Relevant bibliographies by topics / Jerk

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Jerk'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Jerk"

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Laczko, Jozsef, Slobodan Jaric, Jozsef Tihanyi, Vladimir M. Zatsiorsky, and Mark L. Latash. "Components of the End-Effector Jerk during Voluntary Arm Movements." Journal of Applied Biomechanics 16, no. 1 (February 2000): 14–25. http://dx.doi.org/10.1123/jab.16.1.14.

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Jerk (time derivative of acceleration) of the endpoint of a multi-joint kinematic chain can be represented as the sum of terms related to jerks, accelerations, and velocities in individual joints. We investigated the relative contribution of these terms during simulations of planar movement of a 3-segment kinematic chain and also during unconstrained movements at different velocities, over different amplitudes, and with different intentionally changed curvature. Our results demonstrate that the term related to individual joint jerks dominates in the total endpoint jerk. This domination was particularly strong during voluntary movements and was not as striking during the simulations based on 5th-order polynomial functions for individual joint trajectories. Thus, the minimum-jerk criterion for multi-joint movements can be well approximated by minimization of the jerk-related terms for individual joints. The decomposition of endpoint jerk into its terms shows potential limitations of the commonly used 5th-order polynomial modeling for describing voluntary multi-joint movements.
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Wang, Z., S. Panahi, A. J. M. Khalaf, S. Jafari, and I. Hussain. "Synchronization of chaotic jerk systems." International Journal of Modern Physics B 34, no. 20 (August 5, 2020): 2050189. http://dx.doi.org/10.1142/s0217979220501891.

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Chaotic jerk oscillators belong to the simplest chaotic systems. These systems try to model the behavior of dynamical systems efficiently. Jerk oscillators can be known as the most general systems in science, especially physics. It has been proved that every dynamical system expressed with an ordinary differential equation is able to describe as a jerky system in particular conditions. One of its main topics is investigating the collective behavior of chaotic jerk oscillators in the dynamical network. In this paper, the synchronizability of the identical network of jerk oscillators is examined in three different coupling configurations, which are velocity, acceleration, and jerk coupling, and the results are compared with each other.
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Ahmad, Ejaz, and Iljoong Youn. "Performance Improvement during Attitude Motion of a Vehicle Using Aerodynamic-Surface-Based Anti-Jerk Predictive Controller." Sensors 23, no. 12 (June 19, 2023): 5714. http://dx.doi.org/10.3390/s23125714.

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This study presents the effectiveness of an anti-jerk predictive controller (AJPC) based on active aerodynamic surfaces to handle upcoming road maneuvers and enhance vehicle ride quality by mitigating external jerks operating on the body of the vehicle. In order to eliminate body jerk and improve ride comfort and road holding during turning, accelerating, or braking, the proposed control approach assists the vehicle in tracking the desired attitude position and achieving a realistic operation of the active aerodynamic surface. Vehicle speed and upcoming road data are used to calculate the desired attitude (roll or pitch) angles. The simulation results are performed for AJPC and predictive control strategies without jerk using MATLAB. The simulation results and comparison based on root-mean-square (rms) values show that compared to the predictive control strategy without jerk, the proposed control strategy significantly reduces the effects of vehicle body jerks transmitted to the passengers, improving ride comfort without degrading vehicle handling at the cost of slow desired angle tracking.
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Khanyile, S. L., and E. Nahayo. "Geomagnetic jerks observed in geomagnetic observatory data over southern Africa between 2017 and 2023." South African Journal of Geology 127, no. 1 (March 1, 2024): 131–36. http://dx.doi.org/10.25131/sajg.127.0019.

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Abstract Geomagnetic jerks are jumps observed in the second derivative of the main magnetic field that occur on annual to decadal timescales. Understanding these jerks is crucial as they provide valuable insights into the complex dynamics of the Earth’s outer liquid core. In this study, we investigate the occurrence of geomagnetic jerks in geomagnetic observatory data collected at southern African magnetic observatories, Hermanus (HER), Tsumeb (TSU), Hartebeesthoek (HBK) and Keetmanshoop (KMH) between 2017 and 2023. The observatory data was processed and analysed by retaining quiet night-time data recorded during quiet geomagnetic activities with the help of planetary K (Kp), Disturbance storm time (Dst) and ring current (RC) indices. Results confirm the occurrence of 2019 to 2020 geomagnetic jerk in the region, and identify the recent 2021 jerk detected with V-shaped secular variation changes in X and Z components at all four observatories. The highest estimated 2021 jerk secular acceleration amplitudes in X and Z components were found at HBK, 12.7 nT/year2 and 19.1 nT/year2, respectively. Notably, the global CHAOS-7 model aptly identifies this 2021 jerk in the Z component at all magnetic observatories in the region.
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Aghazadeh, Farzad, Bin Zheng, Mahdi Tavakoli, and Hossein Rouhani. "Motion Smoothness-Based Assessment of Surgical Expertise: The Importance of Selecting Proper Metrics." Sensors 23, no. 6 (March 15, 2023): 3146. http://dx.doi.org/10.3390/s23063146.

