O aqueduto das águas livres como elemento dinamizador e regenerador do eixo Lisboa-Sintra

Dissertação para obtenção do grau de Mestre em Arquitectura com especialização em Urbanismo, apresentada na Universidade de Lisboa - Faculdade de Arquitetura. Assuntos:O Aqueduto das Águas Livres construído no século XVIII com a finalidade de abastecer a cidade de Lisboa em água potável é uma obra notável de engenharia hidráulica e arquitectónica, que dada a sua grandiosidade e o seu valor patrimonial foi classificado como monumento nacional. Não obstante este facto, tem vindo ao longo dos anos a ser menosprezado como património de indiscutível valor histórico e cultural que é, especialmente depois de ter deixado de transportar as suas águas até à cidade de Lisboa, em meados do século passado. Neste trabalho pretende-se não só requalificar este majestoso equipamento de extensão notável que percorre cinco municípios, como também revalorizá-lo, podendo servir para coser territórios desconexos devido à sua qualidade de elemento agregador. O seu valor histórico poderia também congregar e realçar todo o património cultural da região que atravessa. Dada a sua intrínseca ligação com a estrutura hidrológica, ecológica e morfológica da cidade, assume-se que a recuperação do Aqueduto poderia levar à sua reintegração na cidade. A nível urbanístico, admitindo esta infraestrutura como paisagem, pretende-se que sirva como charneira para organizar tecidos urbanos. Tendo em vista os objectivos acima delineados, procedeu-se em primeiro lugar a uma análise histórica, cultural e arquitectónica do Aqueduto e da sua relação com a evolução da cidade e das suas infraestruturas. Interpretou-se depois o território atravessado por este equipamento público, visando a identificação dos seus riscos e das suas debilidades, mas igualmente das suas valências e oportunidades. De seguida, estabeleceram-se pontes entre o conhecimento da paisagem e os corredores verdes, procurando respostas para a criação de um novo espaço livre que potencie e divulgue o património cultural existente. O trabalho proposto resultou na elaboração de uma estratégia territorial que permite dinamizar as áreas atravessadas pelo Aqueduto. Inferiu-se que a construção de um sistema de parques híbrido, conectado por um novo Corredor Verde, prolongando o existente, de Lisboa até à Amadora, aliado a uma estratégia de mobilidade suave com uma nova rede de pontos notáveis de interesse cultural, irá articular tecidos urbanos actualmente fragilizados e desconexos, reforçando assim a ligação entre a cidade e os territórios periurbanos e rurais. Este corredor seguirá o trajecto do Aqueduto até à sua intersecção com a ribeira de Carenque, e, através da criação de um Parque Linear ao longo deste curso de água, requalificará a nível ambiental o vale que atravessa e fomentará a preservação e divulgação do património cultural do Aqueduto até ao local da sua génese na Mãe de Água Velha.ABSTRACT: The Águas Livres Aqueduct, built in the eighteenth century to supply the city of Lisbon in drinking water, is a remarkable work of hydraulic and architectural engineering that due to its magnificence and patrimonial value was classified as national monument. Its unquestionable historical and cultural value has, however, over the years been increasingly disregarded, especially since it ceased to carry its waters to the city of Lisbon, in the middle of the last century. This work aims the requalification of this remarkable structure that covers five counties and that, given its capacity to become an aggregating element, will serve to relink disconnected territories. Its historic value could also bring together and highlight all the cultural heritage of the areas that it crosses. Given its intrinsic connection with the hydrological, ecological and morphological structure of the city, one assumes that recovering the Aqueduct could lead to its reintegration in the city. At the urban level, admitting that this infrastructure is part of the landscape, it will serve as a hinge to organize the urban fabric. In view of the above-mentioned objectives, an initial historical, cultural and architectural analysis of the Aqueduct and its relationship with the city and respective infrastructures was carried out. The territory crossed by this public facility was afterwards studied in order to identify not only territorial risks but also future opportunities. Following this study, connections were established between landscape knowledge and green corridors, in order to find answers regarding the creation of a new free space in the city that will enhance and promote the existing cultural heritage. The proposed work resulted in the development of a territorial strategy that will provide a boost for the areas crossed by the aqueduct. It was further concluded that the construction of a hybrid park system, connected by a new Green Corridor that would extend the existing corridor, from Lisbon to Amadora, combined with a smooth mobility strategy composed of a new network of cultural points of interest, would articulate current urban fabric that is fragile and disconnected, thus reinforcing the link between the city and peri-urban and rural areas. This corridor will follow the route of the aqueduct until it intersects with the stream of Carenque and through the creation of a linear park, along this waterway, the valley will be environmentally rehabilitated, fostering the preservation and promotion of the Aqueduct´s cultural heritage up to the place of its origin, in the Mãe de Água Velha

