NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science Applications, volume 1

Papers and viewgraphs from the conference are presented. This conference served as a broad forum for the discussion of a number of important issues in the field of mass storage systems. Topics include magnetic disk and tape technologies, optical disks and tape, software storage and file management systems, and experiences with the use of a large, distributed storage system. The technical presentations describe, among other things, integrated mass storage systems that are expected to be available commercially. Also included is a series of presentations from Federal Government organizations and research institutions covering their mass storage requirements for the 1990's

NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science Applications, volume 2

This report contains copies of nearly all of the technical papers and viewgraphs presented at the NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science Application. This conference served as a broad forum for the discussion of a number of important issues in the field of mass storage systems. Topics include the following: magnetic disk and tape technologies; optical disk and tape; software storage and file management systems; and experiences with the use of a large, distributed storage system. The technical presentations describe, among other things, integrated mass storage systems that are expected to be available commercially. Also included is a series of presentations from Federal Government organizations and research institutions covering their mass storage requirements for the 1990's

Parallel Out-of-Core Sorting: The Third Way

Sorting very large datasets is a key subroutine in almost any application that is built on top of a large database. Two ways to sort out-of-core data dominate the literature: merging-based algorithms and partitioning-based algorithms. Within these two paradigms, all the programs that sort out-of-core data on a cluster rely on assumptions about the input distribution. We propose a third way of out-of-core sorting: oblivious algorithms. In all, we have developed six programs that sort out-of-core data on a cluster. The first three programs, based completely on Leighton\u27s columnsort algorithm, have a restriction on the maximum problem size that they can sort. The other three programs relax this restriction; two are based on our original algorithmic extensions to columnsort. We present experimental results to show that our algorithms perform well. To the best of our knowledge, the programs presented in this thesis are the first to sort out-of-core data on a cluster without making any simplifying assumptions about the distribution of the data to be sorted

Proceedings of the NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science Applications

The proceedings of the National Space Science Data Center Conference on Mass Storage Systems and Technologies for Space and Earth Science Applications held July 23 through 25, 1991 at the NASA/Goddard Space Flight Center are presented. The program includes a keynote address, invited technical papers, and selected technical presentations to provide a broad forum for the discussion of a number of important issues in the field of mass storage systems. Topics include magnetic disk and tape technologies, optical disk and tape, software storage and file management systems, and experiences with the use of a large, distributed storage system. The technical presentations describe integrated mass storage systems that are expected to be available commercially. Also included is a series of presentations from Federal Government organizations and research institutions covering their mass storage requirements for the 1990's

Water Current, Volume 30, No. 6, December 1998

Additional Research Shows Promise for Buffer Strips From the Director: Testing Your Drinking Water; Drinking Water Tabloid Suggestions; USGS RFPs Planning Nebraska\u27s Water Future Where Do You Get Your Water From? Recycling Program Collects 49 Tons of Plastic Lingle Earns Extension Wildlife Award Laundry Disk ClaimsDon\u27t Hold Water Seminars Spotlight Latest in Water Research Nation\u27s Water Use Down, USGS Says Water News Briefs Agronomy Society Lauds Website Free Wetlands Tabloid Franti Earns Research Award Looking for Ideas Ben Nelson Service Award Great Plains Research Articles Assessing the Impact of Waste Lagoons on Groundwate

Electron trapping optical data storage system and applications

A new technology developed at Optex Corporation out-performs all other existing data storage technologies. The Electron Trapping Optical Memory (ETOM) media stores 14 gigabytes of uncompressed data on a single, double-sided 130 mm disk with a data transfer rate of up to 120 megabits per second. The disk is removable, compact, lightweight, environmentally stable, and robust. Since the Write/Read/Erase (W/R/E) processes are carried out photonically, no heating of the recording media is required. Therefore, the storage media suffers no deleterious effects from repeated W/R/E cycling. This rewritable data storage technology has been developed for use as a basis for numerous data storage products. Industries that can benefit from the ETOM data storage technologies include: satellite data and information systems, broadcasting, video distribution, image processing and enhancement, and telecommunications. Products developed for these industries are well suited for the demanding store-and-forward buffer systems, data storage, and digital video systems needed for these applications

DOE/NASA wind turbine data acquisition system. Part 4: Operations and maintenance manual (Plumbrook Station)

Preventive maintenance, calibration procedures, system verification, system operating procedures, systems software fundamentals, data base (program files), and patchboard layout are discussed

A generalized strategy for building resident database interfaces

A strategy for building resident interfaces to host heterogeneous distributed data base management systems is developed. The strategy is used to construct several interfaces. A set of guidelines is developed for users to construct their own interfaces

Miniaturized Fractionation and Purification of Analytes of Interest in Complex Mixtures: Protein Enrichment and Purification with Capillary Electrophoresis and Identification of Pesticide Chemicals in Bio-oils

The ability to isolate and detect an analyte of interest is vital for many different facets of life today, from disease detection to environmental safety. The goal of the method development discussed within this thesis is to isolate and identify unique analytes from complex matrices and to do so in a scaled down approach. Removal of an analyte from a diverse background of molecules is often required for successful detection and determination of analyte properties. As well, many samples are only available at low volumes and at trace levels so miniaturized techniques that only require small sample volumes are designed and discussed herein. Two unique classes of analytes are examined with one common theme of isolation for successful detection. Proteins and peptides are enriched and purified from permanently charged and buffering ions, which are common biological contaminants, using discontinuous buffers with capillary electrophoresis. This method only uses sub-microliter quantities of sample and exploits the isoelectric point of the biological macromolecules in buffers of different pH. Successful removal of sodium chloride, TRIS, phosphate, and MES is demonstrated. Subsequent enhanced mass spectral detection and separation of a protein mixture exhibited the improved analyte detection by employing discontinuous buffers. Magnetic beads are used to isolate phosphorylated peptides at micro to nanoliter volumes by covalent derivatization of the post-translational modification and selective enrichment, further demonstrating the online CE sample preparation capabilities. The second challenging sample examined is bio-oil, a complex mixture of thousands of chemicals. The novel pesticide properties of this sample are explored as the chemical complexity of pyrolysis bio-oil from tobacco leaves is reduced through isolation by solid phase extraction, liquid-liquid extraction, and heating. Mass spectrometry is used to identify the compounds after separation by gas chromatography. Three problematic microorganisms in Canada, S. scabies, C. michiganensis, and P. ultimum, are negatively affected by the bio-oil. It is determined that the most abundant phenolic species are not responsible for the observed pesticide activity from the bio-oil. A few minor components are identified that could contribute to the observed antimicrobial activity, but no abundant, active chemicals could be identified with the current technology