Adel Alti

Dynamic semantic-based adaptation of multimedia documents

One of the key aspects of any mobile multimedia application is the management of multimedia documents. Currently, multimedia documents can be displayed on multiple platforms laptops, smartphones, tablets, etc. that result in a birth of new information system called pervasive. The various execution contexts of a multimedia presentation introduce different constraints for the presentation itself. This includes device constraints and user preferences, resulting to the overall system heterogeneity increase. In this paper, we propose a specific ontology for on-the-fly at runtime adaptation of multimedia documents. Thus, we propose rules allowing automatic generation of dynamic and quality assembly of heterogeneous components. The proposed ontology has the great advantage to offer a flexible infrastructure to users to easily govern the response time and the quality assembly of their own applications at runtime. Copyright

Autonomic Semantic-Based Context-Aware Platform for Mobile Applications in Pervasive Environments

Currently, the field of smart-* (home, city, health, tourism, etc.) is naturally heterogeneous and multimedia oriented. In such a domain, there is an increasing usage of heterogeneous mobile devices, as well as captors transmitting data (IoT). They are highly connected and can be used for many different services, such as to monitor, to analyze and to display information to users. In this context, data management and adaptation in real time are becoming a challenging task. More precisely, at one time, it is necessary to handle in a dynamic, intelligent and transparent framework various data provided by multiple devices with several modalities. This paper presents a Kali-Smart platform, which is an autonomic semantic-based context-aware platform. It is based on semantic web technologies and a middleware providing autonomy and reasoning facilities. Moreover, Kali-Smart is generic and, as a consequence, offers to users a flexible infrastructure where they can easily control various interaction modalities of their own situations. An experimental study has been made to evaluate the performance and feasibility of the proposed platform.

USSAP: Universal Smart Social Adaptation Platform

Abstract This paper presents an approach to enhance users experience through the use of recommendations and social networks for on-the-fly (at runtime) adaptation of multimedia documents. The originality of the dedicated social and context-aware of quality service composition paths is that relies on contextual information collection with history-based service cloud selection and social media analysis technics, for providing the right service to the right user on the right time and on the right place and to deploy customizable services inside one application. We show that our approach successfully and efficiently captures online social experiences in order to improve assembly of potential adaptation services and the effectiveness of our approach

COSABuilder AND COSAInstantiator: AN EXTENSIBLE TOOL FOR ARCHITECTURAL DESCRIPTION

As software systems grow, their complexity augments rapidly. In consequence their understandability and evolvability are becoming a difficult task. To address this issue, we have previously defined COSA (Component-Object based Software Architecture), which is a software architecture model that describes systems as a collection of components and connectors. However, COSA has been undertaken with academic rather than commercial goals. This paper presents a modeling tool (called COSABuilder) and instantiating tool (called COSAInstantiator) for COSA metamodel and describes their various features. Our contribution is not only offering MDA-based tools but also automatic instantiation and automatic verification of software architecture specifications. The goal is to preserve architecture traceability features in the modeling space and to create accurate architectures.

Context-aware quality model driven approach: a new approach for quality control in pervasive computing environments

This paper presents extension of MDA called Context-aware Quality Model Driven Architecture (CQ-MDA) which can be used for quality control in pervasive computing environments. The proposed CQ-MDA approach based on ContextualArchRQMM (Contextual ARCHitecture Quality Requirement MetaModel), being an extension to the MDA, allows for considering quality and resources-awareness while conducting the design process. The main idea of presented extension consists in three abstractions levels: PIM (Platform Independent Model), CPIM (Contextual Platform Independent Model) and CPSM (Contextual Platform Specific Model). At the PIM level, a model decomposed into a two interrelated models: software architecture artifacts, which reflect functional requirements and quality model. At the CPIM level a simultaneous transformation of these two models with contextual information details is elaborated and then refined to a specific platform at the CPSM level. Such a procedure ensures that the transformation decisions should be based on the quality assessment of the created models.

MMSA: metamodel multimedia software architecture

Interoperability explains how two or more systems or components exchange and process information. The heterogeneity communication mechanisms of the components (GPRS, WIFI, Bluetooth, ZigBee, etc.), transmission speed, as well as the variety of the media (sound, video, text, and image) they manage have a strong influence on the interoperability. That requires the management of the adaptation to an abstract level in order to avoid ad hoc nonreusable, and/or generalizable solutions. In this paper we propose a metamodel for architectures with heterogeneous multimedia components. It enables the description of the software architectures as a collection of components manipulating various types and formats of data, and interacting between them via specific adaptation connectors.

UML-profile for multimedia software architectures

Multimedia technology is increasingly being used to create reliable and effective communication environments. However, the design of multimedia applications is currently driven more by intuition than by empirically or theoretically derived design guidelines. In a multimedia application, the software architecture is defined as a set of components manipulating various multimedia data types with specific constraints that we must take into consideration at the architectural design. For instance, the problem of heterogeneity related to the exchanged of multimedia data flows. In the absence of prescriptive architectural design principles, meta-model for multimedia software architecture (MMSA) enables the description of software architectures expressing a multimedia software system as a collection of components which handle various types and formats of multimedia data, and interacts between them via adaptation connectors. This paper proposes a modelling of architectural elements such as: multimedia, application components, communication, etc. and an UML profile for verification and validation of MMSA architectures and detection of heterogeneities between components communicating with multimedia flows.

CSDMAP: cloud semantic-based dynamic multimodal adaptation platform

Currently, everybody wish to access to applications from a wide variety of devices (PC, Tablet, Smartphone, Set-top-box, etc.) in situations including various interactions and modalities (mouse, tactile screen, voice, gesture detection, etc.). At home, users interact with many devices and get access to many multimedia oriented documents (hosted on local drives, on cloud storage, on line streaming, etc.) in various conditions and with multiple (and sometimes at the same time) devices. This paper presents an efficient approach to context aware content delivery. We particularly focus on cloud ontology model, as a way to inference users preferences according to different sensitive situations. Thus, we can determine the necessary adaptations that the user has full exploitation of multimedia documents and their use with interactive services in order to help in achieving users preferences under multiples devices constraints with multiple interacting modalities. Our simulation study shows the efficiency and effectiveness of our approach.

Ontology and tool support for quality service management

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 ...

An Adaptation Approach for Component-Based Software Architecture

In this paper we propose a meta-model for architectures with heterogeneous multimedia components. Currently, a generic solution does not exist to automatically deploy a distributed architecture based on multimedia components. The description of the incompatibilities between components is a need in such approaches. Indeed, software architectures validate the functional aspects, which are not sufficient to guarantee a realistic assembly. For instance, the problem of heterogeneity related to the exchanged data flows. In order to highlight these incompatibilities and to find solutions, a model-based approach called MMSA (Meta-model Multimedia Software Architecture) is proposed. It enables the description of the software architectures expressing a software system as a collection of components which handle various types and formats of data, and interacts between them via connectors including the adaptation connectors.