Data management for earth observations

The management of NASA earth observation data is discussed. User requirements are identified, as well as means to facilitate data acquisition. It is shown that LANDSAT data can be preprocessed to condense data into a more accessible format, thus reducing data acquisition costs

A survey of NASTRAN improvements since level 15.5

Several improvements and capabilities were developed and installed in intermediate levels and are being analyzed and evaluated. A survey of current improvements to the program is presented which includes static analysis with differential stiffness rigid format, normal modes with differential stiffness rigid format, the TRIAAX and TRAPAX elements, the CNGRNT feature, fully stressed design, element strain energy and grid point force balance, and complex modal displacement plots

LSA And State Library Agencies

To know where our state libraries are going, it is important first to know where they have been and where they are now. Without going into this exhaustively, let me develop with you for a few moments some of the things that have happened to us in the five years since the Library Services Act became the law of the land. I think we are all aware of the fact that the r improvement in our state library agencies is one of the principal accomplishments of the Library Services Act. The publication, State Plans under the Library Services Act. Supplement 2, A makes this quite clear. State after state reported strengthened state library agencies in all parts of the country. Idaho, for example, employed its first trained administrator and three more professional librarians in the state agency. Kansas and Mississippi added professional librarians and clerical assistants. It was not just the small state agencies that did this, however; even the New York State Library built on its existing strength by adding specialists in Young Adult, Reference, and Children's Services. In all, more than 115 field workers or consultants were added to state agency staffs, an increase of more than 100 per cent over the total field staffs in existence in 1956. In addition, 285 other professional librarians were added.published or submitted for publicatio

Primordial Circular Polarization in the Cosmic Microwave Background

Circular ("V-mode") polarization is expected to be vanishing in the CMB, since it is not produced in Thomson scattering. However, considering that the conventional CMB anisotropies are generated via an early universe mechanism such as inflation or a bouncing scenario, it is possible that circular polarization could be primordially produced and survive to the surface of last scattering. We study this in detail, and find a large class of inflationary models that produce a nearly scale invariant spectrum of scalar V-mode anisotropies. We study the inflationary production and subsequent evolution via the Boltzmann hierarchy, and show that V-mode polarization present in the CMB is suppressed by a factor of at least $10^{10^{20}}$ relative to the primordial $V$, consistent with expectation of negligible V-mode polarization from inflation. We consider alternative possibilities for sourcing $V$ primordially, such as the V-mode polarization induced by circularly polarized primordial gravitational waves, or producing $V$ after inflation, via new interactions at recombination.Comment: 8 pages, 1 figure. v2: references added. v3:matches published version. v4:typo correcte

Fiscal policy in an era of surpluses: economic and financial implications - opening remarks

Fiscal policy ; Budget

Financial innovation and monetary transmission, opening remarks

Monetary policy ; Financial modernization

Opening remarks

Opening remarks at the conference "Policies to Promote Affordable Housing," cosponsored by the Federal Reserve Bank of New York and New York University's Furman Center for Real Estate and Urban Policy, February 7, 2002.Housing - Finance ; Housing policy

Non-Kahler Resolved Conifold, Localized Fluxes in M-Theory and Supersymmetry

The known supergravity solution for wrapped D5-branes on the two-cycle of a Kahler resolved conifold is in general ISD but not supersymmetric, with the supersymmetry being broken by the presence of (1, 2) fluxes. However if we allow a non-Kahler metric on the resolved conifold, supersymmetry can easily be restored. The vanishing of the (1, 2) fluxes here corresponds to, under certain conformal rescalings of the metric, the torsion class constraints. We construct a class of explicit non-Kahler metrics on the resolved conifold satisfying the constraints. All this can also be studied from M-theory, where the fluxes and branes become non-localized G-fluxes on deformed Taub-NUT spaces. Interestingly, the gauge fluctuations on the wrapped D5-branes appear now as localized G-fluxes in M-theory. These localized fluxes are related to certain harmonic two-forms that are normalizable. We compute these forms explicitly and discuss how new constraints on the geometry of the non-Kahler manifolds may appear from M-theory considerations.Comment: 40 pages, no figures, LaTeX JHEP forma