Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1220 for “"disk"”.
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Studies of disk arrays tolerating two disk failures and a proposal for a heterogeneous disk array
… access to these data is made possible by large disk arrays, especially in the RAID (Redundant Array of Independent Disks) paradigm. According to the RAID level a disk array can tolerate one or more disk failures, so that the storage subsystem can continue operating with disk failure(s). RAID 5 …
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The Rowland disk.
Thesis: B.S., Massachusetts Institute of Technology, Department of Physics, 1970
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On-Disk Sequence Cache (ODSC): Using Excess Disk Capacity to Increase Performance
<p>We present an on-disk sequence cache (ODSC), which improves disk drive performance. An ODSC uses a separate disk partition to store disk data in the order that the operating system requests it. Storing data in this order reduces the amount of seeking that the disk drive must do. As a result, the …
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Disk Based Model Checking
<p>Disk based model checking does not receive much attention in the model checking field becasue of its costly time overhead. In this thesis, we present a new disk based algorithm that can get close to or faster verification speed than a RAM based algorithm that has enough memory to complete its …
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Disk type electrostatic generator
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1937.
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The expandable network disk
This thesis presents a virtual disk cluster called END, the Expandable Network Disk. END aggregates storage on a cluster of servers into a single virtual disk. END's main goals are to offer good performance during normal operation, and efficiently handle changes in the cluster membership. END …
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Describing protostellar disk structure in Ophiuchus
Young forming stars host circumstellar disks of dust and gas. High-resolution, millimeter observations of disks at the protoplanetary stage reveal substructures such as gaps, rings, arcs, spirals, and cavities. These structures are often attributed to disturbances from young, newly formed planets …
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A Study of Disk Performance Optimization.
… slowest component of the I/O subsystem is the disk drive.</p> <p>One standard strategy for improving I/O subsystem performance uses high-performance hardware like Small Computer Systems Interface (SCSI) drives to improve overall response time. SCSI hardware, unfortunately, is often too …
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Quantum dot based semiconductor disk lasers
… semiconductor lasers (OPSLs) or semiconductor disk lasers (SDLs) realized an important feature in semiconductor based lasers – high multi- Watt output power was combined with diffraction limited output beam profile.This work is devoted to the development of semiconductor disk lasers based on …
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Actuator Disk Theory for Compressible Flow
… of propellers and turbines, the Actuator Disk Theory or Froude’s Momentum Theory was established for compressible, subsonic flow using the three laws of conservation and isentropic thermodynamics. The compressible Actuator Disk Theory was established for the unducted (bare) and ducted …
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Flow Near an Enclosed Rotating Disk
Made available in DSpace on 2014-12-08T23:18:31Z (GMT). No. of bitstreams: 1 7013519.pdf: 5582652 bytes, checksum: ee1dc1e7c07a149411dedcf345ca01fe (MD5) Previous issue date: 1969
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Raytheon PB 440 disk interface design
… designed to couple the Magnafile 8502 disk storage unit to the Raytheon PB 440 computer. The computer can use the disk for both data storage and recovery. However, data must be exchanged in blocks of 1024 words (one complete track on the disk). The interfacing was designed incorporating …
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Designing Compact On-Disk Index Data Structures
… depends on its storage engine. The design of on-disk index data structure is critical to the storage engine performance. Many database systems have chosen B+-trees as the on-disk index data structure. A B+-tree organizes every internal node in a block of the I/O unit so that the reads would incur …
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The Universal Rotation Curve of Disk Galaxies
… that can predict the rotation curve (RC) of any disk galaxy and, through the relations used to define it, directly correlate stellar properties to dark halo parameters. By examining these dark-luminous relations for different galaxy morphologies, we can study how dark halo shapes change with …
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The Andromeda Optical and Infrared Disk Survey
… We present the Andromeda Optical and Infrared Disk Survey (ANDROIDS), which adds new near-UV to near-IR (ugriJKs) imaging using the MegaCam and WIRCam cameras at the Canada-France-Hawaii telescope to the available M31 panchromatic dataset. To accurately subtract photometric background from our …
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Scheduling policies for disks and disk arrays
… technology have enabled substantial increases in disk capacity. There has been less than 10% improvement annually in the random access time to small data blocks on the disk. Such accesses are very common in OLTP applications, which tend to have stringent response time requirements. Scheduling of …
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Adaptive Disk Striping for Parallel Input/output
… analytical model in estimating and explaining disk striping performance. Also, experiments with artificial benchmarks and scientific applications showed that, depending on the access pattern, adaptive striping can significantly improve input/output performance compared to striping with fixed …
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