bluuebunny/crossref_metadata_2025_split huggingface dataset:
Organizational handling of careers influences managers' organizational commitment
Authors: Bambacas Mary 
Published: September 2010

PurposeThis study aims to investigate how the relationship between two aspects of career management – the practice of career development activities by the organization (organizational career development) and career development activities by the individual (career self‐management), and affective and normative commitment levels, are influenced by the value that employees place on the career development offerings of their organizations.Design/methodology/approachEmpirical evidence was drawn from 196 manager members of the Australian Institute of Management. Hierarchical moderated regression analysis was used to test the hypothesized relationships of the model.FindingsLevels of affective and normative commitment improved when organizations provided continuous learning to managers. This was the case, for career management both by the individual, and by the organization. In particular, normative commitment was strongest for those who valued the continuous learning they received while managing their own careers. For the group of managers who experienced organizational career development the opposite was the case. Continuous learning provided by the organization improved their levels of affective commitment.Research limitations/implicationsOrganizations must understand the needs of their staff so that they can provide career management practices that are valued and can enhance their levels of affective and normative commitment.Originality/valueThe paper highlights the importance of organizations paying attention to what individuals value so that they may fit with the organization and enhance their commitment to it. It also draws attention to career self‐management as a positive organizational initiative.
Teaching managers: learning, research and workplace practice
Authors: Rowland Caroline , Hall Roger 
Published: September 2010

PurposeThis paper seeks to explore the way in which professional management programmes are informed by research and workplace practice. The focus is on the areas of motivation, appraisal and the management of change.Design/methodology/approachThe paper is a longitudinal study using a mixed methods approach. Middle and senior managers engaged on professional management programmes were surveyed on workplace practice. Literature reviewed included syllabus guidelines from professional bodies and selected core textbooks.FindingsA content analysis revealed that there was a lack of congruence between what is taught to managers and workplace practice. However, research was found to have an impact on teaching and indirectly it influenced individual beliefs if not organisational practice.Practical implicationsConclusions indicate that professional management programmes are still failing to bridge the gap between syllabus content current research and workplace practice. There is little to show that the needs of business are being satisfied compared with successful models embedded in other professions.Originality/valueThe paper suggests the value of adopting an integrated model that combines professional and academic teaching of management. It further supports the relevance of research to workplace practice.
Marketing contemporary visual art
Authors: Jyrämä Annukka , Äyväri Anne 
Published: September 2010

PurposeThe paper seeks to focus on the management of art galleries in the context of contemporary visual art markets, viewed from the institutional and industrial network approaches. The aim is to understand the shaping of management practices. The characteristics of the visual art market, the immaterial value of products and the key role of relationships and networks, make the contemporary visual art market an insightful context to study the management practices.Design/methodology/approachA qualitative research method was chosen – altogether 80 interviews were conducted in European markets.FindingsThe contemporary art market can be seen as a network structure consisting of actors who participate in creation and change of the practices. The management practices of galleries were created and changed by imitations and through isomorphic forces. It is proposed that major changes in management practices originate mainly from financial reasons, where the driving force is to survive economically. The striking similarity of gallery management practices was interesting. The shared practices are used as means to create stability for the market.Practical implicationsA gallery manager should reflect the implicit norms and values of the art field in their art gallery management. The knowledge of these management practices is of importance especially for new galleries entering the market.Originality/valueThe theoretical contribution of the study builds on elaboration of the practices concept by combining aspects of the institutional approach and the industrial networks approach.
The effect of CEO tenure on CEO compensation
Authors: Zheng Yudan 
Published: September 2010

PurposeThe paper aims to study the effect of tenure on the structure of CEO compensation. The relation between CEO compensation and CEO tenure provides a good testing bed for many effects: the managerial power effect, the portfolio consideration effect, the learning effect, and the career concern effect.Design/methodology/approachTobit regressions were run of the percentage of equity‐based compensation on CEO tenure and the effect of tenure compared between inside CEOs and outside CEOs.FindingsIt was found that the percentage of equity‐based compensation increases during the early years of tenure for outside CEOs, and decreases during the later years of tenure for inside CEOs. Before they are tenured, outside CEOs have significantly higher and faster growing percentage of equity‐based compensation than inside CEOs. Furthermore, the portfolio consideration effect and the learning effect are the major effects in explaining the effect of tenure on the compensation structure.Practical implicationsThe evidence that boards of directors take into account the CEOs’ holdings of equity incentives, the types of CEOs, and their years on tenure to adjust the structure of CEO compensation indicates that firms should, and do, try to optimize their CEO compensation structure on the basis of firm‐specific or CEO‐specific characteristics. It is suggested that there is no simple formulaic approach to governance reform.Originality/valueThe paper contributes to the literature by studying and explaining the different patterns of compensation structure over CEO tenure between inside CEOs and outside CEOs.
Torque measurement methods for very high‐speed motors
Authors: Pfister Pierre‐Daniel , Perriard Yves 
Published: September 2010

