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1 – 10 of over 3000
Article
Publication date: 8 June 2012

Fariba Darabi and Murray Clark

To investigate the initiation and development of effective business relationships, including knowledge transfer partnerships, with the primacy of trust as a key factor for…

1622

Abstract

Purpose

To investigate the initiation and development of effective business relationships, including knowledge transfer partnerships, with the primacy of trust as a key factor for collaborative development. Specifically, the aim was to explore Vangen and Huxham's (2003) notion of a “trust building loop” in the context of a Northern (UK) Business School and regional SMEs.

Design/methodology/approach

The methodological approach employed was the “General Analytic Induction” for the interpretation of the data. This was used to develop theory inductively from 23 in‐depth interviews.

Findings

The results emphasized that trust, especially trust in individuals, is fundamental to collaborative settings, from both practitioners’ and academic points of view. The study identified barriers and drivers to initiating trust‐based relationships and a model of initiating collaboration was suggested.

Practical implications

The benefits from the research were seen as facilitating the development of effective business relationships between local business schools and SMEs in their regions. This investigation provided pointers that might assist business schools to understand how to manage their relationships with this group of stakeholders (SMEs) to stimulate and improve engagement.

Originality/value

There has been minimal research works on building successful collaborations within the business schools context, which contributes to professional practice through collaboration between business schools and SMEs.

Details

International Journal of Entrepreneurial Behavior & Research, vol. 18 no. 4
Type: Research Article
ISSN: 1355-2554

Keywords

Article
Publication date: 11 October 2011

Søren Wandahl, Alexia Jacobsen, Astrid Heidemann Lassen, Søren Bolvig Poulsen and Henrik Sørensen

User‐driven innovation (UDI) has been proven to successfully increase the value of products and services in single companies with direct linkages to the end‐user. The construction…

1463

Abstract

Purpose

User‐driven innovation (UDI) has been proven to successfully increase the value of products and services in single companies with direct linkages to the end‐user. The construction material industry often has no direct linkages to the end‐user, due to supply networks through builder merchants. Moreover, a lack of user knowledge is common in such networks, and companies rarely have explicit knowledge on how their products and services are in fact used and valued by their end‐users. Thus, it is clear that UDI is not directly applicable to the construction material industry without further developments. Hence, the purpose of this paper is to demonstrate that a network perspective is essential when adapting and implementing UDI in the construction material industry and to let the advantages of doing so surface.

Design/methodology/approach

The research design includes a number of different approaches and types of interaction between the researchers and industry. Additionally, an extensive literature review on UDI is carried out to identify variables necessary for successful adaptation to a network perspective.

Findings

The conclusion of this research validates that a network approach to adapting UDI in the construction material industry is a precondition for a successful innovation journey. In addition, it was concluded that by adapting the network perspective new value‐adding potentials became visible, which could have a huge impact on innovation, effectiveness, efficiency, etc. in the construction material industry.

Originality/value

The paper adds to the body of knowledge on how to implement UDI in a supply network by developing a framework for such an innovation process. The framework has its outset in any given generic new product development model with a logical sequence of steps. However, the framework is further developed into defining the networks activities, the internal activities, and the user‐oriented activities needed.

Details

Construction Innovation, vol. 11 no. 4
Type: Research Article
ISSN: 1471-4175

Keywords

Article
Publication date: 1 June 2000

K. Wiak

Discusses the 27 papers in ISEF 1999 Proceedings on the subject of electromagnetisms. States the groups of papers cover such subjects within the discipline as: induction machines;…

Abstract

Discusses the 27 papers in ISEF 1999 Proceedings on the subject of electromagnetisms. States the groups of papers cover such subjects within the discipline as: induction machines; reluctance motors; PM motors; transformers and reactors; and special problems and applications. Debates all of these in great detail and itemizes each with greater in‐depth discussion of the various technical applications and areas. Concludes that the recommendations made should be adhered to.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 19 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 June 2000

A. Savini

Gives introductory remarks about chapter 1 of this group of 31 papers, from ISEF 1999 Proceedings, in the methodologies for field analysis, in the electromagnetic community…

