Segmented Regression
Mostrando 13-23 de 23 artigos, teses e dissertações.
-
13. Voxel-based morphometry findings in Alzheimer's disease: neuropsychiatric symptoms and disability correlations - preliminary results
INTRODUCTION: The role of structural brain changes and their correlations with neuropsychiatric symptoms and disability in Alzheimer's disease are still poorly understood. OBJECTIVE: To establish whether structural changes in grey matter volume in patients with mild Alzheimer's disease are associated with neuropsychiatric symptoms and disability METHODS: Nin
Clinics. Publicado em: 2011
-
14. Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity
Growth curves models provide a visual assessment of growth as a function of time, and prediction body weight at a specific age. This study aimed at estimating tinamous growth curve using different models, and at verifying their goodness of fit. A total number 11,639 weight records from 411 birds, being 6,671 from females and 3,095 from males, was analyzed. T
Revista Brasileira de Ciência Avícola. Publicado em: 2007-03
-
15. Brain plasticity induced by motor training : a study with professional typist / Plasticidade cerebral associada ao treino motor prolongado : um estudo com digitadores profissionais
Background: Long-term training of specific motor tasks is associated with automatic execution of movements. Functional adaptation induced by training results in performance improvement. It is not yet fully understood whether functional adaptation is reflected by plasticity changes in brain structure. Objectives: We aimed to investigate the presence and degre
Publicado em: 2007
-
16. Study of follicle deviation and ovulatory capacity in buffaloes (Bubalus bubalis) and zebu cattle (Bos indicus) / Estudo da divergência folicular e da capacidade ovulatória em bubalinos (Bubalus bubalis) e zebuínos (Bos indicus)
Present study is presented in Chapter 1 (Follicle deviation; FD) and 2 (Ovulatory capacity). Each chapter includes two experiments [1 - in buffaloes (Bubalus bubalis); 2 - in zebu cattle (Bos indicus)]. In Chapter 1, aims were to determine moment and diameter deviation and to evaluate FSH and LH plasmatic profiles encompassing follicle selection. In Experime
Publicado em: 2006
-
17. Analysis of the demand and models of hedonic prices in the real estate market of the city of Fortaleza / AnÃlise da demanda e modelos de preÃos hedÃnicos no mercado imobiliÃrio da cidade de Fortaleza
The present work consists of the study of the economical determinants that contribute to the formation of the prices of the real estate market of the city of Fortaleza (CearÃ), in the optics of the economical agents of demand, based in the hedonic or implicit prices theory. The model considered for the work investigates implicit prices in the curve of utili
Publicado em: 2004
-
18. Desenvolvimento de funções de base GTO : aplicação de metodo da coordenada geradora atraves da tecnica de discretização integral otimizada
A systematic approach to obtaining GTO basis sets from atomic calculations at the Hartree-Fock leveI, employing the principIes of the Generator Coordinate Method (GCM) and the Optimized Integral Discretization technique (OID) is proposed. The discussion is centered on the formulation of a finite discretized space of GTO functions. Special attention is paid t
Publicado em: 1992
-
19. Timing of peak bone mass in Caucasian females and its implication for the prevention of osteoporosis. Inference from a cross-sectional model.
To determine the timing of peak bone mass and density, we conducted a cross-sectional study of bone mass measurements in 265 premenopausal Caucasian females, aged 8-50 yr. Bone mass and bone mineral density were measured using dual X-ray absorptiometry and single-photon absorptiometry at the spine (anteroposterior, lateral), proximal femur, radius shaft, dis
-
20. Reverse homeosis in homeotically reconstructed ribbonworms
Homeosis is the replacement of one body part by another, which may be caused by either developmental or genetic variations. It is particularly obvious in segmented animals, like insects, in which one body segment may be transformed into another. However, homeosis also occurs in animals without overt segmentation that also have detailed positional information
The National Academy of Sciences.
-
21. Comparative impacts of two major hurricane seasons on the Neuse River and western Pamlico Sound ecosystems
Ecosystem-level impacts of two hurricane seasons were compared several years after the storms in the largest lagoonal estuary in the U.S., the Albemarle–Pamlico Estuarine System. A segmented linear regression flow model was developed to compare mass-water transport and nutrient loadings to a major artery, the Neuse River Estuary (NRE), and to estimate mean
National Academy of Sciences.
-
22. Health and re-employment in a two year follow up of long term unemployed.
STUDY OBJECTIVE--The aim was to examine re-employment and changes in health during a two year follow up of a representative sample of long term unemployed. DESIGN--This was a cross sectional study and a two year follow up. Health was measured by psychometric testing, Hopkins symptom checklist, General health questionnaire, and medical examination. Health rel
-
23. Identification of inflections in T-cell counts among HIV-1-infected individuals and relationship with progression to clinical AIDS
Studies of circulating T (CD3+) lymphocytes have shown that on a population basis T-cell numbers remain stable for many years after HIV-1 infection (blind T-cell homeostasis), but decline rapidly beginning approximately 1.5–2.5 years before the onset of clinical AIDS. We derived a general method for defining the loss of homeostasis on the individual level
The National Academy of Sciences.