Fatigue Impact to Mechanical Movement and Ball Velocity Pitcher Baseball

Tujuan penelitian ini adalah ingin mengetahui perbedaan long drive swing mechanical movement terhadap ball velocity berbasis pendekatan kinematics analysis antara skill dan unskill golf player. Adapun Analisis kinematik terdiri dari: trunk forword tilt, club stick velocity, knee flexion, wrist hinge at the top, leading arm angle, lateral band, hip rotation dan shoulder rotation. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kuantitatif, sedangkan teknik analisis data menggunakan analisis uji perbedaan rata-rata. Sampel dalam penelitian ini adalah 2 atlet professional dan 4 atlet amatir di lingkungan Universitas Pendidikan Indonesia UPI Bandung, dengan rata-rata Tinggi Badan 1.63 ± 2.4 m, Berat Badan 72.4 ± 3.6 kg dan Usia 37.4 ± 7.6 tahun. Hasil penelitian ini menunjukan bahwa dari sepuluh variabel kinematika yang dianalisis terdapat empat indikator yang menunjukan hasil perbedaan signfikan pada taraf alpha 0.05 antara lain club speed at impact (t =0.007), lateral band after impact ball (t = 0.006), shoulder rotation (t = 0.005) dan flexion at elbow joint arm non dominant (t = 0.003).

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Mathematical myocardium elasticity properties modeling in echocardiography study of diastolic and systolic function of the left ventricle (Preprint)

10.2196/preprints.20459 ◽

2020 ◽

Author(s):

Lucian Popescu ◽

Nelu-Mihai Trofenciuc ◽

Simina Crisan ◽

Aurora Diana Bordejevic ◽

Alexandru Mischie ◽

...

Keyword(s):

Left Ventricle ◽

Cardiac Cycle ◽

Systolic Function ◽

Study Group ◽

Mathematical Approach ◽

Energetic Approach ◽

Elasticity Property ◽

Property Modeling ◽

Coefficient Of Elasticity ◽

Mechanical Movement

BACKGROUND A systematic and quantitative comparative analysis for this subject has not been done so far. Thus defined, the coefficient of elasticity is a whole new dimension. OBJECTIVE This study proposes a new mathematical myocardium elasticity property modeling in characterizing of the ventricular diastole and systole. METHODS The study group consisted of 2283 consecutive patients evaluated by echocardiography. The mathematical approach is made starting from energetic consideration, by applying the energy conservation low for the blood entering from left atrium into left ventricle during diastole period. RESULTS Analyzing all the data obtained we developed two brand new coefficients to describe the cardiac cycle and we had verified if the coefficients are correlated with classically used parameters. We consider that the energetic approach take into consideration the whole mechanical movement that is happening inside the heart and can offer a very synthetic and scientific solid view about the cardiac cycle. CONCLUSIONS The new coefficients are simply to be calculated and as you will see from our research the correlation with other classically used parameters is obvious. The direct physical approach of blood flow within the heart can generate new, beneficial perspectives in diagnosing various heart conditions, or even in understanding how works the filling of the ventricles and atria during a heartbeat.

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Shaking Lithium‐Ion Cells on a Rocker – Temperature‐Dependent Influence of Mechanical Movement on Lithium‐Ion Battery Lifetime

Chemie Ingenieur Technik ◽

10.1002/cite.201800218 ◽

2021 ◽

Author(s):

Elisabeth Maria Boerger ◽

Felix Gottschalk ◽

Laura Drescher ◽

Alexander Boerger

Keyword(s):

Lithium Ion Battery ◽

Lithium Ion ◽

Temperature Dependent ◽

Battery Lifetime ◽

Lithium Ion Cells ◽

Mechanical Movement

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Concurrent validity, inter-unit reliability and biological variability of a low-cost pocket radar for ball velocity measurement in soccer and tennis

Journal of Sports Sciences ◽

10.1080/02640414.2020.1868090 ◽

2020 ◽

pp. 1-8

Author(s):

Alejandro Hernández-Belmonte ◽

Alejandro Sánchez-Pay

Keyword(s):

Velocity Measurement ◽

Concurrent Validity ◽

Low Cost ◽

Biological Variability ◽

Ball Velocity

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Stable Extended Imaging Area Sensing Without Mechanical Movement Based on Spatial Frequency Multiplexing

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2018.2803721 ◽

2018 ◽

Vol 65 (10) ◽

pp. 8195-8203 ◽

Cited By ~ 11

Author(s):

Behnam Tayebi ◽

Farnaz Sharif ◽

Ali Karimi ◽

Jae-Ho Han

Keyword(s):

