The relationship between monkey dentate cerebellar nucleus activity and kinematic parameters of wrist movement

1998 ◽  
Vol 119 (2) ◽  
pp. 179-190 ◽  
Author(s):  
T. D. Aumann ◽  
J. A. Rawson ◽  
M. K. Horne
Keyword(s):  
Cerebellar Nucleus ◽  
Kinematic Parameters ◽  
Wrist Movement ◽  
The Relationship

The relationship between monkey ventrolateral thalamic nucleus activity and kinematic parameters of wrist movement

1996 ◽  
Vol 736 (1-2) ◽  
pp. 146-159 ◽  
Author(s):  
E.G. Butler ◽  
D.I. Finkelstein ◽  
M.C. Harvey ◽  
P.R. Churchward ◽  
L.M. Forlano ◽  
...  
Keyword(s):  
Thalamic Nucleus ◽  
Kinematic Parameters ◽  
Wrist Movement ◽  
The Relationship ◽  
Ventrolateral Thalamic Nucleus

scholarly journals KINEMATIC PARAMETERS OF JUMP SHOT IN ELITE MALE BASKETBALL PLAYERS

2019 ◽  
pp. 237
Author(s):  
Emilija Stojanović ◽  
Marko Radenković ◽  
Saša Bubanj ◽  
Ratko Stanković
Keyword(s):  
Body Height ◽  
The Body ◽  
Release Time ◽  
Kinematic Parameters ◽  
Basketball Players ◽  
The Relationship ◽  
Lower Angle

The primary aim of this study was to determine kinematic parameters of jump shot in elite male basketball players, by analyzing the release time for shooting, the angle of entry, and ball spin and. The secondary aim of this study was to examine possible differences in these kinematic parameters among the players associated with their playing position. Eighteen male basketball players (7 guards, 8 forwards, 3 centers) from six Serbian senior teams were tested. 94Fifty basketball sensor was used to obtain the following kinematic parameters of jump shot). The highest average measured values of shot release time were found in centres (1.23±0.23 s) and the lowest in guards (1.07±0.28 s), although these differences were not statistically significant. Further, centres had a lower angle of entry (36.6±2.08°) than guards (40.54±4.76°) and forwards (42.05±3.77°). The highest value of backspin was obtained by forwards (130±11.91 rotations / min). There were no significant differences between guards, forwards and centers in any kinematic variables (p>.01). The relationship between the body height and angle of entry was not significant (p>0.05). In conclusion, compared to centers, guards and forwards showed similar results for the examined variables. This evidence seems to support the theory that compared to guards and forwards centres have the weaker shooting techniques. Coaches should encourage all players, especially centers, to shoot from all positions.

scholarly journals Recovering λR and V/σ from seeing-dominated IFS data

2020 ◽  
Vol 497 (2) ◽  
pp. 2018-2038
Author(s):  
K E Harborne ◽  
J van de Sande ◽  
L Cortese ◽  
C Power ◽  
A S G Robotham ◽  
...  
Keyword(s):  
Aperture Size ◽  
Kinematic Parameters ◽  
Hydrodynamic Models ◽  
Rotating Systems ◽  
Galaxy Kinematics ◽  
A Minor ◽  
Empirical Corrections ◽  
The Relationship ◽  
Integral Field ◽  
Stellar Kinematic

ABSTRACT Observers experience a series of limitations when measuring galaxy kinematics, such as variable seeing conditions and aperture size. These effects can be reduced using empirical corrections, but these equations are usually applicable within a restrictive set of boundary conditions (e.g. Sérsic indices within a given range) that can lead to biases when trying to compare measurements made across a full kinematic survey. In this work, we present new corrections for two widely used kinematic parameters, λR and V/σ, that are applicable across a broad range of galaxy shapes, measurement radii, and ellipticities. We take a series of mock observations of N-body galaxy models and use these to quantify the relationship between the observed kinematic parameters, structural properties, and different seeing conditions. Derived corrections are then tested using the full catalogue of galaxies, including hydrodynamic models from the eagle simulation. Our correction is most effective for regularly rotating systems, yet the kinematic parameters of all galaxies – fast, slow, and irregularly rotating systems – are recovered successfully. We find that λR is more easily corrected than V/σ, with relative deviations of 0.02 and 0.06 dex, respectively. The relationship between λR and V/σ, as described by the parameter κ, also has a minor dependence on seeing conditions. These corrections will be particularly useful for stellar kinematic measurements in current and future integral field spectroscopic surveys of galaxies.