PurposeThe purpose of this paper is to develop a contactless torque measurement methods. The need for low‐weight, high‐efficiency and high‐power density motors has led to an increased research and development activity in the field of very high speed (VHS) motors or generators. Torque measurement methods are inherently linked with the target speed and power of the motor. Therefore, new torque measurement methods compatible with VHS need to be designed in order to apprehend this new area of electrical machines. In this paper, the target speed is 200,000 rpm.Design/methodology/approachThe goal is to develop contactless torque measurement methods. Indeed, a mechanical connection between the motor shaft and the measuring device adds normal modes to the shaft. Also, if a measuring device is mechanically connected and held through bearings, then the whole design is hyperstatic. Both aspects can be critical at VHSs.FindingsAn indirect method based on the inertia of the rotor allows to measure high torques very rapidly. It is validated through a second method based on eddy currents. Also, a practical setup for measuring friction torque in VHS ball bearings is presented.Originality/valueThe presented methods are of high value for assessing a motor efficiency and useful to anybody confronted with the difficulties of torque measurements in the area of high‐speed machines.
Dynamic analysis method of spherical resonant actuator using 3D finite element method
Authors: Suzuki Satoshi , Yamaguchi Tadashi , Kawase Yoshihiro , Sato Koichi , Kakami Shuhei , Hirata Katsuhiro , Ota Tomohiro , Hasegawa Yuya 
Published: September 2010

PurposeThe purpose of this paper is to develop a dynamic analysis method of a novel spherical resonant actuator. In this method, the magnetic field equation is coupled with the electric circuit equation and the motion equation with the mesh modification method using the Laplace equation applied to the rotation of the spherical actuator.Design/methodology/approachThe static torque characteristics and dynamic characteristics of the spherical resonant actuator using the proposed method are clarified. The calculated results are compared with the measured ones.FindingsThe calculated static torque agrees well with the measured one. The validity of the computation using the proposed method is quantitatively clarified through the comparison with the measurement.Originality/valueThe paper proposes the dynamic analysis method of the complicated spherical resonant actuator using the mesh modification method by the Laplace equation.
Automated sizing of permanent magnet synchronous machines with respect to electromagnetic and thermal aspects
Authors: Hafner Martin , Schöning Marc , Hameyer Kay 
Published: September 2010

PurposeThe purpose of this paper is to consider thermal analysis as part of an automated sizing and design process. The temperature estimation at characteristic points of the machine, and in particular in permanent magnets, is essential to accurately simulate the electromagnetic behavior and avoid irreversible demagnetization.Design/methodology/approachIn this paper, an electromagnetic dimensioning model, parameterized by finite element analysis, is coupled to a thermal lumped‐parameter model to constitute a fast and efficient design tool for electrical machines.FindingsA parameterized and hybrid FE‐analytical electromagnetic model, which combines analytical and numerical advantages, to archive a fast and accurate electromagnetic simulation results is combined with a thermal lumped‐parameter model for water‐cooled and passive air‐cooled surface mounted permanent magnet synchronous machines (PMSM).Practical implicationsSizing, electromagnetic and thermal modeling aspects are integrated into an automated design process. The whole design process is demonstrated on two standard industrial servo motors for passive and active water cooling and afterwards compared with available measurements.Originality/valueThe proposed method allows considering thermal aspects during the iterative automated electromagnetic design process of PMSM.
In‐plane eddy current analysis for end and interior stator core packets of turbine generators
Authors: Yamazaki Katsumi , Yamato Yuki , Mogi Hisashi , Kaido Chikara , Nakahara Akihito , Takahashi Kazuhiko , Ide Kazumasa , Hattori Ken'ichi 
Published: September 2010

