Effects of a vertical keyboard design on typing performance, user comfort and muscle tension

Galen, G.P. van; Liesker, Hanneke; Haan, Ab de

doi:10.1016/j.apergo.2005.09.005

Cited by 18 publications

(12 citation statements)

References 24 publications

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“…In this section, we investigate a design that merely relies on ergonomic guidelines and evaluate its outcome. Galen et al (2007) redesigned the conventional keyboard (flat and horizontal design) to minimize forearm pronation; the rotation of the hand and forearm so that the palm of the hand faces downwards. The solution created is a vertical keyboard (Figure 3) which eliminates user forearm pronation.…”

Section: Ergonomic Design To Improve Usabilitymentioning

confidence: 99%

A Review of Affordances and Affordance-Based Design to Address Usability

Masoudi

Fadel

Pagano

et al. 2019

Proc. Int. Conf. Eng. Des.

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Maier and Fadel pioneered Affordance-Based Design (ABD) based on Gibson's revolutionary theory of affordances and Norman's deployment of the concept in his book, “The Design of Everyday Things”. Gibson (1979) introduced the affordance concept into the discipline of Ecological Psychology to address the interactions between an object and an agent. The Ecological approach includes the direct perception of affordances for the user along with a consideration of the users’ biomechanics. However, as the concept of affordance was imported and utilized in different disciplines, including engineering design, some important aspects of Ecological theory were omitted.This paper is an attempt to review the definitions and different utilizations of the affordance concept focusing on the design of usable products to identify the different views and the missing elements. After addressing the divergent viewpoints of affordances, we provide recommendations to improve the usability aspects in ABD by considering direct perception and ergonomics. We claim that a design (based on affordances) that fails to address both criteria may result in a product that is less usable.

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Section: Ergonomic Design To Improve Usabilitymentioning

confidence: 99%

A Review of Affordances and Affordance-Based Design to Address Usability

Masoudi

Fadel

Pagano

et al. 2019

Proc. Int. Conf. Eng. Des.

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show abstract

“…The musculoskeletal diseases are one of the main health problems faced by workers today, may drive them to an inability to perform activities due to the repetitive use of movement or maintenance of awkward postures at work. The results of this are: pain, fatigue, muscle weakness, swelling and, consequently, work performance declining [14][15].…”

Section: Musculoskeletal Diseasesmentioning

confidence: 99%

Members of the human body prone to musculoskeletal damages: a comparison between the sector of transportation and footwears production

Lima

Colaço

Silva

et al. 2012

Work

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This study present areas of the body more prone to develop diseases by musculoskeletal efforts, ie, RTD, in two companies of Paraiba, Brazil. To this end, was made a comparative analysis with respect to the type of work performed (standing, sitting) and the parts that suffer most discomfort after a day's work in a footwear industry and a bus transportation company. The quanti-qualitative research was conducted through semi-structured interviews with 227 employees in the period 2008 to 2009, having as methodological the tool diagram of painful areas of Corlett and Manenica. It was concluded that the areas most affected by musculoskeletal disorders are located in the neck (9,2%), backs (23,6%), shoulders (14,5%) and legs (11,3%), being usually caused by inapproprietes postures, repetitive movements and work station no adequate the anthropometry of the users. Thus, we recommend the adoption of ergonomic measures that enable a healthy and safe environment for workers.

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“…Typing is a task that involves the activation of the forearm muscles and finger muscles. To investigate the muscular participation while typing, a previous study (van Galen et al, 2007) has chosen the muscle groups as follows. The three pairs of extensor and flexor muscle are selected due to their involvement in lifting and downward pressing motion of finger during typing.…”

Section: Human Muscle Selectionmentioning

confidence: 99%

“…According to van Galen et al (2007), it is suggested that the muscles being involved are the FCU and FCR shown in Figure 1, and ECU and ECRL shown in Figure 2.…”

Section: Human Muscle Selectionmentioning

confidence: 99%

Study of electromagnetic field radiation on the human muscle activity

Mansor¹,

Abas²,

Mahadi³

2011

RBEB

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The use of electrical appliances has enhanced the quality of life. As a result, the electricity demand rapidly increased. Although it provides advantages to life, people are exposed to the electromagnetic field radiation without realizing it. This study focuses on the impact of electromagnetic field radiation on the human muscles by using Electromyography (EMG) apparatus. The radiation is measured from the electrical appliances inside the office room with fluorescent lights as well as a computer with liquid crystal display (LCD) and cathode ray tube (CRT) screen. 17 subjects with no history of chronic musculoskeletal or abdominal pain participated in this study. The EMGs of the forearm muscles, including flexor carpi radialis (FCR), extensor carpi radialis longus (ECRL), flexor carpi ulnaris (FCU), and extensor carpi ulnaris (ECU) are recorded with a sampling rate of 2,000 Hz. The analysis of variance (ANOVA) is performed to determine the impact of electromagnetic field radiation on the forearm muscles. It is found that CRT radiation has a significant effect on the forearm muscles.

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Effects of a vertical keyboard design on typing performance, user comfort and muscle tension

Cited by 18 publications

References 24 publications

A Review of Affordances and Affordance-Based Design to Address Usability

A Review of Affordances and Affordance-Based Design to Address Usability

Members of the human body prone to musculoskeletal damages: a comparison between the sector of transportation and footwears production

Study of electromagnetic field radiation on the human muscle activity

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