Search results
1 – 10 of 22Michael Nierla, Michael Loeffler, Manfred Kaltenbacher and Stefan Johann Rupitsch
The numerical computation of magnetization processes in moving and rotating assemblies requires the usage of vector hysteresis models. A commonly used model is the so-called…
Abstract
Purpose
The numerical computation of magnetization processes in moving and rotating assemblies requires the usage of vector hysteresis models. A commonly used model is the so-called Mayergoyz vector Preisach model, which applies the scalar Preisach model into multiple angles of the halfspace. The usage of several scalar models, which are optionally weighted differently, enables the description of isotropic as well as anisotropic materials. The flexibility is achieved, however, at the cost of multiple scalar model evaluations. For solely isotropic materials, two vector Preisach models, based on an extra rotational operator, might offer a lightweight alternative in terms of evaluation cost. The study aims at comparing the three mentioned models with respect to computational efficiency and practical applicability.
Design/methodology/approach
The three mentioned vector Preisach models are compared with respect to their computational costs and their representation of magnetic polarization curves measured by a vector vibrating sample magnetometer.
Findings
The results prove the applicability of all three models to practical scenarios and show the higher efficiency of the vector models based on rotational operators in terms of computational time.
Originality/value
Although the two vector Preisach models, based on an extra rotational operator, have been proposed in 2012 and 2015, their practical application and inversion has not been tested yet. This paper not only shows the usability of these particular vector Preisach models but also proves the efficiency of a special stageless evaluation approach that was proposed in a former contribution.
Details
Keywords
This paper discusses country‐of‐origin effects for automotive brands in France, Germany, Italy and Spain. The focus is on two subdimensions of country‐of‐origin effects…
Abstract
This paper discusses country‐of‐origin effects for automotive brands in France, Germany, Italy and Spain. The focus is on two subdimensions of country‐of‐origin effects: perception of quality and emotions‐related aspects. Based on car drivers’ self‐images of various makes it is delineated that brands are perceived to have lower quality when evaluated in foreign markets. For Germany, Italy and Spain different results were found concerning the perception of emotional aspects. With respect to this dimension, foreign brands are evaluated superior in Germany. The opposite situation was found for foreign brands in Italy and Spain. Significant differences in country‐specific brand images were identified within the countries under consideration. The results apply to brands of the low/medium as well as luxury segment.
Details
Keywords
Qin Lu, Nadja Damij and Jason Whalley
High performance computing (HPC) is used to solve complex calculations that personal computing devices are unable to handle. HPC offers the potential for small- and medium-size…
Abstract
Purpose
High performance computing (HPC) is used to solve complex calculations that personal computing devices are unable to handle. HPC offers the potential for small- and medium-size enterprises (SMEs) to engage in product innovation, service improvement and the optimization of resource allocation (Borstnar and Ilijas, 2019). However, the expensive infrastructure, maintenance costs and resource knowledge gaps that accompany the use of HPC can make it inaccessible to SMEs. By moving HPC to the cloud, SMEs can gain access to the infrastructure without the requirement of owning or maintaining it, but they will need to accept the terms and conditions of the cloud contract. This paper aims to improve how SMEs access HPC through the cloud by providing insights into the terms and conditions of HPC cloud contracts.
Design/methodology/approach
This paper adopts a systematic literature review by implementing a four-step approach. A comprehensive search was undertaken and results synthesized to enable this paper’s objectives to be met.
Findings
This paper proposes that SMEs could gain competitive advantage(s) by understanding their own needs and improving their contract negotiation abilities, service management skills and risk management abilities before accepting the terms and conditions of the cloud contract. Furthermore, a checklist, service-level agreement, easily ignored elements and risk areas are presented as guidance for SMEs when reviewing their HPC cloud contract(s).
Originality/value
While HPC cloud contracts are a niche research topic, it is one of the key factors influencing the ability of SMEs to access HPC through the cloud. It is, however, by no means a level playfield with SMEs at a distinct disadvantage because of not influencing the writing up of the HPC cloud contract. The added value of the paper is that it contributes to our overall understanding of the terms and conditions of HPC cloud contracts.
