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Article
Publication date: 5 September 2016

Andrea Andrisani, Diego Angeli and Antonio Dumas

The purpose of this paper is to define an optimal pitching profile for the blades of a cycloidal rotor which minimizes the mean power consumption for a given mean thrust of the…

189

Abstract

Purpose

The purpose of this paper is to define an optimal pitching profile for the blades of a cycloidal rotor which minimizes the mean power consumption for a given mean thrust of the rotor.

Design/methodology/approach

A simple analytical model of the kinematics and aerodynamics of a cycloidal rotor is defined first to obtain expressions for thrust and power depending on the pitching profile and geometrical parameters of the rotor. Then, Lagrange optimization is applied to obtain the optimal pitching schedule under hovering conditions. Finally, results of the theoretical analysis are compared with those of a two-dimensional computational fluid dynamics (CFD) model.

Findings

Results of the optimization suggest that the optimal profile is a combination of sinusoidal functions. It is shown that the adoption of the optimal pitching schedule could improve the power efficiency of the rotor by approximately 25 per cent.

Practical implications

The possibility to increase the efficiency of a cycloidal rotor by acting on its pitching schedule could be a significant factor of success for this alternative propulsion concept.

Originality/value

The present work represents the first attempt at a definition of an optimal pitching profile for a cycloidal rotor. Moreover, although being carried out on the basis of simplified analytical considerations, the present investigation sets a methodological framework which could be successfully applied to the design of similar kinds of systems.

Details

Aircraft Engineering and Aerospace Technology, vol. 88 no. 5
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 1 March 1956

Professore Angelo Mariotti

Se Heine non giunse fino a Roma, in compenso vi arrivarono altri non meno illustri tedeschi, il cui genio si immortalò nel campo musicale. Per non parlare di Händel, che visit�…

31

Abstract

Se Heine non giunse fino a Roma, in compenso vi arrivarono altri non meno illustri tedeschi, il cui genio si immortalò nel campo musicale. Per non parlare di Händel, che visitò Roma nel 1707, nè di Gluck, che vi venne nel 1756, ricorderemoper il'700 — Wolfango Amedeo Mozart e — per 1'800 — Riccardo Wagner.

Details

The Tourist Review, vol. 11 no. 3
Type: Research Article
ISSN: 0251-3102

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Book part
Publication date: 30 November 2020

Charles Thorpe and Brynna Jacobson

Drawing upon Alfred Sohn-Rethel's work, we argue that, just as capitalism produces abstract labor, it coproduces both abstract mind and abstract life. Abstract mind is the split…

Abstract

Drawing upon Alfred Sohn-Rethel's work, we argue that, just as capitalism produces abstract labor, it coproduces both abstract mind and abstract life. Abstract mind is the split between mind and nature and between subject/observer and observed object that characterizes scientific epistemology. Abstract mind reflects an abstracted objectified world of nature as a means to be exploited. Biological life is rendered as abstract life by capitalist exploitation and by the reification and technologization of organisms by contemporary technoscience. What Alberto Toscano has called “the culture of abstraction” imposes market rationality onto nature and the living world, disrupting biotic communities and transforming organisms into what Finn Bowring calls “functional bio-machines.”

Details

The Capitalist Commodification of Animals
Type: Book
ISBN: 978-1-83982-681-8

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Article
Publication date: 9 October 2019

Simone Sehnem, Diego Vazquez-Brust, Susana Carla Farias Pereira and Lucila M.S. Campos

This paper aims to investigate overlaps, complementarities and divergences between the literature on circular economy (CE) models and related literature in non-linear production…

7042

Abstract

Purpose

This paper aims to investigate overlaps, complementarities and divergences between the literature on circular economy (CE) models and related literature in non-linear production models and frameworks, including CE, reverse logistics, closed-loop, industrial symbiosis and industrial ecology.

Design/methodology/approach

A systematic literature review was conducted focussing on the benefits of non-linear modes adoption.

Findings

The results show a high degree of convergence in findings, gaps and weaknesses of these literatures. Negative environmental, economic and operational impacts are understudied. There is a scarcity of studies identifying practices resulting in empirically tested benefits. The business and society case for non-linear production is still largely built upon conceptual studies, modelling and a few case studies. Despite a normative focus, there is very little use of theory, in particular, management theories.