scholarly journals Body Composition and Kinematic Analysis of the Grab Start in Youth Swimmers

2014 ◽  
Vol 42 (1) ◽  
pp. 15-26 ◽  
Author(s):  
Ahmet Alptekin
Keyword(s):  
Body Composition ◽  
Vertical Velocity ◽  
Center Of Mass ◽  
Random Order ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Kinematic Parameters ◽  
Total Distance ◽  
Block Time ◽  
The Relationship

Abstract The purposes of this study were to compare the kinematic variables in youth swimmers during the grab start between sexes and to investigate the relationship between body composition and kinematic variables of the participants. Six female (Mage = 13.71 ± 0.49 yrs) and seven male (Mage = 14.00 ± 1.07 yrs) swimmers participated in this study. All participants were required to perform grab start tests in random order (three trials by each participant), while the best attempt was analyzed. Nineteen kinematic parameters consisting of block time, flight time, flight distance, total time, total distance, horizontal and vertical displacement of the center of mass (CM) at take-off, horizontal and vertical displacement of the CM at entry, height of take-off and entry, relative height of take-off, horizontal and vertical velocity of the CM at take-off, horizontal and vertical velocity of the CM at entry, angle of take-off, angle of entry and angle of knee at block were analyzed. Out of the 19 evaluated kinematic parameters, a statistical difference between the female and male group was found only in the total distance. Therefore, both female and male groups are considered as only one group and merged after analyzing the results. Statistical analysis showed positive and negative correlations between horizontal / vertical velocity of CM at take-off and several kinematic variables (e.g. angle of entry (rhorizontal = -.868, p=.000 / rvertical = .591, p=.02), total distance (rhorizontal = .594, p=.02 / rvertical = .54, p=.04), and height of take-off (rvertical = .888, p=.000), respectively). On the other hand, positive and negative correlations were found between somatotype components and several kinematic variables (e.g. horizontal displacement of CM at entry (rendomorphy = -.626, p=.013), angle of entry (rmesomorphy = -.686, p=.005 / rectomorphy = .52, p=.047), total distance (rendomorphy = -.626, p=.012), and height of take-off (rendomorphy = -.633, p=.011 / rectomorphy = .515, p=.05)). In conclusion, results show that in order to be successful at grab start performance, a swimmer should target to get higher horizontal velocity of CM at take-off and optimize the angle of take-off so this movement form supplies more total distance to the swimmer. Coaches should consider improving start performance and adding start training to regular training sessions. Moreover, youth male and female swimmers can participate together in the grab start training

scholarly journals A cross-sectional study about the relationship between morphology and kinematic parameters in children between 15 and 36 months

2011 ◽  
Vol 34 (2) ◽  
pp. 159-163 ◽  
Author(s):  
M. Van Dam ◽  
A. Hallemans ◽  
S. Truijen ◽  
V. Segers ◽  
P. Aerts
Keyword(s):  
Cross Sectional Study ◽  
Sectional Study ◽  
Kinematic Parameters ◽  
Cross Sectional ◽  
The Relationship

The effect of oleanolic acid on sperm motion characteristics and fertility of male Wistar rats

2002 ◽  
Vol 36 (4) ◽  
pp. 432-437 ◽  
Author(s):  
M. C. Mdhluli ◽  
G. van der Horst
Keyword(s):  
Oleanolic Acid ◽  
Sperm Motility ◽  
Wistar Rats ◽  
Kinematic Parameters ◽  
Sperm Analysis ◽  
Male Wistar Rats ◽  
Motion Characteristics ◽  
Analysis System ◽  
The Relationship ◽  
Sperm Motion

The study was designed to examine the effect of oleanolic acid on cauda epididymal sperm motion using a computer-aided sperm analysis system and to elucidate the relationship between sperm motion and fertility, as a tool for contraceptive studies. Oleanolic acid-polyvinylpyrrollidone suspension was orally administered to adult male Wistar rats for 30 days, followed by a 14-day drug withdrawal from half of the rats in the group. Control rats received only polyvinylpyrrollidone. All males were mated with untreated females. Treated males failed to impregnate females, whereas control and oleanolic acid withdrawn males achieved 100% pregnancies. Sperm motion analysed on the Sperm Motility Quantifier (SMQ) showed significant differences in linearity ( P < 0.001) and wobble ( P < 0.01) between control and treated groups. However, the curvilinear velocities were not significantly different ( P > 0.05) among all the groups. Sperm motility patterns verified differences among kinematic parameters.

