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Price: EUR 250.00Authors: Vitório, Daiana Martins | Masculo, Francisco Soares | Melo, Miguel O.B.C.
Article Type: Research Article
Abstract: Electrical systems can be categorized as critical systems where failure can result in significant financial loss, injury or threats to human life. The operators of the electric power control centers perform an activity in a specialized environment and have to carry it out by mobilizing knowledge and reasoning to which they have adequate training under the terms of the existing rules. To reach this there is a common mental request of personnel involved in these centers due the need to maintain attention, memory and reasoning request. In this sense, this study aims to evaluate the Mental Workload of technical workers …of the Control Centers of Electrical Energy. It was undertaken a research on operators control centers of the electricity sector in Northeast Brazil. It was used for systematic observations, followed by interview and application of the instrument National Aeronautics and Space Administration Task Load Index known as NASA-TLX. As a result there will be subsidies for an assessment of mental workload of operators, and a contribution to improving the processes of managing the operation of electric utilities and the quality of workers. Show more
Keywords: ergonomics, electric control centers, fatigue, mental workload
DOI: 10.3233/WOR-2012-0531-2831
Citation: Work, vol. 41, no. Supplement 1, pp. 2831-2839, 2012
Authors: Alm, Håkan | Osvalder, Anna-Lisa
Article Type: Research Article
Abstract: The aim of this paper is to make a review of studies concerning problems with alarm systems and to make a theoretical analysis of these problems. The aim is also to show some general design ideas to improve alarm presentation in process descriptions. Using research results from situation awareness and decision making a number of suggestions for further development of alarm systems are presented. Recommendations include providing operators of complex systems feedback that can support their mental models and situational awareness. Furthermore a recommendation is to design alarm systems that can learn from experience.
Keywords: Alarm systems, dynamic decision making, process control, complex systems
DOI: 10.3233/WOR-2012-0532-2840
Citation: Work, vol. 41, no. Supplement 1, pp. 2840-2844, 2012
Authors: Pikaar, Ruud N.
Article Type: Research Article
Abstract: Process operators supervise and control complex processes. To enable the operator to do an adequate job, instrumentation and process control engineers need to address several related topics, such as console design, information design, navigation, and alarm management. In process control upgrade projects, usually a 1:1 conversion of existing graphics is proposed. This paper suggests another approach, efficiently leading to a reduced number of new powerful process graphics, supported by a permanent process overview displays. In addition a road map for structuring content (process information) and conventions for the presentation of objects, symbols, and so on, has been developed. The impact …of the human factors engineering approach on process control upgrade projects is illustrated by several cases. Show more
Keywords: Process control, power graphic, permanent overview display
DOI: 10.3233/WOR-2012-0533-2845
Citation: Work, vol. 41, no. Supplement 1, pp. 2845-2852, 2012
Authors: Hsieh, Min-Han | Hwang, Sheue-Ling | Liu, Kang-Hong | Liang, Sheau-Farn Max | Chuang, Chang-Fu
Article Type: Research Article
Abstract: The study was conducted from the perspective of human factors engineering in order to compare the process that operators originally used to diagnose potential and actual faults with a process that included an expert system for diagnosing faults. The results of the study indicated that the existence of an expert system for fault diagnosis makes the task of fault diagnosis easier and reduces errors by quickly suggesting likely Abnormal Operating Procedures (AOPs)
Keywords: Nuclear Power Plant, Fault diagnosis, Expert system
DOI: 10.3233/WOR-2012-0534-2853
Citation: Work, vol. 41, no. Supplement 1, pp. 2853-2858, 2012
Authors: Bligård, L.-O. | Andersson, J. | Osvalder, A.-L.
Article Type: Research Article
Abstract: In a thermal power plant the operators’ roles are to control and monitor the process to achieve efficient and safe production. To achieve this, the human-machine interfaces have a central part. The interfaces need to be updated and upgraded together with the technical functionality to maintain optimal operation. One way of achieving relevant updates is to study other domains and see how they have solved similar issues in their design solutions. The purpose of this paper is to present how interface design solution ideas can be transferred from domains with operator control to thermal power plants. In the study 15 …domains were compared using a model for categorisation of human-machine systems. The result from the domain comparison showed that nuclear power, refinery and ship engine control were most similar to thermal power control. From the findings a basic interface structure and three specific display solutions were proposed for thermal power control: process parameter overview, plant overview, and feed water view. The systematic comparison of the properties of a human-machine system allowed interface designers to find suitable objects, structures and navigation logics in a range of domains that could be transferred to the thermal power domain. Show more
Keywords: Thermal power plant, human-machine system, human-machine interface, graphical user interface
DOI: 10.3233/WOR-2012-0535-2859
Citation: Work, vol. 41, no. Supplement 1, pp. 2859-2865, 2012
Authors: Wang, Lingyan | Lau, Henry Y.K.
Article Type: Research Article
Abstract: It is a well recognized understanding that workers whose voice needs to be heard should be actively encouraged as full participants and involved in the early design stages of new ergonomic work system which encompass the development and implementation of new tools, workplaces, technologies or organizations. This paper presents a novel participatory strategy to evaluate three key psychological factors which are respectively mental fatigue, spiritual stress, and emotional satisfaction in work system design based on a modified version of Participatory Ergonomics (PE). In specific, it integrates a PE technique with a formulation view by combining the parallel development of PE …strategies, frameworks and functions throughout the coverage of the entire work system design process, so as to bridge the gap between qualitative and quantitative analysis of psychological factors which can cause adverse or advantageous effects on worker’s physiological and behavioral performance. Show more
Keywords: Participatory ergonomics, psychological factors, work system design
DOI: 10.3233/WOR-2012-0658-2866
Citation: Work, vol. 41, no. Supplement 1, pp. 2866-2871, 2012
Authors: Sharan, Deepak | Ajeesh, P.S.
