Search results

This paper aims to present an experimental investigation of an active flow control solution mounted at rear of a sport utility vehicle (SUV) with the objective of drag reduction, thanks to a selection of flow control parameters leading to a pressure increase on the tailgate.

A flow control design of experiments was conducted with a pulsed jet system mounted on the top and sides of the rear window of the vehicle. The wall pressure, instantaneous velocity and drag were measured with this prototype in a wind tunnel. A dynamic modal decomposition (DMD) analysis of the pressure enables to describe the pressure fluctuations. Fluid dynamic computations show relation between pressure and velocity fields.

Measurements with this prototype in the wind tunnel revealed small improvements in drag for the best flow control configurations. This small benefit is because of the core of the upper span wise vortex further away from the rear window than the lower span wise vortex. These small improvements in drag were confirmed with pressure measurements on the rear window and tailgate. The DMD analysis of the surface pressure showed a low frequency pendulum oscillation on the lower area of the tailgate, linked with low velocity frequencies in the shear layers near the tailgate.

Experimental and numerical results show interest to increase pressure at bottom of the rear end of this SUV prototype. The dynamic description of the wall pressure shows importance of flow control solutions reducing pressure fluctuations at low frequencies in the lower area of the tailgate.

Trade in food and other agricultural products is increasingly important across East and Southeast Asia, where high-income Asian economies have driven significant agricultural expansion, and the People's Republic of China's (PRC) momentous growth promises more stimulus to agro-food activity in the region. The PRC is expected to become a net importer of agro-food in the coming decades, which will have significant implications within the region. As its middle class continues to emerge, the resource intensity of food consumption (e.g., meat and dairy) will lead to net imports and require expansion of agricultural capacity elsewhere. Because low-income Southeast Asia is generally seen to be well below its agro-food potential, this situation suggests a significant opportunity for self-directed poverty reduction through regional agro-food market expansion. This chapter reviews the history of high-income Asia and the PRC's emergence in the region's agro-food markets. Finally, the Greater Mekong Subregion's role is analyzed for the potential of Asian agro-food trade to contribute to poverty reduction.

Computable general equilibrium, or CGE, is a well-established numerical simulation technique for evaluating the economy-wide effects of changes in an economic system. It has become very widely used throughout the economics discipline, but is perhaps employed most frequently in the analysis of changes in international trade policy, where changes in tariffs and other taxes are often large and almost always involve multiple sectors and/or regions simultaneously. CGE methods, while certainly not without their limitations, have proved very effective at tracking the myriad of feedback and flow-through effects associated with new regional trading agreements and multilateral trade reforms, and have provided a consistent mechanism of analyzing the effects of changes in trade policy and related areas on a diverse range of economic outcomes.

This paper seeks to deal with the history of Research and Development (R&D) management. It takes the history of the R&D Department of the Royal Philips Electronics of The Netherlands as an example to unravel the dynamics behind industrial R&D management.

This paper is based upon historical and theoretical studies on industrial R&D institutions and research cultures.

The paper proposes that the directors of the Philips R&D Department continually shaped and reshaped the organization in order to retain researchers with creative ideas, and to stimulate innovativeness. The R&D‐management was the outcome of a search process that comprehended a mixture of scientific and industrial (management) skills, knowledge and expertise, which together shaped an industrial research culture. One of the most difficult questions for the research managers was to find a balance between the professional status and motives of individual researchers on the one hand and the Philips company production strategy on the other. Over the years, the research leaders stimulated individual creativity in their own way, taking specific business and economic circumstances into account. They operated during different historical periods that reflect their management ideas.

Nowadays, the Philips research takes place at the High Tech Campus. Its philosophy is based upon Chesbrough's open innovation paradigm. In the discussion of this paper, it is argued that the history of industrial research teaches that the success of this organization, as in the past, will depend upon the management's ability to find a balance between scientific activities and industrial production.

The theory of planned behaviour (TPB) considers the interrelationship between such concepts as beliefs, attitudes, norms, intentions and behaviour (Ajzen, 1991; Ajzen and Fishbein, 1975). Based on a review of academic sources, this paper aims to analyse the efficacy of the TPB for predicting people’s intentions when choosing a travel destination.

Surprisingly, only 15 studies were identified that used TPB to predict the choice of travel destination, though the theory has been used in other areas of tourism analysis.

Mixed results were found in the studies. Therefore, the adequacy of the TPB for predicting travellers’ intentions of choosing a destination may be questioned. However, there is nothing in the TPB suggesting that all the constructs of the model must contribute equally, significantly and simultaneously to behavioural intentions.

To achieve a more comprehensive understanding of the intentions in question, the TPB model may have to be extended to suit different settings. The decision-making process of choosing a destination is a complicated one; therefore, researchers’ attention should not only consider travellers’ intentions but also the direct effect of intentions on the actual behaviour.

We present a new approach that shifts the leverage point of information systems development from problem orientation to opportunity development. Our approach, entitled FormIT, employs a careful focus on enhanced user involvement, concentrating on users as human beings, and attention to users’ needs as opposed to system requirements. As theoretical and methodological foundations, we build on the 4-D cycle model of Appreciative Inquiry and current research on needfinding. Our field experience demonstrates that FormIT shifts the systems development process from being reactive to being proactive, and in turn, enables a smoother implementation of inevitable change, particularly radical change. Moreover, FormIT stimulates the generation of rich local knowledge and helps reveal deep insights into the development process and the overall organization.

This paper presents a methodological analysis of the co-creation and evaluation of “Biobot Academy” social marketing program to promote socio-emotional skills and prosocial behaviour in children, using a Living Lab method. This paper aims to identify how using a Living Lab method can enhance the co-creation and evaluation of a gamified social marketing program with users and stakeholders. To the best of the authors’ knowledge, this paper is the first to apply and further develop a Living Lab framework to guide social marketing program design.

Using a case study method, the Living Lab process was applied during the development of the gamified social marketing program for promoting socio-emotional skills and prosocial behaviour in children. In total, 28 online and in-person sessions over a two-year period led to program co-creation. Guided by a mixed method approach, testing was conducted in a non-randomised waitlist control trial, while qualitative data from in-game data capture, classroom observations and recordings were collected.

The application of the Living Lab method warranted improvements, specifically to the front-end and back-end steps of the existing process. While the non-randomised trial indicated effectiveness of the social marketing program across all outcome measures (self-awareness, empathy and prosocial behaviour intentions) compared to control, qualitative findings showed program improvements were needed on three specific aspects, namely, interactivity, user experience and comprehension.

This study provides methodological guidance for the application of the Living Lab method in other social marketing settings to help co-create innovative social marketing solutions with diverse stakeholder groups.