No / Analysis of existing literature reveals the growing need to tackle the issue of unified data dissemination. Where this issue has been given some focus, the outreach has been more or less limited to similar systems (i.e. cross-instance collaboration) and no particular focus has been applied on the problem of exposing this data or knowledge to third parties (i.e. cross-vendor collaboration). This paper proposes an integration of semantic technologies within the Web of Things based on the concept and principles of the Service-Oriented Architecture to realize a distributed and semi-autonomous collaboration framework that is capable of offering cross-vendor information exchange and collaboration facilities. Powered by a semantic engine and exposed as a web application with a RESTful API, the generic framework realizes an extensible knowledge management and exchange system that accounts for the dynamic landscape in business-centric Web of Things applications. Disaster management is taken as a potential application scenario to critically analyse and evaluate the system prototype and show that the asset model for the proposed framework is sufficiently capable of meeting the modern-day and next-generation collaboration needs in a world of ever-increasing cross-vendor information sharing.

Bindings are used to make a software library accessible in languages other than those that the library was originally written for. However, creating and maintaining large amounts of bindings for every library is time-consuming and costly. An alternative approach to bringing functionality to more languages is to use a service-oriented architecture, where functionality is provided as services accessible from another process through message passing. Various middlewares exist to enable message passing between processes. In this thesis, some of the state of the art messaging middlewares are explored and evaluated them in terms of various criteria. Emphasis is given to their suitability for programmable built for industrial vehicles. Three of the most suitable middlewares are used to implement small systems based on a service-oriented architecture for further evaluation. The results indicate that the Data Distribution Service is the most promising candidate, owing to its interface description language, language support, and relatively low RAM and disk space usage. / Bindings används för att göra ett mjukvarubibliotek tillgängliga i andra språk än de som biblioteket till en början var gjort för. Att skapa och underhålla bindings för varje bibliotek är dock tidskrävande och kostsamt. Ett alternativt sätt att tillhandahålla funktionalitet till fler språk är att använda en tjänsteorienterad arkitektur där funktionalitet finns tillgänglig i tjänster som andra processer använder via meddelandeöverföring. Det finns flera mellanprogramvaror för meddelandeöverföring mellan processer. I denna uppsats undersöks några av de främsta mellanprogramvarorna i förhållande till en mängd kriterier, med fokus på hur lämpliga de är för programmerbara displays gjorda för industriella fordon. För ytterligare utvärdering används de tre mest lämpliga mellanprogramvarorna för att implementera små system baserade på en tjänstorienterad arkitektur. Resultaten tyder på att Data Distribution Service är den mest lovande kandidaten tack vare dess Interface Description Language, språkstöd och relativt låga användning av RAM och diskutrymme.

Over the last years, online learning has gained significant popularity, and this trend is expected to continue in the future. Online learning is a multi-dimensional activity where each dimension should be adequately supported by an online learning system to provide a fruitful learning experience to its users. Similar to online learning, a particular approach in the way systems are designed has gained increasing popularity over the last years as a result of the emergence of the computer network. Systems have started to be envisioned as integrated collections of components that are deployed over the network. This network-centric approach addresses some of the issues that are not directly addressed by the traditional architectural design approaches. We believe that such an approach can be employed for the architectural design of online learning environments (OLEs) where different dimensions of online learning are addressed by different components residing on the network. This thesis presents a network-centric system architecture for OLEs. The architecture is based on the Service-Oriented Architecture (SOA) paradigm and web services. The proposed architecture is described using a number of Department of Defense Architecture Framework (DoDAF) representations. We also developed a quality model for OLEs and evaluated the architecture using this quality model. We believe that this research is an important first step in reconciling those two emerging ideas, namely online learning and network-centric architecture. This reconciliation is important as the flexible nature of SOA can be very useful in creating OLEs that address a wide variety of user needs. / Master of Science

