Data Storage Systems Introduction The astounding volume of data being transmitted between systems today has created an obvious need for data management. As a result, more servers—whether they are PCs, UNIX workstations, minicomputers, or supercomputers—have assumed the role of information providers and managers. The number of networked or connectable systems is increasing by leaps and […]
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Posts by Farahat
Magnetographic and Ionographic Technologies and System Issues : Color Management
Magnetographic and Ionographic Technologies These two technologies are toner based but utilize different addressing and writing media. The photoconductor is replaced by a thin magnetizable medium or hard dielectric layer, such as anodized aluminum, which is used in ionographic printers. Magnetographic printers employ a printhead that produces magnetic flux transitions in the magnetizable media by […]
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Electrophotographic Printing Technology : Printing Process Steps and Dot Microstructure
Electrophotographic Printing Technology Electrophotography is a well established and versatile printing technology. Its first application was in 1960 when it was embodied in an office copier. The process itself bears a strong resemblance to offset lithography. The role of the printing plate is played by a cylindrical drum or belt coated with a photoconductor (PC) […]
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Thermal Printing Technologies : Direct Thermal , Direct Thermal Transfer , Dye Diffusion Thermal Transfer and Resistive Ribbon Thermal Transfer
Thermal Printing Technologies Printing technologies that employ the controlled application of thermal energy via a contacting printhead to activate either physical or chemical image formation processes come under this general classification. There are four thermal technologies in current use: direct thermal, direct thermal transfer, dye diffusion thermal transfer, and resistive ribbon thermal transfer. Direct Thermal […]
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Nonimpact Printing Technologies :Ink Jet , Continuous Ink Jet , Drop On Demand (DOD) Ink Jet , Thermal Ink Jet/Bubble Jet DOD Printers , Piezoelectric DOD Printers , Grayscale Methods for DOD Ink Jet Printers , Ink and Paper for Ink Jet Devices
Nonimpact Printing Technologies Ink Jet The transfer process of ink jet printing is one of removing a drop of liquid ink from the bulk and giving it a velocity of sufficient precision and magnitude to place it on a substrate in close proximity to but not touching the printhead. There are three broad techniques: continuous, […]
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Printing Technologies
Printing Technologies The four basic elements of any printing technology are: addressing, marking substance and its storage and delivery, transfer of the marking substance, and fixing. Addressing refers to the communication of electronic data to the marking unit, typically via electronic or optical means. The marking substance contains the colorant, vehicle/carrier material for transport, binders […]
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Introduction to Printing Technologies,Resolution and Addressability,Grayscale and Dot Microstructure
Introduction The basic parameters of print quality are resolution, addressability, gray scale, and dot microstructure. A real device also has intrinsic variability in the printing process, producing visual artifacts, which come under the general heading of noise. Some of the more common manifestations of this are background scatter, dot placement errors, voids (due to nozzle […]
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Test On Digital Electronics Applications
Test On Digital Electronics Applications Do not refer to the text when taking this test. You may draw diagrams or use a calculator if necessary. A good score is at least 38 correct answers. Answers are in the back of the book. It’s best to have a friend check your score the first time so […]
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PC Interfacing Basics :Synchronous Serial Interfaces (SPI, I2C, Microwire) ,Asynchronous Serial Interfaces and RS-232 Electrical Standards
Synchronous Serial Interfaces (SPI, I2C, Microwire) There are two very common synchronous data protocols, Microwire and SPI, from which a variety of standard devices (memory and peripheral functions) have been designed around, including serial EEPROMs, sensors and other I/O functions. I consider these protocols to be methods of transferring synchronous serial data rather than intelligent […]
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PC Interfacing Basics : The Parallel (Printer) Port and Video Output
PC Interfacing Basics From a practical point of view, chances are you will be designing an interface or enhancement to your PC. Most modern commercial devices utilize USB ports, but you can still do a lot of interesting projects with the ‘‘legacy’’ interfaces built into the PC. Along with this, a basic understanding of your […]
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