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The smooth movement of hand/surgical instruments is considered an indicator of skilled, coordinated surgical performance. Jerky surgical instrument movements or hand tremors can cause unwanted damages to the surgical site. Different methods have been used in previous studies for assessing motion smoothness, causing conflicting results regarding the comparison among surgical skill levels. We recruited four attending surgeons, five surgical residents, and nine novices. The participants conducted three simulated laparoscopic tasks, including peg transfer, bimanual peg transfer, and rubber band translocation. Tooltip motion smoothness was computed using the mean tooltip motion jerk, logarithmic dimensionless tooltip motion jerk, and 95% tooltip motion frequency (originally proposed in this study) to evaluate their capability of surgical skill level differentiation. The results revealed that logarithmic dimensionless motion jerk and 95% motion frequency were capable of distinguishing skill levels, indicated by smoother tooltip movements observed in high compared to low skill levels. Contrarily, mean motion jerk was not able to distinguish the skill levels. Additionally, 95% motion frequency was less affected by the measurement noise since it did not require the calculation of motion jerk, and 95% motion frequency and logarithmic dimensionless motion jerk yielded a better motion smoothness assessment outcome in distinguishing skill levels than mean motion jerk.
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Hirose, James, Atsushi Nishikawa, Yosuke Horiba, Shigeru Inui, and Todd C. Pataky. "Integrated jerk as an indicator of affinity for artificial agent kinematics: laptop and virtual reality experiments involving index finger motion during two-digit grasping." PeerJ 8 (September 15, 2020): e9843. http://dx.doi.org/10.7717/peerj.9843.

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Uncanny valley research has shown that human likeness is an important consideration when designing artificial agents. It has separately been shown that artificial agents exhibiting human-like kinematics can elicit positive perceptual responses. However the kinematic characteristics underlying that perception have not been elucidated. This paper proposes kinematic jerk amplitude as a candidate metric for kinematic human likeness, and aims to determine whether a perceptual optimum exists over a range of jerk values. We created minimum-jerk two-digit grasp kinematics in a prosthetic hand model, then added different amplitudes of temporally smooth noise to yield a variety of animations involving different total jerk levels, ranging from maximally smooth to highly jerky. Subjects indicated their perceptual affinity for these animations by simultaneously viewing two different animations side-by-side, first using a laptop, then separately within a virtual reality (VR) environment. Results suggest that (a) subjects generally preferred smoother kinematics, (b) subjects exhibited a small preference for rougher-than minimum jerk kinematics in the laptop experiment, and that (c) the preference for rougher-than minimum-jerk kinematics was amplified in the VR experiment. These results suggest that non-maximally smooth kinematics may be perceptually optimal in robots and other artificial agents.
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Plisk, Steven S. "Jerk." Strength and Conditioning Journal 24, no. 4 (August 2002): 35–37. http://dx.doi.org/10.1519/00126548-200208000-00011.

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Zhao, Jiangying, Yongbiao Hu, Chengshuo Liu, Mingrui Tian, and Xiaohua Xia. "Spline-Based Optimal Trajectory Generation for Autonomous Excavator." Machines 10, no. 7 (July 3, 2022): 538. http://dx.doi.org/10.3390/machines10070538.

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In this paper, we propose a novel trajectory generation method for autonomous excavator teach-and-plan applications. Rather than controlling the excavator to precisely follow the teaching path, the proposed method transforms the arbitrary slow and jerky trajectory of human excavation into a topologically equivalent path that is guaranteed to be fast, smooth and dynamically feasible. This method optimizes trajectories in both time and jerk aspects. A spline is used to connect these waypoints, which are topologically equivalent to the human teaching path. Then the trajectory is reparametrized to obtain the minimum time-jerk trajectory with the kinodynamic constraints. The optimal time-jerk trajectory generation method is both formulated using nonlinear programming and conducted iteratively. The framework proposed in this paper was integrated into a complete autonomous excavation platform and was validated to achieve aggressive excavation in a field environment.
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Gómez-Aguilar, J. F., J. Rosales-García, R. F. Escobar-Jiménez, M. G. López-López, V. M. Alvarado-Martínez, and V. H. Olivares-Peregrino. "On the Possibility of the Jerk Derivative in Electrical Circuits." Advances in Mathematical Physics 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/9740410.