PurposeThe purpose of this paper is to investigate the distribution of in‐plane eddy currents in stator core packets of turbine generators, and to reveal the loss reduction effect by the slits in the stator teeth.Design/methodology/approachThe in‐plane eddy currents are calculated by a 3D finite element method that considers lamination of electrical steel sheets. First, this method is applied to a simple model that simulates the stator core of the turbine generators. The calculated losses are compared with the measured losses in order to confirm the validity. Next, the same method is applied to a 250 MVA class turbine generator.FindingsThe validity of the calculation method is confirmed by the measurement of the simple model. By applying this method to the turbine generator, it is clarified that the considerable in‐plane eddy currents are generated not only at the end stator packets, but also at the top of the teeth of the interior packets due to the duct space. It is also clarified that the in‐plane eddy‐current loss decreases as nearly half by the slits of the stator teeth.Originality/valueA reliable calculation method for the in‐plane eddy‐current loss in the turbine generators is developed. The results obtained by this method are valuable for the design of the generator from the viewpoint of heat conduction.
Analysis method of negative ion by electrostatic atomization
Authors: Okaue Yu , Yoshikawa Gaku , Miyasaka Fumikazu , Hirata Katsuhiro 
Published: September 2010

PurposeThe purpose of this paper is to propose an analysis method of negative ion by electrostatic atomization. Because the electrostatic atomization includes large deformation of a drop of water, it is difficult to analyze with conventional fluid analysis methods such as the finite differences method, the finite element method (FEM) and so on.Design/methodology/approachIn this method, electrostatic field equation is coupled with Navier‐Stokes equation of a drop of water, employing the moving particle semi‐implicit method and FEM. The validity of the method is verified through the measurement.FindingsIt was found that the difference between calculated and measured results becomes large as the voltage increases.Research limitations/implicationsIn order to improve the accuracy, it is necessary to improve the way to calculate surface tension and the analysis condition.Originality/valueThis paper confirms the usefulness of the numerical method to elucidate electrostatic atomization.
Automatic HF model generation and impedance optimization for low voltage DC motors
Authors: Benecke Jens , Linde André , Dickmann Stefan 
Published: September 2010

PurposeThe purpose of this paper is to create a model to calculate the high frequency (HF) complex impedance of common low‐voltage DC motors from construction parameters to predict their electromagnetic compatibility (EMC) emission behaviour and perform sensitivity analyses, and an optimization routine is developed to find combinations of construction parameters which best match a desired impedance curve.Design/methodology/approachThe motor is divided into components. For each component, its electrical behaviour including parasitics is derived from material and geometry, and the electromagnetic interactions between components are defined. These results are then reproduced using inductances, capacitances, and resistors where applicable. Mathematical expressions are given to calculate their value from the material and geometrical parameters.FindingsThe complex impedance of DC motors can be accurately constructed from geometry and material parameters within a small range. The optimization routine successfully finds parameters to match a desired curve within specified parameter ranges. This can help finding a motor with lower conducted electromagnetic interference.Originality/valueThis analytically parameterized model constitutes a new way to describe electrical motors from an EMC perspective and define critical parameters.
Comparative performance analysis of aluminum‐ and copper‐rotor induction generators in standalone wind power application
Authors: Hafiz Khurshid , Nanda Gaurav , Kar Narayan C. 
Published: September 2010

PurposeIn order to assess the performance of an induction generator in standalone wind power application, it is imperative that mathematical models are developed that accurately represent the system and take into account various electromagnetic influences such as skin effect. The purpose of this paper is to utilize mathematical models to study the transient and steady‐state behaviour of the self‐excited induction generator (SEIG), in one case with an aluminum rotor, in another case, with a copper rotor, under various load conditions while taking the above factor into account.Design/methodology/approachMathematical models of a SEIG in the d‐q axis frame have been developed based on the generalized machine theory. A relationship between the mutual inductance and the magnetizing current of the machine has been presented. The rotor impedances have been customized to include skin effect. Using these relations, the model has been extended to include the saturation and skin effects. In order to verify the accuracy of the models, numerical and experimental investigations have been carried out on two 7.5 hp aluminum‐rotor and copper‐rotor SEIGs.FindingsIt was found that the model that takes into account the saturation and skin effects produces numerical results that closely match experimental values for both the machines.Originality/valueThis paper describes how a model of an SEIG considering saturation and skin effect has been developed and applied to aluminum‐ and copper‐rotor machines of similar power ratings to analyze their performance.
Electric motor winding temperature prediction using a simple two‐resistance thermal circuit
Authors: Antunes Cezario Cassiano , Penha Silva Hilton 
Published: September 2010

