1,065,815 research outputs found
ALSEP termination report
The Apollo Lunar Surface Experiments Package (ALSEP) final report was prepared when support operations were terminated September 30, 1977, and NASA discontinued the receiving and processing of scientific data transmitted from equipment deployed on the lunar surface. The ALSEP experiments (Apollo 11 to Apollo 17) are described and pertinent operational history is given for each experiment. The ALSEP data processing and distribution are described together with an extensive discussion on archiving. Engineering closeout tests and results are given, and the status and configuration of the experiments at termination are documented. Significant science findings are summarized by selected investigators. Significant operational data and recommendations are also included
Assessing the Complexity of a Recovered Design and its Potential Redesign Alternatives
Organised by: Cranfield UniversityReverse engineering techniques are applied to generate a part model where there is no existing
documentation or it is no longer up to date. To facilitate the reverse engineering tasks, a modular, multiperspective
design recovery framework has been developed. An evaluation of the product and feature
complexity characteristics can readily be extracted from the design recovery framework by using a
modification of a rapid complexity assessment tool. The results from this tool provide insight with respect to
the original design and assists with the evaluation of potential alternatives and risks, as illustrated by the
case study.Mori Seiki – The Machine Tool Compan
Potential of Interplanetary Torques and Solar Modulation for Triggering Terrestrial Atmospheric and Lithospheric Events
The Sun is forced into an orbit around the barycenter of the solar system
because of the changing mass distribution of the planets. Solar-planetary-lunar
dynamic relationships may form a new basis for understanding and predicting
cyclic solar forcing functions on the Earth's climate.Comment: Invited Paper at the Fourth UN/ESA Workshop on Basic Space Science,
Cairo, Egypt, July 1994. 7 pages LaTeX. Accepted for publication in the
journal Earth, Moon, and Planet
Minimum L1-distance projection onto the boundary of a convex set: Simple characterization
We show that the minimum distance projection in the L1-norm from an interior
point onto the boundary of a convex set is achieved by a single, unidimensional
projection. Application of this characterization when the convex set is a
polyhedron leads to either an elementary minmax problem or a set of easily
solved linear programs, depending upon whether the polyhedron is given as the
intersection of a set of half spaces or as the convex hull of a set of extreme
points. The outcome is an easier and more straightforward derivation of the
special case results given in a recent paper by Briec.Comment: 5 page
Autoplot: A browser for scientific data on the web
Autoplot is software developed for the Virtual Observatories in Heliophysics
to provide intelligent and automated plotting capabilities for many typical
data products that are stored in a variety of file formats or databases.
Autoplot has proven to be a flexible tool for exploring, accessing, and viewing
data resources as typically found on the web, usually in the form of a
directory containing data files with multiple parameters contained in each
file. Data from a data source is abstracted into a common internal data model
called QDataSet. Autoplot is built from individually useful components, and can
be extended and reused to create specialized data handling and analysis
applications and is being used in a variety of science visualization and
analysis applications. Although originally developed for viewing
heliophysics-related time series and spectrograms, its flexible and generic
data representation model makes it potentially useful for the Earth sciences.Comment: 16 page
Laser measuring system accurately locates point coordinates on photograph
Laser activated ultraprecision ranging apparatus interfaced with a computer determines point coordinates on a photograph. A helium-neon gas CW laser provides collimated light for a null balancing optical system. This system has no mechanical connection between the ranging apparatus and the photograph
Experimental verification of computer spray-combustion models
Analytical model formulation, representing performance of spray-combustion device, is based on understanding of atomization, mixing, vaporization, and combustion which occurs in device. Report lists results of correlations of computed values with values obtained from experiments with rocket combustor. Technique offers excellent method for evaluating validity and ranges of applicability of combustion models
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