Intermediate Subfactors with No Extra Structure

If $N \subset P,Q \subset M$ are type II_1 factors with $N' \cap M = C id$ and $[M:N]$ finite we show that restrictions on the standard invariants of the elementary inclusions $N \subset P$, $N \subset Q$, $P \subset M$ and $Q \subset M$ imply drastic restrictions on the indices and angles between the subfactors. In particular we show that if these standard invariants are trivial and the conditional expectations onto $P$ and $Q$ do not commute, then $[M:N]$ is 6 or $6 + 4\sqrt 2$. In the former case $N$ is the fixed point algebra for an outer action of $S_3$ on $M$ and the angle is $\pi/3$, and in the latter case the angle is $cos^{-1}(\sqrt 2-1)$ and an example may be found in the GHJ subfactor family. The techniques of proof rely heavily on planar algebras.Comment: 51 pages, 65 figure

Monetary Information and Macroeconomic Fluctuations

This paper introduces contemporaneously available monetary data into an "equilibrium" model that combines rational expectations, market clearing, and incomplete information about monetary disturbances. Data on the current money stock involve a preliminary estimate that is subject to a subsequent process of gradual revision. The model implies the testable hypothesis that aggregate output and employment are uncorrelated with the contemporaneous measure of money growth implied by the difference between the currently available estimates of current and past money shocks. Rejection of this hypothesis provides strong evidence again at the equilibriums approach to modeling the relation between monetary disturbances and macro-economic fluctuations.

Tests of Equilibrium Macroeconomics Using Contemporaneous Monetary Data

This paper uses contemporaneous monetary data to carry out econometric tests of the "equilibrium" approach to modeling the relation between monetary disturbances and macroeconomic fluctuations. The theoretical analysis introduces into an equilibrium macroeconomic model the availability of preliminary data on current monetary aggregates and the process of accumulation of revised monetary data. The econometric analysis tests two hypotheses derived from this extended model. One hypothesis concerns the neutrality of perceived monetary policy. The other hypothesis concerns the nonneutrality of errors in preliminary monetary data. The econometric results imply rejection of both of these hypotheses. These tests provide strong evidence against the reality of the equilibrium approach.

Comparative study of heat rejection systems for portable life support equipment Final report

Comparsion of heat rejection systems for portable life support equipment for earth orbital or lunar surface EV

Employment Effects of the Federal Minimum Wage

This paper describes an empirical study of the effects of federal minimum wage policy on aggregate employment, on the employment of various demographic groups, and on employment in low-wage industries. The analytical framework permits separate testing both for direct employment effects of the level and coverage of the minimum wage and for indirect employment effects resulting from a possible role for the minimum wage as a cause of monetary nonneutrality. Another innovation in this study is the inclusion of rational expectations of expected future relative minimum wages as determinants of the demands and supplies of labor services. The study finds that minimum-wage policy seems not to affect aggregate employment or average wages either directly or indirectly. Minimum-wage policy, however, has large and statistically significant effects on the industrial and demographic composition of employment, with employment decreasing in certain low-wage industries and for teenagers and for young men but increasing for young women and for adults. A major part of these effects are associated with anticipated future changes in the level of the minimum wage.

The Federal Minimum Wage, Inflation, and Employment

This study investigates the effects of Federal minimum wage policy on mini-mum wage employment, aggregate employment, and average wage rates. The theoretical analysis focuses on the possible effect of the Federal minimum wage in constraining wages and employment in a subset of labor markets, on the possible responses of labor suppliers to these constraints, and on the possible role of the policy of presetting the nominal minimum wage in making monetary policy nonneutral. Among the elements of the theoretical framework that are both distinctive and important are the assumptions that both the demands and supplies of labor services in the subset of constrained markets depend on the expected relative minimum wage in the near and distant future, as well as on the current relative minimum wage and on past levels of employment, and that the relevant expectations of both workers and employers about relative minimum wages are "rational."

Neutrino masses and R-parity violation

We review different contributions to the neutrino masses in the context of R-parity violating supersymmetry in a basis independent manner. We comment on the generic spectrum expected in such a scenario comparing different contributions.Comment: Invited brief review for Mod. Phys. Lett. A, 15 pages, uses axodraw.st

Electron collision quenching of CO(v) chemiluminescence in CS2/O2 and CS2/O2/N2O flames

Chemiluminescence from vibrationally excited carbon monoxide formed by the reaction CS+O-->CO(v)+S was observed in CS2/O2 and CS2/O2/N2O flames to which an electric discharge was applied. Although the total amount of chemiluminescence increased with increasing discharge current probably due to enhanced reaction rates as a result of radical formation, the vibrational distribution was quenched, becoming thermal in character. The thermalization is attributed to superelastic electron collisions [e+CO(v)-->e+CO(v−1)]. The technique demonstrates a sensitive method for detecting collisional transfers between excited states by separating the perturbation (electron collisions) from the initial excitation mechanism (chemical reactions)

F-15 flight flutter test program

The modes to be observed during the F-15 flight flutter test program were selected on the basis of the results of analytical studies, wind tunnel tests, and ground vibration tests. The modes (both symmetrical and antisymmetrical) tracked on this basis were: fin first bending, fin torsion, fin tip roll, stabilator bending, stabilator pitch, boom lateral bending, boom torsion, boom vertical bending, wing first bending, wing second bending, wing first torsion, outer wing torsion, and aileron rotation. Data obtained for these various modes were evaluated in terms of damping versus airspeed at 1525 m (5000 ft), damping versus altitude at the cross-section Mach numbers (to extrapolate to the damping value to be expected at sea level), and flutter boundaries on the basis of flutter margin of various modal pairs representing potential flutter mechanisms. Results of these evaluations are summarized in terms of minimum predicted flutter margin for the various mechanisms

A Real CKM Matrix and Physics Beyond the Standard Model

We study the possible existence of a real Cabibbo-Kobayashi-Maskawa (CKM) matrix, with CP violation originating from physics beyond the standard model (SM). We show that present experimental data allow for a real CKM matrix provided that new physics also contributes to Delta m_{B_d} by at least 20% of the SM contribution (for rho > 0), besides generating CP violation in the kaon sector. The naturalness of a real CKM matrix is studied within the framework of general multi-Higgs-doublet models with spontaneous CP violation. As an example, we discuss a specific two-Higgs-doublet model and its implications for CP asymmetries in non-leptonic neutral B-meson decays.Comment: 19 pages, LaTeX2e, 1 figure, uses amssymb, elsart, psfig, and subeqn style file