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1 – 7 of 7Maria da Graça Carvalho and Pedro Jorge Coelho
A fully three‐dimensional model has been applied to an oil‐fired water tube boiler in order to predict the flow, temperature, mixture fraction, species concentrations and the heat…
Abstract
A fully three‐dimensional model has been applied to an oil‐fired water tube boiler in order to predict the flow, temperature, mixture fraction, species concentrations and the heat flux distributions to the furnace walls. The partial differential equations governing conservation of mass, momentum and energy as well as those describing the combustion phenomena are discretized by a finite volume method and solved numerically. Radiative heat transfer is handled by the discrete transfer method. Predicted results are presented and compared with experimental data for the heat fluxes. The results have suggested that 3‐D models of the present kind can be used with some confidence for design calculations.
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.
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João Morgado, Inês Flores-Colen, Jorge de Brito and Ana Silva
The purpose of this paper is to propose a maintenance programme for flat roofs in existing buildings, based on the inspection of 26 buildings in-service conditions, located in the…
Abstract
Purpose
The purpose of this paper is to propose a maintenance programme for flat roofs in existing buildings, based on the inspection of 26 buildings in-service conditions, located in the Lisbon region, in Portugal. A proactive maintenance of flat roofs in existing buildings allows reducing their pathology, thus improving their performance and service life.
Design/methodology/approach
The maintenance plan was established based on the degradation state of the maintenance source elements (MSEs) analysed, the aggressiveness of the surrounding environment and the age of the roofs and maintenance actions carried out during the roofing systems’ life cycle.
Findings
The maintenance plan proposed in this study includes the prioritization of the interventions, the definition of the required maintenance operations and the definition of the frequency of the intervention, considering the service lives of the MSEs.
Research limitations/implications
The study addresses only roofs located in the Lisbon area. Even though a relatively large sample of 26 roofs was used, the findings and conclusions can clearly be extrapolated for a much wider scope.
Practical implications
The maintenance plan proposed in this study considers a planning of proactive maintenance operations to continuously and effectively monitor all the relevant MSE.
Originality/value
This plan allows minimizing the incidence and spread of defects, thus enabling the optimization of resources, reducing the costs of the entire maintenance system and improving the quality of the built environment.
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Ana María Barrera-Rodríguez, Paola Andrea Echeverri-Gutiérrez, Isabel Redondo-Ramírez and Leidy Hernández-Ramírez
This article develops a review of the university social responsibility literature to identify the most influential countries, authors, journals, and institutions, their structure…
Abstract
Purpose
This article develops a review of the university social responsibility literature to identify the most influential countries, authors, journals, and institutions, their structure, and research lines.
Design/methodology/approach
The review was carried out from a bibliometric and network analysis of documents published in the Web of Science database.
Findings
In total, 192 documents were found that were scientifically mapped in this field. From the network analysis, four research perspectives were identified: strategic impact management policy, user and its stakeholders, service-learning and its contribution to user, and theories, approaches, and strategies of University Social Responsibility (USR). Finally, the agenda for future research are presented.
Originality/value
The present work carries out a bibliometric and network analysis that seeks to contribute to the literature on USR, identifying its current perspectives and future lines of research.
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Augusta Ferreira, João Carvalho and Fátima Pinho
The main purpose of this paper is to evaluate if, motivated by political competition, municipalities engage in earnings management practices through discretionary accruals.
Abstract
Purpose
The main purpose of this paper is to evaluate if, motivated by political competition, municipalities engage in earnings management practices through discretionary accruals.
Design/methodology/approach
Quantitative methodology.
Findings
Results indicate that, in those municipalities where political competition is greatest, there is a greater tendency to report positive net earnings close to zero. This study also indicates that for such purpose, discretionary accruals are used.
Originality/value
The purpose of this paper is to respond to the lack of information in the area of earnings management in the public sector, to be able to evaluate responsibility, performance and efficiency regarding the allocation of public resources and the degree of satisfaction of citizens/voters' needs-accountability.
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Felipe de Oliveira Simoyama, Lívia Rodrigues Tomás, Felipe Matheus Pinto, Luiz Leduino Salles-Neto and Leonardo Bacelar Lima Santos
A sustainable transportation system should represent a win-win situation: minimizing transport's impact on the environment and reducing natural disasters' effects on…
Abstract
Purpose
A sustainable transportation system should represent a win-win situation: minimizing transport's impact on the environment and reducing natural disasters' effects on transportation. A well-distributed set of rain gauges is crucial for monitoring services in smart cities. However, those services should consider the uncertainties about the registers of rainfall impacts. In this paper, the authors present a case study of optimal rain gauge location based on an actual database of rainfall events with impacts on urban mobility in the city of Sao Paulo (Brazil).
Design/methodology/approach
This paper presents a maximal covering location formulation and proposes a robustness analysis considering spatial location perturbations.
Findings
In this case study, the robustness of the objective function is above 99.99%. The robustness for the number of covered demand points is 88.93%, and the frequency associated with every candidate is between 11.71% and 69.49%.
Originality/value
Incorporating spatial uncertainties on coverage problems is essential to provide stakeholders more realistic supporting tools and to draw different possible scenarios.
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To provide a selective bibliography for researchers working with bulk material forming (specifically the forging, rolling, extrusion and drawing processes) with sources which can…
Abstract
Purpose
To provide a selective bibliography for researchers working with bulk material forming (specifically the forging, rolling, extrusion and drawing processes) with sources which can help them to be up‐to‐date.
Design/methodology/approach
A range of published (1996‐2005) works, which aims to provide theoretical as well as practical information on the material processing namely bulk material forming. Bulk deformation processes used in practice change the shape of the workpiece by plastic deformations under forces applied by tools and dies.
Findings
Provides information about each source, indicating what can be found there. Listed references contain journal papers, conference proceedings and theses/dissertations on the subject.
Research limitations/implications
It is an exhaustive list of papers (1,693 references are listed) but some papers may be omitted. The emphasis is to present papers written in English language. Sheet material forming processes are not included.
Practical implications
A very useful source of information for theoretical and practical researchers in computational material forming as well as in academia or for those who have recently obtained a position in this field.
Originality/value
There are not many bibliographies published in this field of engineering. This paper offers help to experts and individuals interested in computational analyses and simulations of material forming processes.
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