Article Type: Research Article
Abstract: ‘Workstyle’ can be described as a mechanism by which ergonomic and psychosocial risk factors interact to affect the development, exacerbation and/or maintenance of upper limb pain and functional limitations. Workstyle is associated with the increase in the work demand. In today’s life use of computer in the workplace is very common and it causes to increase the work demand among the workers who are working with computer. As work demand increase, according to the characteristic of workstyle, risk of the development of musculoskeletal disorders also increased. This study aimed at to findout the association between ergonomics risk factors, workstyle and …WRMSD. Two hundred IT professionals participated in this study. Result revealed that most prevalenet body regions were lower back (20%), Upper back (16%) and shoulder (14%). Study result says that there is a positive association between workstyle score with musculoskeletal pain (r=0.85). Also it revealed that posture and regional pain is associated (r=0.62), per day use of computer and musculoskeletal pain (r=0.46), micro breaks and pain (r=0.87) and productivity and the pain (r=0.95). This study further validates these observations and extends support for the assessment of working postures and workstyle behaviors during the design of WMSD treatment. Show more
Keywords: workstation information, working posture information, workstyle questionnaire
DOI: 10.3233/WOR-2012-0536-2872
Citation: Work, vol. 41, no. Supplement 1, pp. 2872-2875, 2012
Authors: Buzanello, Márcia Rosângela | Moro, Antônio Renato Pereira
Article Type: Research Article
Abstract: The cold environment is an indispensable for slaughtering and processing in the poultry industry In field studies it was observed that a large percentage of workers of this sector have hand contact with the cold chicken and / or frozen, have high complaints prevalence of pain and discomfort, mostly in the hands. The contact of human skin with a cold surface may cause pain, numbness and risk of skin damage. Currently, although the use of infrared thermal imaging has been useful in identifying normal and abnormal patterns of heat distribution on the surface of the body. However your use for …work tasks and to assess the potential development of injuries related to it has been limited. Based on the physiological responses can be objectively evaluate the effects of the task demands of work and thus contribute to the development of effective strategies for ergonomic intervention. The methodology will be used to evaluate the subjective thermal sensation with analogue scale of ASHRAE and the infrared thermography in the dorsal and palmar hands. Thus the objective of this research is to propose reference values for thermographic hands within limits of comfort. Show more
Keywords: Artificial cold, Ergonomic, Infrared thermography
DOI: 10.3233/WOR-2012-0537-2876
Citation: Work, vol. 41, no. Supplement 1, pp. 2876-2881, 2012
Authors: Gorunova, L.
Article Type: Research Article
Abstract: The paper deals with the application of the activity theory in describing psychological determinants of the information searching activity. The notions of information behavior, information retrieval, information competence, information retrieval activity given in Russian and English scientific literature are compared. The research approach to the information retrieval activity based on the principles developed in the Russian theory of activity is described; and the fundamentals of G. Sukhodolsky’s generalized conception of activity are presented for the first time. Analysis of empirical researches showed that specific features of information search depend on how the user evaluates information resources, information, conditions and results …of search. Psychological determiners of information search may be detected as the system of evaluative alternatives, which is generated by the user during the process of his experience growth. We discovered that user’s evaluation system is also related to his individual typological and personal regulative features and determines the choice of the search strategy. Show more
Keywords: Information searching, activity theory, subjective representation
DOI: 10.3233/WOR-2012-0538-2882
Citation: Work, vol. 41, no. Supplement 1, pp. 2882-2886, 2012
Authors: Diniz, Thiago Bernardes | Silva-Costa, Aline | Griep, Rosane Harter | Rotenberg, Lúcia
Article Type: Research Article
Abstract: We aimed at analyzing whether Minor Psychiatric Disorders (MPD) is associated to night work either currently or in the past. A cross-sectional study was conducted at three public hospitals in Brazil, with female nursing workers. Data collection (N=1,134) was based on a comprehensive questionnaire that included the self-reported questionnaire (SRQ-20) for screening of MPD. Former night workers were subdivided into three groups according to their reasons for leaving night work: (i) directly related to work, (ii) related to better reconcile with studies or another job, and (iii) related to health, sleep, fatigue or stress. Binomial logistic regression was performed, with …adjustment for potential confounders. A dose response gradient was observed between current night work and MPD (OR=1.5; 95% CI: 1.1–2.2 and OR=2.1; 95%CI: 1.5–3.1 for those who worked up to five nights and six or more nights per 2-week span, respectively). Potential detrimental effects of night work were confirmed. The association between working at night and MPD was not restricted to current night workers as workers who left night work for health/fatigue/sleep/strain also showed higher chances of reporting MPD (OR=1.8;95%CI:1.14-2.90). Results contribute to the scientific debate on the impact of night work on health and wellbeing. Show more
Keywords: Night Work, Mental Health, Nursing, Work Organization, SQR-20
DOI: 10.3233/WOR-2012-0539-2887
Citation: Work, vol. 41, no. Supplement 1, pp. 2887-2892, 2012
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