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Article
Publication date: 3 January 2017

Patrick Dular, Patrick Kuo-Peng, Mauricio Valencia Ferreira da Luz and Laurent Krahenbuhl

This paper aims to develop a methodology for progressive finite element (FE) modeling of transformers, from simple to complex models of both magnetic cores and windings.

Abstract

Purpose

This paper aims to develop a methodology for progressive finite element (FE) modeling of transformers, from simple to complex models of both magnetic cores and windings.

Design/methodology/approach

The progressive modeling of transformers is performed via a subproblem (SP) FE method. A complete problem is split into SPs with different adapted overlapping meshes. Model refinements are performed from ideal to real flux tubes, one-dimensional to two-dimensional to three-dimensional models, linear to nonlinear materials, perfect to real materials, single wire to volume conductor windings and homogenized to fine models of cores and coils, with any coupling of these changes.

Findings

The proposed unified procedure efficiently feeds each SP via interface conditions (ICs), which lightens mesh-to-mesh sources transfers and quantifies the gain given by each refinement on both local fields and global quantities, with a clear view on its significance to justify its usefulness, if any. It can also help in education with a progressive understanding of the various aspects of transformer designs.

Originality/value

Models of different accuracy levels are sequenced with successive additive corrections supported by different adapted meshes. The way the sources act at each correction step, up to the full models with their actual geometries, is given a particular care and generalized, allowing the proposed unified procedure. For all the considered corrections, the sources are always of IC type, thus only needed in layers of FE along boundaries, which lightens the required mesh-to-mesh projections between subproblems.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 36 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 April 2007

Mauricio Ferreira and Gonzalo Bravo

This study examined the determinants of attendance at the Chilean national soccer tournaments between 1990 and 2002. A multilevel model approach was taken to estimate the effects…

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Abstract

This study examined the determinants of attendance at the Chilean national soccer tournaments between 1990 and 2002. A multilevel model approach was taken to estimate the effects of several factors, including unobserved sources, hypothesised to influence attendance in Chile. Results regarding team success, team division, population, stadium size and habitual persistence were found to influence professional soccer attendance; other factors such as admission price, age of team, international success, availability of soccer teams in the same vicinity and stadium ownership did not.

Details

International Journal of Sports Marketing and Sponsorship, vol. 8 no. 3
Type: Research Article
ISSN: 1464-6668

Keywords

Article
Publication date: 1 October 2006

Gregg Bennett, Mauricio Ferreira, Yosuke Tsuji, Ron Siders and Beth Cianfrone

This paper examines the effects of advertising type and antecedents of attitude towards advertising in general (AG) on individuals' responses to advertising in a sports broadcast…

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Abstract

This paper examines the effects of advertising type and antecedents of attitude towards advertising in general (AG) on individuals' responses to advertising in a sports broadcast setting. Both AG antecedents and advertising type were assessed using Brackett and Carr's (2001) model. Our results indicate that individual responses to advertising vary according to the type of advertising (television commercials, virtual ads by location).

Details

International Journal of Sports Marketing and Sponsorship, vol. 8 no. 1
Type: Research Article
ISSN: 1464-6668

Keywords

Article
Publication date: 7 September 2015

Patrick Dular, Mauricio V. Ferreira da Luz, Patrick Kuo-Peng and Laurent Krähenbühl

The purpose of this paper is to develop a subproblem finite element method for progressive modeling of lamination stacks in magnetic cores, from homogenized solutions up to…

Abstract

Purpose

The purpose of this paper is to develop a subproblem finite element method for progressive modeling of lamination stacks in magnetic cores, from homogenized solutions up to accurate eddy current distributions and losses.

Design/methodology/approach

The homogenization of lamination stacks, subject to both longitudinal and transversal magnetic fluxes, is first performed and is followed by local correction subproblems in certain laminations separately, surrounded by their insulating layers and the remaining laminations kept homogenized. The sources for the local corrections are originally defined via interface conditions to allow the coupling between homogenized and non-homogenized portions.

