The aims of this study were to investigate the effect of using a wall‐normal, 2D micro zero‐net‐mass‐flux (ZNMF) jet located at the leading edge of a NACA 0015 airfoil to actively…
Abstract
Purpose
The aims of this study were to investigate the effect of using a wall‐normal, 2D micro zero‐net‐mass‐flux (ZNMF) jet located at the leading edge of a NACA 0015 airfoil to actively control flow separation and enhance lift.
Design/methodology/approach
Experiments were conducted over a two‐dimensional airfoil in a water tunnel at a Reynolds number of 3.08 × 104 for the parametric investigation and the detailed multigrid cross‐correlation digital particle image velocimetry (MCCDPIV) measurements. Flow visualisation experiments were carried out at a lower Reynolds number of 1.54 × 104.
Findings
The largest lift increase was observed when a non‐dimensional frequency of 1.3 and an oscillatory momentum blowing coefficient of 0.14 per cent was employed. Under these forcing conditions the stall angle of the airfoil was mitigated from an angle of attack of 10o to one of 18o, resulting in a maximum lift coefficient increase of 46 per cent above the uncontrolled lift coefficient. Planar laser induced fluoroscopy and MCCDPIV revealed that the lift increments were the result of the generation of a train of large‐scale, spanwise lifting vortices that convected over the suction surface of the airfoil. The presence of these structures resulted in the flow seemingly remaining attached to the upper surface of the airfoil for a wider range of angles of attack.
Originality/value
This study is significant as it provides quantitative experimental data, which clearly demonstrates the effectiveness of a 2D micro ZNMF jet in controlling flow separation of a NACA 0015 airfoil at high angles of attack and thus, enhancing lift. Furthermore, the flow visualisations and MCCDPIV measurements have provided insight into the mechanisms responsible for the improvement in lift. This new understanding has applications beyond the NACA 0015 airfoil used in this study.
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Erik Cateriano-Arévalo, Jorge Soria Gonzáles (Pene Beso), Richard Soria Gonzales (Xawan Nita), Néstor Paiva Pinedo (Sanken Bea), Ross Gordon, Maria Amalia Pesantes and Lisa Schuster
Respectful co-production is one of the principles of ethical Indigenous research. However, this participatory approach has yet to be thoroughly discussed in social marketing. This…
Abstract
Purpose
Respectful co-production is one of the principles of ethical Indigenous research. However, this participatory approach has yet to be thoroughly discussed in social marketing. This study aims to provide reflections and recommendations for respectful co-production of research with Indigenous people in social marketing.
Design/methodology/approach
This study draws upon case study reflections and lessons learned from a research program respectfully co-produced with members of the Shipibo-Konibo Indigenous group of the Peruvian Amazon called the Comando Matico. The authors focus on the challenges and strategies for respectful co-production during different stages of the research process, including consultation, fieldwork and co-authoring articles. The authors foreground how their Comando Matico co researchers infused the research process with Shipibo knowledge.
Findings
The authors reflect on three recommendations concerning 1) respectful co-production, 2) power dynamics and 3) facilitating co-authorship. Social marketers interested in respectful co production of research with Indigenous people may need to adopt a flexible and practical approach that considers the characteristics of the context and Indigenous co-researchers.
Originality/value
This study contributes to the discussion about the importance of respectful co-production of research with Indigenous people to ensure it accounts for their needs and wants.
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Gisela Alves, Arnaldo Coelho and Vítor Roque
Many destination marketers organise events to draw economic benefits over the short and long term. However, this chapter suggests that events can result in more than economic…
Abstract
Many destination marketers organise events to draw economic benefits over the short and long term. However, this chapter suggests that events can result in more than economic benefits, as they can be used to improve a destination’s branding and image. The authors explain how the organisation and implementation of successful events can enhance the destination’s attributes. They explore the consumer-based brand equity (CBBE) of the event and examine its relationship with other variables, including the destination’s image. Moreover, they maintain that music festivals can enhance the destination’s image and branding, particularly, when the visitors share their positive experiences with others. The authors make reference to two Portuguese events: NOS Primavera Sound event and NOS ALIVE. In conclusion, they imply that such music events are improving the brand equity among customers and adding value to the destination marketing of Portugal.