Research limitations/implications

First, the authors use only one, albeit highly recognized database, Scopus. This database may have omitted some relevant research, journals such as the Journal of Cleaner Production and Resources Conservation & Recycling that are more likely to publish such research and also have a more interdisciplinary approach. This is an important gap and interesting result to claim for more interdisciplinary research. Second, the filtering process used and the focus on Association of Business Schools top journals may have also omitted some relevant research, such as a large stream of literature in specialist journals such as Resources Conservation and Recycling and the Journal of Cleaner Production.

Practical implications

There are contradictions, tensions and epistemological ambiguity that needs to be critically addressed. Such tensions may be associated with the knowledge field that gave rise to these different non-linear production approaches. Many of them appeared at the same time, but from different sciences and disciplines with their own perspectives. Then in doing so, they create confusion in the definitions of CE, assumptions underlying modelling and business choices arising from this complexity. This can be minimized through the critical interpretation of knowledge to elucidate epistemological quandaries to improve the understanding of the economic, social and environmental impacts of practices.

Social implications

In some way, this result makes sense, as the authors have limited the search to management, business and accounts journals, especially talking about Operations Management journals. This is an important gap and interesting result to claim for more interdisciplinary research.

Originality/value

In addition to gaps previously described, the authors identified areas of tensions where the literature offers inconclusive – often contradictory – findings requiring further exploration. A better understanding of these tensions is required to understand the impacts of non-linear production and develop policy guidelines for industry and policymakers to scale-up CE.

Details

Supply Chain Management: An International Journal, vol. 24 no. 6
Type: Research Article
ISSN: 1359-8546

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Article
Publication date: 2 October 2018

Mujtaba Ahsan, Erlinde F.I. Cornelis and Andrew Baker

Crowdfunding has become a popular method to acquire capital for entrepreneurial ventures. To successfully achieve funding goals, it is critical for crowdfunding campaigns to…

778

Abstract

Purpose

Crowdfunding has become a popular method to acquire capital for entrepreneurial ventures. To successfully achieve funding goals, it is critical for crowdfunding campaigns to attain support of individuals (backers). This paper aims to presents a conceptual model that links a reward-based crowdfunding campaign’s product, pitch and promoter characteristics to expert and casual backers’ evaluation and behavior.

Design/methodology/approach

This paper draws from literature from consumer behavior, network, signaling and informational social influence theories to design a conceptual framework that highlights factors that influence potential backers’ participation in crowdfunding campaigns.

Findings

It is demonstrated that the conceptual framework presented in the manuscript usefully organizes the real-world tactical marketing decisions of a crowdfunding backer while also being readily amendable to integrating theoretical accounts of human behavior from a diverse body of social science literature. Empirically testable propositions are derived from this social science literature and recast into a manner that could be investigated in the crowdfunding context to expand the body of knowledge on this topic.

Practical implications

This manuscript provides a framework that can be useful to crowdfunders who wish to strategically plan how their marketing communication plan features may be tailored to attract both early- and late-stage crowdfunding backers.

Originality/value

This paper is novel in the crowdfunding literature because it integrates a diverse body of literature to explicitly identify how the strategic and tactical marketing communication characteristics of a crowdfunding campaign are likely to differently influence different types of potential crowdfunding backers.

Details

Journal of Research in Marketing and Entrepreneurship, vol. 20 no. 2
Type: Research Article
ISSN: 1471-5201

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Article
Publication date: 1 April 1986

Kitty Calavita

The “economic miracle” in postwar Italy was accompanied by a rapid increase in the industrial accident and illness rates. Italian workers demanded occupational safety and health…

141

Abstract

The “economic miracle” in postwar Italy was accompanied by a rapid increase in the industrial accident and illness rates. Italian workers demanded occupational safety and health enforcement mechanisms that would be more accessible to grass‐roots workers' groups and unions. In the early 1970s local “Occupational Medicine Services” were voluntarily established in many regions. The entire health care system was decentralised in 1978, giving regions exclusive authority to implement occupational safety and health standards within Local Health Units (USLs). The concrete results of these reforms are investigated and the validity of the assumptions of the calls for decentralisation. The difficulties encountered by leftist‐administered regions in attempting to translate their political commitments into significant health and safety improvements are documented. The track‐record of the USLs is examined. An ironic consequence of decentralisation has been that the concentration of all health care activities in the USL has swallowed up occupational safety and health. As a result it is less politically visible and less responsive to worker input.

