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Article
Publication date: 26 August 2020

Fatima Souad Bezzaoucha, M’hammed Sahnoun and Sidi Mohamed Benslimane

Improving reliability is a key factor in reducing the cost of wind energy, which is strongly influenced by the cost of maintenance operations. In this context, this paper aims to…

196

Abstract

Purpose

Improving reliability is a key factor in reducing the cost of wind energy, which is strongly influenced by the cost of maintenance operations. In this context, this paper aims to propose a degradation model that describes the phenomenon of fault propagation to apply proactive maintenance that will act on the cause of failure to prevent its reoccurrence as well as to improve future system designs.

Design/methodology/approach

The methodology adopted consists in identifying the different components of a wind turbine, their causes and failure modes, and then, classifying these components according to their causes of failure.

Findings

The result is a classification of the different components of a wind turbine according to their failure causes. From the obtained classification, the authors observed that the failure modes for one component are a failure cause for another component, which describes the phenomenon of failure propagation.

Originality/value

The different classifications existing in the literature depend on the nature, position and function of the different components. The classification of this study consists in grouping the components of a wind turbine according to their failure causes to develop a degradation model considering the propagation of failure in the field of wind turbines.

Details

International Journal of Energy Sector Management, vol. 15 no. 2
Type: Research Article
ISSN: 1750-6220

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Article
Publication date: 20 November 2009

Sidi Mohamed Benslimane, Mimoun Malki and Djelloul Bouchiha

Web applications are subject to continuous changes and rapid evolution triggered by increasing competition, especially in commercial domains such as electronic commerce…

444

Abstract

Purpose

Web applications are subject to continuous changes and rapid evolution triggered by increasing competition, especially in commercial domains such as electronic commerce. Unfortunately, usually they are implemented without producing any useful documentation for subsequent maintenance and evolution. Thereof, the maintenance of such systems becomes a challenging problem as the complexity of the web application grows. Reverse engineering has been heralded as one of the most promising technologies to support effective web application maintenance. This paper aims to present a reverse engineering approach that helps understanding existing undocumented web applications to be maintained or evolved.

Design/methodology/approach

The proposed approach provides reverse engineering rules to generate a conceptual schema from a given domain ontology by using a set of transformation rules. The reverse engineering process consists of four phases: extracting useful information; identifying a set of ontological constructs representing the concepts of interest; enriching the identified set by additional constructs; and finally deriving a conceptual schema.

Findings

The advantage of using ontology for conceptual data modeling is the reusability of domain knowledge. As a result, the conceptual data model will be made faster, easier and with fewer errors than creating it in usual way. Designers can use the extracted conceptual schema to gain a better understanding of web applications and to assist in their maintenance.

Originality/value

The strong point of this approach is that it relies on a very rich semantic reference that is domain ontology. However, it is not possible to make a straightforward transformation of all elements from a domain ontology into a conceptual data model because ontology is semantically richer than data conceptual models.

Details

International Journal of Web Information Systems, vol. 5 no. 4
Type: Research Article
ISSN: 1744-0084

Keywords

Available. Content available
Article
Publication date: 20 November 2009

Ismail Khalil

460

Abstract

Details

International Journal of Web Information Systems, vol. 5 no. 4
Type: Research Article
ISSN: 1744-0084

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Book part
Publication date: 11 August 2014

Lara Lengel and Victoria Ann Newsom

To examine how social media restrict and recreate messages within current interactionist scripts in the Middle East and North Africa (MENA), this study applies a framework of…

Abstract

To examine how social media restrict and recreate messages within current interactionist scripts in the Middle East and North Africa (MENA), this study applies a framework of digital reflexivity highlighting stages of information flow. It applies the symbolic interaction concept of emotional events to analyze the self-immolation of Mohamed Bouazizi and the role of social media in disseminating Bouazizi’s act as one catalyst of the MENA citizen uprisings. The role of social media in the “Arab Spring” merits investigation because social media provide opportunities to examine shifting identities, interactions, and actions of citizen activists in the MENA uprisings. This study is important and timely because little symbolic interactionist scholarship exists on MENA identities and social movements, or on crowd interaction and activism outside the West. The nuanced nature of MENA political activism and complex processes of the development of activists’ “mutable” selves (Zurcher, 1977) are fluid and resistant to symbolically defined social roles, interactionist scripts and reflexivity, and public communication practices in a MENA under political and social transition.

Details

Symbolic Interaction and New Social Media
Type: Book
ISBN: 978-1-78350-933-1

Keywords

Available. Open Access. Open Access
Article
Publication date: 18 August 2021

Omar Benslimane, Ahmed Aberqi and Jaouad Bennouna

In the present paper, the authors will discuss the solvability of a class of nonlinear anisotropic elliptic problems (P), with the presence of a lower-order term and a…

805

Abstract

Purpose

In the present paper, the authors will discuss the solvability of a class of nonlinear anisotropic elliptic problems (P), with the presence of a lower-order term and a non-polynomial growth which does not satisfy any sign condition which is described by an N-uplet of N-functions satisfying the Δ2-condition, within the fulfilling of anisotropic Sobolev-Orlicz space. In addition, the resulting analysis requires the development of some new aspects of the theory in this field. The source term is merely integrable.

Design/methodology/approach

An approximation procedure and some priori estimates are used to solve the problem.

Findings

The authors prove the existence of entropy solutions to unilateral problem in the framework of anisotropic Sobolev-Orlicz space with bounded domain. The resulting analysis requires the development of some new aspects of the theory in this field.

Originality/value

To the best of the authors’ knowledge, this is the first paper that investigates the existence of entropy solutions to unilateral problem in the framework of anisotropic Sobolev-Orlicz space with bounded domain.

Details

Arab Journal of Mathematical Sciences, vol. 29 no. 1
Type: Research Article
ISSN: 1319-5166

Keywords

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Article
Publication date: 28 January 2025

Malika Elouali, Nadia Elouali, Aya Elouali and Fatima Zohra Elouali

This study aims to investigate the ethical considerations and effectiveness of persuasive technology in educational settings, specifically focusing on course selection.

3

Abstract

Purpose

This study aims to investigate the ethical considerations and effectiveness of persuasive technology in educational settings, specifically focusing on course selection.

Design/methodology/approach

In this paper, the authors explore the use and ethics of persuasion in the context of education, specifically regarding course selection in higher education settings. The authors conducted a survey involving students to assess their ethical perceptions of persuasive user interfaces and the impact of these interfaces on their decision-making processes. Participants were presented with different user interface designs that used various combinations of text and images to persuade them in their class selections within an institution based in Algeria.

Findings

The results reveal that students were only persuaded when they were unable to select what they wanted, and they did not even perceive themselves as being persuaded. Most participants found the persuasion for their own benefit and neutral (with no intention behind) to be ethically admirable. However, for the university’s benefit, most participants found the persuasion to be ethically neutral. In addition, in general they had neither a positive nor negative reaction to the attempt of persuading them.

Research limitations/implications

These findings suggest that, to influence student attitudes effectively, even when they retain freedom of choice, robust persuasive techniques may be necessary. At the same time, careful attention to ethical considerations is essential to maintain students’ positive perceptions.

Originality/value

The novelty of the study is addressing the use and ethics of persuasion through human–machine interfaces within a higher education setting, specifically among students in an Algerian educational institution. The main contribution is determining whether students can be persuaded with different interface designs (neutral design, persuasive design with a morally admirable goal, persuasive design with a neutral goal and persuasive design with a morally questionable goal), as well as whether they consider persuasion to be ethical.

Details

Journal of Information, Communication and Ethics in Society, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1477-996X

Keywords

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