Injury patterns in distance running may be related to kinematic adjustments induced by fatigue. The goal was to measure changes in lower extremity mechanics during an exhaustive run in individuals with and without a history of iliotibial band syndrome (ITBS). Sixteen recreational runners ran to voluntary exhaustion on a treadmill at a self-selected pace. Eight runners had a history of ITBS. Twe...

The role played by the cerebellum in movement control requires knowledge of interdependent relationships between kinetic neural commands and the performance (kinematics) of learned motor responses. The eyelid motor system is an excellent model for studying how simple motor responses are elaborated and performed. Kinetic variables (n = 24) were determined here by recording the firing activities ...

The purpose of this paper was to systematically assess the effect of Oxford Foot Model (OFM) marker misplacement on hindfoot relative to tibia, and forefoot relative to hindfoot kinematic calculations during the stance phase of gait. Marker trajectories were recorded with an 8-camera motion analysis system (Vicon Motion Systems Ltd., UK) and ground reaction forces were recorded from three force...

A novel dimensional synthesis technique for solving the mixed exact and approximate motion synthesis problem for planar RR kinematic chains is presented. The methodology uses an analytic representation of the planar RR dyads rigid body constraint equation in combination with an algebraic geometry formulation of the exact synthesis for three prescribed locations to yield designs that exactly rea...

A number of inverse problems in wave propagation admit division of the model space into kinematic or propagator variables and dynamic or amplitude (or reeectivity, or source, or...) variables. The dynamic variables have a linear or essentially linear innuence on the simulated data, hence the best t formulations of inverse problems are separable in the sense of nonlinear programming. Mean square...

Abstract: Subject of this paper is a method for consideration of control variable limits of single actuators in a redundant driven kinematic structure of a wheeled mobile robot (wmr). It is assumed that the desired robot state is given by the translational and rotational velocity of a coordinate system fixed to the robot frame. With the assumption of rigid body elements, motion is possible only...

This paper addresses the problem of planning the movement of highly redundant humanoid robots based on non-linear attractor dynamics, where the attractor landscape is obtained by combining multiple force fields in different reference systems. The computational process of relaxation in the attractor landscape is similar to coordinating the movements of a puppet by means of attached strings, the ...

This chapter focuses on redundancy resolution schemes, i. e., the techniques for exploiting the redundant degrees of freedom in the solution of the inverse kinematics problem. This is obviously an issue of major relevance for motion planning and control purposes. In particular, task-oriented kinematics and the basic methods for its inversion at the velocity (first-order differential) level are ...

Simple models involving the gradual outboard accretion of material along curvilinear subduction zones are often inconsistent with field-based evidence. A recent study using 3-D geodynamic modelling has shown that the entrainment of an exotic continental fragment within a simple subduction system can result in a complex phase of growth. Although kinematic models based on structural mapping and h...

We present and evaluate two statistical methods for estimating kinematic relationships of the speech production system: Artificial Neural Networks and Locally-Weighted Regression. The work is motivated by the need to characterize this motor system, with particular focus on estimating differential aspects of kinematics. Kinematic analysis will facilitate progress in a variety of areas, including...