In this note we present some numerical results about a family of periodic orbits of the Restricted Three Body Problem RTBP The family considered is one of the Lyapunov families related to the equlibrium point L More concretely we deal with the family related to the vertical oscillations around this point Here we present a study of the normal behaviour of this family for several values of the ma...

This paper aims to show that certain syntactic differences between arguments and adjuncts can be thought of as a transparent reflection of differences between their contributions to neo-Davidsonian logical forms. Specifically, the crucial underlying distinction will be that between modifying an event variable directly, and modifying an event variable indirectly via a thematic relation. I note a...

W hen Donald Gause and Gerald Weinberg wrote this statement,1 they were asserting that writing tests is an effective way to test requirements’ completeness and accuracy. They also suggest writing these tests when gathering, analyzing, and verifying requirements—long before those requirements are coded. They go on to say, “We can use the black box concept during requirements definition because t...

In this essay I examine a recent argument by Steven Weinberg that seeks to establish local quantum field theory as the only type of quantum theory in accord with the relevent evidence and satisfying two basic physical principles. I reconstruct the argument as a demonstrative induction and indicate it’s role as a foil to the underdetermination argument in the debate over scientific realism.

On May 15, 1967, the United States Supreme Court decided the case of In re Gerald Gault, [FN1] a case seemingly destined to change forever and for better the way children accused of crimes are treated in state juvenile courts. In its opinion, the Court held that children were “persons” under the United States Constitution, and as such, had to be treated fairly when the state sought to deprive t...

I show that Tremaine–Weinberg (TW) measurements of bar pattern speeds are sensitive to errors in the position angle of the disc, PAdisc. I use an N-body experiment to measure these errors; for typical random PAdisc errors, the resulting scatter in the measured values of the dimensionless bar speed parameter R (defined as the ratio of the corotation radius to the bar semi-major axis) is of the o...

We study the Hamiltonian system made of weakly coupled anharmonic oscillators arranged on a three dimensional lattice Z2N × Z2, and subjected to a stochastic forcing mimicking heat baths of temperatures T1 and T2 on the hyperplanes at 0 and N . We introduce a truncation of the Hopf equations describing the stationary state of the system which leads to a nonlinear equation for the two-point stat...

Existing DNA nanodevices operate at equilibrium under changes in solution composition. We propose an alternative DNA switch design that can be driven and maintained out of equlibrium, under fixed chemical conditions. Moderate cooling rate after heat denaturation drives the switch to its lowest energy conformation, while rapid cooling (>100 degrees C/ms) locks the molecule in a unique alternativ...