Implementação de um modelo baseado em XML para suporte da dinâmica processual de negócio

Este artigo descreve um modelo para implementação de plataformas dinâmicas de negócio, exclusivamente baseadas em tecnologias XML. Apresenta um caso real que implementa as suas diversas camadas, apresentação, lógica e dados, em XML. A comunicação entre camadas é assegurada por serviços Web (WS), tornando esta arquitectura orientada aos serviços (SOA). O modelo proposto sustenta toda a programação do processo de negócio numa linguagem de alto nível, o WS-BPEL, proporcionando, desse modo, condições de adaptação ao dinamismo exigido pelo negócio da organização e à heterogeneidade dos sistemas. O caso real é de uma secretaria electrónica que surge no contexto dos portais Web universitários. O sistema desenvolvido visa oferecer um conjunto de serviços para acesso a informação e para o despoletar de acções computacionais e/ou humanas.

Procedimentos de informação portuária electrónica

A integração de sistemas é uma necessidade cada vez mais necessária face à exigência e competitividade dos negócios. Uma forma de respondermos a estes factos é através da tecnologia, acompanhando-a e aprofundando-a. O presente documento apresenta uma proposta de solução tecnológica a estes factos. O caso que iremos abordar trata-se da necessidade de renovar o sistema de gestão portuária a nível nacional, garantido uma continuidade de negócio, assim como a implementação de novas funcionalidades que permitam a esta plataforma ser totalmente independente e integrável com outros sistemas e/ou adaptável a outras organizações no futuro. SOA, Service Oriented Architecture, foi a filosofia adoptada para garantir a facilitação do tráfego marítimo através da harmonização de processos e procedimentos entre os vários portos, fundamentalmente no referente à interconexão e interoperabilidade, e a partilha e troca electrónica de informação processual entre os vários membros da comunidade marítima e portuária. ABSTRACT; System integration is a necessity progressively more required due to the business demand and competitiveness. It is possible to respond to the latter facts with technology, by following it and developing it. This study proposes a technological solution for the abovementioned facts. The case to be addressed is the need to renovate the port management system in a nationwide scale, assuring simultaneously the continuity of the business and the implementation of new functionalities that allow for this platform to be utterly independent and applicable to other systems and/or adaptable to other organizations in the future. SOA, Service Oriented Architecture, was the theory adopted to guarantee the simplification of the maritime traffic, by harmonizing the processes and the procedures among the several ports, especially concerning the interconnection and interoperability, and the electronic sharing and exchange of information referent to processes amongst the numerous members of the maritime and port community.

Tutoria da anatomia mamária feminina utilizando uma rede neural artificial interactive activation and competition orientada a serviço

Dissertação (mestrado)—Universidade de Brasília, Faculdade Gama, Programa de Pós-Graduação em Engenharia Biomédica, 2015.

Arte, teatro pós-traumático e loucura : o processo criativo do chicqueiro e a lógica do pato

Dissertação (mestrado)—Universidade de Brasília, Instituto de Artes, 2016.

Modeling the Effect of Vapor Wall Deposition on the Formation of Secondary Organic Aerosol in Chamber Studies

Laboratory chamber experiments are used to investigate formation of secondary organic aerosol (SOA) from biogenic and anthropogenic precursors under a variety of environmental conditions. Simulations of these experiments test our understanding of the prevailing chemistry of SOA formation as well as the dynamic processes occurring in the chamber itself. One dynamic process occurring in the chamber that was only recently recognized is the deposition of vapor species to the Teflon walls of the chamber. Low-volatility products formed from the oxidation of volatile organic compounds (VOCs) deposit on the walls rather than forming SOA, decreasing the amount of SOA formed (quantified as the SOA yield: mass of SOA formed per mass of VOC reacted). In this work, several modeling studies are presented that address the effect of vapor wall deposition on SOA formation in chambers.

A coupled vapor-particle dynamics model is used to examine the competition among the rates of gas-phase oxidation to low volatility products, wall deposition of these products, and mass transfer to the particle phase. The relative time scales of these rates control the amount of SOA formed by affecting the influence of vapor wall deposition. Simulations show that an effect on SOA yield of changing the vapor-particle mass transfer rate is only observed when SOA formation is kinetically limited. For systems with kinetically limited SOA formation, increasing the rate of vapor-particle mass transfer by increasing the concentration of seed particles is an effective way to minimize the effect of vapor wall deposition.

This coupled vapor-particle dynamics model is then applied to α-pinene ozonolysis SOA experiments. Experiments show that the SOA yield is affected when changing the oxidation rate but not when changing the rate of gas-particle mass transfer by changing the concentration of seed particles. Model simulations show that the absence of an effect of changing the seed particle concentration is consistent with SOA formation being governed by quasi-equilibrium growth, in which gas-particle equilibrium is established much faster than the rate of change of the gas-phase concentration. The observed effect of oxidation rate on SOA yield arises due to the presence of vapor wall deposition: gas-phase oxidation products are produced more quickly and condense preferentially onto seed particles before being lost to the walls. Therefore, for α-pinene ozonolysis, increasing the oxidation rate is the most effective way to mitigate the influence of vapor wall deposition.