Spatial Frequency ◽

Frequency Multiplexing ◽

Mechanical Movement

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How Position, Velocity, and Temporal Information Combine in the Prospective Control of Catching: Data and Model

Journal of Cognitive Neuroscience ◽

10.1162/0898929053467604 ◽

2005 ◽

Vol 17 (4) ◽

pp. 668-686 ◽

Cited By ~ 36

Author(s):

Joost C. Dessing ◽

C. (Lieke) E. Peper ◽

Daniel Bullock ◽

Peter J. Beek

Keyword(s):

Neural Control ◽

Neural Model ◽

Temporal Information ◽

Behavioral Experiment ◽

Position Information ◽

Prospective Control ◽

Ball Velocity ◽

Velocity Information ◽

Centered Ball ◽

Information Streams

The cerebral cortex contains circuitry for continuously computing properties of the environment and one's body, as well as relations among those properties. The success of complex perceptuomotor performances requires integrated, simultaneous use of such relational information. Ball catching is a good example as it involves reaching and grasping of visually pursued objects that move relative to the catcher. Although integrated neural control of catching has received sparse attention in the neuroscience literature, behavioral observations have led to the identification of control principles that may be embodied in the involved neural circuits. Here, we report a catching experiment that refines those principles via a novel manipulation. Visual field motion was used to perturb velocity information about balls traveling on various trajectories relative to a seated catcher, with various initial hand positions. The experiment produced evidence for a continuous, prospective catching strategy, in which hand movements are planned based on gaze-centered ball velocity and ball position information. Such a strategy was implemented in a new neural model, which suggests how position, velocity, and temporal information streams combine to shape catching movements. The model accurately reproduces the main and interaction effects found in the behavioral experiment and provides an interpretation of recently observed target motion-related activity in the motor cortex during interceptive reaching by monkeys. It functionally interprets a broad range of neurobiological and behavioral data, and thus contributes to a unified theory of the neural control of reaching to stationary and moving targets.

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Optimized PID Position Control of a Nonlinear System Based on Correlating the Velocity with Position Error

Mathematical Problems in Engineering ◽

10.1155/2015/796057 ◽

2015 ◽

Vol 2015 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Nenad Muškinja ◽

Matej Rižnar

Keyword(s):

Pid Controller ◽

Position Control ◽

Design Approach ◽

Control Loop ◽

Real Time Control ◽

Laboratory Setup ◽

Time Control ◽

Beam System ◽

Ball Velocity ◽

Ball And Beam System

We examined a design approach for a PID controller for a nonlinear ball and beam system. Main objective of our research was to establish a nonmodel based control system, which would also not be dependent on a specific ball and beam hardware setup. The proposed PID controller setup is based on a cascaded configuration of an inner PID ball velocity control loop and an outer proportional ball position control loop. The effectiveness of the proposed controller setup was first presented in simulation environment in comparison to a hardware dependent PD cascaded controller, along with a more comprehensive study on possible design approach for optimal PID controller parameters in relation to main functionality of the controller setup. Experimental real time control results were then obtained on a laboratory setup of the ball and beam system on which PD cascaded controller could not be applied without parallel system model processing.

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APPLICATION OF EDUCATIONAL ROBOTICS IN THE PEDAGOGICAL PROCESS

BULLETIN Series of Pedagogical Sciences ◽

10.51889/2021-2.1728-5496.12 ◽

2021 ◽

Vol 72 (2) ◽

pp. 96-102

Author(s):

K.T. Ybyraimzhanov ◽

◽

E.S. Andasbayev ◽

М.А. Auyelbek ◽

◽

...

Keyword(s):

Computer Science ◽

Science Teachers ◽

Wave Theory ◽

Educational Robotics ◽

Educational Context ◽

Sound Waves ◽

Electronic Components ◽

Science Classes ◽

Mechanical Movement ◽

Robotics In Education

Educational robotics and its trends determine the innovative and creative educational context. This article discusses the current issues of rethinking educational robotics. Attention is focused on the potential for expanding the capabilities of educational robotics and the pedagogical capacity building of intelligent technologies in this area. Examples of the introduction of robotics in education, namely in physics and computer science classes, based on the Lego Education and Arduino are considered. Specific topics for the physics teachers are presented in the following section:" Mechanical movement "based on Lego;" Sound and sound waves. Speed wave", "Theory of electrical circuits" based on electronic components. For computer science teachers-programming on the Arduino IDE and drawing diagrams based on the Sprint Layout 6.0 program are offered. At the same time, the article can be a prototype for the application of educational robotics in other disciplines and the implementation of interdisciplinary connections.

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