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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Computer Systems
Printing Technologies and Systems : Introduction, Printing Technologies and Nonimpact Printing Technologies.
19.8 Printing Technologies and Systems 19.8.1 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 […]
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Network Communication: Wide Area Networks.
Wide Area Networks Applications Wide Area Network Architecture To better understand all of the current and emerging wide area networking technologies and services, a simple model defining the major segments and interrelationships of an overall wide area network architecture is shown in Fig. 19.64. User demands are the driving force behind the current and emerging […]
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Network Communication: Internetworking.
Internetworking Applications: What Can Internetworking Do for You? It is nearly inevitable that sooner or later nearly any organization will need to share information across multiple information platforms or architectures. This sharing may be between LANs that may differ in net- work architecture or network operating systems. Information systems that combine multiple computing platforms or […]
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Network Communication: Local Area Networks.
Local Area Networks LAN Applications Possible business analysis questions for local area networking solutions are listed in Fig. 19.59. This list of business analysis questions is not meant to be exhaustive or all encompassing. Two important things to remember about any list of business analysis questions are 1. The questions should dig deeper into the […]
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Network Communication: General Principles of Network Analysis and Design and Personal Remote Connectivity.
19.7 Network Communication 19.7.1 General Principles of Network Analysis and Design Use of Top-Down Business Oriented Approach Network communication is the transport of data, voice, video, image, or facsimile (fax) from one location to another achieved by compatibly combining elements of hardware, software, and media. From a business perspective, network communications is delivering the right […]
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Ad Hoc Networks : TCP over Ad Hoc Networks and Capacity of Ad Hoc Networks.
19.6.4 TCP over Ad Hoc Networks TCP is the prevalent transport protocol in the Internet today and its use over ad hoc networks is a certainty. This has motivated a great deal of research efforts aiming not only at evaluating TCP performance over ad hoc networks, but also at proposing appropriate TCP schemes for this […]
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Ad Hoc Networks : Medium Access Protocols.
19.6.1 Medium Access Protocols Medium access control (MAC) for wireless ad hoc networks is currently a very active research topic. The characteristics of the network, the diverse physical-layer technologies available, and the range of services envisioned render a difficult task the design of an algorithm to discipline the access to the shared medium that results […]
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Ad Hoc Networks : Introduction and Routing Algorithms
19.6 Ad Hoc Networks 19.6.1 Introduction An ad hoc network is a wireless network that is established without the aid of infrastructure or centralized administration. It is formed by a group of wireless terminals (nodes) such that a communication between any two terminals is carried out by means of a store-and-relay mechanism. A terminal wishing […]
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Brief Survey of Speech Enhancemen : Multiple State Speech Model, Second-Order Statistics Estimation and Concluding Remarks.
19.5.1 Multiple State Speech Model All estimators presented in Section 19.5.2 and Section 19.5.3 make the implicit assumption that the speech signal is always present in the noisy signal. In the notation of Section 19.5.2, Z = Y + W. Since the length of a frame is relatively short, in the order of 30 − […]
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