UDROP: A Small Contribution to the International Financial Architecture

The purpose of the UDROP proposal is to prevent debt rollover crises for foreign-currency-enominated debt instruments. For such liabilities, there is no international analogue to the domestic lender of last resort or to domestic deposit insurance. UDROP stands for Universal Debt Rollover Option with a Penalty. Our proposal is that all foreign currency liabilities should have a rollover option attached to them. The 'pure' version of the option would entitle the borrower to extend or roll over his performing debt at maturity for a specified period. The pricing of the option would be left to the contracting parties. A number of variants on the basic version are also considered. These make the individual borrower's ability to exercise his option contingent on the prior declaration of a state of 'disorderly markets', by the national central bank, the International Monetary Fund or an indicator of 'disorderly markets'. All versions of the scheme have the property that no commitment of public money is required, either by national governments or by international agencies such as the International Monetary Fund or the World Bank. The UDROP proposal is rule based and general: it is mandatory for all foreign-currency debt and automatic. That is, it is exercised at the discretion of the borrower. This stands in sharp contrast to the current practice of discretionary and politicised refinancing arrangements cobbled together in an ad-hoc manner on a case-by-case basis by the International Monetary Fund. UDROP is market-oriented: the terms and conditions on any foreign-currency loan and associated rollover option would be negotiated by the lenders and borrowers.

Electrolytic preparation of high dielectric films quarterly report, 3 aug. - 3 nov. 1964

Production of high dielectric films containing barium titanat

Electrolytic preparation of high dielectric thin films

Electrolytic formation techniques for high dielectric materials in thin films - barium salts - titanate, zirconate, and niobat

Electrolytic preparation of high dielectric films quarterly report, may 4 - aug. 3, 1965

Electrolytic preparation of high dielectric thin film coatings on refractory metal substrate

Small denominators, frequency operators, and Lie transforms for nearly integrable quantum spin systems

Based on the previously proposed notions of action operators and of quantum integrability, frequency operators are introduced in a fully quantum-mechanical setting. They are conceptually useful because another formulation can be given to unitary perturbation theory. When worked out for quantum spin systems, this variant is found to be formally equivalent to canonical perturbation theory applied to nearly integrable systems consisting of classical spins. In particular, it becomes possible to locate the quantum-mechanical operator-valued equivalent of the frequency denominators that may cause divergence of the classical perturbation series. The results that are established here link the concept of quantum-mechanical integrability to a technical question, namely, the behavior of specific perturbation series

Signatures of chaotic tunnelling

Recent experiments with cold atoms provide a significant step toward a better understanding of tunnelling when irregular dynamics is present at the classical level. In this paper, we lay out numerical studies which shed light on the previous experiments, help to clarify the underlying physics and have the ambition to be guidelines for future experiments.Comment: 11 pages, 9 figures, submitted to Phys. Rev. E. Figures of better quality can be found at http://www.phys.univ-tours.fr/~mouchet

Integrated Management and Visualization of Electronic Tag Data with Tagbase

Electronic tags have been used widely for more than a decade in studies of diverse marine species. However, despite significant investment in tagging programs and hardware, data management aspects have received insufficient attention, leaving researchers without a comprehensive toolset to manage their data easily. The growing volume of these data holdings, the large diversity of tag types and data formats, and the general lack of data management resources are not only complicating integration and synthesis of electronic tagging data in support of resource management applications but potentially threatening the integrity and longer-term access to these valuable datasets. To address this critical gap, Tagbase has been developed as a well-rounded, yet accessible data management solution for electronic tagging applications. It is based on a unified relational model that accommodates a suite of manufacturer tag data formats in addition to deployment metadata and reprocessed geopositions. Tagbase includes an integrated set of tools for importing tag datasets into the system effortlessly, and provides reporting utilities to interactively view standard outputs in graphical and tabular form. Data from the system can also be easily exported or dynamically coupled to GIS and other analysis packages. Tagbase is scalable and has been ported to a range of database management systems to support the needs of the tagging community, from individual investigators to large scale tagging programs. Tagbase represents a mature initiative with users at several institutions involved in marine electronic tagging research

Chaos assisted tunnelling with cold atoms

In the context of quantum chaos, both theory and numerical analysis predict large fluctuations of the tunnelling transition probabilities when irregular dynamics is present at the classical level. We consider here the non-dissipative quantum evolution of cold atoms trapped in a time-dependent modulated periodic potential generated by two laser beams. We give some precise guidelines for the observation of chaos assisted tunnelling between invariant phase space structures paired by time-reversal symmetry.Comment: submitted to Phys. Rev. E ; 16 pages, 13 figures; figures of better quality can be found at http://www.phys.univ-tours.fr/~mouchet