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Price: EUR 250.00Authors: Venâncio, Geisy Anny | Heemann, Adriano | Chaves, Liliane Iten
Article Type: Research Article
Abstract: This paper approaches the challenge of considering the principles of sustainable development in the conception of products, services or systems in a specific territory, though inserted in a globalized world. The reflection takes place by crosschecking the information gathered through bibliographical research on the following themes: wellbeing, design, and the local versus global relation. Thus, the strategy of analysis adopted comprehends the triangulation of information for further comparison of the survey and discussion of the data obtained. This paper results in a set of reflections on the interactions between human beings and their territories, towards new conceptions oriented to a …more sustainable future. Show more
Keywords: Sustainability, ergodesign, satisfaction, need
DOI: 10.3233/WOR-2012-0648-2175
Citation: Work, vol. 41, no. Supplement 1, pp. 2175-2178, 2012
Authors: Trierweiller, Andréa Cristina | Peixe, Blênio César Severo | Tezza, Rafael | Bornia, Antonio Cezar | de Andrade, Dalton Francisco | de Souza Campos, Lucila Maria
Article Type: Research Article
Abstract: Growing challenges with respect to preserving the environment have forced changes in company operational structures. Thus, the objective of this article is to measure the evidence of Environmental Management using the Item Response Theory, based on website analysis from Brazilian industrial companies from sectors defined through the scope of the research. This is a qualitative, exploratory, and descriptive study related to an information collection and analysis instrument. The general view of the research problem with respect to the phenomenon under study in based on multi-case studies, with the methodological outline based on the theoretical reference used. Primary data was gathered …from 270 company websites from 7 different Brazilian sectors and led to the creation of 26 items approved by environmental specialists. The results were attained with the measuring of Environmental Management evidence via the Item Response Theory, providing a clear order of the items involved based on each item's level of difficulty, quality, and propriety. This permitted the measurement of each item's quality and propriety, as well as that of the respondents, placing them on the same analysis scale. Increasing the number of items and companies involved is suggested fEor future research in order to permit broader sector analysis. Show more
Keywords: Environmental management performance, Industry websites, Disclosure, Measurement, Item response theory
DOI: 10.3233/WOR-2012-1023-2179
Citation: Work, vol. 41, no. Supplement 1, pp. 2179-2186, 2012
Authors: Neuhöfer, Jan A. | Govaers, Felix | Mokni, Hichem El | Alexander, Thomas
Article Type: Research Article
Abstract: Augmented Reality focuses on the enrichment of the user’s natural field of view by consistent integration of text, symbols and interactive three-dimensional objects in real time. Placing virtual objects directly into the user’s view in a natural context empowers highly dynamic applications. On the other hand, this necessitates deliberate choice of information design and density, in particular for deployment in hazardous environments like military combat scenarios. As the amount of information needed is not foreseeable and strongly depends on the individual mission, an appropriate system must offer adequate adaptation capabilities. The paper presents a prototypical, vehicle-mountable Augmented Reality vision system, …designed for enhancing situation awareness in stressful urban warfare scenarios. Tracking, as one of the most crucial challenges for outdoor Augmented Reality, is accomplished by means of a Differential-GPS approach while the type of display to attach can be modified, ranging from ocular displays to standard LCD mini-screens. The overall concept also includes envisioning of own troops (blue forces), for which a multi-sensor tracking approach has been chosen. As a main feature, the system allows switching between different information categories, focusing on friendly, hostile, unidentified or neutral data. Results of an empirical study on the superiority of an in-view navigation cue approach conclude the paper. Show more
Keywords: outdoor augmented reality, situation awareness, information design, information density
DOI: 10.3233/WOR-2012-0441-2187
Citation: Work, vol. 41, no. Supplement 1, pp. 2187-2194, 2012
Authors: Teixeira, Luís | Vilar, Elisângela | Duarte, Emília | Rebelo, Francisco | da Silva, Fernando Moreira
Article Type: Research Article
