Digital-domain self-calibration technique for video-rate pipeline A/D converters using Gaussian white noise

Electronics Letters Vol.38, nº 19

New simple digital self-calibration technique for pipeline ADCs using the internal thermal noise

IEEE International Symposium on Circuits and Systems, pp. 232 – 235, Seattle, EUA

Efficient digital self-calibration of video-rate pipeline ADCs using white gaussian noise

Proceedings of IEEE, ISCAS 2003, Vol.I, pp. 877-880

Hydrologic modeling and uncertainty analysis of an ungauged watershed using mapwindow-swat

Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies

The effect of demand information sharing in a supply chain under demand uncertainty: a simulation study

Dissertação para obtenção do Grau de Mestre em Engenharia e Gestão Industrial

The design and use of annual budgets to cope with uncertainty

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Finance from the NOVA – School of Business and Economics

Gestão de infra-estruturas e avaliação de equipamentos laboratoriais

RESUMO: A confiabilidade e qualidade dos resultados clínicos de um laboratório, estão dependentes da qualidade do equipamento onde estes são processados. A qualidade de um equipamento consiste em apresentar resultados com uma confiabilidade metrológica de acordo com os processos de medição realizados. Desta forma, os equipamentos de medição devem conter características metrológicas de acordo com os requisitos dos processos que estão inseridos, tais como: erro máximo, incerteza, resolução… Todos os equipamentos por muito bons que sejam, apresentam perdas das suas características metrológicas ao longo do tempo, o que se torna importante a determinação periódica das suas calibrações, manutenções e o seu respectivo ajuste. A periodicidade das calibrações, devem ser baseadas, em critérios bem estabelecidos de modo a evitar a ocorrência da não conformidade, devido às medições com os equipamentos fora das suas especificações, garantindo-se assim, a confiabilidade metrológica e o aumento da produtividade devido ao controlo dos processos, evitando-se desta forma qualquer tipo de avaria por parte destes. Os normativos de Qualidade e Certificação estabelecem como requisito a calibração dos equipamentos de medição em intervalos adequados, mas não definem claramente qual o intervalo adequado. O importante é gerir as etapas de calibração e manutenção de acordo com os equipamentos de modo a garantir que os resultados emitidos por estes sejam mantidos em condições confiáveis, dentro do período entre calibrações e manutenções, de modo a que nãoocorra uma condição de falha, e por conseguinte, medições com grande quantidade de erros.------------ ABSTRACT: The reliability and quality of the results of a clinical laboratory, are dependent on the quality of the equipment where they are processed. The quality of a product is to present results with a metrological reliability according to the measuring processes carried out. Thus, measuring equipment must contain metrological characteristics according to the requirements of the processes that are included, such as: maximum error, uncertainty, resolution ... All equipment for very good they are, show losses of its metrological characteristics over time, it becomes important to determine its periodic calibrations, maintenance and its adjustment. The frequency of calibrations should be based on well-established criteria in order to avoid the occurrence of non-compliance due to the measurements with the equipment beyond its specifications, thus ensuring the metrological reliability and increased productivity due to the control of processes, thus avoiding any kind of damage on the part thereof. The normative and Quality Certification as a requirement to establish calibration of measuring equipment at appropriate intervals, but not clearly stipulate the proper range. It is important to manage the steps of calibration and maintenance equipment according to ensure that the results emitted by these conditions are maintained in trusted within the period between calibrations and maintenance, sothat there occurs a fault condition, and therefore, large amount of measurements with errors.

Calibration, selection and mosaicing of SMART-1 AMIE images

Dissertação para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores

Uncertainty, generalization, and neural representation of relevant variables for decision making

Dissertation presented to obtain the Ph.D degree in Biology, Computational Biology.

UNCERTAINTY AND DECISION-MAKING IN THE HUMAN BRAIN

Dissertation presented to obtain the Ph.D degree in Biology, Neuroscience

Support in decision-making under uncertainty: a project risk assessment tool development and supplementary advances

A foremost dispute that persists on the contemporary world’s agenda is change. The on-going social/technological/economic changes create a competitive and challenging environment for companies to endure. To benefit from these changes, world economies partially depend on emerging Small and Medium Enterprises (SMEs) and their adaptability skills, and subsequently the development of an integrated capability to innovate has become the prime strategy for most of SMEs to subsist and grow. However, innovation and change are always somewhat bonded to an inherent risk development, which subsequently brings on the necessity of a revision of risk management approaches in innovative processes, whose importance SMEs tend to disregard. Additionally, little efforts have been made to improve and create empirical models, metrics and tools to assist SMEs managing latent risks in their innovative projects. This work seeks to present and discuss a solution to support SMEs in engaging on systematic risk management practices, which consists on an integrated risk assessment and response support web-based tool - Spotrisk® - designed for SMEs. On the other hand, an inherent subjectivity is linked with risk management and identification processes, due to uncertainty trait of its nature, for each individual perceives situations according to his own idiosyncrasy, which brings complications in normalizing risk profiles and procedures. This essay aims to bring insights concerning the support in decision-making processes under uncertainty, by addressing issues related with the risk behavior character among individuals. To address such issues, subjects of neuroscience or psychology are explored and models to identify such character are proposed, as well as models to improve presented tool. This work attempts to go beyond the restrictive aim of endeavoring on technical improvement dissertation, and in embraces an exploratory conceptualization concerning micro, small and medium businesses’ traits regarding risk characters and project risk assessment tools.

Uncertainty in olfactory decision-making

Relationships between accuracy and speed of decision-making, or speed-accuracy tradeoffs (SAT), have been extensively studied. However, the range of SAT observed varies widely across studies for reasons that are unclear. Several explanations have been proposed, including motivation or incentive for speed vs. accuracy, species and modality but none of these hypotheses has been directly tested. An alternative explanation is that the different degrees of SAT are related to the nature of the task being performed. Here, we addressed this problem by comparing SAT in two odor-guided decision tasks that were identical except for the nature of the task uncertainty: an odor mixture categorization task, where the distinguishing information is reduced by making the stimuli more similar to each other; and an odor identification task in which the information is reduced by lowering the intensity over a range of three log steps. (...)