Finally, the detailed model GECKO-A (Generator for Explicit Chemistry and Kinetics of Organics in the Atmosphere) is used to simulate α-pinene photooxidation SOA experiments. Unexpectedly, α-pinene OH oxidation experiments show no effect when changing either the oxidation rate or the vapor-particle mass transfer rate, whereas GECKO-A predicts that changing the oxidation rate should drastically affect the SOA yield. Sensitivity studies show that the assumed magnitude of the vapor wall deposition rate can greatly affect conclusions drawn from comparisons between simulations and experiments. If vapor wall loss in the Caltech chamber is of order 10^-5 s^-1, GECKO-A greatly overpredicts SOA during high UV experiments, likely due to an overprediction of second-generation products. However, if instead vapor wall loss in the Caltech chamber is of order 10^-3 s^-1, GECKO-A greatly underpredicts SOA during low UV experiments, possibly due to missing autoxidation pathways in the α-pinene mechanism.

Content architecture applications in healthcare

Healthcare delivery is undergoing significant transformation in the United States. Many hospitals and clinics are utilizing electronic means for maintaining patient records. Implementation of electronic health records is now a prevalent activity at many healthcare organizations. Despite the use of electronic health records by many healthcare organizations, it is still difficult to obtain meaningful information from electronic data pertaining to healthcare. Intelligent content applications organize the data within a company make all the data in the organization searchable and retrievable for faster access. This paper therefore explores SOA (Service oriented architecture) and intelligent content architecture in an attempt to suggest better structures that enable retrieval of related data from myriad sources within a company. While intelligent content applications are being slowly developed for areas such as electronic publishing, its use in healthcare organizations has been limited. This paper discusses applications of intelligent content architecture for the healthcare domain.

Consolidating service enginering perspectives

Similar with definition of 'service', the term 'service engineering' (SE) can be broadly defined based on the context and the referring domain. This paper explores the evolutionary definition of SE, with later emphasis on IT/IS perspective. The paper begin with general definition of service and service engineering before elaborating IT perspectives on IT. A review on service orientation, Service Oriented Architecture (SOA) and Service Oriented Methodology (SOM) is also provided in the final part, before concluded with conclusion and suggested future work. In a more general perspective of Service Science, SE is defined as a process of developing newly specified business service, while in IT perspective SE alternately defined as applying service-orientation approach in an enterprise and its IT infrastructure, closely related with SOA approach. Therefore, to consolidate both perspectives, SE can be applied for designing specific business services, as the original definition, combined with bottom up, or meet-in-the-middle approach in the conception of software services during the analysis.

O impacto da publicação de relatórios de sustentabilidade no desempenho financeiro das empresas portuguesas

O presente trabalho tem como objetivo apresentar evidências empíricas sobre o impacto da divulgação de informação sobre práticas ambientais pelas empresas portuguesas no seu desempenho financeiro. Este estudo justifica-se pela perceção de que as empresas, em geral, estão muito preocupadas em divulgar as práticas ambientais praticadas para satisfazer a necessidade de informação dos stakeholders, cada vez mais conscientes dos problemas ambientais quer a nível local ou mundial. Perante este cenário, cada vez mais as empresas produzem relatórios de sustentabilidade, pelo que se torna evidente a necessidade de avaliar o retorno dessa decisão em termos financeiros. No seguimento de um enquadramento teórico sobre estudos realizados sobre esta temática e seus resultados, e adotando a metodologia sugerida por Lo et. al (2012) foi realizado um estudo de evento, cujo evento é a publicação do primeiro relatório de sustentabilidade para 38 empresas portuguesas, para analisar o retorno anormal dos indicadores ROA (Return On Assets), ROS (Retur On Sales) e SOA (Sales On Assets) e assim verificar a existência, ou não, de algum impacto. Com base nos resultados obtidos conclui-se que não podemos afirmar que a publicação voluntária do relatório de sustentabilidade tem algum impacto positivo no desempenho financeiro das empresas portuguesas.

Converged network-cloud service composition with end-to-end performance guarantee

The crucial role of networking in Cloud computing calls for federated management of both computing and networkin resources for end-To-end service provisioning. Application of the Service-Oriented Architecture (SOA) in both Cloud computing an networking enables a convergence of network and Cloud service provisioning. One of the key challenges to high performanc converged network-Cloud service provisioning lies in composition of network and Cloud services with end-To-end performanc guarantee. In this paper, we propose a QoS-Aware service composition approach to tackling this challenging issue. We first present system model for network-Cloud service composition and formulate the service composition problem as a variant of Multi-Constraine Optimal Path (MCOP) problem. We then propose an approximation algorithm to solve the problem and give theoretical analysis o properties of the algorithm to show its effectiveness and efficiency for QoS-Aware network-Cloud service composition. Performanc of the proposed algorithm is evaluated through extensive experiments and the obtained results indicate that the proposed metho achieves better performance in service composition than the best current MCOP approaches Service (QoS).

Keyword search for building service-based systems

With the fast growth of applications of service-oriented architecture (SOA) in software engineering, there has been a rapid increase in demand for building service-based systems (SBSs) by composing existing Web services. Finding appropriate component services to compose is a key step in the SBS engineering process. Existing approaches require that system engineers have detailed knowledge of SOA techniques which is often too demanding. To address this issue, we propose KS3 (Keyword Search for Service-based Systems), a novel approach that integrates and automates the system planning, service discovery and service selection operations for building SBSs based on keyword search. KS3 assists system engineers without detailed knowledge of SOA techniques in searching for component services to build SBSs by typing a few keywords that represent the tasks of the SBSs with quality constraints and optimisation goals for system quality, e.g., reliability, throughput and cost. KS3 offers a new paradigm for SBS engineering that can significantly save the time and effort during the system engineering process. We conducted large-scale experiments using a real-world Web service dataset to demonstrate the practicality, effectiveness and efficiency of KS3.