Comparing the Active, Functional, and Passive Range of Motion of Finger Joints Using Dynamic Measurement

Studies on finger kinematics, especially the range of motion (RoM) measurements, are essential to understand the use of finger joints and the pathology of related disease. Limited literatures compared the active RoM (A-RoM) of finger joints with either their functional RoM (F-RoM) or passive RoM (p-RoM) using different measuring protocols and...

Exploring the feasibility of placing a wind turbine on top of an FPSO

Changing the way of power production on a Floating, Production, Storage, and Offloading (FPSO)<br/>system by using renewable power can contribute to reducing an FPSO’s carbon footprint while operating. Bluewater Energy Services is interested in the use of a wind turbine placed on top of an<br/>FPSO, to power the FPSO’s internal electricity grid....

IOC based trajectory generation to increase human acceptance of robot motions in collaborative tasks

Collaboration between humans and robots is an important aspect of Industry 4.0. It can be improved by incorporating human-like characteristics into robot motion planning. It is assumed that humans move optimal with respect to a certain objective or cost function. To find this function, also for a robot, we use an inverse optimal control...

Effects of a Disturbed Kinetic Chain in the Fastball Pitch on Elbow Kinetics and Ball Speed

The purpose of the present study was to investigate the effect of an experimentally imposed kinetic chain disturbance in baseball pitching on ball speed and elbow kinetics. The experimental design consisted of two (within-subject) conditions. In one condition there was no manipulation (control condition). The other condition involved a...

Drift-Free Inertial Sensor-Based Joint Kinematics for Long-Term Arbitrary Movements

The ability to capture joint kinematics in outside-laboratory environments is clinically relevant. In order to estimate kinematics, inertial measurement units can be attached to body segments and their absolute orientations can be estimated. However, the heading part of such orientation estimates is known to drift over time, resulting in...

Timing of peak pelvis and thorax rotation velocity in baseball pitching

The objective of the present study was to examine the magnitude and timing of peak pelvis and thorax rotations in achieving high throwing velocities in pitching fastballs. During the preseason (Test 1 or T1) and four months later (Test 2 or T2), kinematic analysis was performed on eight elite youth pitchers throwing fastballs. Peak rotation...

A method for lower back motion assessment using wearable 6D inertial sensors

Low back pain (LBP) is a leading cause of activity limitation. Objective assessment of the spinal motion plays a key role in diagnosis and treatment of LBP. We propose a method that facilitates clinical assessment of lower back motions by means of a wireless inertial sensor network. The sensor units are attached to the right and left side of...

Concept Design and Analysis of TWD Motion Compensated Pile Gripper

Nowadays, as it is a easy sequence in construction and installation, the monopile is the most common used support structure. Due to the limitation of water depth and lifting capacity, jack-up vessels gradually become unable to fulfill the demands of monopile installation. Floating vessels can expand the market of wind farminstallation due to the...

Dynamic in situ calibration of an instrumented treadmill for systems identification and parameter estimation

Existing re-calibration methods for instrumented treadmills have mainly been performed when the instrumented treadmill has been in static operation i.e. the belts are not running. The effect re-calibrating during experimental operation, i.e. while the belts are running, on the ground reaction force (GRF) and the center of pressure (CoP) accuracy...

Assessment of joystick and wrist control in hand-held articulated laparoscopic prototypes

Various steerable instruments with flexible distal tip have been developed for laparoscopic surgery. The problem of steering such instruments, however, remains a challenge, because no study investigated which control method is the most suitable. This study was designed to examine whether thumb (joystick) or wrist control method is designated for...

Objective classification of residents based on their psychomotor laparoscopic skills

Background - From the clinical point of view, it is important to recognize residents’ level of expertise with regard to basic psychomotor skills. For that reason, surgeons and surgical organizations (e.g., Acreditation Council for Graduate Medical Education, ACGME) are calling for assessment tools that credential residents as technically...

Force feedback and basic laparoscopic skills

Background - Not much is known about the exact role offorce feedback in laparoscopy. This study aimed to determine whether force feedback influences movements of instruments during training in laparoscopic tasks and whether force feedback is required for training in basic laparoscopic force application tasks. Methods - A group of 19 gynecologic...

Retracting and seeking movements during laparoscopic goal-oriented movements. Is the shortest path length optimal?

Aims- Minimally invasive surgery (MIS) requires a high degree of eye–hand coordination from the surgeon. To facilitate the learning process, objective assessment systems based on analysis of the instruments’ motion are being developed. To investigate the influence of performance on motion characteristics, we examined goaloriented movements in a...

The influence of experience and camera holding on laparoscopic instrument movements measured with the TrEndo tracking system

Passive ranging using an infrared search and track sensor