A Negotiation Model for CSCW

Colloque avec actes et comité de lecture. internationale./http://www.springerlink.comInternational audienceThe aim of this paper is to present our model for a generic and flexible negotiation service and its implementation in Computer Supported Collaborative Work (CSCW) environments. Within a cooperative work environment, users naturally need negotiation support mechanisms to study possible alternatives in group decision making. The objective of our work is to build a negotiation model independent of any particular application field. Contrary to studied models, our model focuses on formalizing the negotiation from three points of view: exchanged information between the agents to negotiate (the language), the way this information is exchanged (the protocol), and the internal behavior of an agent (the tactics). In addition to a separation of the problems involved in each one of these three facets of the negotiation, this approach allows also a greater flexibility than traditional systems dedicated to one kind of problems. We chose to use a transactional approach based on speech acts to develop our axiom based negotiation model which has been implemented as a negotiation service in our CSCW environment DisCOO. After the tackled problem presentation, we will expose the state of the art, then the proposed negotiation formal model, and, finally, the implementation

Dynamic Interconnection of Enterprise Workflow Processes

Colloque avec actes et comité de lecture. internationale./http://www.taylorandfrancis.co.uk/International audienceDue to business process automation development, process interconnection becomes an important matter. Actually, process interconnection mechanisms are indispensable to co-ordinate business processes within and beyond organisation boundaries, aiming, for instance, to strength awareness inside virtual enterprises, to facilitate multinational e-transactions, etc. Therefore, thinking and proposing mechanisms to ensure interconnection between organisational business processes is becoming a hot research topic. Actually, existing business process modelling and enactment systems (workflow systems, project management tools, shared agendas, to do lists, etc.) have been mainly developed to suit enterprise internal needs. Thus most of these systems are not adapted to inter-enterprise co-operation. As we are interested in workflow process integration, we aim, through this paper, to provide a model supporting dynamic inter-enterprise workflow process interconnection.We consider the interconnection of enterprise workflow processes as the management of a workflow of workflows in which several heterogeneous workflow management systems (WFMS) coexist. This paper introduces our process interconnection model, its implementation, and its validation through an experimentation

Un modèle d'interaction de services pour la coopération des procédés

Colloque avec actes et comité de lecture. nationale.National audienceLa conception ou la réalisation de tout projet un tant soit peu conséquent sous-entend l'implication d'un certain nombre de personnes, voire d'un certain nombre d'équipes ou d'entreprises. Ces entreprises interagissant et échangeant des données, de plus en plus via Internet et le "Web", on parle alors d'entreprise virtuelle. Cependant, il ne suffit pas simplement d'échanger des données pour travailler ensemble, il faut aussi contrôler et gérer ces échanges dans le cadre d'une démarche. Chaque entreprise possédant sa propre démarche et donc son propre procédé d'entreprise, la collaboration entre ces entreprises signifie l'interconnexion de ces procédés d'entreprise. Si plusieurs outils de coordination de travail existent, ils ont été développés pour les besoins internes d'une entreprise et sont mal adaptés à la collaboration inter-entreprises. L'approche qui nous a semblés la plus prometteuse pour l'interconnexion de procédés d'entreprises différentes et hétérogènes est l'approche orientée services. L'objectif de cet article est la description d'un modèle d'interaction de services pour l'interconnexion de procédés d'entreprise. Ce modèle se base sur le partage d'information entre services procédés et la coordination de services procédés. Dans cet article, après la description de l'approche orientée service, nous présenterons notre modèle d'interaction de services de manière formelle tout en nous servant d'un exemple support pour illustrer notre propos et appliquer cette formalisation à un cas concret. Nous présenterons enfin et de manière succincte comment ce modèle d'interaction de services procédés est mis en oeuvre au sein de notre prototype DISCOBLE (DIStributed CO-operation and Business prOcess on LinE) réalisé en Java au-dessus d'un bus CORBA