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A subclass of dynamical systems with a time rate of change of acceleration are called Newtonian jerky dynamics. Some mechanical and acoustic systems can be interpreted as jerky dynamics. In this paper we show that the jerk dynamics are naturally obtained for electrical circuits using the fractional calculus approach with order γ. We consider fractional LC and RL electrical circuits with 1⩽γ<2 for different source terms. The LC circuit has a frequency ω dependent on the order of the fractional differential equation γ, since it is defined as ω(γ)=ω0γγ1-γ, where ω0 is the fundamental frequency. For γ=3/2, the system is described by a third-order differential equation with frequency ω~ω03/2, and assuming γ=2 the dynamics are described by a fourth differential equation for jerk dynamics with frequency ω~ω02.
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Seo, Ji Hwan, Seong Kyung Kwon, and Kyoung-Dae Kim. "A discrete-time linear model predictive control for motion planning of an autonomous vehicle with adaptive cruise control and obstacle overtaking." Advances in Mechanical Engineering 14, no. 8 (August 2022): 168781322211198. http://dx.doi.org/10.1177/16878132221119899.

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Motion planners for autonomous driving improve traffic safety through collision-free motion generation along the path. However, conventional motion planners render passengers uncomfortable as a result of jerky motion. To overcome this, we propose a model predictive control (MPC) based motion planner that not only ensures safety but also improves driving comfort. The proposed planner generates path tracking and collision-free maneuvers to ensure safety, and improve driving comfort by minimizing acceleration and jerk. Collision-free maneuvers include vehicle following and overtaking. The target speed is determined by comprehensively considering path tracking performance improvement and whether overtaking is possible. The speed of the vehicle is controlled by considering longitudinal acceleration and jerk minimization. The steering command is determined by considering both path tracking error reduction, and lateral acceleration and jerk minimization. In cases where vehicle overtaking is required and during high-speed driving conditions, the consideration of lateral acceleration and jerk minimization increases to improve driving comfort. The proposed planner is formulated as a convex optimization problem. The effectiveness of the proposed planner was evaluated in path tracking and collision avoidance simulations. The simulation results confirm that the proposed planner ensures vehicle safety through lane keeping and collision avoidance, and improves driving comfort.
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Dissertations / Theses on the topic "Jerk"

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Jasbinschek, dos Reis Pinheiro Katia. "Mantle electrical conductivity estimates from geomagnetic jerk observations /." Zürich : ETH, 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18259.

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Kinney, Justin P. "Jerk limited reference trajectory generation for motion control." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16024.

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Abuasaker, Sufyan. "Anti-jerk controller with optimisation-based self-tuning." Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/810442/.

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One of the major phenomena compromising the comfort of the passenger vehicles is jerk. Jerk occurs as a response to the transient in the driver torque demand. The transient provokes torsional oscillation of the drivetrain, which results in oscillations and jerk of the vehicle. These oscillations and jerk are transmitted to the driver and can cause discomfort to the driver and thus affecting the drivability of the vehicle. The aim of this work is to develop an anti-jerk controller to achieve smooth response of the vehicle and enhance the drivability metrics. The drivability analysis in this thesis focused on the longitudinal dynamic response during the tip-in manoeuvre. The anti-jerk controller introduced in this work is an optimisation-based controller. It is developed by using two models, i.e. a linear model and non-linear model. The developed models include detailed description of the drivetrain system such as clutch, primary shaft, secondary shaft, differential, half-shaft, tyres and the vehicle. The engine was modelled using the engine map. To achieve high confidence of the models fidelity, the models were verified by experimental data which ensures that the models are accurate and characterised by the required details. The anti-jerk controller is an optimised controller and uses a gain scheduling where the gain scheduling optimisation was performed off-line to reduce the engineering time in the controller gain tuning. The simulation results of the models with the controller show a significant improvement of the drivability, which is measured by the overshoot and the rise time on the acceleration profile.
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Lang, H. M., R. Lund, T. K. Ficklin, and Caleb D. Bazyler. "The Effect of Two Jerk Techniques on Barbell Kinematics." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/3829.

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The split jerk and power jerk are two commonly used lifts among strength and conditioning coaches, as well as lifts included in the sport of Olympic weightlifting. However, it is unknown which of these jerk techniques exhibit more advantageous barbell kinematics. PURPOSE: To compare the barbell kinematics between a power jerk and a split jerk at a constant load. METHODS: Twelve men were recruited for this study (height = 1.8 ± 0.1 m; mass = 85.3 ± 10.2 kg; age = 23.4 ± 2.4 years). All subjects had been completing the jerk for a minimum of six months, and reported their split jerk 1 repetition maximum (1-RM: 105.3 ± 19.1 kg). Subjects completed 3 repetitions of each jerk technique, at 85% of their split jerk 1-RM. The data were collected using 6 3D video cameras, with a sampling rate of 200Hz and were analyzed using Vicon software. A multivariate paired t-test was used to determine the effect of jerk technique on all kinematic variables. Paired samples t-tests were used as post hoc analyses when necessary. An alpha level of (p<0.05) was used for all inferential statistics. RESULTS: No significant differences were found between the two techniques for starting barbell position, lowest barbell position and maximum concentric velocity. Peak barbell height, range and displacement were all found to be significantly greater in the power jerk when compared to the split jerk (p<0.05). CONCLUSIONS: Results suggest that more work is done on the barbell, and greater range of motion, occur during the power jerk. The results suggest that more work may be done on the body during the split jerk due to the technique of dropping quickly under the bar for the catch. Less work done on the barbell could result in higher absolute loads, making the split jerk the superior technique for populations such as weightlifting athletes.
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Georgii-Hemming, Bo. "Träd : ett försök till lacansk läsning av Walter Ljungquists berättelser särskilt Jerk Dandelinsviten /." Uppsala : Almqvist & Wiksell, 1997. http://catalogue.bnf.fr/ark:/12148/cb411495512.