Software-Defined Radio (SDR) is a large field of research, and is rapidly expanding in terms of capabilities and applications. As the number of SDR platforms, deployments, and use-cases grow, interoperability, compatibility, and software re-use becomes more difficult. Additionally, advanced SDR applications require more advanced hardware and software platforms to support them, necessitating intelligent management of resources and functionality. Realizing these goals can be done using the paradigms of Component-Based Design (CBD) and Service-Oriented Architectures (SOAs). Component-based design has been applied to the field of SDR in the past to varying levels of success. We discuss the benefits of CBD, and how to successfully use CBD for SDR. We assert that by strictly enforcing the principles of CBD, we can achieve a high level of independence from both the hardware and software platforms, and enable component compatibility and interoperability between SDR platforms and deployments. Using CBD, we also achieve the use-case of a fully distributed SDR, where multiple hardware nodes act as one cohesive radio unit. Applying the concept of service-orientation to SDR is a novel idea, and we discuss how this enables a new radio paradigm in the form of goal-oriented autonomic radios. We define SOAs in the context of SDR, explain how our vision is different than middle-wares like CORBA, describe how SOAs can be used, and discuss the possibilities of autonomic radio systems. This thesis also presents our work on the Cognitive Radio Open Source Systems (CROSS) project. CROSS is a free and open-source prototype architecture that uses CBD to achieve platform independence and distributed SDR deployments. CROSS also provides an experimental system for using SOAs in SDRs. Using our reference implementation of CROSS, we successfully demonstrated a distributed cognitive radio performing dynamic spectrum access to communicate with another SDR while avoiding an interferer operating in the spectrum. / Master of Science

We describe CoSMo, a Cognitively Inspired Service and Model Architecture for situational awareness and monitoring of vehicular traffic in urban transportation systems using a network of wireless sensors. The system architecture combines (i) a cognitively inspired internal representation for analyzing and answering queries concerning the observed system and (ii) a service oriented architecture that facilitates interaction among individual modules, of the internal representation, the observed system and the user. The cognitively inspired model architecture allows one to effectively respond to deductive as well as inductive queries by combining simulation based dynamic models with traditional relational databases. On the other hand the service oriented design of interaction allows one to build flexible, extensible and scalable systems that can be deployed in practical settings. To illustrate our concepts and the novel features of our architecture, we have recently completed a prototype implementation of CoSMo. The prototype illustrates advantages of our approach over other traditional approaches for designing scalable software for situational awareness in large complex systems. The basic architecture and its prototype implementation are generic and can be applied for monitoring other complex systems. CoSMo's architecture has a number of features that distinguish cognitive systems. This includes: dynamic internal models of the observed system, inductive and deductive learning and reasoning, perception, memory and adaptation. This thesis describes the service oriented model and the associated prototype implementation. Two important contributions of this thesis include the following: The Generic Service Architecture - CoSMo's service architecture is generic and can be applied to many other application domains without much change in underlying infrastructure. Integration of emerging web technologies - Use of Web Services, UPnP, UDDI and many other emerging technologies have taken CoSMo beyond a prototype implementation and towards a real production system. / Master of Science

In this thesis, we present a framework for managing changes in service oriented enterprises (SOEs). A service oriented enterprise outsources and composes its functionality from third-party Web service providers. We focus on changes initiated or triggered by these member Web services. We present a taxonomy of changes that occur in service oriented enterprises. We use a combination of several types of Petri nets to model the triggering changes and ensuing reactive changes. The techniques presented in our thesis are implemented in WebBIS, a prototype for composing and managing e-business Web services. Finally, we conduct an extensive simulation study to prove the feasibility of the proposed techniques. / Master of Science