Details
Keywords
Steven R. Ferraro and Darrol J. Stanley
Briefly reviews previous research on the value of investment advisors’ recommendations and presents a study comparing portfolio returns from analysts’ recommendations in the Wall…
Abstract
Briefly reviews previous research on the value of investment advisors’ recommendations and presents a study comparing portfolio returns from analysts’ recommendations in the Wall Street Journal’s “Dartboard” contest 1990‐1996, four randomly selected shares and the Dow Jones Industrial Average. Finds the analysts’ portfolio has the highest average returns and standard deviation; and that although some individual analysts have excellent scores in the contest, this is inversely related to the number of times they participate. Suggests that they do not significantly outperform other portfolios, but that contest winners’ tips have significant effects on the market, especially for non‐listed shares. Assesses the implications of the results for the efficient market hypothesis and the share prices of firms with higher asymmetric information.
Details
Keywords
Michael Nierla, Manfred Kaltenbacher and Stefan Johann Rupitsch
A major purpose of vector hysteresis models lies in the prediction of power losses under rotating magnetic fields. The well-known vector Preisach model by Mayergoyz has been shown…
Abstract
Purpose
A major purpose of vector hysteresis models lies in the prediction of power losses under rotating magnetic fields. The well-known vector Preisach model by Mayergoyz has been shown to well predict such power losses at low amplitudes of the applied field. However, in its original form, it fails to predict the reduction of rotational power losses at high fields. In recent years, two variants of a novel vector Preisach model based on rotational operators have been published and investigated with respect to general accuracy and performance. This paper aims to examine the capabilities of the named vector Preisach models in terms of rotational hysteresis loss calculations.
Design/methodology/approach
In a first step, both variants of the novel rotational operator-based vector Preisach model are tested with respect to their overall capability to prescribe rotational hysteresis losses. Hereby, the direct influence of the model-specific parameters onto the computable losses is investigated. Afterward, it is researched whether there exists an optimized set of parameters for these models that allows the matching of measured rotational hysteresis losses.
Findings
The theoretical investigations on the influence of the model-specific parameters onto the computable rotational hysteresis losses showed that such losses can be predicted in general and that a variation of these parameters allows to adapt the simulated loss curves in both shape and amplitude. Furthermore, an optimized parameter set for the prediction of the named losses could be retrieved by direct matching of simulated and measured loss curves.
Originality/value
Even though the practical applicability and the efficiency of the novel vector Preisach model based on rotational operators has been proven in previous publications, its capabilities to predict rotational hysteresis losses has not been researched so far. This publication does not only show the general possibility to compute such losses with help of the named vector Preisach models but also in addition provides a routine to derive an optimized parameter set, which allows an accurate modeling of actually measured loss curves.
Details
Keywords
The purpose of this paper is to analyse the accounting research project concerned with accounting narrative obfuscation, focusing on the translation of the concept of readability…
Abstract
Purpose
The purpose of this paper is to analyse the accounting research project concerned with accounting narrative obfuscation, focusing on the translation of the concept of readability from educational psychology via an earlier literature concerned with the readability of accounting narratives per se.
Design/methodology/approach
This paper uses actor-network theory and examines, in particular, the need for a network to accommodate the interests of its actors and the consequent risk of failure.
Findings
The analysis shows that the project is failing because the network seeking to support it is failing, and failing because of its inability to adapt sufficiently to accommodate the interests of its constituents. This failure is contrasted with the earlier concern with readability per se, which did see a successful reconfiguration of actors’ interests.
Research limitations/implications
The puzzle of the maladjustment of the network concerned with obfuscation is examined and it is suggested that it is a consequence of interests prevailing in the wider academic research network within which the relevant human actors are embedded.
Social implications
The reasons for the failure of the project are bound up in the wider circumstances of the contemporary accounting research community and may affect scholars’ capacity to pursue knowledge effectively.
Originality/value
This paper contributes to a modest stream of actor–network analysis directed at accounting research itself.
Details
Keywords
The purpose of this paper is to illustrate the tasks involved in the planning and implementation of integrated marketing communications using an interesting, real‐life case study.
Abstract
Purpose
The purpose of this paper is to illustrate the tasks involved in the planning and implementation of integrated marketing communications using an interesting, real‐life case study.
