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Title | Description | Subject | Date |
126 |
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A framework for hardware design analysis and synthesis using VHDL | An approach for behavioral analysis and synthesis in a single framework is presented. The main advantage of specifying circuits at an abstract level is that they become amenable to formal analysis. A formalism HOP, which is an extended automaton model to describe behaviors of circuits is introduced.... | VHDL; computer hardware description language | 1993-03 |
127 |
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Accurate capacitance and resistance extraction | A novel approach to solving the accurate capacitance and resistance extraction problem in integrated circuits is presented as a combination of a custom language and a kit of circuit analysis primitives. This approach is targeted toward the analysis of circuit interconnect and the determination of fr... | integrated circuits; electric resistance | 1993-03 |
128 |
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Constraints as a Paradigm for Computing | This dissertation presents a multiple domain constraint logic programming system (MDCLP) in which multiple solvers are supported and are viewed as external modules interfaced to the logic programming system through the set of constructors and predicates they support. The concept of separately compil... | logic programming; constraint logic programming; clp; logic programming language; programming language; warren abstract machine; type inference | 1993-03 |
129 |
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Interactive volume visualization | The purpose of scientific computation is insight. Visualization is the most direct way to bring out and deliver insight. The advances of technology have allowed scientists to simulate or observe our physical world at a much higher resolution than was available previously. As a result, large-scale nu... | computer graphics; volume visualization | 1993-06 |
130 |
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An Empirical Study of Persistent Object Stores | Persistent object stores support the creation, manipulation, storage, and retrieval of objects. Other desirable features of persistent stores are protection, transaction management, version control and concurrency control. Due to a lack of complete understanding of the demands of applications, there... | persistent object stores; CAGD; Alpha_1; ESM; Postgres; data clustering; object identifier | 1993-06 |
131 |
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Persistent Immutable Shared Abstractions for Concurrent Scheme | A write-once, read-many persistent store has been developed for Concurrent Scheme, a distributed-memory parallel Lisp for the Mayfly multicomputer. The prototype implementation supports the explicit store, and implicit retrieval, of instances of the Scheme data types. Items are stored into per node ... | concurrent scheme; lisp, mayfly; multicomputer; persistent store; ray tracer | 1994 |
132 |
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Fixed Point Computation and Parallel Algorithms for Solving Wave Equations | This dissertation is concerned with two problems: fixed-point computation and parallel algorithms for solving wave equations. Many problems can be formulated as fixed-point problems, which is to solve the equations of the form f(x) - x = 0. We develop efficient algorithms and establish complexity re... | fixed point computation; parallel algorithm; fixed point envelope; fixed point ellipsoid; wave equation; processor array; transputer; linear array | 1994 |
133 |
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Design of a Self-Timed, Pipelined, Floating Point Multiplier in Gallium Arsenide | This thesis presents the design of a self-timed, floating point multiplier in Gallium Arsenide (GaAs) technology. It implements the Institute of Electrical and Electronic Engineers (IEEE) single precision standard. Self-timed design methodology offers some advantages over a synchronous approach, esp... | gallium arsenide; floating point multiplier; GaAs; GaAs technology | 1994-06 |
134 |
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A pipelined architecture for ray tracing | Ray tracing is a computer graphics rendering algorithm well known for the realistic images that it generates. Its primary drawback is the huge amount of computation required for even moderately complex scenes. Pipelined architectures have been used for many years to accelerate conventional scan conv... | computer architecture; computers; pipeline; computer graphics; RayPipe | 1994-06 |
135 |
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Sketching with constraints | The goal of this thesis is to provide a simple and intuitive user interface to a Computer Aided Design (CAD) system. A simple modeling system was built to demonstrate the utility of the ideas presented here. There are three main parts to this system. The first part is the interpretation of sketched ... | user interfaces; computer systems; computer-aided design; CAD system | 1994-06 |
136 |
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Parallel Distributed Simulation of Elastic Waves | A parallel distributed algorithm to simulate the propagation of waves through elastic media is presented and tested. The algorithm is based on a fourth-order finite difference solution of the elastic wave equation in three dimensions and incorporates a staggered grid formulation to solve for the di... | computers; computer programming; algorithm; elastic media; parallel distributed algorithm; fourth-order finite difference solution | 1994-07 |
137 |
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UCL+P - a persistent common lisp | The Persistent Lisp language was defined and an implementation, UCL+P,1 was designed and constructed. Persistent · Lisp is a superset of Common Lisp which fully supports the development of programs manipulating persistent data , while maintaining Lisp semantics across the storage/retrieval of value... | computer language; Lisp, | 1994-08 |