Abstract: Previous studies suggest significant differences between navigating virtual environments in a life-like walking manner (i.e., using treadmills or walk-in-place techniques) and virtual navigation (i.e., flying while really standing). The latter option, which usually involves hand-centric devices (e.g., joysticks), is the most common in Virtual Reality-based studies, mostly due to low costs, less space and technology demands. However, recently, new interaction devices, originally conceived for videogames have become available offering interesting potentialities for research. This study aimed to explore the potentialities of the Nintendo Wii Balance Board as a navigation interface in a Virtual Environment presented in an immersive Virtual Reality …system. Comparing participants’ performance while engaged in a simulated emergency egress allows determining the adequacy of such alternative navigation interface on the basis of empirical results. Forty university students participated in this study. Results show that participants were more efficient when performing navigation tasks using the Joystick than with the Balance Board. However there were no significantly differences in the behavioral compliance with exit signs. Therefore, this study suggests that, at least for tasks similar to the studied, the Balance Board have good potentiality to be used as a navigation interface for Virtual Reality systems. Show more
Keywords: Virtual Reality, Navigation interfaces, Human performance, Emergency egress
DOI: 10.3233/WOR-2012-0649-2195
Citation: Work, vol. 41, no. Supplement 1, pp. 2195-2200, 2012
Authors: Conradi, Jessica | Alexander, Thomas
Article Type: Research Article
Abstract: Exploration of a Virtual Environment (VE) might vary as well in applied technology as in the conceptual design. A conceptual difference of exploring style and navigation type relates to the degree of freedom a user possesses. It ranges from completely unrestricted to completely restricted navigation. To assess the impact of different exploration styles, an experiment was carried out. Four different styles were compared in a large-scale VE. The navigation of the participants was either free or restricted in various levels concerning motion and viewing direction. During the exploration, the participants memorized the location of flags, which represented special events at …these locations. The participant’s task was to memorize position and color of the flags. Subsequently, they marked the positions and colors of the flags in a map of the scene. The performance in this task was captured, as well as data about their amount of experienced simulator sickness and subjective workload. Additionally, balancing tests were administered to investigate in an objective measurement of simulator sickness. Each condition showed the same achievement in the memorizing task and the subjective workload. Furthermore, the measured high variance in simulator sickness symptoms overrode other effects. In the balancing tests a basic influence of exposure with VE was found. However, subsequent interviews with the participants showed that the personal impression of the efficiency of exploration method was highly individual. By finding and matching exploration methods to individual persons, benefit by using Virtual environments could be enhanced. Show more
Keywords: virtual environments, HMD, exploration, simulator sickness
DOI: 10.3233/WOR-2012-0442-2201
Citation: Work, vol. 41, no. Supplement 1, pp. 2201-2207, 2012
Authors: Liston, Paul M. | Kay, Alison | Cromie, Sam | Leva, Chiara | D’Cruz, Mirabelle | Patel, Harshada | Langley, Alyson | Sharples, Sarah | Aromaa, Susanna
Article Type: Research Article
Abstract: This paper outlines the approach taken to iteratively evaluate a set of VR/AR (virtual reality / augmented reality) applications for five different manual-work applications – terrestrial spacecraft assembly, assembly-line design, remote maintenance of trains, maintenance of nuclear reactors, and large-machine assembly process design – and examines the evaluation data for evidence of the effectiveness of the evaluation framework as well as the benefits to the development process of feedback from iterative evaluation. ManuVAR is an EU-funded research project that is working to develop an innovative technology platform and a framework to support high-value, high-knowledge manual work throughout the product lifecycle. …The results of this study demonstrate the iterative improvements reached throughout the design cycles, observable through the trending of the quantitative results from three successive trials of the applications and the investigation of the qualitative interview findings. The paper discusses the limitations of evaluation in complex, multi-disciplinary development projects and finds evidence of the effectiveness of the use of the particular set of complementary evaluation methods incorporating a common inquiry structure used for the evaluation – particularly in facilitating triangulation of the data. Show more
Keywords: evaluation, iterative development, virtual reality, augmented reality, manual work
DOI: 10.3233/WOR-2012-0443-2208
Citation: Work, vol. 41, no. Supplement 1, pp. 2208-2215, 2012
Authors: Brouillette, David | Thivierge, Guillaume | Marchand, Denis | Charland, Julie
Article Type: Research Article
