Mobility-aware Software-Defined Service-Centric Networking for Service Provisioning in Urban Environments

Disruptive applications for mobile devices, such as the Internet of Things, Connected and Autonomous Vehicles, Immersive Media, and others, have requirements that the current Cloud Computing paradigm cannot meet. These unmet requirements bring the necessity to deploy geographically distributed computing architectures, such as Fog and Mobile Edge Computing. However, bringing computing close to users has its costs. One example of cost is the complexity introduced by the management of the mobility of the devices at the edge. This mobility may lead to issues, such as interruption of the communication with service instances hosted at the edge or an increase in communication latency during mobility events, e.g., handover. These issues, caused by the lack of mobility-aware service management solutions, result in degradation in service provisioning. The present thesis proposes a series of protocols and algorithms to handle user and service mobility at the edge of the network. User mobility is characterized when user change access points of wireless networks, while service mobility happens when services have to be provisioned from different hosts. It assembles them in a solution for mobility-aware service orchestration based on Information-Centric Networking (ICN) and runs on top of Software-Defined Networking (SDN). This solution addresses three issues related to handling user mobility at the edge: (i) proactive support for user mobility events, (ii) service instance addressing management, and (iii) distributed application state data management. For (i), we propose a proactive SDN-based handover scheme. For (ii), we propose an ICN addressing strategy to remove the necessity of updating addresses after service mobility events. For (iii), we propose a graph-based framework for state data placement in the network nodes that accounts for user mobility and latency requirements. The protocols and algorithms proposed in this thesis were compared with different approaches from the literature through simulation. Our results show that the proposed solution can reduce service interruption and latency in the presence of user and service mobility events while maintaining reasonable overhead costs regarding control messages sent in the network by the SDN controller

Drivers of digital transformation adoption: A weight and meta-analysis

Cavalcanti, D. R., Oliveira, T., & Santini, F. D. O. (2022). Drivers of digital transformation adoption: A weight and meta-analysis. Heliyon, 8(2), 1-17. [e08911]. https://doi.org/10.1016/j.heliyon.2022.e08911 --------------------------- Funding: This work was supported by national funds through FCT (Fundação para a Ciência e a Tecnologia) under the project - UIDB/04152/2020 - Centro de Investigação em Gestão de Informação (MagIC).The advent of the global pandemic has accelerated the growing need for product and service transformation, highlighting the emerging importance of technology and creating the opportunity to update the digital transformation (DT) domain through empirical-quantitative research. This weight and meta-analysis enabled the synthesis and integration of previous literature on the scope of individual DT adoption, evaluating the state of the art and filling a void on the subject. Athwart 88 studies and 99 datasets by international sources, our results demonstrate that attitude and satisfaction are relevant predictors of behavioral intentions and promising outcomes, including compatibility and personal innovativeness. Behavioral intentions, satisfaction, and habit are the best predictors for DT use. Usefulness and ease of use are critical for DT adoption intention and use, being moderated by individualism, as a cultural factor, human capital, and knowledge-technology, as innovation indicators. We present a conceptual model of promising and best predictors for future research on DT individual adoption.publishersversionpublishe

Valor em risco operacional com cópulas de valores extremos

Monografia (graduação)—Universidade de Brasília, Instituto de Exatas, Departamento de Estatística, 2012.Desde Mandelbrot (1963) e Fama (1965), dados financeiros e de riscos, como dados de perdas, taxas de câmbio, índices econômicos e retornos em geral, são, em sua maioria, modelados por distribuições de cauda pesada. A partir da modelagem das distribuições de perdas em Risco Operacional é necessário construir um modelo conjunto para que se estabeleçam pressupostos apropriados sobre a dependência entre as variáveis de perdas e também para que se possa obter o valor em risco operacional (VaROp) da perda operacional total. As funções cópula são reconhecidas como ferramentas poderosas para tais fins. Portanto, através de cópulas de valores extremos pretende-se obter o modelo conjunto associado às distribuições de perdas, permitindo o cálculo do capital regulatório mínimo, associado ao VaROp, que a instituição financeira deve alocar para perdas operacionais e o estabelecimento da estrutura de dependência entre os tipos de perdas

Gastos públicos municipais e crescimento econômico no Estado do Rio de Janeiro

ABSTRACT This study aims to determine how important the public sector, through their spending, influences the growth rates of GDP (Gross Domestic Product) in the municipalities of Rio de Janeiro. Studies in this line are justified by the growth of the powers of sub-national levels of government, or fiscal decentralization. The base case relates to the decentralization more efficient provision of public goods, a fact allowed by the proximity between demand and supply of public goods. The results suggest that the public sector does not interfere with GDP growth in the cities of Rio de Janeiro. The investments were the largest category with its own momentum of economic growth and a model that included the occurrence of elections as an explanatory variable showed that election lawsuits not only affect the level of GDP, but also how it is affected by public spending. Key words Public Finance; development; cities. Classificação JEL: O23. Artigo recebido em out. 2009 e aceito para publicação em dez. 2010.ENDEREÇO PARA ENVIO DE PUBLICAÇÃO: RODRIGO VILELA RODRIGUES Rua Professora Francisca de Queiroz, 328. Sorocaba - São Paulo CEP: 18.040-325 DIEGO OLIVEIRA PEIXOTO Universidade Federal Fluminense Faculdade de Administração da Escola de Ciências Humanas e Sociais da UFF Volta RedondaRESUMO O presente trabalho tem como objetivo fundamental verificar como o setor público, através de seus gastos, influencia as taxas de crescimento do Produto Interno Bruto (PIB) nos municípios do Estado do Rio de Janeiro. Estudos nessa linha justificam-se pelo crescimento das atribuições dos níveis subnacionais de governo, ou descentralização fiscal. A hipótese base relaciona a descentralização à oferta mais eficiente de bens públicos, fato permitido pela proximidade entre demanda e oferta do bem público. Os resultados sugerem que o setor público não interfere no crescimento do PIB nos municípios do Rio de Janeiro. Os investimentos foram a categoria com maior capacidade propulsora de crescimento econômico, e uma modelagem que incluiu a ocorrência de eleições como variável explicativa mostrou que pleitos eleitorais afetam não somente o nível do PIB, mas também a forma como o mesmo é afetado pelo gasto público. Palavras-chav

