Covariance
Mostrando 1-12 de 398 artigos, teses e dissertações.
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1. Seguro contra risco de downside de uma carteira : uma proposta híbrida frequentista-Bayesiana com uso de derivativos
Seguros de carteiras proporcionam aos gestores limitar o risco de downside sem renunciar a movimentos de upside. Nesta dissertação, propomos um arcabouço de otimização de seguro de carteira a partir de um modelo híbrido frequentista-Bayesiano com uso de derivativos. Obtemos a distribuição conjunta de retornos regulares através de uma abordagem estat
Publicado em: 230113
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2. Assessment of Covariance Selection Methods in High-Dimensional Gaussian Graphical Models
ABSTRACT The covariance selection in Gaussian graphical models consists in selecting, based on a sample of a multivariate normal vector, all those pairs of variables that are conditionally dependent given the remaining variables. This problem is equivalent to estimate the graph identifying the nonzero elements on the off-diagonal entries of the precision mat
Trends in Computational and Applied Mathematics. Publicado em: 2022
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3. Acute changes in glucose induced by continuous or intermittent exercise in children and adolescents with type 1 diabetes
ABSTRACT Objective: To estimate the rate of change during exercise and during recovery in moderate-continuous exercise (MCE) and high-intensity intermittent exercise (HIIE) in children and adolescents with type 1 diabetes (T1D). Subjects and methods: Participants performed 2 sessions of exercise: thirty minutes of continuous activity on a cycle ergometer (
Archives of Endocrinology and Metabolism. Publicado em: 2022
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4. THE GROWTH IN SCIENTIFIC PRODUCTION
ABSTRACT Objective This study aimed to establish the utility values of different health states associated with diabetic retinopathy in a Brazilian sample to provide input to model-based economic evaluations. Subjects and methods This cross-sectional study was performed in a sample of patients with type 2 diabetes mellitus (T2D) who underwent teleophthalm
Acta ortop. bras.. Publicado em: 2020-10
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5. Health-related quality of life associated with diabetic retinopathy in patients at a public primary care service in southern Brazil
ABSTRACT Objective This study aimed to establish the utility values of different health states associated with diabetic retinopathy in a Brazilian sample to provide input to model-based economic evaluations. Subjects and methods This cross-sectional study was performed in a sample of patients with type 2 diabetes mellitus (T2D) who underwent teleophthalm
Arch. Endocrinol. Metab.. Publicado em: 2020-10
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6. Implicações do Covid-19 na oftalmologia
Objective: To compare intraocular pressure (IOP) and macular, retinal nerve fiber layer (RNFL), and ganglion cell layer (GCL) thicknesses in treatment-naive children with attention-deficit/hyperactivity disorder (ADHD), children with ADHD on regular methylphenidate (MPH) treatment for at least 3 months, and healthy controls. Methods: A total of 58 treatmen
Rev. bras.oftalmol.. Publicado em: 2020-06
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7. Assessment of intraocular pressure, macular thickness, retinal nerve fiber layer, and ganglion cell layer thicknesses: ocular parameters and optical coherence tomography findings in attention-deficit/hyperactivity disorder
Objective: To compare intraocular pressure (IOP) and macular, retinal nerve fiber layer (RNFL), and ganglion cell layer (GCL) thicknesses in treatment-naive children with attention-deficit/hyperactivity disorder (ADHD), children with ADHD on regular methylphenidate (MPH) treatment for at least 3 months, and healthy controls. Methods: A total of 58 treatmen
Braz. J. Psychiatry. Publicado em: 2020-06
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8. Neutrophil-lymphocyte ratio in catatonia
Abstract Background There is growing evidence of subclinical inflammation in mental disorders. Objective The aim of this study was to investigate frequency of symptoms of catatonia and the newly diagnosed subclinical inflammatory markers which are neutrophil/lymphocyte (NLR), platelet/lymphocyte (PLR), monocyte/lymphocyte (MLR) ratios in catatonia patien
Arch. Clin. Psychiatry (São Paulo). Publicado em: 2020-04
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9. MULTILEVEL NONLINEAR MIXED-EFFECTS MODEL AND MACHINE LEARNING FOR PREDICTING THE VOLUME OF Eucalyptus SPP. TREES
ABSTRACT Volumetric equations is one of the main tools for quantifying forest stand production, and is the basis for sustainable management of forest plantations. This study aimed to assess the quality of the volumetric estimation of Eucalyptus spp. trees using a mixed-effects model, artificial neural network (ANN) and support-vector machine (SVM). The datab
CERNE. Publicado em: 2020-03
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10. Effectiveness of mindfulness-integrated cognitive behavior therapy on anxiety, depression and hope in multiple sclerosis patients: a randomized clinical trial
Abstract Introduction Multiple sclerosis (MS) is a chronic medical condition that attracts particular attention because of the high risks associated with it. MS patients suffer from medical problems, depression, anxiety, and reduced hopefulness. These issues can increase the severity of the disease and treatment resistance and reduce patients’ individual
Trends Psychiatry Psychother.. Publicado em: 2020-03
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11. Personality disorder and functioning in major depressive disorder: a nested study within a randomized controlled trial
Objective: This study aimed to determine if personality disorder (PD) predicted functional outcomes in patients with major depressive disorder (MDD). Methods: Data (n=71) from a double-blind, randomized, placebo-controlled 12-week trial assessing the efficacy of 200 mg/day adjunctive minocycline for MDD were examined. PD was measured using the Standardized
Braz. J. Psychiatry. Publicado em: 2020-02
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12. Multilevel modeling for longitudinal data: concepts and applications
Abstract Purpose This paper aims to discuss multilevel modeling for longitudinal data, clarifying the circumstances in which they can be used. Design/methodology/approach The authors estimate three-level models with repeated measures, offering conditions for their correct interpretation. Findings From the concepts and techniques presented, the authors can
RAUSP Manag. J.. Publicado em: 13/12/2019