Findings

The errors proper to the homogenization model, which neglects fringing effects, can be locally corrected in some selected portions via local eddy current subproblems considering the actual geometries and properties of the related laminations. The fineness of the mesh can thus be concentrated in these portions, while keeping a coupling with the rest of the laminations kept homogenized.

Research limitations/implications

The method has been tested on a 2D case having linear material properties. It is however directly applicable in 3D. Its extension to the time domain with non-linear properties will be done.

Originality/value

The resulting subproblem method allows accurate and efficient calculations of eddy current losses in lamination stacks, which is generally unfeasible for real applications with a single problem approach. The accuracy and efficiency are obtained thanks to a proper refined mesh for each subproblem and the reuse of previous solutions to be locally corrected only acting in interface conditions. Corrections are progressively obtained up to accurate eddy current distributions in the laminations, allowing to improve the resulting global quantities: the Joule losses in the laminations, and the resistances and inductances of the surrounding windings.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 5 May 2015

Patrick Dular, Laurent Krähenbühl, Mauricio V. Ferreira da Luz, Patrick Kuo-Peng and Christophe Geuzaine

– The purpose of this paper is to develop a subproblem method (SPM) for progressive modeling of inductors, with model refinements of both source conductors and magnetic cores.

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Abstract

Purpose

The purpose of this paper is to develop a subproblem method (SPM) for progressive modeling of inductors, with model refinements of both source conductors and magnetic cores.

Design/methodology/approach

The modeling of inductors is split into a sequence of progressive finite element (FE) SPs. The source fields (SFs) generated by the source conductors alone are calculated at first via either the Biot-Savart (BS) law or FEs. With a novel general way to define the SFs via interface conditions (ICs), to lighten their evaluation process, the associated reaction fields for each added or modified region, mainly the magnetic cores, and in return for the source conductor regions themselves when massive, are then calculated with FE models. Changes of magnetic regions go from perfect magnetic properties up to volume linear and nonlinear properties, and from statics to dynamics.

Findings

For any added or modified region, the novel proposed ICs to define the SFs appear of general usefulness, which opens the method to a wide range of model improvements.

Originality/value

The resulting SPM allows efficient solving of parameterized analyses thanks to a proper mesh for each SP and the reuse of previous solutions to be locally corrected, in association with novel SF ICs that strongly lighten the quantity of BS evaluations. Significant corrections are progressively obtained for the fields, up to nonlinear magnetic core properties and skin and proximity effects in conductors, and for the related inductances and resistances.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 3
Type: Research Article
ISSN: 0332-1649

Keywords

Book part
Publication date: 23 March 2017

Barbara de Lima Voss, David Bernard Carter and Bruno Meirelles Salotti

We present a critical literature review debating Brazilian research on social and environmental accounting (SEA). The aim of this study is to understand the role of politics in…

Abstract

We present a critical literature review debating Brazilian research on social and environmental accounting (SEA). The aim of this study is to understand the role of politics in the construction of hegemonies in SEA research in Brazil. In particular, we examine the role of hegemony in relation to the co-option of SEA literature and sustainability in the Brazilian context by the logic of development for economic growth in emerging economies. The methodological approach adopts a post-structural perspective that reflects Laclau and Mouffe’s discourse theory. The study employs a hermeneutical, rhetorical approach to understand and classify 352 Brazilian research articles on SEA. We employ Brown and Fraser’s (2006) categorizations of SEA literature to help in our analysis: the business case, the stakeholder–accountability approach, and the critical case. We argue that the business case is prominent in Brazilian studies. Second-stage analysis suggests that the major themes under discussion include measurement, consulting, and descriptive approach. We argue that these themes illustrate the degree of influence of the hegemonic politics relevant to emerging economics, as these themes predominantly concern economic growth and a capitalist context. This paper discusses trends and practices in the Brazilian literature on SEA and argues that the focus means that SEA avoids critical debates of the role of capitalist logics in an emerging economy concerning sustainability. We urge the Brazilian academy to understand the implications of its reifying agenda and engage, counter-hegemonically, in a social and political agenda beyond the hegemonic support of a particular set of capitalist interests.