We describe CoSMo, a Cognitively Inspired Service and Model Architecture for situational awareness and monitoring of vehicular traffic in urban transportation systems using a network of wireless sensors. The system architecture combines (i) a cognitively inspired internal representation for analyzing and answering queries concerning the observed system and (ii) a service oriented architecture that facilitates interaction among individual modules, of the internal representation, the observed system and the user. The cognitively inspired model architecture allows effective deductive as well as inductive reasoning by combining simulation based dynamic models for planning with traditional relational databases for knowledge and data representation. On the other hand the service oriented design of interaction allows one to build flexible, extensible and scalable systems that can be deployed in practical settings. To illustrate our concepts and the novel features of our architecture, we have recently completed a prototype implementation of CoSMo. The prototype illustrates advantages of our approach over other traditional approaches for designing scalable software for situational awareness in large complex systems. The basic architecture and its prototype implementation are generic and can be applied for monitoring other complex systems. This thesis describes the design of cognitively-inspired model architecture and its corresponding prototype. Two important contributions include the following: • The cognitively-inspired architecture: In contrast to earlier work in model driven architecture, CoSMo contains a number of cognitively inspired features, including perception, memory and learning. Apart from illustrating interesting trade-offs between computational cost (e.g. access time, memory), and correctness available to a user, it also allows users specified deductive and inductive queries. • Distributed Data Integration and Fusion: In keeping with the cognitively-inspired model-driven approach, the system allows for an efficient data fusion from heterogeneous sensors, simulation based dynamic models and databases that are continually updated with real world and simulated data. It is capable of supporting a rich class of queries. / Master of Science

This study investigates the feasibility and performance of SLAM (Simultaneous Localization and Mapping) as a service (SLAM-as-a-Service) for outdoor augmented reality (AR) applications. Given the rapid advancements in AR technology, integrating lightweight AR glasses with real-time SLAM capabilities poses significant challenges, particularly due to the computational demands of SLAM algorithms and the limited hardware capacity of AR devices. This study proposes a scalable SLAM-as-a-Service framework that offloads intensive computational tasks to remote servers, leveraging cloud and edge computing resources. The ORB-SLAM3 algorithm, known for its robustness and real-time processing capabilities, was adapted and implemented in a service-oriented architecture. The framework was evaluated using the EuRoC dataset to benchmark processing speed, accuracy, and round trip time. The results indicate that while the proposed SLAM-as-a-Service model shows promise in handling high computational loads, several obstacles need to be addressed to achieve minimal round trip time and ensure a seamless AR experience. This thesis contributes to the development of scalable and efficient AR solutions by addressing the limitations of on device processing and highlighting the potential of cloud-based services in enhancing the performance and feasibility of AR applications in dynamic outdoor environments.