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Dissertation--Uppsala, 1997.
Bibliogr. p. 371-406. Résumé en anglais sous le titre : "Tree : an attempt at a Lacanian reading of Walter Ljungquist's narratives, with special regard to the Jerk Dandelin series"
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Smith, Christian. "Input Estimation for Teleoperation : Using Minimum Jerk Human Motion Models to Improve Telerobotic Performance." Doctoral thesis, KTH, Datorseende och robotik, CVAP, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11590.

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This thesis treats the subject of applying human motion models to create estimators for the input signals of human operators controlling a telerobotic system.In telerobotic systems, the control signal input by the operator is often treated as a known quantity. However, there are instances where this is not the case. For example, a well-studied problem is teleoperation under time delay, where the robot at the remote site does not have access to current operator input due to time delays in the communication channel. Another is where the hardware sensors in the input device have low accuracy. Both these cases are studied in this thesis. A solution to these types of problems is to apply an estimator to the input signal. There exist several models that describe human hand motion, and these can be used to create a model-based estimator. In the present work, we propose the use of the minimum jerk (MJ) model. This choice of model is based mainly on the simplicity of the MJ model, which can be described as a fifth degree polynomial in the cartesian space of the position of the subject's hand. Estimators incorporating the MJ model are implemented and inserted into control systems for a teleoperatedrobot arm. We perform experiments where we show that these estimators can be used for predictors increasing task performance in the presence of time delays. We also show how similar estimators can be used to implement direct position control using a handheld device equipped only with accelerometers.
QC 20100810
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Salmond, Layne Hancock. "Characterization of Smoothness in Wrist Rotations." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4322.

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Smoothness is a hallmark of healthy movement and has the potential to be used as a marker of recovery in rehabilitation settings. While much past research has focused on shoulder and elbow movements (reaching), little is known about movements of the wrist despite its importance in everyday life and its impairment in many neurological and biomechanical disorders. Our current lack of knowledge regarding wrist movement prevents us from improving current models, diagnosis, and treatment of wrist disorders. In particular, while movement smoothness is a well-known characteristic of reaching movements and may potentially be used to diagnose and monitor recovery from neurological impairments, little is known about the smoothness of wrist rotations. Therefore, because the smoothness of wrist rotations has not been characterized, it cannot be used as a marker for diagnosis and evaluation. This study examines the smoothness of wrist rotations in comparison to the known baseline of reaching movements. Subjects were asked to perform wrist and reaching movements under a variety of conditions, including different speed and direction. To measure movement smoothness, this study used an established metric of speed profile number of maxima and presents a novel method for characterizing smoothness by fitting a minimum-jerk trajectory to real movement data.The results show that 1) wrist rotations are significantly less smooth than reaching movements (p≤0.0016), 2) smoothness decreases significantly as speed decreases (p<0.0001), and 3) wrist movements exhibit a pattern of smoothness that varies significantly between targets and outbound/inbound movement directions (p<0.0001). Potential causes for results 1 and 3 are presented and tested by simulation or reference to prior studies, because these findings were previously unknown. The decrease in smoothness with speed (result 2) has been found in prior studies of smoothness in reaching and finger movements. The reasoning behind the first result is explored by testing whether the difference in smoothness between wrist and reaching movements was due to differences in mechanical, muscular, neural, or protocol-related properties. The reasoning behind the third result is explored by testing whether the difference in wrist direction was due to anisotropy in musculoskeletal dynamics or anisotropy in movement duration. The simulations show that the wrist’s bandwidth is greater than that of the arm, and that there is nonvoluntary power in the bandwidth of the wrist that would be low-pass filtered in reaching movements, indicating that at least some of the difference in smoothness between wrist and reaching movements is due to differences in mechanical properties. Differences in muscular, neural, or protocol-related properties (signal-dependent noise, proprioceptive acuity, and the speed requirements of the task, respectively) do not appear to be the cause of the difference in smoothness between wrist and reaching movements. Differences in wrist smoothness between movement directions appears to be related to differences in movement duration between directions.
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Huitson, Niki Rae. "An exploratory analysis of the emergence and implications of Breed Specific Legislation: knee-jerk reaction or warranted response? /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2361.

