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Article
Publication date: 7 August 2020

Massimo Miozzi, Alessandro Capone, Christian Klein and Marco Costantini

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…

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Abstract

Purpose

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.

Design/methodology/approach

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.

Findings

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°.

Originality/value

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.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 2
Type: Research Article
ISSN: 0961-5539

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Article
Publication date: 24 April 2020

Vito Getuli, Pietro Capone and Alessandro Bruttini

Building construction is considered a complex, dynamic and highly hazardous process, which embraces many factors that are potentially dangerous to workers. Many studies proved…

1583

Abstract

Purpose

Building construction is considered a complex, dynamic and highly hazardous process, which embraces many factors that are potentially dangerous to workers. Many studies proved that the improvement of preventive and proactive measures – dynamically included in the building design, planning and construction – could reduce site accidents as well as increase the site productivity. In this context, process management models and information visualization techniques such as building information modeling (BIM) and virtual reality (VR) seem to be devoted to strongly contribute to the advancement of the current safety management practices. For these reasons, the presented contribution is based on the assumption that a more nuanced approach for construction worker's safety training is warranted and the authors propose a safety training protocol based on BIM-enabled VR activity simulations.

Design/methodology/approach

The methodology comprised a safety training protocol based on BIM-enabled VR activity simulations. The protocol addresses three methodological issues: (1) Planning in terms of training typologies and related health and safety contents to be implemented in the VR construction site scenarios; (2) Management regarding the solution to integrate BIM and game technologies to deliver VR training experiences; (3) Administration in terms of definition of standardized rules to define a safety training schedule in a given construction project.

Findings

This work contributes to provide a standardized protocol for a viable integration of BIM and VR technologies for construction safety training in real projects.

Practical implications

The VR training protocol was applied to a construction project based in Italy that served as case study for the development of the training sessions' contents and their implementation. This case demonstrated the feasibility of the protocol's implementation and pointed out the drawbacks and limitations on which further efforts need to be spent in order to take the proposed protocol from a prototypical stage to a maturity for its larger-scale adoption from the practitioners involved in construction safety training.

Originality/value

The research gives a contribution to reduce the currently existing knowledge gap regarding how BIM and VR can be simultaneously integrated in real projects for construction safety training by using standardized rules to be extensively reproduced in different construction projects. It uses a customized toolkit with a mobile smartphone solution to administer Safety Training Scenarios which increases its portability in construction site compared to PC-based VR solutions.

Details

Engineering, Construction and Architectural Management, vol. 28 no. 2
Type: Research Article
ISSN: 0969-9988

Keywords

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Article
Publication date: 13 September 2021

Vito Getuli, Pietro Capone, Alessandro Bruttini and Tommaso Sorbi

Health and safety training via immersive virtual reality (VR) in the construction sector is still limited to few early adopters despite the benefits it could provide in terms of…

902

Abstract

Purpose

Health and safety training via immersive virtual reality (VR) in the construction sector is still limited to few early adopters despite the benefits it could provide in terms of training effectiveness. To foster its adoption, in this work, the authors address the lack of an organized asset of digital contents dedicated to the production of VR site scenarios that emerged as one of the most limiting factors for the implementation of building information modeling (BIM) and VR for construction workers’ safety training. To improve this critically time-consuming process, a dedicated site object library is proposed.

Design/methodology/approach

The development of the site object library for the production of BIM-based VR safety training experiences followed a four-step process: definition of the object list and categories from the analysis of heterogeneous knowledge sources – construction sectors’ regulations, case studies and site scenarios’ imagery; definition of the object requirements (e.g. information, graphics, sounds, animations and more); design of an object information sheet as a library implementation support tool; and library implementation and validation via collaborative VR sessions.

Findings

This work provides the definition of a structured library of construction site objects dedicated to the production of VR scenarios for safety training comprising 168 items, implemented and validated.

Originality/value

The research contributes to facilitate and standardize the time-consuming contents’ production and modeling process of site scenarios for VR safety training, addressing the lack of a dedicated site object library. Furthermore, the novel library framework could serve as a base for future extensions dedicated to other applications of VR site simulations (e.g. constructability analysis).

Details

Construction Innovation , vol. 22 no. 3
Type: Research Article
ISSN: 1471-4175

Keywords

Available. Open Access. Open Access
Article
Publication date: 28 May 2020

Alessandro Pagano, Elisa Carloni, Serena Galvani and Roberta Bocconcelli

This paper aims to provide a contribution on the diffusion of Industry 4 (I4.0)-related knowledge in industrial districts (IDs). The main goal is to examine the dissemination of…

2403

Abstract

Purpose

This paper aims to provide a contribution on the diffusion of Industry 4 (I4.0)-related knowledge in industrial districts (IDs). The main goal is to examine the dissemination of I4.0 knowledge, exploring the main mechanisms for its spreading and highlighting the main factors shaping such processes. Focus is on dissemination processes in IDs active in traditional industries, which could represent the “periphery” of I4.0 application context.

