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The purpose of this study is the characterization of the dramatic variation in the flow scenario occurring at incipient stall conditions on a NACA0015 hydrofoil at moderate Reynolds numbers via the experimental analysis of time- and space-resolved skin-friction maps. The examined flow conditions are relevant for a variety of applications, including renewable energy production and unmanned and micro-aerial vehicles.

Grounding on the global temperature data acquired via temperature-sensitive paint, the proposed methodology adopts two approaches: one to obtain time-resolved, relative skin-friction vector fields by means of an optical-flow-based algorithm and the other one to extract quantitative, time-averaged skin-friction maps after minimization of the dissimilarity between the observed passive transport of temperature fluctuations and that suggested by the Taylor hypothesis.

Through the synergistic application of the proposed methods, the time-dependent evolution of the incipient stall over the hydrofoil suction side is globally described by firstly identifying the trailing edge separation at an angle of attack (AoA) AoA = 11.5°, and then by capturing the onset of upstream oriented, mushroom-like structures at AoA = 13°. The concomitant occurrence of both scenarios is found at the intermediate incidence AoA = 12.2°.

The qualitative, time-resolved skin-friction topology, combined with the quantitative, time-averaged distribution of the streamwise friction velocity, enables to establish a portrait of the complex, three-dimensional, unsteady scenario occurring at the examined flow conditions, thus providing new, fundamental information for a deeper understanding of the incipient stall development and for its control.

The sense of community in online courses may contribute to the success and the satisfaction of all the students and the integration of the students with disabilities. Therefore, a valid scale to assess sense of community must be used. For this purpose, a questionnaire for the evaluation of all the dimensions of the MacMillan and Chavis (1986) sense of community model, the main theoretical reference in the field, is being developed for use with students of university online courses. The usefulness of such a questionnaire for the planning of interventions to promote the feeling of being a member of a group in online courses is discussed.

The purpose of this exploratory study is to investigate why and how public health agencies employed social media during coronavirus disease 2019 (COVID-19) outbreak to foster public engagement and dialogic accounting.

The authors analysed the official Facebook pages of the leading public agencies for health crisis in Italy, United Kingdom and New Zealand and they collected data on the number of posts, popularity, commitment and followers before and during the outbreak. The authors also performed a content analysis to identify the topics covered by the posts.

Empirical results suggest that social media has been extensively used as a public engagement tool in all three countries under analysis but – because of legitimacy threats and resource scarcity – it has also been used as a dialogic accounting tool only in New Zealand. Findings suggest that fake news developed more extensively in contexts where the public body did not foster dialogic accounting.

Public agencies may be interested in knowing the pros and cons of using social media as a public engagement and dialogic accounting tool. They may also leverage on dialogic accounting to limit fake news.

This study is one of the first to look at the nature and role of social media as an accountability tool during public health crises. In many contexts, COVID-19 forced for the first time public health agencies to heavily engage with the public and to develop new skills, so this study paves the way for numerous future research ideas.

This paper introduces the second part of a AAAJ special issue on accounting, accountability and management during the COVID-19 emergency. The authors analyse the themes that emerge from the second part of the special issue, which allows us to identify the diverse accounting and accountability practices across different geographical and organisational contexts. The authors also provide an overall picture of the contributions of the special issue, with insights into avenues of future research.

Building on the first part of the AAAJ special issue, the paper draws together and identifies additional emerging themes related to research into the COVID-19 pandemic and how it impacts accounting, accountability and management practices. The authors reflect on the contributions of the special issue to the interdisciplinary accounting research project.

The authors identify two macro-themes and outline their contributions to the accounting literature. The first deals with the changes and dangers of accounting and accountability practices during the pandemic. The second considers accountability practices in a broader sense, including reporting, disclosure and rhetorical practices in the management of COVID-19.

The paper shows the pervasive role of accounting and accountability in the unprecedented and indiscriminate health crisis of COVID-19. It highlights the important role of special issues in producing timely research that responds to unfolding events.

