Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
The Electromagnetic Plasmoid Thruster (EMPT) program demonstrated a next generation propulsion system based on the purely electromagnetic generation and Lorentz acceleration of a magnetically self-confined plasmoid. The Peristaltic Dynamic Acceleration (PDA) stage is an addition to the exhaust of the EMPT that takes an existing, translating plasmoid and adds directed, kinetic energy with a set of sequenced magnetic field coils. The EMPT creates a high-density, magnetized plasmoid known as a Field Reversed Configuration (FRC) using external RF antennas that produce a Rotating Magnetic Field (RMF) throughout the thruster. The large FRC plasma currents together with the radial magnetic field result in a large JxB force that rapidly accelerates the FRC propellant out of the thruster. The Dynamic Acceleration stage then initiates a pulsed magnetic field behind the FRC increasing the magnetic field pressure gradient. These pulsed field coils can very efficiently add kinetic energy to a magnetized, closed-field plasmoid and be used to increase velocity and average thruster power from 1 kW to greater than 20 kW, all without any changes to the original thruster. The EMPT will be operated at maximum ionization efficiency at 2 kHz. The PDA will then accelerate the high-mass plasmoid to the required mission velocities. In this way power can be added to the device incrementally depending on the mission and power available. This also enables a so-called dual mode thruster that can operate over a wide range of power, thrust, and specific impulse while still maintaining constant gas flow for very long life, deep space missions. The PDA allows for the incremental development and qualification of the thruster, dramatically reducing total costs. Finally, the ability to rapidly and cheaply increase the power of a space-qualified thruster by factors of ten allow for the propulsion technology to grow with the available power for NASA science missions.
Published By Department of Justice
Issued almost 10 years ago
Summary
Description
Web Site Research and Development (Internet and Intranet)
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
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Description
Please note that the machine on which these AVHRR data are processed has reached its life expectancy and will no longer be available as of 02 June 2008 until further notice. NSIDC collects and archives 1.1 km High Resolution Picture Transmission (HRPT) and Local Area Coverage (LAC) Advanced Very High Resolution Radiometer (AVHRR) imagery. Original data are from recorded and rebroadcast LAC images for both polar regions and from several HRPT receiving stations, including McMurdo, Palmer, Casey, Fairbanks, Prince Albert, and Tromso. NSIDC receives these data from a polar subset of the EROS Data Center (EDC) Global Land 1 km AVHRR Data Set and from the Scripps Institute of Oceanography, which collects Antarctic HRPT data from the McMurdo and Palmer stations. NSIDC received LAC data for the Southern Hemisphere through 1998 from a University of Colorado Domestic Satellite (DOMSAT) receiver and from the National Oceanic and Atmospheric Administration (NOAA) Satellite Active Archive (SAA) after 1998. These sources provide nearly complete coverage of sea ice, land ice, and polar land in the north and south polar regions, at 1.1 km resolution for all five bands of the AVHRR sensor. Data extend from April 1992 through the present for the Southern Hemisphere, and from August 1993 through the present for the Northern Hemisphere. Archived scenes, browse imagery, and information on location, time of acquisition, image size, and data quality are available via the AVHRR Polar 1 Km Level 1B Data Set Product Web site.
Published By U.S. Department of Health & Human Services
Issued almost 10 years ago
Summary
Description
The MMA legislation provides seniors and people with disabilities with the first comprehensive prescription drug benefit ever offered under the Medicare program, the most significant improvement to senior health care in nearly 40 years. This overview page provides links to important information on the new benefit.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
FTT proposes development of a magnetically actuated dynamic seal. Dynamic seals are used throughout the turbopump in high-performance, pump-fed, liquid rocket engines for a variety of purposes. The most common applications are in the lift-off seal (LOS), inter-propellant seal (IPS), and balance piston seals high-pressure orifice (HPO), low-pressure orifice (LPO), and inner diameter impeller shroud seal (eye seal). The system solution for conventional seals represents a compromise between the turbopump mechanical design, primarily flowpath, and secondary flowpath design that results in increased leakage, increased seal wear, and reduced balance piston load capacity that reduces performance, throttle-ability, thrust-to-weight, reliability, and operability. The magnetically actuated seal eliminates this compromise and provides significant improvement in performance, throttle-ability, thrust-to-weight, reliability, and operability. Phase 1 resulted in a significant advancement of the technology by demonstrating a magnetically actuated face seal in both ambient and cryogenic conditions, characterizing the seal and actuator performance, and quantifying the performance improvements for the turbopump and engine. Phase 2 will advance the technology from TRL 3 to 5. The technology is applicable to booster engines, in-space engines, and ascent/descent engines.
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
Summary
Description
This satellite altimeter data base contains precise geoid and gravity anomaly profiles which were constructed from the average of 44 repeat cycles of Geosat. The data are contained in two files: (1) geo44asc.bin (987755 records) contains the ascending profiles which run southeast to northwest between 72S and 72N, and (2) geo44des.bin (991313 records) contains all of the descending profiles. The data parameters in addition to time and location are geoid height, gravity anomaly and uncertainty in gravity anomaly. For additional information see geosat.txt in this directory.
