Combustion chamber struts can be effectively transpiration cooled

Vapor-deposited sintering technique increases the feasible temperature range of transpiration-cooled structural members in combustion chambers. This technique produces a porous mass of refractory metal wires around a combustion chamber structural member. This mass acts as a transpiration-cooled surface for a thick-walled tube

Have Recent Budget Policies Contributed to Long-Run Fiscal Stability?

Examines developments in budget policies since January 2010; the president's 2011 budget, including economic stimulus and tax and spending policies; congressional action; and issues for health reform. Considers their effect on long-term sustainability

Committees Tackle the Deficit

Summarizes the recommendations of a presidential commission and private bipartisan committee for reducing the federal deficit by cutting healthcare costs, Social Security outlays, and discretionary spending, and by raising taxes

Controlling the Deficit: The Debate Continues

Looks at budget cuts proposed by House Republicans and the president's framework with respect to savings in healthcare spending, Social Security and other entitlement spending, and discretionary spending; tax policy; and the Budget Control Act

A simultaneous spin/eject mechanism for aerospace payloads

A simultaneous spin/eject mechanism was developed for aerospace applications requiring a compact, passive device which would accommodate payload support and controlled-release functions, and which would provide a highly accurate spin-ejection motion to the payload. The mechanism satisfied the requirements and is adaptable to other deployment applications

Lessons of Election 2000

Many people believe that Election 2000 proved only how divided the nation is over politics and policy. In contrast, this study draws six lessons from Election 2000. Congress should set up a commission to recommend changes in the electoral system; the states should have the choice of accepting the reforms and the obligation to pay for them. The Electoral College should be preserved. The framers designed the Electoral College to limit arbitrary power. Abolishing the Electoral College would weaken the states and damage federalism. The United States is a consitutional republic, not a regime based on "the will of the people." Several politicians have appealed to the will of the people in the Florida struggle. The will of the people is a concept alien to the American political tradition of limited constitutional government. Underlying public attitudes strongly supported limited government in Election 2000. Both the platforms of the candidates and public opinion polls indicate that the public's skepticism about government remains high. Campaign spending enhanced turnout and participation in Election 2000. Both the NAACP and unions spent lavishly on getting out the vote. If campaign spending is restricted, turnout will fall, contrary to the professed desire of advocates of capaign finance restrictions. Congress should not hold hearings about media mistakes. Any punishment for errors or bias by the networks on election night should be left to public opinion

Error estimation in the histogram Monte Carlo method

We examine the sources of error in the histogram reweighting method for Monte Carlo data analysis. We demonstrate that, in addition to the standard statistical error which has been studied elsewhere, there are two other sources of error, one arising through correlations in the reweighted samples, and one arising from the finite range of energies sampled by a simulation of finite length. We demonstrate that while the former correction is usually negligible by comparison with statistical fluctuations, the latter may not be, and give criteria for judging the range of validity of histogram extrapolations based on the size of this latter correction.Comment: 7 pages including 3 postscript figures, typeset in LaTeX using the RevTeX macro packag