This paper contributes to current debates on the roles of accounting and accountability during COVID-19 by drawing together the themes of the special issue and identifying future interdisciplinary accounting research on the pandemic's aftermath.

This study aims to address three important issues of combination forecasting in the tourism context: reducing the restrictions arising from requirements related to the statistical properties of the available data, assessing the weights of single models and considering nonlinear relationships among combinations of single-model forecasts.

A three-stage multiple-attribute decision-making (MADM)-based methodological framework was proposed. Single-model forecasts were generated by grey prediction models for the first stage. Vlsekriterijumska Optimizacija I Kompromisno Resenje was adopted to develop a weighting scheme in the second stage, and the Choquet integral was used to combine forecasts nonlinearly in the third stage.

The empirical results for inbound tourism in Taiwan showed that the proposed method can significantly improve accuracy to a greater extent than other combination methods. Along with scenario forecasting, a good forecasting practice can be further provided by estimating ex-ante forecasts post-COVID-19.

The private and public sectors in economies with high tourism dependency can benefit from the proposed method by using the forecasts to help them formulate tourism strategies.

This study contributed to presenting a MADM-based framework that advances the development of a more accurate combination method for tourism forecasting.

針對旅遊需求預測, 本研究就降低對於資料統計性質的要求、模式的重要度評估, 以及各別預設值間存在的非線性關係等三項重要議題建立組合預測的研究框架。

研究方法以多屬性決策分析為基礎, 在實作上以灰色預測模式產生各別預測值、以 VIKOR 為模式發展加權方案, 再使用模糊積分以非線性方式組合預測值。

以台灣的入境旅遊需求進行分析, 並與其他組合方法相較, 發現所提出方法的預測準確度顯著較佳。與情境預測結合下, 研究結果亦可呈現新冠疫情下於各季的事前預測。

對旅遊具有高度依賴的經濟體, 所提出方法所產生的預測值有助於其公部門與私部門規劃旅遊策略。

組合預測在旅遊需求的預測上有其研究價值。本研究在旅遊預測議題提出以多屬性決策分析為基礎之框架, 在推進具高準確率組合方法的發展上作出貢獻。

La combinación de pronósticos en este estudio abordó tres cuestiones importantes para la situación del turismo: Reducir las restricciones que surgen con respecto a las estadísticas de datos disponibles, evaluar los pesos con un solo pronóstico, y considerar las relaciones no lineales entre las combinaciones con un único modelo de pronóstico.

Se propuso un marco metodológico de tres etapas basado en MADM. Un solo pronóstico fue generado mediante modelos de predicción grises para la primera etapa. Se aplicó VIKOR para desarrollar un esquema de ponderación en la segunda etapa, y la integral de Choquet se usó para combinar los pronósticos de manera no lineal en la tercera etapa.

Los resultados empíricos de la demanda turística entrante en Taiwán mostraron que el método propuesto puede mejorar efectivamente la precisión en mayor medida que otros métodos combinados. Una buena práctica del pronóstico puede proporcionar aún más, mediante las previsiones y la estimación exante de pronósticos posteriores al COVID-19.

Los sectores públicos y privados de las economías con alta dependencia del turismo pueden beneficiarse del método propuesto al usar los pronósticos para ayudarlos a formular estrategias turísticas.

Este estudio contribuye a presentar un marco basado en MADM que avanza en el desarrollo de un método de combinación más preciso para la previsión del turismo.

The aim of this paper is to shed light on recent debates in this journal on differences in home‐region orientation depending on type of company and the home region in which they are based.

The paper looks at the structure of trade (imports and exports) across different types of goods in order to shed light on differences between sectors and types of technology. The paper also explores structures across regions in order to shed light on regional differences.

This research indicates that there are major differences in structures of trade between different types of goods. However, these differences do not necessarily conform to a clear pattern across different technological levels and differ between regions and the direction of trade. The fact that Asian cultures have greater psychic distance from European and North American cultures is not reflected in higher levels of home‐region orientation.