1129

Abstract

Gives introductory remarks about chapter 1 of this group of 31 papers, from ISEF 1999 Proceedings, in the methodologies for field analysis, in the electromagnetic community. Observes that computer package implementation theory contributes to clarification. Discusses the areas covered by some of the papers ‐ such as artificial intelligence using fuzzy logic. Includes applications such as permanent magnets and looks at eddy current problems. States the finite element method is currently the most popular method used for field computation. Closes by pointing out the amalgam of topics.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 19 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 June 2020

Ammar Abdi, Youcef Ouazir, Georges Barakat and Yacine Amara

This paper aims to develop a new quasi-three dimensional (3D) analytical model devoted to the study of nonlinear transient magneto-thermal coupled problems in permanent magnet…

Abstract

Purpose

This paper aims to develop a new quasi-three dimensional (3D) analytical model devoted to the study of nonlinear transient magneto-thermal coupled problems in permanent magnet (PM) transverse flux induction heating device (TFIHD).

Design/methodology/approach

The presented work is based on analytical development of strongly coupled problem, including electromagnetic and thermal boundary problems. The electromagnetic problem is first solved by using the separation variables method to evaluate the induced currents in the nonmagnetic plate and the resulting power density loss distribution. The plate temperature profile is then obtained thanks to strong involvement of this magnetic model in a new analytical thermal model combining the separation of variables method and the Green’s functions transient regime analysis method. The coupled model is then used in a simulation procedure of the magneto-thermal process allowing taking into account the workpiece electrothermal nonlinear properties. The developed coupled model is validated by computing the performances of the studied PM TFIHD and comparing them to those obtained by finite element simulations.

Finding

An efficient transient quasi-3D magneto-thermal analytical model is developed allowing rapid analysis of PM induction heating for core heating of parallelepiped parts. The developed model also allows fast and accurate simulations of nonlinear and transient three dimensional (3D) magneto-thermal phenomena for planar induction heaters.

Research limitations implications

The developed quasi-3D magneto-thermal analytical model is limited to design induction heating devices of planar structure with PM inductors.

Originality/value

A new transient quasi-3D magneto-thermal analytical model accounts for non-linearity and edge effect and helps to fast study and fast design of linear permanent magnet induction heating device.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 39 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 8 October 2018

Ammar Abdi, Youcef Ouazir, Georges Barakat and Yacine Amara

This work aims to study a new design of linear permanent magnet transverse flux induction heating devices of nonmagnetic parallelepipedic workpiece. In these topologies, the…

Abstract

Purpose

This work aims to study a new design of linear permanent magnet transverse flux induction heating devices of nonmagnetic parallelepipedic workpiece. In these topologies, the permanent magnet inductor produces a static magnetic field, and the workpiece to be heated is subjected to a linear movement. To study the magnetothermal process, a new analytical coupling method between the magnetic and thermal phenomena is developed. This analytical model described in this study takes into account the variation of the physical properties of the heated workpiece. The analytical results are compared with good agreement to those issued from finite elements simulations, as well as those issued from measurements on an actual prototype.

Design/methodology/approach

The research methodology is based on analytical development of coupled problem, including the electromagnetic and thermal boundary problems. A strongly coupled magneto-thermal analytical model is developed; the time dependent magnetic problem is first solved by using the separation of variables method to evaluate the induced currents in the nonmagnetic plate and the resulting power density loss distribution. The plate temperature profile is then obtained, thanks to strong involvement of this magnetic model in a new analytical thermal model based on a synergy of separation of variables method and Green’s function transient regime analysis method.

Findings

The results show that an efficient transient magneto-thermal analytical model was developed allowing fast analysis of permanent magnet induction heater for deep heating of parallelepipedic workpieces. Developed model allows also fast and precise simulations of nonlinear and transient magneto-thermal phenomena for different types of permanent magnet induction heating devices.

Practical implications

The developed magneto-thermal analytical model can be used for fast designing of permanent magnet linear induction heating devices for moving parallelepipedic nonmagnetic workpiece.

Originality/value

A new analytical coupled model, including the electromagnetic and transient thermal boundary problem with additional algebraic equations and taking into account the nonlinearity, has been developed. The developed model accuracy was validated with a permanent magnet linear induction heating device. Developed coupled analytical model allows fast analysis and designing of such permanent magnet linear induction heating devices.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 January 2006

Zbigniew Krzemiński, Arkadiusz Lewicki and Mirosław Włas

To develop general forms of multiscalar models of the induction motor and to present properties of the sensorless control systems based on such models.