Abstract: Muscle fatigue is considered as one of the major risk factors for developing musculoskeletal disorders. The aim of this project was to select an adequate fatigue assessment model for an implementation in Dassault Systemes digital human modeling software. A review of existing MET models has been done resulting in a decision to use the extended Ma's model (2010). In this project, only shoulder and elbow joints have been tested and more subjects will be necessary for further validation. The model has been compared to several endurance time (ET) static studies. Two dynamic experiments were also performed by two different subjects. …The results showed that because of the inter-individual variability, a simple prediction curve or value, can’t well predict individual measured ET (or task failure). There is a need for a chart representation which also shows standard deviation (SD) range. Considering the SD range, the results were included in the prediction. Thus, this range may help the human factors expert to nuance the prediction results while considering environment factors and some realities specific to the industry. Show more
Keywords: Muscle exhaustion, Human Modeling, Digital 3d Manikin, Human Simulation
DOI: 10.3233/WOR-2012-1024-2216
Citation: Work, vol. 41, no. Supplement 1, pp. 2216-2225, 2012
Authors: Paul, Gunther | Daniell, Nathan | Fraysse, François
Article Type: Research Article
Abstract: Seat pressure is known as a major factor of seat comfort in vehicles. In passenger vehicles, there is lacking research into the seat comfort of rear seat occupants. As accurate seat pressure measurement requires significant effort, simulation of seat pressure is evolving as a preferred method. However, analytic methods are based on complex finite element modeling and therefore are time consuming and involve high investment. Based on accurate anthropometric measurements of 64 male subjects and outboard rear seat pressure measurements in three different passenger vehicles, this study investigates if a set of parameters derived from seat pressure mapping are sensitive …enough to differentiate between different seats and whether they correlate with anthropometry in linear models. In addition to the pressure map analysis, H-Points were measured with a coordinate measurement system based on palpated body landmarks and the range of H-Point locations in the three seats is provided. It was found that for the cushion, cushion contact area and cushion front area/force could be modeled by subject anthropometry, while only seatback contact area could be modeled based on anthropometry for all three vehicles. Major differences were found between the vehicles for other parameters. Show more
Keywords: seat comfort, seat posture, rear occupant, pressure mapping, vehicle package design
DOI: 10.3233/WOR-2012-0444-2226
Citation: Work, vol. 41, no. Supplement 1, pp. 2226-2231, 2012
Authors: Wirsching, Hans-Joachim | Engstler, Florian
Article Type: Research Article
Abstract: Many digital human models provide the crucial method to calculate postures in virtual environments. Traditionally these methods refer to experiments and make use of statistical modeling. They provide sufficient results in their specialized domain, but cannot be used in general applications. In addition they do not consider important design aspects as forces and discomfort. Hence a new force based approach has been introduced in order to overcome these shortcomings. Based on biomechanical models of active maximal and passive receding joint torques, a mechanical optimization generates static stable postures and related discomfort ratings. The results were promising, but showed some model …deficiencies and were not validated in detail. The present paper continues this work and provides necessary model enhancements. Finally the new prediction models are validated on real experiments. The validation results are presented and discussed regarding to usability aspects and future development work. Show more
Keywords: biomechanics, digital human model, generic simulation model, validation
DOI: 10.3233/WOR-2012-0445-2232
Citation: Work, vol. 41, no. Supplement 1, pp. 2232-2237, 2012
Authors: Santos, V. | Guimarães, C.P. | Franca, G.A.N. | Cid, G.L. | Paranhos, A.G.
Article Type: Research Article
Abstract: The goal of this paper is to present the advantages on the use of 3D Digital Human Models (DHM) on the design of public transport vehicles. In this case, the subjects were scanned using the WBX Cyberware 3D Whole Body Scanner, with functional and daily postures according to the use of public transportation and some especial cases, such as a mother with her offspring or a business man with his valise, so the volume of the person would be taken in consideration. A data collection was created to simulate several situations of the daily use of the vehicle.
Keywords: ergonomics, occupancy, magnetic levitation train and digital human model
DOI: 10.3233/WOR-2012-1025-2238
Citation: Work, vol. 41, no. Supplement 1, pp. 2238-2242, 2012
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