The paper helps to clarify some of the hypotheses on home‐region orientation recently identified in this journal and, thus, helps to advance theories about why this orientation is so prevalent. The main limitations are related to the methodology. Using trade data, the paper cannot define the boundaries of the firm and, therefore, can only make conclusions at the macro level. These conclusions can, nevertheless, help to orient work at the micro level to further explore the key questions which recent work has raised.

Limited comparative work across sectors or technologies has been undertaken in the context of the debate on home‐region orientation. Differentiating between different types of goods can help to give us insights into why so many companies tend to focus so consistently on their home region, while others are more global.

Faced with the growing need to find new viable water supply models for urban areas, this article studies and maps the strategies and identifies the key criteria of sustainable development present in pioneering water supply systems in the medieval period. The main aim is to determine which of its innovative principles could be applied in present-day cities.

From a methodological perspective, two types of cases were established, such as water supply models for human consumption and pre-industrial hydraulic systems, all of which are located in Italy. For the first group, the cases of Venice and Siena were analysed, while for the second, in the context of the cities along the Aemilian Way, the case of Bologna was selected.

Five key criteria resulted from the analysis of the cases: exploitation, self-sufficiency, maintenance, rationalisation and reuse. The said concepts were defined and contextualised within the framework of the Sustainable Development Goals.

The Middle Ages were a historic moment in technological reinvention, before the development of modern systems of sanitation. With very limited resources, these traditional systems focused on rational use and deep cultural and geographical knowledge. This is why its recognition is of great importance today, in a time full of instabilities, with a view to the work that needs to be done for the development of more sustainable communities.

This study aims to provide an overview of the past two decades of lifelong learning (LLL) policies for enhancing employability and reduce social exclusion in young people of European countries through the development of the so-called LLL key-competences.

Built on a quasi-systematic review, this contribution explores traditional and new methods for promoting the LLL transition, and then employability, in young adults (e.g. apprenticeship, vocational training, e-learning, etc.).

It argues the need to identify all the possible approaches able to support policymakers, as they can differently impact key-competence development.

Finally, based on the consolidated EU policy experience, we propose a strategy of implementation of the LLL programmes that facilitates the institutions’ decision processes for policy-making through the use of decisional support system.

The Saint Valentine's Decree (1984) and the ensuing hard‐fought referendum (1985), which reduced the automatisms of scala mobile, started a process of redefinition of wage fixing in Italy, which culminated with the final abolition of scala mobile (1992) and the approval of Protocollo d'intesa (1993). Since then, following new corporatist principles, a national system of centralised wage bargaining (concertazione) and so‐called “institutional indexation” have governed the determination of wages. Does incomes policy generate greater coordination in the process of wage formation? Does it cause greater co‐movement of wages, prices, labour productivity and unemployment? This paper aims to answer these questions with reference to one of the G8 economies.

After testing for unit root each component by using the ADF, Phillips and Perron, DF‐GLS and Zivot and Andrews statistics, the paper tests for co‐integration the so‐called WPYE model using different methods. The Engle and Granger approach is used to assess the impact of incomes policy on the speed of adjustment of real wages, productivity (and unemployment) to their equilibrium value, while the Gregory and Hansen procedure serves as a means to endogenously detect the presence of a regime shift. The paper estimates coefficients before and after the structural break.

Incomes policy based on the 1993 Protocol has caused a regime shift in the process of wage determination. The long‐run estimates of the WPYE model do not generate stationary residuals except when a dummy for 1993 is added. The share of wages over GDP reduces by about ten percentage points in the early 1990s and has stood at about 57 per cent since 1995. The link with productivity is close to one‐to‐one only before the break. The feedback mechanism, as measured by the coefficient of lagged residuals in short‐run estimates, is increased from −0.46 in the pre‐reform to −0.79 in the post‐reform period, suggesting that incomes policy has increased real wage flexibility indeed. In recent years the link between real wages and (very low) labour productivity growth has weakened. In a sense, incomes policy has introduced a new form of (upward) wage rigidity. Last but not least, incomes policy has changed the correlation with the unemployment rate from positive to not statistically significant.