Design/methodology/approach
A mix of secondary and primary research is used: analysis of academic literature, market research data and organisational data, as well as interviews conducted with members of the Renault Marketing Team.
Findings
The planning and implementation of integrated marketing communications is complex and involves a wide range of different management tasks. These include: situation analysis and identification of marketing communications opportunities; choosing the right marketing communications agency; campaign development and implementation, including the selection of the marketing communications mix, creative execution and media planning; campaign evaluation; planning of follow‐up campaigns; and managerial coordination between all tasks and parties involved to ensure integration of marketing communications initiatives throughout the campaign.
Originality/value
Applies marketing communications theories to a real‐life example and illustrates comprehensively the management tasks involved in the planning and implementation of integrated marketing communications campaigns. Provides hyperlinks and references to organisations and bodies relevant to the marketing communications industry as well as academic literature.
Details
Keywords
Peter Ross and Michael Blumenstein
The purpose of this paper is to analyse the impact of Cloud technologies on management practices and business strategies. It considers the role of human resource management (HRM…
Abstract
Purpose
The purpose of this paper is to analyse the impact of Cloud technologies on management practices and business strategies. It considers the role of human resource management (HRM) departments in supporting the organisational changes required for the introduction and integration of Cloud business strategies.
Design/methodology/approach
The study uses a qualitative exploratory research approach. It utilises the resource view of the firm and transaction costs economics (TCE) to support the analysis. It synthesises the literature with the qualitative interview data.
Findings
Cloud business models require organisations to focus on the nexus of business strategies and information and communication technology (ICT) capabilities. HRM departments can play a positive role in this process by better integrating ICT sections into business decision‐making processes. Cloud technologies may further change ICT worker functions and roles.
Research limitations/implications
Qualitative research approaches may limit the generality of the findings. However they allowed for an in‐depth analysis of complex Cloud related data that quantitative approaches may not have elicited.
Practical implications
The paper outlines a strategic “holistic” approach for organisations shifting to Cloud‐based business models.
Social implications
The paper examines the likely impacts of Cloud technologies on potential ICT worker redundancies.
Originality/value
The Cloud as the nexus of ICT and business and the potential role of HRM in facilitating shifts to Cloud business models have been under‐researched areas to date. The paper is therefore of value to ICT, HRM and business strategy focused academics and practitioners.
Details
Keywords
Omar Ali, Anup Shrestha, Valmira Osmanaj and Shahnawaz Muhammed
The significance of cloud services in information technology (IT) is increasing as a means of achieving enhanced productivity, efficiency and cost reduction. Through cloud-based…
Abstract
Purpose
The significance of cloud services in information technology (IT) is increasing as a means of achieving enhanced productivity, efficiency and cost reduction. Through cloud-based service, the reliability and scalability of an organization’s systems can be enhanced since organizations such as local governments are able to concentrate on their main business strategies. This research seeks to identify critical factors that may have an impact on the acceptance of cloud-based services, where the organizational context is based on local governments in Australia.
Design/methodology/approach
To formulate a more comprehensive IT innovation adoption model for cloud technology, factors from the technology-organizational-environment framework, desires framework and diffusion of innovation model were integrated. Data was obtained from 480 IT staff working in 47 local government organizations.
Findings
The research results show that the factors which had a statistically significant and positive impact on the adoption of cloud-based services in local governments were compatibility, complexity, cost, security concerns, expected benefits and organization size. It is likely that the outcomes from this research will provide insights to any organization seeking to make investment decisions on the adoption of cloud-based services.
Research limitations/implications
Limitations include generalizability of the findings since the data is restricted to local government areas in Queensland, Australia. Further, the sample mostly included individuals with managerial positions and may not completely capture the cloud adoption factors relevant for front line IT employees. Another limitation is the possible omission of factors that may be relevant but not considered due to the selected theories. Lastly, this research did not differentiate between different types of cloud adoption such as private, public, community and hybrid models that are possible in this context.
Originality/value
The paper provides a combination framework of cloud-based service adoption based on a literature review on cloud adoption from an IS perspective. It adapts integrated model to establish a more comprehensive innovation adoption framework for cloud technology.
Details
Keywords