Protecting America\u27s Cultural and Historical Patrimony

This Article suggests the procedures which the authors believe would effectively regulate the legal export of art works and be consistent with other foreign trade policies, while not unduly restricting free trade nor discouraging cultural exchange

Statistics of the Island-Around-Island Hierarchy in Hamiltonian Phase Space

The phase space of a typical Hamiltonian system contains both chaotic and regular orbits, mixed in a complex, fractal pattern. One oft-studied phenomenon is the algebraic decay of correlations and recurrence time distributions. For area-preserving maps, this has been attributed to the stickiness of boundary circles, which separate chaotic and regular components. Though such dynamics has been extensively studied, a full understanding depends on many fine details that typically are beyond experimental and numerical resolution. This calls for a statistical approach, the subject of the present work. We calculate the statistics of the boundary circle winding numbers, contrasting the distribution of the elements of their continued fractions to that for uniformly selected irrationals. Since phase space transport is of great interest for dynamics, we compute the distributions of fluxes through island chains. Analytical fits show that the "level" and "class" distributions are distinct, and evidence for their universality is given.Comment: 31 pages, 13 figure

Due Process in Decisions Relating to Tenure in Higher Education

The Special Committee on Education and the Law first interested itself in tenure procedures when a subcommittee looked into recent cases that challenged the confidentiality of votes in tenure decisions. That inquiry led to a broader examination of the processes that are or should be used when universities decide whether to confer tenure, or (less frequently) move to terminate a tenured appointment. This report is the outcome of that study