Screens, touch sensitive

Touch sensitive screens are another mechanism for indicating a choice of items on the screen. It is a course device, with the limit to its resolution governed by the size of a finger, rather than electromechanical constraints in the previous devices. The method of interaction is to point to and/or touch the object or menu item on the screen. 

The other type of PDA is known as a Handheld PC (HPC). These are basically shrunken laptops. The HPCs run an operating system, known as Windows CE, from (whom else ) Microsoft. Windows CE is basically Windows 95 shrunken to fit into the limited RAM of the HPC. Instead of using a mouse to point to the icons and menus in Windows CE, the HPCs use a stylus on the touch-sensitive screen. 

More recent advances in technology made possible by the personal digital assistant (PDA) have allowed physicians to electronically prescribe at the point of care. PDAs are handheld computers that typically run using a Windows- or other proprietary-based platforms. These PDAs use a touch-sensitive screen to maneuver through a menu-driven prescribing process that can execute a prescription in as little as three stylus taps. - The PDAs or other proprietary devices then upload the prescription via a network connection or modem to be printed, faxed, or electronically transmitted to a pharmacy. 

The usual input device is a keyboard which may contain 90 or more keys. For the novice computer user, simply finding the correct key can be a daunting task, so alternative input devices have been developed. These include touch-sensitive screens, tracker balls, light pens and so on. Perhaps the most common alternative to the keyboard is the mouse. This is simply a small box with one or more buttons on the top and a tracker ball on its underside. The mouse is connected to the computer via a single cable. As the mouse is moved over a flat surface, sensors detect the movement of the ball and the computer can calculate the position of the mouse. An arrow or similar symbol is usually displayed on the screen and this symbol moves in synchrony with the mouse. The mouse can be used to move the symbol to indicate choices on the screen and these can then be selected by pressing one of the buttons on the mouse. While experienced computer-users sometimes complain that mouse-based... 

Continuous time-intensity scaling can be recorded using external devices such as strip-chart recorders, potentiometers, or computers. Computer data acquisition has facilitated the recording of time-intensity data a scale is displayed on a computer screen and the panelists position the computer cursor on the scale to indicate the intensity of the attribute at each instant in time, using various data input methods such as moving a computer mouse or light pen, or joystick, or touching a touch-sensitive screen. 

Fig. 8 (top) Cross-sectional view of a transparent multilayered ferroelectric relaxor film vibrator under a cover with capacitive touch sensitive layers, (bottom) Photograph of a tactile-feedback touch screen with a single layer P(VDF-TrFE-CTFE) vibrator (Reprinted with permission (Ju et al. 2014))... 

The ATA/ATTA system uses a touch sensitive screen to facilitate all user inputs there is no requirement for conventional keyboard entries. Keys on the screen are labelled with simple text, whenever an input from the operator is required. 

At least Errington knew that he, with the powers in Ottawa on his side, would probably get what he wanted in the long run. In the meantime there was the odd little victory, such as finally securing permission to have Eldorado employees located at Chalk River to learn about isotope production. In November 1950, Ken Coltas, head of the special products laboratory at Port Hope, arrived with another Eldorado staffer for a preliminary visit to the Chalk River plant. On entering the gates that surrounded the reactor compound, they set off radiation alarms intended to screen workers who were leaving the site. Coltas was not surprised, because he had heen in touch with Chalk River staff about health monitoring and knew that their detectors would be sensitive to radiation levels that were common in Port Hope. Still, everyone at Chalk River heard about the incident, and the reputation of Port Hope as a sloppy outfit was reconfirmed. ... 

The importance here is to recognise the limitation of the test. In addition to the nonequilibrium temperature of the test and the complex distribution of strain, the curve is measured at 2 rpm, which is an arbitrary time-scale. The material behaviour may be different at other time-scales this situation is exactly like a blind man touching an elephant . In addition, at this time scale the Mooney rheometer is not very sensitive to a small difference between the gum rubbers. Therefore, this method is for the screening and catching only a gross difference among the samples. The Mooney test is performed for the specification in any event, and therefore, it is proposed here to pay attention to the shape of the curves also. 

---