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Published in Philip A. Laplante, Comprehensive Dictionary of Electrical Engineering, 2018
input buffer a temporary storage area where input is held. An input buffer is necessary when the data transfer rate from an input device is different from the rate at which a computer system can accept data. Having an input buffer frees the system to perform other tasks while waiting for input. input current shaping a technique to force the line current to assume the same shape as the line voltage of a rectifier in order to achieve low harmonic distortion and high power factor correction. input device a peripheral unit connected to a computer system, and used for transferring data to the system from the outside world. Examples of input devices include keyboard, mouse, and light pen. input impedance (1) when a voltage is applied to a conducting material, a current will flow through the material. The ratio of the voltage to the current is known as the input impedance and
Interaction Technologies
Published in Constantine Stephanidis, User Interfaces for All, 2000
In any computer application, a distinction exists between input intended to control the computer (commands) and input intended to be retained (data). The choice of appropriate input device will be heavily influenced by whether the device will be used primarily in the issuance of commands or in the input of data. In fact, the desktop has separate input devices for these two categories. The mouse is used primarily for commands, whereas the keyboard is used for the input of data. The types of applications that are primarily command oriented should not be discounted. Any data retrieval application (such as many of those based on the World Wide Web) is primarily command oriented. The commands are used to navigate to the desired data item(s), and then to specify how that data is to be displayed. In a data retrieval application, only search facilities require free-text input.
Multimedia Systems
Published in Sreeparna Banerjee, Elements of Multimedia, 2019
An input device is a hardware mechanism that sends information from the outside world to the computer, whereas an output device is hardware used to communicate the result of data processing carried out either by the CPU or the user.
User Representations in Human-Computer Interaction
Published in Human–Computer Interaction, 2021
Sofia Seinfeld, Tiare Feuchtner, Antonella Maselli, Jörg Müller
In some cases, the input device may provide control of fewer DoF than the User Representation offers. In such cases, multiple input devices can be combined, each providing some of the available DoF. For example, in a shooter game, the player may only be able to control the avatar’s viewing direction with a mouse or joystick, and a second input device (e.g., use of a keyboard or second joystick) is needed to control walking. Alternatively, additional DoF may be controlled autonomously by the computer, for example through animations. Interestingly, computer-controlled animations do not necessarily reduce the perception of agency: for example, when playing Super Mario Bros,5https://www.nintendo.com/games/detail/new-super-mario-bros-u-deluxe-switch/. the user only controls the overall movement and head direction of the virtual character, but the arm and leg movements are computer animated.