138 |
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An asynchronous floating point unit | An asynchronous floating point unit (FPU) was designed using application specific integrated circuit (ASIC) and very large scale integration (VLSI) technologies. The FPU is capable of adding, subtracting, multiplying, and dividing single-precision format numbers as defined by The Institute of Electr... | computer circuits; asynchronous circuits; floating-point arithmetic | 1994-08 |
139 |
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Automated Detection of Delirium | This dissertation developed computerized decision support for the recognition of delirium, a condition resulting in high morbidity and cost. The decision support required the development of pen-based graphical user interfaces and client server databases for nursing data and clinical studies, the exe... | delirium; dhcp; graphical user interface | 1994-12 |
140 |
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Z [infinity] : a framework for reactive autonomous agent specification and analysis | We propose a framework for the specification and analysis of autonomous agents. In general, such agents require several levels of behavioral specifications, including low-level reflex actions, midlevel controllers to deal with the physical aspects of the world, and high-level representations for goa... | robots; control systems; real-time programming languages; graphical interactive tools; robotic systems | 1994-12 |
141 |
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Design and implementation of a portable shared memory server | Processes communicate between one another using mechanisms like message passing, files, shared memory, etc. In current systems, shared memory is not commonly used even though it has many advantages over message passing and file sharing such as simplicity, efficiency, and lower space overhead. This t... | memory management; portable shared memory server | 1994-12 |
142 |
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Feature-based reverse engineering | Reverse engineering entails building a representation of an engineered object using only information derived from an instance of that object. This research has focused on the reverse engineering of physical objects, specifically machined parts. Reverse engineering differs from many other sensing pro... | reverse engineering | 1994-12 |
143 |
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Simulation of numerically controlled milling machines | This thesis describes a system that can be used to simulate both 3 and 5-axis NC milling toolpaths, reading BCL code. This simulator is based on the imagespace approach in which the workpiece is represented using the z-values resulting from the rendering of a model and metal removal is achieved thro... | NC milling; numerical control; computers | 1995-03 |
144 |
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E-MO : a system for automatically generating emotive-motions | A system is developed to automatically generate control functions for linked mechanisms that express specific emotions. This system could be employed to produce motions for characters in a computer animation. It takes advantage of the fact that evaluation functions, which take physical characteristi... | | 1995-03 |
145 |
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The A3000: An asynchronous version of the R3000 | This thesis presents the architectural design and implementation of an N-stage Self-Timed RISC processor based on a subset of the MIPS R3000. The goal is to lay the ground work to show it will be possible in the future to build an asynchoronous pipelined RISC processor that has the chance to to comm... | A3000; asynchronous; computers | 1995-03 |
146 |
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Parallel solution of Poisson's problems on irregular domain. | This thesis is devoted to the solution of the Poisson problem on an irregular domain applying parallel computation techniques on distributed memory machines. | Poisson problem; computers | 1995-06 |
147 |
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The use of inverse rendering in lighting design | This dissertation presents an inverse rendering approach for designing the illumination in an environment using optimization techniques applied to a radiosity based image synthesis system. | image synthesis system; radiosity; inverse rendering; designing illumination; computers; radioptimization | 1995-06 |
148 |
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Matte volumes for selective data visualization | The matte volumes system uses a volume renderer, surface renderer, and slice viewer for the exploration and visualization of three-dimensional scalar field data. The size and complexity of the volume data pose an interesting challenge to the ideal of providing the scientist with a system which autom... | matte volumes; three-dimensional scalar field data; computers; matte volumes system | 1995-08 |
149 |
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The dynamic expansion of class hierarchy | This dissertation focuses on dynamic expansion of the class hierarchy of programs written in the C++ programming language. | C++; dynamic expansion; program class hierarchy; computers | 1995-08 |
150 |
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Feature-based reverse engineering of mechanical parts: revision | Reverse engineering of mechanical parts requires extraction of information about an instance of a particular part sufficient to replicate the part using appropriate manufacturing techniques. This is important in a wide variety of situations, since functional CAD models are often unavailable or unusa... | | 1995-11-06 |