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Francisco J. Lopez‐Pellicer, Aneta J. Florczyk, Rubén Béjar, Pedro R. Muro‐Medrano and F. Javier Zarazaga‐Soria
There is an open discussion in the geographic information community about the use of digital libraries or search engines for the discovery of resources. Some researchers suggest…
Abstract
Purpose
There is an open discussion in the geographic information community about the use of digital libraries or search engines for the discovery of resources. Some researchers suggest that search engines are a feasible alternative for searching geographic web services based on anecdotal evidence. The purpose of this study is to measure the performance of Bing (formerly Microsoft Live Search), Google and Yahoo! in searching standardised XML documents that describe, identify and locate geographic web services.
Design/methodology/approach
The study performed an automated evaluation of three search engines using their application programming interfaces. The queries asked for XML documents describing geographic web services, and documents containing links to those documents. Relevant XML documents linked from the documents found in the search results were also included in the evaluation.
Findings
The study reveals that the discovery of geographic web services in search engines does not require the use of advanced search operators. Data collected suggest that a resource‐oriented search should combine simple queries to search engines with the exploration of the pages linked from the search results. Finally the study identifies Yahoo! as the best performer.
Originality/value
This is the first study that measures and compares the performance of major search engines in the discovery of geographic web services. Previous studies were focused on demonstrating the technical feasibility of the approach. The paper also reveals that some technical advances in search engines could harm resource‐oriented queries.
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Emmanuel Edache Michael, Joy Nankyer Dabel-Moses, Dare John Olateju, Ikoojo David Emmanuel and Vincent Edache Michael
In this chapter, we conduct a metadata analysis of articles published in accounting, business and finance journals ranked by Australian Business Dean Council (ABDC), and…
Abstract
In this chapter, we conduct a metadata analysis of articles published in accounting, business and finance journals ranked by Australian Business Dean Council (ABDC), and benchmarked against the Chartered Association of Business Schools (ABS) ranking, that discuss firm- and country-level greenhouse gas (GHG) emission practices and reporting. Number of publications on GHG research, research methods, number of citations and ratio, across countries and continents are some of the topics we cover. We employ a list of articles on accounting, business and finance journals ranked A* and A in the ABDC journal rankings from 2015 to 2022. The study uses a structured literature review to analyse 74 papers on GHG reporting practices at the firm- and country level. Although this line of enquiry is still nascent and developing, the study found underrepresentation of Africa and the Middle East in GHG literature generally. In addition, majority of the articles examined also concentrate on quantitative methods. Most of the articles on GHG research are A-ranked in the ABDC ranking scheme. It was also found that few studies focus on the countries and companies with the highest emissions. While there has been some progress in interrogating GHG across the globe, there is still much room for further research. A key area of future research is exploring the GHG reporting practices in the African and the Middle Eastern sub-regions. There is also a need to examine countries and companies with high emissions. A further study needs to explore the benefits of other research methods in addition to quantitative methods, as different research methods could yield different insights that would enhance research-based conclusions.
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Krista M. Soria, Linnette Werner, Christine VeLure Roholt and Anna Capeder
Thepurposeofthisarticle wastoexaminethe effectsofstrengths-basedapproaches in co-curricularandcurricularleadershiponfirst-yearstudents’holisticthriving,academicthriving, social…
Abstract
Thepurposeofthisarticle wastoexaminethe effectsofstrengths-basedapproaches in co-curricularandcurricularleadershiponfirst-yearstudents’holisticthriving,academicthriving, social thriving, and psychological thriving. We used propensity score matching and regression analyses with survey data from the Thriving Quotient, which was administered to first-year students at a large, public research university(n = 548). The results suggest students’ enrollment in a strengths-based leadership minor course was associated with higher levels of thriving in social, academic, and psychological domains. Students’ participation in strengths-based student organizationswasassociatedwithhigherthrivinginsocialdomains,whileconcurrentenrollment in the strengths-based leadership class and participation in strengths-based student organizations was associated with significantly higher holistic thriving, social thriving, and psychological thriving.
Dimitris Gkiolas, Demetri Yiasemides and Demetri Mathioulakis
The complex flow behavior over an oscillating aerodynamic body, e.g. a helicopter rotor blade, a rotating wind turbine blade or the wing of a maneuvering airplane involves…
Abstract
Purpose
The complex flow behavior over an oscillating aerodynamic body, e.g. a helicopter rotor blade, a rotating wind turbine blade or the wing of a maneuvering airplane involves combinations of pitching and plunging motions. As the parameters of the problem (Re, St and phase difference between these two motions) vary, a quasi-steady analysis fails to provide realistic results for the aerodynamic response of the moving body, whereas this study aims to provide reliable experimental data.
