Large information systems that manage terabytes of data must provide rich functionality so that interesting new applications can be addressed. Since a wealth of data, information and knowledge are resident within thes...
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ISBN:
(纸本)0780399145
Large information systems that manage terabytes of data must provide rich functionality so that interesting new applications can be addressed. Since a wealth of data, information and knowledge are resident within these vast repositories, a variety cg knowledge discovery techniques have developed. These techniques are very computationally intensive and require the movement of large amounts of data. In the search for new approaches, optics may be able to help since photons have the very attractive properties of high speed, non-interference, and parallelism. optical systems can accommodate a large number of parallel, high-bandwidth channels and opticalstorage devices have very high storage densities. In this research we postulate an electrooptical computer architecture and examine the feasibility of executing a number of alphanumeric and image knowledge discovery algorithms on large multimedia data/knowledge bases with the purpose of increasing performance and functionality.
data communication aggregate bandwidth now doubles every 100 days. This transmitted data has origins and destinations, as well as way-stations. At terabit per second channel bandwidth, new optical memory technology ma...
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data communication aggregate bandwidth now doubles every 100 days. This transmitted data has origins and destinations, as well as way-stations. At terabit per second channel bandwidth, new optical memory technology may enhance the capability to launch, buffer, and collect multiplexed data streams in the optical domain. Candidate technologies include soliton fiber-loop and coherent transient memories.
With the terabyte demands of storage in many applications, the improvement of the speed of optical disk, especially the write performance will definitely extend the scope of their applications and enhance the overall ...
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ISBN:
(纸本)0819430234
With the terabyte demands of storage in many applications, the improvement of the speed of optical disk, especially the write performance will definitely extend the scope of their applications and enhance the overall performance of computer system. One effective way to improve the speed is to use a plurality of optical disk drivers together to construct an opticalstorage array similar to Redundant Arrays of Independent Disks (RAID). According to the typical architecture of RAID, the most common fault tolerant RAID architecture is RAID level 1 or RAID level 5. Both are not suitable for opticalstorage array because RAID level 1 architecture has the most redundancy, while the write performance of RAID level 5 architecture is one-fourth of that of RAID level 0 architecture especially for the small-write problem. In this paper, we propose a high performance and high reliability optical disk array architecture with less redundancy, called Mirror Striped Disk Array (MSDA). It is a noval solution to the small write problem for disk array. MSDA stores the original data in two ways, one in a single optical disk and the other in a plurality of optical disks in the way of RAID level 0. The redundancy of whole system is less than RAID level 1 architecture but with the same reliability as RAID level 5. As the performance of RAID level 0 part of opticalstorage system is much higher than that of RAID level 5 in ordinary disk array, thus it avoids the write performance loss when using Mirror Striped Disk Array architecture. Because it omits the parity generation procedure when writing the new data, thus the overall performance of Mirror Striped Disk Array is the same as that of RAID level 0 architecture. Using this architecture, we can achieve the high reliability and high performance opticalstorage system without adding any extra redundancy and without losing any performance compared with RAID level 0 architecture but with the reliability much higher than that of RAID level 5.
Graphical presentation of data to support decision making has a long history, going back to the earliest use of maps and charts. Continued advances in technology have enabled development of a succession of powerful to...
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ISBN:
(纸本)0819427381
Graphical presentation of data to support decision making has a long history, going back to the earliest use of maps and charts. Continued advances in technology have enabled development of a succession of powerful tools to support decision-making, providing visualization of geographically-referenced observations. Early geographic information systems (GIS) were succeeded by powerful (and affordable) systems. Military command and control systems, and air traffic control systems. demonstrated the value of visualization of real-time data in time-critical decision-making. Decision support systems today combine the functions of a GIS and aspects of command and control systems in a powerful and affordable context for real-time decision-making. The REINAS system is presented as a prototype of such a real-time decision-support systems exploiting real-time geographically-referenced measurements.
Tools for accessing, transforming, organizing, and assimilating data and knowledge from multiple heterogeneous, distributed data and knowledge sources in a form that is suitable for further analysis constitute some of...
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ISBN:
(纸本)0780399145
Tools for accessing, transforming, organizing, and assimilating data and knowledge from multiple heterogeneous, distributed data and knowledge sources in a form that is suitable for further analysis constitute some of the key enabling technologies for translating recent advances in automated data acquisition, digital storage, computers and communications into fundamental advances in organizational decision support, data analysis, and related applications. The design, implementation, and evaluation of a data warehouse using object-oriented views and mediator agents for bridging the mismatch between data sources and clients has been a major focus of research as part of the Distributed Knowledge Networks Project at the Iowa State University Artificial Intelligence Research Laboratory over the past two years. This paper describes the design, implementation, and population of a data Warehouse component of Distributed Knowledge Networks.
This Volume 3562 of the conference proceedings contains 33 papers. Topics discussed include opticalstoragetechnology, near-field optical recording, multimedia data repository, electron transfer process, magnetooptic...
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This Volume 3562 of the conference proceedings contains 33 papers. Topics discussed include opticalstoragetechnology, near-field optical recording, multimedia data repository, electron transfer process, magnetooptic enhancement, magnetooptical read channel,optical recording and digital video.
optical signal processing, traditionally employed in the spatial domain, has been experiencing a renaissance with femtosecond laser pulse technology. Temporal optical information can now be manipulated via linear and ...
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ISBN:
(纸本)0819429252
optical signal processing, traditionally employed in the spatial domain, has been experiencing a renaissance with femtosecond laser pulse technology. Temporal optical information can now be manipulated via linear and nonlinear processes, and stored and retrieved, by converting optical signals between the spatial and temporal domains. In this manuscript, we review the state-of-the-art in the spatio-temporal optical signal processing techniques for information data coding, data conversion, signal recording, as well as signal characterization. Applications of these techniques for future computing, communication, storage, and signal processing systems are discussed.
Chemically amplified (CA) resist systems are known to be sensitive to contamination. Environmental contaminants such as airborne amines can result in T-topping. In addition, the undesired diffusion of photogenerated a...
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ISBN:
(纸本)0819427780
Chemically amplified (CA) resist systems are known to be sensitive to contamination. Environmental contaminants such as airborne amines can result in T-topping. In addition, the undesired diffusion of photogenerated acid into unexposed areas can result in linewidth slimming. To counteract these effects,, amines are intentionally added to chemically amplified resist formulations. These added amines function as "buffers" or "acid traps" within the resist matrix. While the effects of strong, photogenerated acids on CA resist systems has been the focus of much research, the effects of weaker acids on these resist systems has not received as much attention. In this paper we demonstrate how the conjugate acid of some amines (amine salts) can adversely effect the lithographic performance and storage stability of CA systems. We show that salts of weak amines are sufficiently acidic at relatively low temperatures, to cause significant increases in polymer molecular weight and polydispersity. In some cases, gelation of the polymer matrix was observed. A mechanism is proposed to explain these effects. We also show how appropriate amines can provide a thermally stable salt with low acidity. Such amine additives not only improve the storage stability of the resist system but also significantly improve lithographic performance as well.
Magnetic tape recording for datastorage is reviewed with respect to the rapidly advancing areal density of recorded data on tape. The key to the advances lies primarily in the ability of heads and media to support th...
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Magnetic tape recording for datastorage is reviewed with respect to the rapidly advancing areal density of recorded data on tape. The key to the advances lies primarily in the ability of heads and media to support this growth, coupled with a move to active track following servo control and advanced recording channels. Multi-element magnetic head devices in the form of arrays of thin film record (write) heads using high moment soft magnetic materials and multi-layer magneto-resistive (MR) readback devices are emphasized.
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