Characterization and suppression techniques for degree of radiation damping in inversion recovery measurements

Radiation damping (RD) has been shown to affect T1 measurement in inversion recovery experiments. In this work, we demonstrate that the extent of RD depends upon the T1 of the sample. RD difference spectroscopy (RADDSY) is used to characterize the severity of RD, while gradient inversion recovery (GIR) is used for RD suppression in T1 measurements. At 9.4 T, for the radiation damping characteristic time (Trd) of 50 ms, these investigations show non-negligible RD effects for T1 values greater than Trd, with severe distortions for T1 longer than about 150 ms, showing reasonable agreement with the predicted Trd. We also report a discrepancy between published expressions for the characteristic RD time

SCHOOL CHOICE IN RURAL GEORGIA: AN EMPIRICAL ANALYSIS

Previous empirical studies of school choice have been at the national level, or have focussed on northeastern states. We estimate the demand for private education in rural Georgia, using proportion of private school attendance as an indicator variable. We find that income, tuition, race and school quality are important choice determinants. The results provide useful information for rural school administrators, and suggest that a tuition tax credit would have to be substantial to cause a significant exodus from public schools.School choice, Educational finance, Rural areas, Tuition tax credits, Public Economics,

THE ECONOMICS OF FLOW ENHANCEMENT VS. NUTRIENT CONTROLS IN MEETING WATER QUALITY STANDARDS

This paper explores the economics of using enhanced flow as part of a strategy to meet water quality standards. We begin by briefly sketching the relevant economic theory, which we then apply to a case study of a dissolved oxygen impaired stream segment in Georgia's Flint River Basin. Results show that meeting targeted water quality standards with strategies that include enhanced flow is significantly less costly than relying only on agricultural management practices.Environmental Economics and Policy,

Designing Effective Climate Change Mechanisms for Developing Countries

Research project funded in academic year 2008-09The University Archives has determined that this item is of continuing value to OSU's history.Climate change is widely recognized as one of humankind’s greatest challenges in the 21st century. If left unchecked, rising temperatures caused by greenhouse gas emissions could seriously harm economies, societies and ecosystems around the world.Mershon Center for International Security Studie

Georgia Water: "A Public Resource Or A Commodity" What Are The Real Policy Questions?

In this paper we first address the question as to the strength of Georgia's commitment to protect public interests in the state's water resources as such commitments are expressed in existing laws. Comparing legislative declarations of state policy in Georgia with those in 36 other Eastern States, we find that none of the states have expressions of this commitment that would reasonably be regarded as more strongly stated than Georgia law. In conclusion, we find that Georgia water law currently recognizes the public's dependence on the state's water resources and its commitment to policies and programs that assure that water is used prudently for the maximum benefit of the people. Adding "public resource" language to the law would not substantively strengthen these existing policy declarations.Attention is then turned to the "water as a commodity" issue. We argue here that the "water as a commodity" issues is at best poorly framed. In our view debate in Georgia should center on alternatives for resolving the reallocation issue; it should focus on the question as to how Georgia is to strike a balance between private, competing use of water and public, non-competing uses of water (e.g., instream flows), and how this balance is to be adjusted over time in response to changes in social, environmental, and climatic conditions. When market mechanisms are considered as one of the means to achieve reallocation, evaluation of their effectiveness is dependent on a particular set of market institutions. Thus, being "for" or "against" markets makes no more sense that being "for" or "against" water use permits -- everything depends on the provisions and protections of specific laws and proposals. Working Paper # 2002-00

Domestic Climate Change Policy and US Participation in International Climate : Regimes Prospects for the Next Four Years

The University Archives has determined that this item is of continuing value to OSU's history.This talk lays out the range of options for domestic policies on climate change and speculates on which choices are most likely. The speaker also assesses the resulting consequences for international progress and for effective long-term environmental policies.Ohio State University. Mershon Center for International Security StudiesEvent webpage, flie

The structure of 71Ni via beta-delayed neutron spectroscopy of 71Co

Studies of beta decays can give insights into the underlying structure of the nucleus. In particular, decays of closed-shell and near-closed-shell nuclei can provide important benchmarks for structure models, which are used in simulations of r-process nucleosynthesis. This work reports on a study of beta decays of 71Co produced in an experiment that was carried out in October 2016 at MSU’s National Superconducting Cyclotron Laboratory (NSCL) using the Versatile Array of Neutron Detectors at Low Energy (VANDLE). In order to carry out this experiment, a novel position-sensitive scintillating detector was developed to enable the sub-nanosecond timing response that VANDLE requires, which traditional silicon-based position-sensitive detectors would be unable to provide. This experiment marked the first time that VANDLE was used in a decay spectroscopy experiment at a fragmentation facility. The beta decay strength distribution for 71Co beta decay is determined above the neutron separation energy in 71Ni, and direct measurement of the beta-delayed neutron branching ratio is reported. The neutron branching ratio is higher than found in past measurements that sought to estimate it by measuring gamma-ray coincidences. Shell model calculations can explain the experimental data only when an effective Z=28 Shell gap is less than 2 MeV in 71Ni, a significant reduction over the 5 MeV expected near 78Ni

COSTS OF COASTAL HAZARDS: EVIDENCE FROM THE PROPERTY MARKET

A hedonic price model suggests that flooding and erosion hazards, and the actions taken against them, are major determinants of property values in American coastal areas. A zoning ordnance against new construction within the 60-year erosion hazard area would increase property values and perhaps conserve the coastal ecosystem.Environmental Economics and Policy, Land Economics/Use,

EXPANDING THE NATIONAL FLOOD INSURANCE PROGRAM TO COVER COASTAL EROSION DAMAGE

The National Flood Insurance Program does not currently cover damage strictly attributable to coastal erosion. This paper uses the results of a nationwide survey of coastal property owners to estimate the demand for such insurance. We find that there is significant demand at prices in the range of current flood insurance premiums. Demand is influenced in the hypothesized way by increased measures of erosion risk as well as by insurance price and income.Land Economics/Use, Risk and Uncertainty,