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Author: Vasu Kanekal
Publisher:
ISBN: 9781303211997
Category :
Languages : en
Pages : 64
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Book Description
The purpose of this study is to determine whether or not the data written on a modern high-density hard disk drive can be recovered via magnetic force microscopy of the disks' surface. To this end, a variety of image processing techniques are utilized to process the raw images into a readily usable form, and subsequently, a simulated read channel is designed to produce an estimate of the raw data corresponding to the magnetization pattern written on the disk. Using a specially prepared hard disk drive, the performance of this process is analyzed and techniques to improve it are investigated. Finally, some interesting results about maximal length shift register sequences are presented.
Author: Vasu Kanekal
Publisher:
ISBN: 9781303211997
Category :
Languages : en
Pages : 64
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Book Description
The purpose of this study is to determine whether or not the data written on a modern high-density hard disk drive can be recovered via magnetic force microscopy of the disks' surface. To this end, a variety of image processing techniques are utilized to process the raw images into a readily usable form, and subsequently, a simulated read channel is designed to produce an estimate of the raw data corresponding to the magnetization pattern written on the disk. Using a specially prepared hard disk drive, the performance of this process is analyzed and techniques to improve it are investigated. Finally, some interesting results about maximal length shift register sequences are presented.
Author: Isaak D. Mayergoyz
Publisher: Elsevier
ISBN: 0080467520
Category : Technology & Engineering
Languages : en
Pages : 239
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Book Description
This book provides an in-depth exposition of spin-stand microscopy of hard disk data which is a new technique recently developed and extensively tested by the authors of the book. Spin-stand microscopy is the first magnetic imaging technique where imaging is performed ex-situ on a rotating disk mounted on a spin-stand. This technique is one of the fastest scanning-based microscopy techniques. It is non-invasive and has nano-scale resolution. For these reasons, it provides unique capabilities for the visualization of magnetization patterns recorded on hard disks. This book is self-contained and it covers in sufficient details the basic facts of magnetic data storage technology, the principles and theory of spin-stand microscopy, its experimental implementations, as well as its applications in hard disk diagnostics, imaging of overwritten patterns, computer forensics of hard disk files, and data-dependent magnetic thermal relaxations of recorded magnetization patterns. This book will be a valuable reference for the magnetic data storage community, magnetic microscopy professionals as well as engineers and scientists involved in computer data forensics, commercial data recovery, and the design of archival data storage systems. - Conceptual novelty of the technique and the demonstration of its wide scope of applications - Detailed exposition of the principles of spin-stand magnetic microscopy - Comprehensive discussions of novel image reconstruction techniques - Demonstration of high resolution spin-stand images of hard disk data - Presentation of sector-by-sector ex-situ forensics of hard disk files - Extensive studies of data-dependent thermal relaxations of magnetization patterns recorded on hard disks
Author: Rajiv Madabhushi
Publisher:
ISBN:
Category : Magnetic recorders and recording
Languages : en
Pages : 244
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Book Description
Author: Terry R. Ferrett
Publisher:
ISBN:
Category : Fourier analysis
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
This report covers work performed on two-dimensional and three-dimensional reconstruction of magnetic images derived from synthetic data sets of a model magnetic-resonance force microscope. Specifically, Pixon LLC has employed its proprietary Pixon-method image reconstruction algorithm in order to perform the reconstructions. We find that the algorithm yields excellent results, in particular as regards image accuracy, resolution, and suppression of noise. A specific and robust regimen for performing the reconstructions within the Pixon-method paradigm has been developed. The regimen is robust against varying signal-to-noise ratio and varying tip-to-sample separation in the MRFM instrument model. Moreover, a data-capture scanning strategy has been discovered that optimizes performance of the reconstruction (resolution and sensitivity) while simultaneously minimizing the data acquisition time. These results should make straightforward the application of the algorithm in a real-world instrument. The results also favor adaptation of Pixon- method image reconstruction techniques to three-dimensional imaging with conventional magnetic-force microscopes.
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 778
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Book Description
Author: Albrecht Jander
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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Author: Chi-Chun Hsu
Publisher:
ISBN:
Category : Finance
Languages : en
Pages : 172
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Book Description
Author: Yung-Ping Yeh
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Book Description
Author: Yijun Man
Publisher:
ISBN:
Category : Atomic force microscopy
Languages : en
Pages : 270
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Book Description