Design/methodology/approach
In the present study, a pitching and plunging mechanism was designed and built in a subsonic closed-circuit wind tunnel as well as a rectangular aluminum wing of a 2:1 aspect-ratio with a NACA64-418 airfoil, used in wind turbine blades. To measure the pressure distribution along the wing chord, a number of fast responding transducers were embedded into the mid span wing surface. Simultaneous pressure measurements were conducted along the wing chord for the Reynolds number of 0.85 × 106 for both steady and unsteady cases (pitching and plunging). A flow visualization technique was used to detect the flow separation line under steady conditions.
Findings
Elevated pressure fluctuations coincide with the flow separation line having been detected through surface flow visualization and flattened pressure distributions appear downstream of the flow separation line. Closed hysteresis loops of the lift coefficient versus angle of attack were measured for combined pitching and plunging motions.
Practical implications
The experimental data can be used for improvement of unsteady fluid mechanics problem solvers.
Originality/value
In the present study, a new installation was built allowing the aerodynamic study of oscillating wings performing pitching and plunging motions with prescribed frequencies and phase lags between the two motions. The experimental data can be used for improvement of computational fluid dynamics codes in case that the examined aerodynamic body is oscillating.
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Niki Glaveli, Fotios Vouzas and Myrsine Roumeliotou
The current study provides insights on the application of critical soft TQM practices in primary and secondary education and their impact on teachers' job satisfaction (TJS).
Abstract
Purpose
The current study provides insights on the application of critical soft TQM practices in primary and secondary education and their impact on teachers' job satisfaction (TJS).
Design/methodology/approach
Based on a review of the literature related to TQM application in primary and secondary education, six soft TQM elements were traced as critical to the success of TQM implementation in the school environment: participation/involvement in continuous improvement, teamwork, empowerment, appraisal systems/recognition and reward for quality, training and development (T&D) and leadership (vision/commitment to quality culture). Moreover, their relationship to JS was theoretically founded and empirically tested. An online questionnaire was used as the research instrument. The participants were 200 primary and secondary public school teachers working in urban, semi urban and rural regions of Greece. After assessing the validity and reliability of the measurement scales, multiple regression analysis was applied to test the hypothesized relationships.
Findings
The research findings revealed that leadership and empowerment are the most highly implemented TQM practices in primary and secondary education. Moreover, participation/involvement, appraisal systems/recognition and rewards and leadership were the TQM elements that had a positive association with TJS.
Practical implications
The outcomes of the study are of help to school principals and policy-makers in order to design and implement TQM policies that advance the quality of teaching and the effectiveness of processes in the primary and secondary education system, as well as to satisfy and motivate teachers for continuous improvement.
Originality/value
This was, to the best of our knowledge, the first study that has explored the impact of soft TQM elements on TJS.
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José Soria-García and Ángel Rafael Martínez-Lorente
The purpose of this paper is to investigate how quality culture influences the relationship between total quality management (TQM) and secondary school students’ perceived service…
Abstract
Purpose
The purpose of this paper is to investigate how quality culture influences the relationship between total quality management (TQM) and secondary school students’ perceived service quality (PSQ).
Design/methodology/approach
The authors underpin research to analyse the effect of quality culture and TQM practices on PSQ. The sample included questionnaires completed by 268 teachers and 559 students from 56 secondary schools in the Murcia Region (Spain). The proposed model comprises an exogenous construct (quality culture) and three endogenous ones (two constructs represent the TQM model’s infrastructure practices and core practices, whereas one represents PSQ), and specifies the relations among them. The authors used the variance-based structural equation modeling technique and the partial least squares estimation method to test the hypotheses.
Findings
Its empirical analysis reveals that the quality culture influences the effectiveness of QM practices by suggesting a significant strong effect on infrastructure and core quality practices. In turn, the analysis reveals that these two QM aspects differently have an impact on PSQ. Finally, the mediation analysis results reveal the indirect significant impact of the quality culture on PSQ through the mediator effect of QM practices.
Originality/value
The main contribution of this work is to theoretically explain and empirically prove some mechanisms by which education centers can develop and implement a total quality initiative. The findings provide ideas for management teams about how to personalize TQM practices to achieve optimum performance outcomes.