Elizabeth Mamali and Peter Nuttall
Focusing on a community organisation, the purpose of this paper is to unravel the process through which infringing contested practices that threaten or compromise the community’s…
Abstract
Purpose
Focusing on a community organisation, the purpose of this paper is to unravel the process through which infringing contested practices that threaten or compromise the community’s sense of distinction are transformed into acceptable symbolic markers.
Design/methodology/approach
An ethnographic study comprising participant observation, in-depth interviews and secondary data was conducted in the context of a non-profit community cinema.
Findings
Taking a longitudinal approach and drawing from practice theory, this paper outlines how member-driven, customer-driven and necessity-imposed infringing practices settle in new contexts. Further, this paper demonstrates that such practices are filtered in terms of their ideological “fit” with the organisation and are, as a result, rejected, recontextualised or replaced with do-it-yourself alternatives. In this process, authority shifts from the contested practice to community members and eventually to the space as a whole, ensuring the singularisation of the cinema-going experience.
Practical implications
This paper addresses how the integration of hegemonic practices to an off-the-mainstream experience can provide a differentiation tool, aiding resisting organisations to compensate for their lack of resources.
Originality/value
While the appropriation practices that communities use to ensure distinction are well documented, there is little understanding of the journey that negatively contested practices undergo in their purification to more community-friendly forms. This paper theorises this journey by outlining how the objects, meanings and doings that comprise hegemonic practices are transformed by and transforming of resisting organisations.
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Flavio Calvano, Giorgio Dal Mut, Fabrizio Ferraioli, Alessandro Formisano, Fabrizio Marignetti, Raffaele Martone, Guglielmo Rubinacci, Antonello Tamburrino and Salvatore Ventre
– The paper aims to illustrate a numerical technique to calculate fields and inductances of rotating electrical machines.
Abstract
Purpose
The paper aims to illustrate a numerical technique to calculate fields and inductances of rotating electrical machines.
Design/methodology/approach
The technique is based on an integral formulation of the nonlinear magnetostatic model in terms of the unknown magnetization. The solution is obtained by means of a Picard-Banach iteration whose convergence can be theoretically proved.
Findings
The proposed method has been used to build a model of a large turbine generator. In particular, the influence of end effects on flux linkages has been computed. It has been demonstrated that the 2D solution underestimates the flux linkages as well as the no load voltage of 2 per cent, while the leakage fluxes are computed by the 2D solution with errors as high as 20 per cent.
Originality/value
The method is advantageous in comparison to standard methods.
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Raffaele Albanese, Flavio Calvano, Giorgio DalMut, Fabrizio Ferraioli, Alessandro Formisano, Fabrizio Marignetti, Raffaele Martone, Guglielmo Rubinacci, Antonelle Tamburrino and Salvatore Ventre
The purpose of this paper is to present a numerical approach for the computation of 3D magnetic fields in rotating electrical machines. The technique is suitable for the…
Abstract
Purpose
The purpose of this paper is to present a numerical approach for the computation of 3D magnetic fields in rotating electrical machines. The technique is suitable for the computation of flux densities and forces in the end windings of large synchronous turbo generators (TG).
Design/methodology/approach
The magnetostatic FEM model of the generator end windings is carried out for different displacements of the rotor axis to the stator magnetomotive force (MMF) axis. The method is based on a parallel integral formulation allowing to substantially reduce the computational effort.
Findings
The computational model requires only the discretization of magnetic materials and conductors and is fast enough for carrying out 3D analyses on a time scale fast enough for the needs of the designer. As far as the present application is concerned, the analysis of a synchronous generator in the class of 300‐400 MVA has shown that the most stressed elements of the armature conductors are those closer to the stator ends. The study demonstrates that the maximum stress component on the end windings is axial and is achieved when the MMF is aligned to the direct axis.
Originality/value
The present approach combining an efficient integral formulation, the sparsification of the relevant matrices and the parallel implementation of the related algorithms gives rise to an original computational tool that allows a more accurate description of the machine in comparison to other numerical simulations that can be found in the literature.
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A. Giannoglou, A. Kladas, J. Tegopoulos, A. Koumoutsos, D. Manolakos and A. Mamalis
Undertakes an analysis of electromagnetic forming process. Despite the fact that it is an old process, it is able to treat current problems of advanced manufacturing technology…
Abstract
Undertakes an analysis of electromagnetic forming process. Despite the fact that it is an old process, it is able to treat current problems of advanced manufacturing technology. Primary emphasis is placed on presentation of the physical phenomena, which govern the process, as well as their numerical representation by means of simplified electrical equivalent circuits and fully coupled fields approach of the electromagnetic‐mechanical‐electric phenomena involved. Compares the numerical results with measurements. Finally, draws conclusions and perspectives for future work.
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P. Mamalis, A. Andreopoulos and N. Spyrellis
Some of the basic mechanical characteristics such as tensile, bending, shear, compression, and surface properties of cotton knitted fabrics after a durable flame‐retardant…
Abstract
Some of the basic mechanical characteristics such as tensile, bending, shear, compression, and surface properties of cotton knitted fabrics after a durable flame‐retardant finishing, were studied by the objective‐evaluation method developed by Kawabata and Niva using the KES‐F system. In addition, properties such as bursting strength, drape and sewability were studied in order to further explore the influence of this treatment on the fabrics. All treated fabrics were flame‐retardant but their mechanical properties showed changes as a result of the above finishing. More specifically, a significant reduction in the bending and shear properties was recorded, which suggests that the flame‐retardant finishing primarily affects the above characteristics.
