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Full-Text Articles in Physical Sciences and Mathematics
Mri On The Fly: Accelerating Mri Imaging Using Lda Classification With Ldb Feature Extraction, Y Joy Ko, Michael B. Taylor
Mri On The Fly: Accelerating Mri Imaging Using Lda Classification With Ldb Feature Extraction, Y Joy Ko, Michael B. Taylor
Dartmouth College Undergraduate Theses
To improve MRI acquisition time, we explored the uses of linear discriminant analysis (LDA), and local discriminant bases (LDB) for the task of classifying MRI images using a minimal set of signal acquisitions. Our algorithm has both off-line and on-line components. The off-line component uses the k-basis algorithm to partition a set of training images (all from a particular region of a patient) into classes. For each class, we find a basis by applying the best basis algorithm on the images in that class. We keep these bases to be used by the on-line process. We then apply LDB to …
The Panda Array I/O Library On The Galley Parallel File System, Joel T. Thomas
The Panda Array I/O Library On The Galley Parallel File System, Joel T. Thomas
Dartmouth College Undergraduate Theses
The Panda Array I/O library, created at the University of Illinois, Urbana-Champaign, was built especially to address the needs of high-performance scientific applications. I/O has been one of the most frustrating bottlenecks to high performance for quite some time, and the Panda project is an attempt to ameliorate this problem while still providing the user with a simple, high-level interface. The Galley File System, with its hierarchical structure of files and strided requests, is another attempt at addressing the performance problem. My project was to redesign the Panda Array library for use on the Galley file system. This project involved …
Object Oriented Scenes For Virtual Light, Jonathan A. Moore
Object Oriented Scenes For Virtual Light, Jonathan A. Moore
Dartmouth College Undergraduate Theses
Ray tracing is one of many way to use a computer to generate an image. Ray tracers produce images by simulating light. Eliminating the details that might distract one from the interesting parts of ray tracing algorithms was purpose of my thesis project. The software I have written can be divide into three parts: the virtual frame buffer, the support classes and the ray tracing abstract base classes. The virtual frame buffer class, vfb, provides a simple means of rendering and studying the final image produced by a graphical algorithm. The support classes provide an elegant notation for the equations …
Implementation And Analysis Of Software Based Fault Isolation, Scott M. Silver
Implementation And Analysis Of Software Based Fault Isolation, Scott M. Silver
Dartmouth College Undergraduate Theses
Extensible applications rely upon user-supplied, untrusted modules to extend their functionality. To remain reliable, applications must isolate themselves from user modules. One method places each user module in a separate address space (process), which uses hardware virtual memory support to isolate the user process. Costly inter-process communication, however, prohibits frequent communication between the application and the untrusted module. We implemented and analyzed a software method for isolating an application from user modules. The technique uses a single address space. We provide a logical address space and per-module access to system resources for each module. Our software technique is a two-step …
Segmenting Workstation Screen Images, Denis M. Serenyi
Segmenting Workstation Screen Images, Denis M. Serenyi
Dartmouth College Undergraduate Theses
No abstract provided.