conditions of wind energy plants differs from what is known from test rig results in terms of contact loading, lubrication or dynamics. The purpose of this paper is to apply Barkhausen noise measurement to a full bearing test ring running under conditions of elastohydrodynamic lubrication (EHL) with high radial preload.
Design/methodology/approach
Full bearing tests are carried out by use of DGBB (Deep Grove Ball Bearings) with 6206 specification, material set constant as 100Cr6, martensitic hardening, 10‐12 percent maximum retained austenite and radial preload of 3500 MPa. Speed is set 9000 rpm, temperature is self setting at 80°C by test conditions. For tests, synthetic hydrocarbon base oil (Poly‐α‐Olefine) with a 1 percent amount of molydenum‐dithiophosphate (organic chain given as 2‐ethylhexyl) was used.
Findings
Non‐destructive fractal dimension analyses by use of Barkhausen noise measurements is of versatile value in terms of recording bearing manufacturing processes, but can also be part of non‐destructive condition monitoring of bearings in field applications, where predictive reactive maintenance is crucial for availability of the plant.
Research limitations/implications
Barkhausen noise signal recording may also be valuable for case studies related to microstructure changes of steel under operation conditions. Bearings are exposed in plenty of conditions to phenomena such as straying currents, subsequently straying magnetic fields. Hardly anything is known about how microstructure of bearing steel is susceptible to such conditions. This will be part of further studies.
Originality/value
Results given in the paper show that sudden bearing failure, according to formation of subsurface material property changes might be driven by activities of dislocations. Since those activities start with sequences of stress field‐induced formation of domains, later by formation of low‐angle subgrains, and at least phase transformation, recording of the Barkhausen signal would lead to real predictive condition monitoring in applications where a highly dynamic loading of the contact, even with low nominal contact pressure leads to sudden failure induced by white etching.
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Research on mentorship has been dominated by the West and little is known about the cultural variations of the mentoring phenomenon in Asian countries. A richer understanding of…
Abstract
Research on mentorship has been dominated by the West and little is known about the cultural variations of the mentoring phenomenon in Asian countries. A richer understanding of the cultural context that is more attuned to mentoring experience in Asia can help to improve workplace experience, in general, for those working in and for those who intend to work in the region. This chapter captures the important theoretical lenses in the mentoring literature, and also provides a clear demarcation between negative mentoring and dysfunctional mentoring. This is followed by contextualizing mentoring as per four of Hofstede's six cultural dimensions by dwelling on mentoring experience in countries such as China, India, Pakistan, Japan, South Korea and Taiwan. It is hoped that this chapter will pave the way for further research, which may be a precursor for theory development.
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James M. Kohlmeyer, Robert J. Parker and Terry Sincich
As proposed in this paper, in public accounting firms, supervisors and managers provide junior accountants with career-related benefits that include: career development support;…
Abstract
As proposed in this paper, in public accounting firms, supervisors and managers provide junior accountants with career-related benefits that include: career development support; social support; and role modeling. Also, employees who receive such career-related benefits are more likely to believe that the firm provides career growth opportunities and more likely to trust their managers. Career growth opportunities and trust, in turn, positively affect organizational commitment, which reduces turnover intentions. In summary, the relation between career benefits and turnover is mediated by several variables: career growth opportunities, trust in managers, and organizational commitment. Results of a survey of junior employees in public accounting firms support these assertions (with the exception of social support).
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Susan Durbin, Ana Lopes, Stella Warren and Judith Milne
The alta mentoring platform, launched within the aviation and aerospace industry in 2019, is the outcome of a joint knowledge exchange project between academics and industry. It…
Abstract
The alta mentoring platform, launched within the aviation and aerospace industry in 2019, is the outcome of a joint knowledge exchange project between academics and industry. It was designed and launched to meet the mentoring needs of women in this male dominated industry, who otherwise had no, or very little, mentoring support. The aim of alta was to create an on-line mentoring platform that was based upon the mentoring support that women identified as being important and that would address their under-representation and the lack of support for career progression. The chapter draws upon a body of literature focussing upon mentoring, specifically its meanings (see Dashper, 2018), benefits (see Phillips et al., 2016) and barriers (see Eby et al., 2010); as well as gender specific mentoring (see Johns & McNamara, 2014). The authors adopt a feminist relational mentoring framework (Ragins, 2016), that views mentoring as a two-way process where mentors and mentees learn from each other. The project was under-pinned by six months of research across the industry (a survey, interviews and focus groups with professional women and employers) to ascertain the need for the mentoring platform. This chapter is based upon four focus groups held with women across the industry, in both technical and middle/senior managerial roles, to ascertain their experiences of mentoring and their perceived and experienced benefits and barriers to mentoring. The focus groups were also utilised to find out specifically what women wanted from the alta mentoring platform and their views on its women-only focus.
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The authors aim to examine the relationship between home bias and globalization while specifically examining the effects of the different dimensions of globalization (social…
Abstract
Purpose
The authors aim to examine the relationship between home bias and globalization while specifically examining the effects of the different dimensions of globalization (social, economic and political) for both developed countries and developing countries. Additionally, the authors test the effect of globalization regulation and laws against actual globalization activities.
Design/methodology/approach
This study investigates the influence of globalization on the home bias phenomenon using a panel regression and a three-dimensional globalization index (social, economic and political globalization) of 42 developed and developing countries from 2001 to 2016.
