Selection of spatial frame of reference and postural control variability

1997 ◽  
Vol 114 (3) ◽  
pp. 584-589 ◽  
Author(s):  
B. Isableu ◽  
Théophile Ohlmann ◽  
Jacques Crémieux ◽  
Bernard Amblard
Keyword(s):  
Postural Control ◽  
Frame Of Reference ◽  
Spatial Frame ◽  
Selection Of

scholarly journals Acting Rehearsal in Collaborative Multimodal Mixed Reality Environments

2012 ◽  
Vol 21 (4) ◽  
pp. 406-422 ◽  
Author(s):  
William Steptoe ◽  
Jean-Marie Normand ◽  
Oyewole Oyekoya ◽  
Fabrizio Pece ◽  
Elias Giannopoulos ◽  
...  
Keyword(s):  
Facial Expression ◽  
System Architecture ◽  
Heterogeneous System ◽  
Mixed Reality ◽  
Frame Of Reference ◽  
Telecommunication System ◽  
Spatial Frame ◽  
The Common ◽  
Successes And Failures

This paper presents the use of our multimodal mixed reality telecommunication system to support remote acting rehearsal. The rehearsals involved two actors, located in London and Barcelona, and a director in another location in London. This triadic audiovisual telecommunication was performed in a spatial and multimodal collaborative mixed reality environment based on the “destination-visitor” paradigm, which we define and put into use. We detail our heterogeneous system architecture, which spans the three distributed and technologically asymmetric sites, and features a range of capture, display, and transmission technologies. The actors' and director's experience of rehearsing a scene via the system are then discussed, exploring successes and failures of this heterogeneous form of telecollaboration. Overall, the common spatial frame of reference presented by the system to all parties was highly conducive to theatrical acting and directing, allowing blocking, gross gesture, and unambiguous instruction to be issued. The relative inexpressivity of the actors' embodiments was identified as the central limitation of the telecommunication, meaning that moments relying on performing and reacting to consequential facial expression and subtle gesture were less successful.

An early formulation by Stokes of the theories of the rotatory polarizations of light

1924 ◽  
Vol 22 (1) ◽  
pp. 76-81 ◽  
Author(s):  
Joseph Larmor
Keyword(s):  
Magnetic Field ◽  
Frame Of Reference ◽  
Spatial Frame ◽  
Fixed Direction ◽  
Early Formulation ◽  
Magneto Optic

AbstractThe two letters now communicated are from G. G. Stokes to W. Thomson, of dates Dec. 12–13, 1848, three years after Faraday's great magneto-optic discovery. They formulated already the permissible types for general equations of propagation, virtually on the basis of the very modern criterion of covariance,—relative to all changes of the spatial frame of reference in the case of active fluids, but having regard to the fixed direction of the extraneous magnetic field in the Faraday case. Their form was elucidated in each case by correlation with a remarkable and significant type of rotational stress in a propagating medium.

scholarly journals The validation of physical activity instruments for measuring energy expenditure: problems and pitfalls

1998 ◽  
Vol 1 (4) ◽  
pp. 265-271 ◽  
Author(s):  
Kirsten L Rennie ◽  
Nicholas J Wareham
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Validation Study ◽  
Measurement Instrument ◽  
Frame Of Reference ◽  
Exposure Measurement ◽  
Planning Stage ◽  
Correlated Error ◽  
Comparison Technique ◽  
Selection Of

AbstractObjective:To review and categorize the problems associated with undertaking physical activity validation studies and to construct a checklist against which any study could be compared.Results:The studies reviewed demonstrated problems in defining the dimension of physical activity that is of interest and in the selection of an appropriate comparison technique. Ideally this should be closely related to the true exposure of interest and assess that exposure objectively and without correlated error from the study instrument in question. In many studies inappropriate comparison methods have been chosen which do not measure the true underlying exposure and which are likely to have correlated error. The choice of study populations, the frame of reference of the exposure measurement and the use of appropriate statistical methods are also problematic areas.Conclusions:There is no ideal measurement instrument or validation study design that is suitable for all situations. However, the checklist in this paper provides a means whereby the appropriateness of studies already undertaken or at the planning stage can be assessed.

A fronto-parietal system for computing the egocentric spatial frame of reference in humans

1999 ◽  
Vol 124 (3) ◽  
pp. 281-286 ◽  
Author(s):  
Giuseppe Vallar ◽  
Elie Lobel ◽  
Gaspare Galati ◽  
Alain Berthoz ◽  
Luigi Pizzamiglio ◽  
...  
Keyword(s):  
Frame Of Reference ◽  
Spatial Frame

Spatial Reference Frame but Neither Age nor Gender Predict Performance on a Water-Level Task in 8- to 11-Year-Old Children

Perception ◽  
2020 ◽  
Vol 49 (11) ◽  
pp. 1200-1212
Author(s):  
Erica M. Barhorst-Cates ◽  
Sarah H. Creem-Regehr ◽  
Jeanine K. Stefanucci ◽  
Jean Gardner ◽  
Trish Saccomano ◽  
...  
Keyword(s):  
Water Level ◽  
Reference Frame ◽  
Reference Frames ◽  
Spatial Perception ◽  
Frame Of Reference ◽  
Spatial Frame ◽  
Accurate Performance ◽  
Spatial Reference Frame ◽  
Familiar Environment ◽  
And Gender

Successful performance on the water-level task, a common measure of spatial perception, requires adopting an environmental, rather than object-centered, spatial frame of reference. Use of this strategy has not been systematically studied in prepubertal children, a developmental period during which individual differences in spatial abilities start to emerge. In this study, children aged 8 to 11 reported their age and gender, completed a paper-and-pencil water-level task, and drew a map of their neighborhood to assess spontaneous choice of spatial frame of reference. Results showed a surprising lack of age or gender difference in water-level performance, but a significant effect of spatial frame of reference. Although they made up only a small portion of the sample, children who drew allocentric maps had the highest water-level score, with very high accuracy. These results suggest that children who adopt environmental-based reference frames when depicting their familiar environment may also use environmental-based reference frame strategies to solve spatial perception tasks, thereby facilitating highly accurate performance.

scholarly journals Effect of neck muscles vibration on postural balance and spatial frame of reference: A systematic scoping review

2018 ◽  
Vol 61 ◽  
pp. e347-e348
Author(s):  
K. Jamal ◽  
S. Leplaideur ◽  
L. Chochina ◽  
A. Moulinet Raillon ◽  
I. Bonan
Keyword(s):  
Scoping Review ◽  
Postural Balance ◽  
Neck Muscles ◽  
Frame Of Reference ◽  
Spatial Frame

scholarly journals Age-Related Interference between the Selection of Input-Output Modality Mappings and Postural Control—a Pilot Study

2017 ◽  
Vol 8 ◽  
Author(s):  
Christine Stelzel ◽  
Gesche Schauenburg ◽  
Michael A. Rapp ◽  
Stephan Heinzel ◽  
Urs Granacher
Keyword(s):  
Pilot Study ◽  
Postural Control ◽  
Input Output ◽  
Age Related ◽  
Selection Of
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