Details

Advances in Environmental Accounting & Management: Social and Environmental Accounting in Brazil
Type: Book
ISBN: 978-1-78635-376-4

Keywords

Article
Publication date: 18 April 2016

Jose Paulo Marques dos Santos, Marisa Martins, Hugo Alexandre Ferreira, Joana Ramalho and Daniela Seixas

This paper aims to explore brain-based differences in national and own-label brands perceptions. Because price is a differentiating characteristic, able to discriminate between…

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Abstract

Purpose

This paper aims to explore brain-based differences in national and own-label brands perceptions. Because price is a differentiating characteristic, able to discriminate between national and own-label brands, its influence is also studied.

Design/methodology/approach

The study uses the Save Holdings Or Purchase (SHOP) task with functional magnetic resonance imaging to explore the differences in brain functioning for national versus own-label branded products.

Findings

For the same product, the higher priced national brands and the lower priced own-label brands lead to more buying decisions. It is also found that there are brain structures that are more active/deactive for national than for own-label brands, both marked with real market prices. Price is a powerful driver of buying decisions and has its neural correlates. Parietal regions activate when brand information is subtracted from brand-plus-price information. The most surprising finding is that visual and visual associative areas are involved in the contrasts between branded products marked with switched prices and marked with real market prices.

Originality/value

The activation/deactivation brain patterns suggest that accepted models of brain functioning are not suitable for explaining brand decisions. Also, to our knowledge, this is the first time that a study directly addresses the brain’s functioning when subjects are stimulated with national versus own-label brands. It paves the way for a new approach to understanding how such brand categories are perceived, revealing the neural origins of the associated psychological processes.

Details

Journal of Product & Brand Management, vol. 25 no. 2
Type: Research Article
ISSN: 1061-0421

Keywords

Book part
Publication date: 10 November 2016

Wanderley Marchi Júnior

In this chapter, I aim to present a review on the constitution of the sociology of sport as a subfield in Brazil. To do so, I start with the debate over its history, the current…

Abstract

In this chapter, I aim to present a review on the constitution of the sociology of sport as a subfield in Brazil. To do so, I start with the debate over its history, the current status of this academic area and the factors that led to its development. Additionally, I present the main organizations, funding institutions, and the events that support this field. I briefly identify the main postgraduate programs in the country that enable sociological research in sport, mapping their distribution geographically. Next, I present some introductory works of reference on the sociology of sport in Brazil, as well as discussing some authors that were and are key to the field. I highlight the main topics of interest in Brazilian sociology of sport as well as their methodological models and the main theoretical bases of analysis used by late and early career researchers. In conclusion, I evaluate the comprehension and the representation of sport in society and in the academy, pointing to some future perspectives of development and consolidation of the sociology of sport in Brazil.

Details

Sociology of Sport: A Global Subdiscipline in Review
Type: Book
ISBN: 978-1-78635-050-3

Keywords

Book part
Publication date: 20 March 2023

Juan E. Santarcángelo and Juan Manuel Padín

Following a successful debt-renegotiation process in the mid-2000s, Argentina consolidated a path of growth and debt relief. The outbreak of the global financial crisis in…

Abstract

Following a successful debt-renegotiation process in the mid-2000s, Argentina consolidated a path of growth and debt relief. The outbreak of the global financial crisis in 2007–2009 and other domestic imbalances altered the economic scenario. In this context, the authorities tried to return to global financial markets, but legal conflict with vulture funds made that option unpalatable. In 2015, the triumph of a right-wing political coalition restored the dominance of neoliberal economic policies, including the return to debt and equity markets. The subsequent cycle of indebtedness and capital flight faced by Argentina not only unleashed a major crisis but also caused the return of the International Monetary Fund, which granted the largest lending arrangement to a single country in its history. The aims of this chapter are to analyze the winding cycle of debt reduction and overindebtedness experienced by Argentina between 2001 and 2022; to examine the set of structural factors as well as the role of certain domestic and foreign actors; and to consider the long-term effects of external indebtedness and some lessons that can be drawn for other countries in the Global South.

