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Sitter-selected postures in an office chair with minimal task constraints
Studies of office workers- postures indicate that reclined postures are less common than upright or forward-leaning postures. Laboratory studies have shown that back extensor activity and internal pressure in the lumbar intervertebral disks are lower in reclined postures. Given these advantages,...
Service design pre-trip planning and the international visitors attending the 2010 Soccer World Cup.
The 2010 FIFA Soccer World Cup, a multi-city event drawing visitors around the world into the existing South African transportation system, provides an opportunity to showcase and learn about the impact of different passenger transport service design strategies. However, bid and subsequent planning...
Dynamic safety of active trailer steering systems
The dynamic safety of an active steering system for an articulated heavy goods vehicle is investigated. The vehicle is a tractor semi-trailer with two independently steerable axles on the trailer. Several different vehicle dynamics modelling approaches are used to investigate the aspects of the...
Language processes during overt and covert speech in a simulated driving task
We used MEG to explore the neural correlates of language processing in a simulated driving environment. Functional MRI and MEG studies require subjects to remain still and not move their mouths, unlike real on-road driving conditions. MEG was used to identify the cortical regions engaged in...
Interactions of out-of-position small-female surrogates with a depowered driver airbag.
The objectives of this study were to examine the response, repeatability, and injury predictive ability of the Hybrid III small-female dummy to static out-of-position (OOP) deployments using a depowered driver-side airbag. Five dummy tests were conducted in two OOP configurations by two different...
Finite element investigation of seatbelt systems for improving occupant protection during rollover crashes
The seatbelt system, originally designed for protecting occupants in frontal crashes, has been reported to be inadequate for preventing occupant head-to-roof contact during rollover crashes. To improve the effectiveness of seatbelt systems in rollovers, in this study, we reviewed previous...
Modeling ascending and descending stairs using the human motion simulation framework
The Human Motion Simulation Framework (Framework) is a hierarchical set of algorithms for predicting and analyzing task-oriented human motion. The Framework was developed to improve the performance of commercial human modeling software by increasing the accuracy of predicted motions and the speed...
Acquisition, response, and error rates with three suites of collision warning sounds
The acquisition, response speed, and error rates of three suites of collision warning sounds were investigated to evaluate the effect of sound alteration on responding. In each suite, four sounds were pictorially associated with four collision scenarios. Suite A included two natural sounds, and two...

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