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Marine radar
Published in Alexander Arnfinn Olsen, Core Principles of Maritime Navigation, 2023
Parallel indexing (PI) is a useful method of monitoring cross-track tendency. It helps in assessing the distance at which a given ship will pass a fixed object on a particular course. The index line is drawn parallel to the planned ground track and should touch the edge of a radar echo of a fixed object, at a range equal to the desired passing distance. Any cross-track tendency (such as those caused by a tidal stream, drift or current) will become apparent as the target moves off the parallel line. This technique can be used in both relative and true motion. To set the PI, use the trackball to select the PI line number box. Select a PI line number and push the left button to turn it on or off. Then, roll the scroll wheel to adjust the PI line orientation between 000 T to 359.9 T.
Technology Solutions and Programs to Promote Leisure and Communication Activities with People with Intellectual and other Disabilities
Published in Christopher M. Hayre, Dave J. Muller, Marcia J. Scherer, Everyday Technologies in Healthcare, 2019
Giulio E. Lancioni, Nirbhay N. Singh, Mark F. O’Reilly, Jeff Sigafoos
Shih et al. (2009) assessed whether an adolescent and an adult with profound intellectual disabilities and extensive motor impairment would learn to use thumb poke responses to control preferred environmental stimulation. The microswitch used for the participants was an adapted computer mouse and their response consisted of poking with their thumb the mouse’s scroll wheel. The responses were transmitted wirelessly to a mini computer, which was connected to (and arranged to regulate) a television set. The television set was inactive during the baseline phases and presented brief music events and videos contingent on the participants’ response during the intervention and post-intervention phases. Data showed that both participants increased their response levels during the intervention and post-intervention periods, indicating their ability to pursue stimulation events independently and their consistent interest for the stimulation.
DESIGNING FOR PEOPLE WITH LOW VISION: LEARNABILITY, USABILITY AND PLEASURABILITY
Published in Paul T. McCabe, Contemporary Ergonomics 2004, 2018
Each participant was visited twice in their own home where a reading test was administered, once using a CCTV machine, either their own if they were experts or with a SmartView 8000, and once using a mock-up of the control panel of the redesigned product now known as myReader, running off simulation software on a Compaq Evo laptop. MyReader incorporates processed text, automatic scrolling and uses a Liquid Crystal Display. The x-y table is eliminated and navigation is via trackball or scroll wheel. The order of product exposure was counterbalanced.
Three-dimensional interactive cursor based on voxel patterns for autostereoscopic displays
Published in Journal of Information Display, 2022
Vladimir Saveljev, Jung-Young Son, Choonsik Yim, Gwanghee Heo
To avoid dealing with unique pointing devices, we extended the paradigm of 2D control, recalling that a regular mouse with a scroll wheel is already a 3D pointing device. The scrolling angle of the wheel can be treated as an additional coordinate. In our approach, it is the distance from the cursor to the screen of a display device (i.e. the ‘depth’ of a 3D image). Therefore, a specially designed 3D pointing device becomes unnecessary, and then the scroll down means ‘forward’ or ‘farther’ from an observer, while the scroll up means ‘backward’ or ‘closer’ to the observer.
TouchWheel: Enabling Flick-and-Stop Interaction on the Mouse Wheel
Published in International Journal of Human–Computer Interaction, 2023
Sunmin Son, Jingun Jung, Auejin Ham, Geehyuk Lee
The second method was implemented by some of the Logitech mouse products, such as the M720 Triathlon (Logitech, 2016). They have a scroll wheel that switches between normal and free-spinning modes. In the free-spinning mode, the wheel spins like a frictionless flywheel, enabling rapid and continuous scrolling. A clear advantage is that it allows users to continue to have a physical wheel, which may be important for them for the aforementioned reasons. A downside is that it requires explicit mode switching, which may negatively affect the usability of the mouse.