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Oberhauser, Joseph Q. "Design, Construction, Control, and Analysis of Linear Delta Robot." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1460045979.

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Hradil, Jan. "Optimalizace přímého pohonu posuvové osy pomocí hltiče vibrací." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229516.

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This diploma thesis deals with the application of three methods to limit resonances of critical frequencies and with a description of their influence on speed control loop of linear drive. The first damping method involved the use of an electro-magnetic tilger attached to the structure of stand on critical locations. The second method involved the use of a jerk decoupling in linear direct drives. A Cauer-filter that was activated in the controller of linear motor was added to both methods. The appropriate measuring technique for these frequencies was systematically analysed and selected. Further in this document models of mechanical structure and controlling are described. Matlab®/Simulink® software was used for the data processing and the modification of models according to the real structure.
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Books on the topic "Jerk"

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Cooper, Dennis. Jerk. San Francisco: Artspace Books, 1993.

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Jerk. Cambridge: Vanguard Press, 2016.

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Friesen, Jonathan. Jerk, California. New York: Penguin Group USA, Inc., 2008.

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ill, Catalanotto Peter, ed. Soda jerk. New York: Orchard Books, 1990.

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Jerk, California. New York, N.Y: Speak, 2008.

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Little, Jean. Soda jerk. New York: Beech Tree Books, 1993.

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Carlson, Melody. The jerk magnet. Grand Rapids, MI: Revell, 2012.

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Jerk, barbecue from Jamaica. Freedom, Calif: Crossing Press, 1990.

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The jerk next door. [United States]: CreateSpace Independent Publishing Platform, 2016.

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Leaving A-holiness behind: From pious jerk to not-so-pious jerk. United States: CrowdScribed, 2016.

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Book chapters on the topic "Jerk"

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Gallardo-Alvarado, Jaime. "Jerk Analysis." In Kinematic Analysis of Parallel Manipulators by Algebraic Screw Theory, 133–58. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31126-5_6.

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Bonadio, Enrico, and Andrea Borghini. "Jamaica Jerk." In Food, Philosophy, and Intellectual Property, 143–44. London: Routledge, 2024. http://dx.doi.org/10.4324/9781003433675-57.

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Gallardo-Alvarado, Jaime. "Hyper-Jerk Analysis." In Kinematic Analysis of Parallel Manipulators by Algebraic Screw Theory, 159–86. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31126-5_7.

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Holtzblatt, Karen, and Nicola Marsden. "Valuing and Jerk Behaviors." In Retaining Women in Tech, 191–209. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-79208-3_12.

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Williams, J. J. "Low Jerk Cam Lift Curve." In Introduction to Analytical Methods for Internal Combustion Engine Cam Mechanisms, 41–68. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4564-6_3.

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Stretti, Daniele, and Luca Bruzzone. "Motion Profiles with Elliptic Jerk." In Mechanisms and Machine Science, 45–53. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-10776-4_6.

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Herişanu, Nicolae, and Vasile Marinca. "Approximate Analytical Solutions to Jerk Equations." In Dynamical Systems: Theoretical and Experimental Analysis, 169–76. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42408-8_14.

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Marinca, Vasile, Nicolae Herisanu, and Bogdan Marinca. "Approximate Analytical Solutions to Jerk Equations." In Optimal Auxiliary Functions Method for Nonlinear Dynamical Systems, 87–92. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75653-6_8.

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Wang, Xiong, and Guanrong Chen. "Chaotic Jerk Systems with Hidden Attractors." In Emergence, Complexity and Computation, 273–308. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75821-9_11.

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Harker, Jennifer L. "Knee-Jerk Policymaking in Crisis Response." In Reputational Challenges in Sport, 87–103. New York : Routledge, 2018.: Routledge, 2018. http://dx.doi.org/10.4324/9781315165608-7.

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Conference papers on the topic "Jerk"

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Singh, T. "Jerk limited input shapers." In Proceedings of the 2004 American Control Conference. IEEE, 2004. http://dx.doi.org/10.23919/acc.2004.1384077.

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Belyaev, Zachary P., Samuel N. Downes, and Philip A. Voglewede. "In Search of the Jerk Element." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-70486.

