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Article
Publication date: 1 June 1996

M. Ndour, K. Abbaoui, H. Ammar and Y. Cherruault

Describes the use of the decomposition method for solving the differential system governing the interaction between two species, based on the Lotka‐Volterra model. The Alienor…

205

Abstract

Describes the use of the decomposition method for solving the differential system governing the interaction between two species, based on the Lotka‐Volterra model. The Alienor method is applied for identifying the parameters of the model, which are the intrinsic rates of natural increase of the different species and their interaction coefficients.

Details

Kybernetes, vol. 25 no. 4
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 July 1995

H. Ammar and Y. Cherruault

Using the ALIENOR transformation avoids the problem of determining the first and second derivatives of the objective functional f when using the multidimensional bissection…

80

Abstract

Using the ALIENOR transformation avoids the problem of determining the first and second derivatives of the objective functional f when using the multidimensional bissection method. Knowledge of the Lipschitzian constant C is generally sufficient for using this method, and therefore for determining the global maximum of f defined on a compact set.

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Kybernetes, vol. 24 no. 5
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 February 1997

H. Ammar, Y. Cherruault, A. Meulemans, D. Leguludec and C. Peter

Suggests a unidimensional model for determining the analytical solution of the diffusion of antibodies in tumours. By using the Alienor technique, identifies the parameters…

173

Abstract

Suggests a unidimensional model for determining the analytical solution of the diffusion of antibodies in tumours. By using the Alienor technique, identifies the parameters characterizing this diffusion and calculates the interval between steps.

Details

Kybernetes, vol. 26 no. 1
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 8 June 2020

Mohammad A. Hassanain, Ammar H. A. Dehwah, Muizz O. Sanni-Anibire and Wahhaj Ahmed

This study aims to evaluate the quality of an on-campus medical facility at a leading university.

262

Abstract

Purpose

This study aims to evaluate the quality of an on-campus medical facility at a leading university.

Design/methodology/approach

Published literature was consulted to review knowledge areas on the usability and quality performance requirements of healthcare facilities. Quality indicators were, thus, developed from the extant literature and verified by a walkthrough of a case study medical facility. Then, a quality assessment survey was developed and administered to obtain feedback from users of the medical facility. Additionally, a focus group meeting was conducted to obtain more qualitative feedback on the issues identified through the questionnaire survey.

Findings

The results show that users were generally satisfied with the identified evaluation categories, indicating moderate quality. Potential quality issues related to the exterior and interior finishes, furniture and the indoor air were noted through focus group meetings. The study proposed a number of recommendations to enhance the design quality of the medical center.

Originality/value

The importance of this study is evident in the fact that the quality of healthcare facilities has a direct link to the performance and overall well-being of its intended users, as well as the overall success of its host organization. The study demonstrates the value of users' feedback on the quality of a built facility. It re-emphasizes the point that buildings can only be judged to be of high quality if the users' are highly satisfied.

Details

International Journal of Workplace Health Management, vol. 13 no. 6
Type: Research Article
ISSN: 1753-8351

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Article
Publication date: 1 December 2000

Hamadi Ammar and Yves Cherruault

Shows how a hi‐dimensional optimisation problem with linear inequalities constraints is converted into a global optimisation problem of one bounded variable function f*. Then, we…

225

Abstract

Shows how a hi‐dimensional optimisation problem with linear inequalities constraints is converted into a global optimisation problem of one bounded variable function f*. Then, we reduce the feasible region f* before seeking its global optimum.

Details

Kybernetes, vol. 29 no. 9/10
Type: Research Article
ISSN: 0368-492X

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Book part
Publication date: 6 September 2010

Jumana Vasi

Purpose – Islam's environmental ethic has been largely ignored by Western activists. This chapter attempts to fill this void by providing an overview of Islam's environmental…

Abstract

Purpose – Islam's environmental ethic has been largely ignored by Western activists. This chapter attempts to fill this void by providing an overview of Islam's environmental values and by exploring how this is related to behavior.

Design/methodology/approach – The study reports on data collected from a national survey of American Muslim women.

Findings – Results show that Muslim women living in the United States participate in a wide variety of outdoor recreation activities. They also engage in pro-environmental behaviors with frequencies similar to those of the general population. Yet as a group, Muslims are not taking action on environmental issues. This shows an untapped potential for mosques to build upon Islam's existing environmental ethic and develop an environmental agenda that incorporates the unique strengths of this American multi-ethnic, multiracial community.

Originality/value – This is one of the few studies to study Muslim environmentalism. It is also unique for its focus on Muslim women.