Design/methodology/approach

The methodology is qualitative. Notably, this paper presents a case study of the Pesaro ID specialized in furniture/woodworking machinery sector. A total of 18 in-depth one-to-one interviews have been conducted with relevant informants from a variety of organizations within the cluster: companies, institutions and universities.

Findings

The complexity of I4.0 requires a combination of traditional mechanisms with innovative ones within IDs characterized by the emergence of new players, activities and resources. These changes led to three main evolving patterns: the horizon of I4.0 upgrading shows blurred boundaries in terms of sectors and geographic location, the I4.0 diffusion appears fragmented in terms of initiatives and projects by both firms and institutions and the dissemination of I4.0 knowledge pushes ID firms and institutions to pursue deliberate initiatives leading to innovative forms of “collective” cooperation.

Originality/value

This paper contributes to both theory and practice. From the theoretical point of view, this paper contributes to the literature on innovation in IDs and clusters on two interrelated grounds. First, it provides further research on I4.0 and IDs and clusters. Second, it contributes to the stream of research on knowledge creation and diffusion in IDs and clusters, providing empirically based insights over emerging local learning processes in IDs. Moreover, relevant managerial and policy implications stem from the analysis.

Details

Competitiveness Review: An International Business Journal , vol. 31 no. 1
Type: Research Article
ISSN: 1059-5422

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Article
Publication date: 14 March 2023

Jennifer Karnopp and Jeff Walls

Existing conceptualizations of organizational learning focus on processes and structures while also acknowledging a social element, usually framed as bringing people together…

248

Abstract

Purpose

Existing conceptualizations of organizational learning focus on processes and structures while also acknowledging a social element, usually framed as bringing people together through formal structures. While much scholarship notes that school culture mediates organizational learning, culture is often relegated to the realm of context. Affective and relational components of organizational learning remain undertheorized. The authors argue that attending more closely to the relational component of organizational learning will offer new insights into the enactment of organizational learning in schools.

Design/methodology/approach

The study briefly discusses schools of thought regarding organizational learning. It also summarizes extant conceptualizations of school climate and culture, laying these alongside the sense of community (SOC) framework (McMillan and Chavis, 1986). Utilizing prior research, it illustrates the value of bringing this framework into conversation with theories of organizational learning in schools to enrich understandings of the conditions under which organizational learning occurs.

Findings

The authors suggest a conceptualization of relationality in organizational learning rooted in SOC, a conceptualization that is both broader than merely transactional interactions and more precise than that offered by extant notions of school culture and climate.

Originality/value

The relational perspective captured by SOC offers researchers new avenues to more fulsomely explore the ways that trust, belonging, caring and shared values facilitate organizational learning. A more thorough understanding of the role of relationality in organizational learning may provide answers to salient questions, including why some teachers go above and beyond to seek out opportunities and why some changes stay bounded within departments and substructures.

Details

Journal of Educational Administration, vol. 61 no. 3
Type: Research Article
ISSN: 0957-8234

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Article
Publication date: 13 November 2017

Belay Haile, Kumera Neme and Tefera Belachew

The Mediterranean Diet (MD) is an expression of different Mediterranean food cultures and lifestyles. It is characterized by high consumption of olive oil, vegetables, legumes…

1095

Abstract

Purpose

The Mediterranean Diet (MD) is an expression of different Mediterranean food cultures and lifestyles. It is characterized by high consumption of olive oil, vegetables, legumes, whole grain products, fruits and nuts. This paper aims to emphasize on the evolution of human diet from earliest human ancestors to current civilization, the effect of MD on human health and the role of globalization to shift traditional diet, particularly MD to processed foods.

Design/methodology/approach

Different published papers were collected from the internet by using the following phrases: evolution of human diet, human ancestors, the effect of globalization on a regional diet, Mediterranean diet, healthy food, food pyramid, evolution of human diet and effect of globalization on diet. Finally, the papers were read and summarized as a review paper.

Findings

MD has been accepted worldwide owing to its health impact such as prevention and control of type 2 diabetes, anti-inflammatory effects and decrease in the risk of cardiovascular diseases and incidence of Parkinson’s disease and Alzheimer’s disease. However, in conjunction with this discordance between our ancient, genetically determined biology and the nutritional, cultural and activity patterns of contemporary Western populations, many of the so-called diseases of civilization have emerged. Particularly, the food staples and food-processing procedures introduced during the Neolithic and Industrial periods have fundamentally altered nutritional characteristics of ancestral hominin diets. MD is currently under the risk of extinction for a result of the effects of globalization.

Originality/value

The review paper focuses on the evolution of human diet as an effect of globalization on the regional diet with emphasis on the MD. It specifically focuses on the link between diet and earliest human ancestors, about MD and its health benefit, diet pyramid and effect of globalization on regional diet.

Details

Nutrition & Food Science, vol. 47 no. 6
Type: Research Article
ISSN: 0034-6659

Keywords

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