PurposeThe purpose of this paper is to propose a simplified thermal circuit to estimate the temperature rise in the winding of a totally enclosed fan cooled electric motor for different loads and/or cooling conditions since the motor has already been tested for a known condition.Design/methodology/approachThe determination of the convection resistance is based on classical Nusselt correlations and the value of conduction resistance is provided from a known load condition and the corresponding temperature rise in the winding.FindingsPredicted temperature values showed good agreement with the experimental results, demonstrating that the hypothesis of simplification to a punctual source of thermal energy is acceptable.Research limitations/implicationsIt is necessary that the motor has already been tested for a known condition (losses, temperature, and ventilation). Although the basic idea of this methodology is based on the use of a reference test condition of the same motor, as a suggestion, with small modifications the same methodology can be used to estimate the thermal behavior of different sized motors, provided a similar motor has already been tested.Practical implicationsThis approach results in a fast methodology to estimate the thermal behavior of an electric motor in different loads and/or cooling conditions.Originality/valueThe differential of this circuit is the use of only two thermal resistances, one for the whole conduction and the other for the convection. This approach is a way to overcome the difficulties related to the determination of the thermal contact resistance and the equivalent conduction resistance between the winding and the different isolation systems inside the slots.
Analytical thermal models for small induction motors
Authors: Staton Dave , Popescu Mircea 
Published: September 2010

PurposeThermal analysis is an important design aspect and becoming a more important component of the electric motor design process due to the push for reduced weights and costs and increased efficiency. The purpose of this paper is to demonstrate that the accuracy of analytical thermal models depends on the accuracy of the thermal resistance computation and on the number of nodes in the equivalent thermal circuit.Design/methodology/approachIn this paper, several thermal analytical models with different numbers of nodes are compared against with each other and with experimental data.FindingsIt is demonstrated that the more sophisticated and detailed model having a larger number of nodes can be used to calibrate the simpler but faster models with less nodes. The models are all for the same range of small totally enclosed non‐ventilated induction motors.Originality/valueThis paper shows that simplified and/or detailed analytical thermal models can be successfully used in predicting the temperature rise in small induction motors. The level of detail and accuracy of these models strongly depends on the number of nodes and how the thermal resistances are set up. The calibration process for various reduced nodal model has been successfully described. Once calibrated, the reduced node thermal models give both satisfactory accuracy and allow very fast and robust thermal calculations.
Analysis of a fault‐tolerant hybrid‐excitation DC motor
Authors: Bolognesi Paolo , Papini Francesco , Bruno Ottorino 
Published: September 2010

PurposeThe purpose of this paper is to investigate the use of hybrid‐excitation solutions, using contemporaneously permanent magnets and field coils, for DC machines intended to operate as the core of high‐reliability drives in critical applications supplied by batteries (e.g. fire‐extinguishing pumps, smoke blowers, etc.) where a roughly constant speed is required and a minimal use of electronic devices is prescribed to improve overall dependability.Design/methodology/approachA high‐reliability hybrid‐excitation DC motor, initially designed basing on theoretical considerations, is then analyzed using purposely developed 2D and 3D finite element method (FEM) electromagnetic models under static, dynamic, healthy, and faulty conditions.FindingsThe simulation results confirm that properly designed drives employing hybrid‐excitation DC motors may constitute an effective solution for applications requiring a very high reliability under DC supply with limited speed regulation capability.Research limitations/implicationsThe methodology employed exhibits the usual limits concerning the accuracy of FEM analysis: hysteresis is neglected, 2D simulations neglect axial component of fields, in 2D dynamic analysis the electrically discontinuous laminated cores are modeled as orthotropic continuous parts, commutator operation is approximated by means of a position‐dependent resistors network, and the excitation current provided by choppers is approximately considered as constant.Practical implicationsHybrid excitation DC motors, which may be easily manufactured using existing facilities and mature technologies, might provide an interesting solution for emergency drives requiring minimal regulation capabilities and very high reliability under direct DC supply.Originality/valueHybrid excitation is not much investigated in the literature especially for DC motors, although such solution may result potentially interesting especially when a limited flux adjustment capability is required.