Hans Bethe: The Nuclear Many Body Problem

We discuss the work of Hans Bethe and others in formulating a theoretical foundation for the nuclear shell model. Written for a general audience, this article describes the evolution from Brueckner's reaction matrix theory to the Moszkowski-Scott separation method and ultimately to the Reference Spectrum method of Bethe, Brandow, and Petschek. We also discuss connections with the recently developed low momentum nucleon-nucleon interactions.Comment: 25 pages, 15 figures, In "Hans Bethe and His Physics" (World Scientific, Singapore, 2006

Oral Sources and PRC History: Best and Worst Practices

After grappling with such methodological dilemmas of finding interviewees, building trust, and recording or transcribing conversations, scholars of PRC history face different challenges as they shift from field research to the writing stage: how to present oral testimonies on the written page, and how to integrate oral history with textual sources. Drawing on the author\u27s experience conducting more than one hundred interviews about the rural-urban divide, the aftermath of accidents, and the Tiananmen Square protests of 1989, this paper offers practical advice about:- When to name names and when to protect anonymity;- How to track down interview subjects mentioned in written sources;- How to balance the scholarly impulse to frame and condense oral testimonies with the benefits of letting interviewees speak for themselves;- Which types of written sources most fruitfully complement oral histories. In addition to discussing the author\u27s own discoveries and mistakes, the paper also highlights the contributions and shortcomings of other recent works that draw on oral testimonies

Statistical Image Reconstruction for High-Throughput Thermal Neutron Computed Tomography

Neutron Computed Tomography (CT) is an increasingly utilised non-destructive analysis tool in material science, palaeontology, and cultural heritage. With the development of new neutron imaging facilities (such as DINGO, ANSTO, Australia) new opportunities arise to maximise their performance through the implementation of statistically driven image reconstruction methods which have yet to see wide scale application in neutron transmission tomography. This work outlines the implementation of a convex algorithm statistical image reconstruction framework applicable to the geometry of most neutron tomography instruments with the aim of obtaining similar imaging quality to conventional ramp filtered back-projection via the inverse Radon transform, but using a lower number of measured projections to increase object throughput. Through comparison of the output of these two frameworks using a tomographic scan of a known 3 material cylindrical phantom obtain with the DINGO neutron radiography instrument (ANSTO, Australia), this work illustrates the advantages of statistical image reconstruction techniques over conventional filter back-projection. It was found that the statistical image reconstruction framework was capable of obtaining image estimates of similar quality with respect to filtered back-projection using only 12.5% the number of projections, potentially increasing object throughput at neutron imaging facilities such as DINGO eight-fold

Proposition 6 and Local Debt Levels in Texas

The Kay Bailey Hutchison Center for Energy, Law, and Busines

Water Protectionism Hurts the Economies of Fast-Growing Regions

The Kay Bailey Hutchison Center for Energy, Law, and Busines

An evaluation of the educational program of the Springfield, Vermont, High School.

Thesis (Ed.D.)--Boston University Vita. Includes bibliographical references (leaves 435-440)