Buscar
Mostrando ítems 1-10 de 27
The effect of trail length on task partitioning in three Acromyrmex species (Hymenoptera: Formicidae)
(2003-05-19)
By comparing the behavior of three Acromyrmex (Hymenoptera, Formicidae) species during foraging on artificial trails of different lengths, we observed the occurrence of task partitioning and its relation to the food distance ...
Dynamics of the restoration of physical trails in the grass-cutting ant Atta capiguara (Hymenoptera, Formicidae)
(2016-01-01)
Dynamics of the restoration of physical trails in the grass-cutting ant Atta capiguara. Leaf-cutting ants of the genus Atta build long physical trails by cutting the vegetation growing on the soil surface and removing the ...
Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model
(Springer, 2016-02-01)
This study proposes a criterion for evaluating the turbulent boundary layer displacement thickness when predicting airfoil trailing-edge noise with semi-empirical methods. The boundary layer integral parameter is usually ...
Longitudinal Study of Foraging Networks in the Grass-Cutting Ant Atta capiguara Goncalves, 1944
(Entomological Soc Brasil, 2020-05-22)
Colonies of leaf-cutting ants of the genus Atta need to collect large quantities of vegetal substrate in their environment to ensure their growth. They do so by building and extending over time a foraging network that ...
Spatio-Temporal Dynamics of Foraging Networks in the Grass-Cutting Ant Atta bisphaerica Forel, 1908 (Formicidae, Attini)
(Public Library Science, 2016-01-11)
Foraging networks are a key element for ant colonies because they facilitate the flow of resources from the environment to the nest and they allow the sharing of information among individuals. Here we report the results ...
Objective measures of unobstructed walking and obstacle avoidance in Parkinson's disease subtypes
(Elsevier B.V., 2018-05-01)
Background: Objective measures of gait in Parkinson's disease (PD) patients according to motor subtypes are not yet fully understood. Although recent advances have been made for unobstructed walking, further work is required ...
OBSTACLE STEPPING and BODY SCALE MODULATING PARAMETERS
(Ammons Scientific, Ltd, 2009-10-01)
The purpose of this study was to investigate gait spatial parameters at the point of departure, with obstacle heights adjusted to individual body scale. Undergraduate student volunteers (M age=22.4 yr., SD=2.1; 6 women, 1 ...
Color Trails Test: a Brazilian normative sample
(Pontificia Universidade Católica do Rio de JaneiroUniversidade de BrasíliaUniversidade de São Paulo, 2010)
The present study aims to evaluate psychometric data on the population of Brazil using of the Color Trails Test (CTT). The instrument was applied to 1,942 subjects who came from the north (1.4%), northeast (10.4%), midwest ...
Spanwise-coherent hydrodynamic waves around flat plates and airfoils
(2021-11-25)
We investigate spanwise-coherent structures in the turbulent flow around airfoils, motivated by their connection with trailing-edge noise. We analyse well-resolved large-eddy simulations (LES) of the flow around NACA 0012 ...
Variability in obstacle clearance may (not) indicate cognitive disorders in alzheimer disease
(2014-10-06)
The aim of this study was to investigate obstacle clearance and its variability in individuals with Alzheimer dementia (AD) as well as healthy elderly individuals while they approached and crossed an obstacle in their path. ...