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Article
Publication date: 15 March 2013

Adel Alti, Abbdellah Boukerram and Philippe Roose

The purpose of this paper was to design ontology for describing semantic context‐aware quality services, and to present a new web management tool that provides a great flexibility…

Abstract

Purpose

The purpose of this paper was to design ontology for describing semantic context‐aware quality services, and to present a new web management tool that provides a great flexibility and enables automatic semantic adaptation and customization of mobile client services.

Design/methodology/approach

The tool is developed using ontology‐based approach. This ontology captures a shared conceptual schema common in the tourism domain and maintains semantic quality information in heterogeneous service providers for service model. The results of the tool will be compared to prior works from other quality and distributed based service selection methods for mobile‐based application.

Findings

The tool support is based in the ontology Context‐aware Quality Semantic Web Service called (CxQWS). At the first step, services are defined as a set of semantic metadata, reflecting service requirements and QoS parameters. At the second step, services with a semantic contextual metadata are elaborated. Such a procedure ensures that the selection decisions should be based on the semantic quality representation of the created services. The SELETOR tool results suggest that the level of intelligent method use continue to be high flexibility in World Tourism organisations.

Research limitations/implications

The tourism services in a mobile environment have a critical role in creating tourist satisfaction. They are neither a uniform group, nor able to give consistently high service quality. Indeed they have significantly different platforms and a variety of heterogeneous service providers which make the management of service qualities complex.

Practical implications

A significant proposition is to integrate new tourism quality attributes of mobile‐based application, to provide a dynamic adaptation of selection services based on context metadata parameters (user, environment, device, and service provider context) and the management of the heterogeneity of service needs, of mobile devices capacities and their various communication protocols (GPRS, WIFI, Bluetooth, etc.) as well as the media variety (sound, video, text and image), possibly reflecting the decreased time responses and the increased visibility of standard services management methods.

Originality/value

The paper proposes SELECTOR, a dynamic service selection tool based on CxQWS ontology, defined as set of semantic metadata, which context and QoS parameters. The tool is based on semantic services and offer architecture, with three layers (semantic query, management and web services). The most innovative characteristic of the tool is that it profits from the potential of semantic representation techniques to express high level explicit constraints, while they may be useful to guide the selection and adaptation process. This tool provides low adaptation effort, e.g. takes into account all the heterogeneous services as its various communication protocols (GSM, 3G, Bluetooth, etc.) as consequences of self‐selection for dynamic context evolution guided by the adaptation policies.

Details

Journal of Systems and Information Technology, vol. 15 no. 1
Type: Research Article
ISSN: 1328-7265

Keywords

Open Access
Article
Publication date: 10 March 2020

Lamia Mabrouk and Adel Boubaker

The purpose of this study is to explore at what stage of a company’s life cycle the theory of market timing has explained debt. Drawing on a unified conceptual framework of market…

2012

Abstract

Purpose

The purpose of this study is to explore at what stage of a company’s life cycle the theory of market timing has explained debt. Drawing on a unified conceptual framework of market timing theory, the authors scrutinize the impact of life cycle and ownership structure on the market condition.

Design/methodology/approach

Based on a sample of 24 Tunisian companies listed on the stock exchange and 100 French firms listed on the CAC All-Tradable on a 10-year period, this paper grounded the market timing theory and attempted to clear the relation between ownership structure, life cycle of the firm and market timing theory by statistical analysis.

Findings

The findings of panel data modeling indicate that when the life cycle was used as an explanatory variable, it was found that the variable reflecting the market timing is not significant in either context; it means that no significant support is found in the theory of market timing in both countries. Whereas when the life cycle was used as a dummy variable, it was found that the life cycle has an impact on debt only in the Tunisian context.

Practical implications

This study has several important implications for researchers and practitioners. The findings reported here clarify the strength of the impact of life cycle on the market timing, when it explains the debt in the two contexts and the impact of ownership structure such as the managerial ownership and concentration of capital on debt.

Originality/value

This study contributes to examine the theory of debt in different phases of life cycle. Focused on the case of Tunisian and French firms, this study is unique and valuable.

Details

Asia Pacific Journal of Innovation and Entrepreneurship, vol. 14 no. 1
Type: Research Article
ISSN: 2071-1395

Keywords

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