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
Surface-sensing Measurements for Radiative Transfer (SMART) and Chemical, Optical, and Microphysical Measurements of In-situ Troposphere (COMMIT) consist of a suite of instruments that measure (both in-situ and by remote sensing) parameters that help to characterize, as completely as possible, constituents of the atmosphere at a given location. SMART and COMMIT are mobile systems that can be deployed to locations that exhibit interesting atmospheric phenomena. This allows investigators to participate in coordinated measurement campaigns, such as SAFARI 2000.The SMART instruments were deployed to the Skukuza Airport from August 15 to September 17, 2000 to take part in the SAFARI 2000 Dry Season Aircraft Campaign. The SMART-COMMIT mission is designed to pursue the following goals: Earth Observing System (EOS) validation; innovative investigations; and long-term atmospheric monitoring. The results reported in this data set are for the following instruments deployed and measurements recorded at the Skukuza Airport site within the Kruger National Park: several broadband radiometers, for global, diffuse, direct downward solar irradiance and global infrared downward irradiance; meteorological sensors, for surface air temperature, pressure, relative humidity, and wind; and a Solar Spectral Flux Radiometer (NASA Ames) for spectral solar downward irradiance.
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
This annual narrative report for Leopold Wetland Management District summarizes refuge activities during fiscal year 2009. The report begins with an introduction to the refuge and a summary of the years highlights and climatic conditions. Information about monitoring and studies including orchids and grassland birds is provided next. Habitat restoration and management projects are also covered; activities include wetland and upland restoration, water level management, moist soil management, prescribed burning, and invasive plant control. Fish and wildlife management is discussed next with emphasis on bird banding and predator control. Coordination activities, such as agency partnerships and private land activities are outlined. The resource protection section provides information about law enforcement and land acquisition. Information about public education and recreation is given including visitor services and outreach programs. Finally, refuge planning and administration are discussed.
Published By Department of Commerce
Issued almost 10 years ago
Summary
Description
Contains the sample data from Census 2000, which is the information compiled from the questions asked of a sample of all people and housing units. The sample data are presented in 213 population tables (matrices) and 110 housing tables. Each table is iterated for 336 population groups: the total population, 132 race groups, 78 American Indian and Alaska Native tribe categories (reflecting 39 individual tribes), 39 Hispanic or Latino groups, and 86 ancestry groups.
Gradient Transport Correction (GTC): A General Confinement Method for Better Simulation of Rotor Wake and Vortex-Dominated Flows Project
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
CFD modeling and simulation has been heavily invested in decades of manpower by a large community of researchers. However, the excessive numerical diffusion inherently caused by discretization errors plus the possibly largest/finest grid requirement for rotor wake modeling prevents CFD to be routinely used in practical engineering calculations. The proposed Gradient Transport Correction (GTC) method provides an innovative artificial compression that can serves as a general confinement for greatly enhancing the resolution of rotor wake capturing while significantly reducing the grid requirement. In this proposal, we have demonstrated the great potential of GTC method to counteract the numerical dissipation and absolutely preserve the wake vortical structure with a small number of grid cells. Phase I will develop an initial capability, and the capability to be established in Phase I will be developed into a general engineering tool that has engineering analysis accuracy as well as transparent set-up for a broad range of important engineering calculations, such as computing hover performance, high-lift and separation flows, as well as various types of multiple rotors.
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
These data identify, in general, the areas of final critical habitat for Lynx canadensis (Canada lynx).
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
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Description
The probability rating which covers landcover mapping provides a continuum of wetness from dry to water. The layer is not a wetland classification but provides the wetland likelihood at a specific location. The rating was developed through a modelling process combining multiple GIS and remote sensing data sets including soil characteristics, elevation, existing wetland inventories, hydrographical extents and satellite imagery . Data available via download from the Digital Coast, either from customizable download in NOAA's Digital Access Viewer or FTP download by regions.
Published By Federal Emergency Management Agency, Department of Homeland Security
Issued almost 10 years ago
Summary
Description
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to the earth's surface using the North American Datum of 1983 (NAD 83) HARN Virginia State Plane south zone (FIPSZONE 4502) coordinate system and the Lambert Conformal Conic projection. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.