Future developments will focus on disentangling the impact of incomes policy vis‐à‐vis other policy interventions on WPYE and on unemployment.

The analysis calls for a careful revision of the 1993 Protocol aimed at better protecting the purchasing power of real wages without losing control on inflation, and introducing growth‐generating mechanisms.

The paper studies the impact of incomes policy on WPYE and the Phillips curve by means of co‐integration and structural break analysis. It proposes to interpret the effect of incomes policy on the Phillips curve as changing the coefficient of the error correction mechanism that leads real wages to their long‐run equilibrium value.

The purpose of this paper is to explore the determinants of successful eco-innovation processes, using R&D intensity and green patents as metrics for eco-innovation measurement and analysis.

The paper reports the results of a quantitative study based on a sample of 2,218 firms with proactive profiles in eco-innovation, 249 of which have green patents registered in Spain or in the European Union.

The results suggest positive relationships between the activity of eco-innovation of firms with both the innovation activity in firms and the R&D intensity. The findings also confirm the influence of implementing innovation in the financial performance of business.

The results will be useful for future studies on the subject and for practitioners making decisions on investments in collaborative R&D and its protection through industrial property in the form of green patents. The main determinants of eco-innovation analysed in this paper can be directly translated into practices because they provide information on how to strengthen these determinants in environmental R&D investments and the registration of green patents.

The results will be useful for future studies on the subject and for practitioners making decisions on investments in collaborative R&D and its protection through industrial property in the form of green patents. The main determinants of eco-innovation analysed in this paper can be directly translated into practices because they provide information on how to strengthen these determinants in environmental R&D investments and the registration of green patents.

Despite the popularity and potential impact of the eco-innovation on economy or society, it has fallen short in terms of its potential to improve financial performance in firms. This paper argues that the level of eco-innovation activity explains some variability in financial performance. In fact, those firms that have greater levels of innovation increase their performance.

Explorar los determinantes del éxito de los procesos de ecoinnovación, utilizando la intensidad de I + D y las patentes verdes como indicadores para la medición y el análisis de la ecoinnovación.

Se analizan y presentan los resultados de una investigación cuantitativa basada en una muestra de 2218 empresas con perfiles proactivos en ecoinnovación, de las cuales 249 tienen patentes verdes registradas en España o en la Unión Europea.

Los resultados sugieren relaciones positivas entre la actividad de ecoinnovación de las empresas con su actividad de innovación y la intensidad de la I + D. Los resultados también confirman los efectos que la implementación de innovaciones tiene sobre el desempeño financiero de las empresas.

La medición de la ecoinnovación es incluso más compleja que la medición de la innovación debido a sus aspectos ambientales intrínsecos. Se podría alcanzar una evaluación más profunda con un mayor número de variables y una muestra más grande.

Los resultados serán útiles para futuros estudios sobre el tema y para los profesionales que toman decisiones sobre inversiones en investigación y desarrollo en colaboración y su protección a través de la propiedad industrial en forma de patentes verdes. Los principales determinantes de la ecoinnovación analizados en este estudio pueden traducirse directamente a las prácticas, ya que proporcionan información sobre cómo fortalecer estos determinantes en las inversiones en I + D ambiental y el registro de patentes verdes.

A pesar de la popularidad y el impacto potencial de la ecoinnovación en la economía o la sociedad, se ha quedado corto en cuanto a su potencial para mejorar el desempeño financiero de las empresas. Este estudio sostiene que el nivel de actividad de ecoinnovación explica cierta variabilidad en el desempeño financiero. De hecho, aquellas empresas que tienen mayores niveles de innovación aumentan su desempeño.