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 20 for “"Hard Disk Drive"”.
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Innovation incentives and competition in the hard disk drive industry
Firms in the hard disk drive industry are continually engaging in R & D and improving the quality of their products. We explore various determinants of the product innovation incentives for firms concerned with both their static and expected future profitability. We estimate the observed innovation …
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The reduction of acoustic noise emissions from a hard disk drive
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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A digital phase-locked loop for hard disk drive read channel appliations
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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The role of heat assisted magnetic recording in future hard disk drive applications
(cont.) portable consumer electronics, such as PDAs, cell phones, music players, digital cameras, etc. make a relatively modest but fast growing market for ultrahigh areal density HAMR-based HDDs. HAMR-based HDD for portable applications could very well be a disruptive technology in the magnetic …
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Low-temperature magnetic force microscopy with a simple design: analyzing the magnetic domains of a simple hard disk drive
… investigation on a simple memory storage disk. Scanning probe microscopy (SPM) was first developed to study various electronic properties of different materials, such as imaging high T [subscript c] superconductors. Soon after, the SPM grew and expanded in terms of techniques and …
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Software for efficient file elimination in computer forensics investigations
… forensics analysis process for files on a hard disk drive under investigation. A software tool has been developed to dramatically reduce the number of files that an investigator must individually examine. This tool utilizes the National Institute of Standards and Technology (NIST) National …
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High frequency sonar components of normal and hearing impaired dolphins
… sonar signals and digitally store them to a PC hard drive. The device had the capability of capturing sonar signals by means of a two-hydrophone array, and a digital video camera in a submersible housing. Cooperation with marine biologists at SSC San Diego enabled the sampling of three animals …
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A Carrier-Pigeon UAS for South Pole Data Transfer
… support characteristics, and payload—to support hardware-based data transfer from South Pole Station in Antarctica to a location of high connectivity has been undertaken. Due to the specific location of the Amundsen-Scott South Pole station and competing demands from other governmental agencies, …
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ClusterRAID: Architecture and Prototype of a Distributed Fault-Tolerant Mass Storage System for Clusters
… presented system is the conversion of the local hard disk drive of a cluster node into a reliable device while preserving the block device interface. By the deployment of sophisticated erasure-correcting codes, the system allows the adjustment of the number of tolerable failures and thus the …
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Temperature Dependent Robust Control Of Hard Disk Drives Using Parameter Varying Techniques
A hard disk drive (HDD) is a device that stores digital data by writing and reading magnetic signals onto a disk using a magnetic transducer. The data is organized into circular tracks that are less than 100 nm wide. Modern HDDs use a dual-state actuator to position the transducer onto these …
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High moment shield structures for improved linear density capability in thin film recording heads
An essential part of Hard Disk Drive (HDD) Areal Density Capability (ADC) growth is improving the linear resolution of the reader. Increasing reader shield saturation magnetisation is an attractive means to enable this as dynamic permeability would be expected to improve, thereby providing greater …
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Design of silicon-containing block copolymer materials for applications in lithography
… for semiconductor patterning, and the other for hard disk drive applications.
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Methods of improving the surface flatness of thin glass sheets and silicon wafers
… applications utilize sheet glass, such as the hard disk drive industry for making platters, the x-ray telescope industry for making high precision optics, and the semiconductor industry for making masks and substrates. The exceptional optical qualities of sheet glass give them a leading …
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Molecularly thin rheological and contact interfaces
… is important, for example, in the head-disk contact in magnetic storage hard disk drives to ensure that some of the contact is sustained by the lubricant layer and thus avoiding damage of the solid surfaces. The magnitude of the normal and tangential bearing forces that the lubricant …
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Direct Back EMF Detection Method for Sensorless Brushless DC (BLDC) Motor Drives
Brushlesss dc (BLDC) motors and their drives are penetrating the market of home appliances, HVAC industry, and automotive applications in recent years because of their high efficiency, silent operation, compact form, reliability, and low maintenance. Traditionally, BLDC motors are commutated in …
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Micromagnetic Study of Composite Media for High Density Heat Assisted Magnetic Recording
The hard disk drive industry is a market with around 25 billion revenue each year. The annual average areal density growth rate is about 40% before 2012. With cloud computing and storage technology emerge, hard disk drives with high area density and low price are required. However, the areal …
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Physical phenomena of thin surface layers
… highly desirable due to their potential use in hard-disk drive technologies. Thin films can be used to influence the optical signature of a material and are widely used in nature to produce vibrant, pure, iridescent colours. Here the optical properties of the tropical plant Selaginella willdenowii …
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An Investigation of the Feasibility of Microscale Adaptive Passive Vibration Neutralizers
… neutralizers is vibration control in computer hard drives. A hard drive is analyzed for vibration problems. Included are plots of the velocities of the read-write head and spindle. Limitations of the measurement equipment are discussed, and directions for future work on small-scale tunable …
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Dynamic and quasi-static contact and scratch analysis of micro-nanoscale thin solid films with application to magnetic storage hard disk drives
… contact and scratch of the slider and disk in magnetic storage hard disk drives (HDD). Similar contact problems are encountered during the operation of other micromechanical systems like RF-MEMS switches where surface damage is observed after cyclic contact. One of the most critical …