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Abstract Mechanical components, such as springs, dampers and mass, alter and influence an engineered system’s motion based upon a system’s position, velocity and acceleration, respectively. This paper aims to discover and develop another element (dubbed the damper) which provides a force proportional to a system’s jerk (i.e., the derivative of acceleration) to better engineer a system’s response. By utilizing the known applications of jerk in motion planning and control theory, existing possible physical implementations and uses of jerk and the jerk element are discussed in relation to its influence on the system’s response, specifically vibration. Using a Buckingham Pi approach, the theoretical background of the jerk element is presented and possible physical parameters are combined to show how the jerk element could be created from common elements and parameters. The most promising approach of varying the magnetic field of existing magneto-rheological dampers is developed to give an example of the jerk element along with the difficulties and concerns in developing the jerk element. This paper serves less of a purpose towards answering all questions of the jerk element, but rather focuses more on posing the appropriate questions which sets the stage for an easily realizable future jerk element which can improve system performance.
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Popescu, Marcela, and Paul Popescu. "Fast movements and jerk mechanics." In 2018 International Conference on Applied and Theoretical Electricity (ICATE). IEEE, 2018. http://dx.doi.org/10.1109/icate.2018.8551416.

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Takeda, Shoichiro, Kazuki Okami, Dan Mikami, Megumi Isogai, and Hideaki Kimata. "Jerk-Aware Video Acceleration Magnification." In 2018 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2018. http://dx.doi.org/10.1109/cvpr.2018.00190.

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Thompson, Arland B. "Minimum Jerk Attitude Slew Maneuvers." In AIAA Scitech 2020 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2020. http://dx.doi.org/10.2514/6.2020-1435.

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"CONTINUOUS JERK TRAJECTORY PLANNING ALGORITHMS." In Special Session on Intelligent Control and Mechatronics. SciTePress - Science and and Technology Publications, 2011. http://dx.doi.org/10.5220/0003648304810489.

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7

Ghazaei Ardakani, M. M., A. Robertsson, and R. Johansson. "Online Minimum-Jerk Trajectory Generation." In IMA Conference on Mathematics of Robotics. Institute of Mathematics and its Applications, 2015. http://dx.doi.org/10.19124/ima.2015.001.18.

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8

Park, Juchirl, and John A. Peterson. "Noise and Vibration Reduction on the Single Axis Adaptive Damping Controls." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62428.

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Reducing or eliminating seat noise and vibration are the main objectives of a semi-active damping system implemented in a commercial vehicle seat. The system must be developed such that control forces minimize seat motion. Abrupt motion with semi-active damping systems is typically called ‘dynamic jerk.’ Semi-active damping in a seat application places the control forces close to the seat occupant so there is less ‘filtering’ to protect the human from feeling dynamic jerk. Whereas in an automotive suspension there might be more tolerance for dynamic jerk because the comparatively heavy vehicle body acts to filter some of the dynamic jerk and the interaction of the tire and road input may also mask it. In this research, dynamic jerk has been addressed and studied for the advanced SEAT application. The seat has been tested with varying sine inputs at specific amplitudes. The response of the semi-active damping seat system has been analyzed to characterize dynamic jerk and a control algorithm has been developed to minimize this undesirable response. The conclusion is that dynamic jerk is dependent on the damper’s physical properties as well as the system’s sensors. A Design of Experiments statistical study was carried out to determine what are the most influencing factors. Limiting the range of damping force reduces the control authority; however, allowing full damping force may trigger dynamic jerk. Identifying the dynamic jerk plays an important role in order to have the indication of the properly tuned system. In this research, the identification strategy of the dynamic jerk is studied and developed.
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Melchior, Pierre, Rim Jallouli-Khlif, Bruno Orsoni, Nabil Derbel, and Alain Oustaloup. "Path Tracking Design Based on Jerk Input Fractional Prefilter and Jerk Limited Input Shaper Approaches." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35518.

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In path tracking design, different methods were developed. In previous works we have presented a method based on fractional differentiation in order to reduce overshoots on the actuator output. It allows the generation of an optimal movement reference-input leading to a minimum path completion time, taking into account the maximum velocity, acceleration and jerk, and the bandwidth of the closed-loop on which the input is applied. Different strategies were developed. In this paper, three methods taking into account the jerk limitation are compared. A comparison with classical input shaper approach is also done. The two first methods, based on fractional differentiation, are used through a Davidson-Cole prefilter with acceleration or jerk bang bang input, to ensure continuity on acceleration and jerk signals on the actuator. The third approach is based on preshaper synthesis with jerk limited input; the shaped input is obtained by convolving desired input with an impulse sequence. The synthesis methodologies of the different methods are studied. Performances are compared on an example, in both frequency and time domains.
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Song, Xubin, Mehdi Ahmadian, and Steve C. Southward. "Eliminating the Unwanted Dynamics From the Controllable Suspensions for Vehicle Applications." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32958.