Le travail de recherche présenté dans ce mémoire s’intéresse aux problèmes d’interopérabilité dans le domaine du Product Lifecycle Management (PLM) et vise à proposer une méthodologie capable d’y remédier. Nous définissons l’objectif stratégique du PLM comme la maîtrise de la complexité qui caractérise le développement et le suivi des produits. Dans ce cadre, l’objectif de l’interopérabilité est le contrôle des interactions entre constituants de ce système complexe PLM. Nous montrons que cet objectif est atteint si on assure la continuité et la conservation du flux sémantique qui circule dans le système. Notre étude est restreinte aux seuls domaines de la conception et de la production, mais a l’ambition de pouvoir s’appliquer à d’autres domaines. La continuité du flux sémantique est assurée par une architecture que nous avons baptisée « médiation multi-échelle orientée services ». Le cœur de cette architecture, le médiateur, se charge d’orienter les flux sémantiques vers les systèmes concernés, et met en correspondance sémantique les informations échangées en s’appuyant sur un méta-modèle d’unification. Nous montrons que pour assurer la robustesse, la flexibilité et l’agilité du système ainsi constitué, il faut privilégier le choix d’un méta-modèle standard générique et extensible. A cet effet, nous proposons une cartographie du standard STEP permettant de choisir le méta-modèle pertinent. Nous illustrons le choix et la définition de ce méta-modèle dans le cas de deux problèmes d’interopérabilité des domaines de la conception et de la production : l’interopérabilité CAO/PDM et l’interopérabilité PDM/ERP. Nous expliquons notre démarche dans la mise en œuvre de la norme PLCS. Par ailleurs, nous introduisons un modèle d’annotations sémantiques du produit qui permet de reconstruire des vues multiples correspondant à différents besoins métiers. Un ensemble de démonstrateurs permet de valider nos propositions et nos résultats. / Research work presented in this manuscript deals with interoperability issues in the domain of Product Lifecycle Management (PLM) and aims at proposing a methodology able to remedy it. We define the objective of PLM as the control of the complexity that characterizes the development and monitoring of the product. In this context, the objective of the interoperability is to control the interactions between components of this PLM complex system. We demonstrate that this objective is reached if we ensure the continuity and the conservation of the semantic flow inside the system. Our study is restricted to design and production fields, but can be extended to other domains. The continuity of the semantic flow is guaranteed by an architecture that we entitled “service-oriented multi-layered mediation”. The main part of this architecture, the mediator, takes care to orientate the semantic flows towards the adequate systems, and semantically connect the exchanged information by relying on an unification meta-model. We demonstrate that, to ensure the robustness the flexibility and the agility of the so-constituted system, the choice of a generic and extensible standard meta-model should be favored. We thus proposed a mapping of STEP standard allowing to choose the adequate meta-model. We illustrate the choice and the definition of this meta-model in the case of two interoperability problems in the design and production domains: the interoperability CAD/PDM and the interoperability PDM/ERP. We illustrate our methodology in the implementation of the PLCS standard. Moreover, we introduce a model of product semantic tags that allows to rebuild the multiple product views corresponding to different actor needs. A set of demonstrators validate our propositions and our results.

Orientador: Eleri Cardozo / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-06T07:45:33Z (GMT). No. of bitstreams: 1 Souza_VictorAlexandreSiqueiraMarquesde_M.pdf: 2295226 bytes, checksum: 9e36093f901c39f33bc909f01e4bd421 (MD5) Previous issue date: 2006 / Resumo: Novos serviços de rede devem ser desenvolvidos e gerenciados de acordo com os requisitos específicos dos clientes. Nesse contexto, provedores de serviço devem criar uma nova forma de projetar serviços de rede com tempo de desenvolvimento próximo a zero e alto nível de customização e evolução. A customização é necessária para criação de serviços que satisfaçam aos requisítos do cliente enquanto evolução é necessária para adaptar o serviço assim que esses requisitos se alterem. Além disso, clientes têm demandado a capacidade de gerenciar o serviço para manter o uso, configuração e evolução sob seu controle. Este trabalho apresenta uma abordagem baseada na arquitetura orientada a serviço para o desenvolvimento de serviços de rede capazes de cumprir os requisitos de rápida instalação, customização e gerenciamento por parte do cliente. Esta abordagem considera os serviços de rede como um conjunto de elementos interativos implementados como serviços web. A lógica do serviço é expressa através da orquestração de serviços web. Dois serviços para o gerenciamento de conexões em redes ópticas são apresentados como estudo de caso / Abstract: New generation network services must be developed and managed according to the customers' specific requírements. In this context, service providers must devise a way to design network services with near zero development time and high degrees of customization and evolution. Customízation is necessary to fit the service according to the customers requirements, while evolutíon is necessary to adapt the service as soon as these requírements change. ln addition, customers are demanding the ability to manage the service in order to keep the usage, configuratíon, and evolution under their control. This paper presents an approach based on Service Oriented Archítecture (SOA) for developing network services able to fulfill the requirements of rapid deployment, customization, and customer-side manageability. The approach considers the network service as a set of interactíng elements implemented as web services. The service logic is expressed in terms of web services orchestration. Two services for the management of connections in optical networks are presented as a case study / Mestrado / Engenharia de Computação / Mestre em Engenharia Elétrica