My first thoughts in writing this lecture are about the young women and young men who are beginning their lives in science: students and those beginning scientific research. I have been in experimental scientific research for 45 years; I have done some good experiments of which the best was the discovery of the tau leptonj I have followed research directions that turned out to be uninteresting ...

DESIGN OF A FREQUENCY-DOUBLED 423 nm LASER FOR USE IN A CALCIUM INTERFEROMETER Jeremiah Birrell Department of Physics and Astronomy Bachelor of Science In this thesis I determine the optimal parameters for maximizing second harmonic generation of 423 nm light for use in an atom interferometer. The analysis is done using the nonlinear crystal Beta Barium Borate. Both critical and noncritical pha...

Ashok Balasundaram: Cone beam Computed Tomography imaging of periodontal bone (Under the direction of Dr. André Mol) Cone beam computed tomography (CBCT) is a low-dose, low-cost three dimensional imaging modality used for several oral and maxillofacial applications. This project evaluated the accuracy of Cone-Beam CT imaging to assess periodontal alveolar bone. In Phase I, ground truth measurem...

We present PARSEC, a 3D parallel self-consistent particle tracking program which allows electron-cloud calculations in arbitrary external fields. The program is based on an general particle tracking framework called GenTrackE [5]. The Lorentz force equation is integrated with time as the independent variable. A 3D parallel Multigrid solver computes the electric field for the drive beam in the b...

Kienzler and Hernnan recently showed that good and remarkably simple approximations of the stress intensity factors of cracks in beams can be obtained by bending theory estimations of the strain energy release as the crack is widened into a band of finite width. Their method has been based on equating this energy release to the energy release rate due to crack length extension, which has been p...

I was driving up the Massachusetts Turnpike one evening last February when I knocked over a bottle of water. I grabbed for it, swerved inadvertently--and a few seconds later found myself blinking into the flashlight beam of a state trooper. "How much have you had to drink tonight, sir?" he demanded. Before I could help myself, I blurted out an answer that was surely a new one to him. "I haven't...

The design of the 1-2 GeV Synchrotron Radiation Source to be built at the Lawrence Berkeley Laboratory is described. The goal of this facility is to provide very high brightness photon beams in the ultraviolet and soft X -ray regions. The photon energy nnge to be served is from 0.5 eV to 10 keY, with the brightest beams available in the I eV I keY interval. For time-resolved experiments, beam p...

We describe a model for analytic analysis of transients in multicavity klystron output power and phase. Cavities are mod-eled as resonant circuits, while bunching of the beam is modeled using linear space-charge wave theory. Our analysis has been implemented in a computer program which we use in designing multicavity klystrons with stable output power and phase. We present as examples transient...

Bamboo oriented strand boards (BOSB) are very suitable for application in construction structures because of their excellent mechanical properties. This research investigated the shear performance bamboo I-beams composed BOSB to verify structural I-beams. Short beam tests and uniform vertical load capacity were performed investigate effects various factors on properties The results showed that ...