Details

Imperialism and the Political Economy of Global South’s Debt
Type: Book
ISBN: 978-1-80262-483-0

Keywords

Open Access
Article
Publication date: 8 November 2021

Mauricio Santos and Walesska Schlesinger

This paper aims to test the effects of brand experience and brand love on brand loyalty and willingness to pay a premium price in streaming television services.

12608

Abstract

Purpose

This paper aims to test the effects of brand experience and brand love on brand loyalty and willingness to pay a premium price in streaming television services.

Design/methodology/approach

Structural equation modelling was used to assess the proposed theoretical model drawing on data from 220 subscribers of a well-known TV streaming brand services (Netflix).

Findings

The results revealed that brand experience and brand love have a significant direct impact on brand loyalty and willingness to pay a premium price in streaming TV services. Also, the impact brand experience has on brand loyalty and on willingness to pay a premium price is partially mediated by brand love.

Practical implications

In the streaming television industry, brand managers can create more meaningful experiences that create strong and emotional bonds with users, thereby increasing loyalty levels and intention to pay a premium price. Also, brand managers should consider focusing their efforts to young consumers, as they have a stronger attachment to technology than older generational groups.

Originality/value

This paper enriches the existing literature on brand experience in the entertainment television industry and provides evidence of the role of experience and brand love on brand loyalty and willingness to pay a premium price in services.

Propósito

Este estudio prueba el efecto que tiene la experiencia de marca y el amor a la marca en la lealtad a la marca y la disposición a pagar un precio más elevado en las plataformas de servicios de streaming.

Diseño/metodología/enfoque

Un modelo de ecuaciones estructurales (SEM) ha sido utilizado para contrastar el modelo teórico propuesto basándose en datos de 220 suscriptores de una conocida marca de servicios de streaming (Netflix).

Hallazgos

Los resultados revelan que la experiencia de marca y el amor a la marca tienen un impacto significativo y directo en la lealtad a la marca y la disposición a pagar un precio más elevado en el contexto de televisión por streaming. También, el impacto que tiene la experiencia de marca en la lealtad a la marca y en la disposición para pagar un precio más elevado es parcialmente mediado por el amor a la marca.

Implicaciones prácticas

En el contexto de la industria de entretenimiento (televisión por streaming), los gerentes de marca pueden diseñar significativas experiencias que sean capaces de crear fuertes lazos emocionales con sus usuarios, incrementando sus niveles de lealtad y disposición a pagar más. Además, los gerentes de marca deben considerar enfocarse al segmento de consumidores jóvenes, pues ellos tienen más apego a la tecnología que las personas mayores.

Originalidad/valor

Este estudio enriquece la literatura existente sobre experiencia de marca en el sector del entretenimiento televisivo aportando evidencia del rol de la experiencia y del amor hacia la marca en la lealtad y la disposición a pagar un precio elevado.

目的:

本研究检验了品牌体验和品牌喜爱对流媒体电视服务的品牌忠诚度和高价支付意愿的影响。

设计/方法/途径:

结构方程模型(SEM)被用来评估本文所提出的理论模型, 该模型的数据来自于一个知名电视流媒体品牌服务方(Netflix)的220名订阅用户。

结果:

本文的结果显示, 品牌体验和品牌喜爱对流媒体电视服务的品牌忠诚度和高价支付意愿有显著的直接影响。同时, 部分品牌体验对品牌忠诚度和高价支付意愿的影响会被品牌喜爱所调节。

实践意义:

在流媒体电视行业中, 品牌经理可以创造更多有意义的体验, 与用户建立强大的情感联系, 从而提高忠诚度和高价支付意愿。同时, 品牌经理应该考虑将他们的工作重点放在年轻消费者身上, 因为他们比老一辈群体对科技有更强的依恋。

原创性/价值:

本文丰富了关于娱乐电视行业品牌体验的现有文献, 并提供证据证明了体验和品牌喜爱对品牌忠诚度和高价支付意愿的作用。

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