The Relationship between Age and Selected Kinematic Parameters of Standing Long Jump Test

2016 ◽  
Vol 24 (1) ◽  
pp. 237-242
Author(s):  
Marijana Hraski ◽  
Željko Hraski ◽  
Marija Lorger
Keyword(s):  
Kinematic Parameters ◽  
Jump Test ◽  
Standing Long Jump ◽  
Long Jump ◽  
The Relationship

scholarly journals Rotace horní části těla při golfovém švihu u elitních hráčů

2013 ◽  
Vol 7 (1) ◽  
pp. 35-42
Author(s):  
Tomáš Gryc ◽  
František Zahálka ◽  
Tomáš Malý
Keyword(s):  
Upper Body ◽  
Body Segment ◽  
Kinematic Parameters ◽  
Segment Model ◽  
Motion System ◽  
Ball Contact ◽  
Club Head ◽  
The Relationship ◽  
Hip Rotation ◽  
Contact Parameters

When the golf swing is involving all body segments and is thus considered as one of the most complex of sports motions. The aim of this study was to determine the selected kinematic parameters of movement of pelvic and segments of the upper body (shoulder rotation, hip rotation, X-Factor, stretch X-Factor) that affect the club head speed at ball contact in elite golfers. To build the upper body segment model were used spots and their position during the measurement was scanned by 3D kinematic analyzer CODA Motion System. To determine the interindividual stability of performance the coefficient of variation was used and for statistical analysis of the relationship between kinematic and temporal parameters and the club head speed at ball contact the Pearson's correlation coefficient was used. We found a high interindividual stability in maximized shoulders rotation and club head speed at ball contact parameters. When analyzing relationship between the club head speed at ball contact and the observed kinematic parameters of the movement of the upper body only a high relationship with the stretch X-factor parameter was found.

scholarly journals The dynamics of a laden skip of the shaft pneumatic winding plant during acceleration

2021 ◽  
pp. 115-121
Author(s):  
Aleksandr Leontiev ◽  
◽  
Vitalii Tauger ◽  
Evgenii Volkov ◽  
Volkov Volkov ◽  
...  
Keyword(s):  
Power Unit ◽  
Aerodynamic Characteristic ◽  
Research Result ◽  
Aerodynamic Characteristics ◽  
Unsteady Motion ◽  
Kinematic Parameters ◽  
Working Cycle ◽  
Discharge Unit ◽  
Acceleration Period ◽  
The Relationship

Introduction. Ratios for calculating the laden skip acceleration and speed at the motion start are required to calculate skip pneumatic winding plant cycle components. The ratios are the solution to the skip dynamics equation which takes into account the relationship between the flow generated by a power unit and air pressure. Research methodology. The dynamics equation including the dependence of the pressure on the flow rate (aerodynamic characteristic) in a general form is compiled. In a special case of the unit’s physical model, a discharge unit with a linear aerodynamic characteristic is used. Research result. For a particular case, equations are obtained that allow to theoretically describe the kinematic parameters of a skip in the period of unsteady motion. It is established that the skip acceleration, velocity and displacement are asymptotic functions. The obtained expressions for kinematic parameters make it possible to theoretically determine the duration of the acceleration period and the path that the ISSN 0536-1028 «Известия вузов. Горный журнал», № 1, 2021 121 skip takes during this period. A method for calculating skip dynamics during acceleration is proposed, which contains approximating formula conclusion for the power unit aerodynamic characteristics, its substitution into the dynamics equation, and obtaining skip kinematic parameters by solving the dynamics equation. Conclusion. The obtained relations allow to calculate skip dynamics during acceleration taking into account power unit aerodynamic characteristics, which is necessary to determine the working cycle time of the pneumatic winding plant.

scholarly journals The relationship between chosen kinematic parameters of the aerial cartwheel on the balance beam during skill learning

2019 ◽  
Vol 11 (1) ◽  
pp. 18-23
Author(s):  
Aleksandra Aleksić-Veljković ◽  
Kamenka Živčić Marković ◽  
Lucija Milčić
Keyword(s):  
Skill Learning ◽  
Kinematic Parameters ◽  
Balance Beam ◽  
The Relationship
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