Oceanographic profile temperature, salinity, oxygen measurements collected using bottle from multiple platforms in the Azov, Black Seas from 1924-1990 (NODC Accession 0002717)
Published By National Oceanic and Atmospheric Administration, Department of Commerce
Issued almost 10 years ago
Summary
Description
Oceanographic profile temperature, salinity, oxygen measurements collected using bottle from multiple platforms in the Azov, Black Seas from 1924-1990
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
Summary
Description
KaZaK Composites proposes to develop a pultrusion process to produce carbon fiber / liquid crystal polymer (LCP) prepreg, a first for this category of materials and a critical development for its inclusion in new high performance composite materials. Until now, commercially available LCPs were not suitable for RTM or RFI carbon fiber composite processing. LKX1215 is a novel thermosetting LCP with excellent mechanical, thermal, and chemical properties, in particular low moisture pickup and low outgassing. Its relatively low melt viscosity and ability to cross-link at temperatures above 310<SUP>o</SUP>C make it a prime candidate resin for processing into carbon fiber prepreg. Preliminary work by KaZaK on LKX1215 suggests this material is well suited to continuous carbon fiber reinforcement. The prepreg material developed by KaZaK under the proposed program will be characterized in terms of physical, microstructural, and mechanical properties. Development of techniques for prepreg processing into cured composite laminates and characterization of the mechanical properties of the resulting composite laminates will also be an important part of the proposed program. At the conclusion of Phase I, KaZaK will have developed and demonstrated a previously unavailable process for making carbon fiber composite material for a wide range of cryogenic and high-temperature applications.
Published By U.S. Geological Survey, Department of the Interior
Issued almost 10 years ago
Summary
Description
This coverage contains estimates of herbicide use for the 20 most-used herbicides in the conterminous United States as reported in Gianessi and Puffer (1991). Herbicide-use estimates in this coverage are reported for each county polygon as acres treated, pounds of active ingredient used, and pounds used per square mile. The herbicide-use estimates provided by Gianessi and Puffer (1991) list acres treated and pounds of active ingredient applied for a given crop in each county for which use has been estimated. Cropping data are from the 1987 Census of Agriculture, and are subject to occasional suppressions of acreage estimates at the county level due to problems of confidentiality and census disclosure rules. The herbicide-use estimates included in this coverage are totals of use on all crops treated in a given county. The polygons representing county boundaries in the conterminous United States, as well as lakes, estuaries, and other nonland-area features were derived from the Digital Line Graph (DLG) files representing the 1:2,000,000-scale map in the National Atlas of the United States (1970). Herbicides Herbicide use Counties United States
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
LOCATION: Lat. 39 deg 39 37N, long. 93 deg 9 9W, 23 miles east southeast of Chillicothe, MO, Charlton County. Gage is on the right bank, 75 feet south of bridge abutment near Fulbright Road crossing.DRAINAGE AREA: 48.9 square miles SURFACE WATER RECORDS PERIOD OF RECORD: April 29, 2010 to present. GAGE SITE: Sutron Monitor 1 in metal gage housing in communication with a KPSI submersible pressure transducer mounted on a fencepost in the streambed under the bridge. Instruments are powered by a solar panel run to a battery inside the gage housing. Stage data are collected at 15 minute intervals. NATIONAL WILDLIFE REFUGE: Swan Lake NWR REMARKS: Records coded FAIR for 2010 calendar year.
Final critical habitat for the Kauai cave wolf spider (Adelocosa anops) and the Kauai cave amphipod (Spelaeorchestia koloana)
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
These data identify, in general, the areas where final critical habitat for the Kauai cave wolf spider (Adelocosa anops) and the Kauai cave amphipod (Spelaeorchestia koloana) occur.
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
Summary
Description
This report presents baseline distribution data gathered for Anodonta beringiana, Anodonta kennerlyi, and Margaritifera falcata in the coastal waters of southern Alaska. It also continues an investigation on two invasive mollusks, the Zebra mussel and the New Zealand mudsnail.
Published By Department of Justice
Issued almost 10 years ago
Summary
Description
áeCPIC - Electronic Capital Planning and Investment Control (eCPIC) is a GOTS Web-based software application that provides DOJ with a mechanism to ensure uniformity within and across their organizations in the selection and management of Information Techn
Published By National Aeronautics and Space Administration
Issued almost 10 years ago
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Description
CRISM, CTX, HiRISE, MARCI, MCS, RSS, SPICE
Published By National Park Service, Department of the Interior
Issued almost 10 years ago
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Description
This point feature class contains points representing field sample data (3 plots points and 46 observations points, collected June 2007) for the vegetation mapping project at Golden Spike National Historic Site. Complete metadata for field data collected can be obtained from http://biology.usgs.gov/npsveg/gosp/index.html metadata links. Field photos are associated with each plot or observation location.
Published By Department of Agriculture
Issued almost 10 years ago
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Description
Patented technologies on animal health that are available for licensing
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
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Description
The Seney NWR Furbearer Management Plan directs the management and regulation of trapping. The furbearer management program directly supports the environmental health, wildlife, habitat, and recreational usage goals of the Refuge. Furbearers included in this plan are beaver, mink, raccoon, skunk, muskrat, weasel, red fox, and coyote.
Published By Department of Agriculture
Issued almost 10 years ago
Summary
Description
Summary reports of the volume of meat graded for quality by the USDA Agricultural Marketing Service.