Age-related differences in time-limit performance and force platform-based balance measures during one-leg stance

Poor posture control has been associated with an increased risk of falls and mobility disability among older adults. This study was conducted to assess the test-retest reliability and sensitivity to group differences regarding the time-limit (TLimit) of one-leg standing and selected balance parameters obtained with a force platform in older and young adults. A secondary purpose was to assess the relationship between TLimit and these balance parameters. Twenty-eight healthy older adults (age: 69±5years) and thirty young adults (age: 21±4years) participated in this study. Two one-leg stance tasks were performed: (1) three trials of 30s maximum and (2) one TLimit trial. The following balance parameters were computed: center of pressure area, RMS sway amplitude, and mean velocity and mean frequency in both the anterio-posterior and medio-lateral directions. All balance parameters obtained with the force platform as well as the TLimit variable were sensitive to differences in balance performance between older and young adults. The test-retest reliability of these measures was found to be acceptable (ICC: 0.40-0.85), with better ICC scores observed for mean velocity and mean frequency in the older group. Pearson correlations coefficients (r) between balance parameters and TLimit ranged from -0.16 to -0.54. These results add to the current literature that can be used in the development of measurement tools for evaluating balance in older and young adults. © 2013 Elsevier Ltd.

Immediate loading of overdentures: systematic review

Introduction: The goal of implant treatment is the formation of a direct bone-implant interface contact. Purpose: This study aimed to evaluate the possibilities of immediate loading treatment for edentulous patients rehabilitated with mandibular and maxillary overdentures. Material and methods: A literature review using the PubMed and BIREME databases between the periods of 1977 and 2011 was performed. Results: From an initial yield of 218 titles, 78 articles were selected for text analysis, finally resulting in 23 studies (16 prospective, 6 prospective randomized, and 1 prospective multicenter) that met the inclusion criteria. Conclusion: The immediate loading protocol through which the implants are subjected to occlusal function immediately after their placement was introduced to overcome this limitation. © 2013 Springer-Verlag Berlin Heidelberg.

Air-particle abrasion on zirconia ceramic using different protocols: Effects on biaxial flexural strength after cyclic loading, phase transformation and surface topography

This study evaluated the effect of different air-particle abrasion protocols on the biaxial flexural strength and structural stability of zirconia ceramics. Zirconia ceramic specimens (ISO 6872) (Lava, 3M ESPE) were obtained (N=336). The specimens (N=118, n=20 per group) were randomly assigned to one of the air-abrasion protocols: Gr1: Control (as-sintered); Gr2: 50 μm Al2O3 (2.5 bar); Gr3: 50 μm Al2O3 (3.5 bar); Gr4: 110 μm Al2O3(2.5 bar); Gr5: 110 μm Al2O3 (3.5 bar); Gr6: 30 μm SiO2 (2.5 bar) (CoJet); Gr7: 30 μm SiO2(3.5 bar); Gr8: 110 μm SiO2 (2.5 bar) (Rocatec Plus); and Gr9: 110 μm SiO2 (3.5 bar) (duration: 20 s, distance: 10 mm). While half of the specimens were tested immediately, the other half was subjected to cyclic loading in water (100,000 cycles; 50 N, 4 Hz, 37 °°C) prior to biaxial flexural strength test (ISO 6872). Phase transformation (t→m), relative amount of transformed monoclinic zirconia (FM), transformed zone depth (TZD) and surface roughness were measured. Particle type (p=0.2746), pressure (p=0.5084) and cyclic loading (p=0.1610) did not influence the flexural strength. Except for the air-abraded group with 110 μm Al2O3 at 3.5 bar, all air-abrasion protocols increased the biaxial flexural strength (MPa) (Controlnon-aged: 1030±153, Controlaged: 1138±138; Experimentalnon-aged: 1307±184-1554±124; Experimentalaged: 1308±118-1451±135) in both non-aged and aged conditions, respectively. Surface roughness (Ra) was the highest with 110 μm Al2O3(0.84 μm. FM values ranged from 0% to 27.21%, higher value for the Rocatec Plus (110 μm SiO2) and 110 μm Al2O3 groups at 3.5 bar pressure. TZD ranged between 0 and 1.43 μm, with the highest values for Rocatec Plus and 110 μm Al2O3 groups at 3.5 bar pressure. © 2013 Elsevier Ltd.