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This paper presents two alternative implementations of skyhook control, named “skyhook function” and “no-jerk skyhook,” for reducing the dynamic jerk that is often experienced with conventional skyhook control in semiactive suspension systems. An analysis of the relationship between the absolute velocity of the sprung mass and the relative velocity across the suspension are used to show the damping force discontinuities that result from the conventional implementation of skyhook control. This analysis shows that at zero crossings of the relative velocity, conventional skyhook introduces a sharp increase (jump) in damping force, which, in turn, causes a jump in sprung mass acceleration. This acceleration jump, or jerk, causes a significant reduction in isolation benefits that can be offered by skyhook suspensions. The alternative implementations of skyhook control included in this study offer modifications to the formulation of conventional skyhook control such that the damping force jumps are eliminated. The alternative policies are compared with the conventional skyhook control, using a laboratory implementation on a heavy truck seat suspension that represents a base-excited system with a semiactive suspension. An evaluation of the damping force, seat acceleration, and the electrical currents supplied to a magneto-rheological (MR) damper that is used for this study, shows that the alternative implementations of skyhook control can entirely eliminate the damping force discontinuities and the resulting dynamic jerks caused by conventional skyhook control.
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Reports on the topic "Jerk"

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Manuel, Ryan. Xi Jinping's recent absence: back spasm or knee jerk? East Asia Forum, September 2012. http://dx.doi.org/10.59425/eabc.1349042401.

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Hadjit, Rabah, Joris Van Herbruggen, Kazuhide Togai, and Tadashi Takeuchi. Shock & Jerk Analysis for Powertrain Mounting Optimization Using Multibody Models. Warrendale, PA: SAE International, May 2005. http://dx.doi.org/10.4271/2005-08-0349.

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Touzi, R., and A. Sasitiwarih. On the Use of Radarsat and JERS-1 Satellite SARs for Trail and Road Detection in Tropical Rainforests. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/219360.

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4

Vuksanović, Vuk, and Srđan Hercigonja. Između emocija i realizma: Dva lica turske spoljne politike na Balkanu. Belgrade Centre for Security Policy, June 2013. http://dx.doi.org/10.55042/dvvy2324.

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U poređenju sa komentarima o delovanju Rusije i Kine, prodornijem odnosu Turske prema Balkanu se ne poklanja dovoljno pažnje. Kako bi se ova praznina popunila, istraživački tim Beogradskog centra za bezbednosnu politiku (BCBP) sproveo je istraživanje zasnovano na analizi sekundarnog izvornog materijala ali, što je još važnije, i na razgovorima koji su sa šesnaest istraživača i pripadnika akademiske zajednice obavljeni u Istanbulu i Ankari. Iako konsultovani izvori imaju različite biografije i političke simpatije, istraživanjem je utvrđeno da su im određene teme svima zajedničke. Turska spoljna politika na Balkanu, naime, ima dva aspekta. Prvi je zasnovan na emocijama, i tu je spoljna politika države definisana njenim posebnim vezama sa tom oblašću, odnosno zajedničkom istorijom, društvenim vezama, faktorima identiteta i nasleđem Otomanskog carstva. S obzirom na društveno-kulturne veze i činjenicu da je Bosna i Hercegovina država u kojoj je to nasleđe najprisutnije, ona se u kontekstu posebnih veza sa Turskom pominje najčešće. Drugi pristup je ukorenjen u tradicionalnom spoljnopolitičkom realizmu koji proizlazi iz objektivne i proračunate procene regionalnog odnosa snaga i sopstvenih interesa. U okviru tog pristupa, Turska iz bezbednosnih i strateških razloga nastoji da deluje pragmatično i ostvaruje svoje namere na Balkanu, a da se pritom ne uplete u krize koje bi mogle da joj ometaju uticaj u regionu. Ovaj pristup Tursku vodi ka aktivnim odnosima sa Srbijom, koja je u strateškom smislu značajna zemlja u regionu, jer je Ankara duboko uverena da, ukoliko želi da bude delotvorna na Balkanu, mora da ima partnerski odnos sa Beogradom. Pri tome, mora da uspostavi ravnotežu između emocija i realizma. Mora pažljivo da neguje odnose sa zajednicama sa kojima ima kulturne i verske veze, kao što su Bošnjačke i Albanske, ali i da istovremeno pazi da od sebe ne odgurne države poput Srbije, čije joj je partnerstvo neophodno ukoliko želi da postigne uspeh na Balkanu. Turska spoljna politika u regionu prošla je kroz dve faze. U prvoj joj je politika prema Balkanu bila previše fokusirana na istoriju i faktore identiteta. Ta praksa je posebno došla do izražaja u fazi koju kritičari vole da nazivaju „neoosmanizmom“, a koja se najčešće povezuje sa Ahmetom Davutogluom, nekadašnjim ministrom inostranih poslova Turske (2009-2014) i kasnije premijerom (2014–2016). Treba naglasiti da je Redžep Tajip Ergodan i tada bio na vlasti, ali je za politiku prema Balkanu bio zadužen prvenstveno Davutoglu. Međutim, upravo zbog retorike kojom se akcenat stavljao na emocije, istoriju i kulturu, spoljna politika Ankare u regionu je tokom tog perioda doživljavala neuspehe jer su lokalni hrišćanski narodi Tursku doživljavali kao ekspanzionističku silu koja se poziva na ranije imperijalno nasleđe, i kao pristrasnog posrednika koji favorizuje muslimanske zajednice kakva je npr. bošnjačka. Realistički impulsi turske spoljne politike su na površinu izbili u drugoj fazi. Ona je započela odlaskom Ahmeta Davutoglua, kada je predsednik Redžep Tajip Erdogan preuzeo čvršću kontrolu nad spoljnom politikom zemlje, pa i prema Balkanu. Ankara od tada stavlja veći naglasak na realizam i pragmatizam, za razliku od ranijeg insistiranja na strastvenoj, istorijskoj retorici. Ovu transformaciju simbolizuju bliže veze sa Srbijom koje balkanskoj politici Ankare daju veću slobodu. Pre nego što se pojavila vest o Erdoganovoj pobedi, tokom predsedničkih i parlamentarnih izbora koji su u Turskoj održani u maju 2023. godine vodila se žestoka debata o budućem smeru spoljne politike zemlje. Dok su neki tvrdili da ona mora da ostane nepromenjena bez obzira na ishod izbora , drugi su verovali u potencijalne promene u sveukupnom odnosu zemlje sa akterima kao što su EU, SAD i Rusija . Međutim, ni pre ni nakon izbora nije bilo naznaka da će se spoljna politika Turske prema Balkanu bitno promeniti. Naprotiv, može da se očekuje da će upornost međunarodnih i domaćih faktora koji su u igri dovesti do dosledne balkanske politike Turske, te da će tamošnje spoljnopolitičke elite, kada se angažuju na Balkanu, i dalje biti prinuđene da balansiraju između emocija i realizma.
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Greisman, Polina. Ruska propaganda u Srbiji i na Zapadnom Balkanu: kanali na mreži Telegram. Beogradski centar za bezbednosnu politiku, March 2024. http://dx.doi.org/10.55042/xnps2236.

