Hypothesis Tests
Mostrando 25-36 de 528 artigos, teses e dissertações.
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25. Using Software R in research in occupational therapy
Resumo O presente artigo tem como objetivo fornecer subsídios para que pesquisadores em terapia ocupacional possam realizar procedimentos de estatística básica de maneira mais flexível e independente, a partir do sistema R, um software livre e gratuito, cuja popularidade vem aumentando consideravelmente no âmbito acadêmico. Apresentar-se-á, assim, o p
Cad. Bras. Ter. Ocup.. Publicado em: 2019-01
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26. Consideration of the appropriate variation sources of the statistical model and their impacts on plant breeding
ABSTRACT. The present work has aimed to assess the consideration of the appropriate variation sources of the statistical model and their impacts on the conclusions plant breeding. The Value for Cultivation and Use test was conducted to assess three common locations (Lages, Ponte Serrada, and Canoinhas) and four non-common locations (Chapecó, Guatambu, Uruss
Acta Sci., Agron.. Publicado em: 17/12/2018
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27. Effect of hydroxyurea (HU) on gelatinization mechanism of type I collagen suspensions
ABSTRACT Mutant hemoglobins thermodynamic phase transitions (HbS, HbC, etc.) have been the causes of serious hemoglobinopathies that have been affecting mankind since the dawn of human race. HbS polymerization is the best known of these transitions and the original cause of sickle cell anemia. Hydroxyurea (HU, NH2CONHOH) is widely used as the main drug admin
Matéria (Rio J.). Publicado em: 06/12/2018
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28. Pulp canal obliteration after traumatic injuries in permanent teeth – scientific fact or fiction?
Abstract: Pulp canal obliteration (PCO) is a frequent finding associated with pulpal revascularization after luxation injuries of young permanent teeth. The underlying mechanisms of PCO are still unclear, and no experimental scientific evidence is available, except the results of a single histopathological study. The lack of sound knowledge concerning this p
Braz. oral res.. Publicado em: 18/10/2018
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29. Obtención de aceros de baja aleación con diferentes contenidos de Ni y similares microestructuras y propiedades mecánicas
ABSTRACT Low alloy steels are used in many applications in the oil and gas industry. The addition of Ni in these steels improves their low temperature fracture toughness and hardenability, with a low penalty on weldability. However, ISO 15156-2 standard restricts Ni content up to a 1 wt% limit, requiring additional and expensive tests if higher Ni steels are
Matéria (Rio J.). Publicado em: 19/07/2018
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30. GAUSSIAN SPATIAL LINEAR MODEL OF SOYBEAN YIELD USING BOOTSTRAP METHODS
ABSTRACT This study aims to quantify the uncertainties associated to the parameters of a Gaussian spatial linear model (GSLM) and the assumption of normality residuals in the modeling of the spatial dependence of the soybean yield as a function of soil chemical attributes. The spatial bootstrap methods were used to determine the point and interval estimators
Eng. Agríc.. Publicado em: 2018-01
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31. Are Country and Size Risks Priced in the Brazilian Stock Market?
Abstract When estimating a firm's cost of equity for valuation and other purposes in emerging markets without (or with only partial) capital market integration, many practitioners include a premium for country risk. In principle, the inclusion of such a risk factor would be justified if the particular country of interest was not sufficiently integrated into
BAR, Braz. Adm. Rev.. Publicado em: 20/04/2017
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32. Catechol-O-methyltransferase (COMT) polymorphisms modulate working memory in individuals with schizophrenia and healthy controls
Objective: Cognitive impairment is a core feature of schizophrenia, related to dopaminergic dysfunction in the prefrontal cortex (PFC). It is hypothesized that functional single nucleotide polymorphism (SNP) rs4680 of the catechol-O-methyltransferase (COMT) gene could mediate the relationship between cognition and dopamine activity in the PFC. Other COMT SN
Rev. Bras. Psiquiatr.. Publicado em: 02/03/2017
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33. Correlation between the degree of correction of neuromuscular scoliosis and patient quality of life
OBJECTIVE: There are few data on patient satisfaction with surgery for the correction of neuromuscular scoliosis or on the correlation between patient satisfaction and the degree of curve correction achieved by surgery. Our aim was to determine the correlations between both patient satisfaction and perception of quality of life and the degree of curve corre
Clinics. Publicado em: 2017-02
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34. Snake assemblages of Marajó Island, Pará state, Brazil
ABSTRACT We describe the diversity, natural history and structure of snake assemblages from Marajó Island, state of Pará, Brazil, after analyzing 439 specimens deposited in herpetological collections. We tested the hypothesis that snake assemblages from forest and open areas of Marajó Island are distinct with regard to their structure, composition and fun
Zoologia (Curitiba). Publicado em: 11/03/2016
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35. Environmental severity promotes phylogenetic clustering in campo rupestre vegetation
The stress-dominance hypothesis postulates that the importance of competition in plant communities declines with increasing environmental stress while the importance of environmental filters increases. To test this hypothesis for campo rupestre vegetation, we analyzed phylogenetic diversity and community structure of angiosperm communities at two study sites
Acta Bot. Bras.. Publicado em: 2015-12
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36. Statistical evaluation of a novel SSVEP-BCI stimulation setup based on depth-of-field
Abstract Introduction The main drawback of a Brain-computer Interface based on Steady-State Visual Evoked Potential (SSVEP-BCI) that detects the emergence of visual evoked potentials (VEP) in reaction to flickering stimuli is its muscular dependence due to users must redirect their gaze to put the target stimulus in their field of view. In this work, a nove
Res. Biomed. Eng.. Publicado em: 30/10/2015