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1 – 10 of 16Walter 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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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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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.
Walter Holweger, Marcus Wolf, Frank Walther, Werner Trojahn, Annette Mütze, Jan Kunzmann, Jürgen Schreiber, Joachim Mayer and Manuela Reichelt
The purpose of this paper is to show how controlled exposure of electromagnetic fields toward bearing steel vulnerates the microstructure. The ability of Barkhausen Noise signal…
Abstract
Purpose
The purpose of this paper is to show how controlled exposure of electromagnetic fields toward bearing steel vulnerates the microstructure. The ability of Barkhausen Noise signal processing is used for detecting phenomena such as dislocation and subgrain formation processes as the beginning of later failures.
Design/methodology/approach
A Barkhausen noise signal measurement equipment is used for detecting subsurface distress of 100Cr6 as a function of the applied electromagnetic and mechanical stress. Barkhausen noise signal is mathematically processed by use of fractal dimension analysis.
Findings
The paper cleary reveals significant impact of electromagnetic field in junction with mechanical loading. Electromagnetic impact depends on the magnitude of the field.
Research limitations/implications
Research limitations are given by the fact that in real field applications, e.g. wind power plants, bearings are exposed by multiple influences and the methodology is not applicable to those conditions.
Practical implications
The methodology can be applied to real field applications in condition monitoring systems. Up to now, no reasonable on‐line measurement is in use determining sub surface fatigue phenomena. The paper hence, reveals the possibility to raise condition monitoring into a new perspective.
Originality/value
The use of Barkhausen noise signal processing, as presented here, is original with respect to real field applications, such as wind power plants with a high demand in condition monitoring, especially off‐shore plants.
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The purpose of this paper is to review relevant literatures on career success and develop a theoretical framework and testable propositions concerning how human capital…
Abstract
Purpose
The purpose of this paper is to review relevant literatures on career success and develop a theoretical framework and testable propositions concerning how human capital, person‐environment fit and organizational support relate to career success. Whilst acknowledging the substantial literature that has accumulated regarding the various antecedents and operationalizations involved in employees' career success, there is little research as how person‐environment fit and career success are related.
Design/methodology/approach
Literature outlining approaches to career success is summarized and research at the intersection of person‐environment fit and organizational support/career success are reviewed. This is followed by a set of propositions based upon the antecedents of career success.
Findings
It is suggested that person‐environment fit and organizational support are important antecedents of career success. Knowledge of career changes and these antecedents help individuals and organizations manage career success.
Research limitations/implications
Future research should examine empirically the linkages suggested by the paper along with other relationships asserted or implied by person‐environment fit and career success literature as mentioned in the paper.
Practical implications
Both employers and employees may benefit from integrating different types of fit into the psychological contract because each fit will impact aspects of career success. Therefore, organizations need to select and develop employees that can easily adjust and fit into careers that are compatible with their work environments.
Originality/value
This paper contributes to the literature by being one of the first to examine the effects of different types of person‐environment fit on career success.
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Multinational organizations are often unable to send their first-choice candidates on international assignments because employees are unwilling to relocate internationally. The…
Abstract
Purpose
Multinational organizations are often unable to send their first-choice candidates on international assignments because employees are unwilling to relocate internationally. The purpose of this paper is to understand how organizations can effectively increase employees’ willingness to relocate internationally.
Design/methodology/approach
The study sample consisted of 229 employees who have not previously worked abroad in a large and global-minded Taiwanese bank.
Findings
This study found that when employees perceived international assignment experience to be valuable to their career and valued by their organization, they reported a higher level of willingness to relocate internationally. Moreover, this study also found the perceived organizational support (POS) on career and adjustment as moderators.
Research limitations/implications
The use of one company in Taiwan as the source of the sample may limit the generalizability of the results. The cross-sectional design of this study also makes it impossible to examine the causality among variables.
Practical implications
To enhance employees’ willingness to relocate internationally, organizations should ensure that they communicate clearly that organizations value employees’ international assignment experience before, during, and after the assignment.
Originality/value
This study uses social informational processing theory to examine the effects of international assignment value on employee willingness to relocate internationally, as well as the effects of POS for international assignment on employee willingness to relocate internationally.
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Hugo D. Asencio, Fynnwin Prager, José N. Martínez and John Tamura
This paper examines the relationship between government economic development programming and entrepreneurial activity, by examining evidence in Southern California cities. While…
Abstract
Purpose
This paper examines the relationship between government economic development programming and entrepreneurial activity, by examining evidence in Southern California cities. While numerous studies explore this relationship between government institutions and entrepreneurship at the level of countries and states, significant questions remain at the level of city government, and the influence of local government economic development programs on city-level entrepreneurial activity.
Design/methodology/approach
This paper uses regression analysis of data from all 215 Southern California cities to decompose the complex relationships between economic development programming and different types of entrepreneurial activity.
Findings
Results suggest startups are attracted to cities with higher crime rates, more diversity, and older populations, yet not those with higher levels of economic development programming. There is evidence that some types of economic development programming may influence entrepreneurship, especially for the level of minority-owned businesses.
Originality/value
The paper makes three important contributions to the literature. First, it is among the first to use local (city-level) entrepreneurship as an outcome variable to measure the effect of government economic development programming. Many scholars have instead chosen to look at outcomes relating to general economic growth (e.g. new jobs) rather than outcomes specific to local entrepreneurship. Second, it explores city-wide entrepreneurial activity with respect to numerous measures, such as start-ups, minority and female ownership, and self-employment. Third, it examines the potential influence of economic development programming, both on aggregate and decomposed into economic development program clusters.
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The purpose of this study is to formulate the cost of corruption and undue private benefit.
Abstract
Purpose
The purpose of this study is to formulate the cost of corruption and undue private benefit.
Design/methodology/approach
The design is based on cost formulas of the corruption already formulated, and the design of these formulas allows the calculation for Argentina in 2021 of the cost of the corruption.
Findings
The corruption cost models for bribes and cost overruns for public works are the theoretical basis for obtaining the undue private benefit. Based on the formulas developed to calculate the costs of corruption for Argentina 2021.
Research limitations/implications
There are no limitations in the model.
Practical implications
In addition to the calculation of the cost of corruption, the formula of private profit undue by corruption is developed.
Social implications
The social implications are certainty about the cost of corruption for Argentina in 2021.
Originality/value
The present work is original and its value is given by the formulation and practical demonstration of the cost of corruption for Argentina in 2021 and the undue private benefit.
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