he purpose of this study was to acquire, process, and analyze ventilation and peak inspiratory airflows during exercise to obtain a representative sample set of ventilation data of the general working population. A total of 13 volunteers exercised on a treadmill at three relative work rates of 40%, 60%, and 80% of their maximal aerobic capacity. Ventilation measurements and peak inspiratory air...

Input constraints are active in robot trajectory planning when a mobile robot traverses mobility challenges such as steep hills that limit the acceleration of the robot due to the torque constraints of the motor or engine or in manipulator lifting tasks when the load is sufficiently heavy that the torque constraints of the robot’s motor prevent it from statically supporting the load in regions ...

One Column Stripping with non-increasing Area first mapping algorithm (OCSA) was proposed by Chakchai So-In et al to schedule bursts on downlinks of base station by giving priority to the largest bursts to OFDMA frame. However, size-based scheduling that favor large items are known to exhibit poor average delay performance especially under workload distributions that are highly skewed (i.e., he...

Construction equipment is typically massive and operated manually with minimal use of sensors or computers for measurement or control. Research in the Intelligent Systems and Structures Divisions at the National Institute of Standards and Technology has explored innovative ways to use sensors, computers, and lightweight, tensioned, cable machines for heavy manufacturing and construction tasks s...

This paper focuses on a new approach to robot design and control for dealing with heavy loads. Referring to human dynamic motion, we studied dynamic task strategies to create large forces by dynamically moving the internal body. Much greater force can be obtained by this technique than the traditional quasi-static technique. Kinematic and dynamic behavior of human and robot is analyzed with dyn...

Construction equipment is typically massive and operated manually with minimal use of sensors or computers for measurement or control. Research in the Intelligent Systems and Structures Divisions at the National Institute of Standards and Technology has explored innovative ways to use sensors, computers, and light-weight, tensioned, cable machines for heavy manufacturing and construction tasks ...

While heavy lifting has been identified as an important risk factor for low back disorders, little is known about workplace spatial layout - the relative positions of shelves and the impact of this on spine loads. The objective of the current study was to investigate how the relative positions of the load origin and destination impact three-dimensional spine loads. Seven females and seven males...

PURPOSE The metabolic cost of walking increases when mass is added to the legs, but the effects of load magnitude and location on the energetics and biomechanics of walking are unclear. We hypothesized that with leg loading 1) net metabolic rate would be related to the moment of inertia of the leg (I(leg)), 2) kinematics would be conserved, except for heavy foot loads, and 3) swing-phase sagitt...

Incorporation of crop residues into the soil can reduce its susceptibility to compaction. However, the signi®cance of incorporated crop residue at different soil water contents at the time of compaction and the compaction loads is not well documented. The compactibility of three soils which contained different amounts of sugarcane residue was investigated at different water contents and compact...

DOBZHANSKY, SPASSKY and TIDWELL ( 1963) have reported experiments on the effects of inbreeding on the egg to adult viability in progenies of Drosophila pseudoobscura females collected in several places in Arizona and California. As expected, the inbred progenies were less viable than the outbred ones, and the greater degree of inbreeding (brother-sister mating) gave a greater reduction of the v...