Percorrer por autor "Oliveira, José Luís"
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- AgentAPI: an API for the development of managed agentsPublication . Lopes, Rui Pedro; Oliveira, José LuísManaged agents, namely SNMP agents, costs too much to develop, test and maintain. Although assuming simplicity since its origins, the SNMP model has several intrinsic aspects that make the development of management applications a complex task. However, there are tools available which intend to simplify this process by generating automatic code based on the management information definition. Unfortunately, these tools are usually complicated to use and require a strong background of programming experience and network management knowledge. This paper describes an API for managed agent development which also provides multiprotocol capabilities. Without changing the code, the resulting agent can be managed by SNMP, web browsers, wap browsers, CORBA or any other access method either simultaneously or individually.
- An approach to self management based on automatic diagnosticsPublication . Lopes, Rui Pedro; Oliveira, José LuísManagement operations imply, most of the time, the implementation of prevention policies in order to avoid faults and to provide expeditious answers to those faults. This paper present an architecture that allows to infer about network symptoms and to correlate these with well-known anomalies in order to provide the adequate diagnostic that will drive to the fault repair.
- An OpenEHR repository based on a native XML databasePublication . Velte, Linda; Pedrosa, Tiago; Costa, Carlos Manuel Azevedo; Oliveira, José LuísOpenEHR is an open standard specification that describes the management, storage, retrieval and exchange of data in Electronic Health Record (EHR). Despite its growing importance in the field, the lack of open source solutions is hindering a larger visibility. In this paper we present an openEHR-based repository supported by a native XML database, which allows to store and query OpenEHR records through the DB service layer and a set of REST web services. The obtained results highlight the efficiency of this API and show that it can be used as a persistence component in any OpenEHR solution.
- Application scenarios for distributed management using SNMP expressionsPublication . Lopes, Rui Pedro; Oliveira, José LuísManagement distribution is an, we can say, old topic in terms of the number of proposed solutions and publications. Recently, the DISMAN workgroup suggested a set of MIB modules to address this matter in the context of SNMP. One of the DISMAN modules has the capability of using expressions to perform decentralized processing of management information – the Expression MIB. Although existing for some time now, its capabilities are not very well known. In fact, other DISMAN MIBs, such as the Schedule MIB and the Script MIB already got some attention in several papers and are target of very solid work. There are hardly any papers describing the Expression MIB and its functionality. This paper contributes to eliminate this absence by describing our implementation effort around it as well as some real world applications for it.
- Concepts for a personal health recordPublication . Santos, Cândido; Pedrosa, Tiago; Costa, Carlos Manuel Azevedo; Oliveira, José LuísHealthcare is about information. It is usually assumed that personal health information exists primarily for professional's use but well informed patients motivate better informed professionals. A longitudinal health record containing a patient's medical history has been the holy grail of healthcare. Personal Electronic Health Records (P-EHR) hold the potential to transform healthcare by providing a complete set of patient managed information. We present a portable P-EHR's functionalities from the patient's perspective.
- Controlo transaccional em sistemas de gestão de redes por políticasPublication . Roque, Vitor; Oliveira, José Luís; Lopes, Rui PedroA gestão das redes tornou-se, nos últimos anos, um tema de máxima importância para as empresas dado que a sua organização, os fluxos de informação e métodos de trabalho, quer interna quer externamente, estão cada vez mais dependente do bom funcionamento de redes de comunicações. Esta dependência faz com que a disponibilidade e desempenho destas infra-estruturas e serviços sejam actualmente factores determinantes para o seu sucesso. Tem-se assistido também a um aumento quer a nível de tamanho, quer a nível de complexidade das redes, o que implica o desenvolvimento rápido de mecanismos de configuração normalizados para que a sua gestão seja feita de uma forma eficaz e rápida. Espera-se que estes mecanismos estejam também fortemente ligados a sistemas de tolerância a falhas bem como a sistemas de gestão de desempenho. O conceito de gestão por políticas surgiu nos últimos anos como o paradigma “ideal” para tratar este tipo de necessidades. As aplicações de gestão de rede por políticas para configuração de rede em domínios administrativos podem ser bastante complexas a nível da própria estrutura, bem como devido aos relacionamentos possíveis de existir entre as suas partes constituintes. Apesar dos mecanismos de controlo transaccional terem vindo a ser relegados para plano secundário no âmbito da gestão de redes, a sua implementação assume um papel cada vez mais importante, nomeadamente no contexto de gestão baseada em políticas. Neste artigo apresenta-se um mecanismo de controlo transaccional para sistemas de gestão de redes por políticas.
- Delegation of expressions for distributed SNMP information processingPublication . Lopes, Rui Pedro; Oliveira, José LuísDue to the scalability problems of SNMP, management distribution has been an important topic during the last years. The DISMAN workgroup propose a set of MIB modules to address this matter. One of the DISMAN modules has the capability of using expressions to perform decentralized processing of management information - the Expression MIB. Although it is essential to network management, the Expression MIB is not as well known as other DISMAN modules, such as the Script MIB, and not as available in terms of implementations. This paper focuses on the Expression MIB features, its implementation details and it also discusses, from a critical point of view, its functionality. It also proposes minor changes which can boost its application range and importance.
- Descrição e implementação de uma MIB para sistemas MASIFPublication . Lopes, Rui Pedro; Oliveira, José LuísEste artigo descreve a arquitectura, o desenvolvimento e alguns resultados de um conversor SNMP para MASIF. O sistema permite gerir plataformas de agentes compatíveis com a especificação MASIF através de qualquer aplicação gestora SNMP, simplificando, desta forma, a integração de tecnologia de agentes móveis com plataformas de gestão clássicas. A estrutura de informação associada pode funcionar igualmente com uma interface de gestão para sistemas não compatíveis com MASIF.
- Development of management entities for heterogeneous scenariosPublication . Lopes, Rui Pedro; Oliveira, José LuísManaged agents are essential in communication networks. However, the development of agents is an expensive and a complex task. Although there are tools available which intend to simplify this process by generating automatic code based on the management information definition (MIB files), these are usually complicated to use and are generally coupled with a specific protocol stack. This paper describes an API for managed agent development which provides multiprotocol capabilities. Using the same code, the resulting agent can be managed by SNMP, web browsers, wap browsers, CORBA or any other access method either simultaneously or individually. The communication engines are provided as SOXJ LQV that can be installed in runtime.
- Discovery of biomedical databases through semantic questioningPublication . Pereira, Arnaldo; Almeida, João Rafael; Lopes, Rui Pedro; Pazos, Alejandro; Oliveira, José LuísMany clinical studies are greatly dependent on an efficient identification of relevant datasets. This selection can be performed in existing health data catalogues, by searching for available metadata. The search process can be optimised through questioning-answering interfaces, to help researchers explore the available data present. However, when searching the distinct catalogues the lack of metadata harmonisation imposes a few bottlenecks. This paper presents a methodology to allow semantic search over several biomedical database catalogues, by extracting the information using a shared domain knowledge. The resulting pipeline allows the converted data to be published as FAIR endpoints, and it provides an end-user interface that accepts natural language questions.