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Full-Text Articles in Physical Sciences and Mathematics
Computer Vision: Object Recognition, Michael Zalokar '00
Computer Vision: Object Recognition, Michael Zalokar '00
Honors Projects
One of the growing fields in computer science is that of Artificial Intelligence or AI. Many theories have evolved to make a computer intelligent and so far no one has succeeded (Dreyfus 1992). One of the methods used by the Shelley Project in the past has been to use a back propagation neural network that is the backbone of the GNU Neural Network Visualizer (GNNV). GNNV uses a neural network to try to identify known objects, like faces, in the field of view. A different method, that is the focus of this research, is to identify objects in the image. …
Lasalle's Invariance Principle On Measure Chains, Anders Floor '00
Lasalle's Invariance Principle On Measure Chains, Anders Floor '00
Honors Projects
It was in 1892 that Lyapunov published his paper giving his "second method". The basic guiding principle was that we might be able to know something about the stability of the system from the form of the equations describing it. Specifically, the idea was that it would not be necessary to know the solutions of the equations involved. This is of course very useful since in most cases solutions are extremely difficult or even impossible to find. Lyapunov's insight was that if a function could be found with, among other properties, a negative rate of change along the solution of …
A Study Of The Solvolysis Reactions Of Tetrahydrofurfuryl Tosylate, Rebecca Centko '00
A Study Of The Solvolysis Reactions Of Tetrahydrofurfuryl Tosylate, Rebecca Centko '00
Honors Projects
The solvolysis of epoxycarbinyl substrates 1 has been the subject of several mechanistic studies. In spite of these investigations, it has not been established whether these solvolysis reactions proceed with anchimeric assistance from the epoxide oxygen and involve an oxabicyclobutonium ion intermediate or whether unassisted solvolysis occurs. Conflicting data in the literature suggest that the ability of the epoxide oxygen to provide anchimeric assistance is dependant upon structural and electronic features of the epoxycarbinyl substrate in question. The aim of this project was to study the nucleophilic substitution reactions of tetrahydrofurfuryl and tetrahydropyranyl sulfonates 2a and 2b as well as …
A Systematic Study Of The Correlations Between Meteorite Impacts And Soot Formation, Susanna L. Widicus '00
A Systematic Study Of The Correlations Between Meteorite Impacts And Soot Formation, Susanna L. Widicus '00
Honors Projects
A massive extinction of more than 50 percent of existing life forms on Earth occurred 65 million years (Ma) ago. This event is marked in the geological record by the Cretaceous-Tertiary (KT) boundary and corresponds to the Chicxulub meteorite impact in the Yucatan Peninsula. Since 1985, large quantities ofreduced elemental carbon in the form of characteristic spheroidal clusters of soot have been found in twelve KT boundary sites from across the globe. Because ofthe wide geographic distribution ofthese sites, the data was interpreted to indicate that deposition ofsoot was a global phenomenon. The source of this global soot layer is …
Holographic Optical Tweezers: Development And Analysis Of The First Holodeck Prototype, Matthew T. Dearing '00
Holographic Optical Tweezers: Development And Analysis Of The First Holodeck Prototype, Matthew T. Dearing '00
Honors Projects
Tightly focused light can be used to non-invasively trap and manipulate micro-objects, a technique called "optical tweezing." By utilizing the large field gradients present in a focused laser beam, micro-particles-including biological specimens and many other materials-can become confined in all three dimensions. While optical tweezing has existed for over a decade, it has generally been limited to trapping one or two particles at a time. We have developed a technique that uses laser light to assemble large numbers of micro-particles in a highly controllable way. Here we describe, for the first time, the complete implementation of holographic optical tweezer arrays …