Harnessing the power of data and event data for Business Process Improvement

International audienceFaced with a competitive and a continuous changing environment, traditional approaches that treat a company as a closed environment are no longer appropriate. To overcome this problem of isolation and non-communication, organizations tend to increasingly use Business Process Management-BPM. Recently with the rise of new technologies such as of big data, Internet of things, Cloud computing, etc, organizations are faced with many factors and challenges that generate real changes in the traditional BPM. Among these challenges, we have the huge amount of data and event data that are continuously gathered. Such data must be adequately exploited to extract high added value that can assist the organization in its decision making process. However, traditional BPM systems present different limits, as they do not facilitate the use of knowledge extracted from this data by business processes, because they do not benefit from statistical functionalities and data analysis and manipulation techniques. Several researches have been done in this area to link event data and data analysis to BPM by using, for example, process mining or machine learning algorithms. This paper shows how data and event data are the key to get a better understanding of the functioning of business processes, and to start the journey of business process improvement towards a stateful, context-aware, and proactive business process

Priority-based Event Management using Fuzzy Logic for an IoT-BPM Architecture

International audienceInternet of things (IoT) world is growing at a breathtaking pace. This new paradigm shift affects all the enterprise architecture layers from infrastructure to business. Organizations are nowadays faced with new challenges to keep their quality of service and competitive advantage over other rival organizations. Business Process Management (BPM) is a field among others that will be affected by this new technology. Both IoT and BPM communicate through events, and effective and efficient management of those events ensures a better communication channel between the IoT physical layer and the Business layer. However, the huge amount of those IoT generated events and sometimes the subtle difference between their criticality level, generate uncertainty regarding their priority level determination. In this paper, we propose a fuzzy logic-based event management approach to estimate the criticality level of the incoming IoT events using two fuzzy inference systems (FIS) and to manage the priority of business process instances triggered by those events. A case study is presented and the obtained results from our simulations demonstrate the benefit of our approach and allowed us to confirm the efficiency of our assumptions

An efficient algorithm for workflow graph structural verification

International audienceAny big enterprise is organized around business process hav- ing a value towards its customers and its products. Appropriate definition, analysis, checking and improvement of those business process models are indispensable before their deployment within workflow management systems. In this paper, we focus on business process model verification that insures business process structural correctness. Our proposal consist in a new efficient hybrid algorithm of workflow graph structural validation combining graph reduction and traversal mechanisms. Our al- gorithm will be disussed and compared to existing workflow structural checking approaches from completeness and performance points of view

Les services procédés, une solution pour l'interconnexion des procédés d'entreprises

Article dans revue scientifique avec comité de lecture.L'automatisation des procédés d'entreprises devenant de plus en plus répandue, l'interopérabilité et l'interconnexion de ces procédés s'avèrent incontournables pour la coordination de ces procédés en deçà et au-delà des frontières des organisations. Si un large panel d'outils de coordination de travail existe (workflows, agendas partagés, outils de gestion de projets, outils d'édition coopérative...), ces outils ont été essentiellement développés pour les besoins internes des entreprises et sont, en général, mal adaptés à la coopération interentreprises. l'objectif de cet article est de présenter notre modèle générique d'interconnexion des procédés organisationnels, supportant la visibilité et la dynamicité de l'interconnexion des procédés. Notre modèle se base sur une approche orientée service procédé. l'article présentera nos modèles de procédés, de services procédés et d'interconnexion de services procédés, et leur mise en oeuvre au sein de notre plate-forme coopérative DISCOBOLE (DIStributed COoperation and Business prOcess on LinE)

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DISCOBOLE: A Service Architecture for Interconnecting Workflow Processes

International audienceProcess interconnection mechanisms are necessary to co-ordinate geographically distributed business processes in order to strength awareness inside virtual enterprises, to facilitate multinational e-transactions, etc. Actually, existing business process modelling and enactment systems (workflow systems, project management tools, shared agendas, to do lists, etc.) have been mainly developed to suit enterprise internal needs. Thus, most of these systems are not adapted to inter-enterprise co-operation. As we are interested in workflow processes, we aim, through this paper, to present a model supporting dynamic heterogeneous workflow process interconnection. We consider the interconnection of enterprise workflow processes as the management of a “workflow of workflows” in which several heterogeneous workflow systems coexist. This paper introduces our process interconnection model, its implementation, and its validation through experimentation