3 edition of Spatial variability and impact force in aiming movements found in the catalog.
Spatial variability and impact force in aiming movements
Written in English
|Statement||by Charles Jerome Worringham.|
|The Physical Object|
|Pagination||ix, 150 leaves|
|Number of Pages||150|
The discrete and reciprocal versions of both paradigms have proven highly valuable in demonstrating speed-accuracy trade-offs in aiming movements, revealing that, for a given movement amplitude, shorter MTs are associated with larger absolute spatial variability,,. However, due to the focus on spatial aspects of the task, temporal variability has typically not been an object of interest in these by: 4. In a stationary target acquisition task, both year-old and year-old adults exhibited a negatively accelerated curvilinear relationship between the spatial variability of submovement endpoints and average submovement velocity. For high velocities, the variability was greater for the older adults. This elevated motor noise is considered a primary cause of their slower by:
1) Variability in the duration of a group of muscular contractions is directly proportional to the mean duration. 2) Variability in force applied in a group of attempts is an increasing function of the mean force up to 65% of the maximum, while leveling off/slight decrease thereafter. Size‐dependent movement explains why bigger is better in fragmented landscapes. Jasmijn Hillaert. Corresponding Author. the coupling of size and movement has the largest impact on O Moreover, we highlight an important interaction effect between isolation and resource growth on local and spatial by: 6.
INTRODUCTION. Beginning with the seminal work of Woodworth over years ago researchers in human motor control have been interested in the factors that affect the spatial accuracy of rapid aiming if a simple movement like reaching for a glass is made too quickly, spatial errors may result in spilled by: 3. Optical Sensors Applied in Agricultural Crops. By Fabrício Pinheiro Povh and Wagner de Paula Gusmão dos Anjos Many procedures may be used to characterize and treat spatial variability on yield aiming profit for the farmers, but a wide and safe vision about the impact of the variability in a production system requires an accurate Cited by: 6.
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Get this from a library. Spatial variability and impact force in aiming movements. [Charles Jerome Worringham]. Likewise, relevant Impact Assessment methods, although gradually becoming more spatial, assume their context as invariable. As a consequence, impact significance so far is also a spatially.
poral and spatial variability of the movements, we aimed to verify whether an increased noise-to-force ratio may be responsible for these movement adaptations in sedentary older by: porting the first.
In aiming movements (Schmidt et al,), errors scored in a dimension perpendicular to the move-ment directly increased as the velocity of the movement increased.
Second, evidence from two-handed aiming movements suggests that overshoots and undershoots (thought to be due to variability in forces involved in the.
Evidence for invariant relative timing is mostly based on comparisons between experimental conditions which differ in the average speed of the movements under study. The present experiment examines whether spontaneous variability of acceleration-time curves of aiming movements within a single experimental condition can also be described in terms of variable scaling Cited by: First, despite the richness of the human motor repertoire, the study of variability in voluntary movement has mainly dealt with rapid single-aiming movements, such as the production of spatially oriented movements with the arm, or the production of isometric force pulses.
Less attention has been paid to characterizing variability in voluntary cyclical movements, especially in the context of whole-body by: 5. Discussion Impact force and impact impulse varied systematically as a function of target size and movement time.
That is, the smaller the targets, the slower the movements and the smaller the amount of impact at target by: 4. The extant speed-accuracy studies collectively point to the proposition that the movement time is a significant determiner of spatial and temporal accuracy and variability and the prevalence of the different types of sub-movements in discrete aiming : Tsung-Yu Hsieh, Tsung-Yu Hsieh, Yeou-Teh Liu, Karl M.
Newell. a measure of the temporal structure of a movement, in which the ratios among the durations of various movement features are used to define the temporal pattern. surface features. the easily changeable components of a movement usch as movement time or amplitude, that are modified as a result of changing parameters.
With very rapid and very slow movements having the most spatial accuracy and the moderate-speed movements having the least accuracy (example). Rational The nearly maximal movements are operating in a range where the forces are becoming more consistent with increases in force.
• Movement Timing Accuracy: Batter selects a MT, the initiates this action at such a time that the middle of the movement coincides with the arrival of the ball at the plate. • Movement Spatial Accuracy: reducing the MT when it is already quite short results in improving spatial accuracy, giving more frequent ball contact.
In reciprocal aiming tasks, moreover, Danion et al. () found that this inverse relation in movement outcome variability was not present in the spatial and temporal variability of the sep- arate acceleration and deceleration sub-phases of the movements. Spatial variability.
The variability in the distance travelled at various kinematic markers and at the end of the movement were analysed by performing a two visual conditions × four criterion MTs × four kinematic markers repeated measures ANOVA.
This analysis revealed significant main effects for visual condition, F(1,23)=, pCited by: This paper considers evidence that there exists a general property of trajectory formation which is a consequence of the inherent variability of movements.
Specifically, the amplitude of the initial sub-movement of motions containing two or more such sub-movements is planned so as to take into account its spatial by: 3. Spatial variability. As shown in Fig. 4, the omnibus analysis of spatial variability revealed significant main effects for block (F (3,66) =p variability significantly increased as the movement Cited by: 5.
Figure 12 indicates the locations of the CPTs, which have been used to evaluate the trends in the corrected cone tip resistance (q t) and (, h, z) spatial variability of silty fines in. Introduction. Variability is inherent within all biological systems.
In the particular case of human motor abilities, the fact that it seems impossible for a given individual to generate identical movements patterns on successive attempts is a strong testament to this al and spatial intrasubject variability in kinematic variables is typically regarded as an important Cited by: muscular force, they compensate for this initial variability during limb decelera-tion.
Perhaps persons with autism have learned to keep initial impulses low to minimize the spatial variability that needs to be corrected for during the online control phase of the movement.
Key Words: autism spectrum disorder, movement control, motor, manual aiming. Goal-directed aiming movements are planned and executed so that they optimize speed, accuracy and energy expenditure.
In particular, the primary submovements involved in manual aiming attempts typically undershoot targets in order to avoid costly time and energy overshoot errors. Furthermore, in aiming movements performed over a series of trials, the movement planning Cited by: Numerical Methods in Geotechnical Engineering contains scientific papers presented at the 7th European Conference on Numerical Methods in Geotechnical Engineering, NUMGEheld at Norwegian University of Science and Technology (NTNU) in Trondheim, Norway, 2 4 June The contributions cover topics from emerging research to engineering praReviews: 1.
a measure of the temporal structure of a movement, in which the rations among the duration of various movement features are used to define the temporal pattern. surface features. the easily changeable components of a movement, such as movement time or amplitude, that are modified as a result of changing parameter.
Spatial and temporal variability of rainfall and their effects on hydrological response in urban areas -– a Available via license: CC BY Content may be subject to copyright.works Search for books with subject Sensorimotor integration.
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