Photoplethysmographic (PPG) waveforms are used to acquire pulse rate (PR) measurements from pulsatile arterial blood volume. PPG waveforms are highly susceptible to motion artifacts (MA), limiting the implementation of PR measurements in mobile physiological monitoring devices. Previous studies have shown that multichannel photoplethysmograms can successfully acquire diverse signal information ...

Work-related musculoskeletal disorders (WMSD) are caused by the overuse of muscles in the workplace. Performing repetitive tasks is a primary risk factor for the development of WMSD. Many workers in highly repetitive jobs exhibit muscle pain and decline in handgrip strength, yet the mechanisms underlying these dysfunctions are poorly understood. In our study, rats performed voluntary repetitive...

This paper presents repetitive and adaptive motion control schemes for rigid-link robot manipulators, when the manipulator’s joint velocities cannot be measured by the control system. The control objective consists in tracking a prescribed desired trajectory. In the case of repetitive control, the desired trajectory is periodic and it is required that the robot achieve the control objective thr...

Repetitive control refers to a family of algorithms that are particularly useful when either the servo command or disturbance is largely periodic. Examples are very common in machine tools, data storage systems, and sensor testing. Any oscillatory or rotational motion generates some periodic error in both the active and ancillary motion axes. The Internal Model Principle of control theory state...

In this work, a novel scheme is proposed to compress human motion capture data based on hierarchical structure construction and motion pattern indexing. For a given sequence of 3D motion capture data of human body, the 3D markers are first organized into a hierarchy where each node corresponds to a meaningful part of the human body. Then, the motion sequence corresponding to each body part is c...

We introduce an algorithm for calculating, offline or in real time and with no explicit system characterization, the feedforward input required for repetitive motions of a system. The algorithm is based on the secant method of numerical analysis and gives accurate motion at frequencies limited only by the signal-to-noise ratio and the actuator power and range. We illustrate the secant-solver al...

This article summarizes a case load of cumulative trauma disorder (CTD) patients seen during 1993 and 1994, outlines a suggested protocol for the case management of CTD cases, and proposes a new model or “law” of repetitive motion. The actual techniques have been described previously and must be developed by the provider through personal hands-on instruction and careful application over a perio...

In this paper, detecting and segment the moving vehicles by making use of dynamically adaptive threshold using the full-search sum of absolute difference (FSSAD) algorithm. In the past, Gaussian based background model is used to detect the moving objects. It cannot effectively deal with sudden change in illumination, snowfall, fog, and repetitive motions such as swaying leaves. In this paper, F...

Zoologists are interested in the rapid movements of giant honeybees. Especially the mass-movement of bees during the defense behavior is of interest. State of the art approaches measure the motion of a single bee using a laser vibrometer, which does not provide geometric information on mass-motion like speed, intensity, starting point or mesh density. To overcome this problem, a vision based me...

The latest HEVC video coding standard [1] has improved the coding performance by applying a number of innovative tools compared to its predecessor H.264/AVC [2][3] including a wider range of variable block size motion estimation (ME), motion compensation (MC), prediction, and transformation units. The use of multiple reference frames (MRFs) with variable block sizes typically provides better co...