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Accessibility vs. Usability – Where is the Dividing Line?
Published in Philip D. Bust, Contemporary Ergonomics 2006, 2020
Sambhavi Chandrashekar, Rachel Benedyk
This also illustrates the compensating role played by assistive technologies in providing alternative or enhanced modes. A screen reader program enables a person with visual impairment to perceive visual content through audio output (speakers) and operate interface controls through the tactile input (keyboard). A screen magnifier program enables a person with low vision to perceive visual content through enhanced visual output.
Experimental analysis of the volumetric and thermal efficiency performance of a novel direct piezo-acting CVVT mechanism
Published in International Journal of Green Energy, 2023
A. Sürmen, M.I Karamangil, A Avcı, B. Dirim, F. Işıklı, M. Tekin, N. Türköz
This is not very high pressure in terms of considerations, such as leakage and compressibility. The cross-section of this hydraulic magnifier is shown in Figure 3(b), and its integrated form with piezo is shown in Figure 3(c). The theoretical magnification factor of this design is (80/8)2 = 100, as 8 mm is the diameter of the exit channel of the hydraulic magnifier. Under 1000 V voltage, it is expected to be at least 7.6 mm with some losses. When the maximum lift exceeds 7.6 mm, it can be decreased by decreasing the triggering voltage. The integrated form of piezo stack and hydraulic magnifier were coupled to the cylinder head via an adaptor piece. The valve timing was changed without stopping the engine using a specially designed driver. A surge tank, an orificemeter connected to it, and an inclined manometer were used to measure of the airflow rate.
Assistive technology use in the workplace by people with blindness and low vision: perceived skill level, satisfaction, and challenges
Published in Assistive Technology, 2023
Michele C. McDonnall, Anne Steverson, Rachael Sessler Trinkowsky, Katerina Sergi
We found that the number of AT used on the job varied widely, from 1 to 22, with an average of 7 ATs reported. If only one AT was used, which was reported by seven people, most used a screen reader or screen magnifier. With the prevalent use of computers in the workplace, screen readers and screen magnifiers were commonly used and were the ATs used most frequently on the job, depending on vision level. Apps on smartphones or tablets were used by a large majority of participants and were also used frequently on the job, although use of specific types of apps for different functions varied widely. Widespread use of apps at work coincides with Martiniello et al.'s (2019) finding that apps have replaced the use of other AT devices for many people. The top three most frequently used AT, by vision level, identified in this study may be considered core technology tools for which people with B/LV who are preparing for employment should receive training.
Are we there yet? The developing state of mobile access equity
Published in Assistive Technology, 2022
Notably, headphone jacks and screen magnifier were present at greater percentages in Lifeline provider phone models. The screen magnifier feature is considered advanced and typically associated with the latest digital mobile phones. The presence of this feature, at higher rates, on Lifeline phones indicates Lifeline phone providers are sourcing more phone models with advanced accessibility options. This shift diverges from the 2017 Accessibility Review findings on Lifeline phones that found diminished levels of accessibility on all advanced features. Despite Tier 1 phone models outperforming Lifeline-provided models on the presence of accessibility features, there is a more encouraging finding that shows devices obtained from Lifeline providers have improved accessibility levels compared to 2017 data. The Lifeline program was designed to close the income-based access gap i. Figure 17 illustrates that the gap may be narrowing by noting the increase in accessibility features present in Lifeline phone models in the 2019 sample compared to the 2017 sample.