Uncertainty
Mostrando 13-24 de 1076 artigos, teses e dissertações.
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13. Dynamic anisotropy and non-linear geostatistics supporting short term modelling of structurally complex gold mineralization
Abstract Non-linear geostatistical methods are known to deal appropriately with the geological and geometrical complexity of gold deposits. This article reports the results related to an investigation to improve the gold content estimate based on restricted ore modeling to honor the structural aspects that control the mineralization. The grade domains are de
REM, Int. Eng. J.. Publicado em: 2021-06
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14. Validation of an UHPLC-MS/MS Method for the Determination of Malachite Green, Leucomalachite Green, Crystal Violet, and Leucocrystal Violet in Shrimp, Fish, and Salmon Muscle Using a Modified QuEChERS Approach
A quantitative and confirmatory method for detecting the presence of triphenylmethane dyes in shrimp muscle using ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) and a quick, easy, cheap, effective, rugged and safe (QuEChERS) extraction approach was validated. The method exhibited linearity and selectivity and the coeffici
J. Braz. Chem. Soc.. Publicado em: 2021-04
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15. Narcissism, risk and uncertainties: analysis in the light of prospect and fuzzy-trace theories
Abstract Purpose This study aims to analyze the relationship between the nonpathological traits of narcissism and decisions under conditions of uncertainty and risk in light of the prospect (PT) and fuzzy-trace theories (FTT). Design/methodology/approach This paper conducted an empirical-theoretical study with 210 Brazilian academics from the business area
RAUSP Manag. J.. Publicado em: 2021-03
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16. Psychometric properties of the Brazilian Intolerance of Uncertainty Scale – Short Version (IUS-12)
Abstract Introduction The Intolerance of Uncertainty Scale – Short Version (IUS-12) is a measure of trait intolerance of uncertainty. Objective The purpose of the present study was to conduct a cross-cultural adaptation of the IUS-12 for use in Brazil and to investigate the scale’s psychometric properties. Methods The research was conducted via an
Trends Psychiatry Psychother.. Publicado em: 2020-06
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17. Ablação por Cateter sem Uso de Raios X para Tratamento de Fibrilação Atrial e Arritmias Atriais
Abstract Introduction The Intolerance of Uncertainty Scale – Short Version (IUS-12) is a measure of trait intolerance of uncertainty. Objective The purpose of the present study was to conduct a cross-cultural adaptation of the IUS-12 for use in Brazil and to investigate the scale’s psychometric properties. Methods The research was conducted via an
Arq. Bras. Cardiol.. Publicado em: 2020-06
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18. Comparison between traditional project appraisal methods and uncertainty analysis applied to mining planning
Abstract Long-term mining planning is a complex process which involves a large number of variables and uncertainties. Traditional discount cash flow (DCF) is usually used in the evaluation of mining projects. DCF includes net present value (NPV), internal rate of return (IRR), and profitability index (PI). A sensitivity analysis is usually carried out to eva
REM, Int. Eng. J.. Publicado em: 2020-06
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19. Quantification of Arsenic, Cadmium, Mercury and Lead in Pineapple: Method Development, Validation and Evaluation of In-House Reference Materials
A method for quantification of arsenic, cadmium, mercury, and lead in pineapple using inductively coupled plasma-mass spectrometry (ICP-MS) was developed, validated, and used to test the homogeneity and stability of in-house reference materials. The method was tested at the regulation levels given by the Food and Agriculture Organization of the United Nation
J. Braz. Chem. Soc.. Publicado em: 2020-06
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20. Characterization of tomato generations according to a three-way data analysis
ABSTRACT Availability of a three-way data analysis to characterize two consecutive tomato (Solanum lycopersicum) generations is necessary to continue a plant breeding program with less uncertainty. The aim of this work was to analyze tomato fruit quality from F2 and F3 populations by two three-way data analysis: multiple factorial analysis (MFA) and generali
Bragantia. Publicado em: 2020-03
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21. Só erra quem faz, e quem faz erra! um manifesto pelo cálculo da propagação de incertezas
Making experimental measurements, whether we are at peace in the face of such a reality or not, invariably involves experimental uncertainty. Unfortunately, presenting uncertainty alongside the results is not as widespread as it should be. The author attempts here to simplify, improve understanding, and appeal to a healthy living with uncertainty. One of the
Quím. Nova. Publicado em: 2020-02
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22. Factorial validity and measurement invariance of the uncertainty response scale
Abstract This study presents the adaptation of the Uncertainty Response Scale (Greco & Roger, Pers. Individ. Differ, 31:519-534, 2001) to Portuguese. This instrument was administered to a non-clinical community sample composed of 1596 students and professionals, allowing a thorough validity and invariance analysis by randomly dividing participants into three
Psicol. Reflex. Crit.. Publicado em: 13/01/2020
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23. INTEGRATING REAL TIME OPTIMIZATION AND MODEL PREDICTIVE CONTROL OF A CRUDE DISTILLATION UNIT
Abstract This work reports the integration of Real Time Optimization and Model Predictive Control in the multi-layer control structure of an existing Crude Distillation Unit (CDU) of an oil refinery. The MPC considers output control zones and targets for the inputs or outputs. Both the infinite horizon and the finite output horizon controllers were tested. T
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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24. Riscos orçamentários na administração universitária: um estudo de caso no setor público
A administração pública brasileira vive um cenário de crises e incertezas. Diante disso, torna-se fundamental conhecer os possíveis riscos que uma universidade pública corre, suas consequências para o alcance dos seus objetivos institucionais e para o cumprimento de sua função social, além de focar em uma melhor aplicação dos recursos e assim alc
Avaliação (Campinas). Publicado em: 09/12/2019