On the regularity of the pressure field of relaxed solutions to Euler equations with variable density

In this paper we improve the regularity in time of the gradient of the pressure field in the solution of relaxed version of variational formulation proposed by V. I. Arnold and by Y. Brenier, for the incompressible Euler equations with variable density. We obtain that the pressure field is not only a measure, but a function in Lloc2((0,T);BVloc(D)) as an extension of the work of Ambrosio and Figalli (2008) in [1] to the variable density case. © 2013 Elsevier Ltd.

Análise cinemática da oscilação corporal de idosos com doença de Parkinson: efeitos da restrição visual

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Proyección regional de la población económicamente activa con la migración considerada como variable endógena

Incluye Bibliografía

Aspectos taxonômicos e amplitude ecológica de Schizomeris leibleinii (Chaetophorales, chlorophyta)

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Equações diferenciais com retardo em biologia de populações: Renato Mendes Coutinho. -

Pós-graduação em Física - IFT

La variable ambiental en la inversión minera transnacional: el caso del cobre en Chile

Incluye Bibliografía

La variable población en la gestión ambiental: un ejemplo de evaluación de impacto ambiental

Incluye Bibliografía

Análise eletromiográfica da postura do profissional de saúde no inícioe fim doexpediente de trabalho

Pós-graduação em Engenharia Mecânica - FEG

Integración regional - la importancia de una geometría variable y de pasos paralelos

Las economías de América Latina han presentado recientemente diversos avances, reflejados en niveles bajos de inflación, dinamismo exportador, mayor atracción de inversores externos, aumento del gasto social, creciente preocupación con la sostenibilidad ambiental del desarrollo, mejora en el perfil de las cuentas públicas, con mejores resultados fiscales y menores deudas, entre otros aspectos. En los últimos años – y en particular en los meses de la última crisis - se ha verificado un menor interés en el tema de la integración regional. Hay beneficios en los procesos de convergencia entre los países de la Región, pero ellos son necesariamente diferenciados, según el conjunto de países considerados. Más importante, y posiblemente más urgente – incluso porque los tiempos de respuesta en el ámbito financiero son menores que en el lado real de la economía – es el reconocimiento de la necesidad de iniciativas conjuntas en términos financieros. No solo el momento parece oportuno para iniciativas en ese sentido, sino que además su éxito puede contribuir muy fuertemente para facilitar la propia integración comercial/productiva.

Estrutura trófica das assembléia de peixes da represa de Jurumirim, alto rio Paranapanema-SP, Brasil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Inclusión de la variable etnia en las fuentes de información sociodemográfica del Ecuador

Las crecientes demandas de participación en la vida social, política y económica de los pueblos y nacionalidades indígenas del Ecuador durante los últimos veinte años han incidido directamente en la visibilización de estos actores como parte constitutiva del país. Existen varias cifras sobre el número de habitantes indígenas en el Ecuador, lo que ha impulsado un debate sobre la validez de las diferentes metodologías de recolección de información que permita tener datos desagregados por condición étnica, y lo que es más importante sobre las condiciones de vida de los pueblos y nacionalidades indígenas y las brechas de equidad que se observan en cuanto a indicadores de desarrollo entre los distintos grupos de población. El presente documento es una síntesis de la revisión de los instrumentos de recolección de información que incluyen la variable “etnia” y las diferentes formas de capturar el dato. Revisión que involucró el análisis crítico de cada uno de los procesos por parte de los responsables técnicos de la producción de las estadísticas y también con los representantes de las nacionalidades y pueblos indígenas del Ecuador con la finalidad de identificar las limitaciones de los instrumentos y/o las dificultades del proceso que hace que los pueblos indígenas se sientan sub representados en las estadísticas oficiales.

Distribuição espacial dos decapoditos e caranguejos juvenis num estuário tropical

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)