Variability of flyover noise measures for repeated flights of turbojet and piston engine transport aircraft

Measurement of variability of aircraft noise during level flight flyover

Opportunities and Challenges: The Caribbean Involvement in the Free Trade Area of the Americas

This Article will examine the region\u27s participation in the process leading to the establishment of the FTAA, and the benefits and challenges associated with its involvement in this hemispheric undertaking. Part One of the Article sets out the rationale for the establishment of the FTAA and the structure of the negotiations. The section also identifies some elements of the unique nature of the proposed grouping. Part Two discusses the challenges facing Caribbean countries as they participate in multilateral trade negotiations, including the FTAA. In Part Three, the Article critically reviews the early stages of the integration process in the Caribbean and examines the most recent developments in the process, particularly in the context of the process of globalization and liberalization. This is followed by Part Four, which discusses the Caribbean\u27s participation in the FTAA

Opportunities and Challenges: The Caribbean Involvement in Free Trade Area ofthe Americas

This Article will examine the region\u27s participation in the process leading to the establishment of the FTAA, and the benefits and challenges associated with its involvement in this hemispheric undertaking. Part One of the Article sets out the rationale for the establishment of the FTAA and the structure of the negotiations. The section also identifies some elements of the unique nature of the proposed grouping. Part Two discusses the challenges facing Caribbean countries as they participate in multilateral trade negotiations, including the FTAA. In Part Three, the Article critically reviews the early stages of the integration process in the Caribbean and examines the most recent developments in the process, particularly in the context of the process of globalization and liberalization. This is followed by Part Four, which discusses the Caribbean\u27s participation in the FTAA

IMPMOT user's manual

This user's manual describes the input and output variables as well as the job control language necessary to utilize the IMP-H apogee motor firing program, IMPMOT. The IMPMOT program can be executed as either a stand-alone program or as a member of the flight dynamics system. This program is used to determine the time and attitude at which to fire the IMP-H apogee boost motor. The IMPMOT program is written in FORTRAN 4 for use on the IBM 360 series computer

Bogoliubov transformations and exact isolated solutions for simple non-adiabatic Hamiltonians

We present a new method for finding isolated exact solutions of a class of non-adiabatic Hamiltonians of relevance to quantum optics and allied areas. Central to our approach is the use of Bogoliubov transformations of the bosonic fields in the models. We demonstrate the simplicity and efficiency of this method by applying it to the Rabi Hamiltonian.Comment: LaTeX, 16 pages, 1 figure. Minor additions and journal re

Institutional Effects in a Simple Model of Educational Production

This paper presents a model of educational production that tries to make sense of recent evidence on effects of institutional arrangements on student performance. In a simple principal-agent framework, students choose their learning effort to maximize their net benefits, while the government chooses educational spending to maximize its net benefits. In the jointly determined equilibrium, schooling quality is shown to depend on several institutionally determined parameters. The impact on student performance of institutions such as central examinations, centralization versus school autonomy, teachers\u27 influence, parental influence, and competition from private schools is analyzed. Furthermore, the model can rationalize why positive resource effects may be lacking in educational production

Reliability modeling of a 1-out-of-2 system: Research with diverse Off-the-shelf SQL database servers

Fault tolerance via design diversity is often the only viable way of achieving sufficient dependability levels when using off-the-shelf components. We have reported previously on studies with bug reports of four open-source and commercial off-the-shelf database servers and later release of two of them. The results were very promising for designers of fault-tolerant solutions that wish to employ diverse servers: very few bugs caused failures in more than one server and none caused failure in more than two. In this paper we offer details of two approaches we have studied to construct reliability growth models for a 1-out-of-2 fault-tolerant server which utilize the bug reports. The models presented are of practical significance to system designers wishing to employ diversity with off-the-shelf components since often the bug reports are the only direct dependability evidence available to them

Ab Initio Simulation of the Nodal Surfaces of Heisenberg Antiferromagnets

The spin-half Heisenberg antiferromagnet (HAF) on the square and triangular lattices is studied using the coupled cluster method (CCM) technique of quantum many-body theory. The phase relations between different expansion coefficients of the ground-state wave function in an Ising basis for the square lattice HAF is exactly known via the Marshall-Peierls sign rule, although no equivalent sign rule has yet been obtained for the triangular lattice HAF. Here the CCM is used to give accurate estimates for the Ising-expansion coefficients for these systems, and CCM results are noted to be fully consistent with the Marshall-Peierls sign rule for the square lattice case. For the triangular lattice HAF, a heuristic rule is presented which fits our CCM results for the Ising-expansion coefficients of states which correspond to two-body excitations with respect to the reference state. It is also seen that Ising-expansion coefficients which describe localised, $m$-body excitations with respect to the reference state are found to be highly converged, and from this result we infer that the nodal surface of the triangular lattice HAF is being accurately modeled. Using these results, we are able to make suggestions regarding possible extensions of existing quantum Monte Carlo simulations for the triangular lattice HAF.Comment: 24 pages, Latex, 3 postscript figure