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Resistive Touchscreen
In electrical engineering, a resistive touchscreen is a touch-sensitive computer display composed of two flexible sheets coated with a resistive material and separated by an air gap or microdots.[2]Contents1 Description and operation 2 Comparison with other touchscreen technology 3 See also 4 References 5 External linksDescription and operation[edit] There are two different types of metallic layers. The first type is called matrix, in which striped electrodes on substrates such as glass or plastic face each other. The second type is called analogue which consists of transparent electrodes without any patterning facing each other. As of 2011 analogue offered lowered production costs.[citation needed] When contact is made to the surface of the touchscreen, the two sheets are pressed together. On these two sheets there are horizontal and vertical lines that, when pushed together, register the precise location of the touch
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Palm Centro
4.22 × 2.11 × 0.73 in (107 × 54 × 18.5 mm)Weight 4.2 oz (119 g)Operating system Palm OS
Palm OS
5.4.9CPU 312 MHz Intel
Intel
XScale
XScale
PXA270Memory 64 MB available user storage, 128 MB available user storage (Revision II)Removable storage microSD up to 4 GB (up to 16 GB with modification)Battery 1150 mAh Lithium-ionDisplay 320×320 65k colors touchscreenRear camera 1.3 megapixels with 2× digital zoomConnectivity EVDO, 1xRTT, Bluetooth, Infrared, USBHearing aid compatibility M4/T4 [1]The Palm Centro
Palm Centro
is a smartphone which has been marketed by Palm, Inc. beginning with its release on October 14, 2007, offering the functionality of the larger Treo 755p in a smaller size.[2] The Centro is one of the last-ever devices to run the Palm OS operating system
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Stylus
A stylus, plural styli or styluses,[1] is a writing utensil or a small tool for some other form of marking or shaping, for example, in pottery. It can also be a computer accessory that is used to assist in navigating or providing more precision when using touchscreens. It usually refers to a narrow elongated staff, similar to a modern ballpoint pen. Many styluses are heavily curved to be held more easily. Another widely used writing tool is the stylus used by blind users in conjunction with the slate for punching out the dots in Braille.[2]Reproduction of a Roman-style wax tablet with three stylusesStyluses were first used by the ancient Mesopotamians in order to write in cuneiform
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Special
Special
Special
or specials may refer to:Contents1 Music 2 Film and television 3 Other uses 4 See alsoMusic[edit] Special
Special
(album), a 1992
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Digital Object Identifier
In computing, a Digital Object Identifier or DOI is a persistent identifier or handle used to uniquely identify objects, standardized by the International Organization for Standardization
International Organization for Standardization
(ISO).[1] An implementation of the Handle System,[2][3] DOIs are in wide use mainly to identify academic, professional, and government information, such as journal articles, research reports and data sets, and official publications though they also have been used to identify other types of information resources, such as commercial videos. A DOI aims to be "resolvable", usually to some form of access to the information object to which the DOI refers. This is achieved by binding the DOI to metadata about the object, such as a URL, indicating where the object can be found. Thus, by being actionable and interoperable, a DOI differs from identifiers such as ISBNs and ISRCs which aim only to uniquely identify their referents
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Pen Computing
Pen
Pen
computing refers to any computer user-interface using a pen (or stylus) and tablet, rather than using devices such as a keyboards, joysticks or a mouse. Pen
Pen
computing is also used to refer to the usage of mobile devices such as wireless tablet PCs, PDAs and GPS receivers. The term has been used to refer to the usage of any product allowing for mobile communication
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List Of Touch-solution Manufacturers
A list of the manufacturers of components that are specific to touch solutions.Contents1 Touchpads1.1 Capacitive 1.2 Resistive2 Touchscreens2.1 Capacitive 2.2 Projected capacitance (PCAP) 2.3 Infrared 2.4 Surface acoustic wave (SAW) 2.5 Bending wave 2.6 Resistive2.6.1 4-wire 2.6.2 5-wire 2.6.3 8-wire 2.6.4 Interpolated Voltage Sensing Matrix (iVSM) 2.6.5 Infrared through the screen 2.6.6 OpticalTouchpads[edit] These manufacturers provide components to touchpads or trackpads. Capacitive[edit]Alps Electric Corporation Cirque SynapticsResistive[edit]InterlinkTouchscreens[edit] Capacitive[edit]3M Alps Electric Corporation Apex Material Technology (AMT) Atmel Cirque Cypress GZ EasyTouch Technology Co. Limited SCHURTER Input Systems Synaptics Touch International TouchNetix Ltd.Projected capacitance (PCAP)[edit]3M Elo TouchSystems GZ EasyTouch Technology Co
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Graphics Tablet
A graphic tablet (also known as a digitizer, drawing tablet, digital drawing tablet, pen tablet, or digital art board) is a computer input device that enables a user to hand-draw images, animations and graphics, with a special pen-like stylus, similar to the way a person draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures. It can also be used to trace an image from a piece of paper which is taped or otherwise secured to the tablet surface. Capturing data in this way, by tracing or entering the corners of linear poly-lines or shapes, is called digitizing.[1] The device consists of a flat surface upon which the user may "draw" or trace an image using the attached stylus, a pen-like drawing apparatus
