Reconstruction of Initial Beam Conditions at the Exit of the DARHT II Accelerator

We consider a technique to determine the initial beam conditions of the DARHT II Accelerator by measuring the beam size under three different magnetic transport settings. This may be time gated to resolve the parameters as a function of time within the 2000 nsec pulse. This technique leads to three equations in three unknowns with solution giving the accelerator exit beam radius, tilt and emittance. We find that systematic errors cancel and so are not a problem in unfolding the initial beam conditions. Random uncorrelated shot to shot errors can be managed by one of three strategies: 1) make the transport system optically de-magnifying; 2) average over many individual shots; or 3) make the random uncorrelated shot to shot errors sufficiently small. The high power of the DARHT II beam requires that the beam transport system leading to a radius measuring apparatus be optically magnifying. This means that the shot to shot random errors must either be made small (less than about 1%) or that we average each of the three beam radius determinations over many individual shots.Comment: 3 pages, 3 figures, LINAC2000 paper TUB1

Bufo retiformis

Number of Pages: 2Integrative BiologyGeological Science

Exercises to determine the types of errors made in the solving of verbal problems in Algebra I.

Thesis (Ed.M.)--Boston Universit

Dipsosaurus, D. dorsalis

Number of Pages: 6Integrative BiologyGeological Science

Options for Regional Decision Making in Metro Atlanta

Who loses if nothing is done? The city of Atlanta, with its central location, mature transit network, excess capacity in utilities, and reasonably aggressive public officials will probably thrive no matter what happens outside the I-285 perimeter. Communities outside the boundaries of the ten-county Atlanta Regional Commission (ARC) area will enjoy the temporary fruits of being the next ring of new suburban development. Caught between the Atlanta magnet and the sprawling communities outside the ARC, ARC's suburban communities may bear the worst of the downside effects of the current regional decision-making structure. In the end, though, it is all of North Georgia that loses as congestion, pollution, rising taxes, and reduced quality of life diminish its attractiveness to economic development

Bufo kelloggi

Number of Pages: 2Integrative BiologyGeological Science

Charitable giving to humanitarian organizations in Spain

This paper studies influences on private donations in Spain. After surveying economic theory and past empirical findings on charitable behavior, I introduce Spanish microdata from 1992 on giving to humanitarian organizations. Using binary and multinomial logit models, I probe the likelihood of giving to these organizations, as well as that of stating different reasons for not giving. I find that the variable that most strongly predicts giving is income, and that, while most respondents that do not give cite financial reasons, lack of knowledge of the charities better explains low giving among most specific demographic groups. I discuss the implications of these results for public policy and nonprofit management. Classification-JEL : L3.. Nonprofit organizations, philanthropy, Spanish economy.

The Arts Economy in 20 Cities: Where Does Atlanta Stand?

The tremendous growth that Atlanta has experienced over the past decade has catapulted the city into a major metropolitan hub. Along with this growth, many issues have gained significance with regards to plans for the city's future direction of growth. One sector in particular that demands greater attention is the area of non-profit arts and art policy. The arts and culture have many perceived benefits for a community. The arts are commonly thought to improve a community's cultural life, revitalize urban areas, and while they also provide a base of support for artists and art organizations, may also ultimately stimulate economic growth. These benefits are thought to yield other desirable outcomes such as a safe and agreeable downtown, and an attractive site for business relocation.Unfortunately, non-profit regional arts in Atlanta have faced challenges in the areas of funding and audience development and there is anecdotal evidence that arts support is being provided by a relatively small segment of society. The Atlanta Arts Think Tank perceived that one appropriate way to validate the importance of these problems was to analyze data on Atlanta's regional performance, relative to other metropolitan peers.The purpose of this study is to gain a better understanding of the factors that might explain the condition of arts organizations in the region. The study compares Atlanta to nineteen of its peers in an attempt to determine where and if Atlanta is falling short, and what can be learned from other communities