Avaliação da atividade lipolítica de actinomicetos isolados de processo de compostagem

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A IMPLEMENTAÇÃO DOS PROCEDIMENTOS CONTÁBEIS PATRIMONIAIS E A TRANSPARÊNCIA FISCAL

This research is dedicated to assessing the influence of the adoption of the Plan for the Implementation of Equity Accounting Procedures - PIPCP on the tax transparency index of Brazilian states. The descriptive, documentary, quantitative research has a sample composed of data from the 26 Brazilian states and the Federal District, analyzed in the period between 2014 to 2019. To measure the relationship, a Pearson univariate correlation was applied, through regression analysis tobit. The findings contribute as a basis for social control and for managers, professionals in the public area and the Courts of Auditors, when they demonstrate that accounting is showing reliable and comparative information, reinforcing the benefits of fiscal transparency. As a result, the evidence pointed to a positive relationship between the levels of Implementation of PIPCP in the Brazilian states and the level of fiscal transparency, suggesting that the modernization of Accounting in the public sector tends to issue up-to-date and quality financial information.Esta pesquisa dedica-se a avaliar a influência da adoção do plano de Implementação dos Procedimentos Contábeis Patrimoniais - PIPCP sobre o índice fiscal dos estados brasileiros. A pesquisa descritiva, documental, quantitativa, tem amostra por dados oriundos dos 26 estados brasileiros e o Distrito Federal, importação no período entre 2014 a 2019. Para mensurar a relação, aplicou-se uma correlação univariada Pearson , por meio da análise de regressão tobit. Os achados contribuem como base para o controle social e para gestores, profissionais da área pública e Tribunais de Contas, quando demonstram que a contabilidade está evidenciando as informações solicitadas e comparativas, reforçando os benefícios da transparência fiscal.Como resultado, as evidências apontaram uma relação positiva entre os níveis de Implementação do PIPCP dos estados brasileiros e o nível de transparência fiscal, sugerindo que a modernização da Contabilidade no setor público tende a emitir informações financeiras atualizadas e de qualidade

When the earth stood still: air pollution during the Covid-19 quarantine – the case of São Paulo and Rio de Janeiro

In March 2020, the World Health Organization declared a global pandemic due to the new coronavirus (COVID-19). Several countries responded to this threat by introducing quarantine measures to reduce the transmission of COVID-19 in the community. These measures have drastically reduced human activities, causing an impact on urban air pollution due to the associated reduction in automobile use and other polluting activities. We investigated this effect with measurements of Particulate Material (PM10), Carbon Monoxide (CO), Nitrogen Dioxide (NO2) and Ozone (O3), carried out by the environmental departments of the cities of São Paulo and Rio de Janeiro, for two months in 2020. We compared them with data for the corresponding months in 2019, relating to the social isolation index, measured by the Mathematics and Statistic Institute of São Paulo (IME-USP). The results show a significant decrease in NO2 and CO and an increase in O3, and little change in Particulate Material.In March 2020, the World Health Organization declared a global pandemic due to the new coronavirus (COVID-19). Several countries responded to this threat by introducing quarantine measures to reduce the transmission of COVID-19 in the community. These measures have drastically reduced human activities, causing an impact on urban air pollution due to the associated reduction in automobile use and other polluting activities. We investigated this effect with measurements of Particulate Material (PM10), Carbon Monoxide (CO), Nitrogen Dioxide (NO2) and Ozone (O3), carried out by the environmental departments of the cities of São Paulo and Rio de Janeiro, for two months in 2020. We compared them with data for the corresponding months in 2019, relating to the social isolation index, measured by the Mathematics and Statistic Institute of São Paulo (IME-USP). The results show a significant decrease in NO2 and CO and an increase in O3, and little change in Particulate Material

Skin model and some processing properties of a drilling simulation in the abdominal

We know that the skin is a complex organ, and there is a need to measure the complex mechanical properties of the human skin by means of a mathematical representation capable of simulating the deformations that occur during the movements of the body and surgical procedures. We propose for this modeling an analogy between: a) resistance represented by the shock absorber, in this study the modeling will be based on the compression cycle, which occurs once the needle is inserted in the skin, compressing it; b) elasticity given by a spring with a rigidity k; and c) mass, which in turn constitutes the systems inertia resistance to displacement. With the proposed analysis of skin perforation we aim to obtain a model by relating the force applied by the needle to its velocity in the hypodermis. The results shows the steps outlined to convert the analogous system of human skin into a liaison graph, Bond Graph. As discussed by the authors, all data concerning skin are embedded in uncertainty, due especially to the following factors: spatial distribution of the organ, build and dimensions of the individual and lack of specific literature. The skin was thus modeled through a methodology based on the comparison between the real system and a model of the real system. This paper shows the mechanical model that represents skin and the injection in a procedure of abdominal perforation