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This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder…
Abstract
This paper gives a review of the finite element techniques (FE) applied in the area of material processing. The latest trends in metal forming, non‐metal forming, powder metallurgy and composite material processing are briefly discussed. The range of applications of finite elements on these subjects is extremely wide and cannot be presented in a single paper; therefore the aim of the paper is to give FE researchers/users only an encyclopaedic view of the different possibilities that exist today in the various fields mentioned above. An appendix included at the end of the paper presents a bibliography on finite element applications in material processing for 1994‐1996, where 1,370 references are listed. This bibliography is an updating of the paper written by Brannberg and Mackerle which has been published in Engineering Computations, Vol. 11 No. 5, 1994, pp. 413‐55.
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Constantinos-Vasilios Priporas
- Explain what a smart consumer is through Generation Z views
- Understanding the nature of decision-making process with the use of smart technologies
Abstract
Learning Outcomes
Explain what a smart consumer is through Generation Z views
Understanding the nature of decision-making process with the use of smart technologies
Explain what a smart consumer is through Generation Z views
Understanding the nature of decision-making process with the use of smart technologies
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Jiang Xie, Haolei Mou, Xuan Su and Zhenyu Feng
This paper aims to present an evaluation method for energy-absorption characteristics of thin-walled composite structures with random uncertain parameters.
Abstract
Purpose
This paper aims to present an evaluation method for energy-absorption characteristics of thin-walled composite structures with random uncertain parameters.
Design/methodology/approach
The mechanical properties of T700/3234 are obtained by material performance tests and energy-absorption results are obtained by quasi-static crushing tests of thin-walled composite circular tubes. The indicators of triggering specific load (TSL) and specific energy absorption (SEA) are introduced and calculated to determine the energy-absorption characteristics and validate the probability finite element analysis model. The uncertainty in the parameters contain the machining tolerance for the thickness and inner diameter of composite circular tubes and are associated with the composite material system. The Plackett–Burman method is used to choose the measurement parameters. Then, the response surface method is used to build a second-order function of random uncertain parameters versus TSL/SEA, and the Monte Carlo method is finally used to obtain the probabilities of TSL and SEA.
Findings
The finite element models can accurately simulate the initial peak load, load-displacement curve and SEA value. The random uncertain parameter method can be used to evaluate the energy-absorption characteristics of thin-walled composite circular tubes.
Practical implications
The presented evaluation method for energy-absorption characteristics of thin-walled composite structures is an approach that considers uncertain parameters to increase the simulation accuracy and decrease the computational burden.
Originality/value
This methodology considers uncertain parameters in evaluating the energy-absorption characteristics of thin-walled composite structures, and this methodology can be applied to other thin-walled composite structures.
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Describes how to develop a visual interactive simulation model forflexible manufacturing systems. SIMPLE_1, an integrated modellingenvironment, is selected as the simulation…
Abstract
Describes how to develop a visual interactive simulation model for flexible manufacturing systems. SIMPLE_1, an integrated modelling environment, is selected as the simulation language due to several of its innovative features. A physical simulator for a flexible manufacturing system is also chosen as the target to demonstrate the modelling process of the visual interactive simulation. The results of this study may provide industrial designers with a design and planning tool.
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Charles Luo, Dongli Zhang, Kevin Linderman and John Ni
Manufacturers face increasing demands to address inefficiencies and improve environmental performance across their supply chains. However, there remains a significant gap in…
Abstract
Purpose
Manufacturers face increasing demands to address inefficiencies and improve environmental performance across their supply chains. However, there remains a significant gap in empirical research examining how collaboration in the supply chain affects various environmental practices and their consequent impacts on performance. This study aims to address the gap by examining how shared goals and vision drives compliance-oriented and prevention-oriented practices, subsequently affecting environmental performance and operational costs—critical for fostering antifragility and resilience in today’s environment.
Design/methodology/approach
An empirical study has been performed based on a sample of survey data from 279 manufacturers from fifteen countries and regions. Applying structural equation modeling analysis to the sample dataset, this study examines the mediating role of two distinct types of environmental practices between shared goals and visions and manufacturers’ environmental performance and operational cost.
Findings
This study delineates distinct pathways through which shared goals and vision affect various types of environmental practices, and consequently lead to different performance outcomes: (1) environmental impact of manufacturing activities depends on the collective efforts of the manufacturers and their supply chain partners; (2) shared goals and vision among supply chain partners facilitates both environmental performance and operational cost through prevention-oriented practice; (3) shared goals and vision in supply chain benefits operational cost performance primarily through prevention-oriented practice, but less likely through compliance-oriented practice.
Practical implications
This study reveals two distinct pathways through which the shared goals and vision impact various performance outcomes, providing valuable guidance to businesses aiming to balance operational cost and environmental performance — crucial for resilience in today's turbulent environment.
Originality/value
This study not only corroborates existing theories of the Natural Resource-Based View and collaborative networks but also provides a detailed depiction of how collaboration across the supply chain promotes a diverse range of environmental practices and yields varied performance outcomes. It offers vital insights for supply chain participants to effectively navigate environmental challenges, enabling them to cultivate resilience and proactively address environmental issues.