Findings
The results show that globalization significantly reduces home bias. In addition, the authors find that social globalization has a key influence compared to economic globalization and that political globalization has the weakest effect. For developing economies only, economic globalization as well as globalization laws and regulations have a crucial impact on the level of home bias.
Originality/value
Prior studies focus merely on the aspect of financial integration. Our study provides a more comprehensive outlook by distinguishing between the features of globalization (social, economic and political) as well as the actual globalization activities (de facto) compared to the laws and regulations enabling those actives (de jure). Lauterbach and Reisman (2004) show that globalization reduces home bias through a theoretical model. This study provides empirical merit to their work. In addition, we examine the different aspects of globalization for both emerging and developed markets.
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Marianne Snow and Margaret Robbins
This article examines, elementary leveled graphic history, a genre of literature relatively untouched by research. Due to graphic nonfiction’s growing popularity in the realm of…
Abstract
This article examines, elementary leveled graphic history, a genre of literature relatively untouched by research. Due to graphic nonfiction’s growing popularity in the realm of children’s literature and its potential benefits for young readers, teachers may want to incorporate this genre of literature into their social studies curriculum. Despite the genre’s appeal, educators should be careful when introducing graphic histories to their students, as nonfiction texts of any kind can possibly contain inaccuracies and biases that might foster misconceptions. In this study, we used a critical content analysis approach to investigate both images and text in four graphic histories on the Battle of the Alamo. We found these books contain several instances of factual errors and biased perspectives. After our analyses, we discussed implications for using these types of books in the classroom to help students enhance critical literacy skills. We connected recommended critical literacy activities to Common Core State Standards for informational texts and writing.
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Scanning both the academic and popular business literature of the last 40 years puzzles the alert reader. The variety of prescriptions of how to be successful (effective…
Abstract
Scanning both the academic and popular business literature of the last 40 years puzzles the alert reader. The variety of prescriptions of how to be successful (effective, performing, etc.) 1 Organizational performance, organizational success and organizational effectiveness will be used interchangeably throughout this paper.1 in business is hardly comprehensible: “Being close to the customer,” Total Quality Management, corporate social responsibility, shareholder value maximization, efficient consumer response, management reward systems or employee involvement programs are but a few of the slogans introduced as means to increase organizational effectiveness. Management scholars have made little effort to integrate the various performance-enhancing strategies or to assess them in an orderly manner.
This study classifies organizational strategies by the importance each strategy attaches to different constituencies in the firm’s environment. A number of researchers divide an organization’s environment into various constituency groups and argue that these groups constitute – as providers and recipients of resources – the basis for organizational survival and well-being. Some theoretical schools argue for the foremost importance of responsiveness to certain constituencies while stakeholder theory calls for a – situation-contingent – balance in these responsiveness levels. Given that maximum responsiveness levels to different groups may be limited by an organization’s resource endowment or even counterbalanced, the need exists for a concurrent assessment of these competing claims by jointly evaluating the effect of the respective behaviors towards constituencies on performance. Thus, this study investigates the competing merits of implementing alternative business philosophies (e.g. balanced versus focused responsiveness to constituencies). Such a concurrent assessment provides a “critical test” of multiple, opposing theories rather than testing the merits of one theory (Carlsmith, Ellsworth & Aronson, 1976).
In the high tolerance level applied for this study (be among the top 80% of the industry) only a handful of organizations managed to sustain such a balanced strategy over the whole observation period. Continuously monitoring stakeholder demands and crafting suitable responsiveness strategies must therefore be a focus of successful business strategies. While such behavior may not be a sufficient explanation for organizational success, it certainly is a necessary one.
The purpose of this paper is to examine the ways for the formulation of a model for calculating the cost of corruption per country, taking into account the social cost.
Abstract
Purpose
The purpose of this paper is to examine the ways for the formulation of a model for calculating the cost of corruption per country, taking into account the social cost.
Design/methodology/approach
The methodology is practical exploration; the model is formulated along with the social cost of specific calculation. Based on two specific acts of corruption, bribery and overpricing of public works, these acts are private and public corruption. From there, the model is formulated along with the social cost of specific calculation, based on two specific acts of corruption, bribery and overpricing of public works.
Findings
This paper concludes that the model is applicable to all the countries of the world, based on their tax structure.
Research limitations/implications
Limitations do not exist in the model; the additional implications are the extension of the model. The model can be used for local governments or countries.
Practical implications
Countries can calculate the theoretical cost of corruption in their local, regional or national economies, based on two specific acts of corruption, in political, private and public corruption; bribery and overpricing of public works.
Social implications
The social implications include knowing the theoretical cost of corruption and their effects.
Originality/value
The model calculates the cost of corruption and its economic and social impact.
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Given the ways in which the research pressures on university staff are becoming seemingly ever greater, an issue of the European Journal of Marketing that is given over to a…
Abstract
Given the ways in which the research pressures on university staff are becoming seemingly ever greater, an issue of the European Journal of Marketing that is given over to a survey of the kinds of research initiatives which are currently being carried out is timely. The study which provides the basis for this was conducted between December 1994 and February 1995, with questionnaires being sent to staff in universities throughout Europe. At the time the final selection was made, a total of 150 responses had been received from 18 countries.