In a Rayleigh-Taylor instability a dense fluid sits metastably atop a less dense fluid, a configuration that can be stabilized using a magnetic field gradient when one fluid is highly paramagnetic. On switching off the magnetic field, the instability occurs as the dense fluid falls under gravity. By affixing appropriately shaped magnetically permeable wires to the outside of the cell, one may i...

BACKGROUND Reduced gait speed is common following traumatic brain injury (TBI). Several studies have found that people with TBI display increased lateral movement in their center of mass while walking. It has been hypothesized that reduced gait speed following TBI is a consequence of increased caution and postural instability, but reduced ankle power generation at push-off may also play a contr...

We study the nonlinear response of a ferrimagnetic sphere resonator (FSR) strongly coupled to microwave loop-gap (LGR). The measured in regime weak nonlinearity allows extraction FSR Kerr coefficient and its cubic damping rate. find that there is certain range driving parameters which system exhibits instability. In range, self-sustained modulation reflected power off generated. instability att...

We compare two approaches for estimating the distribution of consumers’ willingness to pay (WTP) in discrete choice models. The usual procedure is to estimate the distribution of the utility coefficients and then derive the distribution of WTP, which is the ratio of coefficients. The alternative is to estimate the distribution of WTP directly. We apply both approaches to data on site choice in ...

Copyright 2010 Northeastern Agricultural and Resource Economics Association It is especially important that researchers be cautious about presenting willingness to pay (WTP) point estimates to policy makers when the estimates are sensitive to subjective decisions that the researchers make during the estimation process. It is well known that WTP point estimates are sensitive to the choice regard...

EDUCATION JOURNAL 17 T wo of the three major international comparison research projects – PIRLS and PISA – were published in late November and early December and in this international supplement we bring you detailed reports on these two programmes and analysis of these and some other international surveys. This supplement is a collaborative effort from NFER’s leading researchers and some of ou...

Contingent valuation (CV) and conjoint analysis were used to estimate landowner’s willingness to pay (WTP) for ecosystem management on non-industrial private forest land. The results suggest that even when conjoint and CV questions are the same, except for rating and pricing format, respectively, WTP estimates are quite different. Since most conjoint models essentially count ‘maybe’ responses t...

indecision and resistance to change all hindered plans set out so hopefully in Tenon's fifth memoir, with his vision of 'How splendid hospitals can be'. It is tempting to see parallels in some of the problems faced by Tenon in drawing up his reports and in the politics of the finance, administration and location of hospitals today. The recent Tomlinson Report on hospitals throws the same shadow...

This paper presents the COG-FPOM, a model based on the Fuzzy Pay-Off Method (FPOM). The FPOM is a scenario-based real option valuation method that uses fuzzy numbers as possibility distributions. The paper shows an unexpected result generated by the original FPOM, in which the real option would have a negative value. It further analyses its reasons and suggests a way to overcome it, by using th...

One potential evolutionary response to environmental heterogeneity is the production of randomly variable offspring through developmental instability, a type of bet-hedging. I used an individual-based, genetically explicit model to examine the evolution of developmental instability. The model considered both temporal and spatial heterogeneity alone and in combination, the effect of migration pa...