Industrial

Dynamic behavior of reinforced clayey sand under cyclic loading
Experimental investigations and modeling of linear elasticity of fiber-reinforced clayey sand under cyclic loading unloading are conducted in this paper. Experimental studies are focused on four aspects. First, a series of cyclic triaxial tests, with different confining pressures and deviator stress ratios up to 150 cycles, are performed. Impacts of fiber content, cell pressure, deviator stress...


A case-oriented approach to a lead/acid battery closed-loop supply chain network design under risk and uncertainty
A new scenario based stochastic and possibilistic mixed integer programming model for a multi-objective closed-loop supply chain network design problem by considering financial and collection risks is proposed. Uncertainties in the form of randomness and fuzziness are handled together for a better reflection of the problem. Different risk measures such as “variability index”, “downside ri...
Consistent unscented incremental smoothing for multi-robot cooperative target tracking
In this paper, we study the problem of multi-robot cooperative target tracking, where a team of mobile robots cooperatively localize themselves and track (multiple) targets using their onboard sensor measurements as well as target stochastic kinematic information, and which is hence termed cooperative localization and target tracking (CLA). A novel efficient, consistent, unscented incremental s...


Comparison between conventional and digital nuclear power plant main control rooms: A task complexity perspective, part I: Overall results and analysis
Digitalization is a trend in safety-critical complex systems. It changes the way human interacts with systems. We have less empirical knowledge about its potential negative effects on human. In our study, we compared conventional and digital main control rooms (MCRs) in nuclear power plants (NPPs) from a task complexity perspective. Complexity factors in MCRs were quantified in terms of three a...
Comparison between conventional and digital nuclear power plants: A task complexity perspective, Part II: Detailed results and analysis
Part II of this study aims to provide detailed, diagnostic information about the complexity difference between conventional and digital main control rooms (MCRs) in nuclear power plants. Complexity factors were classified according to task components and complexity dimensions. The effects of operator experience and plant type on complexity factors were statistically analyzed from three levels, ...


Kinematic compatibility between the body and a mock spacesuit during basic upper body motions
In this study, a novel conceptual method was tested to study the kinematic mismatch between the body motion of an occupant with respect to a rigid suit. It was hypothesized that differences between body and suit motion would require extra body movement to achieve the desired suit motion. To quantify the mismatch in kinematics, mock upper body suits with an open structure were used in conjunctio...
Inter- and intra-tester reliability when measuring seated spinal postures with inertial sensors
Prolonged awkward sitting postures may be associated with neck or back pain, but it is often unclear which specific postures cause most problems and which mechanisms that may underlie the pain. In order to increase the knowledge in this field, it seems crucial first of all to be able to analyse, in depth, different seated spinal postures. A problem is however the lack of reliable and direct mea...

All at sea: An ergonomic analysis of oil production platform control rooms
Control rooms on offshore production platforms are the focal point for their safe and efficient operation. Following the Piper Alpha disaster in 1988 a sizeable body of safety literature was generated covering the Ergonomic/Human Factors issues then in play. More than twenty years have passed since that time and significant changes have occurred to how control rooms are manned and the technolog...
A biomechanical assessment of hand/arm force with pneumatic nail gun actuation systems
A biomechanical model is presented to estimate user hand/arm force exertion with two pneumatic nail gun trigger systems. The sequential actuation trigger (SAT) is safer than the contact actuation trigger (CAT) but increases the user's exertion of force because the trigger must be actuated after the safety tip is held pressed against the workpiece. Time integrated hand force was calculated for a...

Case study of the impact of toecap type on the microclimate in protective footwear
Protective footwear plays a critical role in work effectiveness and personal safety. It exhibits special properties due to the use of protective elements and materials, but these components may deteriorate its hygienic characteristics. This paper presents a study on the influence of toecap type on the microclimate in protective footwear (ankle boots). Toecaps made of metal and of a composite po...
Usability is more valuable predictor than product personality for product choice in human-product physical interaction
Product personality and product usability are two important factors which can influence consumers' product choice. Published literature are available regarding independent impact of product personality and product usability on product choice but no research has been reported so far for understanding their collective influence on product choice. In addition, which factor between usability and pr...

Good reasons for high variability (low inter-rater reliability) in performance assessment: Toward a fuzzy logic model
Regular performance assessment is an integral part of (high-) risk industries. Past research shows, however, that in many fields, inter-rater reliabilities tend to be moderate to low. This study was designed to investigate the variability of performance assessment in a naturalistic setting in aviation. A modified think-aloud protocol was used as research design to investigate the reasoning pair...
The study of tactile feeling and It's expressing vocabulary
Tactile feeling is an important sense of people's use of products in our daily life. However, how people express and verbalize their tactile feeling has hardly been systematically studied. Thus, the purpose of this study is to investigate how people describe their tactile feeling and how this expression will be affected by visual experience. To achieve the purpose a focus interview was conducte...
Effects of occupational vibration exposure on cognitive/motor performance
Whole-body vibration (WBV) occupational exposure levels were determined with 29 different types of machinery. Two distinct WBV exposure profiles were found and reproduced in a controlled exposure situation that involved the transformation of a vehicle. A sample of 45 volunteer subjects was recruited to assess the effects of WBV on their cognitive/motor performance. Two different tests were sele...
Effects of work experience on work methods during dynamic pushing and pulling
Pushing and pulling are potential risk factors for work-related low back disorders (WRLBDs). While several studies have evaluated differences in work methods related to work experience, such evidence for dynamic pushing and pulling is limited. Eight novices and eight experienced workers completed dynamic push/pull tasks using a cart weighted to 250% of individual body mass in two different conf...