Nonlinear spectroscopy in the strong-coupling regime of cavity QED

A nonlinear spectroscopic investigation of a strongly coupled atom-cavity system is presented. A two-field pump-probe experiment is employed to study nonlinear structure as the average number of intracavity atoms is varied from N̅≈4.2 to N̅≈0.8. Nonlinear effects are observed for as few as 0.1 intracavity pump photons. A detailed semiclassical simulation of the atomic beam experiment gives reasonable agreement with the data for N̅≳2 atoms. The simulation procedure accounts for fluctuations in atom-field coupling which have important effects on both the linear and nonlinear probe transmission spectra. A discrepancy between the simulations and the experiments is observed for small numbers of atoms (N̅≲1). Unfortunately, it is difficult to determine if this discrepancy is a definitive consequence of the quantum nature of the atom-cavity coupling or a result of the severe technical complications of the experiment

The 1953 Lemming Emigration at Point Barrow, Alaska

Contains account of observations and counts made at the Barrow base camp, an 80-acre area, and on the adjacent tundra on the mass movements of the brown lemming. Age composition; male-female ratio; condition of digestive tract, adrenals, reproductive organs, etc., were studied. Causes of this emigration (changes in food supply and cover) as well as similar movements earlier in this region and in Scandinavia are discussed

Investigation of ground vibration from circular tunnels using a 2.5D FE/BE model of tunnel and ground

A numerical model of a circular tunnel using the 2.5D finite element and boundary element method is described. This makes use of the constant geometry in the axial direction so that a two-dimensional model is solved for a series of wavenumbers. The full 3D solution can be recovered by a Fourier transformation. The response of the tunnel structure is analysed first. Then, the vibration at certain points on the ground surface is predicted using the tunnel-soil model. Finally, a parametric study is carried out to show the influence of different aspects of tunnel design to the vibration in the ground

Family Reflections on the District of Columbia Opportunity Scholarship Program: Final Summary Report

During the spring of 2004, the first federally funded voucher program – the District of Columbia Opportunity Scholarship Program (OSP) - was established. The School Choice Demonstration Project (SCDP) recognized that publicly-funded school vouchers represent a relatively new and unstudied approach to school choice and education reform. To address this need, the SCDP requested and received funding from the Annie E. Casey Foundation to capture the “Parent and Student Voices on the OSP.” A total of 110 families, representing 180 students, that applied during the first two years of the Program volunteered to participate in this study. As the last installment in a four-part annual series that began in 2005, this report summarizes key findings from the previous reports and provides a general overview of the respondents’ “reflections” upon their three or four years in the Program. Using a phenomenological approach, which includes focus groups, personal interviews and keypad polling information gathering techniques, participants were given multiple opportunities to share or describe their experiences. A consumer framework was often used to contextualize the families’ experiences. Their insights continue to shape the scope and direction of the OSP, and they will help inform other efforts to provide low income families with access to quality school options

A study to ascertain what effect the study of homophones has on spelling achievement

Thesis (Ed.M.)--Boston Universit

A study to ascertain what effect the study of homophones has on spelling achievement

Thesis (Ed.M.)--Boston Universit