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Tokom poslednjih nekoliko godina Rusija se više puta mešala u unutrašnje stvari drugih zemalja – na primer, tokom izbora u Sjedinjenim Državama 2016. i u Ujedinjenom Kraljevstvu 2019. godine. Postoje bezbrojni primeri njenog uplitanja u tuđe poslove, kao i propagande koja se odvija putem interneta. Ruski propagandni arsenal obuhvata alatke kao što su državni mediji koji emituju program namenjen publici u drugim zemljama (Russia Today, Sputnjik i drugi), zvanični državni nalozi na društvenim mrežama, kao i čitave armije lažnih naloga koji su u više navrata uočeni u kampanjama dezinformisanja i mešanja u politiku drugih država. One su se mnogo puta našle među razlozima za uvođenje sankcija pojedincima bliskim ruskoj vladi, ali i predsedniku Vladimiru Putinu lično. Upečatljiv primer nekoga ko je organizovao ovakvu vrstu mešanja i zbog toga se našao na meti sankcija je Jevgenij Prigožin, koga su nazivali „Putinovim ličnim kuvarom“ i koji je bio povezan sa Agencijom za istraživanje interneta poznatom kao „Fabrika trolova“ ili „Prigožinovi trolovi“. Iako je sam Prigožin poginuo u avionskoj nesreći, njegova „fabrika trolova“ i dalje radi. Srbija nije izuzetak kada je reč o državama čiji su se unutrašnji poslovi našli na udaru mešanja ruske vlade. To se, međutim, zbog prijateljskih odnosa Rusije i Srbije, retko iznosi u javnost. Takođe, takve radnje nisu očigledne, i nije ih lako na prvi pogled okarakterisati kao propagandu i uplitanje. Zbog toga ćemo u ovoj studiji razmotriti ovo pitanje i na primeru Srbije pokazati kojim se metodama propagande i intervenisanja Rusija koristi u zemljama koja se mogu nazvati „prijateljskim“. Posmatrano sa istorijskog stanovišta i u poređenju sa drugim zemljama na Balkanu, odnos Rusije i Srbije je verovatno jedan od najdubljih i najzanimljivijih. Ova vrsta odnosa ne može se nazvati isključivo političkim ili ekonomskim, jer prijateljstvo ovih država počiva na temeljima istorije, religije i etno-jezičke zajednice. Međutim, uprkos tim naizgled čvrstim odnosima, Rusija tokom poslednjih dvadeset godina Srbiju koristi kao platformu za svoju propagandu, držeći se pritom prilično uhodanih metoda . Uz to, Rusija u Srbiji i regionu koristi i svoju meku moć.
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6

Why Competent Jerks Get Hired. IEDP Ideas for Leaders, June 2018. http://dx.doi.org/10.13007/710.

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