Details

International Journal of Sociology and Social Policy, vol. 6 no. 4
Type: Research Article
ISSN: 0144-333X

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Book part
Publication date: 28 September 2023

Ieva Auzina, Tatjana Volkova, Diego Norena-Chavez, Marta Kadłubek and Eleftherios Thalassinos

There is a research gap in the explanation of cyber incident response approaches in management to increase cyber maturity for small–medium-size enterprises (SMEs). Therefore…

Abstract

There is a research gap in the explanation of cyber incident response approaches in management to increase cyber maturity for small–medium-size enterprises (SMEs). Therefore, based on the literature analysis, the chapter aims to (1) provide cyber incident response characteristics, (2) show the importance for SMEs, (3) identify cyber incident response feasibility and causal factors, (4) provide scenarios for consideration to create an incident response plan (IRP), and (5) discuss the cyber incident response and managerial approaches in SMEs. The authors used content analysis of scientific and professional articles to develop the theoretical foundation of incident response approaches in management for SMEs. The authors start from the fundamentals to obtain knowledge and understanding of the latest threats and opportunities, and how to defend themselves using the limited capacity of resources might be the starting point to building an extensive incident response capability. Incident response capabilities and maturity levels vary widely between various organisations. There is no simple one-size-fits-all process for incident response; each case is unique and requires continuous refinement. Differentiation and adaptation to different types of SMEs are pivotal to developing cyber maturity and defining requirements that fit the market’s needs and are therefore more efficient in achieving the goal of increasing cyber security (CS) among business management. SMEs may not have a mature IRP, but at least one readiness indicator could lead to the preparation of a mature IRP. Implementation of the secure undertakings and information processes requires using modern information and communication technologies, incident response processes, and other modules that could enhance support for decision-making processes in management. The approach requires a systematic approach to issues related to constructing these solutions. The authors highlight that building efficient incident response approaches in management to improve cyber maturity will begin with infrastructure and people factors.

Details

Digital Transformation, Strategic Resilience, Cyber Security and Risk Management
Type: Book
ISBN: 978-1-80455-254-4

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Article
Publication date: 4 September 2017

Guilherme Tortorella, Diego Fettermann, Michel Anzanello and Rapinder Sawhney

The purpose of this paper is to empirically examine the relationship between the behavioral orientation of leaders from different hierarchical levels and the implementation phase…

1563

Abstract

Purpose

The purpose of this paper is to empirically examine the relationship between the behavioral orientation of leaders from different hierarchical levels and the implementation phase of the lean manufacturing (LM) roadmap. In addition, it also aims at analyzing the influence of inherent contextual variables related to leadership.

Design/methodology/approach

The proposed method relies on both qualitative and quantitative approaches, since it combines and numerically assesses the results of semi-structured interviews with lean experts, in addition to evaluating a cross-sectional survey with 225 leaders from different Brazilian companies that are undergoing LM implementation.

Findings

The findings support the existence of a transient leadership style along the LM implementation, which is evidenced in terms of task and relation orientation and may vary according to the hierarchical level. Furthermore, the context does matter with regard to leadership style orientation along the LM roadmap phases, although not all variables matter to the same extent.

Originality/value

LM implementation is about changing both technical and socio-cultural aspects, which can be seen as the essence of leadership. The relevant question that arises is whether leaders’ behaviors from different hierarchical levels should be adapted according to the maturity of LM implementation and the contextual variables that surround leadership.

Details

Journal of Manufacturing Technology Management, vol. 28 no. 7
Type: Research Article
ISSN: 1741-038X

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Article
Publication date: 28 March 2018

Guilherme Luz Tortorella, Diego de Castro Fettermann, Alejandro Frank and Giuliano Marodin

The purpose of this paper is to understand how the association between leadership styles (task or relation orientation) and lean manufacturing (LM) implementation changes due to…

4232

Abstract

Purpose

The purpose of this paper is to understand how the association between leadership styles (task or relation orientation) and lean manufacturing (LM) implementation changes due to two contextual variables, team size and the leader’s age.

