Nick Foster and Dimitri Metaxas
A software package is developed for the modelling and animation of viscous incompressible fluids. The full time‐dependent Navier‐Stokes equations are used to simulate 2D and 3D…
Abstract
A software package is developed for the modelling and animation of viscous incompressible fluids. The full time‐dependent Navier‐Stokes equations are used to simulate 2D and 3D incompressible fluid phenomena which include shallow and deep fluid flow, transient dynamic flow, vorticity and splashing in simulated physical environments. The package also allows the inclusion of variously shaped and spaced static or moving obstacles that are fully submerged or penetrate the fluid surface. Stable numerical analysis techniques based on finite‐differences are used for the solution of the Navier‐Stokes equations. To model free‐surface fluids, a technique based on the Marker‐and‐Cell method is presented. Based on the fluid’s pressure and velocities obtained from the solution of the Navier‐Stokes equations this technique allows modelling of the fluid’s free surface either by solving a surface equation of by tracking the motion of marker particles. The latter technique is suitable for visualization of splashing and vorticity. Furthermore, an editing tool is developed for easy definition of a physical‐world which includes obstacles, boundaries and fluid properties such as viscosity, initial velocity and pressure. Using the editor, complex fluid simulations can be performed without prior knowledge of the underlying fluid dynamics equations. Finally, depending on the application fluid rendering techniques are developed using standard Silicon Graphics workstation hardware routines.
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Erik Cateriano-Arévalo, Saud Alrakhayes, Liz Foote, Tamanna Hussain, Krystle Lai and Lucy Nyundo
This study aims to mark the 50th anniversary of social marketing as an innovative social change discipline; this viewpoint reviews “epistemological diversity” within social…
Abstract
Purpose
This study aims to mark the 50th anniversary of social marketing as an innovative social change discipline; this viewpoint reviews “epistemological diversity” within social marketing and calls for its incorporation in the expansion of the discipline.
Design/methodology/approach
Cognisant of the visible (e.g., gender, age, race) and invisible (e.g., epistemology, experience, socioeconomic status) dimensions of diversity, this viewpoint focuses on one invisible dimension of diversity – epistemology. Using secondary data, an epistemological review of social marketing is undertaken by selecting five aspects that serve as potential indicators: professional associations, global conferences, education and training, research and publication and practice. Several recommendations are made to expand epistemological diversity in social marketing.
Findings
The epistemological review of diversity within social marketing reveals disparities between the Global North and South. These disparities are due to varying opportunities for participation in associations, conferences, education and training, and research and publication. In addition, there exist “hidden” social change practitioners who implement programmes in the Global South that are consistent with social marketing practice, but continue to be unchronicled and unheralded.
Originality/value
For many years, social marketing scholars and practitioners have been working to expand the boundaries of the discipline, with a focus on theory and application. Although the authors acknowledge that diversity and equity are inherently central to this discipline, epistemological diversity, specifically as linked to the geographies of the Global South, has been largely overlooked. Our viewpoint nudges the social marketing community into including epistemological diversity in the ongoing discourse around broadening and deepening the discipline of social marketing.
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Augustinos I. Dimitras, Ioannis Dokas, Olga Mamou and Eleftherios Spyromitros
The scope of this research is to investigate performing loan efficiency for fifty European banks during the period 2008–2017.
Abstract
Purpose
The scope of this research is to investigate performing loan efficiency for fifty European banks during the period 2008–2017.
Design/methodology/approach
The study is structured as a two-stage analysis of performing loan efficiency and its driving factors. In the first stage of the proposed methodology “Data Envelopment Analysis” is used to estimate performing loan efficiency for each bank included in the sample. A bootstrap statistical procedure enhances the findings. In the second stage, the impact of other factors on the efficiency scores of loan performance using tobit regression is investigated.
Findings
The results are consistent with the findings of the individual banks' financial analyses. According to the findings of DEA implementation, the evaluated banks may enhance their cost efficiency by 39% on average. In addition, the results indicate that loan efficiency performance improves after 2015, coinciding with the business cycle's upward trend. The tobit regression is employed in the second stage to examine the influence of bank-related and macroeconomic factors on banks' loan management efficiency. According to the findings of the tobit regression, three factors, namely the capital adequacy ratio, GDP per capita and managerial inefficiency, have a substantial influence on performing loan efficiency.
Originality/value
This research investigates the effectiveness of European economic policy in protecting the European banking system from the consequences of the sovereign debt crisis in several euro area members. The results highlight the distance of the Eurozone from the level of the ‘optimal currency area’.