Abstract

Purpose

To develop general forms of multiscalar models of the induction motor and to present properties of the sensorless control systems based on such models.

Design/methodology/approach

Previously presented multiscalar model of the induction motor based on a stator current and rotor flux vector is generalized as a model of type 1. New model of type 2 is defined for stator current and the vector which is directly controlled by a voltage vector. The above models are applied in a sensorless control system with speed observer. Dynamical properties of the sensorless control systems are investigated by simulations and experiments.

Findings

Application of the multiscalar model of type 2 results in higher exactness of sensorless control system than application of the multiscalar model of type 1. Controlled variables are more smooth in transients.

Research limitations/implications

This is not an analytical proof of stability of the control systems.

Practical implications

Provides very useful information for development of sensorless control systems for the induction motor.

Originality/value

This paper extends the known method of nonlinear control of the induction motor to the general form. It is possible to choose the sensorless control system of better properties than those used so far.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 25 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 December 2003

Maurizio Cirrincione, Marcello Pucci, Giansalvo Cirrincione and Gérard‐André Capolino

This paper presents for the first time the analytical solution of the constrained minimization for the on‐line estimation of the electrical parameters of an induction motor. The…

Abstract

This paper presents for the first time the analytical solution of the constrained minimization for the on‐line estimation of the electrical parameters of an induction motor. The method is fully described mathematically and its goodness is verified experimentally on a suitably set up test bench. This methodology permits the almost correct computation of all the so called K‐parameters, which is not always the case in current literature, thus resulting in the correct estimation of the electrical parameters.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 22 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 8 May 2018

Konrad Woronowicz, Majd Abdelqader, Ryszard Palka and Jordan Morelli

This paper aims to present a method for calculating electromagnetic fields, eddy currents and forces for a quasi-static two-dimensional (2-D) model of linear induction motors…

Abstract

Purpose

This paper aims to present a method for calculating electromagnetic fields, eddy currents and forces for a quasi-static two-dimensional (2-D) model of linear induction motors (LIMs) where the primary side is modeled as a collection of individual coils.

Design/methodology/approach

An analytical solution using Fourier series is derived for a general source with current excitations residing in an airgap and moving relative to a conducting plate and back iron. Ideal magnetic material with infinite permeability is used to model the primary iron above the primary source and the back iron below the conducting plate.

Findings

The analytical solution is compared to a commercial 2-D finite element analysis (FEA) simulation for validation and then compared to a 2-D FEA model with a more detailed geometry of the LIM. The analytical model accurately predicts LIM thrust even though the geometry of the primary core is simplified as an infinitely long flat slab. 2-D frequency FEA can be used successfully to predict in motion LIM performance.

Originality/value

The analytical solution presented here models the primary excitations as individual discrete coils instead of current sheets, which all existing models are based on. The discrete coils approach provides a more intuitive and realistic model of the LIM.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 13 September 2011

F. Dughiero, M. Forzan, S. Lupi, F. Nicoletti and M. Zerbetto

Low electrical resistivity metal billets can be heated by the currents induced by the rotation of the billet itself inside a transverse DC magnetic field produced by a…

Abstract

Purpose

Low electrical resistivity metal billets can be heated by the currents induced by the rotation of the billet itself inside a transverse DC magnetic field produced by a superconductive coil. The main drawback of this approach is related to cost of installation that requires an adequate refrigerating system. The purpose of this paper is to propose a more convenient solution, which allows the same high efficiency to be achieved at lower cost. In this solution, the billet is kept still and a series of permanent magnets, positioned in the inner part of a ferromagnetic frame, is rotated.

Design/methodology/approach

Some results of the new induction system are shown. These results are obtained applying for the electromagnetic solution both an FE commercial code and an analytical method. The analytical code is developed because several parameters of the system need to be optimized.

Findings

The performance of the solution presented is comparable with those of the system with superconductive coils. The results of the two methods applied are in good agreement; thus the analytical code is validated.

Originality/value

A new solution for the induction heating of aluminum billets is presented. The analytical code developed requires a very short computational time, also because it gives directly the steady‐state condition of the system and, for this reason, it can be conveniently applied to an automatic design process.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 30 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

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