1,721,020 research outputs found
Investigating the productivity in different assembly system configurations for a better inclusion of disabled workers
Full text linkOne of the United Nations' Sustainable Development Goals is focused on decent work and growth which aims to reduce and, finally, remove all barriers for people with a form of diversity like disability. In such a context, manufacturing and production systems should be adapted by adopting specific equipment to help workers with disability while executing jobs according to the type of disability they report. Jobs must be properly planned since disabled workers have physical or cognitive disabilities and specific rights to work. Further, aiming to guarantee a real inclusion of workers with disability production systems should be designed to include these workers in the same working environment as workers without disability. This paper focuses on assembly systems, and it aims to investigate how different designs could impact both the productivity and inclusion of disabled workers. Then, due to the higher variety of products belonging to the same family mixed model assembly systems are consi..
A Human-Centered Design Procedure for Conceptualization Using Virtual Reality Prototyping Applied in an Inflight Lavatory
No full textFor designing large-scale products like an airplane, engaging end-users in the concept phase is difficult. However, early user evaluation is important to choose the path which fits the user’s needs best. In particular, comfort-related assessments are difficult to conduct with digital models that are shown on a desktop PC application. Digital Human Modelling (DHM) plays a role in postural comfort analysis, while the subjective comfort feedback still largely relied on consulting with end-users. This paper applies a human-centered design process and analyses the advantages and disadvantages of using VR prototypes for involving users during concept design. This study focused on using VR prototypes for concept selection and verification based on comfort assessment with potential end-users. The design process started with an online questionnaire for identifying the quality of the design elements (Step 1 online study). Then, alternative concepts were implemented in VR, and users evaluated these concepts via a VR headset (Step 2 Selection study). Finally, the research team redesigned the final concept and assessed it with potential users via a VR headset (Step 3 Experience study). Every design element contributed positively to the long-haul flight comfort, especially tap-basin height, storage, and facilities. The male and female participants had different preferences on posture, lighting, storage, and facilities. The final prototype showed a significantly higher comfort rate than the original prototypes. The first-person immersion in VR headsets helps to identify the nuances between concepts, thus supports better decision-making via collecting richer and more reliable user feedback to make faster and more satisfying improvements.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Ergonomics and DesignMechatronic DesignMaterials and Manufacturin
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Development of a Human Reliability Analysis (HRA) model for break scheduling management in human-intensive working activities
Full text link2016 - 2017Human factors play an inevitable role in working contexts and the occurrence of human errors impacts on system reliability and safety, equipment performance and economic results. If human fallibility contributes to majority of incidents and accidents in high-risk systems, it mainly affects the quality and productivity in low-risk systems. Due to the prevalence of human error and the huge and often costly consequences, a considerable effort has been made in the field of Human Reliability Analysis (HRA), thus arriving to develop methods with the common purpose to predict the human error probability (HEP) and to enable safer and more productive designs. The purpose of each HRA method should be the HEP quantification to reduce and prevent possible conditions of error in a working context. However, existing HRA methods do not always pursue this aim in an efficient way, focusing on the qualitative error evaluation and on high-risk contexts. Moreover, several working aspects have been considered to prevent accidents and improve human performance in human-intensive working contexts, as for example the selection of adequate work-rest policies. It is well-known that introducing breaks is a key intervention to provide recovery after fatiguing physical work, prevent the growth of accident risks, and improve human reliability and productivity for individuals engaged in either mental or physical tasks. This is a very efficient approach even if it is not widely applied. ... [edited by Author]XXX cicl
A Staggered Seat is Beneficial for the Flying V Aircraft
No full textStaggered seats might be a solution for a V-shaped aircraft (the Flying V). The cabin longitudinal axis of this airplane has a 26° angle with respect to the direction of flight. When seats are positioned in the direction of flight, they consequently have an angle to the cabin and become staggered. It is unknown whether the comfort of this staggered seat is appreciated. In this study, 117 participants tested the comfort and the privacy experience in this staggered seat compared with a regular aircraft seat. The experiment showed that both comfort and privacy were significantly better in the staggered seats. However, the analysis is based on short-term evaluations, which means that long-term effects still need to be studied and also the effects of groups travelling together need to be investigated.Materials and ManufacturingApplied Ergonomics and DesignFlight Performance and Propulsio
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Effects of Foot–Floor Friction on Trip-Induced Falls During Shuffling Gait: A Simulation Study
No full textThe Entropic Complexity of Human Factor in Collaborative Technologies
No full textIn recent years manufacturing and assembly lines are undergoing workplace changes with a scope to adapt to the Industry 4.0 (I4.0) design principles. Automation of manufacturing, collaborative robots (cobots), interconnection of cyber physical systems (CPS), cloud computing, big data analytics and Augmented/Virtual reality (AR/VR) are some of the technologies that are being introduced in industry. Human operators are required to adapt and integrate into those new environments. Human operators should be flexible in their work-tasks, upgrade their skillset and be able to act as a safeguard entity in this complex and dynamic environment. A recent shift in paradigms, the Industry 5.0 concept, focus on the sustainability of the human factor inside the technologies that I4.0 framework introduced, and relates to the ageing workforce issue and the change in individuals’ capabilities. Productivity and safety of the ageing operators in the new workplace environment is causally related to their capabilities. In this research paper, we (i) study the interactions of human operator inside the “smart” workplace and (ii) develop a model using the entropy concept of statistical mechanics. This model can be utilized in the evaluation of human factor inside the complex environment by computing the probability of error based on human operator capabilities
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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