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Glove
A glove ( Middle English
Middle English
from Old English
Old English
glof) is a garment covering the whole hand. Gloves have separate sheaths or openings for each finger and the thumb; if there is an opening but no (or a short) covering sheath for each finger they are called fingerless gloves. Fingerless gloves having one large opening rather than individual openings for each finger are sometimes called gauntlets, though gauntlets are not necessarily fingerless. Gloves which cover the entire hand or fist but do not have separate finger openings or sheaths are called mittens. Mittens are warmer than other styles of gloves made of the same material because fingers maintain their warmth better when they are in contact with each other
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Dots Per Inch
Dots per inch (DPI, or dpi)[1] is a measure of spatial printing or video or image scanner dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm). Monitors do not have dots, but do have pixels; the closely related concept for monitors and images is pixels per inch or PPI. Many resources, including the Android developer guide, use the terms DPI and PPI interchangeably.Contents1 DPI measurement in printing1.1 DPI or PPI in digital image files2 Computer monitor DPI standards2.1 How Microsoft Windows
Microsoft Windows
handles DPI scaling3 Proposed metrication 4 See also 5 References 6 External linksDPI measurement in printing[edit] DPI is used to describe the resolution number of dots per inch in a digital print and the printing resolution of a hard copy print dot gain, which is the increase in the size of the halftone dots during printing
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Gradient
In mathematics, the gradient is a multi-variable generalization of the derivative. While a derivative can be defined on functions of a single variable, for functions of several variables, the gradient takes its place. The gradient is a vector-valued function, as opposed to a derivative, which is scalar-valued. Like the derivative, the gradient represents the slope of the tangent of the graph of the function. More precisely, the gradient points in the direction of the greatest rate of increase of the function, and its magnitude is the slope of the graph in that direction. The components of the gradient in coordinates are the coefficients of the variables in the equation of the tangent space to the graph
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Voltage
Voltage, electric potential difference, electric pressure or electric tension (formally denoted ∆V or ∆U, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points. The voltage between two points is equal to the work done per unit of charge against a static electric field to move a test charge between two points
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Computer Display
A computer monitor is an output device which displays information in pictorial form. A monitor usually comprises the display device, circuitry, casing, and power supply. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) with LED backlighting having replaced cold-cathode fluorescent lamp (CCFL) backlighting. Older monitors used a cathode ray tube (CRT). Monitors are connected to the computer via VGA, Digital Visual Interface
Digital Visual Interface
(DVI), HDMI, DisplayPort, Thunderbolt, low-voltage differential signaling (LVDS) or other proprietary connectors and signals. Originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality
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Electrical Engineering
Electrical engineering
Electrical engineering
is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism. This field first became an identifiable occupation in the later half of the 19th century after commercialization of the electric telegraph, the telephone, and electric power distribution and use. Subsequently, broadcasting and recording media made electronics part of daily life. The invention of the transistor, and later the integrated circuit, brought down the cost of electronics to the point they can be used in almost any household object. Electrical engineering
Electrical engineering
has now subdivided into a wide range of subfields including electronics, digital computers, computer engineering, power engineering, telecommunications, control systems, robotics, radio-frequency engineering, signal processing, instrumentation, and microelectronics
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Smartphone
A smartphone is a handheld personal computer with a mobile operating system and an integrated mobile broadband cellular network connection for voice, SMS, and Internet
Internet
data communication; most if not all smartphones also support Wi-Fi. Smartphones are typically pocket-sized, as opposed to tablet computers, which are much larger. They are able to run a variety of software components, known as “apps”. Most basic apps (e.g. event calendar, camera, web browser) come pre-installed with the system, while others are available for download from official sources like the Google Play Store
Google Play Store
or Apple App Store. Apps can receive bug fixes and gain additional functionality through software updates; similarly, operating systems are able to update
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Capacitive Sensing
In electrical engineering, capacitive sensing (sometimes capacitance sensing) is a technology, based on capacitive coupling, that can detect and measure anything that is conductive or has a dielectric different from air. Many types of sensors use capacitive sensing, including sensors to detect and measure proximity, position or displacement, humidity, fluid level, and acceleration. Human interface devices based on capacitive sensing, such as trackpads,[1] can replace the computer mouse
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