960 research outputs found
Classification of human motion based on affective state descriptors
Cataloged from PDF version of article.Human body movements and postures carry emotion-specific information. On the basis of this motivation, the objective of
this study is to analyze this information in the spatial and temporal structure of the motion capture data and extract features
that are indicative of certain emotions in terms of affective state descriptors. Our contribution comprises identifying the
directly or indirectly related descriptors to emotion classification in human motion and conducting a comprehensive analysis
of these descriptors (features) that fall into three different categories: posture descriptors, dynamic descriptors, and
frequency-based descriptors in order to measure their performance with respect to predicting the affective state of an input
motion. The classification results demonstrate that no single category is sufficient by itself; the best prediction performance
is achieved when all categories are combined. Copyright © 2013 John Wiley & Sons, Ltd
Photoluminescence and concentration quenching of Pr3+ doped BaTa2O6 phosphor
The pure and Pr3+ doped TTB-BaTa2O6 phosphors were obtained by the solid state reaction method at 1 425 °C for 20hours. X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM) analyses confirmed a single phase of BaTa2O6up to 10 mol % Pr2O36. SEM analysis also shows that BaTa2O6 grain size decreased with the increasing Pr2O36 concentration.The chemical composition of Pr3+ doped BaTa2O6 structures was confirmed by Energy Dispersive Spectroscopy(EDS) analysis. BaTa2O6:Pr3+ phosphors exhibited on a strong red emission at 620,9 nm, a green emission at 548,3 nm and a red emission at 655,2 nm. Emission intensity increased with Pr3+ doping concentration up to 1,5 mol %, then decreased due to concentration quenching
Roughness Induced Rotational Slowdown Near the Colloidal Glass Transition
Roughening the surface of spherical colloids can drastically change their
translational and rotational dynamics in dense suspensions. Using 3D confocal
microscopy, we show that roughness not only lowers the concentration of the
translational colloidal glass transition, but also generates a broad
concentration range in which the rotational Brownian motion changes signature
from high-amplitude diffusive to low-amplitude rattling. This hitherto not
reported second glass transition for rough spherical colloids emerges when the
particle intersurface distance becomes comparable to the roughness length
scale. Interlocking contacts are responsible for restricting the particle
rotations
Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions
Real time visualization and tracking of colloidal particles with 3D
resolution is essential for probing the local structure and dynamics in complex
fluids. Although tracking translational motion of spherical colloids is
well-known, accessing rotational dynamics of such particles remains a great
challenge. Here, we report a novel approach of using fluorescently labeled
raspberry-like colloids with an optical anisotropy to concurrently track
translational and rotational dynamics in 3 dimensions. The raspberry-like
particles are coated by a silica layer of adjustable thickness, which allows
tuning the surface roughness. The synthesis and applicability of the proposed
method is demonstrated by two types of probes: rough and smoothened. The
accuracy of measuring Mean Squared (Angular) Displacements are also
demonstrated by using these 2 probes dispersed in 2 different solvents. The
presented 3D trackable colloids offer a high potential for wide range of
applications and studies, such as probing crystallization dynamics, phase
transitions and the effect of surface roughness on diffusion
CHILDREN’S EMOTION REGULATION AND ATTACHMENT TO PARENTS: PARENTAL EMOTION SOCIALIZATION AS MODERATOR
We examined the associations among parental emotion socialization, and children’s emotion regulation and attachment to parents. In particular, we examined the moderating role of parental emotion socialization in the relationship between children’s emotion regulation and attachment to parents. Participants were 78 Turkish children (49 boys) aged from 60 to 77 months and their parents. Parents reported on the socialization strategies they used for their children’s emotions and on their children’s emotion regulation, and we assessed children’s attachment to parents via the Doll Story Completion Task. Results revealed that parents’ minimization reaction to children’s emotions moderated the association between children’s emotion regulation and attachment to parents. When parents’ response was punitive, children with poor emotion regulation displayed stronger attachment to parents than children with robust emotion regulation. In addition, girls had a more secure attachment than boys to parents. Our results highlight the importance of children’s emotion regulation and parental emotion socialization for children’s secure early attachment to parents
CHILDREN’S EMOTION REGULATION AND ATTACHMENT TO PARENTS: PARENTAL EMOTION SOCIALIZATION AS MODERATOR
We examined the associations among parental emotion socialization, and children’s emotion regulation and attachment to parents. In particular, we examined the moderating role of parental emotion socialization in the relationship between children’s emotion regulation and attachment to parents. Participants were 78 Turkish children (49 boys) aged from 60 to 77 months and their parents. Parents reported on the socialization strategies they used for their children’s emotions and on their children’s emotion regulation, and we assessed children’s attachment to parents via the Doll Story Completion Task. Results revealed that parents’ minimization reaction to children’s emotions moderated the association between children’s emotion regulation and attachment to parents. When parents’ response was punitive, children with poor emotion regulation displayed stronger attachment to parents than children with robust emotion regulation. In addition, girls had a more secure attachment than boys to parents. Our results highlight the importance of children’s emotion regulation and parental emotion socialization for children’s secure early attachment to parents
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