Input devices

In 1964 Douglas Cart Engelbart (Stanford Research Institute in California) developed the mouse as an input device and Bill Enghsh built its prototype from a carved block of wood with a single red button. Shortly thereafter, the mouse was used at the Lister Hill Center of the National Institutes of Health for the input of chemical structures. 

IDVl INPUT DEVICE ID IDV2 OUTPUT DEVICE ID... 

Input and output interface This is the interface between the controlling devices and the processor. The input/output (I/O) unit receives signals from the input devices and transmits output action signals to the controlling devices. 

System hardware consists of the central processor, the input devices (usually a keyboard), the output devices (probably both a video display terminal and a hardcopy printer), long-term storage devices, and perhaps communications components. In smaller systems, more than one of these components may be built in to one unit, while in larger systems there may be many units each of several components associated with the system. 

Keyboards are the most widely used input devices, but optical scanners and digital pads (for computer-aided design) are some additional input devices. Input may also be from files stored on a disk or tape. 

Hardware requirements — The system controller responsible for synchronizing the events is defined as LC System 1. It requires at least two time event outputs to trigger the injection of LC System 2 and start MS data collection. If MS fails, the injection of LC System 1 should be inhibited. Autosampler with ready-in, alarm-in, and stop inputs indicate capability to be stopped remotely. The autosampler of LC System 2 must be able to prepare a sample before the run from LC System 1 is finished and hold the sample in the injector loop until an injection signal is received. A manual injection input devices indicates that the autosampler can perform the required function. 

A DCS is also used to control Area 400. The DCS monitors and controls the cycling of the TRBPs, the preheaters, the GPCR reactors, the scrubbers, and the product gas handling system. Each of these subsystems is controlled with a series of control loops tied to the individual control functions through input devices linked to output devices via control algorithms within the DCS. 

There is a parameter necessary to describe the abrasion resistance of each crystalline substance. This abrasion resistance must be correlated with parameters of the power input devices such as pump or stirrer diameter or the stirrer tip speed. The abrasion resistance of the crystalline particles produced by secondary nucleation in industrial crystallization processes is therefore a physical property of the substance. So far there is no physical property known containing all information about this abrasion resis-... 

Hardware considerations for automated performance testing systems generally include the computer, software, monitor, and input devices. These features can be provided on multiple testing platforms, including personal computers, handheld personal digital assistants, Internet-based systems, or on platforms that are specially designed to simulate occupational contexts. 

The basic setup to determine static interfacial tension based on either the Wilhelmy plate method or the du Noiiy ring method (see Alternate Protocol 2) is shown in Figure D3.6.1. It consists of a force (or pressure) transducer mounted in the top of the tensiometer. A small platinum (Wilhelmy) plate or (du Noiiy) ring can be hooked into the force transducer. The sample container, which in most cases is a simple glass beaker, is located on a pedestal beneath the plate/ring setup. The height of the pedestal can be manually or automatically increased or decreased so that the location of the interface of the fluid sample relative to the ring or plate can be adjusted. The tensiometer should preferably rest on vibration dampers so that external vibrations do not affect the sensitive force transducer. The force transducer and motor are connected to an input/output control box that can be used to transmit the recorded interfacial tension data to an external input device such as a monitor, printer, or computer. The steps outlined below describe measurement at a liquid/gas interface. For a liquid/liquid interface, see the modifications outlined in Alternate Protocol 1. Other variations of the standard Wilhelmy plate method exist (e.g., the inclined plate method), which can also be used to determine static interfacial tension values (see Table D3.6.1). 

The term computerized hardware (hereafter referred to as hardware) refers to physical elements including input devices, output devices, network components, signal converters and computers (e.g., controllers, microprocessors, smart instmments). 

If data input or instructions can only come from specific input devices (e.g. instruments, terminals), the system must check the source of the input and the use of the correct device should be verified by the operator (Part 11.10(h)). 

Input Devices These devices are required to get raw data into the computer. It is considered as interface between the user and the system. Various types of input devices are as follows ... 

In the system DARC [228], a special input device (called topocodeur) is used. In computer-assisted organic synthesis, the most widely used input/output method is by means of VDUs [229—232]. This type of input/output is the most familiar to a chemist, since molecules are drawn on the VDU in their usual shape. It is especially interesting for ring compounds and allows us also to deal with the stereochemistry by means of the usual symbols. Although the input via a VDU requires sophisticated hardware, it will probably be used more and more. 

The constitution of a molecule is usually specified by a constitutional formula, i.e., a graph whose nodes are atoms and whose edges are bonds. It seems therefore attractive to put man-machine communication on a graphical basis, too. However, to make EROS independent of special hardware requirements, no use of graphical input devices was projected in the initial phase. 

Operator input devices — keyboards and touch-sensitive displays... 

Input devices (keyboards, mouse, tracker ball, touch screen, and so on)... 

Hardware Inventory Input devices Output devices Signal converters Central Processing Unit Distribution system Peripheral devices... 

Input devices (mouse, touch screen, keyboard)... 

Correct folder/directory structure created and files installed within folders/directories Software configuration completed satisfactorily Site and system identification User access groups Security configuration Menu/display access configuration Logical device connections Inspection of critical hardware components Servers in correct locations Processor speed Cache size ROM bios Memory capacity Peripherals Storage devices Input devices... 

Automation System A system based on a computer technology with input devices (e.g., sensors), output devices (e.g., actuators), and communication links (e.g., telemetry and cable networks) that are collectively designed to perform a specific function or group of functions (e.g., control, protection or monitoring). Automation systems may be linked into larger integrated systems. [Defined for this book.]... 

Sensor FDA (1995) A peripheral input device that senses some variable in the system envi-ronment, such as temperature, and converts it to an electrical signal that can be further converted to a digital signal for processing by the computer. 

The most important input device for a PC is the keyboard. All PC motherboards contain a connector (as shown in Figure 2.11) that allows a keyboard to be connected directly to the motherboard through the case. There are two main types of keyboard connectors AT and PS/2. The AT connector is round, about 1/2" in diameter, and has 5 sockets in the DIN-5 configuration. 

M utting information into the computer involves more than just turning it on. You need a keyboard, mouse, or some other type of input device. Output devices take data from the computer and translate it to some other usable form. An A+ technician must be able to troubleshoot and fix problems with these types of devices. 

In the next section, you learned about the various kinds of input and output devices that are commonly used with computers. You learned what input devices are commonly used with computers, like mice and keyboards as well as graphics tablets. You also learned about some types of hardware used to get data out of a computer, including monitors, printers, and modems. You learned what function each component has and how each component differs from the others. 

Which of the following is the most important input device ... 

System board Storage device Power supply Processor/CPU Memory Input devices Hard drive Keyboard Video board Mouse... 

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