Details

Environment and Social Justice: An International Perspective
Type: Book
ISBN: 978-0-85724-183-2

Available. Content available
Article
Publication date: 8 November 2024

Marwa Ben Moallem, Ayoub Tighazoui, Remy Houssin, Mohamed Haykal Ammar, Diala Dhouib and Amadou Coulibaly

This paper treats the problem of scheduling seafaring staff inspired from a real case study, where the shipowner operates several vessel categories that require specific skills…

112

Abstract

Purpose

This paper treats the problem of scheduling seafaring staff inspired from a real case study, where the shipowner operates several vessel categories that require specific skills aiming to achieve a fair workload distribution and minimizing incompatibility between workers while meeting legal constraints, including requirements for days off and rest intervals between shifts.

Design/methodology/approach

A mixed integer linear problem (MILP) formulation has been built to address the seafaring staff scheduling problem by integrating multiple objectives and constraints. The model’s performance is tested through experimental results across varying parameter adjustments.

Findings

Our model was tested and validated using the XPRESS solver, and the results demonstrate its effectiveness in meeting the specified objectives and constraints. Notably, findings reveal that increasing the number of qualified workers leads to improved gains, until a certain threshold. Additionally, expanding the size of the workforce can result in longer execution times, specifically when incompatibility increases.

Originality/value

The originality of this study lies in proposing a generic novel model that deals with maritime staff scheduling, incorporating worker incompatibilities and workload fairness as key objectives.

Details

Maritime Business Review, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2397-3757

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Article
Publication date: 14 July 2021

Jessica Maalouf, Jennifer C. Tomazou, Stephanie Azar, Christelle Bou-Mitri, Jacqueline Doumit, Amira Youssef, Roland B. Andary, Wadih A. Skaff and Milad G. El Riachy

This study aims to identify the effect of selected agro-industrial factors associated with the olive oil phenolic composition, total phenolic content (TPC), antioxidant capacity…

129

Abstract

Purpose

This study aims to identify the effect of selected agro-industrial factors associated with the olive oil phenolic composition, total phenolic content (TPC), antioxidant capacity and oxidative stability index (OSI). The study also aims to assess the relationship between the quality indices and each of the individual phenol, TPC, antioxidant capacity and OSI.

Design/methodology/approach

Olive oil samples (n=108) were collected from Lebanese northern (Akkar and Zgharta-Koura) and southern (Hasbaya and Jezzine) regions, at three harvesting times (early, intermediate, late) and using different types of mills (traditional, sinolea, two- and three-phase decanters). The samples were analyzed using official standard methods.

Findings

The highest TPC, antioxidant capacity and OSI were obtained in early harvested olive oil, using two-phase decanters for TPC and three-phase decanters for antioxidant capacity and OSI. A prediction model, including the free acidity, K232, TPC, C18:2, C18:0, tyrosol and apigenin, was obtained; it allowed to predict very highly significantly the OSI (p < 0.001). Apigenin, tyrosol and C18:2 recorded the highest standardized coefficients (ß^+= 0.35) and thus had the highest influence on OSI. As per antioxidant capacity of olive oil, another very highly statistically significant prediction model was constructed (p < 0.001). It included only two predictors, oleacein and TPC, with the latter having the most influence (ß^+= 0.37).

Originality/value

The overall results highlighted the detrimental effects of agro-industrial factors on olive oil chemical composition, and this contributes significantly to improve olive oil’s quality and characteristics, which are important for the product economical and nutritional values.

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Article
Publication date: 1 February 2000

A. Ziadi and Y. Cherruault

The reducing transformation and global optimization technique called Alienor has been developed in the 1980s by Cherruault and Guillez. These methods are based on the…

177

Abstract

The reducing transformation and global optimization technique called Alienor has been developed in the 1980s by Cherruault and Guillez. These methods are based on the approximating properties of α ‐dense curves. The aim of this work is to give a very large class of functions generating α ‐dense curves in a hyper‐rectangle of Rn.

Details

Kybernetes, vol. 29 no. 1
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 July 1997

Yves Cherruault

Introduces new reducing transformation which allows expression of n variables in function of a single one. This allows densification of the space Rn and the quality of the…

133

Abstract

Introduces new reducing transformation which allows expression of n variables in function of a single one. This allows densification of the space Rn and the quality of the densification can be estimated. Applications to global optimization problems lead to the optimization of one variable function and the time of calculation for obtaining a global optimum can be estimated.

Details

Kybernetes, vol. 26 no. 5
Type: Research Article
ISSN: 0368-492X

Keywords

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