Design/methodology/approach

The authors carried out a survey with 225 leaders from different Brazilian companies that are implementing LM. Research constructs were validated through rigorous procedures using confirmatory factor analysis. Hypotheses were tested using ordinary linear least squares regression.

Findings

The results suggest that larger teams and more senior managers were negatively associated with LM implementation. Task-orientation style makes leaders more likely to achieve higher levels of LM than relation-orientation style leaders. Finally, the influence of relation-oriented leaders on LM implementation is contingent upon the size of the team.

Research limitations/implications

Regarding study’s limitations, sample size and respondents’ location restrict results to this contextual condition, indicating that increasing the sample would help provide wider and more generalizable results. It is also worth noting that results are based on respondents’ (leaders) perspective. Hence, future studies may collect data from multiple perspectives, such as leaders and their followers, in order to compare results so as to verify the convergence or divergence among different respondents.

Practical implications

The results suggest that leaders should have different behaviors according to the context in which they are inserted. Therefore, such behavioral prescriptions are useful for managers since they are pressured to achieve high operational performance in short time periods and with few resources. Further, companies undergoing lean implementation may also be able to stimulate proper leadership behaviors and promote development programs accordingly, which is extremely relevant since behavioral changes usually take time.

Originality/value

The evolutionary process for achieving a successful lean enterprise requires different leadership styles according to the context in which leaders are inserted. This research provides arguments to help better understand the recommended leadership behaviors for lean implementation, complementing existing roadmaps by considering the proper leadership style as a contingency issue during lean implementation. Moreover, identifying the effect of contextual variables helps specify the contexts in which lean practices are more likely to be implemented.

Details

International Journal of Operations & Production Management, vol. 38 no. 5
Type: Research Article
ISSN: 0144-3577

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Article
Publication date: 19 October 2018

Nathália de Souza Lara, Maísa Mancini Matioli de Sousa, Fernanda Paola de Pádua Gandra, Michel Cardoso de Angelis-Pereira, João de Deus Souza Carneiro and Rosemary Gualberto Fonseca Alvarenga Pereira

The purpose of this paper is to develop a cereal bar supplemented with coffee beverage that has health benefits.

543

Abstract

Purpose

The purpose of this paper is to develop a cereal bar supplemented with coffee beverage that has health benefits.

Design/methodology/approach

Six types of cereal bars containing raisins or prunes with different concentrations of coffee were developed. Acceptability tests and physicochemical characterizations were performed by analysis of moisture, ash, protein, lipids, fibres and carbohydrates. Moreover, the levels of phenolic compounds, the fatty acid profile and the in vitro antioxidant activity were evaluated by the DPPH free radical scavenging and iron-chelating activity methods. The bars were assessed using the check-all-that-apply (CATA) methodology. The phenolic compound and antioxidant activity data were evaluated by analysis of variance. Averages were compared by the Scott–Knott test. To verify the characteristics of the food bar per the attributes cited in CATA, main component analysis was performed using the SensoMaker software.

Findings

The concentration of coffee did not affect the centesimal composition values. The highest percentage of scavenging activity of free radicals was observed in the food bar containing raisins, with a maximum concentration of coffee beverage equivalent to 10 mL. These values were higher in cereal bars containing raisins than in bars containing prunes with the same concentrations of coffee. The acceptance sensory test showed good acceptability ratios, ranging from 74.33 to 85.22 among different food bar formulations.

Practical implications

The bar consisting raisins and 100 per cent coffee presented high values of protection against oxidative stress, phenolic content and satisfying acceptability, thereby making it a novel possible alternative as a differentiated product with possible health-beneficial effects.

Social implications

This paper provides a differentiated product, through healthy ingredients, with convenience of purchase, besides having added value and possible health beneficial effects.

Originality/value

The bar consisting of raisins and 100 per cent coffee presented high values of phenolic content and protection against oxidative stress, as well as satisfying acceptability, thereby making it a novel possible alternative as a differentiated product with possible health-beneficial effects.

Details

British Food Journal, vol. 121 no. 2
Type: Research Article
ISSN: 0007-070X

Keywords

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